EXBZ7-40 Manual Transfer Switch（MTS PC Class）
Compact Dual-Supply Switching from 16A to 40A — Four Positions, Zero Ambiguity
The EXBZ7-40 is a manual transfer switch (MTS) in PC class configuration, built for dual power supply and dual-circuit switching in small distribution boards and machine panels. Five current ratings from 16A to 40A share one compact 35mm DIN rail body, with clearly defined 1-0-2 positions, 1 to 4 poles and 12mm² terminals — a straightforward, mechanical way to switch between mains and standby, or between two feeds, without electronics to fail.
Model
EXBZ7-40 Series — Manual Transfer Switch (MTS PC Class)EXBZ7-40 (16A / 20A / 25A / 32A / 40A)
IEC/EN 60947-3 · 240/415V · 1-4P · 35mm DIN rail · IP20
Product Details
- Manual changeover for dual power supply or dual-circuit switching: rated current 16A, 20A, 25A, 32A and 40A.
- Rated voltage 240/415V, 50/60Hz; 1, 2, 3 or 4 poles with contact form 1-0-2.
- PC class: can be switched on and loaded without generating short-circuit current — short-circuit protection is provided upstream.
- Flame-retardant nylon housing, IP20, 12mm² terminals, 1500 electrical / 8500 mechanical cycles.
Product Information
Key Features & Typical Use
Five Ratings, One Footprint
From a 16A lighting sub-panel to a 40A single-phase board, the EXBZ7-40 family shares the same housing and mounting footprint — stock one body, cover five ratings, and keep the panel layout identical between versions.
Clearly Defined Positions
The handle moves through 1-0-2 only: source 1, off, source 2. There is no ambiguous intermediate state and no electronic logic to misread, which is exactly what maintenance electricians want when isolating a supply for service.
PC Class Switch Disconnector Duty
As a PC class device the switch is rated to switch on, load and break circuits under normal conditions and to act as a switch disconnector — making it suitable as the load-break isolation point of a dual-supply arrangement when backed by an upstream protective device.
Panel-Friendly Termination
12mm² terminals and TS-35mm DIN rail mounting keep wiring quick in small enclosures, with the busbar-entry positions that suit bus-mounted domestic and small commercial boards.
Specifications
| Parameter | Details |
|---|---|
| Series | EXBZ7-40 Manual Transfer Switch (MTS, PC class) |
| Rated Current | 16A / 20A / 25A / 32A / 40A |
| Rated Voltage | 240/415V |
| Rated Frequency | 50/60Hz |
| Number of Poles | 1, 2, 3, 4P |
| Contact Form | 1-0-2 |
| Class | PC class — switched on and loaded without generating short-circuit current |
| Electrical Life | 1500 cycles |
| Mechanical Life | 8500 cycles |
| Terminal / Cable Size | 12mm² |
| Mounting | DIN rail EN 60715 (35mm) with fast clip device |
| Protection Degree | IP20 |
| Ambient Temperature | -5°C to +40°C |
| Housing Material | Flame-retardant nylon |
| Standard | IEC/EN 60947-3 |
| Typical Function | Dual power supply changeover · dual-circuit switching · switch disconnector |
EXBZ7-40 — Mechanical Changeover for Small Boards Where Simplicity Wins
Not every dual-supply installation needs a controller. In a small commercial board, a workshop sub-panel or a machine with two incoming feeds, the practical requirement is simply: choose source 1 or source 2, be certain which one is live, and be able to isolate both. The EXBZ7-40 meets that with a mechanical transfer switch — a 1-0-2 handle position, visible contact state and no circuit that can drift out of calibration.
The family covers 16A to 40A in the same body, in 1P through 4P versions, so the same part family serves single-phase lighting changeover, three-phase motor feeds and four-pole arrangements where the neutral is switched as well. Rated 240/415V at 50/60Hz with 12mm² terminals and IP20 protection, it installs on a standard 35mm rail in minutes with the fast clip device.
