ICO-624-SST DIP Socket 24-Position Equivalent & Substitute Parts

Part Overview

The ICO-624-SST is a 24-position DIP socket manufactured by Samtec Inc., designed for through-hole mounting of dual inline package integrated circuits. This connector features gold-plated beryllium copper mating contacts with a 0.6" (15.24mm) row spacing and 0.100" (2.54mm) pitch. The part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching electrical and mechanical specifications: 24-position DIP configuration, 0.6" row spacing, 0.100" pitch, through-hole termination, and compatible operating temperature range of -55°C to 125°C. Substitutes from Mill-Max Manufacturing Corp. provide functionally equivalent alternatives with variations in contact finish materials and post plating specifications.

Key Parameters

Parameter	ICO-624-SST Specification
Number of Positions	24 (2 x 12)
Socket Type	DIP, 0.6" (15.24mm) Row Spacing
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	Solder
Operating Temperature	-55°C ~ 125°C
Current Rating	1 A
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts are grouped based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

24-position DIP configuration (2 x 12 layout)
0.6" (15.24mm) row spacing
0.100" (2.54mm) mating and post pitch
Through-hole solder termination
Operating temperature range -55°C to 125°C
Beryllium copper mating contact material

Secondary Variation Parameters:

Contact finish on mating surface (Gold or Tin)
Contact finish on post (Tin, Gold, or Tin-Lead)
Contact finish thickness specifications
Housing material (Polyester vs. PCT/Polyester)
Frame type (Open Frame vs. Closed Frame)
Current rating (1 A vs. 3 A)
RoHS compliance status

All listed substitutes maintain the core mechanical and electrical compatibility required for DIP socket applications. Variations in post plating and contact finish thickness do not affect functional interchangeability in standard through-hole PCB mounting applications.

Parameter Comparison

Part Number	Manufacturer	Mating Contact Finish	Post Contact Finish	Current Rating (A)	Frame Type	RoHS Status	Inventory (Pcs)
ICO-624-SST	Samtec Inc.	Gold (10.0µin)	Tin	1	Open Frame	ROHS3 Compliant	762
110-13-624-41-001000	Mill-Max	Gold (30.0µin)	Gold (10.0µin)	3	Open Frame	ROHS3 Compliant	1135
110-43-624-41-001000	Mill-Max	Gold (30.0µin)	Tin (200.0µin)	3	Open Frame	ROHS3 Compliant	2068
110-44-624-41-001000	Mill-Max	Tin (100.0µin)	Tin (200.0µin)	3	Open Frame	ROHS3 Compliant	2240
110-91-624-41-001000	Mill-Max	Gold (10.0µin)	Tin-Lead (200.0µin)	3	Open Frame	RoHS non-compliant	970
110-93-624-41-001000	Mill-Max	Gold (30.0µin)	Tin-Lead (200.0µin)	3	Open Frame	RoHS non-compliant	1666
110-93-624-41-801000	Mill-Max	Gold (30.0µin)	Tin-Lead (200.0µin)	3	Open Frame + Decoupling Capacitor	RoHS non-compliant	886
110-99-624-41-001000	Mill-Max	Tin-Lead (200.0µin)	Tin-Lead (200.0µin)	3	Open Frame	RoHS non-compliant	1073
111-43-624-41-001000	Mill-Max	Gold (30.0µin)	Tin (200.0µin)	3	Open Frame	ROHS3 Compliant	1177
111-93-624-41-001000	Mill-Max	Gold (30.0µin)	Tin-Lead (200.0µin)	3	Open Frame	RoHS non-compliant	831
210-43-624-41-001000	Mill-Max	Gold (30.0µin)	Tin (200.0µin)	3	Closed Frame	ROHS3 Compliant	1220

Engineering Selection Recommendations

For RoHS3 Compliant Applications: Parts 110-13-624-41-001000, 110-43-624-41-001000, 110-44-624-41-001000, 111-43-624-41-001000, and 210-43-624-41-001000 meet ROHS3 compliance requirements equivalent to the ICO-624-SST. These parts are suitable for applications requiring regulatory compliance with RoHS Directive 3.

For Non-Compliant Legacy Applications: Parts 110-91-624-41-001000, 110-93-624-41-001000, 110-93-624-41-801000, 110-99-624-41-001000, and 111-93-624-41-001000 carry RoHS non-compliant status and are appropriate only for applications where RoHS compliance is not required.

For Closed Frame Requirements: Part 210-43-624-41-001000 provides a closed frame alternative while maintaining ROHS3 compliance and gold mating contact finish. This variant is suitable for applications requiring enhanced mechanical stability or shielding.

For Decoupling Capacitor Integration: Part 110-93-624-41-801000 includes integrated decoupling capacitor functionality in addition to standard socket features, suitable for applications requiring on-socket capacitive filtering.

Current Rating Consideration: The ICO-624-SST is rated for 1 A, while all Mill-Max substitutes are rated for 3 A. This higher rating in substitutes provides additional current capacity margin without affecting compatibility in standard DIP socket applications.

Frequently Asked Questions (FAQ)

Q: Are all listed parts mechanically interchangeable with the ICO-624-SST?

A: Yes. All substitute parts maintain identical 24-position DIP configuration, 0.6" row spacing, 0.100" pitch, and 0.125" termination post length. They are mechanically interchangeable in standard through-hole PCB layouts designed for 24-pin DIP sockets.

Q: What is the significance of contact finish variations (Gold, Tin, Tin-Lead)?

A: Contact finish affects corrosion resistance and solderability characteristics. Gold finishes provide superior corrosion resistance and are preferred for long-term reliability. Tin and Tin-Lead finishes are cost-effective alternatives suitable for standard applications. All finishes are compatible with standard solder reflow processes.

Q: Does the higher current rating (3 A) of Mill-Max parts affect compatibility?

A: No. Higher current rating indicates greater capacity and does not affect electrical or mechanical compatibility. Parts rated for 3 A are suitable for applications requiring 1 A or less.

Q: What is the difference between Open Frame and Closed Frame variants?

A: Open Frame sockets (ICO-624-SST and most Mill-Max parts) provide standard DIP socket functionality. Closed Frame variant (210-43-624-41-001000) offers enhanced mechanical stability and is suitable for applications requiring additional structural support or EMI shielding.

Q: Are RoHS non-compliant parts suitable for new designs?

A: RoHS non-compliant parts (110-91, 110-93, 110-99, 111-93 series) are restricted in applications subject to RoHS Directive 3 regulations. Use only in legacy applications or markets where RoHS compliance is not mandated.

Q: What is the purpose of the decoupling capacitor in part 110-93-624-41-801000?

A: The integrated decoupling capacitor provides on-socket noise filtering for IC power supply pins, reducing the need for separate discrete capacitors in some applications. This variant is functionally equivalent to standard sockets with the added benefit of integrated capacitive filtering.

Q: Can I substitute the ICO-624-SST with any of these parts without PCB redesign?

A: Yes. All listed parts are pin-compatible and footprint-compatible with standard 24-pin DIP socket PCB layouts. No PCB redesign is required for mechanical substitution. Verify RoHS compliance requirements for your application before selection.

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