DBMM25PH D-Sub Connector Equivalent & Substitute Parts

Part Overview

The DBMM25PH is a 25-position D-Sub plug connector manufactured by ITT Cannon, LLC, designed for panel mount, through-hole solder termination applications. This connector features male pins with a DB/B shell size (Size 3) and is classified as active product status. The connector is constructed with steel shell (yellow chromate plated zinc finish), gold-plated contacts, and polycyclohexylenedimethylene terephthalate (PCT) dielectric material.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when supply chain optimization is required, or when design flexibility allows for alternative manufacturers meeting the same electrical and mechanical specifications.

Substiute Parts

DBMM25PH

ITT Cannon, LLCIn Stock: 1133DBMM25PH Datasheet

Current PartRFQ

172-025-112R021

NorComp Inc.In Stock: 1103172-025-112R021 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DBMM25PH is determined by strict alignment with the following core parameters:

• Connector style: D-Sub
• Connector type: Plug with male pins
• Position count: 25 positions
• Row configuration: 2 rows
• Shell size: 3 (DB, B layout)
• Mounting configuration: Panel mount, through-hole
• Termination method: Solder
• Contact type: Signal
• Flammability rating: UL94 V-0

The substitute part 172-025-112R021 (NorComp Inc.) meets all mandatory mechanical and electrical compatibility criteria. However, differences exist in shell material finish, contact finish thickness, current rating, operating temperature range, and product status that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The DBMM25PH (ITT Cannon, LLC) is the primary specification part with active product status and full RoHS compliance. This part is recommended for new designs and applications requiring long-term supply availability.

The 172-025-112R021 (NorComp Inc.) is classified as obsolete product status. While this substitute maintains mechanical and electrical compatibility for the core D-Sub 25-position plug configuration, the following considerations apply:

• Current rating is reduced from 7.5A to 5A, requiring verification that application current requirements do not exceed 5A
• Operating temperature range is narrower (-50°C to 100°C versus -55°C to 150°C), requiring confirmation that application temperature extremes remain within this range
• Shell finish differs (tin plated versus yellow chromate plated zinc), which may affect corrosion resistance in specific environmental conditions
• Contact finish thickness is flash versus 50.0µin, potentially affecting contact durability in high-cycle mating applications
• Obsolete product status indicates limited future availability

The 172-025-112R021 is suitable only for legacy system maintenance, repair, or replacement scenarios where the reduced specifications align with application requirements.

Frequently Asked Questions (FAQ)

Q: Can the 172-025-112R021 be used as a direct replacement for the DBMM25PH in new designs?

A: No. The 172-025-112R021 is obsolete product status and has reduced current rating (5A versus 7.5A) and narrower operating temperature range (-50°C to 100°C versus -55°C to 150°C). New designs should specify the DBMM25PH.

Q: What are the mechanical compatibility requirements for D-Sub 25-position plug substitution?

A: Substitute parts must maintain identical connector style (D-Sub), connector type (plug with male pins), position count (25), row configuration (2), shell size (3 DB/B layout), mounting type (panel mount, through-hole), and termination method (solder).

Q: Are there differences in contact durability between the DBMM25PH and 172-025-112R021?

A: Yes. The DBMM25PH has specified contact finish thickness of 50.0µin (1.27µm), while the 172-025-112R021 has flash thickness. Thicker contact plating generally provides longer mating cycle life. Applications with high mating cycle requirements should verify compatibility.

Q: What is the significance of the shell material finish difference?

A: The DBMM25PH uses yellow chromate plated zinc finish, while the 172-025-112R021 uses tin plated finish. These finishes provide different corrosion resistance profiles. Applications in corrosive environments should verify that the substitute finish meets environmental requirements.

Q: Can the 172-025-112R021 be used in applications requiring the full -55°C to 150°C temperature range?

A: No. The 172-025-112R021 operating temperature range is -50°C to 100°C. Applications requiring operation below -50°C or above 100°C must use the DBMM25PH or verify that the substitute part meets specific temperature requirements.

Q: What is the current rating limitation for the 172-025-112R021?

A: The 172-025-112R021 is rated for 5A maximum current, compared to 7.5A for the DBMM25PH. Applications requiring current above 5A must use the DBMM25PH or verify that circuit current remains within the 5A limit.