L77SDD50SVFC309 Equivalent & Substitute Parts

Part Overview

The L77SDD50SVFC309 is a 50-position D-Sub receptacle connector manufactured by Amphenol ICC, featuring female sockets with solder cup termination. This connector is designed for free-hanging, in-line applications and is classified as an active product with full RoHS compliance. The connector accommodates signal-level applications with a 3A current rating and 250V voltage rating across an operating temperature range of -55°C to 125°C.

Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when application-specific requirements necessitate different mounting configurations or electrical ratings.

Substiute Parts

L77SDD50SVFC309

Amphenol ICC (Commercial Products)In Stock: 1040L77SDD50SVFC309 Datasheet

Current PartRFQ

171-050-203L001

NorComp Inc.In Stock: 1382171-050-203L001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the L77SDD50SVFC309 is determined by strict alignment with the following core parameters:

Critical Matching Parameters:

• Connector style: D-Sub
• Connector type: Receptacle, Female Sockets
• Number of positions: 50
• Number of rows: 3
• Shell size and layout: 5 (DD, D)
• Termination type: Solder Cup
• Contact type: Signal
• Material flammability rating: UL94 V-0

Allowable Variations:

• Mounting type (free-hanging in-line versus panel mount)
• Shell material finish (tin plated versus nickel plated)
• Current rating (3A versus 5A, provided higher rating accommodates original specification)
• Operating temperature range (provided substitute range encompasses or overlaps original range)
• Dielectric material composition (thermoplastic glass-filled versus polybutylene terephthalate glass-filled)

The substitute part 171-050-203L001 meets all critical matching parameters and operates within acceptable electrical and thermal boundaries for D-Sub 50-position receptacle applications.

Parameter Comparison

Engineering Selection Recommendations

Both the L77SDD50SVFC309 and 171-050-203L001 are active products with current manufacturing status and full regulatory compliance. Selection between these parts is determined by application-specific mounting requirements and thermal operating conditions.

L77SDD50SVFC309 Selection Criteria:

• Applications requiring free-hanging, in-line connector orientation
• Systems operating at temperatures below -50°C or above 100°C, up to 125°C maximum
• Designs specifying 250V voltage rating
• Applications requiring tin-plated shell finish

171-050-203L001 Selection Criteria:

• Applications requiring panel-mount connector orientation
• Systems operating within -50°C to 100°C temperature range
• Applications benefiting from higher 5A current rating
• Designs compatible with nickel-plated shell finish
• Wire gauge compatibility with 20-28 AWG termination

Both parts maintain UL94 V-0 flammability rating and RoHS compliance. The substitute part provides equivalent electrical performance for signal-level applications within its specified operating envelope.

Frequently Asked Questions (FAQ)

Q: Can the 171-050-203L001 replace the L77SDD50SVFC309 in all applications?

A: Substitution is valid for applications where panel-mount orientation is acceptable and operating temperatures remain within -50°C to 100°C. Applications requiring free-hanging in-line mounting or temperatures exceeding 100°C require the original L77SDD50SVFC309.

Q: What is the significance of the different shell finishes (tin plated versus nickel plated)?

A: Shell finish affects corrosion resistance and environmental durability. Tin plating provides different corrosion characteristics than nickel plating. Selection depends on the specific environmental exposure conditions of the application.

Q: Does the higher current rating of the 171-050-203L001 (5A versus 3A) affect compatibility?

A: A higher current rating indicates the substitute part can safely handle the original part's 3A specification. This represents a compatible upgrade in electrical capacity and does not create compatibility issues.

Q: Are the dielectric materials functionally equivalent?

A: Both materials are glass-filled polymers meeting UL94 V-0 flammability requirements. Thermoplastic and polybutylene terephthalate (PBT) compositions provide equivalent performance for signal-level D-Sub applications within their respective operating temperature ranges.

Q: What mounting considerations apply when substituting between free-hanging and panel-mount versions?

A: Free-hanging connectors are designed for in-line cable termination without panel integration. Panel-mount connectors require mechanical integration into an enclosure or panel structure. Application PCB or cable assembly design must accommodate the selected mounting style.

Q: Is the flash gold contact finish on the substitute part equivalent to the 30.0µin thickness on the original?

A: Flash gold plating provides minimal gold thickness for contact surface protection. The original part specifies 30.0µin (0.76µm) thickness. Both finishes provide gold contact surfaces; the difference lies in plating thickness. Application requirements determine if this variation is acceptable.

Q: Do both parts support the same wire gauge range?

A: The original part does not specify wire gauge. The substitute part supports 20-28 AWG termination. Verify that solder cup termination dimensions accommodate the intended wire gauge for your application.

Q: Are both parts suitable for high-reliability applications?

A: Both parts are active products with RoHS compliance and UL94 V-0 flammability rating. Selection for high-reliability applications depends on meeting specific operating temperature, voltage, and current requirements within each part's rated specifications.