Last Updated: November 6, 2024 Reviewed by: Scott Orlosky, consulting engineer
Description
IEC 269-2 1 fuses are a type of fuse designed to provide overcurrent protection in electrical circuits. These fuses act as a weak link in the circuit, reliably rupturing and isolating the faulty circuit under overload and short-circuit fault conditions to protect equipment and personnel. They must be manually replaced after fault clearance before the circuit can be put back into operation. Some designs include striker pins that can initiate remote alarms upon fuse operation.
Working Principle
The working principle of IEC 269-2 1 fuses involves the melting of a fusible element when the current exceeds a specific threshold. This melting interrupts the electrical flow, thereby protecting the circuit from damage due to overcurrent. The voltage rating of the fuse indicates its ability to extinguish the arc generated as the fuse element melts under fault conditions. The current rating must exceed the maximum DC or RMS current demanded by the protected circuit, and the let-through current, or I²t rating, is crucial for selecting the correct fuse.
Applications
IEC 269-2 1 fuses are used in various applications where overcurrent protection is essential. These include protecting semiconductor circuitry, secondary circuits, and low voltage integrated circuits (ICs). They are also used in high voltage applications, with some types designed for use up to 72 kV. The specific application depends on the fuse's current, voltage, and breaking capacity ratings.
Advantages
One of the primary advantages of IEC 269-2 1 fuses is their reliability in protecting electrical circuits from overcurrent conditions. They provide a simple and effective means of isolating faulty circuits, thereby preventing damage to equipment and enhancing safety for personnel. Additionally, the availability of striker pins in some designs allows for remote monitoring and alarm initiation, adding an extra layer of safety and convenience.
Limitations
A significant limitation of IEC 269-2 1 fuses is that they must be manually replaced after they operate. This can lead to downtime in the circuit until the fuse is replaced. Furthermore, the selection of the correct fuse requires careful consideration of various parameters, including current rating, voltage rating, and let-through current, which can complicate the selection process.
Considerations
When selecting IEC 269-2 1 fuses, it is essential to consider the maximum continuous operating current of the circuit and the influence of ambient temperature on the fuse's performance. The voltage rating should be chosen based on the maximum effective operating voltage of the circuit, and the breaking capacity rating should be sufficient to handle the maximum possible fault current without causing destruction or maintaining an arc. Proper selection ensures reliable long-term performance and optimal protection for the application.
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Description: The following characteristics of fuses are specified in addition to IEC Publication 269-1: - minimum rated breaking capacities; - time-current characteristics; - I2t characteristics; - standard conditions of constructions; - power dissipation and acceptance.
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Supplier: Allied Electronics, Inc.
Description: Entrance” equipment. This global product is also CSA certified, CE marked and meets the requirements of IEC 947-1-3 and IEC 269. Available in ratings from 30-800 ampere (fusible) and 30-1200 ampere (non-fused), these switches are designed to reduce panel space up to 25%
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Supplier: Allied Electronics, Inc.
Description: Entrance” equipment. This global product is also CSA certified, CE marked and meets the requirements of IEC 947-1-3 and IEC 269. Available in ratings from 30-800 ampere (fusible) and 30-1200 ampere (non-fused), these switches are designed to reduce panel space up to 25%
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Supplier: VICFUSE
Description: current up to 125A.It can also be used with load switch, vacuum contactor, etc. This product conforms to THE IEC60282-1 standard as well as the British BS2692-1 standard and GB15166.2 standard.
- Voltage Rating: 7,200 volts
- Current Rating: 125 amps
- Approvals / Standards: RoHS Compliant
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Supplier: VICFUSE
Description: Voltage Rating: 3.6/7.2 KVAC. Ampere Rating:70~700A . Breaking Capacity: 50-63kA. High-voltage current-limiting fuses for motor protection are suitable for ac 50Hz, rated voltage 3.6/7.2kV, rated current 400A(3.6 kV) and 224A(7.2 kV) power system, as overload or short circuit
- Voltage Rating: 7,200 volts
- Current Rating: 700 amps
- Approvals / Standards: RoHS Compliant
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Supplier: Rittal North America LLC
Description: with centre-to-centre spacing 60 mm Cable outlet Top/bottom Type of connection (electrical) Box terminal Rated operating current (max.) 160 A NH construction size 00 Test specification IEC 60 947-3 IEC 60 269-2 (fuse inserts) Dimensions Width: 106 mm Height: 194 mm
- Current Rating: 160 amps
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Supplier: Allied Electronics, Inc.