HUYU manufactures the EXBZ7-40 at our own factory and supplies manual transfer switches to panel builders, electrical distributors and OEM equipment makers at factory-direct prices, with OEM marking, mixed-rating containers and IEC/EN 60947-3 documentation.
Factory-Direct OEM / ODM Manufacturer
We Manufacture, You Brand
The EXBZ7-40 is produced in our switchgear workshop, where contact assemblies are riveted and the operating mechanism is cycled before assembly. Each batch is sampled for mechanical operation, contact continuity across all four handle positions and terminal torque.
For OEM customers the housing can be marked with your brand and the contact configuration confirmed before production.
- OEM branding — housing marking, labels and cartons for panel and equipment brands.
- ODM options — pole counts, current ratings and handle configurations built to your specification.
- Quality documentation — IEC/EN 60947-3 test records and routine inspection sheets with each batch.
- MOQ — mixed 16-40A ratings and 1-4P versions accepted in one order.
Buying Guide
Sizing a manual transfer switch is a three-step job: match the current to the load, match the poles to the wiring system, and confirm the upstream protection — because a PC class switch does not clear short circuits itself.
- Add up the load current and select 16A / 20A / 25A / 32A / 40A with margin.
- Choose the pole count: 1P lighting changeover, 2P single-phase with neutral, 3P three-phase, 4P three-phase with neutral.
- Confirm the upstream protective device (fuse or breaker) that provides short-circuit protection.
- Check terminal capacity — 12mm² accommodates typical sub-panel cabling.
- Plan the handle position for isolation and label both sources clearly at commissioning.
- Order samples and confirm OEM marking before mass production.
- Production with routine testing; wholesale orders shipped globally.
How We Support Your Business
OEM / ODM
Custom marking, pole configurations and rating sets on the EXBZ7-40 platform, with IEC/EN 60947-3 test documentation.
Housing marking · Pole variants · Test records
Wholesale
Factory-direct pricing with mixed 16-40A ratings in one container for distributors serving panel builders and electricians.
Factory pricing · Mixed ratings · Global shipping
Distributor Support
Selection tables covering ratings, poles and terminal capacity, plus priority production for channel partners.
Selection tables · Priority lead times
Ready to Stock the EXBZ7-40 Series?
OEM/ODM, wholesale pricing and distributor support — one enquiry gets you a factory-direct quotation for 16-40A manual transfer switches in 1, 2, 3 and 4 pole versions.
Frequently Asked Questions
What is a manual transfer switch (MTS)?
A manual transfer switch is a hand-operated changeover device that connects a load to one of two power sources. The operator selects source 1 or source 2 by moving the handle through the off position, so the two supplies can never be connected to each other. The EXBZ7-40 provides this function mechanically, without relays or controllers — suited to installations where a person is present to make the changeover.
What does the ‘1-0-2’ contact form mean?
It describes the three handle positions: 1 = connected to source 1, 0 = off (both sources isolated from the load), 2 = connected to source 2. Because there is a definite off position between the two sources, the switch provides a break-before-make transfer, preventing any cross-connection between mains and standby supply.
What is PC class in IEC/EN 60947-3?
IEC/EN 60947-3 classifies switches by their short-circuit making and breaking capability. A PC class switch is rated to switch on, carry and break currents under normal conditions but is not rated to make or break short-circuit currents — it must be protected by an upstream device. That makes the EXBZ7-40 ideal as a load-break changeover and isolating switch behind a fuse or circuit breaker.
How do I choose between 1P, 2P, 3P and 4P versions?
Use 1P for single-phase changeover of one line (e.g. lighting circuits), 2P for single-phase with neutral switching, 3P for three-phase loads without neutral, and 4P for three-phase systems that switch the neutral as well — common in installations where isolation of all conductors is required for maintenance.
Can the EXBZ7-40 be used as a main switch or isolator?
Yes. Because it operates as a switch disconnector under IEC/EN 60947-3, it can serve as a load-break isolating device for a sub-circuit or a small board, provided the upstream protective device covers short-circuit conditions and the rated current is not exceeded in continuous operation.
