50003-1264E Equivalent & Substitute Parts

Part Overview

The 50003-1264E is a 264-position high-density backplane connector receptacle manufactured by Amphenol ICC (FCI) in the HPC™ series. This component is a female socket receptacle designed for through-hole, right-angle mounting on printed circuit boards. The part is currently classified as obsolete, which necessitates identification of active equivalent alternatives to maintain supply chain continuity for legacy system support and new production requirements.

Key Parameters

Parameter	Value
Connector Type	Receptacle, Female Sockets
Number of Positions	264
Connector Style	High Density (HDC, HDI, HPC)
Pitch	0.100" (2.54mm)
Configuration	4 Rows × 66 Columns
Mounting Type	Through Hole, Right Angle
Termination	Solder
Contact Finish	Gold, 30.0µin (0.76µm)
Features	Mating Guide
Series	HPC™
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 50003-1264E is determined by strict equivalence across the following critical parameters:

Connector type and gender (Receptacle, Female Sockets)
Position count (264 positions)
Connector style classification (High Density)
Pitch specification (0.100" / 2.54mm)
Physical configuration (4 rows, 66 columns)
Mounting orientation and method (Through Hole, Right Angle)
Termination method (Solder)
Contact material and finish (Gold plating)
Series designation (HPC™)

The 50003-1264ELF meets all these criteria and is manufactured by the same supplier using identical electrical and mechanical specifications. The primary distinction is product status: the original part is obsolete while the substitute is active in production.

Parameter Comparison

Parameter	50003-1264E	50003-1264ELF	Match
Manufacturer	Amphenol ICC (FCI)	Amphenol ICC (FCI)	✓
Series	HPC™	HPC™	✓
Connector Type	Receptacle, Female Sockets	Receptacle, Female Sockets	✓
Number of Positions	264	264	✓
Connector Style	High Density (HDC, HDI, HPC)	High Density (HDC, HDI, HPC)	✓
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	✓
Rows × Columns	4 × 66	4 × 66	✓
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	✓
Termination	Solder	Solder	✓
Contact Finish	Gold, 30.0µin (0.76µm)	Gold, 30.0µin (0.76µm)	✓
Features	Mating Guide	Mating Guide	✓
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	✓
Product Status	Obsolete	Active	—
RoHS Status	RoHS non-compliant	RoHS Compliant	—

Engineering Selection Recommendations

The 50003-1264ELF is the direct functional equivalent of the 50003-1264E. Both parts share identical electrical and mechanical specifications within the HPC™ series backplane connector family. Selection between these parts should be based on the following criteria:

For new designs and active production: The 50003-1264ELF is the appropriate choice. This part carries active product status and meets RoHS compliance requirements, making it suitable for current manufacturing standards and regulatory requirements.

For legacy system support: The 50003-1264E remains available in inventory (1086 units) for applications where existing designs are locked to this specific part number. However, the 50003-1264ELF can be substituted in legacy applications without electrical or mechanical redesign, provided that RoHS compliance does not conflict with existing system certifications.

Compliance consideration: The transition from RoHS non-compliant to RoHS compliant status represents a material composition change. Applications subject to RoHS regulations should transition to the 50003-1264ELF. Applications exempt from RoHS requirements may continue using either part based on inventory and supply availability.

Frequently Asked Questions (FAQ)

Q: Can the 50003-1264ELF be used as a direct replacement for the 50003-1264E in existing designs?

A: Yes. Both parts are identical in electrical and mechanical specifications. The 50003-1264ELF can be substituted without circuit board redesign or connector interface modification. The primary difference is RoHS compliance status and product lifecycle stage.

Q: What does the "ELF" suffix in the part number 50003-1264ELF indicate?

A: The "ELF" suffix designates RoHS compliance and lead-free material composition. This is a material and regulatory designation, not a functional or dimensional change.

Q: Are there any pin compatibility or mating issues between these two parts?

A: No. Both parts maintain identical pin counts (264 positions), pitch (0.100"), configuration (4 rows × 66 columns), and contact geometry. Mating connectors designed for either part number will function identically with the other.

Q: Why is the 50003-1264E classified as obsolete?

A: The obsolete status reflects the manufacturer's transition to RoHS-compliant product lines. The 50003-1264ELF represents the active continuation of this connector family and is the recommended part for new applications.

Q: What is the difference in current inventory between these parts?

A: The 50003-1264E has 1086 units in stock, while the 50003-1264ELF has 784 units available. Inventory levels should be verified with the supplier for current availability.

Q: Are both parts classified under the same ECCN and HTSUS codes?

A: Yes. Both parts share identical ECCN (EAR99) and HTSUS (8536.69.4040) classifications, indicating no change in export control or tariff treatment.

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