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Twenty green plastic blocks with silver screw terminals arranged in four-pin rows

Unique-Bargains

Unique-Bargains 20Pcs 300V 3.81mm 4-Pin PCB Screw Terminal Block Connector

SKU CH-9NDX-NC426

Pack of 20 four-pin PCB screw terminal blocks rated 300 V with 3.81 mm pitch for secure wire-to-board connections

  • 4-position design simplifies wiring layouts
  • 81 mm pitch fits compact PCB footprints
  • 300 V rating supports mains-level circuits
  • Screw terminals allow quick install and removal
  • Pack of 20 covers multiple project builds

20-Piece 300 V Terminal Blocks

This pack contains twenty four-pin PCB screw terminal blocks rated for 300 V AC. They suit hobbyists, repair technicians and small-scale assemblers who need reliable wire-to-board connections for prototyping or maintenance work.

3.81 mm Pitch and DIN Rail Option

The 3.81 mm pin spacing matches standard protoboard layouts, while the integrated DIN rail adapter allows quick mounting inside enclosures. Screw terminals make installation and removal straightforward without special tools.

Four-Position Capacity and Limits

Each block accepts four conductors in a 16 mm by 12 mm footprint, handling typical low-power signal and control wiring. They are not suited for high-current power distribution or applications requiring more than four connections per block.

How it compares

Measured against everything we stock in Wire Connectors & Cable Ties, at today’s prices. Recalculated every night.

Price $7.99
Cheaper than about 70% of the 1,040 comparable items (median $13.99).

Specifications

Product
Brand nameUnique Bargains

Questions about this item

Will the 3.81 mm pitch screws need periodic retightening after thermal cycling?

The screw terminals use a 3.81 mm pitch and metal contacts designed for repeated installation and removal, so connections stay secure without a scheduled retightening interval.

What limits continuous current on these 300 V blocks before they overheat?

The rated voltage is AC 300 V and the housing measures 16 mm × 12 mm × 15 mm; sustained loads that raise the plastic body above its melting point will be the first thermal limit.

Do the green plastic housings get hot or emit noise when powered all day?

The connectors are passive components with no moving parts or active electronics, so they produce no audible noise and only warm slightly under normal rated current.

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