DBML25P500M D-Sub Connector Equivalent & Substitute Parts

Part Overview

The DBML25P500M is a 25-position D-Sub plug connector manufactured by Amphenol ICC (FCI) in the DM HE501 series. This right-angle, through-hole solder connector is designed for signal applications requiring robust mechanical and electrical performance in industrial and commercial environments. The part maintains active product status with 1087 units in current inventory. Substitute parts are identified to address supply chain requirements, design flexibility, or specific application constraints while maintaining core functional compatibility.

Substiute Parts

DBML25P500M

Amphenol ICC (FCI)In Stock: 1152DBML25P500M Datasheet

Current PartRFQ

5745436-3

TE Connectivity AMP ConnectorsIn Stock: 9575745436-3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DBML25P500M is determined by strict alignment of the following parameters:

• Connector style (D-Sub) and type (Plug, Male Pins)
• Position count (25) and row configuration (2)
• Shell size and layout (3 / DB, B)
• Mounting method (Through Hole, Right Angle)
• Termination technology (Solder)
• Contact type (Signal)
• Flammability rating (UL94 V-0)

The substitute part 5745436-3 (TE Connectivity AMP Connectors, AMPLIMITE HDP-20 series) satisfies all primary substitution criteria. Variations in secondary parameters such as current rating, voltage rating, backset spacing, shell finish, and operating temperature range are documented in the parameter comparison table and must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitution Criteria Met: The 5745436-3 satisfies all mandatory functional and mechanical parameters for D-Sub 25-position plug connector substitution.

Regulatory Compliance Consideration: The DBML25P500M is RoHS non-compliant, while the 5745436-3 is ROHS3 compliant. Selection between these parts must align with program-specific regulatory requirements. Both parts carry EAR99 ECCN classification and identical HTSUS codes (8536.69.4040).

Electrical Performance Variance: The DBML25P500M provides higher current rating (7.5A vs. 6A per contact) and voltage rating (300V vs. 125V). Applications requiring the higher electrical specifications must use the DBML25P500M.

Mechanical and Material Differences: Backset spacing differs (0.406" vs. 0.454"), requiring verification against PCB layout and mounting bracket specifications. Shell finish differs (yellow cadmium plated vs. tin plated); environmental corrosion exposure must be evaluated. Dielectric materials differ (thermoplastic vs. polyamide glass-filled); thermal cycling and mechanical stress conditions must be assessed.

Temperature Operating Range: The DBML25P500M supports operation to 125°C maximum, while the 5745436-3 is rated to 105°C maximum. Applications exceeding 105°C require the DBML25P500M.

Inventory and Availability: DBML25P500M: 1087 units in stock. 5745436-3: 877 units in stock. Both parts maintain active product status.

Frequently Asked Questions (FAQ)

Q: Can the 5745436-3 be used as a direct replacement for the DBML25P500M in all applications?

A: No. While both connectors share identical D-Sub 25-position plug configuration, shell size, and mounting type, critical differences exist in current rating (6A vs. 7.5A), voltage rating (125V vs. 300V), operating temperature maximum (105°C vs. 125°C), backset spacing (0.454" vs. 0.406"), and RoHS compliance status. Application-specific electrical, thermal, and regulatory requirements must be verified before substitution.

Q: What is the significance of the backset spacing difference between these connectors?

A: Backset spacing (0.406" for DBML25P500M vs. 0.454" for 5745436-3) defines the distance from the connector mounting face to the contact insertion point. This dimension directly affects PCB layout, mounting bracket design, and mating connector alignment. PCB designs must be verified for compatibility with the substitute part's spacing before implementation.

Q: Does the difference in shell finish (yellow cadmium vs. tin plated) affect connector performance?

A: Shell finish affects corrosion resistance and environmental durability. Yellow cadmium plating (DBML25P500M) and tin plating (5745436-3) provide different protection profiles. Applications exposed to salt spray, humidity, or aggressive chemical environments must evaluate finish suitability for the intended operating environment.

Q: Why does the DBML25P500M have RoHS non-compliant status while the 5745436-3 is ROHS3 compliant?

A: RoHS compliance status reflects the presence or absence of restricted substances (lead, cadmium, mercury, etc.) in the component. The yellow cadmium plating on the DBML25P500M contributes to its non-compliant status. Programs with RoHS mandates must use the 5745436-3 or equivalent compliant alternatives.

Q: Can the 5745436-3 be used in applications requiring 300V operation?

A: No. The 5745436-3 is rated for 125V maximum, while the DBML25P500M is rated for 300V. Applications requiring 300V operation must use the DBML25P500M or verify that the 5745436-3 meets the actual voltage requirements of the specific circuit.

Q: What dielectric material difference exists between these connectors?

A: The DBML25P500M uses thermoplastic dielectric material, while the 5745436-3 uses polyamide (PA) nylon with glass filler. Glass-filled polyamide provides enhanced mechanical strength and thermal stability. Applications subject to high mechanical stress or thermal cycling should evaluate material suitability for the operating environment.