Axial Leads Shunt Resistors
Last Updated: February 12, 2025
Description
Axial leads shunt resistors are a type of resistor characterized by their axial lead configuration, where the leads are aligned parallel to the axis of the cylindrical body. These resistors consist of a winding of resistive wire on a cylindrical ceramic substrate, with metal wire leads typically made of copper plated with a tin-lead alloy. The leads are welded to metal caps at the ends of the cylinder, which are also connected to the resistive wire. The body of the resistor is coated with a protective enamel or mineral-filled silicone coating .
Working Principle
Axial leads shunt resistors operate by providing a low-resistance path for current to flow, allowing for the measurement of current by detecting the voltage drop across the resistor. The resistive wire wound on the ceramic substrate creates a precise resistance value, which is crucial for accurate current measurement. These resistors are useful because they offer a stable and reliable means of measuring current in various electrical circuits, with minimal impact on the circuit's overall performance .
Applications
Axial leads shunt resistors are commonly used in applications requiring precise current measurement and monitoring. Specific examples include their use in power supply circuits, battery management systems, and current sensing in automotive and industrial applications. They are particularly valuable in scenarios where accurate current measurement is critical for system performance and safety .
Advantages over other Shunt Resistors
Axial leads shunt resistors offer several advantages over other types of shunt resistors. Their construction allows for a robust and stable resistance value, which is less susceptible to changes in temperature and aging. This stability is crucial for applications requiring long-term reliability and precision. Additionally, the axial lead configuration can provide better mechanical stability and ease of installation in certain circuit designs .
Limitations
Despite their advantages, axial leads shunt resistors have limitations. They can exhibit parasitic inductance and capacitance, which may affect performance in high-frequency applications. Additionally, like all resistors, they are subject to changes in resistance due to temperature variations and aging, which can impact accuracy over time. These factors must be considered when designing circuits that require precise current measurement .
Considerations
When selecting axial leads shunt resistors, several considerations should be taken into account. Initial costs can vary depending on the material and construction quality, with higher precision resistors typically costing more. Operating expenses are generally low, but the resistors must be chosen to handle the expected power dissipation to avoid overheating. Durability and accuracy are influenced by the resistor's temperature coefficient of resistance (TCR) and long-term stability. Replacement and maintenance costs are minimal, but regular calibration may be necessary to ensure continued accuracy in critical applications .
from KOA Speer Electronics, Inc.
Features. Extremely low resistance and high precision tolerance. Low T.C.R. achieved ( ±50ppm/ °C). Flameproof UL 94 V-0. Products with lead-free terminations meet EU RoHS and China RoHS requirements [See More]
- Mounting / Packaging: ThroughHole; Axial Leads
- Tolerance: 0.5000 to 1
- Resistance Range: 0.0050 to 0.0500
- Temperature Coefficient: 50
from KOA Speer Electronics, Inc.
Features. Ultra low resistance, suitable for large current sensing. Excellent T.C.R. achieved (50 ±25 x 10-6/K). Correct electric current detection by a voltage pin is possible. Bus bar and cable can be screwed on. 2D code means individual resistance information. Products meet EU RoHS... [See More]
- Mounting / Packaging: ThroughHole; Axial Leads; 4015M ~ 8022M
- Tolerance: 5
- Resistance Range: 5.00E-5 to 2.00E-4
- Temperature Coefficient: 5025 to 7550
from KOA Speer Electronics, Inc.
Features. Correcter electric current detection is possible with 4-terminal construction. Excellent T.C.R. achieved ( ±50x10-6/K). Ultra low resistance, suitable for large current sensing. Automatic mounting machines are applicable. Suitable for reflow soldering (Not suitable for flow... [See More]
- Mounting / Packaging: ThroughHole; Axial Leads; 1216
- Tolerance: 1
- Resistance Range: 5.00E-4 to 1.00E-3
- Temperature Coefficient: 50
from KOA Speer Electronics, Inc.
