US2M Diode Equivalent & Substitute Parts

Part Overview

The US2M is a fast recovery rectifier diode manufactured by Diotec Semiconductor, rated for 1000 V DC reverse voltage and 2 A average rectified current in a surface mount DO-214AA (SMB) package. This component is classified as Active product status and is currently in stock with 29,100 units available.

The US2M serves as a general-purpose rectification diode for applications requiring fast recovery characteristics and high voltage blocking capability. Substitute parts become necessary when the primary part reaches end-of-life status, experiences supply constraints, or when design requirements permit operation with alternative electrical specifications within the same package form factor.

Substiute Parts

US2M

Diotec SemiconductorIn Stock: 29155US2M Datasheet

Current PartRFQ

HS3MB R5G

Taiwan Semiconductor CorporationIn Stock: 1493HS3MB R5G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the US2M rectifier diode is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 1000 V
• Package / Case: Must be DO-214AA (SMB) surface mount form factor
• Speed Classification: Must be Fast Recovery with trr ≤ 500 ns
• Mounting Type: Must be Surface Mount

Allowable Variation Parameters:

• Current - Average Rectified (Io): Substitute parts may exceed 2 A rating
• Voltage - Forward (Vf) (Max): Minor variations acceptable within fast recovery diode specifications
• Current - Reverse Leakage: Substitute parts may have lower leakage current
• Operating Temperature Range: Substitute parts may have extended temperature range

The HS3MB R5G from Taiwan Semiconductor Corporation qualifies as a substitute part. It maintains identical reverse voltage rating (1000 V), identical package form factor (DO-214AA/SMB), identical fast recovery speed classification (trr = 75 ns), and identical mounting type (Surface Mount). The HS3MB R5G provides higher current rating (3 A versus 2 A), which is acceptable for substitution in applications designed for the US2M.

Parameter Comparison

Engineering Selection Recommendations

US2M (Diotec Semiconductor): The US2M maintains Active product status with substantial inventory availability (29,100 units). This part is the primary selection for new designs and applications where supply continuity is required. RoHS compliance status is not applicable for this component.

HS3MB R5G (Taiwan Semiconductor Corporation): The HS3MB R5G is classified as Discontinued at DiGi Electronics, indicating limited future availability. This part carries ROHS3 compliance certification and REACH Unaffected status, providing regulatory advantages in applications subject to environmental compliance requirements. The higher current rating (3 A) and extended lower operating temperature limit (-55°C versus -50°C) provide design margin in thermally constrained or high-current applications. Inventory is limited to 1,461 units.

Selection between these parts depends on application requirements for regulatory compliance, thermal performance, and current capacity. The US2M is recommended for standard applications with assured long-term supply. The HS3MB R5G is suitable for applications requiring ROHS3 compliance or extended low-temperature operation, subject to inventory availability constraints.

Frequently Asked Questions (FAQ)

Q: Can the HS3MB R5G directly replace the US2M in existing circuit designs?

A: Yes. Both diodes share identical reverse voltage rating (1000 V), package form factor (DO-214AA/SMB), fast recovery speed classification (75 ns trr), and forward voltage characteristics (1.7 V). The HS3MB R5G higher current rating (3 A) is compatible with circuits designed for 2 A operation. PCB layout and thermal management remain unchanged.

Q: What is the significance of the higher current rating on the HS3MB R5G?

A: The HS3MB R5G 3 A rating exceeds the US2M 2 A specification. In substitution, a higher current rating does not create incompatibility. The substitute part operates safely within the original circuit's current demands. This provides additional thermal margin and component reliability in applications operating near the 2 A limit.

Q: How does the reverse leakage current difference affect circuit performance?

A: The HS3MB R5G exhibits 10 µA reverse leakage at 1000 V compared to 5 µA for the US2M. This difference is negligible in most rectification applications. Leakage current becomes significant only in precision analog circuits or high-impedance applications. Standard power supply and switching applications are unaffected by this parameter variation.

Q: Are there package or mounting differences between these diodes?

A: No. Both the US2M and HS3MB R5G use identical DO-214AA (SMB) surface mount package specifications. PCB footprints, reflow soldering profiles, and automated assembly processes remain identical. No design or manufacturing modifications are required for substitution.

Q: What is the impact of the extended operating temperature range on the HS3MB R5G?

A: The HS3MB R5G operates from -55°C to 150°C compared to the US2M range of -50°C to 150°C. The extended lower temperature limit provides 5°C additional margin in cold-environment applications. This specification difference does not affect circuits operating within the US2M temperature range.

Q: Why is the HS3MB R5G listed as discontinued?

A: Discontinued status indicates the part is no longer in active production and future availability through distribution channels is limited. Current inventory (1,461 units) represents remaining stock. For applications requiring long-term supply assurance, the Active-status US2M is the appropriate selection.

Q: Does ROHS3 compliance on the HS3MB R5G provide advantages over the US2M?

A: ROHS3 compliance certification on the HS3MB R5G is relevant for applications subject to European Union Restriction of Hazardous Substances regulations or customer-mandated environmental compliance requirements. The US2M RoHS status is listed as Not Applicable, indicating it does not fall under ROHS3 scope. Selection depends on regulatory requirements specific to the application and end market.