Amphenol ICC 55003-101003 High Speed Backplane Connector Header – Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 55003-101003 is a 36-position high-speed backplane connector header designed for through-hole PCB mounting. This component features a Metral® 4000 series construction with press-fit termination, gold-plated contacts, and shielded design suitable for signal and ground distribution in high-speed applications. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.

Substiute Parts

55003-101003

Amphenol ICC (FCI)In Stock: 75855003-101003 Datasheet

Current PartRFQ

55003-101003LF

Amphenol ICC (FCI)In Stock: 171555003-101003LF Datasheet

DirectRFQ

5223011-1

TE Connectivity AMP ConnectorsIn Stock: 11425223011-1 Datasheet

MFR RecommendedRFQ

MP2-H030-51P1-S-KR

3MIn Stock: 821MP2-H030-51P1-S-KR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 55003-101003 is determined by the following critical parameters:

• Connector pitch (0.079" / 2.00mm): All substitute parts must maintain identical pitch for PCB footprint compatibility
• Mounting type (Through Hole): Substitutes must use through-hole termination to match existing PCB designs
• Termination method (Press-Fit): Press-fit contact technology must be preserved for mechanical and electrical integrity
• Contact finish (Gold): Gold plating ensures equivalent electrical performance and corrosion resistance
• Material flammability (UL94 V-0): Substitutes must meet or exceed this safety rating
• Operating temperature range: Substitutes must support the required thermal envelope or exceed it

The substitute parts listed below meet these core substitution criteria. Position count variations (36 vs. 30 positions) are acceptable where the connector style and electrical characteristics remain compatible with the application requirements.

Parameter Comparison

Engineering Selection Recommendations

55003-101003LF (Direct Amphenol ICC Equivalent)

This part is the direct successor to the 55003-101003, maintaining identical electrical and mechanical specifications while achieving RoHS compliance. The LF suffix indicates lead-free termination processing. This is the preferred substitute for applications requiring exact form-fit-function replacement with modern compliance certifications. Active product status ensures long-term availability and supply chain stability.

5223011-1 (TE Connectivity Z-PACK Series)

This TE Connectivity part reduces position count from 36 to 30 while maintaining pitch, mounting type, and press-fit termination. It operates across an extended temperature range (-55°C ~ 125°C) and carries ROHS3 compliance. This substitute is suitable for applications where 30 positions satisfy functional requirements and where TE Connectivity connector ecosystem integration is preferred.

MP2-H030-51P1-S-KR (3M MetPak™ MP2 Series)

The 3M part provides 30 positions with identical pitch and press-fit termination. It features an elevated current rating (1.5A vs. 1A) and extended operating temperature range (-55°C ~ 125°C). The inclusion of board guide and mating guide features provides enhanced mechanical stability. This substitute is appropriate for applications requiring higher current capacity or where 3M connector integration is specified.

Frequently Asked Questions (FAQ)

Q: Can the 55003-101003LF be used as a direct replacement for the obsolete 55003-101003?

A: Yes. The 55003-101003LF maintains identical pitch (0.079" / 2.00mm), position count (36), connector type (header male pins), mounting type (through hole), and termination method (press-fit). The primary difference is RoHS compliance status. Electrical and mechanical performance are equivalent.

Q: What is the difference between the 36-position original part and the 30-position substitutes?

A: The 36-position 55003-101003 and 55003-101003LF provide six additional contact positions compared to the 5223011-1 and MP2-H030-51P1-S-KR. All parts maintain identical pitch and mounting characteristics. Position count selection depends on application requirements. If the design requires only 30 positions, the TE Connectivity or 3M alternatives are suitable.

Q: Are there compliance differences between these substitutes?

A: Yes. The original 55003-101003 is RoHS non-compliant. The 55003-101003LF is RoHS compliant. The 5223011-1 carries ROHS3 compliance. The MP2-H030-51P1-S-KR is RoHS compliant. For applications subject to RoHS regulations, the 55003-101003LF, 5223011-1, or MP2-H030-51P1-S-KR are required.

Q: What is the packaging format for these parts?

A: The 55003-101003 original part packaging is not specified. The 55003-101003LF, 5223011-1, and MP2-H030-51P1-S-KR are supplied in tube packaging, suitable for automated assembly processes.

Q: Do these parts support the same operating temperature range?

A: The 55003-101003 and 55003-101003LF operate from -55°C to 105°C. The 5223011-1 and MP2-H030-51P1-S-KR extend this range to -55°C to 125°C, providing additional thermal margin for demanding applications.

Q: What is the current rating difference between these connectors?

A: The 55003-101003, 55003-101003LF, and 5223011-1 are rated for 1A per contact. The MP2-H030-51P1-S-KR is rated for 1.5A per contact, providing 50% additional current capacity for higher-power applications.