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Siemens 3VA9908-0BB14 — Circuit Breaker Accessories

Siemens 3VA9908-0BB14 SENTRON Undervoltage Release, 125-127

MPN3VA9908-0BB14

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Siemens SENTRON, undervoltage release accessory, 3VA9908-0BB14, 125-127 V DC, 2.5 W, IP20, 28.8 mm depth, 25.7 mm width, 65.1 mm height.

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Siemens 3VA9908-0BB14 datasheet (PDF)

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3VA9908-0BB14 — Identification
Parameter	Value
Product designation	Accessories
Accessories	Auxiliary release

3VA9908-0BB14 — Mechanical
Parameter	Value
Width	25.7 mm
Height	65.1 mm
Depth	28.8 mm

3VA9908-0BB14 — Other specifications
Parameter	Value
Number of slots	3
Stripped length	10 mm
Degree of pollution	3
Overvoltage category	III
Stripped length [In]	0.4 in
Design of the product	auxiliary release
Surge voltage resistance	4 kV
Consumed active power (at DC, maximum)	2.5 W

Product details

The Siemens SENTRON 3VA9908-0BB14 is an undervoltage release accessory designed for 3VA1 and 3VA20 through 3VA25 molded-case circuit breakers. The release is rated for 125-127 V DC and consumes a maximum of 2.5 W. Surge voltage resistance is 4 kV.

This auxiliary release occupies three slots in the breaker's accessory bay. Dimensions are 28.8 mm deep, 25.7 mm wide, and 65.1 mm high — it fits within the standard SENTRON breaker footprint, so no additional DIN-rail space is consumed. The stripped length for wiring is 10 mm (0.4 in).

Frequently asked questions

What is the 3VA9908-0BB14 used for?

It is an undervoltage release for Siemens SENTRON 3VA1 and 3VA20 through 3VA25 breakers, tripping the breaker when the DC control voltage drops below the rated 125-127 V DC threshold.