DDMF50S D-Sub 50 Position Receptacle Connector

Part Overview

The DDMF50S is a 50 position D-Sub receptacle connector manufactured by Amphenol ICC (FCI) in the DM HE501 series. This connector features female sockets with solder cup termination and is designed for free hanging in-line mounting applications. The part is currently active in production with 827 units in stock. Alternative equivalent parts may be required due to packaging preferences, material finish specifications, or supply chain considerations.

Substiute Parts

DDMF50S

Amphenol ICC (FCI)In Stock: 865DDMF50S Datasheet

Current PartRFQ

L77DD50S

Amphenol ICC (Commercial Products)In Stock: 1131L77DD50S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The L77DD50S qualifies as an equivalent substitute for the DDMF50S based on the following critical parameters:

Matching Parameters:

• Connector style: D-Sub
• Connector type: Receptacle, Female Sockets
• Number of positions: 50
• Number of rows: 3
• Shell size and layout: 5 (DD, D)
• Mounting type: Free Hanging (In-Line)
• Termination method: Solder Cup
• Voltage rating: 300V
• Current rating: 7.5A
• Operating temperature range: -55°C to 125°C
• Material flammability rating: UL94 V-0
• Moisture sensitivity level: 1 (Unlimited)

Differences:

• Shell material finish: Yellow Cadmium Plated (DDMF50S) vs. Tin Plated (L77DD50S)
• Contact material: Phosphor Bronze (DDMF50S) vs. Brass (L77DD50S)
• Contact finish thickness: Not specified (DDMF50S) vs. 8.00µin (L77DD50S)
• Dielectric material: Thermoplastic (DDMF50S) vs. Thermoplastic, Glass Filled (L77DD50S)
• RoHS compliance: Non-compliant (DDMF50S) vs. Compliant (L77DD50S)
• Packaging: Tray (DDMF50S) vs. Bulk (L77DD50S)
• Series designation: DM HE501 (DDMF50S) vs. D (L77DD50S)

Parameter Comparison

Engineering Selection Recommendations

Both the DDMF50S and L77DD50S are active production parts suitable for 50 position D-Sub receptacle applications with identical electrical and mechanical interface specifications. Selection between these parts should be based on the following criteria:

DDMF50S Selection:

• Applications where yellow cadmium plating is specified
• Designs utilizing phosphor bronze contact material
• Non-RoHS compliant applications
• Tray packaging preference

L77DD50S Selection:

• RoHS compliant designs and regulatory requirements
• Applications requiring tin plated shell finish
• Brass contact material specifications
• Bulk packaging preference
• Higher inventory availability (1065 units vs. 827 units)
• Glass filled dielectric material for enhanced mechanical properties

Both parts maintain identical electrical performance (300V, 7.5A), thermal operating range (-55°C to 125°C), and flammability rating (UL94 V-0). The choice between these equivalents depends on material finish requirements, RoHS compliance mandates, and packaging logistics rather than functional performance.

Frequently Asked Questions (FAQ)

Q: Are DDMF50S and L77DD50S mechanically interchangeable?

A: Yes. Both connectors share identical D-Sub shell size 5 (DD, D) configuration, 50 position layout with 3 rows, and free hanging in-line mounting type. They are mechanically interchangeable in applications where the connector interface is the primary requirement.

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

A: The DDMF50S uses yellow cadmium plating while the L77DD50S uses tin plating. Both finishes provide corrosion protection on steel shells. Selection depends on application environment and material specifications. Cadmium plating is restricted in RoHS compliant designs.

Q: Do the contact material differences affect electrical performance?

A: Both phosphor bronze (DDMF50S) and brass (L77DD50S) contacts with gold plating maintain the same electrical specifications: 300V voltage rating and 7.5A current rating. Contact material selection is based on mechanical durability and cost considerations rather than electrical performance.

Q: What does RoHS compliance mean for part selection?

A: The L77DD50S is RoHS compliant, meeting restrictions on hazardous substances including cadmium. The DDMF50S is non-compliant due to cadmium plating. RoHS compliance is mandatory for many applications, particularly in consumer electronics and regulated industries.

Q: How do packaging differences affect ordering?

A: DDMF50S is supplied in tray packaging while L77DD50S is supplied in bulk packaging. Packaging choice affects handling, storage, and integration into assembly processes. The L77DD50S has higher inventory availability (1065 units vs. 827 units).

Q: Is the glass filled dielectric material in L77DD50S significant?

A: Glass filled thermoplastic provides enhanced mechanical strength and dimensional stability compared to standard thermoplastic. This improves durability in high-vibration or high-stress applications, though both materials meet UL94 V-0 flammability requirements.

Q: Can these parts be used interchangeably in existing designs?

A: Interchangeability depends on design specifications. If the design specifies cadmium plating, phosphor bronze contacts, or non-RoHS materials, the DDMF50S is required. If RoHS compliance or tin plating is specified, the L77DD50S is required. Verify material finish and compliance requirements before substitution.