How do I choose between a 4-pin and 5-pin automotive accessory power relay?

A 4-pin relay is designed for basic on/off switching of a single accessory like fog lights or a horn, while a 5-pin relay includes both normally open and normally closed terminals to alternate power between two different circuits. This iRhapsody relay is a 4-pin SPST model for simple on/off control.

Can this power relay be used to upgrade high-wattage horns or lighting on my car?

Yes, installing an accessory power relay like this 120A iRhapsody model directs battery current straight to the new high-draw horns or lamps while drawing minimal signal current through your steering wheel or dashboard switch, preventing switch burnout. Ensure your accessory does not exceed the 120A continuous rating.

What is the iRhapsody 120A relay's coil resistance and power rating?

The iRhapsody 120A relay features a coil resistance of 80 ohms and a coil power rating of 1.8W. This specification is designed for enhanced reliability and efficiency compared to relays with lower resistance and higher power consumption.

Is this 120A relay suitable for continuous duty in Indian vehicles?

Yes, this relay is specifically rated for continuous duty and can operate reliably in Indian vehicles. Its wide temperature range (-30°C to +80°C) and robust design make it suitable for demanding conditions, including split charging applications.

How do I ensure the longevity of this 120A continuous duty relay?

To ensure optimal longevity, it is recommended to stay 10-15% below the relay's maximum rated capacity. For this 120A relay, this means avoiding sustained loads that consistently exceed approximately 102A to 108A.

What is the difference between this relay and lower-resistance models?

This relay's 80-ohm resistance and 1.8W coil power are designed for greater reliability and efficiency under continuous duty compared to relays with lower resistance (e.g., 60 ohms) and higher power consumption (e.g., 2.4W or 4.8W), which can be more prone to overheating and failure.

How to buy an original iRhapsody 120A relay in India?

Purchase the iRhapsody 120A relay from authorized US retailers and authorized brand partners, imported exclusively for you. It arrives factory-sealed with all customs duties and GST included, shipped via ExpressBox tracked delivery.

iRhapsody 120A Continuous Duty SPST 4-Pin Relay

Name: iRhapsody 120A Continuous Duty SPST 4-Pin Relay 12V DC (4.699 cm x 8.103 cm x 4.699 cm)
Brand: iRhapsody
SKU: wft9230
Price: 2066.00 INR
Availability: InStock

About this item

The iRhapsody 120A Continuous Duty SPST 4-Pin Relay is engineered for robust performance in Indian automotive applications. With a 12V DC coil and a reliable 1.8W power rating (80 ohms resistance), it offers superior dependability compared to lower-resistance relays. This heavy-duty relay handles a maximum switching current of 120A at 14V DC, making it ideal for split charging systems or powering high-demand accessories in vehicles across India.

Designed for continuous duty, this relay operates reliably within a wide temperature range of -30 to +80 degrees Celsius. Its SPST (Single Pole Single Throw) configuration with normally open contacts and M6/6mm stud terminals ensures straightforward integration into existing automotive electrical systems. The robust construction and high current capacity make it a dependable choice for upgrading or replacing critical power switching components.

Imported for the Indian market, this relay provides a durable solution for auxiliary power needs. All customs duties and GST are included in the listed price, with delivery via ExpressBox tracked shipping. Enjoy peace of mind with our 14-Day Smile Guarantee for any wrong or damaged items.

Key Features

Coil power: 1.8w, and coil resistance is 80 ohms. It is more reliable than 2.4w((60 ohms) and 4.8w(30 ohms) relays on the market
Large capacity, high current carrying capacity, heavy-duty make/break relay
Ideal for split charging or any vehicle needing a high-power relay
Never go beyond its capabilities; try to stay 10 to 15% below what the rate is for
The size of the round stud terminals: M6/6mm

Why choose this product

Superior Coil Design for Longevity

This relay utilizes a 1.8W coil with 80 ohms resistance, a design choice that enhances its reliability and lifespan compared to common 2.4W (60 ohms) or 4.8W (30 ohms) relays. This means it's less prone to overheating and failure during continuous duty cycles, a critical factor for automotive applications in India's varied climate. The robust construction ensures it can handle the demands of split charging or powering high-draw accessories without compromising performance, offering a dependable electrical switching solution.

