Description
The WEG UMBW series thermal-magnetic miniature circuit breaker line includes both UL489 and UL1077 approvals to provide a solution for circuit & equipment protection in industrial electrical equipment. The UMBW has a range from 1 to 63 amps, and is available in 1,2 or 3 poles, with B, C and D trip curves.
Standard Features
- AC & DC voltages available in one series
- UL489 Branch circuit protective device
- UL1077 Equipment protection
- 17.5mm width per pole
- Visual status indication
- Positive trip-free snap action mechanism to ensure reliable switching
- Cuttable bus bar connecting system
Specifications
Manufacturer | WEG |
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Catalog Number | |
Approval | UL1077 |
Trip Curve | B 4xIn (+/-20%) Magnetic Trip Current Calibrated for resistive or non/low inductive loads Applications: Lighting, Control Circuits |
Number of Poles | 2 |
Current Rating | Amps |
UPC | |
Country of Origin | Brazil |
Technical Data
Mounting Position | Vertical Horizontal |
---|---|
Torque | 2 Nm Max 1.48 ft-lbs Max |
Cable Cross Section | 35mm sq Max 2AWG Max |
Ambient Temperature | -35°C to +70°C |
Mass | 116 grams/pole |
Protection Class | IP20 |
Mechanical Operations | 10,000 |
Vibration (sinusoidal) | +/-0.38mm (10-57Hz), 5g |
Test to IEC 60060-2-6 | 57-500Hz |
Test to Fc | 10 frequency cycles per axis |
Shock Test to IEC60068-2-27 | 30g (11ms), Test Ea |
Corrosion Test to IEC60068-2-11 | 96hrs in 5% Salt Mist, Tesk Ka |
Humidity Test to IEC60068-2-78 | 48hrs at 95% RH, Temp +40°C, Test Cab |
Terminals | Screw with Bus Bar Connections |
About

About UMBW Line
The UMBW has a range from 1 to 63 Amps, available in 1,2, 3 poles, and B, C, D trip curves. Single pole and multi-pole thermal-magnetic miniature circuit breakers (MCBs) are in accordance with EN 60947-2, UL 1077 and UL 489 for DIN rail mounting with toggle actuation, visual status indication, and high interrupt capacity. A positively trip-free snap action mechanism ensures reliable switching behavior. A range of trip characteristics and add-on accessories make the UMBW suitable for a variety of applications.
Standard Features
- AC and DC voltages available in one series;
- UL489 branch circuit protective device;
- UL1077 equipment protection;
- 17.5mm width per pole;
- Visual status indication;
- Positive trip-free snap action mechanism to ensure reliable switching;
- Cuttable bus bar connecting system.

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$19.99 | $24.99
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$19.99 | $24.99
Product title
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$19.99 | $24.99
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