Miniaturization Continues in Terminal Blocks

Terminal blocks, which offer flexibility in organizing, securing and terminating wires, will continue to come in smaller and finer-pitch configurations as miniaturization remains a trend across applications. They come in types for mounting on DIN rails, panels or PCBs. In terms of termination, there are versions with spring or screw clamps, tab connections or IDC. The last one does not require stripping of insulation to expose wires, crimping or soldering them.

In China, terminal blocks with a pitch as tight as 1mm can be sourced. The range includes screw-in, plug-in, barrier or chassis- or PCB-mount, spring-loaded and DIN rail units with bigger pitches such as 1.2, 1.25, 1.5, 2, 2.5, 2.54, 3.5, 3.81 and 5mm. For vertical or horizontal mounting, they are available in two- to 60-pole variants designed to accept 16 to 28AWG wires.

Based on electrical properties, the choices are 9 to 400A rated current, and up to 1,000VDC rated voltage and 1,000mohm insulation resistance, with a typical withstand voltage of 2,000VAC. These connection terminals are rated to operate in -40 to 105 C. They meet safety standards, including CE, CQC, NF, RoHS, UL and VDE.

Customization remains widely offered and accounts for 30 to 60 percent of shipments from Chinese manufacturers, according to companies interviewed by Global Sources. As such, suppliers also accommodate buyers’ requests on using materials such as copper, steel, zinc, gold, PP and other plastic types, from domestic or foreign sources.

Input costs and terminal block prices are expected to stabilize in the coming months.

Terminal block, 15 or 20A rated current

Company: Keifo Electronic Co. Ltd

Keifo’s KF203 terminal block has 300 or 320V and 15 or 20A rated voltage and current, 20mohm maximum contact resistance, 2,000VAC/min withstand voltage and 500Mohm insulation resistance at 500VDC. Its operating temperature is -40 to 105 C. The minimum order requirement is 5,000 units and the lead time five days.

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Terminal block, 600V 25A-rated

Company: Keifo Electronic Co. Ltd

The TB250 terminal block from Keifo has a rated voltage of 600V, rated current of 25A, insulation resistance of 500Mohms at 500VDC, withstand voltage of 2,000VAC/min and operating temperature of -40 to 105 C. An order of at least 5,000 units is required and has a five-day lead time.

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Terminal block, two to 24 poles

Company: Xiamen GHGM Intelligent Technology Co. Ltd

Xiamen GHGM offers the GH0211, a terminal block available in two- to 24-pole variants. This 0.5mm-pitch unit, with copper alloy terminals and a UL94V-0-rated LCP housing, has 300VAC/DC, 10A rating, 100Mohm minimum insulation resistance and 500VAC rms/min dielectric withstand voltage. Its operating temperature is -40 to 105 C. This component meets CQC, IEC, RoHS, UL and VDE standards. The 1,000-unit minimum order has a seven-day lead time.

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Terminal block, accepts 12 to 24AWG wires

Company: Xiamen GHGM Intelligent Technology Co. Ltd

Xiamen GHGM’s GH0221 terminal block is compatible with 12 to 24AWG wires and has 450 or 600V, 20 or 32A rating and -40 to 105 C operating temperature. It is RoHS-compliant. A minimum order of 1,000 units is required. Lead time is seven days.

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Push-in terminal block, two to eight pins

Company: Yueqing Kaisen Electric Technology Co. Ltd

From Yueqing Kaisen, the VSE-102-A (773-102) is a Wago-compatible push-in terminal block with two, three, four, six or eight pins. It accepts 14 to 16AWG wires. This 400V-rated component can handle a maximum current of 27A. It is available in red, blue, black and yellow. An order of at least 100 units is required. Lead time is eight days.

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Terminal block, 3, 6, 10, 15A variants

Company: Yueqing Kaisen Electric Technology Co. Ltd

Yueqing Kaisen’s model H-4 is a terminal block made of PE, PP or nylon and with brass contacts. Based on rated current, there are 3, 6, 10 and 15A variants. This connection terminal is CE-approved and RoHS-compliant. The minimum order requirement is 100 units and the lead time eight days.

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