Single pole and multi-pole thermal-magnetic miniature circuit breakers (MCBs) 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.
Features
Features
- 1, 2, 3 poles and B, C, D trip curves available
- AC and DC voltages available in one series
- Compact 17.5mm width per pole
- DIN rail mountable
- Alarm and vision status indication
- Positive trip-free snap action mechanism to ensure reliable switching
- Cuttable bus bar connecting system
Accessories
Accessories
- Auxiliary contact blocks
- Bell alarms for visual and alarm indication
- Shunt trip release
- Bus bars
Mechanical Ratings
Mechanical Ratings
| Tripping Curves | B,C,D |
|---|---|
| Number of Poles | 1,2,3 |
| Mounting Position | Vertical, Horizontal |
| Torque | 2 Nm, 1.48 ft lbs Maximum |
| Cable Cross Section | 35mm sq, 2 Awg Maximum |
| Ambient Temperature | -35 deg C to +70 deg C |
| Mass |
UL1077 - 116 grams per pole UL489 - 131 grams per pole |
| Protection Class | IP20 |
| Mechanical Operations | 10,000 |
| Vibration (sinusoidal) | +/- .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, Test Ea | 30g (11ms) |
| Corrosion Test to IEC60068-2-11 Test Ka | 96hrs in 5% salt mist |
| Humidity Test to IEC60068-2-78 Test Cab | 48hrs at 95% RH, Temp +40 deg C |
| Terminals | Screw with Bus Bar Connections |