The Siemens SENTRON 3VA9988-0BL20 is a shunt trip (auxiliary release) accessory designed for 3VA1 and 3VA20 molded-case circuit breakers up to the 3VA25 frame. It operates on a 380-600 V AC supply at 50/60 Hz, drawing a maximum apparent power of 40 VA. The part carries a 4 kV surge voltage rating (overvoltage category III, pollution degree 3), which means it withstands the transient overvoltages typical of industrial power distribution panels without flashover — relevant when the breaker sits downstream of a transformer or in a motor control center with switching surges.
Siemens 3VA9988-0BL20 Shunt Trip, 380-600 VAC, 50/60 Hz
MPN3VA9988-0BL20
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Siemens SENTRON 3VA9988-0BL20 shunt trip (auxiliary release), 380-600 V AC 50/60 Hz, 4 kV surge voltage, 40 VA, for 3VA1 and 3VA20 breakers up to 3VA25.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Product designation | Accessories |
| Accessories | Auxiliary release |
| Parameter | Value |
|---|---|
| Width | 25.7 mm |
| Height | 65.1 mm |
| Depth | 31.2 mm |
| 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 |
| Apparent power consumption (Maximum) | 40 VA |
Product details
Frequently asked questions
What is the 3VA9988-0BL20 used for?
It is a shunt trip (auxiliary release) for Siemens SENTRON 3VA1 and 3VA20 molded-case circuit breakers up to the 3VA25 frame. It allows remote tripping of the breaker by applying 380-600 V AC 50/60 Hz to the release coil.
What are the key electrical ratings of the 3VA9988-0BL20?
Rated supply 380-600 V AC 50/60 Hz, maximum apparent power draw 40 VA, surge voltage resistance 4 kV (overvoltage category III, pollution degree 3).
Does the 3VA9988-0BL20 fit a 3VA25 breaker?
Yes, the manufacturer specifies it for 3VA1 and 3VA20 breakers up to 3VA25. It occupies one of the three accessory slots on the breaker frame.
MPN
3VA9988-0BL20