ABBBasic M BMS
ABB catalog image for this SKU; may represent the product family.
MINIATURE CIRCUIT BREAKER
BMS313B20
SKU 2CDS633031R0205ABB BMS313B20 is a 3P miniature circuit breaker in the Basic M BMS range, rated at 20 A with a B tripping characteristic. It provides overload and short-circuit protection.
20 ARated current
3PPoles
BTrip curve
PRODUCT DATA
Technical specifications
Source: ABB product catalog.
Verified September 06, 2026.
| Rated Current (In) | 20 A |
|---|---|
| Number of Poles | 3P |
| Number of Protected Poles | 3 |
| Tripping Characteristic | B |
| Input Voltage Type | AC |
| Rated Operational Voltage | acc. to IEC 60898-1 400 V acc. to IEC 60947-2 440 V |
| Rated Short-Circuit Capacity | (AC) 3 kA (400 V AC) 3 kA (400 V) 3 kA |
| Rated Insulation Voltage (Ui) | acc. to IEC/EN 60664-1 440 V |
| Rated Impulse Withstand Voltage (Uimp) | 4 kV |
| Rated Frequency (f) | 50 / 60 Hz |
| Standards | IEC 60898-1 |
| Degree of Protection | IP20 Enclosure with Cover IP40 |
| Tightening Torque | 2 N·m |
| Product Net Width | 52.5 mm |
| Product Net Height | 88 mm |
| Product Net Depth / Length | 69 mm |
| Product Net Weight | 279 g |
For complete electrical ratings, applicable standards, connection requirements and installation instructions, consult the official ABB reference ↗.