Description: Entrance” equipment. This global product is also CSA certified, CE marked and meets the requirements of IEC 947-1-3 and IEC 269. Available in ratings from 30-800 ampere (fusible) and 30-1200 ampere (non-fused), these switches are designed to reduce panel space up to 25%
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Supplier: Rittal North America LLC
Description: 947-3 IEC 60 269-2 (fuse inserts) Dimensions Width: 210 mm Height: 298 mm ( Width: 8.27 ˝ Height: 11.7 ˝ ) Connection for round conductor cross-sections 10 ‐ 240 mm² Weight/packaging unit 3.1 kg ( 6.8 lb. ) Packaging unit 1 pc(s). Copper weight (kg per
- Current Rating: 400 amps
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Supplier: UL Standards & Engagement
Description: non-metallic parts of enclosures 7.1 7.1 General 7.1.1 7.1.1 Applicability Applies Applies 7.1.2 7.1.2 Specification of materials Applies Applies 7.2 7.2 Thermal endurance 7.2.1 7.2.1
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Supplier: UL Standards & Engagement
Description: non-metallic parts of enclosures 7.1 7.1 General 7.1.1 7.1.1 Applicability Applies Applies 7.1.2 7.1.2 Specification of materials Applies Applies 7.2 7.2 Thermal endurance 7.2.1 7.2.1
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Supplier: UL Standards & Engagement
Description: and non-metallic parts of enclosures - Applicability Replaced by the last paragraph of 1 Replaced by the last paragraph of 1 Applies 7.1.2.1 Specification of materials, General Replaced by the last paragraph of 1 Replaced by the last paragraph of 1
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Supplier: UL Standards & Engagement
Description: Applies Applies 5.1.2 5.1.2 External source of heating or cooling Applies Applies Applies 5.2 5.2 Service temperature Applies Applies Applies 5.3.1 5.3.1 Determination of maximum surface temperature Applies Applies Excluded
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Supplier: Altech Corp.
Description: Miniature Fuses are typically used to protect electronic devices, laboratory and measurement instruments, stereos, TV’s, VCR’s etc. They are available in four sizes with a current range of 20mA to 20 Amps.
- Voltage Rating: 250 volts
- Current Rating: 0.1 amps
- Approvals / Standards: IEC (UMF) Approval, VDE Approval
- Fuse Type: Miniature, Protective
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Supplier: DigiKey
Description: 7A 125V AC 125V DC Fuse Board Mount (Cartridge Style Excluded) Surface Mount 2-SMD, Square End Block
- Rated Breaking Capacity: 350 amps
- Operating Temperature: -55 to 125 C
- Approvals / Standards: IEC (UMF) Approval, UL Approval
- Fuse Type: PC Board
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Supplier: RS Components, Ltd.
Description: RS PRO AAO16RS British Standard Fuse
- Approvals / Standards: IEC (UMF) Approval
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Supplier: Altech Corp.
Description: NH fuses are typically used for power distribution applications and to protect large electrical devices such as motors, drives, etc. They are available in seven sizes with a current range of 2 to 1600 Amps. NH fuses have knife blades at both ends, which mount into Fuse
- Voltage Rating: 500 volts
- Current Rating: 25 amps
- Fuse Type: Blade Type
- Approvals / Standards: IEC (UMF) Approval, VDE Approval
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Supplier: Altech Corp.
Description: Semiconductor Fuses have extremely fast acting trip characteristics and provide short circuit and overload protection for diodes, SCR's etc. Current limiting, super fast blow. Semiconductor Fuses offered comply with IEC, DIN and VDE standards and are available in two trip
- Voltage Rating: 660 volts
- Current Rating: 315 amps
- Fuse Type: Blade Type
- Features: Fast Acting, Other
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Supplier: Altech Corp.
Description: High Voltage Fuses are typically used in distribution circuits and can be used for indoor or outdoor applications. They are available in four lengths and four different voltage ranges. Fuses supplied standardly with Striker Pins.
