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BWH Type Resistors
0.82 ohm, for example
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here is what they look like
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You need a resistor that limits peak fault current and does not explode under this condition. Standard carbon, metal film, metal oxide, and wire wound fail with an arc/flash over, which can damage your diode string under serious fault. |
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What is required is a General-Purpose
Failsafe Molded Wirewound Resistors
These are:
Drop-in
replacement for
BWH/BWF
(L-4B, L-7)
2
watt rated with 1 watt
dimensions
±5%,
±10% tolerance
0.5
ohm to 2400 ohms
TCR's
as low as ±150 ppm/°C
standard
(custom TC's available)
Weldable
and solderable |
RESISTIVE ELEMENT
All resistor types have resistance alloy
winding on a braided fibreglass substrate. Intermediate silicone
coatings are used to enhance processibility and to provide protection to
the resistive element. |
TERMINATION
These resistors are terminated using an
alloy coated copper flashed steel lead welded to a cap of the same material.
This termination assembly is mechanically crimped, utilizing an improved
crimp design, to the resistive element. |
ENCAPSULATION
These are encapsulated utilizing
a compression molded phenolic plastic material. The SPF has a flame-resistance
coating applied over the resistive element to provide flammability
protection when destructive overloads may occur. |
MARKING
All products are marked utilizing heat
and solvent resistant color code bands consistent with EIA/MIL requirements.
The first band is double width to designate wirewound construction.
A fifth band, blue in color, is used for flameproof identification. |
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