# LEGRAND S 303 B4 DX | Circuit breaker; 400VAC; Inom: 4A; Poles: 3; for DIN rail mounting

**Manufacturer:** LEGRAND  
**MPN:** `S 303 B4 DX`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | LEGRAND |
| Manufacturer name | LEGRAND |
| Manufacturer | LEGRAND |
| CategoryL1 | Fuses and Circuit Breakers |
| CategoryL2 | Circuit Breakers |
| CategoryL3 | Circuit Breakers |
| Extra Product Name | LEGRAND S 303 B4 DX \| Circuit breaker; 400VAC; Inom: 4A; Poles: 3; for DIN rail mounting |
| atoms | 1 |
| jsonUrlData | 549372d6cf8ed27cfca1887ad343fa8b. |
| jsonUrlData2 | 16c82c4be6d7cc656f34 |
| keywords | LEGRAND, S 303 B4 DX, 407557, Fuses and Circuit Breakers, Circuit Breakers |
| moq | 1 |
| MPN | S 303 B4 DX |
| multiple | 1 |
| qtyInStock | 0 |
| SKU | 407557 |
| snippet | LEGRAND S 303 B4 DX \| Circuit breaker; 400VAC; Inom: 4A; Poles: 3; for DIN rail mountin |
| tierMinQty1 | 1 |
| tierMinQty2 | 5 |
| tierMinQty3 | 10 |
| tierPrice1 | 40.95 |
| tierPrice2 | 38.13 |
| tierPrice3 | 35.57 |
| Type of protection | circuit breaker |
| Current rating | 4A |
| Number of poles | 3 |
| Mounting | for DIN rail mounting |
| Characteristics | B |
| Short circuit breaking capacity | 6kA |
| IP rating | IP20 |
| Cross section of connecting wires | 1...35mm |
| Operating temperature | -25...70?C |
| Mechanical durability | 20000 cycles |
| Electrical life | 10000 cycles |
| Conform to the norm | IEC EN 60898-1 |
| Manufacturer series | S300 DX |
| Trade name | MCB |
| Rated voltage | 400V AC |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| TME | 407557 | 40.95 | 1 | None | 1 |

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