MCB Blank Filler — Consumer Unit Blanking Piece

MCB Blank Filler — Consumer Unit Blanking Piece

The MCB Blank Filler is a DIN rail blanking module designed to seal unused ways in consumer units and distribution boards. Manufactured to fit standard 18mm-wide module slots, this blanking piece ensures your consumer unit enclosure remains compliant, safe and visually tidy. Every unused way in a consumer unit should be fitted with a blank filler to prevent accidental contact with live busbars and to maintain the IP rating of the enclosure.

blanking modules are moulded from flame-retardant, self-extinguishing thermoplastic and snap securely onto the busbar without tools. They are compatible with all consumer units and most standard DIN rail boards used in UK domestic and commercial electrical installations.

Key Features

• Standard 18mm (1-module) width — fits all consumer units and most standard UK boards
• Snap-on busbar fitting — installs without tools in seconds
• Flame-retardant thermoplastic construction — self-extinguishing to UL94 V-0
• Maintains enclosure IP rating by sealing unused module openings
• Prevents accidental contact with live busbars in unused ways
• White finish to match consumer unit fascia
• Sold individually — ideal for stocking in bulk for installation vans

Technical Specification

Compliance & Certification

• Suitable for use in installations compliant with BS 7671 (18th Edition IET Wiring Regulations)
• Flame-retardant to UL94 V-0
• Designed and supplied Technologies Limited, UK

Installation Notes

Always isolate the supply before opening a consumer unit. Fit a blank filler into every unused way to maintain the safety and IP rating of the enclosure. The module snaps directly onto the busbar — no tools required. Ensure the blank is seated flush with adjacent MCBs or RCBOs for a neat, professional finish.