Product Overview
TEPRO TM5 Aluminum Housed Chassis-Mount Wirewound Resistor - 1 ohm, 0.1%
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 deep gold anodized brick stamped TEPRO TM5 across the top line and 1 0.1% 9636 beneath it; 9636 is a stamped code, and Tepro's published data offers no reading for it. Its two mounting ears sit at diagonally opposite corners with a single bolt hole in each, the flanks are ribbed, and a flat tinned strap terminal leaves each end. Twenty-six are on the shelf at this value, sold one at a time, and this listing is named for the 5 W MIL figure rather than the 7.5 W Tepro figure.
Key Features
- Housing of the unit photographed stamped TEPRO TM5 with 1 0.1% 9636, giving 1 ohm at 0.1% 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 name here follows the 5 W MIL figure
- Both published figures assume full power at 25 degC with the housing mounted 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 are +/-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, insulation resistance 10000 Mohm minimum (Tepro published TM data)
- Tinned copper flattened-and-pierced terminals on TM-5 through TM-50, environmental test basis MIL-R-18546 (Tepro published TM data)
- Verify against Tepro's published TM series data before designing in.
Applications
- Current sense and shunt legs in power supplies and drives
- Bench dummy loads and burn-in fixtures
- Snubber and damping networks bolted to a panel
- Instrument and industrial control chassis
Frequently Asked Questions
How many should I order?
Order the count the build needs. Twenty-six of this value are on the shelf, sold one at a time rather than in fixed packs, which covers a small run plus spares out of one 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.
What does it need to be bolted to?
Tepro's published TM data gives the recommended heat sink for the TM-5 and TM-10 as a 6 x 4 x 2 x .040 in aluminum chassis and states that those two sizes need no derating up to 75 degC ambient. Both published power figures assume that kind of mounting, so bolt the housing flat to metal rather than leaving it in free air. The unit photographed has one bolt hole in each of its two ears, so it lands with two screws; what ships is the resistor itself, sold each.
Bolt it to the chassis and the heat goes where it should, quietly, for as long as the box lives.
