DBML25S300 D-Sub 25 Position Receptacle Equivalent & Substitute Parts

Part Overview

The DBML25S300 is a 25 position D-Sub receptacle connector manufactured by Amphenol ICC (FCI) in the DM HE501 series. This through-hole solder termination connector features female sockets with a DB/B shell size (3) and is designed for signal applications requiring 7.5A per contact at 300V. The part is currently active in production with 819 units in stock.

Equivalent and substitute parts are necessary when the original DBML25S300 becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design requirements permit substitution based on compatible electrical and mechanical parameters.

Key Parameters

Parameter	DBML25S300 Specification
Connector Type	D-Sub Receptacle, Female Sockets
Number of Positions	25
Shell Size / Layout	3 (DB, B)
Mounting Type	Through Hole
Termination	Solder
Current Rating	7.5A per Contact
Voltage Rating	300V
Operating Temperature	-55°C to 125°C
Contact Material	Phosphor Bronze
Contact Finish	Gold
Shell Material / Finish	Steel, Yellow Cadmium Plated
Flammability Rating	UL94 V-0
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the DBML25S300 is determined by strict equivalence in the following parameters:

Critical Parameters (Must Match):

Connector type: D-Sub receptacle, female sockets
Number of positions: 25
Shell size and layout: 3 (DB, B)
Mounting type: Through hole
Termination method: Solder
Contact material: Phosphor bronze
Contact finish: Gold
Flammability rating: UL94 V-0
Moisture sensitivity level: 1 (Unlimited)

Allowable Variations:

Current rating: DBML25S300 rated at 7.5A; substitute parts rated at 6A are acceptable for applications not requiring the full 7.5A specification
Voltage rating: DBML25S300 rated at 300V; substitute parts rated at 125V are acceptable for applications operating below 125V
Operating temperature: DBML25S300 rated -55°C to 125°C; substitute parts rated -55°C to 105°C are acceptable for applications within the lower range
Shell finish: Yellow cadmium plated (main part) vs. tin plated (substitutes) are both acceptable finishes
Flange feature: Board side M3 (main part) vs. housing/shell variants (substitutes) accommodate different mounting configurations
Packaging format: Tray, tube, or bulk packaging are interchangeable for component procurement
Dielectric material: Thermoplastic or polyester variants are acceptable
RoHS compliance status: Variations permitted based on application requirements

Parameter Comparison

Parameter	DBML25S300	1-338315-2	1-5745967-0	1-5745967-4	1-5745967-5	1-5745967-6	1-745967-4	2-338315-2	2-5747708-0	2-747708-0	207828-3
Manufacturer	Amphenol ICC (FCI)	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity
Series	DM HE501	AMPLIMITE HDP-20	AMPLIMITE HD-20	AMPLIMITE HD-20	AMPLIMITE HD-20	AMPLIMITE HD-20	AMPLIMITE HD-20	AMPLIMITE HDP-20	AMPLIMITE HD-20	AMPLIMITE HD-20	AMPLIMITE HD-20
Connector Type	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets
Number of Positions	25	25	25	25	25	25	25	25	25	25	25
Shell Size / 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	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Current Rating (Amps)	7.5A	6A	6A	6A	6A	6A	6A	6A	6A	6A	6A
Voltage Rating	300V	—	125V	125V	125V	125V	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	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Shell Material / Finish	Steel, Yellow Cadmium Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	Steel, Tin Plated	—
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
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	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	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant
Packaging	Tray	Tray	Tube	Tube	Tube	Tube	Tube	Bulk	Tray	Tube	Tube
Inventory (Pcs)	819	4711	1489	1879	2268	4421	1351	1204	4060	2038	1434

Engineering Selection Recommendations

All listed substitute parts meet the core functional and mechanical requirements for D-Sub 25 position receptacle applications. Selection among substitutes depends on specific application constraints:

For RoHS3 Compliance Requirements: Use 1-338315-2, 1-5745967-6, or 2-338315-2. These parts carry ROHS3 Compliant certification and are suitable for applications subject to RoHS3 regulations.

For RoHS Non-Compliant Applications: Use 1-745967-4, 2-747708-0, or 207828-3. These parts maintain RoHS non-compliant status consistent with the original DBML25S300.

For Standard RoHS Compliance: Use 1-5745967-0, 1-5745967-4, or 1-5745967-5. These parts carry RoHS Compliant certification.

