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DLS10

Sensibly equivalent to:
AD1 CV190 CV1314
    
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The DLS10 thermal delay switch very clearly shows the construction of the switch elements. The bi-metallic strip is heated by the filament (4 V) and at the correct temperature, and pre-set time (about 15 s), the switch contacts make and power can be applied to the protected device. Normally a mercury vapour rectifier.
The 4 Volt heater suggests a 1930's origin of this design.
The balloon envelope is 43 mm in diameter and, excluding the B4 base pins, is 94 mm tall.
Reference: Datasheet.

 

Pin Connections
B4
1
2
3
4
fc
mc
h
h

 

Absolute Maximum Operating Conditions
Delay
Vh
Ah
Va
mAa
4.0
1.5
250
6,000
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 14, 2013.
shape:balloon construction:pinch type:thermal.delay.switch age:1930.1940 base:b4 heater:4.0v pin:1.fc pin:2.mc pin:3.h pin:4.h
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