Best Relay Switch for Refrigerator: Top 5 PTC Start Relays
Choosing a reliable relay switch for a refrigerator is essential to protect the compressor and ensure smooth startup. This guide highlights five compatible PTC start relays that fit common mini-fridges, coolers, and home refrigeration units. Each option is evaluated based on compatibility, durability, and ease of installation to help you make an informed decision.
| Product | Brand | Resistance | Pin Type | Notes |
|---|---|---|---|---|
| QP2-4R7 4.7 Ohm Starter Relay | CORINTH | 4.7 Ohm | 3-pin | Compatible with QP2-4R7 family |
| QP-02-4.7 Starter Relay Kit | TUAIC | 4.7 Ohm | 3-pin | Includes overload protector; 110V compressors |
| QP2-4.7 Starter Relay (1 Pin) | Gosknor | 4.7 Ohm | 1-pin | Single-ended relay with overload protector |
| Semetall 4.7 PTC Dual Kit | Semetall | 4.7 Ohm (PTC) | 2-pin | Includes overload protector, 1/5HP |
| BlueStars W10613606 Kit | BlueStars | Not specified in brief | Not specified | Compat. with Whirlpool/KitchenAid models |
Below are five carefully chosen options designed to cover common refrigerator setups, from mini-fridges to standard household units. Each product listing includes the model compatibility and core features to help you compare at a glance.
QP2-4R7 4.7 Ohm Starter Relay (Corinth)
The QP2-4R7 starter relay by CORINTH is a 3-pin PTC device intended for 4.7 ohm resistance. It is described as a compressor starter/overload protector for mini fridges, beverage coolers, and similar units. Product notes emphasize compatibility with QP2-4R7 three-terminal relays and multiple replacement part numbers, aiding users who are replacing worn-out relays in supported models.
1Pcs QP-02-4.7 3Pin Starter Kit
This kit provides a 4.7 ohm 3-pin starter relay plus an overload protector for 1/2 HP refrigerators. It is noted as compatible specifically with QP-02-4.7 relays and 110V compressors. The kit includes explicit cautions about current handling, indicating a maximum current rating around 12A to avoid overheating.
QP2-4.7 Starter Relay With Overload (Gosknor)
Gosknor’s QP2-4R7 relay is a 4.7 ohm 1-pin PTC starter relay paired with a refrigerator overload protector (model 6750C-0005P). It emphasizes suitability for mini-fridges and coolers using 1-pin QP2-4.7 configurations. The supplier notes compatibility with related part numbers and stresses durability of plastic construction for long-term use.
Semetall 4.7 PTC Starter Kit
Semetall offers a 4.7 ohm PTC starting relay paired with a 1/5 HP overload protector, featuring a 2-pin configuration. The kit is marketed as a universal starting relay suitable for many mini refrigerators and coolers. The product highlights durability and rust resistance, with a focus on protecting the compressor during startup and under load.
BlueStars W10613606 Relay and Capacitor Kit
BlueStars presents the W10613606 kit, a refrigerator start relay and capacitor combination compatible with Whirlpool, KitchenAid, and Kenmore refrigerators. The listing emphasizes model verification before ordering and offers lifetime protection against defects. This option is positioned for users upgrading multiple components to ensure reliable startup performance and compatibility with specific Whirlpool/Kenmore models.
Buying Guide
Key purchase considerations include compatibility, electrical ratings, and the presence of an overload protector. When selecting a relay kit, verify the following:
- Model compatibility: Confirm your refrigerator’s model and compressor type to match the relay’s pin configuration (1-pin, 3-pin) and resistance (often 4.7 ohms).
- Current handling: Ensure the relay’s current rating supports your compressor’s startup and running current; exceeding ratings risks overheating and failure.
- Overload protection: Kits with an overload protector add a layer of safeguard against motor burnout during startup.
- Installation ease: Look for clearly labeled components and included wiring guidance to simplify replacement, especially for non-professional installers.
- Durability: Plastic housings and rust-resistant components extend the life of the relay under typical kitchen conditions.
- Brand and warranty: Reputable brands with return or lifetime protection offer greater post-purchase assurance.
From a practical perspective, the 4.7 ohm, 3-pin relays are common for many compact and mid-sized refrigerators, while 1-pin variants target specific mini-fridge configurations. Kits that combine both a relay and overload protector provide a consolidated solution, potentially reducing installation time and ensuring simultaneous protection measures. When in doubt, consult your fridge’s model number and compare with the product’s compatibility notes to avoid mismatches. If you use a kit across several units, a multi-pack option may offer cost efficiency and consistency in performance.