DF13A-4P-1.25H(77) Equivalent & Substitute Parts

Part Overview

The DF13A-4P-1.25H(77) is a surface mount, right-angle rectangular connector header manufactured by Hirose Electric Co Ltd. This 4-position connector operates at 1.25mm pitch and is designed for board-to-cable/wire applications with solder termination and detent lock fastening. The part is currently listed as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design and procurement requirements.

Substiute Parts

DF13A-4P-1.25H(77)

Hirose Electric Co LtdIn Stock: 1189DF13A-4P-1.25H(77) Datasheet

Current PartRFQ

DF13A-4P-1.25H(51)

Hirose Electric Co LtdIn Stock: 2129DF13A-4P-1.25H(51) Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DF13A-4P-1.25H(77) is determined by strict equivalence across the following critical parameters:

• Connector Type & Contact Configuration: Header with male pins
• Position Count & Pitch: 4 positions at 0.049" (1.25mm) mating pitch
• Mounting & Orientation: Surface mount, right-angle configuration
• Electrical Ratings: 1A current and 150V voltage ratings
• Termination Method: Solder termination with detent lock fastening
• Material & Environmental Compliance: Polyamide insulation, UL94 V-0 flammability rating, operating range -35°C to 85°C

The DF13A-4P-1.25H(51) meets all these criteria and is designated as the manufacturer-recommended substitute. The primary distinction between these parts is product status and packaging configuration.

Parameter Comparison

Engineering Selection Recommendations

The DF13A-4P-1.25H(51) is the direct functional equivalent of the DF13A-4P-1.25H(77). Both parts share identical electrical and mechanical specifications across all critical parameters. The substitute part offers the following advantages:

• Active Product Status: The DF13A-4P-1.25H(51) is currently in active production, ensuring long-term availability and supply chain stability.
• Enhanced Compliance: ROHS3 compliance provides alignment with current regulatory requirements, compared to the RoHS Compliant designation of the obsolete variant.
• Packaging Configuration: Tape & Reel packaging is standard for high-volume manufacturing and automated assembly processes.

Selection of the DF13A-4P-1.25H(51) eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Are the DF13A-4P-1.25H(77) and DF13A-4P-1.25H(51) electrically interchangeable?

A: Yes. Both parts are rated for 1A at 150V and operate across the identical temperature range of -35°C to 85°C. Electrical performance is equivalent.

Q: What is the difference between the part numbers?

A: The suffix designation (77 versus 51) indicates packaging and product status. The (77) variant is obsolete, while the (51) variant is active production with Tape & Reel packaging.

Q: Can I use the DF13A-4P-1.25H(51) as a direct replacement on existing PCBs?

A: Yes. The mounting type, orientation, pitch, position count, and solder termination are identical. No PCB redesign is required.

Q: What is the significance of the contact finish thickness difference?

A: The DF13A-4P-1.25H(77) specifies 30.0µin (0.76µm) gold plating, while the DF13A-4P-1.25H(51) specifies 8.00µin (0.203µm). Both thicknesses meet functional requirements for the 1A/150V rating and provide equivalent contact reliability.

Q: Are there any compliance differences between these parts?

A: The DF13A-4P-1.25H(51) carries ROHS3 compliance, representing current regulatory alignment. Both parts maintain UL94 V-0 flammability rating and MSL 1 moisture sensitivity classification.

Q: What packaging should I specify for new designs?

A: Specify the DF13A-4P-1.25H(51) with Tape & Reel packaging for automated assembly compatibility and supply chain continuity.