Terminal-Block Integrated Shells

Pre-wired junction platforms for simplified motor connectivity

Motor housings with factory-installed terminal blocks, junction boxes, or connector panels — eliminating separate enclosure mounting and reducing field wiring labour. Designed for industrial drives, HVAC, and pump applications where rapid electrical connection and maintenance access are required.

IEC 56–160 NEMA 42–210 IP55–IP66 Custom terminal layouts

Integration Factory-installed terminal blocks

Terminal blocks are mounted directly to the housing shell during assembly, with internal wiring pre-routed to the motor leads. This eliminates the need for separate junction boxes on the equipment frame.

Protection Sealed junction compartments

Junction areas are gasketed and sealed against dust and moisture ingress. IP55, IP65, and IP66 ratings are available depending on the application environment.

Flexibility Multiple terminal configurations

Support for screw-clamp, spring-cage, or push-in terminals. Terminal counts from 3 to 12 poles, with options for grounding terminals and neutral bars.

Product specifications

Frame size range	IEC 56 – 160 (NEMA 42–210 with adapter options)
Terminal block type	Screw-clamp, spring-cage, or push-in (customer selection)
Terminal count	3 – 12 poles (custom layouts available)
Wire gauge capacity	0.5 mm² – 16 mm² (dependent on terminal type)
Junction enclosure rating	IP55, IP65, or IP66 (gasketed)
Internal wiring	Pre-wired to motor leads with colour-coded insulation
Shell material	DC01, SPCC, or S235JR (1.5 – 4.0 mm thickness)
Surface coating	Zinc phosphate + e-coat (standard); powder coating optional
Flange flatness	≤ 0.06 mm per 100 mm

Terminal type Screw / spring / push-in Poles 3 – 12 Ingress protection IP55 – IP66 Coating E-coat / powder Wiring Pre-installed

Engineering & installation advantages

Reduced field labour: Terminal blocks are pre-mounted and internally wired at the factory, minimising on-site electrical work.
Space saving: Eliminates separate junction boxes mounted on equipment frames, reducing overall footprint.
Service accessibility: Junction covers are positioned for easy access during inspection, maintenance, or re-termination.
Custom layouts: Terminal positions, entry angles, and cover orientations can be tailored to match customer wiring harnesses.

Quality & supply chain

First-pass yield > 98 % on terminal positioning and electrical continuity (Cpk ≥ 1.67).
Dielectric strength tested at 1500 V AC for 1 minute per IEC 60034.
Material certificates EN 10204 3.1 and dimensional inspection report per batch.
Lead time: 18–22 working days for standard configurations; 28–35 days for custom terminal layouts or special ingress ratings.
PPAP level 3 available for automotive and high-reliability applications.

Application fields

Industrial motors: Pumps, compressors, fans, and conveyors — where quick electrical connection and maintenance access reduce downtime.
HVAC systems: Air handling units, chillers, and rooftop equipment — where space constraints favour integrated junction solutions.
Water and wastewater: Submersible and vertical motors requiring sealed junction compartments for moisture protection.
Material handling: Overhead cranes, hoists, and automated guided vehicles — where cable management and rapid termination are critical.

For custom terminal configurations, Yufeng provides electrical schematic review, terminal layout drawings, and sample wiring verification prior to production.

Engineering support

Frequently asked questions

What terminal block types are available?

We offer screw-clamp terminals (standard), spring-cage terminals for vibration resistance, and push-in terminals for rapid wiring. All are rated for continuous operation at the motor's full load current.

Can the junction cover orientation be customised?

Yes. Cover entry angles (top, side, or bottom) and opening directions can be tailored to match cable entry routes in your equipment. We provide dimensional drawings for approval.

What ingress protection ratings are available?

Standard configurations are IP55 (dust-protected and water-jet resistant). IP65 (dust-tight and low-pressure water-jet) and IP66 (dust-tight and high-pressure water-jet) are available for harsh environments.

Are the internal wires pre-terminated to the motor leads?

Yes. We pre-wire the terminal blocks to the motor leads at the factory, with colour-coded insulation and crimped terminals. This reduces field wiring time and eliminates potential connection errors.

What electrical testing is performed on the terminal assembly?

Each unit undergoes dielectric strength testing (1500 V AC for 1 minute), insulation resistance testing (≥ 50 MΩ at 500 V DC), and continuity verification for all terminal connections.

For terminal layout drawings, electrical schematics, and sample orders, contact the Yufeng engineering team. DFM and electrical design feedback are provided within 48 hours for new integrated shell configurations.

Professional Motor Housing
Manufacturing Solutions

Company Profile

Jiangsu Yufeng Electric Co., Ltd. is a China Terminal-Block Integrated Shells Manufacturers and Custom Terminal-Block Integrated Shells Suppliers. Our products are widely used in household appliances, industrial drives, new energy vehicles, and special equipment.

We offer full-process manufacturing capabilities from steel processing to finished product delivery, supported by stamping lines, automated welding equipment, machining facilities, and inspection instruments. Backed by an engineering team with an average of over 20 years of experience, we provide technical support from development to mass production.

With 40 years of focus on motor housing manufacturing, we have served more than 50 customers and achieved an annual production capacity of over 5 million units. Guided by quality, efficiency, and fast response, we are committed to delivering high-precision and high-reliability motor housing solutions.