Weidmüller 1748280000 Terminal Block Plug - Equivalent & Substitute Parts

Part Overview

The Weidmüller 1748280000 is a 28-position terminal block plug with female sockets, 0.138" (4.60mm) pitch, designed for 180° free-hanging in-line applications. This component features screwless spring cage tension clamp termination and operates across -50°C to 100°C. The part is classified as obsolete, making identification of active equivalent components essential for ongoing system maintenance and new design implementations.

Substiute Parts

1748280000

WeidmüllerIn Stock: 9471748280000 Datasheet

Current PartRFQ

1277990000

WeidmüllerIn Stock: 9321277990000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 1748280000 is based on the following critical parameters that must remain consistent:

• Position Count & Pitch: 28 positions at 0.138" (4.60mm) pitch ensures mechanical and electrical compatibility with existing mating connectors
• Connector Type: Female socket plugs with 180° wire entry maintain identical installation geometry
• Mounting Configuration: Free hanging in-line orientation preserves board-level integration
• Electrical Ratings: Current and voltage specifications must meet or exceed the original design requirements
• Termination Method: Spring-based screwless termination ensures tool-free wire insertion
• Material Compliance: RoHS compliance and UL94 V-0 flammability rating maintain regulatory alignment
• Wire Gauge Compatibility: Wire gauge ranges must accommodate the original specification range

The substitute part 1277990000 maintains these core parameters while offering enhanced electrical performance and active product status.

Parameter Comparison

Engineering Selection Recommendations

The 1277990000 serves as the active equivalent for the obsolete 1748280000. Selection is justified on the following basis:

Product Status: The 1277990000 maintains active product status, ensuring continued availability, technical support, and supply chain reliability. The original part's obsolete classification necessitates transition to an active alternative.

Mechanical Compatibility: Both parts maintain identical 28-position configuration at 0.138" (4.60mm) pitch with 180° free-hanging orientation, ensuring direct mechanical interchangeability with existing mating connectors and PCB layouts.

Electrical Performance: The 1277990000 provides enhanced electrical ratings (13.4A IEC vs. 10.3A, 320V IEC vs. 250V) and extended operating temperature range (-50°C to 120°C vs. -50°C to 100°C), supporting broader application requirements.

Regulatory Compliance: Both parts maintain RoHS compliance, UL94 V-0 flammability rating, and REACH unaffected status, preserving regulatory alignment across jurisdictions.

Termination Compatibility: While termination methods differ (spring cage tension clamp vs. leg spring push-in spring), both employ screwless spring-based mechanisms, maintaining tool-free installation characteristics.

Wire Gauge Consideration: The substitute accepts 16-26 AWG (0.14-1.5mm²), which encompasses the original 16-28 AWG range for standard applications. Wire gauges 27-28 AWG fall outside the substitute's specification and require verification for specific applications.

Frequently Asked Questions (FAQ)

Q: Can the 1277990000 directly replace the 1748280000 in existing installations?

A: Yes, for applications using wire gauges 16-26 AWG. The 28-position configuration, 4.60mm pitch, and 180° orientation are identical. Applications requiring 27-28 AWG wire must be evaluated separately.

Q: What are the key differences between these parts?

A: The primary differences are product status (active vs. obsolete), termination mechanism (leg spring push-in vs. spring cage tension clamp), and electrical ratings. The 1277990000 offers higher current capacity (13.4A IEC vs. 10.3A) and voltage rating (320V IEC vs. 250V), plus extended temperature range to 120°C.

Q: Are there any compatibility concerns with the mating connector?

A: No. Both parts maintain identical pitch, position count, and orientation. Existing mating connectors designed for the 1748280000 will interface with the 1277990000 without modification.

Q: What is the housing material difference?

A: The original uses Polybutylene Terephthalate (PBT), while the substitute uses Polyamide (PA66), Nylon 6/6, glass-filled. Both materials maintain UL94 V-0 flammability rating and are suitable for the specified operating temperature ranges.

Q: Does the wire strip length difference affect installation?

A: The 1277990000 specifies 10mm wire strip length versus 7mm for the original. This represents a minor difference in required wire preparation and does not affect electrical or mechanical compatibility.

Q: Are both parts RoHS compliant?

A: Yes. Both the 1748280000 and 1277990000 are RoHS compliant and REACH unaffected, maintaining regulatory compliance for EU and international markets.