L77DD50SA4 Equivalent & Substitute Parts

Part Overview

The L77DD50SA4 is a 50-position D-Sub receptacle connector manufactured by Amphenol ICC, featuring female sockets with right-angle solder termination. This connector is designed for applications requiring high-density signal transmission in industrial and commercial environments. The part maintains active product status with 914 units in current inventory.

Equivalent and substitute parts are identified to provide design flexibility, support supply chain continuity, and accommodate specific application requirements such as mounting configuration, temperature range, or contact finish specifications.

Substiute Parts

L77DD50SA4

Amphenol ICC (Commercial Products)In Stock: 940L77DD50SA4 Datasheet

Current PartRFQ

174-E50-213R001

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the L77DD50SA4 are identified based on strict equivalence of core electrical and mechanical parameters. The substitution logic is based on the following criteria:

Primary Equivalence Parameters:

• Connector type: Receptacle, female sockets
• Position count: 50 positions
• Row configuration: 3 rows
• Shell size: 5 (DD, D)
• Termination method: Solder
• Contact material: Brass with gold finish

Secondary Compatibility Parameters:

• Mounting configuration: Through hole, right angle
• Flange feature: Unthreaded housing/shell
• Contact form: Machined
• Material flammability: UL94 V-0

The substitute part 174-E50-213R001 (NorComp Inc.) meets all primary equivalence parameters and shares the same shell size, position count, and termination method. Differences in secondary parameters (shell finish, current rating, backset spacing, and operating temperature range) are documented to enable informed selection based on specific application constraints.

Parameter Comparison

Engineering Selection Recommendations

L77DD50SA4 (Amphenol ICC) Selection Criteria:

Use the L77DD50SA4 when applications require:

• Current capacity of 7.5A per contact
• Extended operating temperature range (-55°C to 125°C)
• Specified voltage rating of 300V
• Backset spacing of 0.319" (8.10mm)
• Tin-plated steel shell finish
• RoHS Compliant status

174-E50-213R001 (NorComp Inc.) Selection Criteria:

Use the 174-E50-213R001 when applications require:

• Panel mount capability in addition to through-hole mounting
• Current capacity of 5A per contact
• Operating temperature range of -50°C to 100°C
• Nickel-plated steel shell finish
• Backset spacing of 0.370" (9.40mm)
• ROHS3 Compliant status
• Polyamide (PA6T) dielectric material

Both parts share active product status, UL94 V-0 flammability rating, and machined brass contact construction with gold finish. Selection between these parts depends on specific application requirements for current rating, temperature range, and mounting configuration.

Frequently Asked Questions (FAQ)

Q: Can the 174-E50-213R001 directly replace the L77DD50SA4 in all applications?

A: Direct replacement is possible only when the application requirements align with the 174-E50-213R001 specifications. The substitute part has a lower current rating (5A vs. 7.5A), narrower operating temperature range (-50°C to 100°C vs. -55°C to 125°C), and different backset spacing (0.370" vs. 0.319"). Applications operating at the upper or lower temperature extremes, or requiring the full 7.5A current capacity, must use the L77DD50SA4.

Q: What is the significance of backset spacing difference?

A: Backset spacing of 0.319" (8.10mm) for the L77DD50SA4 versus 0.370" (9.40mm) for the 174-E50-213R001 affects the connector's depth when mounted. This difference impacts PCB layout and enclosure design. Verify backset spacing compatibility with your mechanical design before substitution.

Q: Are both parts RoHS compliant?

A: Yes. The L77DD50SA4 is RoHS Compliant, and the 174-E50-213R001 is ROHS3 Compliant. Both meet RoHS requirements for restricted substance elimination.

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

A: The L77DD50SA4 features a tin-plated steel shell, while the 174-E50-213R001 features a nickel-plated steel shell. Both finishes provide corrosion resistance. Shell finish selection depends on environmental exposure and specific application requirements for conductivity and durability.

Q: Can I use the 174-E50-213R001 in high-current applications?

A: The 174-E50-213R001 has a maximum current rating of 5A per contact, compared to 7.5A for the L77DD50SA4. Applications requiring current capacity above 5A per contact must use the L77DD50SA4.

Q: What dielectric materials are used in each connector?

A: The L77DD50SA4 uses thermoplastic with glass filler, while the 174-E50-213R001 uses polyamide (PA6T), specifically nylon 6T. Both materials meet UL94 V-0 flammability requirements. Material selection affects mechanical properties and temperature performance.