BlockMaster Electronics Industrial Terminal Blocks and Connectors

Technical selection and supply of BlockMaster Electronics terminal blocks, heavy-duty power blocks up to 380A, and PCB interconnect solutions for industrial OEMs.

BlockMaster HP Series High- and Medium-Power Terminal Blocks up to 380A

BlockMaster HP series high-power terminal blocks deliver heavy-duty electrical joints for power distribution panels, motor drives, and heating systems. Rated from 50A to 380A at 600V, they accommodate thick copper conductors, ring lugs, and flat busbars with dependable clamp force.

Continuous currents of 90A, 115A, 175A, 255A, and 380A with dielectric ratings up to 600V
Panel-mount and thru-panel configurations separating internal wiring from external power drops
High-torque slotted screw, hex socket, and threaded stud terminations for lugged cables
Molded UL94V-0 thermoplastic insulating bases with optional snap-on protective covers

BlockMaster Double-Row, Single-Row, and Tri-Barrier Terminal Strips

BlockMaster barrier blocks provide rugged multi-pole terminal junctions for non-conductive mounting surfaces inside electrical assemblies and cabinets. Robust insulating barriers prevent inter-terminal bridging, while current capacities from 10A to 75A withstand heavy vibrations.

Double-row strips with pitches of 7.5mm, 9.5mm, 11mm, 14mm, and 17.45mm rated 10A to 75A
Single-row and tri-barrier configurations with 6.35mm to 13mm spacing rated up to 50A at 300V
Turret terminal options engineered specifically for secure attachment on non-conductive surfaces
SEMS screw binder heads with captive lock washers and solder quick-connect spade lugs

BlockMaster PA Series Eurostyle Terminal Strips with 8mm to 14mm Pitch

BlockMaster PA series Eurostyle terminal strips offer flexible, modular wiring interconnects for control panels, junction boxes, and HVAC machinery. Formed from resilient polyamide with pitches from 8mm to 14mm, they handle currents up to 50A and can be cut down to any required pole count.

Pin pitches of 8mm, 10mm, 12mm, and 14mm supporting current loads from 17.5A up to 50A at 600V
Tough polyamide housing material easily cut into custom pole segments directly in the field
Dead-front recessed screw tunnels guarding technicians from accidental contact with live lines
Protective wire leaf clamps preventing fine-stranded conductor damage during screw torque

BlockMaster CBF Series Two-Piece Pluggable Terminal Blocks and Headers

BlockMaster CBF series pluggable terminal connectors combine pluggable cable plugs with mating PCB board headers for swift module swapping and field servicing. This two-piece design allows maintenance crews to disconnect multi-wire harnesses instantly without loosening individual conductor clamps.

Contact pitch options of 3.5mm, 3.81mm, 5.0mm, 5.08mm, 7.0mm, and 7.62mm with 2 to 25 poles
Operating current thresholds of 9A to 16A supporting working potentials up to 300V
Keyed connector shrouds eliminating cross-mating errors during field harness plug-in
Optional screw retention flanges locking plugs tightly against severe equipment vibration

BlockMaster PCB Screw Terminals and Wire Guard Board-Mount Connectors

BlockMaster through-hole and surface-mount PCB terminal blocks establish direct board-level terminations for power feeds and automation signals. The integrated phosphor-bronze wire guard leaf protects thin stranded wire conductors from direct screw friction during high-torque tightening.

Through-hole solder pins with 2.5mm to 10.16mm pitch handling currents from 12A up to 135A
Phosphor-bronze wire guard mechanism cushioning delicate strands against screw shear
Screwless spring-clamp PCB blocks delivering push-in wiring for signal connections
High-temperature polymer moldings compatible with industrial wave and reflow soldering

BlockMaster Copper and Aluminum Grounding Bus Bars and Distribution Bars

BlockMaster grounding bus bars and potential distribution assemblies are fabricated from high-conductivity electrolytic copper and tin-plated aluminum alloys. They establish low-impedance equipotential grounding points inside control cabinets, dissipating ground loops and electrical noise.

High-purity electrical copper and tin-plated aluminum bars providing corrosion immunity
Multi-tap screw terminal points accommodating grounding conductors from 0.5 to 35 mm²
Standoff insulating mounting brackets isolating grounding rails from cabinet steel walls
Standardized lengths and hole patterns for protective earth and neutral distribution

Company History of BlockMaster Electronics and Manufacturing Heritage Since 1994

Established in 1994 near Chicago in Elk Grove Village, Illinois, BlockMaster Electronics specializes in designing and manufacturing comprehensive terminal block solutions.

Across more than three decades of continuous engineering development, the firm has built a catalog encompassing over 9,500 individual part numbers, establishing a solid reputation as a dependable partner for electrical equipment manufacturers, control panel builders, and HVAC system designers.

Its domestic value-added center enables swift design modifications and rapid prototype fabrication tailored to customer project requirements.

Engineering Parameters of High-Power Blocks: Currents up to 380A at 600V Potential

The BlockMaster HP heavy-duty terminal block line delivers robust connectivity for power distribution lines operating at 90A, 115A, 175A, 255A, and 380A under alternating or direct voltage up to 600V.

Massive copper and brass terminal elements with electroplated protective plating minimize junction contact resistance and heat buildup.

The modules support direct base mounting on subpanels or thru-panel pass-through mounting through sheet-metal enclosures, ensuring complete dielectric separation between high-current inputs and sensitive low-voltage automation controls.

Double-Row Barrier Terminal Strips: Circuit Protection and Vibration Immunity

BlockMaster barrier terminal strips with Turret and Double Row insulator configurations withstand demanding operating conditions marked by heavy vibration and mechanical shocks.

Thick molded partitions made of UL94V-0 grade thermoplastic physically eliminate conductor shifting and accidental adjacent pole short circuits. High-torque binder screws equipped with SEMS captive spring washers prevent loosening during cyclic temperature shifts.

The strips attach securely to non-conductive mounting planes and machinery chassis.

PA Series Eurostyle Terminal Strips: Modular Field Sizing and Dead-Front Safety

The PA Eurostyle terminal strip family delivers compact, flexible multi-conductor junction capabilities with pin spacing from 8mm to 14mm for loads up to 50A.

Its resilient polyamide body withstands bending stress and allows panel assemblers to trim the strip down to any required pole count directly on the shop floor.

Recessed dead-front screw wells protect technicians from accidental contact with energized circuits, while internal leaf wire protectors safeguard fine multi-strand wire from screw shear.

CBF Series Two-Piece Pluggable Interconnects: Accelerating Field Servicing Cycles

BlockMaster CBF series pluggable terminal connectors implement a two-piece architecture combining removable cable plugs with mating pin headers soldered onto printed circuit boards.

This setup creates dependable multi-pole electrical joints rated up to 16A per position across 3.5mm to 7.62mm pitch options.

Polarized mechanical keying prevents inverted insertion during maintenance replacement, while optional screw retention flanges maintain circuit integrity under strong equipment shaking.

PCB Board-Mount Terminals and Protective Grounding Bus Bars: Signal Integrity

BlockMaster printed circuit board terminal blocks incorporate wire guard technology, where a resilient phosphor-bronze clamp distributes screw clamping force evenly without cutting into stranded wire cores. For swift installation, screwless push-in spring blocks are also provided.

When configuring cabinet bonding systems, high-conductivity copper and tin-plated aluminum bus bars establish low-impedance equipotential grounding to divert high-frequency interference away from microprocessors.

BlockMaster Electronics and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of BlockMaster Electronics and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.