L77HDB44SVFMC309 Equivalent & Substitute Parts

Part Overview

The L77HDB44SVFMC309 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, a mating side female screwlock flange (M3), and free hanging (in-line) mounting. The product is currently active in production.

Equivalent and substitute parts become necessary when managing inventory, responding to supply chain constraints, or accommodating specific application requirements such as mounting configuration changes or environmental operating conditions. The substitute parts listed maintain the core 44-position D-Sub High Density receptacle configuration and female socket contact type, but differ in mounting method, shell material finish, and operating temperature ranges.

Substiute Parts

L77HDB44SVFMC309

Amphenol ICC (Commercial Products)In Stock: 801L77HDB44SVFMC309 Datasheet

Current PartRFQ

180-044-202L001

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

SimilarRFQ

180-044-202L011

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

SimilarRFQ

180-044-203L001

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

SimilarRFQ

180-044-203L011

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitutability for the L77HDB44SVFMC309 is determined by the following critical parameters that must be maintained or are compatible with system requirements:

Mandatory Compatibility Parameters:

• 44-position D-Sub High Density connector configuration
• Receptacle with female socket contacts
• Solder cup termination
• 3-row (DB, B) High Density shell size layout
• UL94 V-0 flammability rating
• Steel shell material (tin or nickel plated variants acceptable)
• Gold contact finish
• Signal contact type

Parameters Allowing Variation:

• Mounting method (free hanging vs. panel mount)
• Flange feature design (M3 screwlock vs. unthreaded housing vs. cable side 4-40)
• Shell finish (tin plated vs. nickel plated)
• Operating temperature range (-50°C to 100°C acceptable for applications not requiring full -55°C to 155°C range)
• Current rating (5A rated substitutes acceptable for 3A applications)
• Contact material composition (brass vs. phosphor bronze)

The four NorComp Inc. substitute parts (180-044-202L001, 180-044-202L011, 180-044-203L001, 180-044-203L011) maintain the core 44-position D-Sub High Density receptacle architecture while offering panel mount configurations as alternatives to the free hanging mounting of the main part.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Products): The NorComp Inc. parts 180-044-203L001 and 180-044-203L011 are preferred substitutes where panel mount configuration is acceptable. Both parts carry Active product status, ensuring ongoing production support and availability. These parts are ROHS3 Compliant and feature nickel-plated steel shells, providing enhanced corrosion resistance compared to the tin-plated finish of the main part. The higher 5A current rating accommodates applications with current demands up to 5A without derating concerns.

Selection between 180-044-203L001 and 180-044-203L011 depends on flange requirements: 180-044-203L001 features unthreaded housing shell flange, while 180-044-203L011 provides cable-side 4-40 screw flange.

Alternative Substitutes (Obsolete Products): The NorComp Inc. parts 180-044-202L001 and 180-044-202L011 carry Obsolete product status. While electrically and mechanically compatible with the main part, these connectors are no longer in active production. Use of obsolete parts should be limited to legacy system maintenance or where existing inventory exists. These parts differ from the active alternatives only in shell finish (tin-plated vs. nickel-plated).

Substitution Limitations: Applications requiring the full operating temperature range of -55°C to 155°C cannot use NorComp substitutes, which are limited to -50°C to 100°C. The main part's free hanging (in-line) mounting is unique; all substitutes support panel mount only. Applications with design constraints on flange type (M3 female screwlock) must retain the main part, as substitute flange configurations differ.

Frequently Asked Questions (FAQ)

Q: Can I substitute a panel mount connector for a free hanging connector? A: Panel mount and free hanging connectors have fundamentally different mechanical mounting interfaces. A panel mount connector (like the NorComp substitutes) is designed for installation through a panel cutout with shell flange securement, while the free hanging connector (L77HDB44SVFMC309) mounts directly to cable or in-line circuitry. Substitution requires modification to the system's mechanical structure to accommodate the different mounting method.

Q: Do the operating temperature ranges of the NorComp substitutes affect signal integrity? A: Operating temperature range specifies the environmental conditions under which the connector maintains its electrical specifications. NorComp substitutes rated to -50°C to 100°C can be used in applications operating within this range without performance degradation. Applications requiring operation below -50°C or above 100°C must use the main part (L77HDB44SVFMC309), rated to -55°C to 155°C.

Q: What is the difference between tin-plated and nickel-plated shell finishes? A: Both finishes provide corrosion protection on the steel shell. Tin-plated shells (L77HDB44SVFMC309, 180-044-202L001, 180-044-202L011) offer cost efficiency. Nickel-plated shells (180-044-203L001, 180-044-203L011) provide enhanced corrosion resistance in high-humidity or chemically aggressive environments. Selection depends on environmental exposure and application lifespan requirements.

Q: Why do NorComp substitutes have higher current ratings (5A) than the main part (3A)? A: Current rating is determined by contact geometry, material composition, and termination method. Higher current rating indicates the connector can safely handle higher current without excessive heating or contact degradation. A 5A-rated connector is suitable for applications requiring 3A or less; the higher rating provides additional margin and design flexibility without introducing compatibility issues.

Q: Are obsolete NorComp parts acceptable for new designs? A: Obsolete parts should not be specified for new product designs. Design specifications should use only active products to ensure long-term supply chain stability and continued manufacturer support. The obsolete NorComp parts (180-044-202L001, 180-044-202L011) are listed for cross-reference purposes only, facilitating identification of alternative sources for legacy systems currently using these connectors.

Q: What contacts are compatible with this connector type? A: This connector is a receptacle with female socket contacts. Compatible mating contacts are male pins. The pin size and layout conform to the 44-position D-Sub High Density configuration. All listed substitutes share this receptacle/female socket configuration and are mechanically compatible with the same male pin assemblies.

Q: Does RoHS3 compliance on NorComp parts affect compatibility with RoHS Compliant main part? A: RoHS3 Compliant status indicates the part meets Restriction of Hazardous Substances Directive requirements. RoHS Compliant (main part) and ROHS3 Compliant (substitutes) are both compliant standards. Mixing compliant and non-compliant components within an assembly may create compliance documentation issues; however, these parts are electrically and mechanically compatible regardless of their individual RoHS certification level.