The Siemens 3VA9908-0BB26 is an undervoltage release (UVR) accessory designed for SENTRON 3VA molded case circuit breakers (MCCBs). This internal accessory automatically trips the circuit breaker when the supply voltage falls below the permissible operating threshold, helping protect electrical systems from unsafe low-voltage conditions, unexpected motor restarts, and equipment damage.
The accessory is designed for use with Siemens 3VA1 and 3VA20–3VA26 MCCBs and operates on 380–400 V AC at 50/60 Hz. Its compact design allows easy installation inside the MCCB accessory compartment while ensuring reliable operation in industrial power distribution systems, MCC panels, automation systems, and switchboards
Key Features:
• Original Siemens SENTRON 3VA accessory
• Undervoltage release (UVR) functionality
• Automatically trips MCCB during voltage failure
• Operating voltage: 380–400 V AC
• Frequency: 50/60 Hz
• Compatible with 3VA1 and 3VA20–3VA26 MCCBs
• Compact internal mounting design
• Reliable low-voltage protection
• Easy installation with coded accessory slots
• Industrial-grade operational reliability
• Suitable for power distribution and automation system
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Technical Specifications
|
Parameter |
Specification |
|
Product
Model |
3VA9908-0BB26 |
|
Brand |
Siemens |
|
Product
Series |
SENTRON
3VA |
|
Product
Type |
Undervoltage
Release (UVR) |
|
Operating
Voltage |
380–400
V AC |
|
Frequency |
50/60
Hz |
|
Compatible
MCCB Series |
3VA1,
3VA20–3VA26 |
|
Accessory
Type |
Internal
MCCB Accessory |
|
Mounting
Position |
Internal
Accessory Compartment |
|
Connection
Type |
Screw
Terminal |
|
Protection
Class |
IP20 |
|
Net
Weight |
Approx.
0.081 kg |
|
Dimensions |
90 ×
124 × 41 mm (package) |
|
Standards
& Approvals |
IEC,
CE, RoHS, REACH |
|
Product
Lifecycle |
Active
Product |
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