Siemens SENTRON 3VA – Accessories – 3VA9908-0BB25
The Siemens 3VA9908-0BB25 is an undervoltage release accessory designed for SENTRON 3VA molded case circuit breakers (MCCBs). This accessory automatically trips the circuit breaker when the control voltage drops below the permissible threshold, helping protect electrical systems from unsafe low-voltage conditions and preventing unexpected equipment damage. It is engineered for use with Siemens 3VA1 and 3VA20–3VA26 MCCBs and operates on 208–230 V AC at 50/60 Hz.
The compact internal accessory design enables easy installation inside the MCCB accessory compartment while ensuring reliable operation in industrial power distribution, motor control centers, automation panels, and critical electrical infrastructure systems
Key Features
• Original Siemens SENTRON 3VA accessory
• Undervoltage release (UVR) function
• Automatically trips MCCB during voltage failure
• Operating voltage: 208–230 V AC
• Frequency: 50/60 Hz
• Compatible with 3VA1 and 3VA20–26 MCCBs
• Compact internal mounting design
• Reliable low-voltage protection
• Easy installation with coded accessory slots
• Industrial-grade operational reliability
• Suitable for automation and power distribution systems
Technical Specifications
|
Parameter |
Specification |
|
Product Model |
3VA9908-0BB25 |
|
Brand |
Siemens |
|
Product Series |
SENTRON 3VA |
|
Product Type |
Undervoltage Release (UVR) |
|
Operating Voltage |
208–230 V AC |
|
Frequency |
50/60 Hz |
|
Compatible MCCB Series |
3VA1, 3VA20–3VA26 |
|
Accessory Type |
Internal MCCB Accessory |
|
Apparent Power Consumption |
Max. 2 VA |
|
Surge Voltage Resistance |
4 kV |
|
Pollution Degree |
3 |
|
Overvoltage Category |
III |
|
Mounting Position |
Internal Accessory Compartment |
|
Connection Type |
Screw Terminal |
|
Tightening Torque |
0.4–0.5 Nm |
|
Conductor Size |
0.5–1.5 mm² |
|
Width |
25.7 mm |
|
Height |
65.1 mm |
|
Depth |
28.8 mm |
|
Net Weight |
Approx. 80–91 g |
|
Standards & Approvals |
IEC, CE, RoHS, REACH |
|
Product Lifecycle |
Active Product |
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