Amphenol ICC 55508-350 Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 55508-350 is a 50-position receptacle connector with 0.079" (2.00mm) pitch, designed for surface mount board-to-board applications. This part operates across the -55°C to 125°C temperature range with a 2A current rating and 200V voltage rating. The connector features gold-plated mating contacts and tin-lead post finish, housed in black plastic insulation with UL94 V-0 flammability rating.

The 55508-350 is classified as obsolete. Direct substitution requires identifying active production alternatives that maintain electrical and mechanical compatibility while meeting current regulatory requirements, particularly RoHS compliance.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Number of Positions	50
Pitch - Mating	0.079" (2.00mm)
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Surface Mount
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Current Rating	2A
Voltage Rating	200V
Operating Temperature	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution of the 55508-350 is determined by strict equivalence in the following parameters:

50-position configuration with 2-row layout
0.079" (2.00mm) mating pitch and row spacing
Surface mount solder termination
Push-pull fastening mechanism
Gold mating contact finish
-55°C to 125°C operating temperature range
UL94 V-0 flammability rating
Board-to-board connector style

Substitute parts are grouped into two categories:

Category 1: Direct Amphenol ICC Substitutes The 55508-350LF is the direct RoHS-compliant successor from Amphenol ICC, maintaining identical mechanical and electrical specifications with updated post finish (tin instead of tin-lead) and active product status.

Category 2: Samtec CLT and TLE Series Alternatives Samtec connectors in the CLT and TLE series provide functional equivalence with variations in connector entry style (bottom entry vs. standard), insulation material (liquid crystal polymer vs. plastic), and contact current ratings (4.1A per contact vs. 2A). These alternatives maintain the core 50-position, 2.00mm pitch, surface mount, push-pull architecture.

Parameter Comparison

Parameter	55508-350	55508-350LF	CLT-125-02-F-D-BE-A-P	CLT-125-02-F-D-BE-P	CLT-125-02-F-D-K-TR	CLT-125-02-L-D-A-P	CLT-125-02-S-D-BE-A-K-TR	CLT-125-02-S-D-BE-A-P-TR	CLT-125-02-S-D-BE-K	TLE-125-01-G-DV	TLE-125-01-G-DV-A
Manufacturer	Amphenol ICC	Amphenol ICC	Samtec	Samtec	Samtec	Samtec	Samtec	Samtec	Samtec	Samtec	Samtec
Number of Positions	50	50	50	50	50	50	50	50	50	50	50
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)	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	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)	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	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Contact Finish Thickness - Mating	15.0µin (0.38µm)	15.0µin (0.38µm)	3.00µin (0.076µm)	3.00µin (0.076µm)	3.00µin (0.076µm)	10.0µin (0.25µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	10.0µin (0.25µm)	10.0µin (0.25µm)
Insulation Color	Black	Black	Black	Black	Black	Black	Black	Black	Black	Black	Black
Insulation Height	0.091" (2.30mm)	0.091" (2.30mm)	0.083" (2.10mm)	0.083" (2.10mm)	0.083" (2.10mm)	0.083" (2.10mm)	0.083" (2.10mm)	0.083" (2.10mm)	0.083" (2.10mm)	0.177" (4.50mm)	0.177" (4.50mm)
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	-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	UL94 V-0	UL94 V-0	UL94 V-0	—	—
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Current Rating	2A	2A	4.1A per Contact	4.1A per Contact	4.1A per Contact	4.1A per Contact	4.1A per Contact	4.1A per Contact	4.1A per Contact	3.2A per Contact	3.2A per Contact
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Connector Type	Receptacle	Receptacle	Receptacle, Bottom Entry	Receptacle, Bottom Entry	Receptacle	Receptacle	Receptacle, Bottom Entry	Receptacle, Bottom Entry	Receptacle, Bottom Entry	Receptacle, Pass Through	Receptacle, Pass Through
Insulation Material	Plastic	Plastic	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Packaging	—	Tube	Tube	Tube	Tape & Reel (TR)	Tube	Tape & Reel (TR)	Tape & Reel (TR)	—	Tube	Tube

Engineering Selection Recommendations

Primary Recommendation: 55508-350LF

The Amphenol ICC 55508-350LF is the direct successor to the 55508-350. It maintains identical mechanical and electrical specifications while achieving RoHS compliance through post finish modification (tin instead of tin-lead). The part is in active production status with 1102 units in stock. This option requires no design changes and preserves all original connector characteristics.

