L77HDDH78S D-Sub High Density 78 Position Receptacle Connector

Part Overview

The L77HDDH78S is a 78 Position D-Sub High Density Receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets with solder cup termination and is designed for free hanging, in-line mounting applications. The connector is actively produced and maintains 977 pieces in current inventory stock.

D-Sub High Density connectors are essential components in applications requiring compact, multi-position signal transmission with reliable mechanical and electrical performance. Alternative models become necessary when application requirements differ in mounting configuration, current capacity, or operating temperature range specifications.

Substiute Parts

L77HDDH78S

Amphenol ICC (Commercial Products)In Stock: 1007L77HDDH78S Datasheet

Current PartRFQ

180-078-203L001

NorComp Inc.In Stock: 1036180-078-203L001 Datasheet

SimilarRFQ

180-078-203L011

NorComp Inc.In Stock: 803180-078-203L011 Datasheet

SimilarRFQ

180-078-203L021

NorComp Inc.In Stock: 932180-078-203L021 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L77HDDH78S is determined by the following critical parameters that must remain constant across all alternatives:

Fixed Parameters (Non-Negotiable for Substitution):

• Connector Style: D-Sub, High Density
• Connector Type: Receptacle, Female Sockets
• Number of Positions: 78
• Number of Rows: 4
• Shell Size: 5 (DD, D) High Density
• Termination Method: Solder Cup
• Contact Type: Signal
• Contact Finish: Gold (Flash)
• Flammability Rating: UL94 V-0

Variable Parameters (Allowed to Differ):

• Manufacturer identity
• Mounting Type (Free Hanging vs. Panel Mount)
• Shell Material finish (Tin Plated vs. Nickel Plated)
• Contact Material (Phosphor Bronze vs. Brass)
• Current Rating (3A vs. 5A)
• Operating Temperature range
• Dielectric Material composition
• Compliance certifications

The three NorComp Inc. substitute parts (180-078-203L001, 180-078-203L011, 180-078-203L021) maintain all fixed parameters while offering alternative mounting configurations and enhanced current ratings suitable for different application requirements.

Parameter Comparison

Engineering Selection Recommendations

L77HDDH78S Selection Criteria:

• Applications requiring free hanging, in-line cable-side mounting configuration
• Systems operating across extended temperature range (-55°C to 155°C)
• Designs specifying 250V voltage rating
• Applications requiring phosphor bronze contact material
• Tin-plated shell finish specifications
• Current requirements up to 3A per contact

180-078-203L001 Selection Criteria:

• Panel mount applications with unthreaded housing flange
• Systems operating within -50°C to 100°C temperature range
• Applications where 3A current rating is sufficient
• Designs compatible with nickel-plated steel shell
• Brass contact material specifications
• Shielded connector requirement

180-078-203L011 and 180-078-203L021 Selection Criteria:

• Panel mount applications with cable-side (4-40) flange configuration
• Systems requiring enhanced current capacity (5A per contact)
• Operating temperature range -50°C to 100°C
• Applications compatible with nickel-plated steel shell
• Brass contact material specifications
• Shielded connector requirement

All substitute parts maintain active product status and current manufacturing availability. NorComp Inc. substitutes provide ROHS3 compliance and REACH unaffected status, while the Amphenol ICC original maintains RoHS compliance certification.

Frequently Asked Questions (FAQ)

Q: Can the L77HDDH78S be directly replaced with 180-078-203L001?

A: Direct replacement is possible only if the application permits transition from free hanging in-line mounting to panel mount configuration. The 180-078-203L001 features an unthreaded housing flange rather than cable-side mounting. Operating temperature range differs (-50°C to 100°C versus -55°C to 155°C). Current rating remains equivalent at 3A.

Q: What is the primary difference between 180-078-203L001 and 180-078-203L011?

A: The 180-078-203L001 features an unthreaded housing flange with 3A current rating. The 180-078-203L011 features a cable-side (4-40) flange with 5A current rating. Both are panel mount configurations with identical operating temperature range and dielectric material specifications.

Q: Are 180-078-203L011 and 180-078-203L021 interchangeable?

A: Yes. Both parts are functionally equivalent, featuring identical electrical specifications (5A current rating), mechanical configuration (cable-side 4-40 flange, panel mount), and environmental ratings. Inventory availability differs: 180-078-203L011 has 733 pieces in stock while 180-078-203L021 has 874 pieces in stock.

Q: What contact material differences exist between the original and substitutes?

A: The L77HDDH78S uses phosphor bronze contacts, while all NorComp substitutes use brass contacts. Both materials provide gold flash plating and maintain signal-grade contact performance. Contact material selection does not affect electrical compatibility in signal applications.

Q: Does the operating temperature range difference affect substitution suitability?

A: The L77HDDH78S operates from -55°C to 155°C, while NorComp substitutes operate from -50°C to 100°C. Substitution is appropriate only for applications operating within the -50°C to 100°C range. Applications requiring extended temperature operation below -50°C or above 100°C must retain the original L77HDDH78S.

Q: What is the significance of shell material finish differences?

A: The L77HDDH78S features tin-plated steel shell, while NorComp substitutes feature nickel-plated steel shell. Both finishes provide corrosion resistance and electrical conductivity. Selection depends on application environmental exposure and specific finish requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. The L77HDDH78S is RoHS Compliant. All three NorComp substitutes (180-078-203L001, 180-078-203L011, 180-078-203L021) are ROHS3 Compliant, meeting current regulatory requirements.

Q: What mounting configuration change occurs with NorComp substitutes?

A: The L77HDDH78S is free hanging in-line mount with cable-side (4-40) flange. The 180-078-203L001 is panel mount with unthreaded housing flange. The 180-078-203L011 and 180-078-203L021 are panel mount with cable-side (4-40) flange. Mounting configuration selection depends on application mechanical design requirements.