Engineered for high breaking capacity, rapid earth-leakage tripping, and tropicalized insulation stability. Fully aligned with MS IEC 61009-1 standards.
Understanding the severe environmental and technical demands placed on low-voltage distribution systems in Southeast Asia's fastest-growing metropolitan hub.
Kuala Lumpur features a tropical rainforest climate characterized by year-round high temperatures (30°C to 35°C ambient) and relative humidity frequently exceeding 90%. High atmospheric moisture leads to internal panel condensation, micro-tracking across phenolic insulating barriers, and accelerated contact oxidation.
RCBOs manufactured for the Kuala Lumpur market by Wenzhou OFA Electrical Technology Co., Ltd. integrate tropicalized flame-retardant thermoplastics (UL94-V0 rated) and anti-corrosive silver-alloy arc contacts capable of enduring harsh thermal cycling without dielectric breakdown.
The Klang Valley is recognized as one of the most lightning-prone regions globally, recording over 200 thunderstorm days per year. Lightning-induced voltage spikes generate high-frequency residual currents ($i/t$ surges) that cause nuisance tripping in standard residual current devices.
Our specialized RCBO lineups engineered for KL incorporate surge-proof filter circuits and delayed surge-immunity response mechanisms ($3\text{kA}$ $8/20\mu\text{s}$ impulse withstand capacity), ensuring continuous operational uptime for mission-critical facilities like data centers and medical complexes.
In Malaysia, power distribution equipment must strictly comply with guidelines established by the Suruhanjaya Tenaga (Energy Commission of Malaysia) and SIRIM QAS certifications. Standard MS IEC 61009-1 dictates the design, thermal performance, and tripping characteristics for Residual Current Breakers with Overcurrent Protection.
OFA's RCBO series are engineered to meet and exceed these Malaysian standards, supporting electrical contractors, OEM switchboard builders, and EPC engineers across Kuala Lumpur, Shah Alam, Puchong, and Cyberjaya in achieving smooth grid interconnection and statutory inspection sign-offs.
Replacing legacy MCB + RCD modular pairings with unified 1P+N / 2P RCBO units delivers unmatched panel efficiency, enhanced electrical safety, and selective fault isolation.
Traditional distribution boards require a separate RCCB/RCD serving multiple downstream MCBs. This setup consumes extensive DIN rail space. OFA's 18mm compact single-module RCBO combines overcurrent, short-circuit, and residual leakage protection in a single slot width, saving over 50% cabinet space in luxury high-rise DBs in KLCC and Bangsar.
In legacy group-protected systems, a minor ground fault on one socket causes the main RCCB to trip, blacking out entire floors or multiple critical circuits. Utilizing individual RCBOs per sub-circuit guarantees that only the faulted branch is disconnected, preserving continuous power for lighting, HVAC, and server nodes.
Modern electrical loads in modern Malaysia—such as variable-frequency drives (VFDs), inverter air-conditioners, PV solar inverters, and EV chargers—produce pulsating DC ground fault currents. Standard Type AC breakers fail to trip under DC components. OFA manufactures Type A and Type B RCBOs that reliably detect smooth and pulsating DC residual leakage.
| Parameter | OFMIN Series | OFOM Series | OFR1 Series | OFC 32A Series |
|---|---|---|---|---|
| Standard Compliance | MS IEC 61009-1 / EN 61009-1 | IEC 61009-1 / CE | IEC 61009-1 / CCC | MS IEC 61009-1 / CE |
| Pole Configuration | 1P+N (1 Module), 2P | 1P+N, 2P, 4P | 1P+N compact | 1P+N, 2P |
| Rated Current ($I_n$) | 6A, 10A, 16A, 20A, 25A, 32A, 40A | 6A to 63A | 6A to 40A | 6A, 10A, 16A, 25A, 32A |
| Rated Residual Current ($I_{\Delta n}$) | 10mA, 30mA, 100mA, 300mA | 30mA, 100mA, 300mA | 10mA, 30mA | 30mA, 100mA |
| Short-Circuit Capacity ($I_{cn}$) | 6,000A / 10,000A | 6,000A | 6,000A / 10,000A | 6,000A |
| Residual Current Type | Type AC, Type A, Type F | Type AC, Type A | Type A | Type AC, Type A |
| Tripping Curve | B Curve, C Curve | B, C, D Curve | B, C Curve | C Curve |
| Tropical Thermal Derating | Calibrated for 40°C Ambient | Calibrated for 40°C Ambient | Calibrated for 40°C Ambient | Calibrated for 40°C Ambient |
From commercial skyscrapers in Tun Razak Exchange (TRX) to industrial parks in Shah Alam, discover how OFA RCBOs safeguard key growth sectors.
