DBMS25P300 D-Sub Plug 25 Position Connector - Equivalent & Substitute Parts

Part Overview

The DBMS25P300 is a 25-position D-Sub plug connector manufactured by Amphenol ICC (FCI) in the DM HE501 series. This through-hole solder termination connector features male pins with a 2-row configuration in shell size 3 (DB, B) layout. The connector is rated for 7.5A per contact at 300V and operates across -55°C to 125°C. Currently active in production with 675 units in stock, this connector serves as a standard interface component in industrial and telecommunications applications. Equivalent and substitute parts are necessary when the original part becomes unavailable, when alternative compliance certifications are required, or when design modifications necessitate different flange configurations or material specifications.

Key Parameters

Parameter	DBMS25P300 Specification
Connector Type	Plug, Male Pins
Number of Positions	25
Number of Rows	2
Shell Size, Connector Layout	3 (DB, B)
Mounting Type	Through Hole
Termination	Solder
Shell Material, Finish	Steel, Yellow Cadmium Plated
Contact Finish	Gold
Current Rating	7.5A per Contact
Voltage Rating	300V
Operating Temperature	-55°C to 125°C
Material Flammability Rating	UL94 V-0
Contact Material	Brass
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the DBMS25P300 is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

Connector Type: Plug, Male Pins
Number of Positions: 25
Number of Rows: 2
Shell Size, Connector Layout: 3 (DB, B)
Mounting Type: Through Hole
Termination: Solder
Material Flammability Rating: UL94 V-0
Contact Material: Brass
Contact Finish: Gold

Allowable Variations:

Shell Material and Finish: Substitutes may use alternative plating finishes (tin, nickel) in place of yellow cadmium
Flange Feature: Substitutes may feature different flange configurations (board side, mating side screwlock, housing/shell variations)
Current Rating: Substitutes rated at 6A or 5A are acceptable for applications not requiring the full 7.5A capacity
Voltage Rating: Substitutes rated at 125V are acceptable for applications not requiring the full 300V capacity
Operating Temperature: Substitutes with -55°C to 105°C or -50°C to 100°C ranges are acceptable for applications within these limits
Dielectric Material: Substitutes may use polyester, polybutylene terephthalate (PBT), or polyamide (PA6T/Nylon 6T)
RoHS Compliance: Substitutes with ROHS3 compliance are acceptable as alternatives to non-compliant originals

The substitute parts listed below meet these criteria and are electrically and mechanically compatible with the DBMS25P300 for standard D-Sub 25-position plug applications.

Parameter Comparison

Parameter	DBMS25P300	1-5745968-3	1-5745968-4	1-5745968-5	1-5745968-6	172-025-112R001	172-E25-113R911	2-5747704-0	208008-2	5208008-1	5208008-2
Manufacturer	Amphenol ICC (FCI)	TE Connectivity AMP	TE Connectivity AMP	TE Connectivity AMP	TE Connectivity AMP	NorComp Inc.	NorComp Inc.	TE Connectivity AMP	TE Connectivity AMP	TE Connectivity AMP	TE Connectivity AMP
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	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Panel Mount, Through Hole	Panel Mount, Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Shell Material, Finish	Steel, Yellow Cadmium Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Nickel Plated	Steel, Tin Plated	Not specified	Not specified	Not specified
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Contact Finish Thickness	Not specified	Flash	Flash	Flash	Flash	Flash	Flash	Not specified	30.0µin (0.76µm)	Flash	Flash
Current Rating (Amps)	7.5A per Contact	6A	6A	6A	6A	5A	5A	6A	6A	6A	6A
Voltage Rating	300V	125V	125V	125V	125V	Not specified	Not specified	125V	125V	125V	125V
Operating Temperature	-55°C to 125°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-50°C to 100°C	-50°C to 100°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C
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
Contact Material	Brass	Brass	Brass	Brass	Brass	Brass	Brass	Brass	Brass	Brass	Brass
Dielectric Material	Thermoplastic	Polyester	Polyester	Polyester	Polyester	Polybutylene Terephthalate (PBT), Polyester	Polyamide (PA6T), Nylon 6T	Polyester	Polyester	Polyester	Polyester
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not applicable	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable	Not Applicable	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Obsolete	Active	Active	Active	Active	Active
Inventory (Pcs)	675	1442	3136	1823	1532	2444	986	3224	942	1523	1523

Engineering Selection Recommendations

For RoHS3 Compliance Requirements: Select from TE Connectivity AMPLIMITE HD-20 series (1-5745968-3, 1-5745968-4, 1-5745968-5, 1-5745968-6, 2-5747704-0, 5208008-1, 5208008-2) or NorComp 172 series (172-025-112R001, 172-E25-113R911). All are ROHS3 compliant and suitable for applications requiring modern environmental standards.

For Applications Requiring 300V Rating: The DBMS25P300 is the only part in this group rated for 300V. No substitute parts meet this voltage specification. Applications requiring 300V operation must retain the original DBMS25P300.