- Voltage Rating: 24,000 volts
- Current Rating: 20 amps
- Approvals / Standards: IEC (UMF) Approval, VDE Approval
- Fuse Type: Protective
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Supplier: SCHURTER Inc
Description: Description ESCC QPL Listed, see www.escies.org Full data sheet available on request Hermetically sealed, robust and smallest construction with high breaking capacity up to 300 A Unique Selling Proposition ESA ESCC QPL (Qualified Parts List) SnPb finish - effective whisker growing barrier Extensive
- Voltage Rating: 125 volts
- Current Rating: 3.5 amps
- Rated Breaking Capacity: 300 amps
- Operating Temperature: -55 C
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Supplier: SCHURTER Inc
Description: Description UL characteristic Low melting I²t-values, fast interruption Marking optional Impermeable to potting compound Unique Selling Proposition Space constrained applications Applications Secondary Protection Circuits without inrush Semiconductor protection Digital Consumer Electronics
- Voltage Rating: 32 volts
- Current Rating: 5 amps
- Rated Breaking Capacity: 35 amps
- Operating Temperature: -55 C
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Supplier: SCHURTER Inc
Description: Description Complements USF 1206 with lower current ratings Impermeable to potting compound Unique Selling Proposition Lowest voltage drop Very fast, precise opening Applications Smart meters Battery protection Sensors Mobile devices Semiconductor protection
- Voltage Rating: 125 volts
- Current Rating: 0.25 amps
- Rated Breaking Capacity: 100 amps
- Operating Temperature: -55 C
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Supplier: DigiKey
Description: 315A AC 1.5kV DC Fuse Rectangular Bolt Mount
- Current Rating: 315 amps
- Rated Breaking Capacity: 30,000 amps
- Fuse Type: Blade Type
- Approvals / Standards: IEC (UMF) Approval, UL Approval
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Supplier: SCHURTER Inc
Description: Description Low Breaking Capacity Directly solderable on printed circuit boards Applications Telecom Household appliances
- Voltage Rating: 125 volts
- Current Rating: 15 amps
- Rated Breaking Capacity: 150 amps
- Operating Temperature: -55 C
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Supplier: Mersen
Description: These 1250/1300V Protistor® fuse-links provide maximum flexibility in equipment design and ultimate protection for today's power conversion equipment. These aR ultra-fast acting square body fuse-links are available in different body sizes, each size having multiple worldwide acceptable
- Voltage Rating: 1,300 volts
- Current Rating: 1,800 amps
- Rated Breaking Capacity: 126,000 amps
- Approvals / Standards: CSA Certification, IEC (UMF) Approval, UL Approval
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Supplier: Littelfuse, Inc.
Description: 5x20mm fast-acting glass body cartridge fuse designed to IEC specification. Designed to International (IEC )Standards for use globally Meets the IEC60127-2, Sheet 2 specification for fast-acting fuses Available in cartridge or axial lead form Lead-free and
- Voltage Rating: 250 volts
- Operating Temperature: -55 to 125 C
- Approvals / Standards: BSI Approval, CSA Certification, IEC (UMF) Approval, SEMKO Approval, VDE Approval
- Features: Fast Acting
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Supplier: Allied Electronics, Inc.
Description: 250 V, 1-1⁄4 in. L x 1⁄4 in. D, High Breaking Capacity Fuses According to IEC 127, rated 250 V. Type FSF. UL recognized, CSA accepted 32 mA-10 A, SEMKO, VDE, BEAB approved 32 mA-6.3 A. Type FST. UL recognized, CSA accepted 32 mA-16 A; BSI approved 125 mA-6.3 A; CB,
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Supplier: SOCOMEC
Description: High reliability • Absolute protection over time guaranteed by the simplicity of manufacture and function (Joule effect). • No downgrading of fuse characteristics over time. Improved safety The energy released whilst eliminating the fault (fuse blowing) is contained within the
- Current Rating: 315 amps
- Rated Breaking Capacity: 120,000 amps
- Approvals / Standards: IEC (UMF) Approval
- Mounting: Replaceable (with holder or clips)
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Supplier: Mersen
Description: The 690/700V Protistor® fuse-links provide maximum flexibility in equipment design and ultimate protection for today's power conversion equipment. These aR ultra-fast acting square body fuse-links are available in different body sizes, each size having multiple worldwide acceptable
- Voltage Rating: 700 volts
- Current Rating: 2,500 amps
- Rated Breaking Capacity: 200,000 amps
- Approvals / Standards: CSA Certification, IEC (UMF) Approval, UL Approval
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Supplier: Littelfuse, Inc.
