DBM25PN D-Sub 25 Position Plug Connector - Equivalent & Substitute Parts

Part Overview

The DBM25PN is a 25 Position D-Sub plug connector manufactured by Amphenol ICC (FCI) with male pins and solder cup termination. This connector is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. The DBM25PN operates within the DM HE508 series and is designed for free hanging (in-line) mounting applications requiring signal-level connectivity at 7.5A per contact and 300V rating.

Key Parameters

Parameter	DBM25PN Value
Connector Type	D-Sub Plug, Male Pins
Number of Positions	25
Shell Size / Layout	3 (DB, B)
Mounting Type	Free Hanging (In-Line)
Termination	Solder Cup
Current Rating	7.5A per Contact
Voltage Rating	300V
Operating Temperature	-55°C ~ 155°C
Shell Material / Finish	Steel, Yellow Cadmium Plated
Contact Finish	Gold
Flange Feature	Housing/Shell (Unthreaded)
Material Flammability	UL94 V-0
Product Status	Obsolete
RoHS Status	RoHS Non-Compliant

Substitute Part Grouping Explanation

Substitution for the DBM25PN is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Critical Parameters for Substitution:

Connector type: D-Sub plug with male pins
Position count: 25 positions
Shell size and layout: 3 (DB, B)
Termination method: Solder cup
Flange feature: Housing/Shell (Unthreaded)
Material flammability rating: UL94 V-0

Acceptable Variations:

Mounting type: Free hanging (in-line) or panel mount variants are functionally compatible when mechanical integration permits
Current rating: Substitutes with lower current ratings (5A or 3A) are acceptable for applications not requiring the full 7.5A capacity
Operating temperature range: Substitutes with narrower temperature ranges are acceptable if application requirements fall within the specified limits
Shell finish: Steel with different plating (nickel, tin) maintains electrical and mechanical compatibility
Contact material: Brass or copper alloy contacts with gold finish are electrically equivalent

Substitute Parts Identified:

Amphenol ICC (FCI) - Active Series: DBM25P (DM HE501 series) - Direct manufacturer upgrade with active product status
NorComp Inc. - Panel Mount Variants: 171-025-102L001, 171-025-102L031, 171-025-103L001, 171-025-103L011, 171-025-103L021, 171-025-103L031 (171 series) - Panel mount configurations with RoHS3 compliance
Amphenol ICC (Commercial Products) - Standard Series: L717SDB25P, L717SDB25PC309, L717SDB25PVFC309 (SD series) - RoHS compliant alternatives with reduced current rating

Parameter Comparison

Parameter	DBM25PN	DBM25P	171-025-103L001	171-025-103L021	L717SDB25P	L717SDB25PC309
Manufacturer	Amphenol ICC (FCI)	Amphenol ICC (FCI)	NorComp Inc.	NorComp Inc.	Amphenol ICC (Commercial)	Amphenol ICC (Commercial)
Connector Type	D-Sub Plug, Male Pins	D-Sub Plug, Male Pins	D-Sub Plug, Male Pins	D-Sub Plug, Male Pins	D-Sub Plug, Male Pins	D-Sub Plug, Male Pins
Positions	25	25	25	25	25	25
Shell Size	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)	Panel Mount	Panel Mount	Free Hanging (In-Line)	Free Hanging (In-Line)
Termination	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup
Current Rating	7.5A per Contact	7.5A per Contact	5A	5A	3A	3A
Voltage Rating	300V	300V	Not Specified	Not Specified	250V	250V
Operating Temperature	-55°C ~ 155°C	-55°C ~ 125°C	-50°C ~ 100°C	-50°C ~ 100°C	-55°C ~ 105°C	-55°C ~ 105°C
Shell Material / Finish	Steel, Yellow Cadmium Plated	Steel, Yellow Cadmium Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Tin Plated	Steel, Tin Plated
Contact Finish	Gold	Gold	Gold (Flash)	Gold (Flash)	Gold (Flash)	Gold (30.0µin)
Flange Feature	Housing/Shell (Unthreaded)	Housing/Shell (Unthreaded)	Housing/Shell (Unthreaded)	Cable Side (4-40)	Housing/Shell (Unthreaded)	Housing/Shell (Unthreaded)
Material Flammability	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	RoHS Non-Compliant	RoHS Non-Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS Compliant	RoHS Compliant

Engineering Selection Recommendations

Primary Recommendation: DBM25P

The DBM25P from Amphenol ICC (FCI) is the direct manufacturer equivalent with active product status. It maintains identical electrical specifications (7.5A per contact, 300V rating) and mechanical configuration (25 positions, shell size 3, solder cup termination, free hanging mounting). The only notable difference is the reduced upper operating temperature limit (-55°C ~ 125°C versus -55°C ~ 155°C). This part is suitable for applications where the full temperature range of the original DBM25PN is not required. Both parts remain RoHS non-compliant.

