DBM25P343 D-Sub Plug 25 Position Equivalent & Substitute Parts

Part Overview

The DBM25P343 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 part is currently active in production with 899 units in stock.

D-Sub connectors of this specification are widely used in industrial, telecommunications, and legacy computing applications where robust signal transmission and mechanical durability are required. Equivalent and substitute parts become necessary when the primary part experiences supply constraints, obsolescence, or when design requirements allow for alternative configurations that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	DBM25P343 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 ~ 125°C
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the DBM25P343 is determined by the following mandatory parameters:

Connector Type: Must be Plug with Male Pins
Position Count: Must be 25 positions
Row Configuration: Must be 2 rows
Shell Size: Must be 3 (DB, B)
Mounting Type: Must be Through Hole
Termination Method: Must be Solder
Contact Finish: Must be Gold
Material Flammability: Must be UL94 V-0
Moisture Sensitivity: Must be MSL 1 (Unlimited)

Substitute parts are grouped into two categories based on flange feature configuration:

Category A - Unthreaded Housing/Shell Flange: Parts with unthreaded shell flanges that maintain the original mounting profile of the DBM25P343.

Category B - Threaded/Locking Flange: Parts with female screwlock (4-40) or board-side locking features that provide enhanced mechanical retention but require compatible mating hardware.

Category C - Panel Mount Configuration: Parts designed for panel mount through-hole applications with alternative flange designs.

Electrical parameters including current rating, voltage rating, and operating temperature range may vary within acceptable limits for the application. Contact material (Brass) and dielectric material composition remain consistent across all qualified substitutes.

Parameter Comparison

Parameter	DBM25P343	1-5745968-3	1-5745968-4	1-5745968-5	1-5745968-6	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	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
Positions	25	25	25	25	25	25	25	25	25
Rows	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)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	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	Not Specified	Not Specified	Not Specified
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Current Rating (Amps)	7.5A per Contact	6A	6A	6A	6A	6A	6A	6A	6A
Voltage Rating	300V	125V	125V	125V	125V	125V	125V	125V	125V
Operating Temperature	-55°C ~ 125°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 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
Contact Material	Brass	Brass	Brass	Brass	Brass	Brass	Brass	Brass	Brass
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	Not applicable	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Electrical Derating Consideration: The DBM25P343 specifies 7.5A per contact and 300V rating. All listed substitute parts operate at 6A per contact and 125V rating. Applications requiring the full 7.5A or 300V specification cannot use these substitutes without circuit redesign or parallel contact configuration.

Temperature Range Limitation: The DBM25P343 operates to 125°C maximum. All substitute parts are rated to 105°C maximum. Applications requiring operation above 105°C require the original part or alternative sourcing.

RoHS Compliance: The DBM25P343 is RoHS non-compliant due to yellow cadmium plating. All substitute parts from TE Connectivity (1-5745968 series, 2-5747704-0, 5208008 series) are ROHS3 compliant. This is a critical consideration for new product designs subject to RoHS regulations.

Flange Feature Compatibility:

Unthreaded Housing Flange (208008-2, 5208008-1, 5208008-2): Direct mechanical replacement for applications using unthreaded shell mounting.
Female Screwlock Flange (1-5745968-3, 1-5745968-4, 1-5745968-5, 1-5745968-6): Require mating connectors with 4-40 screwlock capability. Provide enhanced mechanical retention.
Board Lock Feature (2-5747704-0): Includes board-side locking mechanism for improved retention on PCB applications.

Inventory Availability: TE Connectivity AMPLIMITE HD-20 series parts (1-5745968-3 through 1-5745968-6, 2-5747704-0, 208008-2, 5208008-1, 5208008-2) maintain higher stock levels (942 to 3224 units) compared to the DBM25P343 (899 units), providing supply chain advantages.

Dielectric Material Variation: The DBM25P343 uses Thermoplastic dielectric. Substitute parts use Polyester or Polyamide (PA6T) dielectric materials. These materials maintain UL94 V-0 flammability rating and are functionally equivalent for signal applications.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower current rating (6A vs. 7.5A)?

A: Only if your circuit design operates below 6A per contact. The 6A rating is the maximum safe continuous current for substitute parts. Exceeding this rating creates thermal and reliability risks.

Q: What is the difference between unthreaded and screwlock flange versions?

A: Unthreaded flanges (208008-2, 5208008-1, 5208008-2) mount directly to PCB or panel without fasteners. Screwlock flanges (1-5745968 series) require mating connectors with 4-40 threaded inserts for mechanical locking, providing superior retention in high-vibration environments.

Q: Are the substitute parts mechanically interchangeable with the DBM25P343?

A: Yes, for pin count, row configuration, and shell size. However, flange design differences require verification of mounting hardware compatibility. Unthreaded versions are direct mechanical replacements. Screwlock and board-lock versions require compatible mating hardware.

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

A: These are design specifications set by each manufacturer. The DBM25P343 is rated for 300V and -55°C to 125°C operation. TE Connectivity AMPLIMITE HD-20 series is rated for 125V and -55°C to 105°C. Application requirements must fall within the substitute part's ratings.

Q: Is the yellow cadmium plating on the DBM25P343 critical for my application?

A: Yellow cadmium plating provides corrosion resistance in harsh environments. Tin-plated substitutes offer adequate corrosion protection for most industrial applications. If harsh environment ingress protection is specified, verify the substitute part's environmental rating.

Q: Can I mix DBM25P343 and substitute parts in the same assembly?

A: Yes, provided all parts meet the circuit's electrical requirements (current, voltage, temperature). However, maintaining consistent connector types and manufacturers within a single assembly simplifies maintenance and reduces compatibility issues.

Q: What does ROHS3 compliance mean for my design?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. This is mandatory for products sold in the European Union and increasingly required globally. The DBM25P343 is non-compliant; substitutes are compliant.

Q: Are there any packaging differences between the DBM25P343 and substitutes?

A: Yes. The DBM25P343 is packaged in Trays. Most TE Connectivity substitutes are packaged in Tubes. Verify packaging compatibility with your assembly process and inventory management systems.

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