iRhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay Kit Instruction Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of your iRhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay Kit. Please read this manual thoroughly before use to ensure proper function and safety. This kit is designed for various automotive electrical applications, providing reliable switching capabilities.

2. Product Overview

2.1 Features

12-volt 5-prong SPDT (Single Pole Double Throw) relay.
Water-repellent and dustproof design for enhanced durability.
Heavy-duty pigtail with 12 AWG tinned copper wire for primary leads and 16 AWG for coil leads.
Nominal Coil Voltage: 12 V DC.
Contact Ratings: Normally Open (NO) 40A 14V DC.
Maximum Switching Current: 40A.

2.2 Package Contents

The iRhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay Kit includes:

5 x 12V DC Waterproof Relays with Heavy-Duty Pigtails

3. Specifications

Parameter	Value
Nominal Coil Voltage	12 V DC
Coil Power	1.8 W
Coil Resistance	80 Ω
Must Operate Voltage	6~8 V DC
Must Release Voltage	0.6~3.6 V DC
Maximum Applied Voltage	15.6 V DC
Contact Ratings	NO 40A 14V DC
Contact Resistance	100mΩ MAX (at 6VDC 1A)
Max Switching Current	40A
Max Switching Power	560 W
Life Expectancy Electrical	100,000 Operations (at 30 Operations/minute)
Life Expectancy Mechanical	10,000,000 Operations
Temperature Range	-30 ~ +80 degrees Celsius
Vibration Resistance	10~55Hz, 1.5mm
Shock Resistance	Operations Extremes: 10g. Damage Limits: 100g
Humidity	40% ~ 85%
Insulation Resistance	100mΩ Min at 500VDC
Dielectric Strength Between Open Contacts	500VAC (for one minute/sec)
Dielectric Strength Between Contact and Coil	750AC (for one minute/sec)
Operate Time	7ms
Release Time	5ms
Product Dimensions	7.85 x 1.6 x 1.7 inches; 1.1 Pounds
Connector Type	Plug-In
Contact Material	Copper
Mounting Type	Socket Mount

Relay dimensions and pin configuration — Image 2: Detailed view of the relay showing dimensions (1.8" height, 1.4" width, 0.8" bracket height) and pin numbers (87, 87a, 86, 85, 30).

4. Safety Information

WARNING: Electrical work can be dangerous. If you are not confident in your ability to safely install this product, seek assistance from a qualified professional.

Always disconnect the vehicle's battery before performing any electrical work.
Ensure all connections are secure and properly insulated to prevent short circuits.
Do not exceed the rated current (40A) or voltage (12V DC) of the relay. It is recommended to operate at 10-15% below the maximum rating for optimal performance and longevity.
While the relay is water-repellent and dustproof, it is not designed for submersion in water. Avoid direct exposure to heavy water streams or prolonged wet conditions.
Use appropriate fuses in your circuit to protect against overcurrent.
Verify correct wiring before applying power to prevent damage to the relay or connected components.

5. Installation

5.1 Understanding the 5-Pin SPDT Relay

This relay is a Single Pole Double Throw (SPDT) type, meaning it has one common input (pin 30) and two outputs: one normally open (NO, pin 87) and one normally closed (NC, pin 87a). When the coil (pins 85 and 86) is energized, the common input switches from the normally closed contact to the normally open contact.

Relay wire map and socket view — Image 3: Wire map diagram showing the internal connections of the 5-pin relay (86, 87a, 85, 30, 87) and a view of the relay socket with corresponding pin locations.

5.2 Wiring Connections

The pigtail wires are color-coded for easier identification, though specific color assignments can vary. Always refer to the pin numbers on the relay and the wiring diagrams below for accurate connections.

Pin 30: Common input from the power source (e.g., battery positive, fused).
Pin 87: Normally Open (NO) output. This pin connects to pin 30 when the relay coil is energized. Connect to the positive terminal of the device you want to power.
Pin 87a: Normally Closed (NC) output. This pin is connected to pin 30 when the relay coil is de-energized.
Pin 85: One side of the relay coil. Typically connected to ground or a trigger signal.
Pin 86: The other side of the relay coil. Typically connected to a positive trigger signal or power.

Important:

The primary leads use 12 AWG tinned copper wire, suitable for high current applications.
The coil leads use 16 AWG wire.
When inserting the relay into its socket, ensure proper alignment. Forcing it can bend the female connectors, leading to poor contact or damage.

