A Type Time Delay RCD – 63A 100mA, 4 Pole (WARTD463-100)
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
Secure Payments With
The WARTD463-100 A-Type 100mA Time Delay RCD is a 4 Pole S-Type device rated at 63A. Its built-in time delay ensures upstream discrimination, allowing downstream RCDs to trip first and preventing unnecessary power loss. Ideal for three-phase distribution boards, EV charging hubs, and renewable installs where selective coordination is essential....
The WARTD463-100 A-Type 100mA Time Delay RCD is a 4 Pole S-Type device rated at 63A. Its built-in time delay ensures upstream discrimination, allowing downstream RCDs to trip first and preventing unnecessary power loss. Ideal for three-phase distribution boards, EV charging hubs, and renewable installs where selective coordination is essential. Fully compliant with BS EN 61008-1 and the 18th Edition Wiring Regulations.
Installer Tip: Use 4 Pole time delay RCDs when protecting three-phase circuits or boards with both line and neutral conductors. Never use time delay devices on final circuits directly.
Key Features
- 4 Pole A-Type RCD – full disconnection of line + neutral
- Time delay (S-Type) – ensures upstream coordination
- 63A rated current – suited for small to mid-sized three-phase boards
- Sensitivity: 100mA (30mA & 300mA options also available)
- DIN-rail mountable – compact 72mm unit
- Standards: BS EN 61008-1, 18th Edition compliant
Compare Time Delay RCD Variants
| Model | Poles | Rated Current | Sensitivity | Type |
|---|---|---|---|---|
| WARTD463-100 (This Product) | 4 Pole | 63A | 100mA | A-Type, Time Delay (S-Type) |
| WARTD480-100 | 4 Pole | 80A | 100mA | A-Type, Time Delay (S-Type) |
| WARTD4100-100 | 4 Pole | 100A | 100mA | A-Type, Time Delay (S-Type) |
Where is the WARTD463-100 most commonly used?
It’s suited for upstream protection in smaller three-phase boards, EV charging sites, or renewable installs requiring selective coordination.
Why use a time delay RCD instead of a standard RCD?
A time delay RCD allows downstream RCDs to trip first, preventing nuisance outages across unaffected circuits.
Is this compliant with UK regulations?
Yes – it complies with BS EN 61008-1 and the 18th Edition Wiring Regulations (Amendment 2).
Does this RCD cover surge protection?
No – surge protection requires a dedicated SPD installed alongside the RCD.
- Product Code: WARTD463-100
- Type: A-Type (S-Type) Time Delay RCD
- Rated Current: 63A
- Sensitivity: 100mA (also available 30mA / 300mA)
- Poles: 4 Pole
- Voltage: 400V AC, 50Hz
- Breaking Capacity: 6kA
- Mechanical Endurance: 4000 cycles
- Electrical Endurance: 2000 cycles
- Ingress Protection: IP20
- Module Width: 72mm
- Dimensions: 72 × 82 × 70mm
- Standards: BS EN 61008-1
- Terminal Torque: 2.5Nm
The WARTD463-100 should only be installed as an upstream device in coordinated RCD systems. It provides delayed tripping for three-phase circuits where discrimination is essential.
- Mount to DIN rail in approved enclosures
- Use for 63A-rated three-phase loads
- Apply correct torque (2.5Nm) to terminals
- Never use on final circuits directly
- Installation by a qualified electrician only
