Product Overview
TEPRO TS Axial Precision Power Wirewound Resistor - 4 Ohm, 1 W, 0.1%
Condition
New. The photo shows a representative unit from our stock.
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Product Overview
The TS line is Tepro's silicone-protected axial precision power wirewound family, a steatite or alumina core wound with copper-nickel or nickel-chrome and sealed with high-temperature silicone, per Tepro's published TS series data. The unit photographed is a charcoal black body with tapered shoulders, printed in white on four lines, TEPRO on top, TS 1W beneath it, then 4 and 0.1% stacked below that. The leads are plain silver wire, straight and full length on both sides, and one frame lays the part on a light crinkled backdrop beside a yellow handwritten sticky note reading TEPRO, TS 1W, 4, 0.1%. No four-digit stamped code is visible in these photos. Five are on the shelf at this value, sold one at a time.
Key Features
- Body of the unit photographed printed TEPRO TS 1W with 4 and 0.1% beneath, giving 4 ohm at 0.1% tolerance
- Power: 1 W. Tepro's published TS data lists the 1 W types as TS1A covering 0.01 to 10K ohm, and TSA1 and TS1 covering 0.01 to 20K ohm
- Temperature coefficient +/-50 ppm across the 1 to 9.9 ohm band, where 4 ohm sits (Tepro published TS data)
- Standard TS tolerances run 0.05% to 5%, with 0.01% available on most types as a variation, so the printed percentage is the resistance tolerance and not a letter code (Tepro published TS data)
- Construction: steatite or alumina core, copper-nickel or nickel-chrome winding as the resistance requires, high-temperature silicone sealant, tinned copper-weld standard terminals (Tepro published TS data)
- Rating basis characteristic U, 275 degC maximum hotspot, 0.5% maximum delta-R over 2000 h load life; the TS.5 through TS2 sizes run full power to 170 degC ambient without derating (Tepro published TS data)
- Short-time overload 5 s at 5x rated power on types of 3 W and below; dielectric strength 500 VAC on TS.125 through TS3, insulation resistance 1000 Mohm minimum (Tepro published TS data)
- Verify against Tepro's published TS series data before designing in.
Applications
- Bridge arms, calibration networks and reference dividers
- Precision sense and shunt positions in instrumentation
- Gain-setting legs in analog signal chains
- Repair and restoration of legacy precision test gear
Frequently Asked Questions
How many should I order?
Order the count the build needs. Five of this value are on the shelf, sold one at a time rather than in fixed packs, so a divider leg 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 is the 4 ohm value marked on the body?
As a plain 4, printed on its own line between TS 1W and 0.1%, with no R or K multiplier letter anywhere on the body. Tepro's published TS data lists tolerances only as percentages and publishes no letter-key for the series, so the 0.1% below it reads exactly as printed rather than being decoded. The leads on the unit photographed are full length and straight, so plan on trimming them to your board rather than dropping in a preformed lead pitch.
Four ohms, three printed lines, and a sticky note repeating all of it in pen.
