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Siemens 3VA9908-0BB11 — Circuit Breaker Accessories

Siemens 3VA9908-0BB11 Undervoltage Release, 24 V DC, SENTRON

MPN3VA9908-0BB11

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Siemens SENTRON 3VA9908-0BB11 undervoltage release, 24 V DC, auxiliary release accessory for 3VA1 and 3VA20 up to 3VA25 circuit breakers, 28.8 mm depth, 25.7 mm width, 65.1 mm height.

$45.72Ref. price · indicative, final on quote

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Siemens 3VA9908-0BB11 datasheet (PDF)

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

Specifications

3VA9908-0BB11 — Identification
Parameter	Value
Product designation	Accessories
Accessories	Auxiliary release

3VA9908-0BB11 — Mechanical
Parameter	Value
Width	25.7 mm
Height	65.1 mm
Depth	28.8 mm

3VA9908-0BB11 — 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

Undervoltage release for 3VA breakers

When the control voltage drops below the release threshold, the 3VA9908-0BB11 trips the breaker — this is the standard undervoltage protection function that prevents automatic reclosure after a supply dip. It draws a maximum consumed active power of 2.5 W at DC.

Fit and wiring constraints

Rated for overvoltage category III with a surge voltage resistance of 4 kV and pollution degree 3, the release is suitable for fixed-installation distribution panels where transient overvoltages are expected.

Frequently asked questions

Is 3VA9908-0BB11 compatible with 3VA2 breakers?

Yes, the 3VA9908-0BB11 is designed as an undervoltage release accessory for 3VA1 and 3VA20 up to 3VA25 circuit breakers, which includes the 3VA2 family.

What is an undervoltage release for a circuit breaker?

An undervoltage release is an accessory that trips a circuit breaker when the control voltage falls below a set threshold. The 3VA9908-0BB11 operates on 24 V DC and prevents automatic reclosure after a supply dip, protecting downstream equipment from undervoltage conditions.