Harwin D0724-01 24-Position DIP Socket - Equivalent & Substitute Parts

Part Overview

The Harwin D0724-01 is a 24-position DIP socket designed for IC and transistor applications with 0.4" (10.16mm) row spacing. This component features gold-plated mating contacts, wire wrap termination, and through-hole mounting. The D0724-01 is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Number of Positions	24 (2 x 12)
Row Spacing	0.4" (10.16mm)
Pitch - Mating	0.100" (2.54mm)
Pitch - Post	0.100" (2.54mm)
Contact Finish - Mating	Gold
Contact Material - Mating	Beryllium Copper
Mounting Type	Through Hole
Termination	Wire Wrap
Operating Temperature Range	-55°C ~ 125°C
Current Rating	1 A
Contact Resistance	10mOhm
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

The Preci-Dip 122-87-424-41-001101 qualifies as a direct substitute for the Harwin D0724-01 based on the following critical parameters:

Position Count & Spacing: Both parts provide 24 positions in a 2 x 12 configuration with 0.4" (10.16mm) row spacing
Pitch Specifications: Mating pitch of 0.100" (2.54mm) and post pitch of 0.100" (2.54mm) are identical
Contact System: Both use beryllium copper mating contacts with gold plating and brass posts with tin plating
Mounting & Termination: Through-hole mounting with wire wrap termination on both parts
Electrical Performance: Current rating of 1 A and contact resistance of 10mOhm match across both parts
Temperature Range: Operating temperature range of -55°C ~ 125°C is identical
Flammability: Both parts meet UL94 V-0 material flammability rating

Parameter Comparison

Parameter	Harwin D0724-01	Preci-Dip 122-87-424-41-001101
Manufacturer	Harwin Inc.	Preci-Dip
Product Status	Obsolete	Active
Number of Positions	24 (2 x 12)	24 (2 x 12)
Row Spacing	0.4" (10.16mm)	0.4" (10.16mm)
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Pitch - Post	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish - Mating	Gold (10.0µin / 0.25µm)	Gold (Flash)
Contact Material - Mating	Beryllium Copper	Beryllium Copper
Mounting Type	Through Hole	Through Hole
Termination	Wire Wrap	Wire Wrap
Termination Post Length	0.510" (12.95mm)	0.370" (9.40mm)
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	1 A	1 A
Contact Resistance	10mOhm	10mOhm
Material Flammability Rating	UL94 V-0	UL94 V-0
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The Preci-Dip 122-87-424-41-001101 is the qualified substitute for the obsolete Harwin D0724-01. The substitute part maintains electrical and mechanical compatibility across all critical parameters including position count, pitch specifications, contact materials, and operating temperature range.

The primary distinction is product status: the Harwin D0724-01 is obsolete, while the Preci-Dip 122-87-424-41-001101 is active and currently in production. Additionally, the Preci-Dip part achieves ROHS3 compliance, whereas the original Harwin part is RoHS non-compliant.

A secondary consideration is termination post length: the Harwin part specifies 0.510" (12.95mm) while the Preci-Dip substitute provides 0.370" (9.40mm). This difference must be evaluated against specific PCB design requirements and wire wrap tooling specifications.

Frequently Asked Questions (FAQ)

Q: Can the Preci-Dip 122-87-424-41-001101 be used as a direct replacement for the Harwin D0724-01 in existing designs?

A: Yes, the Preci-Dip part is electrically and mechanically compatible. Both parts share identical position counts, pitch specifications, contact materials, and operating temperature ranges. The primary design consideration is the difference in termination post length (0.510" vs. 0.370"), which must be verified against PCB hole depth and wire wrap equipment specifications.

Q: What is the significance of the gold contact finish difference between the two parts?

A: The Harwin D0724-01 specifies a gold finish thickness of 10.0µin (0.25µm), while the Preci-Dip 122-87-424-41-001101 uses a flash gold finish. Both provide gold mating contact surfaces for reliable electrical connection. Flash plating is a thin, uniform coating applied to enhance contact performance and corrosion resistance.

Q: Are there compliance differences between these parts?

A: Yes. The Preci-Dip 122-87-424-41-001101 is ROHS3 compliant, while the Harwin D0724-01 is RoHS non-compliant. Both parts are REACH unaffected and carry the same UL94 V-0 flammability rating. The RoHS compliance status of the substitute part may be advantageous for applications subject to environmental regulations.

Q: What is the impact of the post length difference on PCB design?

A: The Harwin D0724-01 has a termination post length of 0.510" (12.95mm), while the Preci-Dip substitute is 0.370" (9.40mm). This 0.140" (4.65mm) difference affects wire wrap depth and PCB hole specifications. Verify that existing PCB designs accommodate the shorter post length or confirm that wire wrap tooling can function with the reduced insertion depth.

Q: Are both parts available in the same packaging format?

A: The Harwin D0724-01 packaging is not specified in the provided data. The Preci-Dip 122-87-424-41-001101 is supplied in bulk packaging. Confirm packaging requirements for your procurement and assembly processes.

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