MDMH25SS Micro-D Receptacle Connector - Equivalent & Substitute Parts

Part Overview

The MDMH25SS is a 25-position D-Type Micro-D receptacle connector manufactured by ITT Cannon, LLC, designed for panel mount applications with solder cup termination. This connector features female sockets, shielded construction, and operates across the industrial temperature range of -55°C to 125°C. The part is currently active in production with 762 units in stock.

Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable, when different packaging requirements exist, or when alternative material specifications meet application requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

MDMH25SS

ITT Cannon, LLCIn Stock: 796MDMH25SS Datasheet

Current PartRFQ

MDM-25SSP

ITT Cannon, LLCIn Stock: 1097MDM-25SSP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MDMH25SS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Connector Style: D-Type, Micro-D
• Connector Type: Receptacle, Female Sockets
• Number of Positions: 25
• Number of Rows: 2
• Mounting Type: Panel Mount
• Shell Size, Connector Layout: 0.050 Pitch x 0.043 Row to Row
• Contact Type: Signal
• Flange Feature: Mating Side, Female Screwlock (2-56)
• Termination: Solder Cup
• Current Rating: 3A
• Features: Shielded
• Operating Temperature: -55°C ~ 125°C
• Contact Material: Copper Alloy
• Contact Finish: Gold
• Moisture Sensitivity Level: 1 (Unlimited)

The substitute part MDM-25SSP meets all mandatory matching parameters and is therefore electrically and mechanically compatible with the MDMH25SS. Differences in shell material finish (Steel, Tin-Lead Plated versus Aluminum, Yellow Chromate Plated Cadmium) and dielectric material (Diallyl Phthalate versus Liquid Crystal Polymer) do not affect functional compatibility within the specified electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

Both MDMH25SS and MDM-25SSP are active production parts from ITT Cannon, LLC, classified under ECCN EAR99 with identical export control status. Selection between these parts should be based on the following criteria:

MDMH25SS Selection Criteria:

• Primary choice when steel shell construction with tin-lead plating is specified
• Applications requiring Diallyl Phthalate dielectric material
• When packaging specification is critical to procurement workflow

MDM-25SSP Selection Criteria:

• Alternative source when MDMH25SS inventory is constrained
• Applications where aluminum shell construction with yellow chromate cadmium plating is acceptable
• When Liquid Crystal Polymer dielectric material meets application requirements
• Bulk packaging availability supports high-volume procurement

Both parts maintain identical electrical performance, mechanical interface compatibility, and operating specifications across the full temperature range. The differences in shell material and dielectric composition do not affect signal integrity, current carrying capacity, or connector mating characteristics within the specified 25-position, 0.050-pitch Micro-D configuration.

Frequently Asked Questions (FAQ)

Q: Are MDMH25SS and MDM-25SSP mechanically interchangeable?

A: Yes. Both connectors feature identical mounting type (panel mount), shell size (0.050 pitch x 0.043 row to row), flange configuration (mating side female screwlock 2-56), and 25-position layout. They mate with identical plug connectors and occupy the same panel cutout dimensions.

Q: What is the difference in shell material between these parts?

A: MDMH25SS uses steel with tin-lead plating. MDM-25SSP uses aluminum with yellow chromate cadmium plating. Both provide equivalent shielding effectiveness and environmental protection for the internal contact structure.

Q: Can I use MDM-25SSP as a direct replacement for MDMH25SS in existing designs?

A: Yes, provided the application does not specify steel shell material or Diallyl Phthalate dielectric as a design requirement. The electrical and mechanical performance is equivalent across all specified parameters.

Q: What is the difference in dielectric material?

A: MDMH25SS uses Diallyl Phthalate (DAP), glass filled. MDM-25SSP uses Liquid Crystal Polymer (LCP). Both materials provide adequate dielectric strength and insulation resistance for signal-level applications at 3A current rating.

Q: Are there compliance differences between these parts?

A: MDMH25SS carries no specified RoHS or REACH status in the provided data. MDM-25SSP is marked as RoHS non-compliant and REACH Affected. Applications subject to RoHS or REACH requirements must use MDMH25SS.

Q: What does Moisture Sensitivity Level 1 mean?

A: MSL 1 indicates unlimited shelf life without moisture control requirements. Both parts can be stored and handled without desiccant packaging or humidity-controlled environments.

Q: Which part should I specify for new designs?

A: Specify MDMH25SS as the primary part number. Use MDM-25SSP only as an approved alternate when documented as compatible with your application requirements and compliance obligations.

Q: What is the current rating for both connectors?

A: Both parts are rated for 3A continuous current per contact. This rating applies to the signal contacts in the 25-position configuration.

Q: Do these connectors require any special handling during assembly?

A: Both parts feature MSL 1 rating, eliminating moisture sensitivity concerns. Standard PCB assembly and solder cup termination procedures apply to both parts without modification.