Amphenol ICC L77HDD78SVF: Equivalent & Substitute Parts

Part Overview

The Amphenol ICC L77HDD78SVF is a 78-position D-Sub High Density receptacle connector with female sockets, designed for free-hanging in-line mounting applications. This connector features solder cup termination, gold-plated contacts, and operates across a temperature range of -55°C to 155°C. The part maintains active product status with RoHS compliance and is currently in stock with 1,102 units available. Substitute parts become necessary when application requirements diverge from the original specification regarding mounting method, current rating, or thermal operating range.

Substiute Parts

L77HDD78SVF

Amphenol ICC (Commercial Products)In Stock: 1170L77HDD78SVF Datasheet

Current PartRFQ

180-078-203L001

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

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180-078-203L011

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

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180-078-203L021

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

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Key Parameters

Substitute Part Grouping Explanation

Three substitute parts are identified within the NorComp Inc. 180 series. The substitution logic is based on the following critical parameters that define equivalent functionality:

Equivalent Parameters (maintained across all substitutes):

• D-Sub High Density connector configuration (78 positions, 4 rows, Shell Size 5)
• Female sockets receptacle type
• Solder cup termination method
• Gold-plated contact finish (Flash thickness)
• UL94 V-0 flammability rating
• 78-position capacity and electrical connectivity topology

Divergent Parameters (distinguishing substitutes from primary part):

• Mounting type: All substitutes use panel mount rather than free-hanging in-line
• Current rating: Substitutes rated at 5A versus 3A primary part
• Operating temperature: Substitutes operate -50°C to 100°C versus -55°C to 155°C primary range
• Shell finish: Nickel-plated versus tin-plated
• Contact material: Brass versus phosphor bronze
• Dielectric material: Polybutylene Terephthalate (PBT) versus thermoplastic glass-filled

The three NorComp substitute parts differ only in flange feature configuration (housing/shell unthreaded versus cable side 4-40 threaded), with no electrical impact on signal integrity or position count.

Parameter Comparison

Engineering Selection Recommendations

L77HDD78SVF Selection Criteria:

• Primary applications requiring free-hanging in-line connector mounting
• Temperature environments spanning -55°C to 155°C operating range
• Designs with maximum current specifications up to 3A per contact
• Systems requiring 250V voltage rating specification

NorComp 180-078-203L001 Selection Criteria:

• Panel-mount connector applications
• Operating temperature range limited to -50°C to 100°C
• Designs without external flange mechanical requirements
• Thermal operating band compatible with standard industrial environments (ROHS3 compliant)

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

• Panel-mount D-Sub HD applications requiring 5A current per contact
• Cable-side mechanical interface (4-40 threaded flange) required
• Operating temperature range -50°C to 100°C
• ROHS3 and REACH unaffected compliance status
• Shielded connector configurations for noise-sensitive signal paths

All substitute parts maintain UL94 V-0 flammability certification and solder cup termination compatibility.

Frequently Asked Questions (FAQ)

Q: Can the NorComp 180-078-203L011 or 180-078-203L021 directly replace the Amphenol ICC L77HDD78SVF?

A: Direct replacement is restricted to applications where both mounting method and operating temperature ranges are compatible. The L77HDD78SVF requires free-hanging in-line mounting, while all NorComp substitutes require panel mounting. The L77HDD78SVF operates to -55°C, exceeding NorComp specifications at -50°C minimum. Current rating differs (3A vs. 5A). These differences preclude direct replacement without circuit board redesign.

Q: What is the significance of the 4-40 flange feature difference?

A: The L77HDD78SVF features a mating-side female screwlock (4-40), whereas 180-078-203L011 and 180-078-203L021 feature cable-side 4-40 threading. The 180-078-203L001 has no threaded flange. These variations determine mechanical mating interface configuration and must align with mating connector specifications.

Q: Does contact material difference (phosphor bronze vs. brass) affect electrical performance?

A: Both phosphor bronze and brass are acceptable contact materials for D-Sub connectors with gold plating. The choice reflects manufacturing and cost optimization within equivalent electrical performance boundaries. Gold flash plating on both materials provides corrosion resistance and low contact resistance.

Q: Which substitute part matches the thermal requirements most closely?

A: None of the NorComp substitutes match the extended -55°C to 155°C range of the L77HDD78SVF. All NorComp parts operate within -50°C to 100°C. Applications requiring temperatures below -50°C or above 100°C cannot use NorComp substitutes.

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

A: Yes, for electrical functionality, these two parts are interchangeable. Both feature 78-position D-Sub HD configuration, 5A current rating, identical dielectric and contact materials, and matching flange type (cable-side 4-40). Mechanical mounting context determines selection between them.