For Packaging Format Flexibility:

Tray packaging: 1-338315-2, 2-5747708-0
Tube packaging: 1-5745967-0, 1-5745967-4, 1-5745967-5, 1-5745967-6, 1-745967-4, 2-747708-0, 207828-3
Bulk packaging: 2-338315-2

For REACH Status Considerations:

REACH Affected: 1-338315-2, 1-5745967-0, 1-5745967-4, 1-745967-4, 2-5747708-0, 2-747708-0, 207828-3
REACH Unaffected: 1-5745967-6
Vendor Undefined: 1-5745967-5, 2-338315-2

For High-Inventory Availability: 1-338315-2 (4711 units), 1-5745967-6 (4421 units), and 2-5747708-0 (4060 units) offer the highest stock levels.

For Applications Requiring 300V Rating: The DBML25S300 operates at 300V. Substitute parts operate at 125V maximum. Use the original DBML25S300 for applications exceeding 125V.

For Applications Requiring 7.5A Per Contact: The DBML25S300 is rated at 7.5A per contact. All substitute parts are rated at 6A per contact. Use the original DBML25S300 for applications requiring the full 7.5A specification.

For Applications Requiring 125°C Upper Temperature Limit: The DBML25S300 operates to 125°C. All substitute parts operate to 105°C maximum. Use the original DBML25S300 for applications requiring operation above 105°C.

Frequently Asked Questions (FAQ)

Q: Can I substitute a 6A-rated connector for the 7.5A DBML25S300?

A: Substitution is permissible only if your application current requirements do not exceed 6A per contact. The 6A rating of substitute parts represents a lower current capacity than the original 7.5A specification. Verify actual circuit current draw before substitution.

Q: What is the difference between the AMPLIMITE HDP-20 and AMPLIMITE HD-20 series?

A: Both series are D-Sub 25 position receptacles with identical mechanical and electrical core specifications. The HDP-20 series (1-338315-2, 2-338315-2) includes board lock features. The HD-20 series provides variants with different flange configurations and contact finish thicknesses. Series selection depends on mounting and locking requirements.

Q: Can I use a 125V-rated substitute in a 300V application?

A: No. The DBML25S300 is rated for 300V operation. Substitute parts rated at 125V maximum are not suitable for applications exceeding 125V. Use the original DBML25S300 for high-voltage applications.

Q: Are tin-plated and cadmium-plated shells functionally equivalent?

A: Both finishes provide corrosion protection and electrical conductivity. Tin plating (substitute parts) and yellow cadmium plating (DBML25S300) are both acceptable shell finishes. Selection may depend on environmental exposure, cost considerations, or specific application requirements. Cadmium plating is restricted in some jurisdictions under RoHS regulations.

Q: What is the difference between board-side and housing-side flange features?

A: Board-side flanges (M3 threaded) mount directly to the PCB with threaded fasteners. Housing-side flanges (4-40 threaded or unthreaded) mount to an external enclosure or backshell. Select based on your mechanical mounting configuration.

Q: Can I mix packaging formats in production?

A: Yes. Tray, tube, and bulk packaging formats contain identical components. Packaging format selection depends on manufacturing process requirements, handling procedures, and inventory management practices. All formats are electrically and mechanically equivalent.

Q: What does "Moisture Sensitivity Level 1 (Unlimited)" mean?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. No baking or desiccant storage is required before soldering.

Q: Are there differences in dielectric material between substitutes?

A: Yes. The DBML25S300 uses thermoplastic dielectric. Substitute parts use either thermoplastic or polyester (glass-filled or unfilled) dielectrics. All materials meet UL94 V-0 flammability requirements. Material selection does not affect electrical performance for standard D-Sub applications.

Q: What does "Contact Finish Thickness: Flash" mean?

A: Flash gold plating indicates a very thin gold coating applied to the contact surface. This is acceptable for standard signal applications and provides corrosion protection equivalent to thicker gold plating (30.0µin / 0.76µm) in most D-Sub connector applications.

Q: Which substitute offers the best RoHS compliance status?

A: Parts with ROHS3 Compliant certification (1-338315-2, 1-5745967-6, 2-338315-2) meet the most current RoHS3 requirements. These are recommended for new designs subject to RoHS3 regulations.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message