Weidmüller 1644000000 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Weidmüller 1644000000 is a 21-position terminal block header with male pins, featuring a shrouded 4-side design and 0.138" (4.60mm) pitch. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The part operates within IEC ratings of 12A at 125V and UL ratings of 10A at 300V, with through-hole solder termination and a 135° header orientation.

Substiute Parts

1644000000

WeidmüllerIn Stock: 7491644000000 Datasheet

Current PartRFQ

1643520000

WeidmüllerIn Stock: 8511643520000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Weidmüller 1644000000 is determined by the following critical parameters:

• Connector Type & Configuration: Header with male pins, shrouded 4-side design
• Position Count & Pitch: 21 positions at 0.138" (4.60mm) pitch
• Header Orientation: 135° angle
• Mounting & Termination: Through-hole solder termination
• Electrical Ratings: Current and voltage specifications (IEC and UL standards)
• Material & Compliance: PBT housing with UL94 V-0 flammability rating, copper alloy contacts with tin finish

The substitute part Weidmüller 1643520000 maintains identical mechanical configuration (21 positions, 4.60mm pitch, 135° orientation, shrouded 4-side design, through-hole solder termination) and material composition (PBT housing, UL94 V-0 rating, copper alloy contacts with tin finish). This part is classified as active and provides enhanced electrical performance with higher IEC ratings (15A at 320V) while maintaining UL compatibility (10A at 300V).

Parameter Comparison

Engineering Selection Recommendations

The Weidmüller 1643520000 is a direct mechanical and electrical substitute for the obsolete 1644000000. Both components share identical connector architecture, pitch, position count, and orientation, ensuring PCB footprint compatibility and mating interface consistency.

The substitute part offers the following advantages:

• Active Product Status: The 1643520000 is currently in active production, ensuring long-term availability and supply chain reliability compared to the obsolete 1644000000.
• Enhanced Electrical Performance: IEC ratings increase to 15A at 320V, providing greater margin for applications operating near the original part's 12A/125V specification.
• Extended Temperature Range: Operating range extends to -50°C, accommodating applications requiring lower temperature operation.
• Improved Environmental Protection: IP10 ingress protection rating provides additional protection against dust and foreign object ingress.
• RoHS Compliance: The substitute part meets RoHS requirements, supporting regulatory compliance for new designs and manufacturing processes.

Both parts maintain identical UL ratings (10A at 300V), material composition (PBT housing with UL94 V-0 flammability rating), and contact specifications (copper alloy with tin finish), confirming functional equivalence for existing applications.

Frequently Asked Questions (FAQ)

Q: Can the 1643520000 be used as a direct replacement for the 1644000000 in existing designs?

A: Yes. Both parts share identical mechanical configuration (21 positions, 4.60mm pitch, 135° orientation, shrouded 4-side design) and termination method (through-hole solder). PCB footprints are compatible, and mating interfaces are identical. The substitute part maintains all UL electrical ratings (10A at 300V) required for existing applications.

Q: What are the key differences between these two parts?

A: The primary differences are product status and enhanced specifications. The 1643520000 is active production versus the obsolete 1644000000. The substitute offers higher IEC ratings (15A at 320V versus 12A at 125V), extended operating temperature range (-50°C to 100°C versus -20°C to 100°C), IP10 ingress protection, and RoHS compliance. UL ratings remain identical at 10A/300V.

Q: Are there packaging differences between the main part and substitute?

A: Yes. The 1644000000 is supplied in standard packaging, while the 1643520000 is supplied in bulk packaging. This difference does not affect component functionality or electrical performance.

Q: Does the color difference between parts affect compatibility?

A: No. The 1644000000 is black and the 1643520000 is orange. Color is a visual identifier only and does not impact electrical performance, mechanical fit, or functional compatibility.

Q: What is the significance of the RoHS compliance status difference?

A: The 1643520000 is RoHS compliant, meeting restrictions on hazardous substances in electrical and electronic equipment. The 1644000000 RoHS status is not specified. For new designs and applications subject to RoHS regulations, the 1643520000 is the appropriate selection.

Q: Are the contact specifications identical between both parts?

A: Yes. Both parts feature copper alloy contacts with tin mating finish, ensuring identical contact resistance, durability, and electrical performance characteristics.