Weidmüller 0478900000 Terminal Block: Equivalent & Substitute Parts

Part Overview

The Weidmüller 0478900000 is a 3-position wire-to-board terminal block designed for vertical mounting with through-hole PCB attachment. This component features a 10.16mm pitch, screw-clamping wire termination, and rated for 40A at 300V operation. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations where legacy compatibility is not required.

Substiute Parts

0478900000

WeidmüllerIn Stock: 8610478900000 Datasheet

Current PartRFQ

2492120000

WeidmüllerIn Stock: 9422492120000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Weidmüller 0478900000 is determined by the following critical parameters:

• Positions Per Level: Must remain 3 positions to maintain PCB layout compatibility
• Mounting Type: Must be through-hole to ensure mechanical fit with existing PCB designs
• Mating Orientation: Must be vertical with board to preserve connector approach angle and assembly procedures
• Wire Termination Compatibility: Screw-based or screwless termination methods may be acceptable depending on assembly process requirements
• Electrical Ratings: Substitute parts must meet or exceed the 40A current and 300V voltage requirements
• Wire Gauge Acceptance: Substitute parts must accommodate the 8-26 AWG wire range or a compatible subset

The Weidmüller 2492120000 qualifies as a functional substitute based on matching positions, mounting type, and mating orientation. However, differences in pitch, electrical ratings, wire termination method, and wire gauge range must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The Weidmüller 2492120000 is an active product with current manufacturing support, making it suitable for applications where the 0478900000 is no longer available. Both parts are RoHS compliant and manufactured by Weidmüller, ensuring consistent quality standards.

Selection of the 2492120000 as a substitute requires verification of the following application-specific factors:

• Pitch Tolerance: The 0.16mm pitch difference (10.16mm vs. 10.00mm) must be evaluated against PCB layout constraints and connector spacing requirements
• Wire Gauge Range: The substitute accepts 4-18 AWG wire, which does not accommodate the larger 8 AWG wire specified for the original part. Applications requiring 8 AWG termination cannot use this substitute
• Termination Method: The transition from screw-based to screwless push-in termination requires assembly process modification and operator training
• Electrical Headroom: The 2492120000 provides higher current (57A vs. 40A) and voltage (1000V vs. 300V) ratings, suitable for applications with equivalent or lower electrical demands
• Temperature Range: The extended upper temperature limit (120°C vs. 100°C) provides additional operational margin

Frequently Asked Questions (FAQ)

Q: Can the Weidmüller 2492120000 be used as a direct replacement for the 0478900000 in existing PCB designs?

A: Direct replacement requires PCB layout verification. The 0.16mm pitch difference may cause alignment issues with existing through-hole patterns. Physical fit testing is necessary before production implementation.

Q: What is the primary difference in wire termination between these parts?

A: The 0478900000 uses screw-clamping termination with a tension sleeve, requiring a screwdriver and torque specification (1.2 Nm). The 2492120000 uses screwless push-in spring termination, eliminating the need for tools and torque control but requiring different assembly procedures.

Q: Is the 2492120000 suitable for applications requiring 8 AWG wire termination?

A: No. The 2492120000 accepts 4-18 AWG wire, which does not include 8 AWG. Applications requiring 8 AWG termination must use the original 0478900000 or identify an alternative part with compatible wire gauge specifications.

Q: What are the compliance and certification implications of substitution?

A: Both parts are RoHS compliant and carry identical ECCN (EAR99) and HTSUS (8536.90.4000) classifications. Substitution does not introduce compliance complications from a regulatory standpoint.

Q: How does the voltage rating difference affect substitution suitability?

A: The 2492120000 is rated for 1000V compared to the 0478900000's 300V rating. This higher rating provides additional safety margin for applications operating at or below 300V. No derating is required for equivalent voltage applications.

Q: Are there packaging differences between these parts?

A: The 0478900000 packaging is listed as unspecified, while the 2492120000 is supplied in bulk packaging. Procurement and inventory management procedures may require adjustment based on bulk packaging requirements.