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40A 12v Relay with LED

Product Code: PR40

$USD 34.79

Introducing the PR40 Power Relay: The Ultimate Solution for High-Current Fuel Pumps, fans and water pumps
Developed in collaboration with the world's leading OEM relay manufacturer, the Aftermarket Industries PR40 is the only 12V 40A relay on the market that boasts:
  • 2-Way Fault Detection LED
    • Instantly pinpoint relay issues for quick and easy troubleshooting
  • Integrated Circuit Board (PCB) & Surge Protection Diode
    • Ensures reliable performance and protects your fuel pump from damaging voltage spikes.
  • Vibration & Shock Resistant to 10G (IEC 60255-21-1/2)
  • OEM Manufacturing for High Current Demands
    • Manufactured to exacting original equipment standards under the control of ISO9001 and IEC.
    • The PR40 relay contact material is manufactured from industrial-grade copper Silver Tin Oxide plated (AgSnO2): AgSn02 minimizes voltage drops and prevents contact failure due to contact welding, especially under high inrush currents like those from fuel pumps. This ensures optimal performance and reliability of critical components. Standard relays often use lower-grade materials that are more susceptible to welding, corrosion, and failure.
      • Specifically designed to handle the demanding power requirements of high-performance fuel pumps like the Walbro 460, 520, 525, and 535.
  • Robust IP50 construction for demanding motorsport applications
    • Protection against dust and solid objects.
  • High Temperature Performance
    • Operates reliably in ambient temperatures from -40°C to +85°C.
Experience Unmatched Reliability and Peace of Mind

*Includes Mounting Block & 46A (Amp) Pin/Connector Kit - Mounting Blocks allow multiple relays to be interlocked/staked together

The Aftermarket Industries 12v PR40 relays are manufactured to exacting original equipment standards under the control of ISO9001 and IEC 

PR40 Relay Operation Guide Table (12V Only):

Feature/Condition

Specification/Value

Description/Explanation

Voltage

12V DC

The relay is designed for 12V automotive electrical systems.

Pick-up Voltage

≤ 8.4V

The maximum voltage at which the 12V relay will reliably activate.

Drop-out Voltage

≥ 1.2V

The minimum voltage at which the 12V relay will reliably deactivate.

Coil Resistance

80Ω ± 10%

The electrical resistance of the 12V relay's coil.

Power Consumption

1.8 (likely Watts)

The power consumed by the relay's coil during operation.

Max. Allowable Overdrive Voltage (20°C)

20.2V

The maximum voltage that can be applied to the 12V relay coil at 20°C without causing damage.

Max. Allowable Overdrive Voltage (85°C)

15.7V

The maximum voltage that can be applied to the 12V relay coil at 85°C without causing damage.

LED Indicator (Blue)

Operation OK

Indicates that the relay is operating normally.

LED Indicator (Red - Ignition Off)

Normal Condition (No Current Draw)

Indicates that the relay is in its resting state when the ignition is off.

LED Indicator (Red - Ignition On)

Pump Staged or Pump Fault (No Current Draw)

Indicates a potential issue when the ignition is on, such as a staged fuel pump or a pump fault.

Contact Material

Copper with AgSnO2 (Silver Tin Oxide)

Provides excellent conductivity, corrosion resistance and resistance to contact welding.

Surge Absorbing Diode

Integrated

Protects sensitive components from voltage spikes.

Current Rating

40A

Maximum current the relay can handle.

IP Rating

IP50

Protection against dust and solid objects.

Lifespan

50,000 Cycles

Tested lifespan, indicating durability.

Relay Connections

Pin 30 (Power In), Pin 85 (Earth), Pin 86 (Switch), Pin 87 (Power Out)

Standard relay pin configuration.

Integrated Circuit Board (PCB)

Integrated

Improves reliability, especially in high-vibration environments.

Mounting

Includes Mounting Block & 46A Pin/Connector Kit

Allows for easy installation and secure connections.

Contact Form

1 Form A (SPST-NO)

Single Pole Single Throw - Normally Open.

Product Specifications

Weight .02 kg
Dimensions 8 × 5 × 5 cm
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