L177HDB44S D-Sub High Density 44 Position Receptacle Equivalent & Substitute Parts

Part Overview

The L177HDB44S is a 44 position D-Sub high density receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets with solder cup termination, designed for free hanging in-line mounting applications. The part is currently in active product status with 1022 units in stock.

Substitute parts become necessary when the L177HDB44S reaches end-of-life status, when inventory becomes unavailable, or when application requirements necessitate alternative mounting configurations. The NorComp Inc. 180 series connectors provide functionally equivalent alternatives with modified mounting and material specifications.

Substiute Parts

L177HDB44S

Amphenol ICC (Commercial Products)In Stock: 1052L177HDB44S Datasheet

Current PartRFQ

180-044-202L001

NorComp Inc.In Stock: 956180-044-202L001 Datasheet

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180-044-202L011

NorComp Inc.In Stock: 1022180-044-202L011 Datasheet

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180-044-203L001

NorComp Inc.In Stock: 1358180-044-203L001 Datasheet

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180-044-203L011

NorComp Inc.In Stock: 1194180-044-203L011 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the L177HDB44S is determined by the following critical parameters:

Core Compatibility Parameters:

• 44 position count (mandatory)
• 3 row configuration (mandatory)
• DB/B high density shell size (mandatory)
• Female socket receptacle type (mandatory)
• Solder cup termination (mandatory)
• Gold contact finish (mandatory)
• UL94 V-0 flammability rating (mandatory)

Variable Parameters Allowing Substitution:

• Mounting type: Free hanging in-line (L177HDB44S) versus panel mount (NorComp 180 series)
• Shell material finish: Tin plated (L177HDB44S) versus nickel plated (NorComp 180-044-203L series)
• Current rating: 3A (L177HDB44S) versus 5A (NorComp 180 series)
• Operating temperature range: -55°C ~ 125°C (L177HDB44S) versus -50°C ~ 100°C (NorComp 180 series)
• Flange feature: Housing/shell unthreaded (L177HDB44S) versus cable side 4-40 (NorComp 180-044-202L011 and 180-044-203L011)
• Dielectric material: Thermoplastic glass filled (L177HDB44S) versus polybutylene terephthalate (NorComp 180 series)
• Contact material: Phosphor bronze (L177HDB44S) versus brass (NorComp 180 series)

The NorComp 180 series substitutes are grouped into four variants based on shell finish (tin or nickel plated) and flange feature (unthreaded housing or cable side 4-40).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status):

The 180-044-203L001 and 180-044-203L011 connectors from NorComp Inc. are the preferred substitutes for the L177HDB44S. Both parts maintain active product status, ensuring long-term availability and supply chain stability. These connectors feature nickel-plated steel shells and are ROHS3 compliant.

Selection Criteria by Application:

180-044-203L001 is suitable for applications requiring panel mount configuration with unthreaded housing/shell flange. This variant provides 1273 units in current inventory.

180-044-203L011 is suitable for applications requiring panel mount configuration with cable side 4-40 flange. This variant provides 1177 units in current inventory.

Secondary Substitutes (Obsolete Status):

The 180-044-202L001 and 180-044-202L011 connectors are classified as obsolete products. While currently in inventory (909 and 999 units respectively), these parts should be considered only when active alternatives are unavailable. Both feature tin-plated steel shells.

Compliance Considerations:

All substitute parts maintain UL94 V-0 flammability rating and RoHS compliance. The NorComp 180 series parts are ROHS3 compliant, exceeding the RoHS compliance of the L177HDB44S.

Operating Parameter Deviations:

Substitution introduces the following parameter changes that must be evaluated against application requirements:

• Operating temperature range reduces from -55°C ~ 125°C to -50°C ~ 100°C
• Current rating increases from 3A to 5A
• Mounting type changes from free hanging in-line to panel mount
• Contact material changes from phosphor bronze to brass
• Dielectric material changes from thermoplastic glass filled to polybutylene terephthalate

These deviations are acceptable for most signal-level D-Sub applications but must be verified against specific circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the NorComp 180-044-203L001 directly replace the L177HDB44S in a free hanging in-line application?

A: No. The 180-044-203L001 is designed for panel mount configuration, while the L177HDB44S is designed for free hanging in-line mounting. The mechanical mounting interface differs between these two configurations. Application redesign or mechanical adapter solutions would be required.

Q: What is the difference between the 180-044-203L001 and 180-044-203L011?

A: Both connectors are identical except for the flange feature. The 180-044-203L001 has an unthreaded housing/shell flange, while the 180-044-203L011 has a cable side 4-40 flange. Selection depends on the specific panel mount and cable attachment requirements of the application.

Q: Why do the NorComp substitutes have a higher current rating (5A) than the L177HDB44S (3A)?

A: The current rating difference reflects design variations between manufacturers. The higher rating of the NorComp parts does not affect compatibility; applications designed for 3A operation remain fully compatible with 5A-rated connectors.

Q: Are the obsolete NorComp parts (180-044-202L001 and 180-044-202L011) acceptable for new designs?

A: No. Obsolete parts should not be specified for new designs. The active status parts (180-044-203L001 and 180-044-203L011) are the appropriate choices for new applications requiring NorComp substitutes.

Q: What is the significance of the contact finish thickness difference (16.0µin versus Flash)?

A: The L177HDB44S specifies 16.0µin (0.41µm) gold plating thickness, while NorComp substitutes specify flash plating. Flash plating provides minimal gold coverage for corrosion protection. This difference may affect long-term contact reliability in high-cycle mating applications; verify compatibility with application requirements.

Q: Do all substitute parts maintain the same solder cup termination?

A: Yes. All four NorComp substitute parts (180-044-202L001, 180-044-202L011, 180-044-203L001, and 180-044-203L011) feature solder cup termination identical to the L177HDB44S.

Q: What is the impact of the operating temperature range reduction from -55°C ~ 125°C to -50°C ~ 100°C?

A: Applications operating within the -50°C ~ 100°C range experience no impact. Applications requiring operation below -50°C or above 100°C are not compatible with NorComp substitutes and require alternative solutions.

Q: Are the NorComp 180 series connectors shielded?

A: Yes. All NorComp 180 series substitutes feature shielding. The L177HDB44S does not specify shielding. This additional shielding in substitutes provides enhanced electromagnetic interference protection and is generally beneficial for signal integrity.

Q: What packaging format is used for all these connectors?

A: All parts, including the L177HDB44S and all NorComp substitutes, are supplied in tray packaging.

Q: Can I use the 180-044-202L001 (tin plated) instead of the 180-044-203L001 (nickel plated)?

A: Both are functionally equivalent from an electrical standpoint. The 180-044-202L001 is obsolete, while the 180-044-203L001 is active. For new applications, the active 180-044-203L001 is the appropriate choice. For legacy system maintenance, the 180-044-202L001 may be considered only if the 180-044-203L001 is unavailable.