Amphenol ICC 55508-142 Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 55508-142 is a 42-position receptacle connector in the Minitek® 2.00mm series, designed for board-to-board surface mount applications. This connector features 0.079" (2.00mm) pitch, gold-plated mating contacts, and operates across -55°C to 125°C. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts maintain core electrical and mechanical compatibility while offering improved availability and compliance status.

Key Parameters

Parameter	55508-142
Connector Type	Receptacle
Number of Positions	42
Pitch - Mating	0.079" (2.00mm)
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Surface Mount
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Operating Temperature	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
Current Rating	2A
Voltage Rating	200V
Insulation Material	Plastic
Contact Material	Phosphor Bronze
RoHS Status	Non-compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following core parameters:

Connector Type & Style: Receptacle, board-to-board configuration
Position Count & Pitch: 42 positions at 0.079" (2.00mm) mating pitch
Row Configuration: 2 rows with 0.079" (2.00mm) row spacing
Mounting & Termination: Surface mount with solder termination
Fastening: Push-pull mechanism
Contact Finish - Mating: Gold plating
Operating Temperature Range: -55°C to 125°C minimum
Flammability Rating: UL94 V-0
Contact Material: Phosphor bronze

Substitute parts are grouped into two categories:

Category 1: Direct Amphenol ICC Substitutes

55508-142LF: Active product with identical electrical and mechanical specifications. Differs only in post contact finish (tin vs. tin-lead) and RoHS compliance status.

Category 2: Cross-Manufacturer Samtec CLT Series Substitutes

CLT-121-02-F-D, CLT-121-02-F-D-A, CLT-121-02-F-D-A-K-TR, CLT-121-02-F-D-BE, CLT-121-02-F-D-BE-A, CLT-121-02-F-D-BE-A-P-TR, CLT-121-02-FM-D, CLT-121-02-FM-D-BE-A-K, CLT-121-02-G-D: All maintain core position count, pitch, row configuration, and operating temperature. Variations include connector entry style (standard vs. bottom entry), contact finish thickness, insulation material (LCP vs. plastic), and current rating per contact (4.1A vs. 2A).

Parameter Comparison

Parameter	55508-142	55508-142LF	CLT-121-02-F-D	CLT-121-02-F-D-A	CLT-121-02-F-D-BE	CLT-121-02-G-D
Manufacturer	Amphenol ICC	Amphenol ICC	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.
Number of Positions	42	42	42	42	42	42
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Number of Rows	2	2	2	2	2	2
Row Spacing - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Termination	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold
Contact Finish Thickness - Mating	30.0µin (0.76µm)	30.0µin (0.76µm)	3.00µin (0.076µm)	3.00µin (0.076µm)	3.00µin (0.076µm)	10.0µin (0.25µm)
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Current Rating	2A	2A	4.1A per Contact	4.1A per Contact	4.1A per Contact	4.1A per Contact
Insulation Material	Plastic	Plastic	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
RoHS Status	Non-compliant	Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For Direct Replacement (Amphenol ICC Series)

The 55508-142LF is the primary direct substitute for the obsolete 55508-142. Both parts share identical electrical and mechanical specifications, including position count, pitch, row spacing, operating temperature range, and flammability rating. The 55508-142LF is currently active and RoHS compliant, addressing supply chain continuity and regulatory requirements. The only functional difference is the post contact finish (tin vs. tin-lead), which does not affect mating performance.

For Cross-Manufacturer Substitution (Samtec CLT Series)

The Samtec CLT-121 series provides functional equivalence with several design considerations:

CLT-121-02-F-D: Standard entry configuration. Suitable for applications where connector orientation is not constrained. Offers higher current rating (4.1A per contact) and LCP insulation material.
CLT-121-02-F-D-A: Includes board guide feature for improved alignment during assembly. Recommended for applications requiring enhanced mechanical stability.
CLT-121-02-F-D-BE and CLT-121-02-F-D-BE-A: Bottom entry configuration. Required for applications where the connector must be accessed from the board underside. The -A variant includes board guide.
CLT-121-02-F-D-A-K-TR and CLT-121-02-FM-D-BE-A-K: Include pick-and-place features for automated assembly. Recommended for high-volume manufacturing environments.
CLT-121-02-G-D: Gold post finish variant. Suitable for applications requiring enhanced corrosion resistance or specific contact finish specifications.

All Samtec CLT substitutes are active products with ROHS3 compliance and meet the -55°C to 125°C operating temperature requirement. The higher per-contact current rating (4.1A vs. 2A) provides design margin for applications approaching the original 2A system limit.

Frequently Asked Questions (FAQ)

Q: Can 55508-142LF be used as a direct drop-in replacement for 55508-142?

A: Yes. The 55508-142LF maintains identical position count (42), pitch (0.079"), row configuration (2 rows), mounting type (surface mount), termination (solder), fastening (push-pull), mating contact finish (gold), operating temperature range (-55°C to 125°C), and flammability rating (UL94 V-0). The post contact finish differs (tin vs. tin-lead), but this does not affect mating performance or electrical function.

Q: What are the key differences between Amphenol ICC 55508-142LF and Samtec CLT-121 series substitutes?

A: Core compatibility parameters are identical: 42 positions, 0.079" pitch, 2-row configuration, surface mount, solder termination, push-pull fastening, gold mating finish, and -55°C to 125°C operating range. Differences include insulation material (plastic vs. LCP), contact finish thickness (30.0µin vs. 3.00µin or 10.0µin), current rating per contact (2A vs. 4.1A), and connector entry style (standard vs. bottom entry options). These differences do not affect mechanical or electrical compatibility for standard applications.

Q: Which Samtec CLT variant should be selected for bottom-entry applications?

A: CLT-121-02-F-D-BE or CLT-121-02-F-D-BE-A. The -BE designation indicates bottom entry configuration. The -A variant includes a board guide feature for improved alignment. For automated assembly, CLT-121-02-F-D-BE-A-P-TR or CLT-121-02-FM-D-BE-A-K include pick-and-place features.

Q: Are all substitute parts RoHS compliant?

A: The 55508-142LF is RoHS compliant. All Samtec CLT-121 variants listed are ROHS3 compliant. The original 55508-142 is RoHS non-compliant. For applications requiring RoHS compliance, use 55508-142LF or any CLT-121 variant.

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

A: Contact finish thickness affects durability and wear resistance. The original 55508-142 specifies 30.0µin (0.76µm) mating contact finish. Most Samtec CLT variants specify 3.00µin (0.076µm), and CLT-121-02-G-D specifies 10.0µin (0.25µm). All thicknesses meet UL94 V-0 flammability requirements and maintain electrical performance across the operating temperature range. Thinner finishes are typical for modern LCP-based connectors and do not indicate reduced reliability.

Q: Can CLT-121-02-G-D be used where gold post finish is required?

A: Yes. CLT-121-02-G-D is the only substitute variant with gold post finish (3.00µin). All other CLT variants have tin post finish. If post finish specification is critical, CLT-121-02-G-D is the appropriate selection.

Q: What is the impact of higher current rating in Samtec CLT variants?

A: Samtec CLT-121 series is rated for 4.1A per contact, compared to 2A for the original 55508-142. This higher rating provides design margin and does not create compatibility issues. Applications designed for 2A operation remain fully compatible with CLT-121 substitutes.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message