IP65 PV Box
TOMZN IP65 Solar Photovoltaic Combiner Box 1-In 1-Out DC Distribution Enclosure
Pre-Wired DC MCB
IP65 Waterproof
UV-Resistant ABS
Export-Grade Inventory
High-Performance Enclosures & Integrated Control Modules
Engineered to resist coastal monsoon rains, high ambient thermal cycles, and severe grid fluctuations common to Southeast Asian infrastructure.
Multi-Way Outdoor
HT Outdoor Waterproof Electrical Distribution Box (5, 8, 12, 15, 18 Ways)
IP65 Rated
DIN Rail Mount
PC/ABS Housing
ATS Integration
HT-9WAY Waterproof Dual Power ATS Box Pre-Wired with 7-Day Digital Timer
2P 63A ATS
220V Switching
Generator Control
Smart Timing
TOMZN TOS7-B Bluetooth Smart Timer Switch 40A 63A 85-265V EasyCon App Remote
DIN Rail Mount
28 Timing Groups
Countdown Mode
Weekly Digital
TOMZN 1NO 1NC DIN Rail Weekly 7 Days Programmable Digital Timer Switch Relay 16A
220V/12V/24V/48V
Microcontroller LCD
Power Reserve
Industrial Relay
TORT7 Series 10-in-1 Asymmetric Cycler Multi-Function Time Relay Switch 0.1S-10D
Delay ON/OFF
Pulse Generator
Wide Voltage Range
Heavy-Duty Control
TOS6-40 Bluetooth Time Control Switch 35mm DIN Rail / Wall-Mounted AC85-265V 40A
High-Amp Switching
Dual Mounting
Loop Program
Smart Terminal
TOMZN Bluetooth Smart Countdown Timer Switch 10A 30A EasyCon Wall-Mounted
EasyCon Mobile App
Wall-Mount Shell
Irrigation / HVAC
Direct Manufacturing Authority
Precision Electrical Manufacturing from Liushi Town, China
Operating from Huabei Village in Liushi Town, Wenzhou—China’s global epicenter for low-voltage electrical technology—Zhejiang TMB Electric Co., Ltd. delivers direct factory engineering, strict component traceability, and verifiable international compliance.
TÜV Rheinland Verified Production
Our 5,700 m² modern manufacturing plant is fully inspected and assessed on-site by TÜV Rheinland. We maintain ISO9001 certified quality management protocols across our entire assembly line, ensuring every distribution board and circuit breaker strictly meets global performance standards.
Full CE Certification & IEC Compliance
All catalog circuit breakers, DC solar disconnects, surge protective devices (SPDs), and waterproof distribution boxes carry legitimate CE markings. Devices are extensively tested against IEC 60947-2, IEC 60898-1, and IEC 60439 standards for thermal rise, dielectric breakdown, and short-circuit withstand.
Flexible OEM/ODM & Ultra-Low MOQ
We eliminate supply chain barriers for regional electrical importers, solar EPCs, and distributors in Myanmar. Benefit from flexible trial orders starting at just 5 pieces, fully customized busbar routing, tailored multi-string combiner box configurations, and complete private label silk-screening.
24+
Years Industry Experience
5,700m²
Audited Production Area
92
Verified Technical Staff
US$3.3M
Verified Annual Export
13
Comprehensive Product Lines
Local Infrastructure Adaptations
Solving Engineering Challenges Across Myanmar's Electrical Grid
Operating electrical equipment in Myanmar requires specialized hardware capable of handling high humidity, continuous rainfall, widespread grid blackouts, and erratic voltage drops.
Off-Grid Commercial Solar & Agricultural Pumping
From commercial rooftop solar installations in Yangon's industrial parks (such as Hlaing Tharyar and Shwe Pyi Thar) to solar-powered deep-well irrigation systems across the Dry Zone (Mandalay, Sagaing, Magway), reliable DC circuit protection is essential. Our IP65 pre-wired combiner boxes integrate high-voltage DC MCBs (up to 1000V) and specialized DC SPDs that prevent catastrophic system fires sparked by unchecked DC arcing and localized lightning events during the monsoon season.
Automated Grid-to-Generator & Solar Backup Switching
With ongoing power load-shedding affecting municipal grids, businesses, retail outlets, telecom base stations, and healthcare clinics rely on hybrid combinations of national grid power, diesel generators, and battery energy storage. Our DIN-rail waterproof distribution boxes house TOQ3 series dual-power Automatic Transfer Switches (ATS) coupled with adjustable over-and-under voltage protectors. This pre-engineered assembly shields sensitive electronics from damaging voltage spikes upon grid restoration while facilitating seamless sub-second load handover.
