DBML25P300 D-Sub Plug 25 Position Connector - Equivalent & Substitute Parts

Part Overview

The DBML25P300 is a 25-position D-Sub plug connector manufactured by Amphenol ICC (FCI) in the DM HE501 series. This through-hole solder-terminated connector features male pins with a 3 (DB, B) shell size and board-side M3 flange. The part is currently active in production with 1120 units in stock.

Substitute parts are necessary when the original DBML25P300 becomes unavailable, when alternative compliance certifications are required, or when design modifications necessitate different flange configurations or shell finishes.

Key Parameters

Parameter	DBML25P300 Specification
Connector Type	D-Sub 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
Voltage Rating	300V
Operating Temperature Range	-55°C to 125°C
Material Flammability Rating	UL94 V-0
Contact Material	Brass
Dielectric Material	Thermoplastic
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the DBML25P300 is determined by the following critical parameters:

Core Compatibility Requirements:

Connector type: D-Sub Plug with Male Pins
Position count: 25 positions
Row configuration: 2 rows
Shell size and layout: 3 (DB, B)
Mounting method: Through Hole
Termination method: Solder
Contact material: Brass
Contact finish: Gold
Flammability rating: UL94 V-0

Allowable Variations:

Shell material finish (Yellow Cadmium Plated, Tin Plated, Nickel Plated)
Flange feature configuration (Board Side, Mating Side, Housing/Shell)
Current rating (may be lower than 7.5A)
Voltage rating (may be lower than 300V)
Operating temperature range (may be narrower than -55°C to 125°C)
Dielectric material composition (Thermoplastic, Polyester, Polybutylene Terephthalate, Polyamide)
RoHS compliance status
Packaging format (Tray or Tube)

Substitute parts must maintain identical connector geometry, pin configuration, and solder termination compatibility. Differences in flange design, shell finish, and compliance certifications do not affect electrical or mechanical interchangeability in standard applications.

Parameter Comparison

Parameter	DBML25P300	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	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	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
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	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 Range	-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
Packaging	Tray	Tube	Tube	Tube	Tube	Tray	Tray	Tube	Tube	Tube	Tube

Engineering Selection Recommendations

Primary Substitutes (TE Connectivity AMPLIMITE HD-20 Series):

The TE Connectivity parts 1-5745968-3, 1-5745968-4, 1-5745968-5, 1-5745968-6, 2-5747704-0, 208008-2, 5208008-1, and 5208008-2 are electrically and mechanically compatible with the DBML25P300. All maintain identical connector geometry, 25-position configuration, and solder termination. These parts are active in production with ROHS3 compliance certifications. Current rating is reduced to 6A, and voltage rating is reduced to 125V compared to the original specification. Operating temperature range is narrowed to -55°C to 105°C. These differences are acceptable for applications not requiring the full 7.5A current capacity or 300V voltage rating of the original part.

Secondary Substitutes (NorComp M Series):

The NorComp parts 172-025-112R001 and 172-E25-113R911 provide mechanical and electrical compatibility. Part 172-025-112R001 is obsolete but remains available in inventory. Part 172-E25-113R911 is active in production with ROHS3 compliance. Both feature panel mount capability in addition to through-hole mounting. Current rating is 5A and operating temperature range is -50°C to 100°C. These parts are suitable for applications with lower current requirements and narrower temperature operating windows.

Compliance Considerations:

The original DBML25P300 is RoHS non-compliant. Most substitute parts are ROHS3 compliant, making them preferable for applications subject to RoHS regulations. Part 208008-2 has not applicable RoHS status. Selection should align with regulatory requirements of the target application.

Flange Configuration:

The DBML25P300 features a board-side M3 flange. Substitute parts offer varied flange configurations including mating-side female screwlock (4-40), housing/shell unthreaded, and board-side (4-40) options. Flange selection depends on mechanical mounting requirements and should be verified against PCB layout specifications.

Frequently Asked Questions (FAQ)

Q: Can I directly replace DBML25P300 with any of the listed substitute parts?

A: Yes, all listed substitute parts are mechanically and electrically compatible for standard D-Sub 25-position applications. However, verify that your application does not require the original part's 7.5A current rating or 300V voltage rating, as most substitutes are rated for 6A or 5A at 125V maximum. Additionally, confirm that the flange configuration of the substitute part matches your PCB mounting requirements.

Q: What is the difference between the TE Connectivity AMPLIMITE HD-20 variants (1-5745968-3 through 1-5745968-6)?

A: These four parts are electrically and mechanically identical. The differences are in flange feature configuration and REACH compliance status. Part 1-5745968-3 has REACH Unaffected status. Parts 1-5745968-4 and 1-5745968-5 have different REACH designations (Vendor Undefined and REACH Unaffected respectively). Part 1-5745968-6 has REACH Unaffected status. Select based on your supply chain compliance requirements.

Q: Why is the NorComp 172-025-112R001 marked as obsolete?

A: The part is no longer in active production but remains available in inventory (2444 units). For new designs, the active NorComp alternative 172-E25-113R911 is recommended. However, 172-025-112R001 remains a valid substitute for existing applications requiring panel mount capability.

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

A: Contact finish thickness affects long-term reliability and wear resistance. The DBML25P300 does not specify thickness. Most substitutes use flash gold plating. Part 208008-2 specifies 30.0µin (0.76µm) thickness. Flash plating is typically 0.2 to 0.5µm and is suitable for standard applications. Thicker plating (0.76µm) provides enhanced durability for high-cycle mating applications.

Q: Are there packaging differences between substitute parts?

A: Yes. The DBML25P300 is supplied in Tray packaging. Most TE Connectivity substitutes are supplied in Tube packaging. NorComp parts are supplied in Tray packaging. Packaging format does not affect electrical or mechanical performance but may impact inventory handling and component placement automation compatibility.

Q: Which substitute part has the best compliance certifications?

A: Parts 1-5745968-3, 1-5745968-5, 1-5745968-6, 2-5747704-0, 172-025-112R001, 172-E25-113R911, 5208008-1, and 5208008-2 all carry ROHS3 compliance with REACH Unaffected or REACH Compliant status. These are suitable for applications with strict regulatory requirements. Part 208008-2 has not applicable RoHS status and should be avoided for RoHS-regulated applications.

Q: Can I use a substitute part with a lower current rating in my application?

A: Only if your application's actual current draw does not exceed the substitute part's rating. The DBML25P300 is rated for 7.5A. Most substitutes are rated for 6A or 5A. Verify your circuit's maximum current requirement before selecting a lower-rated substitute. Exceeding the rated current will cause connector overheating and potential failure.

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