1812 Resistors
Reviewed by: Jon Lowy, consulting engineer
Description
1812 resistors are passive electrical components used to limit or regulate the flow of electrical current in a circuit. They are characterized by their specific size, which is 18mm x 12mm, and are commonly used in surface-mount technology (SMT) applications. These resistors are designed to provide a specific resistance value, which is crucial for controlling current and voltage levels within electronic circuits.
Working Principle
The working principle of 1812 resistors is based on Ohm's Law, which states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance. The resistor's primary function is to impede the flow of electric current, thereby controlling the amount of current that passes through it. This is achieved by converting electrical energy into heat, which is dissipated into the surrounding environment. The usefulness of resistors, including the 1812 type, lies in their ability to protect sensitive components from excessive current, divide voltages, and set biasing conditions in electronic circuits.
Applications
1812 resistors are widely used in various electronic applications due to their compact size and reliability. They are commonly found in consumer electronics, automotive electronics, and industrial equipment. Specific examples include their use in power supplies, where they help regulate voltage levels, and in audio equipment, where they are used to control signal levels. Additionally, they are employed in telecommunications devices to ensure stable operation by managing current flow.
Advantages over other Resistors
One of the advantages of 1812 resistors over other types is their suitability for surface-mount applications, which allows for more compact and lightweight electronic designs. This makes them ideal for modern electronic devices that require miniaturization. Furthermore, their standardized size and shape facilitate automated assembly processes, reducing manufacturing costs and improving production efficiency.
Limitations
Despite their advantages, 1812 resistors have limitations, such as their power handling capacity, which may not be sufficient for high-power applications. They can also be susceptible to damage from excessive heat or voltage, which can lead to failure. Additionally, their small size can make them challenging to handle during manual assembly or repair processes.
Considerations
When selecting 1812 resistors, several considerations should be taken into account. Initial costs are generally low due to their widespread availability and standardized production. Operating expenses are minimal, but care must be taken to ensure they are used within their specified ratings to avoid premature failure. Durability is generally high, but environmental factors such as temperature and humidity can affect performance. Accuracy is determined by the resistor's tolerance, which should be chosen based on the application's requirements. Replacement and maintenance costs are typically low, but accessibility for replacement can be an issue in densely packed circuit boards.
from DigiKey
RES 1.00K OHM 3/4W 1% 1812 SMD [See More]
- Mounting / Packaging: 1812; 1812
- Category / Application: Automotive; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from RS Components, Ltd.
Low Ohmic Resistor, 1812,0.5W,1%,2R7 [See More]
- Mounting / Packaging: Surface Mount Technology (SMT / SMD); 1812; 1812 (4532M)
- Resistance Range: 2.7
- Technology / Construction: Thick Film (Chip); Thick Film
- Tolerance: 1
from ASAP Semiconductor LLC
RES 0.015ohm 1W 5% 1218 SMD 0.015 1W Thick Film Current Sense ¦2000ppm/ ¦C ¦5% 1812 (4632 Metric) Wide (Long Side) 1218 (3246 Metric) 0.120"" L x 0.181"" W (3.05mm x 4.60mm) 0.026"" (0.65mm) 2 Digi-Reel « [See More]
- Mounting / Packaging: Surface Mount Technology (SMT / SMD); 1812
- Technology / Construction: Thick Film (Chip)
- Category / Application: Current Sensing
- Resistance Range: 0.0150
from DigiKey
RES 1 OHM 1% 1/2W 1812 [See More]
- Mounting / Packaging: 1812; 1812
- Category / Application: Automotive; Current Sensing; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from RS Components, Ltd.
Thick Film Resistors 1812 0R 0.75W [See More]
- Mounting / Packaging: Surface Mount Technology (SMT / SMD); 1812; 1812 (4532M)
- Resistance Range: 0.0
- Technology / Construction: Thick Film (Chip); Thick Film
- Temperature Coefficient: -100 to 600
from DigiKey
RES 100 OHM 5% 3/4W 1812 [See More]
- Mounting / Packaging: 1812; 1812
- Category / Application: Automotive; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from RS Components, Ltd.
