D0818-01 Equivalent & Substitute Parts

Part Overview

The D0818-01 is an 18-position DIP socket manufactured by Harwin Inc., designed for through-hole mounting applications. This component features gold-plated beryllium copper mating contacts with wire wrap termination and operates across the -55°C to 125°C temperature range. The D0818-01 is classified as obsolete, making identification of active equivalent parts essential for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Number of Positions	18 (2 x 9)
Type	DIP, 0.3" (7.62mm) Row Spacing
Pitch - Mating	0.100" (2.54mm)
Contact Finish - Mating	Gold
Contact Material - Mating	Beryllium Copper
Mounting Type	Through Hole
Termination	Wire Wrap
Operating Temperature	-55°C ~ 125°C
Current Rating	1 A
Contact Resistance	10mOhm
Housing Material	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester, Glass Filled
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution of the D0818-01 is determined by strict equivalence across the following critical parameters:

Number of positions and grid configuration: 18 (2 x 9)
DIP socket type with 0.3" row spacing
Mating pitch: 0.100" (2.54mm)
Gold contact finish on mating side
Beryllium copper mating contact material
Through-hole mounting with wire wrap termination
Operating temperature range: -55°C ~ 125°C
Current rating: 1 A
Contact resistance: 10mOhm
UL94 V-0 flammability rating

Two substitute parts meet these criteria: the D0818-42 (Harwin Inc., active status) and the 122-87-318-41-001101 (Preci-Dip, active status). Both maintain electrical and mechanical compatibility with the original D0818-01 specification.

Parameter Comparison

Parameter	D0818-01 (Main)	D0818-42 (Harwin)	122-87-318-41-001101 (Preci-Dip)
Manufacturer	Harwin Inc.	Harwin Inc.	Preci-Dip
Product Status	Obsolete	Active	Active
Number of Positions	18 (2 x 9)	18 (2 x 9)	18 (2 x 9)
Type	DIP, 0.3" (7.62mm) Row Spacing	DIP, 0.3" (7.62mm) Row Spacing	DIP, 0.3" (7.62mm) Row Spacing
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish - Mating	Gold	Gold	Gold
Contact Finish Thickness - Mating	10.0µin (0.25µm)	10.0µin (0.25µm)	Flash
Contact Material - Mating	Beryllium Copper	Beryllium Copper	Beryllium Copper
Mounting Type	Through Hole	Through Hole	Through Hole
Termination	Wire Wrap	Wire Wrap	Wire Wrap
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	1 A	1 A	1 A
Contact Resistance	10mOhm	10mOhm	10mOhm
Housing Material	PCT, Polyester, Glass Filled	PCT, Polyester, Glass Filled	PCT, Polyester, Glass Filled
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Termination Post Length	0.510" (12.95mm)	0.510" (12.95mm)	0.370" (9.40mm)

Engineering Selection Recommendations

The D0818-42 from Harwin Inc. is the primary substitute for the D0818-01. Both parts share identical electrical and mechanical specifications, including mating contact finish thickness (10.0µin), termination post length (0.510"), and all critical performance parameters. The D0818-42 maintains active product status and achieves ROHS3 compliance, addressing regulatory requirements that the obsolete D0818-01 does not meet.

The 122-87-318-41-001101 from Preci-Dip provides an alternative substitute with full electrical compatibility. This part differs in two mechanical aspects: mating contact finish is specified as flash rather than 10.0µin thickness, and termination post length is 0.370" (9.40mm) versus 0.510" (12.95mm). These dimensional differences require verification against specific PCB design requirements before selection. The 122-87-318-41-001101 also achieves ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the D0818-42 be used as a direct replacement for the D0818-01?

A: Yes. The D0818-42 maintains identical electrical specifications, contact materials, mating pitch, row spacing, and termination type. Both parts are 18-position DIP sockets with 0.100" mating pitch and 0.3" row spacing. The primary difference is product status: D0818-42 is active and ROHS3 compliant, while D0818-01 is obsolete and RoHS non-compliant.

Q: What is the difference between the D0818-42 and 122-87-318-41-001101?

A: Both parts are electrically equivalent 18-position DIP sockets with identical mating pitch, row spacing, and contact materials. The key differences are: (1) mating contact finish thickness—D0818-42 specifies 10.0µin (0.25µm) while 122-87-318-41-001101 specifies flash; (2) termination post length—D0818-42 is 0.510" (12.95mm) while 122-87-318-41-001101 is 0.370" (9.40mm). Post length differences may affect PCB hole depth requirements.

Q: Are there any compliance differences between these substitutes?

A: Yes. The D0818-01 is RoHS non-compliant. Both D0818-42 and 122-87-318-41-001101 are ROHS3 compliant. All three parts are REACH unaffected and carry UL94 V-0 flammability ratings.

Q: Does the flash gold finish on the 122-87-318-41-001101 affect electrical performance?

A: Both the 10.0µin (0.25µm) gold finish and flash finish provide the same contact resistance specification of 10mOhm. Flash finish is a thinner application of gold plating. Selection between these finishes depends on specific application requirements and PCB design specifications.

Q: What is the significance of the different termination post lengths?

A: The D0818-42 has 0.510" (12.95mm) post length while the 122-87-318-41-001101 has 0.370" (9.40mm) post length. This difference affects wire wrap depth requirements and PCB hole specifications. Verify your PCB design accommodates the selected post length before implementation.

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