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SD150A-54 Albright 24V On-Off Single-pole Emergency Stop Switch - Continuous

SD150A-54 Albright 24V On-Off Single-pole Emergency Stop Switch - Continuous
SD150A-54 Albright 24V On-Off Single-pole Emergency Stop Switch - Continuous
SD150A-54 Albright 24V On-Off Single-pole Emergency Stop Switch - Continuous
SD150A-54 Albright 24V On-Off Single-pole Emergency Stop Switch - Continuous
£87.83 Excl. VAT
(£105.40 Inc. VAT)
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Despatch: 8 to 10 Weeks
Bar Code
Part Number
24V DC
Coil type
570 g

 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.

 Heavy-duty Albright International 24Vdc continuous coil emergency battery disconnect switch with auxiliary.

  • Rated 150A, 24Vdc, continuous coil.
  • Single pole.
  • Internal fixing screws at 48mm centres.
  • Two M8 hex bolts for battery cable fixing.
  • Dust shields fitted.


  • 25mm diameter shaft clearance or panel hole.
  • Total height including button: 148mm.

Body Beneath Panel Hole Dimensions

  • Width: 61mm.
  • Depth: 44mm.
  • Depth including cable bolts approximately: 62mm.

About The Albright SD150 Emergency Stop Switch

 Typically used on 12 Volts and 24-volt dc systems as an emergency stop or kill switch.

 The SD150 has been designed to provide a rapid means of disconnecting batteries or other power supplies in the event of serious electrical faults.

 The operation of the switch is such that with the operating knob depressed i.e. in the “off” position, no electrical functions can take place. However, if the knob is in the “On” position, the option of energising the coil and thus closing the main contacts becomes available. The coil energisation can be carried out either through the vehicle keyswitch or as a result of a signal from the vehicle electronic controller. When used as an emergency battery disconnect switch, manually depressing the operating knob will override the energised coil such that the main contact and the auxiliary contact (where fitted) will open until such time as the knob is again moved to the “on” position.

 The SD150 combines the dual function of a manual disconnect and coil operated line contactor. The benefits of this design include compact size and reduced installation costs combined with an electrical capacity sufficient for small and medium-size electric vehicles.

 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.

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


Application Uninterrupted
Device Type SP On-Off with Manual Disconnect
Voltage 24V D.C.
Coil Type Continuous
Thermal Current Rating (Ith) 150 Amps
Coil Resistance (Ohms) 52
Pull-In Voltage (V) 16.0 Maximum
Drop Out Voltage (V) 6.0 Maximum
Coil Power Dissipation (W) 11.08
Intermittent Current Rating 30% Duty 275A
40% Duty 235A
50% Duty 210A
60% Duty 195A
70% Duty 180A
Typical Voltage Drop Per Pole
Across New Contacts At 100A
Operating Ambient Temperature -40 to +60℃
Weight 590g


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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