Thick Film Resistors 1812 0R 0.75W [See More]
- Mounting / Packaging: Surface Mount Technology (SMT / SMD); 1812; 1812 (4532M)
- Resistance Range: 0.0
- Technology / Construction: Thick Film (Chip); Thick Film
- Temperature Coefficient: -100 to 600
from DigiKey
1 Ohms ±1% 0.75W, 3/4W Chip Resistor 1812 (4532 Metric) Anti-Sulfur, Automotive AEC-Q200 Thick Film [See More]
- Mounting / Packaging: 1812; 1812
- Category / Application: Automotive; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
RES SMD 1K OHM 1W 1812 WIDE [See More]
- Mounting / Packaging: 1812; Wide 1812
- Category / Application: Automotive; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
RES 100 OHM 1% 1W 1218 [See More]
- Mounting / Packaging: 1812; Wide 1812
- Category / Application: Automotive; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
RES CHIP 1218 [See More]
- Mounting / Packaging: 1812; Wide 1812
- Category / Application: Automotive; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
100 Ohms ±1% 1W Chip Resistor Wide 1812 (4532 Metric), 1218 Automotive AEC-Q200, Moisture Resistant Thick Film [See More]
- Mounting / Packaging: 1812; Wide 1812
- Category / Application: Automotive; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
10 mOhms ±5% 1W Chip Resistor Wide 1812 (4532 Metric), 1218 Automotive AEC-Q200, Moisture Resistant Thick Film [See More]
- Mounting / Packaging: 1812; Wide 1812
- Category / Application: Automotive; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
3.3 Ohms ±1% 1W Chip Resistor Wide 1812 (4532 Metric), 1218 Automotive AEC-Q200, Moisture Resistant Thick Film [See More]
- Mounting / Packaging: 1812; Wide 1812
- Category / Application: Automotive; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
10 kOhms ±5% 1W Chip Resistor Wide 1812 (4532 Metric), 1218 Automotive AEC-Q200 Thick Film [See More]
- Mounting / Packaging: 1812; Wide 1812
- Category / Application: Automotive; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
CRCW1218 0 OHM JUMPER ET9 E3 [See More]
- Mounting / Packaging: 1812; Wide 1812
- Category / Application: Automotive; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
0 Ohms Jumper 1W Chip Resistor Wide 1812 (4532 Metric), 1218 Anti-Sulfur, Automotive AEC-Q200 Thick Film [See More]
- Mounting / Packaging: 1812; Wide 1812
- Category / Application: Automotive; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
RCA1218 2R2 1% 100 RT9 [See More]
- Mounting / Packaging: 1812; Wide 1812
- Category / Application: General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
100 kOhms ±1% 1W Chip Resistor Wide 1812 (4532 Metric), 1218 Automotive AEC-Q200 Thick Film [See More]
- Mounting / Packaging: 1812; Wide 1812
- Category / Application: Automotive; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
100 Ohms ±0.05% 0.125W, 1/8W Chip Resistor 1812 (4532 Metric), J-Lead Metal Foil [See More]
- Mounting / Packaging: Surface Mount Technology (SMT / SMD); 1812; 1812
- Category / Application: General Use
- Configuration: Single Resistor
- Technology / Construction: Metal Foil
from DigiKey
MQP10K000Q 0.02% REELED [See More]
- Mounting / Packaging: 1812; 1812
- Category / Application: General Use
- Configuration: Single Resistor
- Technology / Construction: Metal Foil
from DigiKey
NMQ130R0DL T/R THERMOSENSITIVE [See More]
- Mounting / Packaging: 1812; 1812
- Category / Application: General Use
- Configuration: Single Resistor
- Technology / Construction: Metal Foil
from DigiKey
85 mOhms ±1% 0.5W, 1/2W Chip Resistor 1812 (4532 Metric) Automotive AEC-Q200, Current Sense Thick Film [See More]
- Mounting / Packaging: 1812; 1812
- Category / Application: Automotive; Current Sensing; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
44 mOhms ±5% 0.5W, 1/2W Chip Resistor 1812 (4532 Metric) Automotive AEC-Q200, Current Sense Thick Film [See More]
- Mounting / Packaging: 1812; 1812
- Category / Application: Automotive; Current Sensing; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
3.09 kOhms ±0.5% 0.75W, 3/4W Chip Resistor 1812 (4532 Metric) Anti-Sulfur, Automotive AEC-Q200 Thick Film [See More]
- Mounting / Packaging: 1812; 1812
- Category / Application: Automotive; General Use
- Configuration: Single Resistor
- Technology / Construction: Thick Film (Chip)
from DigiKey
25 kOhms ±0.05% 0.125W, 1/8W Chip Resistor 1812 (4532 Metric), J-Lead Metal Foil [See More]
- Mounting / Packaging: Surface Mount Technology (SMT / SMD); 1812; 1812
- Category / Application: General Use
- Configuration: Single Resistor
- Technology / Construction: Metal Foil
from Trigon Components, Inc.
