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ED520-1 Double-Pole Single-Throw 500A Emergency Stop Switch

ED520-1 Double-Pole Single-Throw 500A Emergency Stop Switch
ED520-1 Double-Pole Single-Throw 500A Emergency Stop Switch
ED520-1 Double-Pole Single-Throw 500A Emergency Stop Switch
£358.32 Excl. VAT
(£429.98 Inc. VAT)
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Despatch: 8 to 10 Weeks
Bar Code
Part Number
60V DC Max.
1.90 kg

 Pre-orders and back-ordering are available for all Albright brand out-of-stock items, with a current lead time of approximately 8 to 10 weeks despatch.

  • Ordering more Albright brand products than is shown in stock will put your order into a backorder process.
  • Request "Ship all available" in the order comments section if you order more units than are available.

 Telephone: +44 (0) 1924 823119 or Email us to discuss further requirements.

 The Albright ED520-1 500A heavy-duty battery load breaker has been designed to provide a rapid means of disconnecting batteries or other power supplies in the event of serious electrical faults.

  • Whilst the switches are primarily intended for use with battery-powered vehicles, they are also suitable for use with static power systems.
  • All types are capable of safely rupturing full-load battery currents in the event of an emergency.
  • Rated: 500 Amps, 60Vdc maximum.
  • Double-Pole, Single-Throw (DPST).
  • Two M5 fixing screws at 48mm centres.
  • 10.5mm diameter holes for M10 Hex bolts for battery cable fixing.
  • Suitable for voltages up to 60 Volts DC, typically electric vehicle systems.
For a lockable version use ED402L-2

About The Albright ED520 Stop Switches

 The ED520 is a manually operated device with an over-centre spring mechanism that provides a snap action for both the opening and closing of the main contacts. The ED520 is easy to install and is secured with supplied M5 Posidrive mounting screws.

Uninterrupted Current: No or infrequent load switching requirements (maintains a lower contact resistance).


 The switch is to be used to rupture current in an emergency or as a no-load isolator. Do not use as a regular On-Load Switching Device.

The Use of Battery Disconnecting Switches in Electric Vehicles

 Modern battery-powered electric vehicles are inherently very reliable and safe. However, even when sophisticated electronic controllers are used it is desirable to have a means of disconnecting the battery in the event of an emergency, such as a vehicle failing to stop or an electrical short circuit.

 In many countries, it is mandatory to fit one or more devices to achieve an emergency disconnection of the battery.


Device Type DPST Stop Switch
Thermal Current Rating (Ith) 500 Amps
Intermittent Current Rating 30% Duty 915A
40% Duty 790A
50% Duty 705A
60% Duty 645A
70% Duty 600A
Overload Currents
that can be Ruptured
750A at 60V D.C.
Maximum Recommended
Contact Voltage
60V D.C.
Mechanical Durability >10 x 10³ Cycles
Typical Voltage Drop Per Pole
Across New Contacts At 500A
20 - 50mV
Operating Ambient Temperature -40 to +60℃
Weight 1800g


UK Mainland Postage Offer

Delivery Options Our Free UK Mainland Postage and Packaging Service offers unbeatable value for money. The free UK Standard shipping is automatically applied to your shopping cart page with no additional cost when you reach the £50.00 minimum order value.

 We use Royal Mail Standard or Recorded Delivery for light, low-value orders and we use FedEx, UPS, Parcel Force, and other major courier services for larger and more valuable consignments.

International Consignments

 Our international customers will need to provide the exact Card Holder Address (Invoicee) as the first address for payment processing. Please note that PO Box addresses are not acceptable as delivery addresses by some couriers. All export orders must be placed and paid for online. Proforma Bank Transfer IBAN and SWIFT payment methods are available to create online.

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