DMN55D0UT-7 Equivalent & Substitute Parts

Part Overview

The DMN55D0UT-7 is an N-Channel MOSFET manufactured by Diodes Incorporated, rated for 50V drain-to-source voltage with 160mA continuous drain current at 25°C. The device is housed in a SOT-523 surface mount package and is designed for low-power switching applications requiring compact form factors.

The DMN55D0UT-7 is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing production requirements, field repairs, and design continuity where this part number is specified in existing schematics or bill of materials documentation.

Substiute Parts

DMN55D0UT-7

Diodes IncorporatedIn Stock: 4639DMN55D0UT-7 Datasheet

Current PartRFQ

DMN53D0LT-7

Diodes IncorporatedIn Stock: 33453DMN53D0LT-7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete DMN55D0UT-7 is based on electrical and mechanical parameter compatibility within the N-Channel MOSFET category. The substitute part must satisfy the following criteria:

Mandatory Compatibility Parameters:

• Drain-to-Source Voltage (Vdss) equal to or greater than 50V
• Continuous Drain Current (Id) equal to or greater than 160mA at 25°C
• Package type: SOT-523 surface mount
• Operating temperature range encompassing -55°C to 150°C
• Gate-Source Threshold Voltage (Vgs(th)) compatible with existing gate drive circuits
• On-State Resistance (Rds On) suitable for the application's power dissipation budget

The DMN53D0LT-7 meets all mandatory compatibility parameters and is classified as an active product with enhanced electrical performance characteristics, including higher continuous drain current rating and improved on-state resistance specifications.

Parameter Comparison

Engineering Selection Recommendations

The DMN53D0LT-7 is the qualified substitute for the obsolete DMN55D0UT-7 based on the following engineering criteria:

Electrical Compatibility: The DMN53D0LT-7 maintains the same 50V Vdss rating and exceeds the minimum 160mA continuous drain current requirement with a 350mA rating. The device operates within the same temperature range (-55°C to 150°C) and is housed in the identical SOT-523 surface mount package, ensuring mechanical and thermal compatibility.

Regulatory Compliance: Both parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity classification. These certifications ensure that the substitute part meets the same environmental and regulatory requirements as the original component.

Product Status: The DMN53D0LT-7 is classified as an active product with current manufacturing support and established supply chain availability. This status provides long-term design continuity and eliminates the obsolescence risk associated with the DMN55D0UT-7.

Performance Enhancement: The substitute part provides improved electrical performance, including lower on-state resistance (1.6Ohm versus 4Ohm) and higher power dissipation capability (300mW versus 200mW), offering design margin for existing applications.

Frequently Asked Questions (FAQ)

Q: Can the DMN53D0LT-7 be used as a direct replacement for the DMN55D0UT-7 in existing designs?

A: Yes. The DMN53D0LT-7 is electrically and mechanically compatible with the DMN55D0UT-7. Both devices share identical Vdss (50V), operating temperature range (-55°C to 150°C), and SOT-523 package configuration. The substitute part exceeds the minimum current and power dissipation requirements of the original part.

Q: What are the key differences between these two parts?

A: The primary differences are product status and electrical performance. The DMN55D0UT-7 is obsolete, while the DMN53D0LT-7 is active. The DMN53D0LT-7 provides higher continuous drain current (350mA versus 160mA), lower on-state resistance (1.6Ohm versus 4Ohm at higher current levels), and greater power dissipation capability (300mW versus 200mW). The gate-source threshold voltage is slightly higher (1.5V versus 1V), and the maximum gate-source voltage rating is increased (±20V versus ±12V).

Q: Are there any package or pinout differences between these parts?

A: No. Both the DMN55D0UT-7 and DMN53D0LT-7 use the SOT-523 surface mount package with identical pinout and footprint. No PCB layout modifications are required for substitution.

Q: What is the impact of the higher gate-source threshold voltage on circuit operation?

A: The DMN53D0LT-7 has a gate-source threshold voltage of 1.5V compared to 1V for the DMN55D0UT-7. This 0.5V difference requires slightly higher gate drive voltage to achieve full on-state conduction. Existing gate drive circuits operating at 4V or higher will operate the substitute part within normal parameters. Applications using marginal gate drive voltages below 2V should be evaluated for adequate gate drive margin.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the DMN55D0UT-7 and DMN53D0LT-7 are ROHS3 compliant and REACH unaffected. Both parts carry MSL 1 (unlimited) moisture sensitivity classification, indicating no special moisture control requirements during storage or handling.

Q: What is the significance of the DMN53D0LT-7 being an active product?

A: Active product status indicates that the DMN53D0LT-7 is currently manufactured, supported by the supplier, and available through established distribution channels. This status ensures long-term availability, stable pricing, and technical support, eliminating the obsolescence risk associated with the discontinued DMN55D0UT-7.