UMS 9120N 20A 1 Gang 1 Way DP Switch
The UMS 9120N 20A 1 Gang 1 Way DP Switch is a heavy-duty electrical switch manufactured in Malaysia, designed to control high-wattage home appliances like storage water heaters and air conditioners. Rated at 20 Amperes (250V AC), this double-pole wall switch disconnects both Live and Neutral lines simultaneously, ensuring total electrical isolation and preventing accidental shocks or short circuits. Certified by SIRIM, Suruhanjaya Tenaga (ST), and JKR standards, it features high-grade flame-retardant polycarbonate housing, durable copper contact terminals, and a clear red neon indicator.
Full Description:
Upgrade your household electrical infrastructure with the authentic UMS 9 Series 20A Double Pole Switch (Model 9120). Standard 10A light switches cannot handle heavy electrical loads without overheating, melting, or creating fire hazards. The UMS 9120 is built for heavy-duty power demands, making it essential for home water heating systems, split-unit air conditioners, induction cooktops, and commercial equipment.
Key Features & Technical Advantage
- High-Current 20A Power Capacity: Rated for 20 Amperes at 250V AC, handling high starting currents without trips or contact arc wear.
- True Double-Pole (DP) Circuit Isolation: Breaks both the live circuit and neutral current simultaneously. This prevents stray currents from reaching the appliance during off status or maintenance.
- Bright Neon Power Indicator: Features an integrated red neon lamp that signals active power delivery, helping save energy by avoiding forgotten running appliances.
- Flame-Retardant Polycarbonate Body: Impact-resistant, high-temperature casing designed to resist yellowing, cracking, and electrical tracking over years of continuous use.
- Phosphor Bronze Metal Terminals: High-tension internal contacts provide low resistance, minimizing heat generation and maintaining secure clamping pressure on thick copper wires.
- Ergonomic Rocker Plate: Styled with a smooth wide-rocker mechanism for quick tactile feedback and comfortable daily operation.
Safety Compliance & Standards
Safety is vital for high-power appliances. The UMS 9120 20Amp DP Switch undergoes testing to meet strict local and international regulatory standards:
- SIRIM QAS Certified: Meets Malaysian standards MS IEC 60669-1 for household switch performance.
- Suruhanjaya Tenaga Approved: Authorized for residential and commercial building grid installation across Malaysia.
- JKR Approved Specification: Suitable for Malaysian public works department contracts and commercial property construction.
- International Standard Compliant: Conforms to BS EN 60669-1, SS 227-1, and IEC 60669-1 electrical safety codes .
Ideal Applications
- Storage & Instant Water Heaters: Provides isolated power cut-off for instant shower heaters and central storage water tanks.
- Residential Air Conditioners: Handles continuous startup currents for 1.0 HP to 2.5 HP wall-mounted split aircon units.
- Heavy Household Appliances: Suitable for high-draw induction cookers, built-in electric ovens, and heavy clothes dryers.
- Commercial & Office Fit-Outs: Fits standard BS concealed wall backboxes or surface-mounted PVC enclosure boxes.
Installation & Maintenance Advice
For installation, ensure mains power is cut off at your main distribution board (DB box) RCCB before replacing existing switches. Strip wire ends cleanly and tighten terminal screws securely to ensure stable contact and prevent arcing. Installation by a registered wireman or certified electrician is strongly recommended.
Q1: Can I use the UMS 9120 switch for my home water heater in Malaysia?
A: Yes, the UMS 9120 20A DP switch is specifically engineered and SIRIM-certified for high-wattage appliances like instant and storage water heaters.
Q2: What air conditioner horsepower can a 20A UMS DP switch support?
A: A 20A DP switch safely supports single-phase residential split-unit air conditioners rated up to 2.5 HP under standard 240V Malaysian power supplies.
Q3: Why is a Double Pole (DP) switch required for aircon and water heater units?
A: DP switches disconnect both active power lines (Live & Neutral), protecting against ground faults, power surges, and electrical leakage during servicing.
Q4: Will the UMS 9120 fit inside standard Malaysian switch backboxes?
A: Yes, it uses standard 86mm x 86mm mounting dimensions, fitting standard concealed or surface-mounted PVC switch boxes in Malaysian homes.
Q5: Where is the UMS 9 Series 9120 DP switch manufactured?
A: Where is the UMS 9 Series 9120 DP switch manufactured?
Q6: Can I replace a broken 20A switch with a UMS 9120 by myself?
A: DIY replacement is possible if power is cut off at the main DB box, but hiring a certified Wireman/Electrician ensures safety and SIRIM code compliance.
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