Product guide

CRCFSUK-A0056-1-EU Battery Isolator Switch, 250A

CRCFSUK-A0056-1-EU: The CRCFSUK battery isolator switch is a manual ON-OFF disconnect listed for vehicle and battery-bank use. Its clamp-on installation is described for standard top-post batteries with a negative post measuring 15.5-17mm, while the listing gives inconsistent voltage and current details that buyers should resolve before use.

At a glance

Manual two-position ON-OFF isolation for disconnecting a battery when equipment is stored or undergoing maintenance.
The listing describes direct installation on the negative post of a standard top-post battery measuring 15.5-17mm, without panel cut-outs.
Manufacturer copy says the switch is intended for DC systems and vehicle types including cars, boats, trucks, RVs, ATVs and UTVs.

Price

£9.99Save 23%

Reference price: ~~£12.99~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

Direct negative-post installation may suit buyers who want a battery-mounted switch rather than a separate panel control.
Manual ON-OFF operation provides a simple way to disconnect the battery during storage or maintenance.

Technical specifications

22 specifications

Identity
Brand	CRCFSUK
Model	CRCFSUK-A0056-1-EU
Switch type	Kill Switch
Operation mode	ON-OFF
Number of positions	2
Circuit type	2-way
Control type	Manual

Electrical
Current rating	250 Amps
Operating voltage	12 Volts
Contact type	Normally Open
Connector type	Crimp
Terminal type	Spade

Dimensions and installation
Mounting type listed	Surface Mount
Dimensions listed	6.2 x 5.2 x 15 centimetres

Materials and protection
Material listed	Copper Nylon
Contact material	Copper
Ingress protection rating	IP67
Upper temperature rating	90 Degrees Celsius
Specification met	CE

Compatibility and origin
Compatible vehicle types listed	Car, Marine, Boat, RV, Camper, Travel Trailer, Truck, ATV, UTV
Compatible devices listed	Car, Boat, RV, Camper, Travel Trailer, Truck, ATV, UTV, Battery banks, Electrical equipment
Country of origin	China

What to know before buying

Listing details to confirm

Listing details are contradictory or unconfirmed: the title and feature copy claim 12-48V operation, but the technical details list 12 Volts. Current is given as 250 Amps in the title and details, while the descriptive copy specifies 250A DC continuous and 1000A DC cranking. Confirm the applicable voltage and current ratings for your system before purchase. The listing also describes direct negative-post clamp installation but separately lists Surface Mount, and specifies Copper Nylon as the material while the feature copy calls the housing ABS plastic. Its stated fit is for a standard top-post battery with a 15.5-17mm negative post.

What’s in the box

1 x Battery Disconnect SwitchIncluded
Pre-fitted negative battery clamp and tapered output postCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Vehicle, marine or battery-bank owners seeking a manually operated battery disconnect for storage or maintenance.
Buyers whose battery has a standard top post with a negative post within the stated 15.5-17mm range.

Less suited to

Buyers who need confirmed electrical ratings for a system without first resolving the conflicting voltage and current claims.
Installations that require a verified surface-mounted panel switch or confirmed housing material.

Customer reviews on Amazon

5 / 5 · 2 ratings

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Only aggregate ratings are supplied, with a very small sample and all ratings in the five-star category. This is limited evidence and does not establish specific customer experiences or resolve the listing's conflicting installation and electrical details.

Frequently asked questions

What voltage is this switch rated for?

The title and feature copy state 12-48V DC, while the technical details list 12 Volts. Confirm the suitable rating with the selected listing before using it on a particular system.

What current can it handle?

The title and details list 250 Amps. The descriptive copy says 250A DC continuous and 1000A DC cranking, so confirm which figures apply to your installation.

How does it install?

The listing describes fitting it directly to a standard top-post battery's negative post, specified as 15.5-17mm. It separately lists Surface Mount, so clarify the intended mounting arrangement if that matters.

What is included?

The stated contents list includes one battery disconnect switch. The feature copy also claims a pre-fitted negative battery clamp and tapered output post.