Ideal for High-Demand Indian Vehicles

This 120A relay is perfect for Indian vehicles needing to power auxiliary systems like high-output horns, powerful LED light bars, or dual-battery setups for camping. Its continuous duty rating and high current capacity ensure it can handle the sustained load required for these accessories. While it's a robust component, users with extremely high-wattage systems (beyond 120A) should consider staying 10-15% below its maximum rating for optimal longevity, as recommended.

How to use

Determine the total current draw (in amps) of the accessory or system you intend to control. Ensure this draw does not exceed the relay's maximum continuous rating of 120A. — Identify Circuit Requirements
Connect the 12V DC power source (e.g., battery positive terminal) to the appropriate terminal on the relay's coil (usually pin 85 or 86). Connect the other coil terminal (pin 85 or 86) to a suitable ground point. — Connect Power and Ground
Connect the accessory's positive power input to the normally open (NO) contact terminal (usually pin 30). Connect the other terminal of the accessory (ground) directly to the vehicle's chassis ground. — Wire the Load Circuit
Connect the control switch (e.g., dashboard switch for lights) to the remaining relay coil terminal (pin 85 or 86) and to the positive side of the 12V DC power source. When the switch is activated, it energizes the coil, closing the circuit and powering the accessory. — Integrate Control Signal

Example scenarios

Typical situations where iRhapsody 120A Continuous Duty SPST 4-Pin Relay 12V DC (4.699 cm x 8.103 cm x 4.699 cm) helps — illustrative scenarios, not customer reviews.

Scenario 1

Illustrative example

Where it helps

Installing auxiliary LED driving lights on a Mahindra Thar for off-road adventures.

How this product helps

This 120A relay handles the high current draw of powerful LED bars, ensuring consistent illumination without overloading the vehicle's original wiring or switches. It provides reliable power for extended off-road trips.

Scenario 2

Illustrative example

Where it helps

Setting up a dual-battery system for a camper van to power accessories like a fridge and lights.

How this product helps

The continuous duty rating ensures the relay can manage the constant power transfer between batteries for the fridge and lighting systems, preventing overheating and ensuring reliable operation during long trips.

Specifications

Composition

Contact Material	Copper
Contact Type	Normally Open (SPST)
Coil Power	1.8W
Coil Resistance	80 ohms
Coil Voltage	12V DC
Pickup Voltage	8V DC
Dropout Voltage	1.2V DC
Maximum Applied Voltage	14V DC
Max Switching Current	120A
Max Switching Voltage	14V DC
Temperature Range	-30°C to +80°C (-22°F to 176°F)

Usage

Terminal Stud Size	M6/6mm
Continuous Duty	Yes
Ideal For	Split charging, high-power accessories

How we compare

Feature	iRhapsody 120A Continuous	Others
Continuous Duty Rating	120A continuous duty with 1.8W coil (80 ohms resistance)	Varies by brand; many local options may be rated for intermittent duty or lower continuous loads, potentially with higher resistance.
Coil Reliability	1.8W coil power (80 ohms) offers superior reliability over 2.4W (60 ohms) or 4.8W (30 ohms) designs.	Local relays may use higher power coils (e.g., 2.4W or 4.8W) which can be less efficient or reliable for continuous use.
Temperature Range	-30°C to +80°C (-22°F to 176°F)	Local relays might have a narrower operating temperature range, potentially impacting performance in extreme Indian climates.
Contact Type & Capacity	SPST Normally Open, 120A switching current at 14V DC	Local options may offer different contact types (e.g., SPDT) or lower current ratings, requiring careful selection for high-power needs.
Cost per Unit

SKU	wft9230
Brand	iRhapsody
Part Number	AutoRelay-12V120A1P
Model Number	AutoRelay-12V120A1P
Item Type Keyword	automotive-accessory-power-relays
Mounting Type	Screw Mount
Connector Type	Quick Connect
Operation Mode	Off
Number of Items	1
Number of Packs	1
Item Package Quantity	1
Measurement System	Metric
Item Dimensions (L x W x H)	4.7 cm x 4.7 cm x 8.1 cm (1.77 in x 1.77 in x 2.95 in)
Item Package Weight	0.091 kg (0.2 lb)
Specification Met	VDE, UL, NEMA, cUL

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Spec
Price

iRhapsody 120A Continuous Duty SPST 4-Pin Relay 12V DC (4.699 cm x 8.103 cm x 4.699 cm)

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