SERIES. RCH. DESCRIPTION. Chip. RESISTANCE RANGE. 1 ohm to 10 Mohm. POWER RATING. 1/6W to 1W. OPERATING TEMPERATURE. -55 to +155 Deg C. PACKAGE. SMD 0201 to 2512. FEATURE. •Extremely Thin and Light. •Highly Reliable Multilayer Electrode Construction. •Compatible with all Soldering... [See More]
- Mounting / Packaging: Surface Mount Technology (SMT / SMD); 0201; 0402; 0603; 0805; 1206; 1625; 1812; 2010; 2512
- Category / Application: General Use
- Configuration: Single Resistor
- Resistance Range: 1 to 1.00E7
from Utmel Electronic Limited
RES SMD 0 OHM 1W 1812 WIDE [See More]
- Mounting / Packaging: Surface Mount Technology (SMT / SMD); 1812; SURFACE MOUNT
- Technology / Construction: Thick Film (Chip); Thick Film
- Configuration: Single Resistor
- Resistance Range: 0.0
from Trigon Components, Inc.
SERIES. RCRH. DESCRIPTION. High Ohmic Chip. RESISTANCE RANGE. 11 Mohm to 39 Mohm. POWER RATING. 1/16 to 1W. OPERATING TEMPERATURE. -55 to +125?. PACKAGE. SMD 0402 to 2512. FEATURE. •Low Assembly Costs. •Reduced Size of Final Equipment. •Higher Component and Equipment Reliability. [See More]
- Mounting / Packaging: Surface Mount Technology (SMT / SMD); 0402; 0603; 0805; 1206; 1625; 1812; 2010; 2512
- Category / Application: High Voltage Resistor
- Configuration: Single Resistor
- Resistance Range: 1.10E7 to 3.90E7
from Utmel Electronic Limited
RES SMD 1 OHM 1W 1812 WIDE [See More]
- Mounting / Packaging: 1812
- Technology / Construction: Thick Film (Chip); Thick Film
- Configuration: Single Resistor
- Resistance Range: 1
from Trigon Components, Inc.
SERIES. RCRL. DESCRIPTION. Low Ohmic Chip. RESISTANCE RANGE. 0.102 ohm to 0.976 ohm. POWER RATING. 1/16 to 1W. OPERATING TEMPERATURE. -55 to +155 Deg C. PACKAGE. SMD 0402 to 2512. FEATURE. •Low Inductance. •Highly Reliable Multilayer Electrode Construction. •Higher Component and... [See More]
- Mounting / Packaging: Surface Mount Technology (SMT / SMD); 0402; 0603; 0805; 1206; 1625; 1812; 2010; 2512
- Category / Application: High Frequency
- Configuration: Single Resistor
- Resistance Range: 0.1020 to 0.9760
from Utmel Electronic Limited
RES SMD 100K OHM 1% 3/4W 1812 [See More]
- Mounting / Packaging: Surface Mount Technology (SMT / SMD); 1812; Surface Mount
- Technology / Construction: Thick Film (Chip); Thick Film
- Configuration: Single Resistor
- Resistance Range: 100000
from Trigon Components, Inc.
SERIES. RCRW. DESCRIPTION. High Power Chip. RESISTANCE RANGE. 0.02 ohm to 10 Mohm. POWER RATING. 1/8 to 2W. OPERATING TEMPERATURE. -55 to +155 Deg C. PACKAGE. SMD 0603 to 2512. FEATURE. •Small and light weight. •Small size with high power rating. •Taping and bulk cassette are... [See More]
- Mounting / Packaging: Surface Mount Technology (SMT / SMD); 0603; 0805; 1206; 1625; 1812; 2010; 2512
- Category / Application: Power Applications
- Configuration: Single Resistor
- Resistance Range: 0.0200 to 1.00E7
from Trigon Components, Inc.
SERIES. RSN. DESCRIPTION. Chip Surge. RESISTANCE RANGE. 10 ohm to 1 Mohm. POWER RATING. 1/10W to 1W. OPERATING TEMPERATURE. -55 to +155 Deg C. PACKAGE. SMD 0603 to 2512. FEATURE. ?Small size and lightweight with size range per int ’l standard. ?Highly stable in auto-placement surface mounting... [See More]
- Mounting / Packaging: Surface Mount Technology (SMT / SMD); 0603; 0805; 1206; 1625; 1812; 2010; 2512
- Category / Application: Surge Resistor
- Configuration: Single Resistor
- Resistance Range: 10 to 1.00E6