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329

 
    
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The 329 is a barretter or current stabiliser for use on heater chains to reduce the switch-on surge and consequent damage to heaters.
This barretter has three pins and a centre tapped filament.
The single strand iron wire is looped over the support hooks that are mounted on the central glass stem. The wire is held by being clamped into a fold of the support rods.
The wide glass tube envelope is 33 mm in diameter, and excluding the B9A base pins is 96 mm tall.
Reference: Data-sheet.

 

Pin Connections
B4
1
2
3
f(1),f(2)
f(1)
f(2)

 

Absolute Maximum Operating Conditions
Stabiliser
Va
mAa
10-30
1.15
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated June 30, 2017.
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