PU1DM Equivalent & Substitute Parts

Part Overview

The PU1DM is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V DC reverse voltage and 1 A average rectified current in a Micro SMA surface mount package. This component is classified as a fast recovery diode with a reverse recovery time of 25 ns, suitable for standard rectification applications requiring compact form factors. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across critical parameters, enabling seamless integration into existing designs or providing alternative sourcing options.

Substiute Parts

PU1DM

Taiwan Semiconductor CorporationIn Stock: 12572PU1DM Datasheet

Current PartRFQ

PU1DMH

Taiwan Semiconductor CorporationIn Stock: 6515PU1DMH Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PU1DM is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

• Voltage - DC Reverse (Vr) (Max): 200 V
• Current - Average Rectified (Io): 1 A
• Voltage - Forward (Vf) (Max) @ If: 1.05 V @ 1 A
• Current - Reverse Leakage @ Vr: 1 µA @ 200 V
• Capacitance @ Vr, F: 18 pF @ 4V, 1MHz

Mechanical Parameters (Must Match):

• Package / Case: 2-SMD, Flat Lead
• Supplier Device Package: Micro SMA
• Mounting Type: Surface Mount

Performance Parameters (Allowable Variation):

• Reverse Recovery Time (trr): Variation permitted within fast recovery classification (≤ 500 ns, > 200 mA)
• Operating Temperature Range: Must encompass or equal -55°C to 175°C

Compliance Parameters (Must Match or Exceed):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• Product Status: Active

The PU1DMH qualifies as a parametric equivalent substitute based on full alignment with all electrical, mechanical, and compliance requirements.

Parameter Comparison

Engineering Selection Recommendations

PU1DM (Primary Part): The PU1DM is suitable for standard general-purpose rectification applications. With 12,517 units in stock, this part offers immediate availability. The 25 ns reverse recovery time provides optimal switching performance within the fast recovery classification. Selection of this part is appropriate for applications without automotive qualification requirements.

PU1DMH (Substitute Part): The PU1DMH is qualified to AEC-Q101 automotive standards and carries automotive-grade designation. The 36 ns reverse recovery time remains within the fast recovery specification and maintains full electrical equivalence to the PU1DM. This part is selected when automotive qualification is required or when standard-grade inventory is unavailable. With 6,417 units in stock, this substitute provides an alternative sourcing path while maintaining identical electrical performance and mechanical compatibility.

Both parts maintain Active product status, full RoHS3 compliance, and unlimited moisture sensitivity rating. Selection between these parts is determined by application requirements (automotive versus standard) and inventory availability rather than electrical performance differences.

Frequently Asked Questions (FAQ)

Q: Can PU1DMH be used as a direct replacement for PU1DM in non-automotive applications?

A: Yes. The PU1DMH maintains identical electrical parameters, forward voltage characteristics, reverse leakage current, and capacitance specifications. The automotive qualification (AEC-Q101) is an additional certification that does not restrict use in standard applications. The 36 ns reverse recovery time remains within the fast recovery classification and is electrically equivalent for circuit operation.

Q: What is the significance of the 11 ns difference in reverse recovery time between PU1DM and PU1DMH?

A: Both parts are classified as fast recovery diodes with reverse recovery time ≤ 500 ns for currents > 200 mA. The 25 ns (PU1DM) and 36 ns (PU1DMH) values both satisfy this specification. The difference does not affect functional equivalence in standard rectification circuits. Applications with specific switching frequency or EMI requirements should evaluate both values against circuit simulation parameters.

Q: Are the Micro SMA packages identical between PU1DM and PU1DMH?

A: Yes. Both parts use the 2-SMD, Flat Lead Micro SMA package with identical mechanical dimensions and surface mount compatibility. PCB footprints, reflow profiles, and placement equipment settings are interchangeable.

Q: What is the difference between standard-grade PU1DM and automotive-grade PU1DMH?

A: The PU1DMH carries AEC-Q101 automotive qualification, indicating compliance with automotive industry reliability and testing standards. The PU1DM is standard-grade without automotive certification. Electrical performance is identical. Selection depends on application classification (automotive versus industrial/consumer) and customer qualification requirements.

Q: Can these parts be mixed in the same production batch?

A: Both parts are manufactured by Taiwan Semiconductor Corporation with identical electrical specifications and package compatibility. However, mixing parts with different qualification levels (standard versus automotive-grade) in a single assembly should follow customer quality and traceability procedures. Consult design documentation and procurement specifications for mixing guidelines.

Q: What inventory considerations apply when selecting between PU1DM and PU1DMH?

A: PU1DM has 12,517 units in stock, while PU1DMH has 6,417 units in stock. For applications without automotive requirements, PU1DM offers greater immediate availability. For automotive-qualified designs, PU1DMH is the specified part. Lead time and supply chain planning should account for these inventory levels.

Q: Are there any temperature performance differences between these parts?

A: Both parts operate across the identical junction temperature range of -55°C to 175°C. No performance differentiation exists across the operating temperature spectrum.