Fusebox SPD1MT2 Type 2 Single-Module Surge Protection Device

This is the Fusebox SPD1MT2 Type 2 Single-Module Surge Protection Device – Compact Direct-Busbar SPD for Consumer Units available at SparksDirect.co.uk for the best price.

The Fusebox SPD1MT2 is a Type 2 Surge Protection Device (SPD) designed to protect electrical systems from harmful transient overvoltages, including surges caused by lightning strikes, grid switching, or electrical faults. It is engineered to be directly mounted on a consumer unit’s busbar without the need for an intermediate miniature circuit breaker (MCB), making it ideal for space-constrained installations.

Surge protection devices like the SPD1MT2 are essential for safeguarding sensitive electrical and electronic equipment such as computers, smart appliances, LED lighting, and entertainment systems. By diverting excess voltage safely to earth, this device helps prevent damage and extend the lifespan of connected devices.

This model is fully compliant with EN 61643-11 standards, ensuring it meets recognized performance and safety requirements for Type 2 SPDs in residential and light commercial environments.

Thanks to its compact single-module design, the SPD1MT2 frees up usable ways in the consumer unit, letting electricians maximise space without sacrificing protection. It also includes a visual status indicator that shows green when protection is active and red when replacement is needed.

Features and Benefits

• Compact single-module design – occupies minimal space in the consumer unit.
• Direct busbar connection – installs without an MCB, saving space and installation time.
• Fast surge response (<25 ns) – provides rapid protection against transient voltage events.
• MOV + GDT technology – combines Metal Oxide Varistor and Gas Discharge Tube components for reliable surge energy absorption.
• Visual status indicator – green (good) and red (replace) flag simplifies maintenance checks.
• Compatible with common earthing systems – supports TN-C-S, TN-S and TT systems.
• Space-saving and cost-effective – ideal for residential and light commercial installs.

Technical Specifications

• Brand: Fusebox
• Product Code: SPD1MT2
• Type: Type 2 Surge Protection Device
• Mounting: 35mm DIN rail, direct busbar connection (no MCB required)
• Voltage Rating (Un): 230V
• Maximum Operating Voltage (Uc): L-PE 275 V; N-PE 255 V
• Nominal Discharge Current (In 8/20 µs): 20kA
• Maximum Discharge Current (Imax 8/20 µs): 40kA
• Voltage Protection Level: L-PE ?1.5kV ; N-PE ?1.3kV
• Response Time (tA): ?25 ns
• Terminal Capacity: L: 16mm² ; N/PE: 10mm²
• Recommended Torque: L: 2.5 Nm ; N: 1.2 Nm ; PE: 1.2 Nm
• Back-Up Fuse: Max 100A fuse gG
• Short Circuit Withstand (IsccR): 25kA
• Temporary Overvoltage Withstand (UT): 335 V/5 s
• Protection Rating: IP20 (finger-safe)
• Standards: EN 61643-11 compliant
• Dimensions: 90mm (height) x 18mm (width) x 70mm (depth)
• Colour: White

Three Reasons Customers Recommend It

1. Reliable surge protection for consumer units, helping safeguard electronics and installations.
2. Easy and space-efficient installation — direct busbar mounting removes the need for an MCB, saving usable space.
3. Clear visual status indicator — simple green/red flag makes checking protection status quick and easy.

Who Needs It

• Homeowners looking to protect sensitive electronics from surges.
• Electricians and contractors upgrading or installing consumer units with surge protection.
• Light commercial premises needing compliant Type 2 SPD installation.

Who Can Install It

• Qualified electricians and electrical installers familiar with consumer units and surge protection standards.
• Must comply with local electrical regulations (e.g., UK wiring regulations) and appropriate safety standards.
• Not recommended for DIY installation unless qualified and experienced.

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