L77DDH50SOL2RM5

Part Overview

The L77DDH50SOL2RM5 is a 50-position D-Sub receptacle connector with female sockets manufactured by Amphenol ICC (Commercial Products). This connector features board-side flange mounting with solder termination and is rated for 7.5A per contact at 300V. The part maintains active product status with full RoHS compliance and is currently stocked at 899 units in original condition. Equivalent and substitute part numbers are identified for applications where the primary part is unavailable or where specific design parameters permit alternative selections.

Substiute Parts

L77DDH50SOL2RM5

Amphenol ICC (Commercial Products)In Stock: 990L77DDH50SOL2RM5 Datasheet

Current PartRFQ

172-050-212R001

NorComp Inc.In Stock: 772172-050-212R001 Datasheet

SimilarRFQ

DDM50S332N

Amphenol ICC (FCI)In Stock: 871DDM50S332N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the L77DDH50SOL2RM5 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Core Electrical Parameters: Connector style (D-Sub), connector type (receptacle with female sockets), number of positions (50), and number of rows (3) must remain constant. Shell size and connector layout (5/DD, D) are also fixed requirements.

Mechanical Parameters: Mounting type, flange feature configuration, and through-hole solder termination are essential for PCB assembly compatibility.

Environmental and Compliance Parameters: UL94 V-0 flammability rating, operating temperature range tolerance, and regulatory compliance status (RoHS, REACH) are critical for safety and regulatory adherence.

Electrical Performance Parameters: Current rating (7.5A per contact) and voltage rating (300V) establish the minimum electrical capability requirements.

The following substitute parts satisfy these criteria with acceptable variations in shell material finish, contact material composition, and contact finish thickness, provided these variations do not reduce the required electrical or mechanical performance.

Parameter Comparison

Engineering Selection Recommendations

DDM50S332N (Amphenol ICC FCI): This part is functionally equivalent to the L77DDH50SOL2RM5 across all core electrical and mechanical parameters. Both parts support 7.5A per contact, 300V rating, and the identical 50-position D-Sub configuration with solder termination. Operating temperature ranges are identical. However, the DDM50S332N carries RoHS non-compliant status, which may restrict its use in applications requiring regulatory compliance with RoHS Directive 2011/65/EU. The contact material differs (phosphor bronze versus brass), but both satisfy UL94 V-0 flammability requirements. This part is appropriate for applications where RoHS compliance is not mandatory.

172-050-212R001 (NorComp Inc.): This part shares the core D-Sub receptacle configuration with 50 positions and 3 rows. However, critical electrical performance differences limit its use as a direct substitute. The current rating is reduced to 5A per contact, which is below the 7.5A specification of the primary part. The operating temperature range is narrower (-50°C to 100°C versus -55°C to 125°C), reducing thermal operating margin. Voltage rating is not specified, introducing uncertainty in electrical capability. The flange feature differs (housing/shell unthreaded versus board side), affecting PCB mounting compatibility. Additionally, the part carries obsolete product status. This part is suitable only for applications with reduced current requirements (≤5A per contact) and narrower operating temperature ranges where the lower current rating and discontinued status are not constraints.

Frequently Asked Questions (FAQ)

Q: Can DDM50S332N be used in place of L77DDH50SOL2RM5 in RoHS-regulated applications? A: No. DDM50S332N carries RoHS non-compliant status. Applications requiring RoHS Directive compliance must use L77DDH50SOL2RM5 or equivalent RoHS-compliant alternatives.

Q: Is 172-050-212R001 a full electrical equivalent to L77DDH50SOL2RM5? A: No. The current rating of 172-050-212R001 is 5A per contact, compared to 7.5A for L77DDH50SOL2RM5. Circuits designed for 7.5A operation will exceed the safe current limit of this substitute part.

Q: What is the impact of the different flange features between the parts? A: The flange feature affects mechanical mounting. L77DDH50SOL2RM5 uses board-side flange (4-40 mounting), while 172-050-212R001 and DDM50S332N use housing/shell unthreaded flanges. PCB mounting hole patterns and fastening methods must be verified before substitution.

Q: Does the difference in contact material (brass vs. phosphor bronze) affect electrical performance? A: Both brass and phosphor bronze contacts provide adequate conductivity and contact resistance for D-Sub receptacle applications. Both materials satisfy UL94 V-0 flammability requirements. The difference does not degrade electrical performance within the specified voltage and current ratings.

Q: Can these substitute parts be used in high-temperature applications reaching 125°C? A: DDM50S332N is rated to 125°C and is suitable. 172-050-212R001 is rated only to 100°C maximum and is not suitable for applications requiring sustained operation at temperatures above 100°C.

Q: What is the significance of the contact finish thickness difference? A: Contact finish thickness affects contact durability and wear characteristics. L77DDH50SOL2RM5 has 8.00µin finish, DDM50S332N has 50.0µin, and 172-050-212R001 has flash finish. Thicker finishes generally provide longer service life in high-cycle mating applications. Flash finish (172-050-212R001) provides minimal corrosion protection.