A family of three thermal protectors from Selco Products offers high-reliability
overheat protection, automatic reset, a dual-spring-mechanism design,
and sharp "snap-action" sound when activated. The dual-spring design
includes strong shock and vibration resistance to ensure extremely stable
contact performance.
The JP7 targets ac equipment in harsh industrial conditions (see figure). It comes in a 17.0- by
7.3- by 3.9-mm package and an operating temperature set range from 75°C to
150°C. The EP2 devices feature the same mechanical design as the JP7 but employ
a different casing material designed specifically for protecting low-voltage dc equipment.
The temperature set point range is
from 75°C to 130°C.
The BP thermal protectors are for
rechargeable battery packs. They automatically
turn off the voltage if the batteries
overheat. The BP series comes in four configurations
that handle a wide variety of
battery types, including nickel cadmium,
lithium-ion, and nickel metal hydride.
All of the configurations have a differential temperature of 46°C or higher. Their
operating set range is from 70°C to 100°C. Standard list price for the thermal protectors
is $2.60 each in quantities of 1000. Delivery is in four to six weeks.
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