--- product_id: 526235910 title: "Relay 120A, 12V Continuous Duty SPST 4-pin High Power Relay Set" brand: "irhapsody" price: "¥5595" currency: JPY in_stock: true reviews_count: 8 category: "I Rhapsody" url: https://www.desertcart.jp/products/526235910-relay-120a-12v-continuous-duty-spst-4-pin-high-power store_origin: JP region: Japan --- # 120A max current capacity 12V continuous duty coil voltage M6 stud terminals for secure connections Relay 120A, 12V Continuous Duty SPST 4-pin High Power Relay Set **Brand:** irhapsody **Price:** ¥5595 **Availability:** ✅ In Stock ## Summary > ⚡ Elevate your ride’s power game with iRhapsody’s 120A heavy-duty relay! ## Quick Answers - **What is this?** Relay 120A, 12V Continuous Duty SPST 4-pin High Power Relay Set by irhapsody - **How much does it cost?** ¥5595 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/526235910-relay-120a-12v-continuous-duty-spst-4-pin-high-power) ## Best For - irhapsody enthusiasts ## Why This Product - Trusted irhapsody brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Operates flawlessly from -30°C to +80°C, ready for any environment - • **Perfect for Pros:** Ideal for split charging setups and high-power automotive applications - • **Efficient & Reliable:** Low 1.8W coil power with 80Ω resistance ensures long-lasting operation - • **Precision Engineering:** M6/6mm round stud terminals provide rock-solid, vibration-resistant connections - • **Powerhouse Performance:** Handles a robust 120 amps for heavy-duty vehicle demands ## Overview The iRhapsody Relay 120A is a high-performance 12V continuous duty SPST relay designed for demanding automotive applications. Featuring a low-power 1.8W coil with 80 ohms resistance, it delivers reliable switching at up to 120 amps. Its rugged M6 stud terminals and wide operating temperature range (-30°C to +80°C) ensure durability and secure connections, making it the go-to choice for split charging and heavy current vehicle systems. ## Description 12V DC 120Amp Split Charge Relay Heavy Duty 4 Pin SPST (Single Pole Single Throw) relay Nominal coil voltage: 12 V DC Pickup voltage: 8 V DC Dropout voltage: 1.2 V DC Maximum applied voltage: 14 V DC Max Switching Current: 120A Max Switching Voltage: 14 V DC Temperature Range: -30 ~ +80 degrees Celsius Feature 1), Advantage - coil power: 1.8W; coil resistance: 80 ohms. It is more reliable than 2.4W (60 ohms) and 4.8W (30 ohms) relays on the market. 2), Large capacity: 120 amp high current carrying capacity, heavy-duty make/break relay. 3), Ideal for split charging or any vehicle needing a high-power relay. Review: Good quality and included connections - I got them today. They look good and the internal wiring is good quality. I have to 525 Walbro Hellcat pumps that pull 15-25amps I've burned up a few relays because of the amperage. So hopefully these will be strong enough. Gonna up grade my wiring with the included copper eyelets and see how they hold up Review: I rhapsody relay, 4pin 120amp - I like the fact this high current relay has load terminal lugs and nuts. A more reliable high current connection. I used this relay along with an 80 amp circuit breaker to isolate battery power to a 1000 watt inverter in the event the inverter’s power switch were left on. This arrangement works well. ## 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BJ9RQFWX | | Best Sellers Rank | #4,704 in Automotive ( See Top 100 in Automotive ) #2 in Automotive Replacement Accessory Power Relays | | Brand Name | iRhapsody | | Coil Resistance | 80 Ohms | | Coil Voltage | 12 Volts (DC) | | Connector Type | Screw | | Contact Current Rating | 120 Amps | | Contact Type | Normally Open | | Current Rating | 120 Amps | | Customer Reviews | 4.6 4.6 out of 5 stars (91) | | Manufacturer | IRHAPSODY | | Minimum Switching Voltage | 8 Volts (DC) | | Model | AutoRelaySet-12V120A | | Mounting Type | Screw Mount | | Operation Mode | Automatic | | Part Number | AutoRelaySet-12V120A | | Specification Met | [Possibly] | | Warranty Description | one-year warranty | | Wattage | 1.8 watts | ## Product Details - **Brand:** iRhapsody - **Connector Type:** Screw - **Contact Type:** Normally Open - **Current Rating:** 120 Amps - **Mounting Type:** Screw Mount ## Images ![Relay 120A, 12V Continuous Duty SPST 4-pin High Power Relay Set - Image 1](https://m.media-amazon.com/images/I/61x-eGR8OLL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good quality and included connections *by M***H on December 31, 2025* I got them today. They look good and the internal wiring is good quality. I have to 525 Walbro Hellcat pumps that pull 15-25amps I've burned up a few relays because of the amperage. So hopefully these will be strong enough. Gonna up grade my wiring with the included copper eyelets and see how they hold up ### ⭐⭐⭐⭐⭐ I rhapsody relay, 4pin 120amp *by R***Y on October 4, 2025* I like the fact this high current relay has load terminal lugs and nuts. A more reliable high current connection. I used this relay along with an 80 amp circuit breaker to isolate battery power to a 1000 watt inverter in the event the inverter’s power switch were left on. This arrangement works well. ### ⭐⭐⭐⭐⭐ Great upgrade from car electric fans controls. *by K***E on September 23, 2025* I have dual electric fans on my SBC and constantly having relay failures. These are perfect for high draw electric fans on your vehicle. Most kits come with cheap small relays that never last. This has been a fantastic purchase and will easily handle fans . Local auto parts wanted $20 for a cheap relay and came with no connectors. These have great connectors and no my fans are pulling more air since the orginals were restricting electric load to the fans. Upgrade your fans with a strong better made relay like this! ## Frequently Bought Together - irhapsody 120amp 12v Continuous Duty Relay, 4-pin Spst High-Current Starter Relay - TKDMR 160Pcs Copper Wire Lugs AWG2 4 6 8 10 12 with Heat Shrink Set, 80Pcs Battery Cable Ends Ring Terminals Connectors Tubing Assortment Kit - TKDMR 10pcs 1/0 AWG-3/8 Battery Lugs,Heavy Duty Wire Lugs,Ring Terminals,Battery Cable Ends,0 Guage terminals,Battery Terminal Connectors with 10pcs 3:1 Heat Shrink Tubing --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/526235910-relay-120a-12v-continuous-duty-spst-4-pin-high-power](https://www.desertcart.jp/products/526235910-relay-120a-12v-continuous-duty-spst-4-pin-high-power) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-05-20*