L77DFD50SAM4

Part Overview

The L77DFD50SAM4 is a 50-position D-Sub receptacle connector manufactured by Amphenol ICC, featuring right-angle solder termination and panel mount through-hole installation. This connector is classified as an active product with full RoHS compliance. Alternative equivalent parts are identified to support supply chain flexibility, inventory optimization, and sourcing continuity when the primary part becomes unavailable.

Substiute Parts

L77DFD50SAM4

Amphenol ICC (Commercial Products)In Stock: 1163L77DFD50SAM4 Datasheet

Current PartRFQ

174-E50-213R001

NorComp Inc.In Stock: 1689174-E50-213R001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for D-Sub connectors is determined by matching critical electrical and mechanical parameters. The following parameters must align for functional equivalence:

Matched Parameters (Primary Substitution Criteria):

• Connector type: Receptacle, Female Sockets
• Number of positions: 50
• Number of rows: 3
• Shell size: 5 (DD, D)
• Mounting type: Panel Mount, Through Hole, Right Angle
• Termination: Solder
• Connector style: D-Sub
• Contact type: Signal
• Material flammability rating: UL94 V-0
• ECCN and HTSUS codes

Secondary Parameters Influencing Substitution:

• Current rating
• Voltage rating
• Operating temperature range
• Contact finish material and thickness
• Shell material finish
• Dielectric material composition
• Backset spacing

The substitute part 174-E50-213R001 maintains equivalence across primary parameters but exhibits variations in secondary parameters. These variations must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (L77DFD50SAM4): This Amphenol ICC connector is the baseline specification and should be selected for new designs when sourcing availability permits. It carries RoHS compliance certification and active product status, with comprehensive electrical and thermal specifications documented.

Substitute Part (174-E50-213R001): The NorComp Inc. equivalent maintains functional interchangeability across core mechanical and electrical architecture. This substitute is suitable when the primary part is unavailable. However, the following application-dependent considerations apply:

• Current rating differential (5A vs. 7.5A) requires verification against circuit current demands
• Operating temperature range reduction (-50°C to 100°C vs. -55°C to 155°C) must align with environmental specifications
• Contact finish thickness specification (Flash vs. 20.0µin) may affect long-term reliability in high-cycle insertion environments
• Backset spacing variation (0.370" vs. 0.319") necessitates PCB footprint validation
• Dielectric material change (Polyamide PA6T vs. Thermoplastic Glass-Filled) should be confirmed for mechanical stress tolerance

Both parts carry UL94 V-0 flammability certification and support equivalent packaging in tray format.

Frequently Asked Questions (FAQ)

Q: What determines whether 174-E50-213R001 can substitute for L77DFD50SAM4?

A: Both connectors match across 50-position D-Sub receptacle configuration, female socket contact type, shell size 5 (DD, D), panel mount through-hole right-angle mounting, and solder termination. Substitution feasibility depends on application tolerance to the documented parameter variations, particularly current rating, operating temperature range, and backset spacing.

Q: Are there physical compatibility concerns with the backset spacing difference?

A: Backset spacing of 0.319" (8.10mm) on the primary part differs from the substitute's 0.370" (9.40mm). This measurement affects the connector's protrusion from the panel and must be validated against mechanical clearance requirements and mating plug geometry. PCB footprint confirmation is required prior to substitution.

Q: Can the 174-E50-213R001 operate in the full -55°C to 155°C temperature range?

A: No. The NorComp substitute is rated for -50°C to 100°C operation. Applications requiring full -55°C to 155°C performance must retain the primary part. Thermal stress testing is necessary if temperature boundary conditions approach the substitute's limits.

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

A: The primary part specifies 20.0µin (0.51µm) gold plating, while the substitute provides a flash coating. Flash plating offers minimal corrosion protection and shorter insertion-cycle durability. Applications involving frequent mating/unmating cycles should factor this into connector lifecycle assessment.

Q: Are both parts RoHS compliant?

A: Both parts meet RoHS regulations. The primary part carries RoHS Compliant certification, while the substitute meets ROHS3 Compliant and REACH Unaffected designations, indicating updated compliance framework alignment.

Q: What is the current rating implication for circuit design?

A: The primary part is rated 7.5A while the substitute is rated 5A. If circuit current per pin exceeds 5A, the substitute cannot be used without thermal and reliability risk. Circuit designs operating at 5A or below present no additional concern.