Siemens SENTRON 5SY4 miniature circuit breaker
5SY4340-8
SENTRON 5SY4 miniature circuit breaker, 3 pole, D-curve, 40 A, 10 kA, 400 V AC.
- Poles
- 3 pole
- Tripping curve
- D
- Rated current
- 40 A

Product specification
5SY4340-8
SENTRON 5SY4 miniature circuit breaker, 3 pole, D-curve, 40 A, 10 kA, 400 V AC.
Dimensions & specifications
All listed models are 5SY4, 10 kA. Four-pole models are 4P, not 3P+N.
Accessories & related parts
5SY4340-8 — specifications & documents
SENTRON 5SY4 miniature circuit breaker, 3 pole, D-curve, 40 A, 10 kA, 400 V AC.
| Poles | 3 |
|---|---|
| Tripping characteristic | D |
| Rated current | 40 A |
| Rated voltage | 400 V AC |
| Breaking capacity (EN 60898-1) | 10 kA |
| Series | 5SY4 |
Related parts
- 5ST3010 SENTRON auxiliary switch, 1 NO + 1 NC, for compatible 5SL, 5SY and 5SP miniature circuit breakers.
- 5ST3011 SENTRON auxiliary switch, 2 NO, for compatible 5SL, 5SY and 5SP miniature circuit breakers.
- 5ST3012 SENTRON auxiliary switch, 2 NC, for compatible 5SY4 miniature circuit breakers.
- 5ST3020 SENTRON fault signal contact, 1 NO + 1 NC, for compatible 5SY4 miniature circuit breakers.
- 5ST3021 SENTRON fault signal contact, 2 NO, for compatible 5SY4 miniature circuit breakers.
- 5ST3022 SENTRON fault signal contact, 2 NC, for compatible 5SY4 miniature circuit breakers.
- 5ST3710 SENTRON 5ST pin busbar, 3-phase, 16 mm², 1016 mm, cuttable, for 3-pole MCBs without side accessory gaps.
- 5ST3712 SENTRON 5ST pin busbar, 3-phase, 16 mm², 1016 mm, cuttable, for 3-pole MCBs with one 9 mm auxiliary/fault module per breaker.
- 5ST3030 SENTRON shunt trip, 110–415 V AC / 110–220 V DC, for compatible 5SY4 MCBs.
- 5ST3031 SENTRON shunt trip, 24–48 V AC/DC, for compatible 5SY4 MCBs.
- 5ST3043 SENTRON undervoltage release, 230 V AC, for compatible 5SY4 MCBs.
- 5ST3045 SENTRON undervoltage release, 24 V DC, for compatible 5SY4 MCBs.
- 5ST3801 SENTRON handle locking device for 5SY / 5SP4 MCBs, sealable and padlockable.
