DBM25P500MN D-Sub 25 Position Plug Connector - Equivalent & Substitute Parts

Part Overview

The DBM25P500MN is a 25 position D-Sub plug connector manufactured by Amphenol ICC (FCI) with right-angle solder termination and through-hole mounting. This connector features a 2-row configuration in shell size 3 (DB, B) with gold-plated brass contacts rated for 7.5A per contact at 300V. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring compatible alternatives.

Key Parameters

Parameter	DBM25P500MN
Connector Type	Plug, Male Pins
Number of Positions	25
Number of Rows	2
Shell Size	3 (DB, B)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Current Rating	7.5A per Contact
Voltage Rating	300V
Operating Temperature	-55°C to 155°C
Shell Material/Finish	Steel, Cadmium Plated
Contact Material/Finish	Brass, Gold Plated
Flange Feature	Housing/Shell (Unthreaded)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the DBM25P500MN is determined by the following critical parameters:

Core Compatibility Requirements:

Connector type: Plug with male pins
Position count: 25 positions
Row configuration: 2 rows
Shell size: 3 (DB, B)
Mounting: Through hole, right angle
Termination: Solder
Contact type: Signal

Performance Constraints:

Current rating must meet or exceed application requirements (original rated 7.5A per contact)
Voltage rating must meet or exceed 300V
Operating temperature range must encompass -55°C to 155°C or be acceptable for the specific application
Contact finish must provide equivalent electrical performance (gold plating acceptable)

Mechanical Compatibility:

Backset spacing variations are acceptable within standard D-Sub tolerances
Flange feature variations (unthreaded housing, board-side, mating-side screwlock) are acceptable provided mechanical mounting is compatible with the application
Contact form (machined vs. stamped) does not affect substitution eligibility

Regulatory Considerations:

RoHS compliance status is noted but does not preclude substitution; selection depends on application requirements
All listed substitutes maintain MSL 1 (Unlimited) moisture sensitivity

Parameter Comparison

Parameter	DBM25P500MN	DBM25P500M	09653626817	09653627817	09663627817	1757845-3	5745436-3	L717SDB25P1ACH4R	L717SDB25PA4CHC309	L777SDB25P1ACH3F	L777SDB25P1ACH4F
Manufacturer	Amphenol ICC (FCI)	Amphenol ICC (FCI)	HARTING	HARTING	HARTING	TE Connectivity Aerospace, Defense and Marine	TE Connectivity AMP Connectors	Amphenol ICC (Commercial Products)	Amphenol ICC (Commercial Products)	Amphenol ICC (Commercial Products)	Amphenol ICC (Commercial Products)
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
Positions	25	25	25	25	25	25	25	25	25	25	25
Rows	2	2	2	2	2	2	2	2	2	2	2
Shell Size	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	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Current Rating (Amps)	7.5	7.5	6.5	6.5	7.5	5.0	6.0	3.0	3.0	3.0	3.0
Voltage Rating (V)	300	300	—	—	—	—	125	250	250	250	250
Operating Temperature (°C)	-55 to 155	-55 to 125	-55 to 125	-55 to 125	-55 to 125	-55 to 125	-55 to 105	-55 to 125	-55 to 125	-55 to 125	-55 to 125
Shell Material/Finish	Steel, Cadmium Plated	Steel, Yellow Cadmium Plated	Steel	Steel	Steel	Steel, Yellow Chromate Plated Zinc	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated
Contact Material/Finish	Brass, Gold	Brass, Gold	Copper Alloy	Copper Alloy	Copper Alloy	Brass, Gold	Brass, Gold	Brass, Gold	Brass, Gold	Brass, Gold	Brass, Gold
Backset Spacing (inches)	0.370	0.406	0.409	0.409	—	0.318	0.454	0.406	0.318	0.406	0.406
Flange Feature	Housing/Shell (Unthreaded)	Housing/Shell (Unthreaded)	Mating Side, Female Screwlock (4-40)	Mating Side, Female Screwlock (4-40)	Mating Side, Female Screwlock (4-40)	Housing/Shell (Unthreaded)	Mating Side, Standard Screws	Board Side (4-40)	Housing/Shell (Unthreaded)	Mating Side, Female Screwlock (M3)	Mating Side, Female Screwlock (4-40)
Product Status	Obsolete	Active	Active	Active	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Compliant	Non-compliant	Compliant	Compliant

Engineering Selection Recommendations

Primary Substitute (Highest Compatibility): DBM25P500M is the direct successor to DBM25P500MN from the same manufacturer (Amphenol ICC FCI). Both share identical electrical specifications (7.5A per contact, 300V rating), connector configuration, and termination method. The primary difference is product status (active vs. obsolete) and packaging format (tray vs. bulk). This part is recommended for direct replacement in new designs and ongoing production.

