--- product_id: 539503775 title: "SJ2 Single Phase Preventer | 5–12.5 HP | 280–415V AC | Phase Failure Protection for Pumps | SJ" brand: "sj" price: "R721" currency: ZAR in_stock: true category: "Sj" url: https://www.desertcart.co.za/products/539503775-sj2-single-phase-preventer-5-12-5-hp-280-415v store_origin: ZA region: South Africa --- # 5–12.5 HP motor range 280–415V AC wide voltage compatibility Instant phase failure & imbalance protection SJ2 Single Phase Preventer | 5–12.5 HP | 280–415V AC | Phase Failure Protection for Pumps | SJ **Brand:** sj **Price:** R721 **Availability:** ✅ In Stock ## Summary > 🛡️ Don’t let phase failure burn your motor—protect smart, run smooth! ## Quick Answers - **What is this?** SJ2 Single Phase Preventer | 5–12.5 HP | 280–415V AC | Phase Failure Protection for Pumps | SJ by sj - **How much does it cost?** R721 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/539503775-sj2-single-phase-preventer-5-12-5-hp-280-415v) ## Best For - sj enthusiasts ## Why This Product - Trusted sj brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Voltage Versatility:** Operates seamlessly across 280–415V AC, ensuring reliable performance in diverse electrical environments. - • **Universal Motor Guardian:** Protects 3-phase motors from 5 to 12.5 HP, covering your essential pump and machinery needs. - • **Compact Panel-Mount Design:** Sleek and easy to install in any control cabinet, saving space without compromising protection. - • **Smart Phase Failure Defense:** Automatically cuts power at the first sign of single phasing to prevent costly motor burnout. - • **Rugged Industrial-Grade Build:** Engineered for harsh conditions, guaranteeing long-lasting durability and peace of mind. ## Overview The SJ2 Single Phase Preventer is a robust, Indian-made device designed to safeguard 3-phase motors from 5 to 12.5 HP against phase failure and voltage imbalance. Compatible with 280–415V AC supplies, it features automatic disconnection on fault detection, a compact panel-mount design, and rugged construction for industrial reliability. Trusted by lakhs nationwide, it’s the essential protector for pumps and machinery, minimizing downtime and costly repairs. ## Description Product Description Protects Your 5 to 12.5 HP Motor from Phase Failures | Trusted by Lakhs of Users | Made in India by S.J. Switchgears 100% Phase Failure Protection Preventor instantly cuts off motor supply when it detects missing phase helping prevent motor coil damage and costly downtime. One Device for All Motors: 5 to 12.5 HP Supports a wide HP Range from 5 to 12.5 works with most 3-phase motors — whether it’s for pumps, panels, or machinery. Ideal for residential, agricultural, and commercial use. Made in India. Trusted by Lakhs. Proudly manufactured by S.J. Switchgears Pvt. Ltd. in Bangalore. Trusted by Lakhs of customers nationwide for rugged, reliable motor protection solutions. ## Features - Motor Protection: Protects 3-Phase Motors (5–12.5 HP) from phase failure and imbalance to prevent costly damage - Wide Voltage Compatibility: Works on 280–415 V AC, 50 Hz 3-phase supply for reliable operation across different voltage conditions - Easy Installation: Compact, Panel-Mount Design for easy installation in pump panels and control cabinets - Rugged Build Quality: Durable Construction built for rugged industrial conditions and long-lasting performance - Single Phasing Prevention: Automatically disconnects motor supply when single phasing is detected to avoid motor burnout - Voltage Imbalance Detection: Monitors and protects against severe voltage imbalance conditions that can damage motor windings ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B078XBX4HC | | Are batteries included? | No | | Best Sellers Rank | #46,942 in Garden & Outdoors ( See Top 100 in Garden & Outdoors ) #246 in Pumps | | Brand | SJ | | Colour | White | | Country of Origin | India | | Customer Reviews | 3.7 3.7 out of 5 stars (3) | | Date First Available | 9 January 2018 | | Item Dimensions LxWxH | 17.5 x 10.5 x 4.5 Centimeters | | Item Height | 4.5 Centimeters | | Item Weight | 500 g | | Item Width | 10.5 Centimeters | | Item model number | PR-04 | | Manufacturer | SJ | | Model number | PR-04 | | Number of Memory Sticks | 1 | | Product Dimensions | 17.5 x 10.5 x 4.5 cm; 500 g | ## Images ![SJ2 Single Phase Preventer | 5–12.5 HP | 280–415V AC | Phase Failure Protection for Pumps | SJ - Image 1](https://m.media-amazon.com/images/I/61eNulsjSML.jpg) ![SJ2 Single Phase Preventer | 5–12.5 HP | 280–415V AC | Phase Failure Protection for Pumps | SJ - Image 2](https://m.media-amazon.com/images/I/819CLFKhVUL.jpg) ![SJ2 Single Phase Preventer | 5–12.5 HP | 280–415V AC | Phase Failure Protection for Pumps | SJ - Image 3](https://m.media-amazon.com/images/I/A1PhW1kSo3L.jpg) ![SJ2 Single Phase Preventer | 5–12.5 HP | 280–415V AC | Phase Failure Protection for Pumps | SJ - Image 4](https://m.media-amazon.com/images/I/61vFAZrKFPL.jpg) ![SJ2 Single Phase Preventer | 5–12.5 HP | 280–415V AC | Phase Failure Protection for Pumps | SJ - Image 5](https://m.media-amazon.com/images/I/61gCysljViL.jpg) --- ## 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.co.za/products/539503775-sj2-single-phase-preventer-5-12-5-hp-280-415v](https://www.desertcart.co.za/products/539503775-sj2-single-phase-preventer-5-12-5-hp-280-415v) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-06-19*