DBM25P043N D-Sub 25 Position Plug Connector Equivalent & Substitute Parts

Part Overview

The DBM25P043N is a 25 position D-Sub plug connector manufactured by Amphenol ICC (FCI) in the DM HE508 series. This free hanging, in-line solder cup connector features male pins with a 3 (DB, B) shell size and is designed for signal applications requiring 7.5A per contact at 300V. The part is currently active in production with 719 units in stock.

Substitute parts are necessary when the original DBM25P043N becomes unavailable, when design requirements shift from free hanging to panel mount configurations, or when alternative manufacturers' components meet the same electrical and mechanical specifications within acceptable parameter tolerances.

Key Parameters

Parameter	DBM25P043N
Connector Type	Plug, Male Pins
Number of Positions	25
Number of Rows	2
Shell Size, Connector Layout	3 (DB, B)
Mounting Type	Free Hanging (In-Line)
Termination	Solder Cup
Current Rating (Amps)	7.5A per Contact
Voltage Rating	300V
Operating Temperature	-55°C ~ 155°C
Shell Material, Finish	Steel, Yellow Cadmium Plated
Contact Finish	Gold
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS non-compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution logic for the DBM25P043N is determined by the following critical parameters:

Electrical Compatibility Parameters:

Connector type (Plug, Male Pins)
Number of positions (25)
Number of rows (2)
Shell size and layout (3 / DB, B)
Termination method (Solder Cup)
Contact finish (Gold)
Material flammability rating (UL94 V-0)

Mechanical Compatibility Parameters:

Mounting type (Free Hanging / In-Line vs. Panel Mount)
Flange feature configuration
Shell material and finish

Electrical Performance Parameters:

Current rating per contact
Voltage rating
Operating temperature range

Substitute parts are grouped into two categories:

Category A - Panel Mount Alternatives (NorComp 171 Series): These parts maintain the 25-position, 2-row D-Sub configuration with solder cup termination and gold-plated contacts. They differ in mounting type (panel mount vs. free hanging) and offer multiple flange configurations. Current rating is reduced to 5A per contact, and operating temperature range is narrower (-50°C ~ 100°C). These are suitable for applications where panel mounting is acceptable and current requirements do not exceed 5A per contact.

Category B - Free Hanging Alternatives (Amphenol SD Series): These parts maintain the free hanging, in-line mounting configuration and 25-position layout. They are manufactured by Amphenol ICC (Commercial Products) in the SD series. Current rating is reduced to 3A per contact, and voltage rating is 250V. Operating temperature range is -55°C ~ 105°C. These are suitable for lower current applications where the original free hanging configuration must be preserved.

Parameter Comparison

Parameter	DBM25P043N	171-025-102L001	171-025-102L031	171-025-103L001	171-025-103L011	171-025-103L021	171-025-103L031	L717SDB25P	L717SDB25PC309	L717SDB25PVFC309	L717SDBG25P
Manufacturer	Amphenol ICC (FCI)	NorComp Inc.	NorComp Inc.	NorComp Inc.	NorComp Inc.	NorComp Inc.	NorComp Inc.	Amphenol ICC (Commercial)	Amphenol ICC (Commercial)	Amphenol ICC (Commercial)	Amphenol ICC (Commercial)
Connector Type	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins
Number of Positions	25	25	25	25	25	25	25	25	25	25	25
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
Shell Size, Connector Layout	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)
Mounting Type	Free Hanging (In-Line)	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Free Hanging (In-Line)	Free Hanging (In-Line)	Free Hanging (In-Line)	Free Hanging (In-Line)
Termination	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup
Current Rating (Amps)	7.5A per Contact	5A	5A	5A	5A	5A	5A	3A	3A	3A	3A
Voltage Rating	300V	—	—	—	—	—	—	250V	250V	250V	250V
Operating Temperature	-55°C ~ 155°C	-50°C ~ 100°C	-50°C ~ 100°C	-50°C ~ 100°C	-50°C ~ 100°C	-50°C ~ 100°C	-50°C ~ 100°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Shell Material, Finish	Steel, Yellow Cadmium Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Contact Form	Machined	Stamped	Stamped	Stamped	Stamped	Stamped	Stamped	Stamped	Stamped	Stamped	Stamped
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Product Status	Active	Obsolete	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For Panel Mount Applications with Reduced Current Requirements:

The NorComp 171 series (171-025-103L001, 171-025-103L011, 171-025-103L021, 171-025-103L031) are active production parts suitable for panel mount configurations. These parts are ROHS3 compliant and REACH unaffected, offering improved environmental compliance compared to the DBM25P043N. Selection among these four variants depends on flange feature requirements:

171-025-103L001: Housing/Shell (Unthreaded) flange
171-025-103L011: Cable Side (4-40) flange
171-025-103L021: Cable Side (4-40) flange
171-025-103L031: Mating Side (4-40) flange

All four variants feature nickel-plated steel shells, stamped contacts, and support wire gauges 20-28 AWG. Current rating is limited to 5A per contact, and operating temperature range is -50°C ~ 100°C. These parts are not suitable for applications requiring the full 7.5A per contact or extended temperature operation above 100°C.