For Applications Operating at 7.5A per Contact: The DBMS25P300 is the only part rated for 7.5A per contact. Substitute parts are rated at 6A or 5A. Applications requiring 7.5A per contact must retain the original DBMS25P300.

For Standard 125V, 6A Applications: TE Connectivity AMPLIMITE HD-20 series parts (1-5745968-3 through 1-5745968-6, 2-5747704-0, 208008-2, 5208008-1, 5208008-2) are direct functional equivalents. These parts offer superior inventory availability and ROHS3 compliance. Select based on flange feature requirements and packaging preference (tube vs. tray).

For Panel Mount Applications: NorComp 172 series (172-025-112R001, 172-E25-113R911) feature panel mount through-hole configurations. 172-E25-113R911 is active and offers board lock and grounding indent features. 172-025-112R001 is obsolete and should be avoided for new designs.

For Temperature Range -50°C to 100°C: NorComp 172 series parts operate within -50°C to 100°C. TE Connectivity AMPLIMITE HD-20 series extends to -55°C to 105°C, providing wider temperature coverage.

For Flange Feature Variations:

Board side flange: 172-E25-113R911
Mating side female screwlock (4-40): 1-5745968-3, 1-5745968-4, 1-5745968-5, 1-5745968-6
Housing/shell unthreaded: 208008-2, 5208008-1, 5208008-2
Housing/shell (4-40): 2-5747704-0

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part rated at 6A instead of the original 7.5A rated connector?

A: Substitution is only valid if your application current requirement does not exceed 6A. If your circuit draws more than 6A per contact, the original DBMS25P300 must be used. Verify actual circuit current requirements before substitution.

Q: Are the TE Connectivity AMPLIMITE HD-20 series parts electrically compatible with the DBMS25P300?

A: Yes, for applications operating at 125V or less and 6A or less per contact. Both feature 25-position, 2-row D-Sub plugs with male pins, identical shell size 3 (DB, B) layout, solder termination, brass contacts with gold finish, and UL94 V-0 flammability rating. Differences in shell plating (tin vs. yellow cadmium) and operating temperature range (-55°C to 105°C vs. -55°C to 125°C) do not affect electrical compatibility for standard applications.

Q: What is the difference between the various TE Connectivity part numbers (1-5745968-3, 1-5745968-4, 1-5745968-5, 1-5745968-6)?

A: These parts are electrically identical 25-position D-Sub plugs in the AMPLIMITE HD-20 series. Differences exist in RoHS and REACH compliance documentation status. 1-5745968-3 and 1-5745968-5 list REACH Unaffected status, while 1-5745968-4 and 1-5745968-6 show Vendor Undefined or REACH Unaffected. All are ROHS3 compliant. Select based on your compliance documentation requirements.

Q: Why do some substitute parts have lower current and voltage ratings?

A: The DBMS25P300 is specified for 7.5A per contact at 300V, representing a higher-performance variant. Most substitute parts are rated for 6A at 125V, which is typical for standard D-Sub 25-position connectors. Substitutes are valid only for applications not requiring the higher ratings. Verify your application requirements before substitution.

Q: Can I substitute a panel mount connector (NorComp 172 series) for a through-hole connector (DBMS25P300)?

A: No. Panel mount and through-hole connectors have different mechanical mounting interfaces. NorComp 172-025-112R001 and 172-E25-113R911 feature panel mount configurations and cannot be directly substituted for through-hole applications without redesigning the PCB mounting pattern.

Q: What is the significance of the flange feature differences?

A: Flange features determine mechanical mounting and locking mechanisms. Board side flanges (172-E25-113R911) provide board-level locking. Mating side female screwlock flanges (1-5745968-3 through 1-5745968-6) enable threaded mating connections. Housing/shell flanges (208008-2, 5208008-1, 5208008-2, 2-5747704-0) provide different mounting options. Select based on your mechanical interface requirements.

Q: Is the NorComp 172-025-112R001 suitable for new designs?

A: No. This part is marked as obsolete. While 2444 units are currently in stock, NorComp has discontinued this product. For new designs, select from active products: TE Connectivity AMPLIMITE HD-20 series or NorComp 172-E25-113R911.

Q: What packaging options are available?

A: Amphenol ICC DBMS25P300 is supplied in trays. TE Connectivity AMPLIMITE HD-20 series parts are supplied in tubes. NorComp 172 series parts are supplied in trays. Verify packaging compatibility with your assembly process before ordering.

Q: Do all substitute parts meet UL94 V-0 flammability requirements?

A: Yes. All substitute parts listed are rated UL94 V-0, matching the original DBMS25P300 specification.

Q: Can I mix substitute parts from different manufacturers in the same assembly?

A: Yes, provided all parts meet your application's electrical and mechanical requirements. However, maintaining consistency with a single manufacturer and series is recommended for supply chain stability and long-term availability.

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