Secondary Recommendations: Samtec CLT Series

The Samtec CLT-125 series provides functional equivalence with the following considerations:

CLT-125-02-F-D-BE-A-P and CLT-125-02-F-D-BE-P are bottom-entry variants with board guide features. Both are ROHS3 compliant and in active production. The bottom-entry configuration may require PCB layout adjustment.

CLT-125-02-F-D-K-TR is supplied in tape and reel packaging, suitable for automated assembly. Identical electrical and mechanical specifications to the bottom-entry variants.

CLT-125-02-L-D-A-P includes board guide and pick-and-place features with 10.0µin gold plating thickness, positioned between the thinner CLT variants and the original 55508-350.

CLT-125-02-S-D-BE-A-K-TR and CLT-125-02-S-D-BE-A-P-TR feature 30.0µin gold plating thickness, matching the original part's contact finish thickness more closely. Both include board guide and pick-and-place features. Available in tape and reel packaging.

CLT-125-02-S-D-BE-K is the tube-packaged variant of the 30.0µin gold plating specification.

Tertiary Recommendation: Samtec TLE Series

The Samtec TLE-125-01-G-DV and TLE-125-01-G-DV-A are pass-through receptacles with increased insulation height (0.177" vs. 0.091"). These connectors support board-to-board or cable applications. Current rating is 3.2A per contact. The TLE-125-01-G-DV-A includes board guide features. Both are ROHS3 compliant and in active production. The pass-through configuration and increased height require PCB design verification.

Frequently Asked Questions (FAQ)

Q: Can the 55508-350LF be used as a direct drop-in replacement for the 55508-350?

A: Yes. The 55508-350LF maintains identical mechanical and electrical specifications. The only difference is the post finish (tin vs. tin-lead) and RoHS compliance status. No design changes are required.

Q: What is the primary difference between Amphenol ICC and Samtec alternatives?

A: The Amphenol ICC 55508-350LF is the direct successor from the original manufacturer. Samtec alternatives provide functional equivalence but may differ in connector entry style (bottom entry vs. standard), insulation material (LCP vs. plastic), and contact current ratings. Samtec options offer higher current capacity per contact (3.2A to 4.1A vs. 2A).

Q: Are Samtec CLT bottom-entry connectors mechanically compatible with standard PCB layouts designed for the 55508-350?

A: Bottom-entry connectors require different PCB routing and component placement. Standard layouts designed for top-entry connectors like the 55508-350 must be modified to accommodate bottom-entry variants. Mechanical compatibility exists, but PCB design changes are necessary.

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

A: Contact finish thickness affects durability and wear resistance. The original 55508-350 has 15.0µin gold plating. Samtec CLT variants range from 3.00µin to 30.0µin. The CLT-125-02-S series (30.0µin) provides the closest match to the original specification. Thinner finishes (3.00µin) are suitable for lower-cycle applications.

Q: Which substitute part is best for automated assembly?

A: Samtec CLT-125-02-F-D-K-TR and CLT-125-02-S-D-BE-A-K-TR are supplied in tape and reel packaging, optimized for pick-and-place equipment. Both include pick-and-place features and are ROHS3 compliant.

Q: Can the TLE pass-through connectors be used in place of standard receptacles?

A: The TLE series provides pass-through functionality, allowing signal routing through the connector. This is a different connector architecture than the standard receptacle. Use TLE variants only if pass-through capability is required or if the increased insulation height (0.177") is compatible with the application.

Q: What is the inventory status of these substitute parts?

A: The 55508-350LF has 1102 units in stock. Samtec CLT variants range from 728 to 1096 units. Samtec TLE variants have 706 to 1442 units available. All substitute parts are in active production.

Q: Are all substitute parts RoHS compliant?

A: The 55508-350LF is RoHS compliant. All Samtec CLT and TLE variants are ROHS3 compliant. The original 55508-350 is RoHS non-compliant.

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