18739-4P-63A
Schneider 4-pole thermal-magnetic miniature 18739 4P-63A
Schneider Electric
Schneider 4-pole thermal-magnetic miniature 18739 4P-63A
['Home', 'Circuit Protection', 'Miniature Circuit Breakers', 'Schneider 18739 NG125H'] Need Schneider 18739 4P-63A? 4-p…
Specifications
| Brand | Schneider Electric |
|---|---|
| Model Number | 18739 (NG125H) |
| Official Product Name | Acti9 NG125H Miniature Circuit Breaker |
| Applicable System | Distribution boards and industrial power distribution |
| Product Type | 4-pole thermal-magnetic miniature circuit breaker (MCB) |
| Equivalent Standard | Available on request |
| Product Status | Active / Available |
| Poles | 4P (4 protected poles) |
| Trip unit | Thermal-magnetic, Type C curve |
| Breaking capacity Icu | 36 kA at 380-415 V AC (IEC 60947-2) |
| Rated operational voltage Ue | 380-415 V AC (also 500 V AC) |
| Rated insulation voltage Ui | 690 V AC |
| Rated impulse withstand voltage Uimp | 8 kV |
| Magnetic tripping limit | 8 x In +/- 20% |
| Utilisation category | Category A (IEC 60947-2) |
| Suitability for isolation | Yes (IEC 60947-2) |
| Standards | EN/IEC 60947-2 |
| Mounting | Clip-on 35 mm symmetrical DIN rail |
| Dimensions (H x W x D) | 103 x 108 x 81 mm |
| Net weight | 0.96 kg |
| Mechanical durability | 20000 cycles |
| Electrical durability | 10000 cycles |
| IP rating | IP20 |
| Operating temperature | -30 to +70 deg C |
| Country of origin | France |
| Rated current In | 63 A at 40 deg C |
Product Description
Suitable for isolation, it mounts on a 35 mm symmetrical DIN rail and protects distribution boards and industrial power circuits against short-circuit and overload currents. The Schneider Electric 18739 is an Acti9 NG125H miniature circuit breaker: a 4-pole thermal-magnetic device rated 63 A at 40 deg C with a Type C trip curve and a high breaking capacity of 36 kA at 380-415 V AC per IEC 60947-2.
Basic Product Information
- High breaking capacity of 36 kA at 380-415 V AC (IEC 60947-2)
- Rated 63 A at 40 deg C with 690 V insulation voltage
- Suitable for isolation per IEC 60947-2
- Clip-on 35 mm symmetrical DIN rail mounting
- Padlockable toggle with trip indication
- 4-pole thermal-magnetic trip unit with Type C curve
Technical Specifications
Version & Model Difference
- [{'item': 'Range', 'value': 'Acti9 NG125H high-breaking-capacity series'}, {'item': 'Curve', 'value': 'Type C; also offered in B and D curves within the NG125 family'}]
Application Scenarios
- Short-circuit and overload protection in distribution boards
- Industrial and commercial power distribution
- Motor and HVAC circuit protection
- Isolation of electrical circuits
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Frequently Asked Questions
What is the breaking capacity of Schneider 18739?
The NG125H miniature circuit breaker offers a breaking capacity of 36 kA at 380-415 V AC according to IEC 60947-2, with a rated current of 63 A.
What trip curve does it use?
It uses a thermal-magnetic Type C curve, suitable for general commercial and industrial distribution with moderate inrush currents.
Can it be used for isolation?
Yes. The device is suitable for isolation per IEC 60947-2 and mounts on a 35 mm symmetrical DIN rail.
What are its dimensions and weight?
It measures 103 x 108 x 81 mm and weighs 0.96 kg, with an IP20 rating and operating range of -30 to +70 deg C.
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