JH1A series universal terminal blocks

The combination screws are directly crimped, resulting in a simple structure and easy observation of the connection status.The spring washers in the combination screws deform during tightening, achieving a self-locking function.The wiring range is from 0.75mm² to 35mm².

Additional information

Place of Origin

Zhejiang,China

Color

grey

Mounting

Screw

Material of Shell

PC

Metal Material

brass conductor

The JH1A showcases a full range of models

JH1A-1.5

JH1A-1.5

Model
JH1A-1.5
Special color
Grey
Current
17.5A
Voltage
500V
Length/Width/High
44.5mmx38mmx7.5mm
single-strand conductor
0.75-1.5mm²
Multi-strand wire
0.75-1.5mm²
Contact Material
Copper
Baffle Partition
1.5G
Screw thread
M3

JH1A-2.5

JH1A-2.5

Model
JH1A-2.5
Special color
Grey
Current
24A
Voltage
500V
Length/Width/High
46.5mmx42.5mmx9.5mm
single-strand conductor
0.75-1.5mm²
Multi-strand wire
0.75-1.5mm²
Contact Material
Copper
Baffle Partition
2.5G
Screw thread
M4

JH1A-2.5S

JH1A-2.5S

Model
JH1A-2.5S
Special color
Grey
Current
17.5A
Voltage
500V
Length/Width/High
54mmx63.5mmx12mm
single-strand conductor
1-2.5mm²
Multi-strand wire
1-2.5mm²
Contact Material
Copper
Baffle Partition
2.5SG
Screw thread
M4

JH1A-2.5RD

JH1A-2.5RD

Model
JH1A-2.5RD
Special color
Grey
Current
20A
Voltage
380V
Length/Width/High
57mmx65.5mmx16mm
single-strand conductor
1-2.5mm²
Multi-strand wire
1-2.5mm²
Contact Material
Copper
Baffle Partition
2.5RGD
Screw thread
M4

JH1A-6

JH1A-6

Model
JH1A-6
Special color
Grey
Current
41A
Voltage
500V
Length/Width/High
52.5mmx43.5mmx13.5mm
single-strand conductor
2.5-6mm²
Multi-strand wire
2.5-6mm²
Contact Material
Copper
Baffle Partition
6G
Screw thread
M5

JH1A-10

JH1A-10

Model
JH1A-10
Special color
Grey
Current
57A
Voltage
500V
Length/Width/High
54mmx46.5mmx16.5mm
single-strand conductor
6-10mm²
Multi-strand wire
6-10mm²
Contact Material
Copper
Baffle Partition
10G
Screw thread
M5

JH1A-16

JH1A-16

Model
JH1A-16
Special color
Grey
Current
76A
Voltage
500V
Length/Width/High
54.5mmx46.5mmx19mm
single-strand conductor
10-16mm²
Multi-strand wire
10-16mm²
Contact Material
Copper
Baffle Partition
10G
Screw thread
M5

JH1A-25

JH1A-25

Model
JH1A-25
Special color
Grey
Current
101A
Voltage
500V
Length/Width/High
60.5mmx52mmx20mm
single-strand conductor
10-25mm²
Multi-strand wire
10-25mm²
Contact Material
Copper
Baffle Partition
2.5G
Screw thread
M8

JH1A-35

JH1A-35

Model
JH1A-35
Special color
Grey
Current
125A
Voltage
500V
Length/Width/High
66.5mmx52mmx24mm
single-strand conductor
16-36mm²
Multi-strand wire
16-36mm²
Contact Material
Copper
Baffle Partition
35G
Screw thread
M8

Why Choose Shengling JH1A Series Screw Terminal Blocks?

Shengling JH1A screw terminal blocks combine reliable connection, strong conductivity, and easy DIN rail installation for modern electrical systems.

Key Advantages:

  Pure copper conductor for stable and efficient conductivity
  Screw-clamp design for secure, vibration-resistant wiring
  Flame-retardant PA66 housing for higher safety and durability
  Compact structure for neat and efficient panel wiring
  Flexible DIN rail mounting for fast installation and maintenance
  Widely used in control cabinets, power distribution, automation, and industrial equipment

Shengling provides dependable terminal block solutions with quality, versatility, and long service life.

Key features of the product

Quenching nickel-plated screws has high torque and is not easy to slip.

The thickened pure copper conductive sheet is corrosion-resistant, reliable in contact, and highly conductive.

High-quality,flame-retard ant shell with good toughness and non-stop feet

High-quality imported insulation materials

The insulation material uses original imported nylon PA66, ensuring excellent insulation, flame retardancy, toughness, and aging resistance.
It has strong corrosion resistance, and the presence of termites, anaerobic bacteria, or fungi will not reduce its performance. It also exhibits excellent resistance to most oils and greases, alcohol, carbon tetrachloride, and other common detergents.

Convenient and flexible installation methods

The mounting feet are suitable for two mounting rail installation methods, with selectable rail widths of 35mm and 28mm.
When mounted on a 35mm rail, the unique mounting feet allow for easy installation and removal of the terminal from both sides.
When mounted on a 28mm rail, the terminal can only slide out from both ends of the rail, minimizing the risk of damage.

Usage conditions

>Ambient Temperature: -25°C to +55°C
>Relative Humidity: 90%
> Attitude: The altitude of the installation site should not exceed 200m. For terminal blocks used at altitudes above 2000 m, the effects of air cooling and the decrease in dielectric strength need to be considered, and the rated voltage will be correspondingly reduced.
>Installation Category: Class
>Pollution Degree: Level 3
Meets standards
>GB/T14048.7/8/18
> IEC60947-7-1/-2/-3
>UL1059

SMART TERMINAL SOLUTIONS

Empowering Electrical Connections With Innovation & Efficiency

Customized for R&D

  • Functional upgrades and structural optimizations
  • Dedicated mold design and rapid prototyping
  • Multi-scenario compatibility engineering

Certification and Support

  • International Compliance Documentation Guidance
  • Testing Organization Coordination and Standards Interpretation
  • Technical Documentation Localization

Flexible delivery

  • Finished Product/SKD Supply Options
  • Trial Order Verification Support
  • Priority Logistics from Key Ports

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How to Maintain Terminal Blocks

Regular Inspection

  • Regularly inspect terminal blocks for signs of wear, corrosion, or loose connections.

Clean Terminal Blocks Regularly

  • Use a soft brush and compressed air to clean terminal blocks and remove any dirt, dust, or debris that may accumulate on the contact points.

If Any Loose Connection Is Found

  • If any connection becomes loose, use a screwdriver to tighten the screws to the manufacturer’s recommended torque value. This helps ensure a safe and reliable electrical connection.

Check for Overheating

  • Inspect terminal blocks for signs of overheating, such as discoloration or deformation. Overheating may be caused by excessive current or poor contact resistance, and should be addressed promptly to prevent further damage.

Always Use Properly Sized Terminal Blocks

  • Be sure to select the correct size and type of terminal block according to the application requirements. Using undersized terminal blocks may lead to overheating, poor contact, and other issues.

Troubleshoot Faulty Connections

  • If a faulty connection occurs, check the wiring for short circuits, open circuits, or incorrect positioning. Use a multimeter or other diagnostic tools to identify the root cause of the problem.

Follow the Manufacturer’s Guidelines

  • Always follow the terminal block manufacturer’s instructions for installation, operation, and maintenance to ensure safe and reliable performance.
 

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