--- product_id: 39000585 title: "True Mods 12V DC 120 Amp Split Charge Relay Switch - Continuous Duty SPST 4-Pin Terminal High Power Relay for Truck Boat Marine" brand: "online led store" price: "HK$170" currency: HKD in_stock: true reviews_count: 9 category: "Online Led Store" url: https://www.desertcart.hk/products/39000585-true-mods-12v-dc-120-amp-split-charge-relay-switch store_origin: HK region: Hong Kong --- # 120A high current capacity Continuous duty 12V DC (14V max) 4-pin SPST with 1/4" studs True Mods 12V DC 120 Amp Split Charge Relay Switch - Continuous Duty SPST 4-Pin Terminal High Power Relay for Truck Boat Marine **Brand:** online led store **Price:** HK$170 **Availability:** ✅ In Stock ## Summary > ⚡ Stay powered, stay ahead — the relay that never quits! ## Quick Answers - **What is this?** True Mods 12V DC 120 Amp Split Charge Relay Switch - Continuous Duty SPST 4-Pin Terminal High Power Relay for Truck Boat Marine by online led store - **How much does it cost?** HK$170 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/39000585-true-mods-12v-dc-120-amp-split-charge-relay-switch) ## Best For - online led store enthusiasts ## Why This Product - Trusted online led store brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Continuous duty rating ensures reliable performance without burnout. - • **Plug & Play Precision:** 4-pin SPST design with sturdy 1/4" studs for secure, easy installation. - • **Power Through Anything:** Handles a massive 120 amps for your toughest electrical demands. - • **Silver-Plated Contacts:** Enhanced conductivity and corrosion resistance for long-term durability. - • **Versatile Applications:** Perfect for split charging in trucks, boats, marine, and solar projects. ## Overview The True Mods 12V DC 120 Amp Split Charge Relay Switch is a heavy-duty, continuous duty rated 4-pin SPST relay designed for high current automotive and marine applications. With a robust 120A capacity, silver-plated copper contacts, and secure 1/4" stud terminals, it ensures reliable power management for split charging, solar setups, and more, making it an essential upgrade for professionals demanding durability and performance. ## Description Buy True Mods 12V DC 120 Amp Split Charge Relay Switch - Continuous Duty SPST 4-Pin Terminal High Power Relay for Truck Boat Marine: Accessory Power - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Well worth the price - Works great for wiring a sub panel to an ignition switch so you don't kill your battery Review: Nice, inexpensive heavy duty relay - I used it in a solar water heater project. I'm using PV panels to run power to a DC element in water heater tank. The red #8 wires coming in from the PV panels run thru the relay on to the element. I used a 12vDC transformer (wall wart) to run a small amount of power thru the thermostat on the water heater, then back up to the relay so the thermostat setting controls the relay, allowing power to flow from the roof panels to the DC element and heat water. Normal water heater thermostats are not rated for DC and will burn up the contacts in the thermostat fairly quickly. This relay is rated for 120amp (!) which is way overkill for the 20-30 amps or so my panels will send to the element, so this ought to last a long time. ## Features - Heavy Duty 12VDC (14V Max) Continuous Duty Rated 4-Pin SPST (Single Pole Single Throw) Relay. - 120A High Current Carrying Capacity. - Normally Open with 60 Ohms Coil Resistance. - 1/4" Studs for Power Input and Output. - Perfect for Split Charging or Various Automotive Applications. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01N1IEWCU | | Best Sellers Rank | #85,173 in Automotive ( See Top 100 in Automotive ) #120 in Automotive Replacement Accessory Power Relays | | Brand Name | ONLINE LED STORE | | Coil Resistance | 60 Ohms | | Coil Voltage | 12 Volts | | Connector Type | Screw | | Contact Current Rating | 120 Amps | | Contact Material | Silver Plated Copper | | Contact Type | Normally Open | | Current Rating | 120 Amps | | Customer Reviews | 4.7 4.7 out of 5 stars (505) | | Item Weight | 3.36 ounces | | Manufacturer | ONLINE LED STORE | | Model | PSZACCEPS140R | | Mounting Type | Pole | | Operation Mode | 12v | | Part Number | PSZACCEPS140R | | UPC | 816165023903 | | Wattage | 1440 watts | ## Product Details - **Connector Type:** Screw - **Contact Material:** Silver Plated Copper - **Contact Type:** Normally Open - **Current Rating:** 120 Amps - **Mounting Type:** Pole ## Images ![True Mods 12V DC 120 Amp Split Charge Relay Switch - Continuous Duty SPST 4-Pin Terminal High Power Relay for Truck Boat Marine - Image 1](https://m.media-amazon.com/images/I/61pQAv610NL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: What is the amp draw of the relay itself when powered on?