Description: The PICO® 304 series offers a range of surface mountable encapsulated fuses certified under UL 913, the standard for intrinsically safe electrical equipment, to operate in hazardous locations. This fuse is ideal for use in oil, gas, mining, chemical, pharmaceutical, food and beverage,
- Voltage Rating: 277 volts
- Operating Temperature: -40 to 125 C
- Features: Fast Acting
- Approvals / Standards: IEC (UMF) Approval
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Supplier: SOCOMEC
Description: loads. High reliability • Absolute protection over time guaranteed by the simplicity of manufacture and function (Joule effect). • No downgrading of fuse characteristics over time. Improved safety The energy released whilst eliminating the fault (fuse blowing) remains contained within
- Voltage Rating: 690 volts
- Current Rating: 5 amps
- Rated Breaking Capacity: 2,000 amps
- Approvals / Standards: IEC (UMF) Approval
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Supplier: Littelfuse, Inc.
Description: 5x20mm fast-acting ceramic body cartridge fuse designed to IEC specification. Designed to International (IEC )Standards for use globally Meets the IEC 60127-2, sheet 1 specification for fast-acting fuses Available in cartridge or axial lead form
- Voltage Rating: 250 volts
- Operating Temperature: -55 to 125 C
- Approvals / Standards: CSA Certification, IEC (UMF) Approval, SEMKO Approval, VDE Approval
- Features: Fast Acting
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Supplier: Mersen
Description: Extremely high breaking capacity fuses: Protection of power semiconductors complying with IEC standard 60269-1 and -4. Features Voltage rating 500-600 VAC With trip-indicator (1 to 30A), a Mersen speciality (minimum operating voltage for trip-indicator: 20V) Without blown
- Voltage Rating: 500 volts
- Current Rating: 1.6 amps
- Rated Breaking Capacity: 50,000 amps
- Fuse Material: Ceramic
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Supplier: ABB Inc.
Description: Rated Breaking Capacity: 2000 VA DIN-type, HRC-fuse link range ABB offers a full range of DIN-type HRC-fuse links from 2 to 1600 Amperes, 500 V and 690 V. High performance and reliability Fuses have very high limiting capability, clearing faults rapidly at different
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Supplier: Mersen
Description: The 690/700V Protistor® fuse-links range provide maximum flexibility in equipment design and ultimate protection for today's power conversion equipment. These aR ultra-fast acting square body fuse-links are available in different body sizes, each size having multiple worldwide
- Voltage Rating: 700 volts
- Current Rating: 630 amps
- Rated Breaking Capacity: 200,000 amps
- Approvals / Standards: CSA Certification, IEC (UMF) Approval, UL Approval
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Supplier: Littelfuse, Inc.
Description: The 215 series is 5x20, Ceramic body, Time-Lag type Cartridge fuse. With the extension into higher current ratings beyond existing 12A, from 15A up to 25A in cartridge version, in particular for 20A and 25A, it offers designers better flexibility in circuit protection design for high current
- Voltage Rating: 250 volts
- Operating Temperature: -55 to 125 C
- Approvals / Standards: BSI Approval, IEC (UMF) Approval, VDE Approval
- Features: Time Lag
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ISA 12.23.01 - Electrical Apparatus for Use in Class I, Zone 1 Hazardous (Classified) Locations Type of Protection Encapsulation "m"
IEC 269 - 2 - 1 1987 Low voltage fuses : Part 2: .
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ISA S12.23.01 - Electrical Apparatus for Use in Class I, Zone 1 Hazardous (Classified) Locations Type of Protection - Encapsulation "m"
IEC 269 - 2 - 1 1987 Low voltage fuses : Part 2: Supplementary requirements for fuses for use by authorized persons (fuses mainly used for industrial application) Section 1: Examples of types of standardized fuses for use by authorized persons .