5.3 Typical Wiring Diagrams

5.3.1 Normally OFF Relay with a Ground Trigger

Wiring diagram for ground trigger relay — Image 4: Wiring diagram for a normally OFF relay activated by a ground trigger. Pin 30 connects to battery positive via a fuse, Pin 87 connects to the device, Pin 85 connects to battery positive, Pin 86 connects to the ground trigger source, and the device connects to ground.

In this configuration, the relay activates when pin 86 receives a ground signal.

Connect Pin 30 to the positive (+) terminal of the battery via an appropriate fuse.
Connect Pin 87 to the positive (+) input of the device you wish to power.
Connect Pin 85 to the positive (+) terminal of the battery.
Connect Pin 86 to your ground trigger source (e.g., a switch that provides ground when activated).
Connect the negative (-) input of your device to a chassis ground.
Pin 87a is left disconnected if not used.

5.3.2 Normally OFF Relay with a Positive Trigger

Wiring diagram for positive trigger relay — Image 5: Wiring diagram for a normally OFF relay activated by a positive trigger. Pin 30 connects to battery positive via a fuse, Pin 87 connects to the device, Pin 85 connects to ground, Pin 86 connects to the positive trigger source, and the device connects to ground.

In this configuration, the relay activates when pin 86 receives a positive signal.

Connect Pin 30 to the positive (+) terminal of the battery via an appropriate fuse.
Connect Pin 87 to the positive (+) input of the device you wish to power.
Connect Pin 85 to a chassis ground.
Connect Pin 86 to your positive trigger source (e.g., a switch that provides 12V when activated).
Connect the negative (-) input of your device to a chassis ground.
Pin 87a is left disconnected if not used.

6. Operation

Once properly installed and wired, the relay operates by switching the high-current circuit (pins 30, 87, 87a) based on a low-current control signal applied to the coil (pins 85, 86).

When the control signal energizes the coil, the internal switch moves, connecting pin 30 to pin 87 (Normally Open). This allows power to flow to the connected device.
When the control signal is removed, the coil de-energizes, and the internal switch returns to its default position, connecting pin 30 to pin 87a (Normally Closed) and disconnecting pin 30 from pin 87.

Ensure that the control signal voltage matches the relay's nominal coil voltage (12V DC) for reliable operation.

7. Maintenance

The iRhapsody waterproof relay kit is designed for durability and requires minimal maintenance. However, periodic checks can help ensure long-term reliability:

Inspect Connections: Periodically check all wiring connections for tightness and corrosion. Loose connections can lead to resistance, heat buildup, and potential failure.
Check for Damage: Visually inspect the relay and pigtail wires for any signs of physical damage, fraying, or melting. Replace any damaged components immediately.
Environmental Exposure: While water-repellent, avoid exposing the relay to harsh chemicals, extreme temperatures outside its operating range, or prolonged submersion.
Cleanliness: Keep the relay and its connections free from dirt, dust, and moisture.

8. Troubleshooting

If the relay or connected device is not functioning as expected, consider the following troubleshooting steps:

Problem	Possible Cause	Solution
Relay does not click or activate	No power to coil (pins 85 & 86) Incorrect wiring of coil Faulty relay coil	Check voltage at pins 85 and 86 when trigger is active. Verify coil wiring against diagram. Test relay with a known good 12V source; replace if faulty.
Device does not receive power when relay activates	No power to pin 30 Blown fuse Incorrect wiring of load circuit Faulty relay contacts	Check voltage at pin 30. Inspect and replace fuse if blown. Verify load circuit wiring (pins 30, 87) against diagram. Test continuity across pins 30 and 87 when activated; replace if faulty.
Relay remains activated or stuck	Coil continuously energized Stuck contacts	Check trigger source for continuous signal. Replace relay if contacts are physically stuck.
Overheating of relay or wires	Overcurrent Loose connections Undersized wiring	Ensure load current is within 40A rating (ideally 10-15% below). Tighten all connections. Verify wire gauge is appropriate for the current draw.

If issues persist after troubleshooting, contact iRhapsody customer support for further assistance.

9. Warranty and Support

iRhapsody products are manufactured to high-quality standards. For specific warranty information or technical support, please refer to the product packaging or contact iRhapsody customer service directly. Keep your purchase receipt for warranty claims.

For further assistance, please visit the iRhapsody Store on Amazon.

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