Engineering White Paper
Technical Specification Matrix: Specifying Enclosures for Tropical Monsoons
Engineers and electrical contractors must evaluate technical specifications carefully to avoid premature equipment breakdown under 90%+ relative humidity and harsh outdoor temperatures.
| Operating Environment | Enclosure Class & Materials | Integrated Core Protection | Critical Risk Mitigations |
|---|---|---|---|
| Coastal & River Deltas (Yangon, Mawlamyine, Pathein) |
IP66 Polycarbonate / ABS alloy with seamless UV-stabilized polyurethane gasket seals. | AC Type 2 Incomer SPD (40kA, Up < 1.5kV) + Adjustable Over/Under Voltage Protector Relay. | High saline humidity induces dielectric creepage and tracking. Requires nickel-plated terminal lugs and anti-fungal terminal blocks. |
| High-Heat Interior Dry Zone (Mandalay, Meiktila, Magway) |
IK08 impact-resistant, high-temperature ABS enclosures rated for continuous 45°C ambient exposure. | DC MCBs (1000V DC, C-Curve) + Class I/II DC Surge Protectors + High-Amp DC Fuses. | Extreme solar radiation causes standard plastic housings to warp and crack, causing moisture ingress. Derating calculations required for internal thermal rise. |
| Highland & Hilly Terrains (Taunggyi, Shan State, Kachin) |
IP65 dust-tight, moisture-resistant enclosures with stainless steel external locking latches. | 4P Dual-Power ATS (isolating both phase lines and neutral) combined with 7-Day Digital Timers. | Frequent regional lightning strikes and weak earth grounding networks demand comprehensive multi-stage surge diversion on incoming power feeds. |
| Industrial Substation & Factories (Mingaladon, Thilawa SEZ) |
Heavy-duty modular multi-way (18-24 way) distribution boards with separated low-voltage and control compartments. | Molded Case Circuit Breakers (MCCB up to 630A) + WiFi smart monitoring circuit breakers with RS485 / Modbus output. | Motor switching surges and harmonic distortions cause erratic nuisance tripping. True-RMS sensing voltage protection ensures uptime. |
Market Dynamics & Trends
Emerging Distribution & Protection Trends in Myanmar
Structural power generation shifts are driving rapid modernization across Myanmar's localized distribution infrastructure.
Rapid Solar Hybrid Integration
With fuel prices volatile and municipal power availability intermittent, residential compounds and commercial enterprises are converting rapidly to solar-plus-storage topologies. This boom has triggered surging demand for pre-wired waterproof combiner boxes that unify DC protection, battery disconnects, and ATS hardware in a single compact enclosure.
Bluetooth & Smart Scheduling Relays
Local agricultural pump operators and commercial facilities increasingly deploy Bluetooth-enabled timer switches like the TOS7-B and TOS6-40. Technicians configure complex daily irrigation and diesel generator cycles directly via smartphones, avoiding complex wiring, specialized programming software, or physical adjustments in downpours.
Grid Fluctuations & Incomer Hardening
Unregulated voltage swings ranging from 140V to 280V across secondary substations require advanced consumer-side protection. Standard MCBs cannot protect against sustained over-voltage. Procurement is shifting rapidly toward distribution boxes factory-fitted with integrated digital voltage cut-off protectors featuring auto-recovery delay timers.
Procurement Knowledge Base
Frequently Asked Questions: Sourcing for the Myanmar Market
Direct technical and logistical answers for wholesale importers, electrical contractors, and local distributors.
What IP rating is truly required for outdoor electrical distribution in Myanmar?
For sheltered outdoor locations, an IP65 rating provides adequate protection against heavy monsoon rain and dust storms. However, for unsheltered solar arrays or open river port installations in southern Myanmar, an IP66 enclosure with high-elasticity polyurethane foam gaskets and IP68 cable glands is strongly recommended to prevent moisture ingress caused by wind-driven rain and extreme humidity condensation.
Why is a 4-Pole (4P) ATS critical rather than a 3-Pole (3P) unit for generator changeover?
In Myanmar, municipal transformer neutrals and standby diesel generator neutrals often have differing ground potential or floating voltages. Using a 3-Pole ATS leaves the neutral permanently connected, which can back-feed voltage, trip upstream ground-fault relays, and damage connected household electronics. A 4-Pole ATS completely isolates both live phases and the neutral conductor during switching, guaranteeing total isolation between grid and generator.
Can standard AC circuit breakers be installed inside DC solar combiner boxes?
No, never. Alternating Current (AC) naturally crosses zero voltage 50 or 60 times per second, allowing breaker arc chutes to extinguish arcs quickly. Direct Current (DC) has no natural zero-crossing; the arc burns continuously and intensely. If a standard AC breaker trips on high-voltage DC, it cannot extinguish the arc, causing the breaker housing to melt and potentially igniting the distribution box. Always insist on dedicated, polarized or non-polarized DC MCBs rated up to 1000V DC.
How does Zhejiang TMB Electric manage logistics and cross-border shipping into Myanmar?
We provide seamless export handling from our Wenzhou factory. Shipments can be routed by sea freight from Ningbo or Shanghai port directly to Yangon Port (Asia World Port Terminal / Myanmar Industrial Port), or dispatched via overland cross-border trucking through Yunnan (Ruili–Muse corridor) for rapid transit into Mandalay. We issue full commercial documentation, packing lists, CE test declarations, and Certificates of Origin for smooth customs clearance.
Can our company order custom pre-wired distribution boxes with private labeling?
Yes. As a direct manufacturer, Zhejiang TMB Electric specializes in custom OEM/ODM solutions. We configure waterproof distribution enclosures with exact breaker combinations, surge suppressors, ATS relays, digital kWh meters, and timer switches. We can silkscreen your registered brand logo, print custom multilingual packaging, and customize busbar thicknesses according to your engineering schematics with trial orders starting at just 5 units.
Upgrade Your Low-Voltage Reliability Today
Consult with our electrical engineering team to design custom IP65/IP66 waterproof distribution boxes, solar PV combiner systems, or ATS changeover enclosures tailored to your exact regional market requirements.