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PRC4427 - Voltage Sensitive Switch – 45A by Land RoverElectrical Part Land Rover Range Rover Defender, Discovery, Range Rover

PRC4427 - Voltage Sensitive Switch – 45A

Sold out
€170,00 - €170,00
€170,00
€170,00 - €170,00
€170,00
Genuine Part
Genuine: Original manufacturer part. This product is the original part designed and produced by the vehicle manufacturer.
Voltage Sensitive Switch - a 45-amp voltage-sensitive relay used in the vehicle's auxiliary charging and accessory circuits.

The switch monitors system voltage and closes its main contacts once the sensed voltage rises above its threshold, bringing a secondary circuit online only while the charging system is active. It is used to control the split-charge circuit, the heated rear window supply and the air-conditioning relay circuit, switching the high-current load on the strength of the monitored voltage rather than a manual feed.
Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994
Fitment Notes DEFENDER 1987-2006 — 45 AMP voltage sensitive switch; Heated Rear Window circuit and Split Charge circuit (VIN DA310169-MA962814)
DISCOVERY 1 1989-1998 — 45 AMP, switch volt sensitive
RANGE ROVER CLASSIC 1986-1991 — 45 AMP, voltage sensitive switch; Air Conditioning relay circuit
RANGE ROVER CLASSIC 1992-1994 — 45 AMP, voltage sensitive switch; LHD and RHD variants (VIN JA610294-JA624780)
Alternative Codes
PRC4427

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Frequently asked questions

What does the PRC4427 voltage sensitive switch do?
The PRC4427 is a 45-amp voltage-sensitive switch that closes a high-current circuit once system voltage rises above its threshold. It brings a secondary load online only while the charging system is active, switching on monitored voltage rather than a manual feed.
Which circuits does the 45A voltage sensitive switch control?
The 45A voltage sensitive switch controls the split-charge and heated rear window circuits on the Defender, and the air conditioning relay circuit on Range Rover Classic. It energises these high-current loads when the charging system raises system voltage.
Which Land Rover models does the PRC4427 fit?
The PRC4427 fits the Defender 1987-2006 (VIN DA310169 to MA962814), Discovery 1 1989-1998 and Range Rover Classic up to 1994. Check your VIN against the chassis ranges, as Range Rover Classic 1992-1994 covers VIN JA610294 to JA624780.
How many voltage sensitive switches are needed?
Typically one voltage sensitive switch is fitted per controlled circuit. A vehicle usually needs a single PRC4427 for its split-charge or heated rear window supply, though setups running several auxiliary circuits may use more than one.