Active Alternatives with Full Electrical Compatibility: 09663627817 (HARTING) matches the original part's 7.5A current rating and maintains all core mechanical and electrical parameters. This part is obsolete but shares identical specifications with active HARTING alternatives 09653626817 and 09653627817, which are rated for 6.5A. These HARTING parts feature board lock and grounding indents, with ROHS3 compliance.

1757845-3 (TE Connectivity Aerospace, Defense and Marine) is an active military-grade alternative (MIL-DTL-24308, AMPLIMITE 109 series) with gold-plated contacts and yellow chromate plating. Current rating is 5A, which is lower than the original specification but acceptable for applications not requiring the full 7.5A capacity.

Active Alternatives with Reduced Current Rating: 5745436-3 (TE Connectivity AMP Connectors, AMPLIMITE HDP-20 series) is rated for 6A per contact with 125V voltage rating. Operating temperature is limited to -55°C to 105°C. This part is suitable for applications with lower current and temperature requirements.

L717SDB25P1ACH4R and L717SDB25PA4CHC309 (Amphenol ICC Commercial Products, SD series) are rated for 3A per contact at 250V. These parts feature board lock and grounding indents with RoHS compliance. Backset spacing varies (0.406" vs. 0.318"), which may affect mechanical fit depending on PCB layout.

L777SDB25P1ACH3F and L777SDB25P1ACH4F (Amphenol ICC Commercial Products, SD series) are also rated for 3A per contact at 250V with identical mechanical and electrical characteristics to the L717 variants. The primary difference is flange feature configuration (mating-side female screwlock M3 vs. 4-40).

Selection Criteria by Application:

For applications requiring the original 7.5A rating: Select DBM25P500M or 09663627817
For military or aerospace applications: Select 1757845-3
For RoHS-compliant designs: Select HARTING 09653626817, 09653627817, TE Connectivity 1757845-3 or 5745436-3, or Amphenol ICC L717/L777 series
For applications with current requirements below 6A: Any active substitute is acceptable
For applications with operating temperatures above 125°C: DBM25P500M is the only substitute supporting -55°C to 155°C range

Frequently Asked Questions (FAQ)

Q: Can DBM25P500M be used as a direct replacement for DBM25P500MN? A: Yes. DBM25P500M is the active equivalent from the same manufacturer with identical electrical ratings (7.5A per contact, 300V), connector configuration (25 positions, 2 rows, shell size 3), and termination method (solder). The primary difference is product status and packaging. Mechanical fit and electrical performance are equivalent.

Q: What is the minimum current rating acceptable for a substitute? A: The original DBM25P500MN is rated for 7.5A per contact. Substitutes with lower current ratings (6.5A, 6A, 5A, or 3A) are acceptable only if the application's actual current draw does not exceed the substitute's rating. Review your circuit requirements before selecting a lower-rated alternative.

Q: Are HARTING alternatives compatible with the original PCB layout? A: HARTING parts 09653626817 and 09653627817 have a backset spacing of 0.409" compared to the original 0.370". This 0.039" difference may require PCB layout modification. Verify mechanical fit with your specific PCB design before committing to production.

Q: What is the difference between L717SDB25P1ACH4R and L777SDB25P1ACH4F? A: Both are Amphenol ICC SD series connectors with identical electrical specifications (3A per contact, 250V, -55°C to 125°C). The primary difference is the flange feature: L717 has board-side (4-40) mounting, while L777 has mating-side female screwlock (4-40). Select based on your mechanical mounting requirements.

Q: Can I use a 3A-rated substitute in an application originally designed for 7.5A? A: No. Using a lower-rated connector in a high-current application creates a safety and reliability risk. The connector will overheat and fail prematurely. Select a substitute with a current rating equal to or greater than your application's actual current draw.

Q: Are all substitutes RoHS compliant? A: No. DBM25P500MN and DBM25P500M are RoHS non-compliant. HARTING parts (09653626817, 09653627817, 09663627817) and TE Connectivity 1757845-3 and 5745436-3 are ROHS3 compliant. Amphenol ICC L717 and L777 series are RoHS compliant. Select based on your regulatory requirements.

Q: What is the operating temperature range for each substitute? A: DBM25P500MN supports -55°C to 155°C. DBM25P500M supports -55°C to 125°C. All other substitutes support -55°C to 125°C except 5745436-3, which is limited to -55°C to 105°C. Verify that the substitute's temperature range encompasses your application's operating environment.

Q: Can I mix different substitute parts in the same assembly? A: Mixing different connector types in a single assembly is not recommended unless they are explicitly designed for interchangeability. Maintain consistency within an assembly to ensure uniform electrical performance and mechanical reliability.

Q: What does "backset spacing" mean and why does it matter? A: Backset spacing is the distance from the rear of the connector shell to the center of the solder pins. Variations in backset spacing (0.318" to 0.454") affect PCB layout and mechanical fit. Verify that your PCB design accommodates the substitute's backset spacing before assembly.

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