Secondary Recommendation: NorComp 171-025-103L001 or 171-025-103L021

These NorComp parts provide RoHS3 compliance and active product status. They are functionally compatible for applications where current requirements do not exceed 5A per contact and operating temperatures remain within -50°C ~ 100°C. The panel mount configuration requires mechanical integration verification. The 171-025-103L001 features housing/shell (unthreaded) flange, while 171-025-103L021 includes cable side (4-40) flange for screw-lock attachment. Both use nickel-plated steel shells with stamped copper alloy contacts.

Tertiary Recommendation: Amphenol ICC (Commercial Products) L717SDB25P Series

The L717SDB25P, L717SDB25PC309, and L717SDB25PVFC309 variants offer RoHS compliance and active product status. These parts are suitable for applications with current requirements not exceeding 3A per contact and operating temperatures within -55°C ~ 105°C. The reduced current rating and voltage specification (250V) limit their use to lower-power signal applications. The L717SDB25PVFC309 variant includes mating side female screwlock (4-40) for secure connector coupling.

Compliance Considerations:

Applications requiring RoHS compliance must transition to NorComp 171 series or Amphenol ICC L717 series parts. The original DBM25PN and its direct equivalent DBM25P remain non-compliant. Selection between compliant alternatives depends on current and temperature requirements specific to the application.

Frequently Asked Questions (FAQ)

Q: Can DBM25P directly replace DBM25PN without any modifications?

A: Yes, for applications where the operating temperature does not exceed 125°C. The DBM25P maintains identical electrical ratings (7.5A per contact, 300V), mechanical configuration (25 positions, shell size 3, solder cup termination), and mounting type (free hanging in-line). Both parts use identical shell material and contact finishes. Verify application temperature requirements before substitution.

Q: What is the primary difference between free hanging (in-line) and panel mount D-Sub connectors?

A: Free hanging (in-line) connectors attach directly to cable assemblies without requiring panel cutouts or mounting hardware. Panel mount connectors require mechanical integration into an enclosure or panel with appropriate mounting holes. The NorComp 171 series parts are panel mount variants and require different mechanical integration than the original DBM25PN.

Q: Are the NorComp 171-025-103L001 and 171-025-103L021 parts interchangeable?

A: Both parts are electrically and mechanically compatible with identical 25-position, shell size 3 configurations and solder cup termination. The primary difference is the flange feature: 171-025-103L001 has housing/shell (unthreaded) flange, while 171-025-103L021 has cable side (4-40) flange for screw-lock attachment. Selection depends on the specific mechanical coupling requirement.

Q: What does RoHS3 compliance mean for connector selection?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. The original DBM25PN uses yellow cadmium plating and is non-compliant. NorComp 171 series parts with nickel plating and Amphenol ICC L717 series parts with tin plating meet RoHS3 requirements. Applications subject to RoHS regulations must use compliant alternatives.

Q: Can L717SDB25P parts substitute for DBM25PN in high-current applications?

A: No. The L717SDB25P series is rated for 3A per contact, significantly lower than the DBM25PN's 7.5A rating. These parts are suitable only for signal-level applications not requiring the higher current capacity. For applications requiring 7.5A per contact, use DBM25P or verify that actual current requirements fall within the 3A limit.

Q: What is the significance of contact finish thickness specifications?

A: Contact finish thickness affects durability and electrical performance. The DBM25PN specifies gold contact finish without thickness detail. The L717SDB25PC309 specifies 30.0µin (0.76µm) gold thickness, providing defined wear characteristics. Flash gold finish on NorComp parts indicates minimal thickness for cost optimization. For applications with frequent mating cycles, thicker gold finishes provide extended contact life.

Q: Are there any packaging differences between substitute parts?

A: Yes. The DBM25PN is packaged in unspecified format with 856 pieces in stock. DBM25P uses tray packaging (705 pieces). NorComp 171 series parts use tray packaging with varying inventory levels (747-9499 pieces). Amphenol ICC L717 series parts use bulk or tray packaging (1083-3285 pieces). Packaging affects handling, storage, and procurement logistics but does not affect electrical or mechanical compatibility.

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