Features. Ultra low resistance, suitable for large current sensing. Automatic mounting machines are applicable. Suitable for reflow soldering (Not suitable for flow soldering). Products meet EU RoHS requirements. AEC-Q200 Tested [See More]
- Mounting / Packaging: ThroughHole; Axial Leads; 2512; 2512
- Tolerance: 1
- Resistance Range: 2.00E-4 to 5.00E-4
- Temperature Coefficient: 115 to 250100
from KOA Speer Electronics, Inc.
Features. SMD type of small size, ultra-low resistance (3m Ω~) and high accuracy ( ±0.5%) resistor for current sensing. Flameproof UL94V0 molded polymer case. Excellent dimension accuracy, mountability and shock resistance. Excellent terminal strength and solderability due to structure of... [See More]
- Mounting / Packaging: ThroughHole; Axial Leads
- Standards and Certifications: RoHS
from KOA Speer Electronics, Inc.
Features. Surface mount type of small size, high accuracy ( ±0.5%) with low resistance to high resistance. Flameproof UL94V0 molded polymer case. Excellent dimension accuracy, mountability and shock resistance. Suitable for flow, reflow, and iron solderings. Products with lead-free terminations... [See More]
- Mounting / Packaging: ThroughHole; Axial Leads
- Standards and Certifications: RoHS
from KOA Speer Electronics, Inc.
Features. SMD type of small size, ultra-low resistance (3m Ω~) and high accuracy ( ±0.5%) resistor for current sensing. Flameproof UL94V0 molded polymer case. Excellent dimension accuracy, mountability and shock resistance. Excellent terminal strength and solderability due to structure of... [See More]
- Mounting / Packaging: ThroughHole; Axial Leads; 2010~ 4527
- Tolerance: 0.5000 to 5
- Resistance Range: 5.00E-4 to 0.2000
- Temperature Coefficient: 50 to 180
from KOA Speer Electronics, Inc.
Features. Current detecting resistors for power supply, motor circuits, etc. High reliability and performance with resistance tolerance ±0.5%, T.C.R. ±100 ×10-6/K. Suitable for both reflow and flow solderings. Products with lead-free terminations meet EU RoHS requirements. EU RoHS... [See More]
- Mounting / Packaging: ThroughHole; Axial Leads; 2512; 2512
- Tolerance: 1 to 5
- Resistance Range: 0.0390 to 10
- Temperature Coefficient: 100 to 800
from Riedon, Inc.
Resistances from 0.003 to 0.10Ohms. Tolerance to ±0.1%. TCR ’s to ± 20 ppm/K ( Four Terminal Version ). For Current Sensing and Shunt Applications. All Welded Construction. Low Inductance ( <10nH ). Four Terminal Versions Available (Consult Factory) [See More]
- Mounting / Packaging: Axial Leads
- Tolerance: 0.1000 to 5
- Resistance Range: 0.0030 to 0.1000
- Temperature Coefficient: 20
from Ohmite Manufacturing Co.
Precision metal clad resistors designed in four terminal technique, are distinguished by high load capacity as well as excellent accuracy. Isolated voltage and current connections making them suitable for very precise current measurements. The large slotted connection ensures easy installation on... [See More]
- Mounting / Packaging: Axial Leads; Tab Terminals
- Tolerance: 0.1000 to 0.5000
- Resistance Range: 0.3333 to 1
- Temperature Coefficient: 30
from RCD Components, Inc.
SPECIAL PURPOSE ZERO-OHM JUMPERS. RCD “zero-ohm ” jumpers were developed for use as interconnection devices between points on a PCB when separated by circuit paths, or when the pcb layout has been changed requiring new point connections. Specify ZJ Series (insulated bodies) when jumpers... [See More]
- Mounting / Packaging: Axial Leads
- Current Rating: 2 to 10
- Resistance Range: 0.0200 to 20000
- Operating Temperature: -55 to 175
from RCD Components, Inc.
RCD “zero-ohm ” jumpers were developed for use as interconnection devices between points on a PCB when separated by circuit paths, or when the pcb layout has been changed requiring new point connections. Specify ZJ Series (insulated bodies) when jumpers are in close proximity with... [See More]
- Mounting / Packaging: Axial Leads
- Current Rating: 10 to 25
- Resistance Range: 0.0015 to 1500
- Operating Temperature: -55 to 155