125A 3 Phase Distribution Board – 4 Way (WTPN04-125SP)
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WTPN04-125SP is the most compact model in our 125A Three Phase Distribution Board range. Supplied as standard with a 125A 4-pole main switch, an integrated Type 2 Surge Protection Device (SPD), and a 3-pole 32A MCB, it’s designed for reliable power distribution across smaller commercial, light industrial, or large...
The WTPN04-125SP is the most compact model in our 125A Three Phase Distribution Board range. Supplied as standard with a 125A 4-pole main switch, an integrated Type 2 Surge Protection Device (SPD), and a 3-pole 32A MCB, it’s designed for reliable power distribution across smaller commercial, light industrial, or large domestic three-phase installations where space and circuit count are limited.
Housed in a robust 4-way IP40 steel enclosure, the WTPN04-125SP keeps installs tidy and manageable without compromising on compliance or durability. The internal layout supports straightforward wiring and future circuit configuration using our range of MCBs and RCBOs.
Installer Tip: A solid choice for compact sites such as small workshops, plant rooms, or outbuildings where full 125A isolation, surge protection, and a dedicated outgoing MCB are required without moving to a larger enclosure.
Key Features
- 125A 4-pole main switch – full three-phase isolation and secure circuit control
- Type 2 SPD pre-installed – protects connected circuits from transient overvoltage events
- 3-pole 32A MCB included as standard – dedicated outgoing protection aligned with 125A TPN specification
- Compact 4-way steel enclosure – IP40 rated with 1.2mm construction for durability
- Accepts 6kA MCBs and RCBOs without modification
- Neutral and earth terminals fitted both sides, fully shrouded for safety
- Removable gland plate for clean, adaptable cable entry
- Manufactured in compliance with BS EN 61439-3
Compare 125A 3 Phase Distribution Board Variants
| Model | Ways | Main Device | SPD |
|---|---|---|---|
| WTPN04-125SP (This Product) | 4 | 125A 4-pole Main Switch | Type 2 SPD |
| WTPN06-125SP | 6 | 125A 4-pole Main Switch | Type 2 SPD |
| WTPN08-125SP | 8 | 125A 4-pole Main Switch | Type 2 SPD |
| WTPN12-125SP | 12 | 125A 4-pole Main Switch | Type 2 SPD |
| WTPN16-125SP | 16 | 125A 4-pole Main Switch | Type 2 SPD |
| WTPN24-125SP | 24 | 125A 4-pole Main Switch | Type 2 SPD |
Does this 4-way board include surge protection?
Yes. All WTPN boards are supplied with an integrated Type 2 SPD as standard.
Is a 3-pole MCB supplied with this board?
Yes. The WTPN04-125SP includes a 3-pole 32A MCB as part of the standard configuration.
Is this suitable for small commercial or workshop installs?
Yes. The 4-way variant is designed for compact three-phase installations where only a limited number of outgoing circuits are required.
Can I expand this later if I need more ways?
If additional capacity is required, consider the 8-way or 12-way models. We also stock extension and spreader boxes for future expansion.
Do you supply compatible breakers?
- Model: WTPN04-125SP
- Rated Current: 125A
- Ways: 4
- Main Switch: 125A 4-pole isolator
- Outgoing Protection: 3-pole 32A MCB (included)
- Surge Protection: Type 2 SPD (integrated)
- Device Compatibility: Accepts up to 6kA MCBs and RCBOs
- Construction: 1.2mm steel enclosure, IP40
- Compliance: BS EN 61439-3
- Mounting: Keyhole wall mount
This board is supplied pre-configured and ready for installation by a qualified electrician.
- Ensure SPD earthing conductors are kept as short as possible
- Confirm available wall space for the compact 4-way enclosure
- Use suitable glands with the removable gland plate for tidy cable entry
- Verify isolation and carry out full testing prior to handover
