Ohmite
OHMITE B20J100E RESISTOR WIREWOUND
Best high-power resistor for demanding industrial and vintage electronics projects.
Experience the robust performance of the Ohmite B20J100 Wirewound Resistor, designed for demanding applications. This fixed resistor offers a stable 100 ohm resistance and a high 20-watt power handling capability, ensuring consistent operation under load. Its durable Vitreous Enamel coating and standard axial lead configuration simplify integration. Measuring approximately 2.1 inches long by 0.51 inches in diameter, this component is available as New Old Stock (NOS) in limited quantities, making it a reliable choice for high-power resistive needs.
$136.67
Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 413
#50 in Resistors
Price vs Category Average
+4%
Above average
Resistance
100
/ ohm
Who it's for
- Engineers designing high-power industrial equipment and power supplies
- Professionals requiring consistent performance in harsh, fluctuating environments
- Builders prioritizing long-term reliability and physical component protection
Who should skip it
- Designers working with high-frequency or fast-switching AC circuits
- Developers constrained by limited PCB or chassis space
- Budget-conscious teams managing strict bill of materials costs
Performance breakdown
Power Handling
Handles 20 watts with ease for demanding high-load circuit requirements.
Thermal Durability
Vitreous enamel coating provides exceptional protection against extreme operating temperatures.
Resistance Stability
Wirewound construction ensures precise, consistent performance under continuous electrical stress.
Integration Ease
Standard axial lead configuration allows for straightforward through-hole mounting.
Build Robustness
Rugged design built to withstand harsh environments and mechanical vibration.
Availability Reliability
Limited New Old Stock status makes long-term sourcing a significant challenge.
Key Specs
Resistance
100 ohm
Power Rating
20 watt
Construction Material
Vitreous Enamel
Lead Style
Axial Lead
Dimensions
2.1" Long x 0.51" Diameter
Manufacturer
Ohmite
Part Number
B20J100
Resistor Type
Fixed Resistor
Features
- Stable wirewound design
- Durable Vitreous Enamel coating
- High 20-watt power handling
- Reliable 100 ohm resistance
- Standard axial lead configuration
- New Old Stock availability
- Built for robust performance
What customers say
Users consistently praise the Ohmite B20J100E for its exceptional durability and thermal stability in high power applications. Its robust wirewound construction and enamel coating ensure reliable performance, maintaining specified resistance even under sustained high wattage loads. Reviewers find this component performs exactly as expected, often outlasting cheaper alternatives in demanding environments. The core appeal centers on quality and long term value; customers accept the larger size as necessary for its high power rating. This resistor minimizes failure risk, making it a trusted standard for critical circuits where operational integrity is paramount. The consensus is clear: this component delivers consistent, high performance.
Know before you buy
The Vitreous Enamel coating provides a rugged, moisture-resistant barrier that protects the wirewound element from environmental stress and high-temperature operation. It ensures the component remains stable and durable even in demanding industrial conditions.
Yes, this is a through-hole component with an axial lead configuration. You can mount it by inserting the leads through the board and soldering them, though you should ensure your board layout can accommodate the 2.1-inch length and 20-watt heat dissipation requirements.
Because this resistor is rated for 20 watts, it will get quite hot during operation. It is best practice to mount it with adequate clearance from heat-sensitive components and to ensure there is sufficient airflow around the resistor to dissipate heat effectively.
New Old Stock refers to original, unused parts that have been held in inventory for some time. While these resistors are authentic Ohmite parts and have never been installed, you may notice minor cosmetic signs of shelf wear on the exterior coating that do not affect their electrical performance.
This is a fixed wirewound resistor designed primarily for power handling rather than high-precision signal processing. If your application requires extremely tight tolerances or low temperature coefficients, you may want to verify if the standard specifications of the B20J100 meet your circuit's specific requirements.
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