For Free Hanging In-Line Applications with Reduced Current Requirements:

The Amphenol SD series (L717SDB25P, L717SDB25PC309, L717SDB25PVFC309, L717SDBG25P) maintain the free hanging, in-line mounting configuration. All variants are active production parts with RoHS compliance. Selection depends on flange feature and packaging requirements:

L717SDB25P: Housing/Shell (Unthreaded) flange, bulk packaging
L717SDB25PC309: Housing/Shell (Unthreaded) flange, tray packaging
L717SDB25PVFC309: Mating Side, Female Screwlock (4-40) flange, tray packaging
L717SDBG25P: Cable Side (M3) flange, tray packaging

All SD series variants feature tin-plated steel shells, stamped contacts, and 20 AWG wire gauge. Current rating is limited to 3A per contact, and voltage rating is 250V. Operating temperature range is -55°C ~ 105°C, which is narrower than the original part at the upper limit (105°C vs. 155°C).

Compliance Considerations:

All substitute parts listed are RoHS compliant, whereas the DBM25P043N is RoHS non-compliant. Applications subject to RoHS directives must use substitute parts. The NorComp 171 series additionally carries REACH unaffected status.

Current and Voltage Derating:

All substitute parts operate at reduced current ratings (5A or 3A per contact vs. 7.5A). Applications requiring the full 7.5A per contact cannot use these substitutes. The Amphenol SD series is additionally limited to 250V, compared to the original 300V rating.

Frequently Asked Questions (FAQ)

Q: Can I use a NorComp 171 series part as a direct replacement for the DBM25P043N?

A: Not as a direct replacement. The NorComp 171 series parts are panel mount connectors, whereas the DBM25P043N is free hanging (in-line). Panel mount parts require a different installation method and cannot be used in applications designed for in-line solder cup termination. Additionally, the current rating is reduced from 7.5A to 5A per contact.

Q: What is the difference between the four NorComp 171-025-103L variants?

A: All four variants (171-025-103L001, 171-025-103L011, 171-025-103L021, 171-025-103L031) are electrically and mechanically identical except for the flange feature configuration. The flange feature determines how the connector is mounted or secured: Housing/Shell (Unthreaded), Cable Side (4-40), or Mating Side (4-40). Select the variant matching your mechanical mounting requirements.

Q: Can I use an Amphenol SD series part (L717SDB25P, etc.) as a substitute for the DBM25P043N?

A: The SD series maintains the free hanging, in-line configuration, making it mechanically compatible. However, the current rating is reduced to 3A per contact (vs. 7.5A), and voltage rating is reduced to 250V (vs. 300V). Use SD series parts only if your application current requirements do not exceed 3A per contact and voltage does not exceed 250V.

Q: What is the difference between L717SDB25P and L717SDB25PC309?

A: Both parts are electrically and mechanically identical. The primary difference is packaging: L717SDB25P is supplied in bulk packaging, while L717SDB25PC309 is supplied in tray packaging. Select based on your procurement and handling requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are RoHS compliant. The original DBM25P043N is RoHS non-compliant. If your application is subject to RoHS directives, any of the listed substitute parts will meet compliance requirements.

Q: What is the operating temperature limitation of the substitute parts?

A: The NorComp 171 series operates from -50°C to 100°C, and the Amphenol SD series operates from -55°C to 105°C. The original DBM25P043N operates from -55°C to 155°C. If your application requires operation above 105°C, none of the listed substitute parts are suitable.

Q: Can I use a substitute part with a different flange feature than the original?

A: Flange features determine mechanical mounting method. Substituting a part with a different flange feature requires corresponding changes to the mechanical mounting design. Ensure the new flange feature is compatible with your application's mounting structure before substitution.

Q: What does "Stamped" vs. "Machined" contact form mean?

A: Contact form refers to the manufacturing method. Machined contacts are individually formed from solid material, while stamped contacts are formed from sheet material. The DBM25P043N uses machined contacts, while all substitute parts use stamped contacts. Both forms provide electrical conductivity; the difference is primarily in manufacturing process and cost.

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