** A: The long answer here with "tricks" on how to get around the relay pull and hold currents is nothing anyone should pay attention to, in my opinion. I'll start by telling you I'm a retired electrical engineer who abhors those with a little knowledge snowing those with even less under the guise of "helping." If the armature isn't moved in with sufficient inertia, there will be significantly more arcing which will eventually cause failure. So, no... you can't just pull the contactor in at the lowest voltage the will physically move it. It's quite possible that your charging condition is while driving (house and chassis batteries on an RV, for instance) and that claimed holding voltage of 3.5V is also ignoring that it is not sufficient to keep the contacts from "bouncing" while driving... which leads to more arcing and a slow death of the contactor. In both the pull-in and hold conditions, inertia is your enemy. At just 50% of the rated current, there's more than enough power to weld the contactors closed or cause high resistance leading to thermal destruction. Especially in these relays where I am doubtful of their rated capacity. Look at the internals of this "200A" relay in the video I uploaded. Those two braided conductors are supposed to carry 100A each? Copper is rated to carry 100A when it is 2AWG! This is why actually high-current control is accomplished with contactors, not relays. See in the video where a large metal conductor is pulled into place across two contact points simultaneously. THAT is how high current is conducted without leading to disasters in a plastic box. Also, take notice of the ring terminals they provide to connect to the 1/4" lugs on this relay. You really think you can pass anywhere near 200A through those? I wouldn't try 20A. But, I digress. The absurdity of charging a capacitor and then trickling 20mA into it makes no sense as the cap is in parallel with the contactor coil and will discharge much faster than that. How random is 2200uF? How is that a "good size capacitor"? When people speak in vague terms, your BS detector should go off. Why not 2000uf or 1800uF? If 2200uF is "good" is 2800uF better? So, please don't take advice from barracks lawyers or you'll end up in jail. :-) **Q: will this 200 amp relay work for powering a 1500 watt inverter with relay engaged contanstly? Thanks.** A: Yes, this is a continuous duty relay capable of handling up to 200A @ 12V DC. The 1500W inverter should only be drawing 125A @ 12V DC, which is within the relay's capacity. Hope this helps. **Q: How much voltage does it take to connect curcuit** A: The trigger takes 12 V, 14V max and utilizes about 150 milliamp. Hope this helps. **Q: Is there a version of this relay that has an 87a terminal?** A: Unfortunately, we do not carry these high amperage relays with a normally closed terminal. Below is one which is rated at 60A normally closed and 80A normally open. Hope this helps. https://www.amazon.com/dp/B01NCA6CAB ## Customer Reviews ### ⭐⭐⭐⭐⭐ Well worth the price *by D***C on November 17, 2025* Works great for wiring a sub panel to an ignition switch so you don't kill your battery ### ⭐⭐⭐⭐⭐ Nice, inexpensive heavy duty relay *by T***Y on August 1, 2021* I used it in a solar water heater project. I'm using PV panels to run power to a DC element in water heater tank. The red #8 wires coming in from the PV panels run thru the relay on to the element. I used a 12vDC transformer (wall wart) to run a small amount of power thru the thermostat on the water heater, then back up to the relay so the thermostat setting controls the relay, allowing power to flow from the roof panels to the DC element and heat water. Normal water heater thermostats are not rated for DC and will burn up the contacts in the thermostat fairly quickly. This relay is rated for 120amp (!) which is way overkill for the 20-30 amps or so my panels will send to the element, so this ought to last a long time. ### ⭐⭐⭐⭐⭐ bang for the buck!!! *by T***L on November 6, 2023* I am using this as a master "ON/OFF" for electronics on my boat, controlled with a rocker in the panel. Works excellent and don't seem to have any loss of voltage. ## Frequently Bought Together - True Mods 12V DC 120 Amp Split Charge Relay Switch - 4 Terminal Relays for Truck Boat Marine - in-LINE Mini ANL Fuse Holder 2/4GA-2/4GA with Fuse Distribution Block Stereo/Audio/CAR - SOYOND 12 Volt Fuse Block, Boat Marine Fuse Block Panel with LED Warning Indicator Damp-Proof Cover 6 Circuits Fuse Box with Negative Bus Fuse Panel for Car Boat RV Truck Dc 12-24v --- ## 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.hk/products/39000585-true-mods-12v-dc-120-amp-split-charge-relay-switch](https://www.desertcart.hk/products/39000585-true-mods-12v-dc-120-amp-split-charge-relay-switch) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-05-26*