- HIGH ACCURACY
- LOW TEMPERATURE COEFFICIENTS
- HIGH IMMUNITY FROM ENVIRONMENTAL EFFECTS
- HIGH RELIABILITY – FROM 0.01 Ω TO 10 MΩ
- BY SPECIAL ORDER ONLY
- PRECISION HIGH POWER RESISTORS AVAILABLE
Ohm-Labs’ can supply critical resistor components to customers who require the highest quality and reliability.
Our acquisition of Leeds & Northrup’s, Honeywell’s and Julie Research Labs’ resistor manufacturing materials and wire allows us to continue to offer wire wound resistors using these designs and materials.
Ohm-Labs can supply and support all of L&N, Honeywell and Julie Research Labs resistor products. Please provide us with their OEM part number for a quotation.
To specify precision resistors, please refer to the chart below.
- First, select the type: either ‘R’ (epoxy encapsulated), ‘H’ (hermetically sealed and oil filled), or ‘T’ (top hat, or radial lead).
- Then, select the desired size (diameter and length) – recommended sizes for small resistors are R24 & R32, for larger resistors R44, R46 or R48 (or H type).
- Specify 2-wire or 4- wire construction (4-wire is recommended below 10 ohms).
- Specify your desired accuracy and TCR (Temperature Coefficient of Resistance).
- Finally, specify the resistance.
- Smaller resistors <34 size are typically 1/2 W; 44 and larger size are typically 1 W.
- For higher power, specify -HK heat sink type.
Examples
- R462DC-1M = Epoxy ½” x 1.5″ 2-wire 0.01% 5 ppm TCR 1 Meg
- H484AD-1 = Oil filled ½” x 2″ 4-wire 0.1% 3 ppm TCR 1 Ohm
- T422BB-25.5 = Radial ½” x ½” 2-wire 0.05% 10 ppm TCR 25.5
Precision Power Resistors – HK Heat Sink Type
- H484DC-[ohms]-HK are heat sink mounted precision power resistors
- Common values range from 0.1 to 100 ohms
Please note that due to wire size restrictions, not all resistance values are available in all sizes.
Ohm-Labs can manufacture custom-matched resistor sets for precision ratio applications.