Weidmüller 1786490000 Terminal Block - Equivalent & Substitute Parts

Part Overview

The Weidmüller 1786490000 is an 8-position wire-to-board terminal block with 0.300" (7.62mm) pitch, designed for horizontal mounting with through-hole PCB installation. This component features screw-clamp wire termination rated for 30 A at 300 V, accommodating wire gauges from 10-22 AWG. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and procurement planning.

Substiute Parts

1786490000

WeidmüllerIn Stock: 8561786490000 Datasheet

Current PartRFQ

1786420000

WeidmüllerIn Stock: 11971786420000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Weidmüller 1786490000 is determined by the following critical parameters:

• Electrical Compatibility: Current rating (30 A), voltage rating (300 V), and wire gauge acceptance must meet or exceed the original specification
• Mechanical Compatibility: Pitch (0.300" / 7.62mm), number of positions (8), mounting type (through hole), and mating orientation (horizontal with board) must be identical
• Termination Method: Screw-clamp wire termination with M3 thread and equivalent torque specification (0.5-0.6 Nm)
• Series Continuity: TOP4GS series designation ensures design compatibility within the product family

The Weidmüller 1786420000 qualifies as a direct substitute based on matching all critical mechanical and electrical parameters while offering extended wire gauge support and improved product status.

Parameter Comparison

Engineering Selection Recommendations

The Weidmüller 1786420000 is the qualified substitute for the obsolete 1786490000 based on the following engineering criteria:

Functional Equivalence: Both components share identical electrical ratings (30 A, 300 V), mechanical configuration (8 positions, 7.62mm pitch, through-hole mounting), and termination methodology (M3 screw clamp). PCB footprint compatibility is assured through matching pitch and mounting specifications.

Product Status Advantage: The 1786420000 maintains active production status, ensuring long-term availability and supply chain continuity. The obsolete status of the 1786490000 necessitates transition to an equivalent active component.

Compliance Enhancement: The substitute part carries RoHS compliance certification, meeting modern regulatory requirements. Both components maintain REACH unaffected status and EAR99 export classification.

Performance Enhancements: The 1786420000 extends wire gauge accommodation to 10-26 AWG (versus 10-22 AWG) and provides expanded operating temperature range to -50°C ~ 100°C (versus -20°C ~ 100°C), offering greater application flexibility without compromising core electrical or mechanical specifications.

Frequently Asked Questions (FAQ)

Q: Can the 1786420000 be used as a direct replacement for the 1786490000 in existing PCB designs?

A: Yes. Both components share identical pitch (7.62mm), position count (8), mounting type (through hole), and mating orientation (horizontal with board). PCB footprints are mechanically and electrically compatible. No design modifications are required.

Q: What are the key differences between these two terminal blocks?

A: The primary differences are product status (obsolete versus active), wire gauge range (10-22 AWG versus 10-26 AWG), operating temperature range (-20°C ~ 100°C versus -50°C ~ 100°C), and RoHS compliance status. All electrical ratings and mechanical dimensions remain identical.

Q: Are there any wire gauge limitations when substituting?

A: No. The substitute part accepts a wider wire gauge range (10-26 AWG) than the original (10-22 AWG). Existing installations using 10-22 AWG wire are fully compatible. The extended range provides flexibility for future applications.

Q: Does the substitute part require different mounting or assembly procedures?

A: No. Both components use identical M3 screw-clamp termination with matching torque specification (0.5-0.6 Nm). Assembly procedures, tooling, and installation techniques remain unchanged.

Q: What is the inventory status for the substitute part?

A: The 1786420000 has 1,177 pieces in new original stock, ensuring immediate availability. The obsolete 1786490000 has 772 pieces remaining in inventory.

Q: Are there any compliance or certification differences?

A: The substitute part (1786420000) carries RoHS compliance certification. Both components maintain REACH unaffected status and EAR99 export classification. The substitute meets current regulatory requirements for new designs and procurement.