



MK Masterseal 56891BLK Black 1 Way 1 Module Single Pole Modular Switch IP56 20A
56891BLK
MK Masterseal 56891BLK 20A Modular Switch – 1 Way, Single Pole, IP56 Black for Demanding Installations
The MK Masterseal 56891BLK is a 20A 1-way single pole modular switch, ideal for high-load switching in harsh or outdoor environments. Designed exclusively for MK Masterseal enclosures, this IP56-rated switch performs reliably with no de-rating required for fluorescent or inductive loads, making it a trusted choice for professionals.
- 20A High Load Capacity: Suitable for heavier-duty switching applications in industrial, workshop, or farm settings.
- IP56 Protection: Sealed against strong water jets and dust, ensuring performance in outdoor and exposed environments.
- No De-Rating Needed: Fully rated for use with fluorescent and inductive loads without capacity loss.
- Built for Durability: Manufactured from UV-stable polycarbonate that resists cracking, fading, and impact damage.
- Masterseal Compatible: For use only with MK Masterseal enclosures, ensuring a complete weatherproof installation.
Technical Specification
- Product Type: Modular switch
- Current Rating: 20A
- Switch Type: 1 way, single pole
- IP Rating: IP56
- Standards: BS EN 60669-1:2000
✅ Choose the MK 56891BLK for safe, high-capacity switching – designed to perform reliably in the most challenging environments!

Ean Code | 5017490253347 |
Range | Masterseal |
Product | Gridswitch Module |
Type | Single Pole Module |
Ingress Protection | IP66 |
Number Of Gangs | 1 |
Pole Configuration | Single Pole |
Current Rating | 20 A |
Standards | BS EN 60669-1 |
Face Colour | Black |
Ways | 1 Way |
Rocker Colour | White |
Switched/unswitched | Switched |
Delivery Options:
- PRIORITY DELIVERY – Next Working Day (All items in stock and ordered before 3 pm) - £7.08 inc-VAT. (£5.90 ex-VAT)
- Orders Over £100 (before VAT): We offer free standard shipping on all orders shipped to UK mainland addresses
- Orders under £100 (before VAT): Our standard delivery fee to UK mainland addresses is £5.90 ex-VAT (£7.08 inc-VAT)
*Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £12 ex-VAT for all orders (Prices subject to change).
Items requiring specialist shipping:
- Orders containing Solar Panels, Batteries and/or Inverters: Up to 50 qty will be dispatched on a pallet and incur a £120 ex-VAT delivery charge**.
**Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £180 ex-VAT (Prices subject to change).
Contact us if you have any further questions.