Projects such as luxury condominiums in Mont Kiara and office towers around KL Sentral demand compact DB layouts with maximum safety. OFA's 10mA high-sensitivity RCBOs are deployed in wet zones (kitchens, bathrooms, swimming pool pump rooms) to prevent electrocution, while 30mA units handle general lighting and power circuits with zero false trips.
With Malaysia expanding its public EV charging network across major expressways and urban malls (e.g., Suria KLCC, Mid Valley Megamall), DC residual current protection is paramount. OFA Type A and Type B RCBOs protect AC chargers against 6mA smooth DC leakage, guarding both the vehicle onboard charger and the public grid connection.
Malaysia is Southeast Asia's fastest-growing data center node. Data center power distribution units (PDUs) cannot tolerate unexpected downtime. OFA smart RCBOs incorporate stable magnetic-hydraulic mechanisms resistant to thermal drift, along with auxiliary contact feedback for remote SCADA network monitoring.
In manufacturing hubs like Shah Alam, Klang, and Batu Caves, heavy machinery generates harmonic distortion and severe inductive load switching. OFA high-breaking-capacity 10kA RCBOs and MCCBs ensure reliable isolation under heavy short-circuit fault conditions up to 10,000 Amperes.
Rooted in China's low-voltage electrical capital, Wenzhou OFA Electrical Technology Co., Ltd. delivers global-tier precision, massive capacity, and direct manufacturer cost savings.
Founded in 2013 in Yueqing, Wenzhou, OFA has accumulated over 13 years of continuous power distribution R&D. Our company has been rated as Tax Credit Grade A for seven consecutive years, proving sound governance and financial stability.
Every single RCBO unit passing through our assembly lines undergoes strict digital testing: thermal-magnetic tripping calibration, residual current threshold measurement, and high-voltage insulation withstand verification. Zero out-of-factory defect tolerance.
We provide full customization—ranging from custom current ratings, brand laser markings, and localized packaging to specialized trip curve tuning. Located near Ningbo and Shanghai ports, we guarantee swift sea freight delivery directly to Port Klang, Malaysia.
How OFA is driving the evolution from passive trip protection to active digital energy management for modern smart cities.
OFA's next-generation smart RCBO series integrate embedded RS485, Modbus-RTU, and wireless LoRa/WiFi microchips. Facility managers in Kuala Lumpur can monitor real-time load current, operational line voltage, internal temperature, and continuous milliampere earth leakage levels from a central dashboard or smartphone app.
Rather than waiting for a hard ground fault to interrupt power, smart algorithms track incremental leakage creep over time (e.g., detecting cable degradation in humid sub-distribution boards). Warning alerts are issued when insulation leakage exceeds pre-configured safe thresholds (e.g., 15mA on a 30mA breaker), allowing scheduled preventative maintenance.
Driving the continuous progress of power distribution and control technology!
Professional, Reliable, and Time-Tested!
Wenzhou OFA Electrical Technology Co., Ltd. is one of the professional suppliers of distribution switchgear and control equipment in China. Founded in 2013, the company is rooted in Yueqing, Wenzhou — the Capital of Electrical Appliances in China. It owns independent brands such as "OFA", and its products cover multiple industries and applications including power, energy, industrial automation, construction and equipment manufacturing.
We adhere to honest and law-abiding operations, have been rated as tax credit grade A for seven consecutive years, and have earned the long-term trust of numerous clients.
Makes, carries, and breaks currents under normal conditions, with reliable trip protection against severe short-circuits and heavy system overloads.
Space-saving guardian at the end of modern power distribution systems, delivering precision overcurrent defense for sub-circuits.
Intelligent, high-performance core protection device designed for high-ampere main incoming panels and complex industrial switchgear.
Specialized high-reliability earth-leakage solution providing graded shock protection for residential and commercial end-users.
Innovatively integrates overcurrent, short-circuit, and high-sensitivity residual ground protection into a compact single-din unit.
Integrates complete switching and safe isolation capability into standard modular footprints for reliable maintenance lockout.
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