D50P91C4GI00 50-Position D-Sub Plug Connector - Equivalent & Substitute Parts

Part Overview

The D50P91C4GI00 is a 50-position D-Sub plug connector manufactured by Amphenol ICC (FCI) in the Delta D series. This through-hole mounted connector features male pins with press-fit termination and is designed for signal applications requiring robust mechanical and electrical performance. The part is currently classified as obsolete, making identification of active equivalent substitutes essential for ongoing procurement and system maintenance.

Substiute Parts

D50P91C4GI00

Amphenol ICC (FCI)In Stock: 1055D50P91C4GI00 Datasheet

Current PartRFQ

D50P91C4GI00LF

Amphenol ICC (FCI)In Stock: 1119D50P91C4GI00LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the D50P91C4GI00 is determined by strict equivalence across the following critical parameters:

• Connector type and gender (D-Sub plug with male pins)
• Position count and row configuration (50 positions, 3 rows)
• Shell size designation (Size 5, DD/D layout)
• Mounting methodology (through-hole)
• Termination technology (press-fit)
• Electrical ratings (5A per contact, 300V)
• Operating temperature envelope (-55°C to 125°C)
• Contact material and finish specifications (phosphor bronze with gold flash)
• Mechanical features (board lock, grounding indents, M3 screwlock)
• Dielectric material (PBT, UL94 V-0)

The D50P91C4GI00LF qualifies as a direct substitute based on full alignment with these parameters. Differences in shell plating finish (tin-nickel versus tin) and product status (active versus obsolete) do not affect functional interchangeability in the specified application envelope.

Parameter Comparison

Engineering Selection Recommendations

The D50P91C4GI00LF is the direct functional equivalent of the D50P91C4GI00. Selection of the substitute part is justified on the following grounds:

Product Status: The D50P91C4GI00 is classified as obsolete, while the D50P91C4GI00LF maintains active product status with confirmed inventory availability (1083 pcs), ensuring reliable procurement for new designs and system replacements.

Regulatory Compliance: The D50P91C4GI00LF is RoHS compliant, whereas the original part is RoHS non-compliant. For applications subject to RoHS directives or customer requirements, the substitute part satisfies regulatory obligations without functional compromise.

Shell Plating Specification: The substitute employs tin-nickel plating on the steel shell versus tin plating on the original. Both finishes provide equivalent corrosion resistance and electrical performance within the specified operating envelope and do not affect connector mating or signal integrity.

Electrical and Mechanical Equivalence: All critical electrical parameters (5A per contact, 300V), mechanical features (board lock, grounding indents, M3 screwlock), and environmental ratings (-55°C to 125°C, UL94 V-0) are identical, confirming full interchangeability in existing applications.

Frequently Asked Questions (FAQ)

Q: Can the D50P91C4GI00LF be used as a direct replacement for the D50P91C4GI00 in existing designs?

A: Yes. The D50P91C4GI00LF is functionally equivalent across all critical parameters including connector type, position count, shell size, termination method, electrical ratings, and mechanical features. The parts are mechanically and electrically interchangeable.

Q: What is the difference between the tin-plated and tin-nickel-plated shell finishes?

A: Both finishes provide corrosion protection and electrical performance suitable for the specified operating conditions. Tin-nickel plating offers enhanced durability in certain corrosive environments, but both meet the requirements of this connector category. Selection between them depends on specific environmental exposure requirements not altered by this substitution.

Q: Why is the D50P91C4GI00 listed as obsolete?

A: Product obsolescence reflects manufacturing discontinuation by Amphenol ICC (FCI). The D50P91C4GI00LF, sharing the same base product number (D50P91C4) and specifications, represents the active continuation of this connector line.

Q: Does the RoHS compliance difference affect compatibility?

A: No. RoHS compliance is a regulatory and material composition attribute, not a functional performance characteristic. The D50P91C4GI00LF meets RoHS requirements while maintaining identical electrical and mechanical performance. For applications requiring RoHS compliance, the substitute part is the appropriate selection.

Q: Are there packaging differences between these parts?

A: The D50P91C4GI00LF is supplied in tray packaging, while the original part packaging is not specified. Tray packaging is standard for high-pin-count connectors and does not affect connector performance or installation methodology.

Q: What is the current rating specification for these connectors?

A: Both parts are rated for 5A per contact. The D50P91C4GI00LF specification explicitly states "5A per Contact," while the original lists "5A." This represents the same electrical capacity and does not indicate a difference in performance.