Product Overview
TEPRO TM Aluminum Chassis-Mount Wirewound Resistor - 2 ohm, 5 W
Condition
Unused, New Old Stock. The photo shows a representative unit from our stock.
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Product Overview
The TM line is Tepro's aluminum housed, chassis-mount precision power wirewound family, an anodized housing over a steatite or alumina core with an epoxy-protected winding and a high-temperature silicone seal, per Tepro's published TM series data. The unit photographed is a pale champagne-gold housing stamped TEPRO TM 5W on the top line and 2 1% 8939 beneath it; 8939 is a stamped code, and Tepro's published data offers no reading for it. The tolerance on this body reads 1%, and this listing is written to that marking. Ribbed flanks, two diagonally opposite mounting ears with one bolt hole each, a flat tinned strap out of each end, and twenty-two on the shelf at this value, sold one at a time.
Key Features
- Housing of the unit photographed stamped TEPRO TM 5W with 2 1% 8939, giving 2 ohm at 1% tolerance
- Tepro's published TM data rates the TM 5 at 7.5 W on Tepro's own rating basis and 5 W on the MIL basis; the housing here carries the 5W marking
- Published ratings assume full power at 25 degC with the housing on a proper heat sink, 275 degC maximum hotspot, 1% maximum delta-R over 1000 h load life (Tepro published TM data)
- TM standard tolerances run +/-0.1% to 5%, with closer tolerances to 0.01% available (Tepro published TM data)
- Temperature coefficient +/-50 ppm across the 1 to 9.9 ohm range, where this value sits (Tepro published TM data)
- Dielectric strength 1000 VAC on TM-5, TM-10 and TM-25, insulation resistance 10000 Mohm minimum, environmental test basis MIL-R-18546 (Tepro published TM data)
- Verify against Tepro's published TM series data before designing in.
Applications
- Shunt and current sense legs in power supplies and motor drives
- Snubber and damping networks in power stages
- Load and dummy load positions in test setups
- Panel or heatsink mounted spots in industrial control gear
Frequently Asked Questions
How many should I order?
Order the count the build needs. Twenty-two of this value are on the shelf, sold one at a time rather than in fixed packs, so a small run and its spares come out of a single order. Shipping is $8 flat rate and free on orders over $28, so small parts like this ship smartest as part of a larger order.
How do the terminals attach?
Tepro's published TM data describes tinned copper flattened-and-pierced terminals on the TM-5 through TM-50 sizes, with threaded terminals reserved for the larger TM-100 and TM-250. On the unit photographed both terminals are plain flat straps and no pierce hole is visible in the photos. Either way the published terminal style at this size is flat rather than threaded, so plan on soldering or crimping to a flat tab rather than landing a nut on a stud.
A small gold brick that takes the current you push at it and hands back the same number every time you check.
