UH1DHE3_A/I Equivalent & Substitute Parts

Part Overview

The UH1DHE3_A/I is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode is rated for 200 V DC reverse voltage with 1 A average rectified current in a DO-214AC (SMA) package. The device is classified as Active product status with AEC-Q101 automotive qualification.

Substitute parts are necessary when the primary part becomes unavailable due to supply constraints, inventory depletion, or manufacturing discontinuation. Alternative diodes meeting identical electrical and mechanical specifications ensure design continuity and production scheduling flexibility.

Substiute Parts

UH1DHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1195UH1DHE3_A/I Datasheet

Current PartRFQ

ES1D R3G

Taiwan Semiconductor CorporationIn Stock: 860ES1D R3G Datasheet

MFR RecommendedRFQ

FS1DE-TP

Micro Commercial CoIn Stock: 918FS1DE-TP Datasheet

MFR RecommendedRFQ

RS1D

Taiwan Semiconductor CorporationIn Stock: 20226RS1D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UH1DHE3_A/I is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 200 V
• Current - Average Rectified (Io): 1 A
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Operating Temperature Range: -55°C to 150°C minimum

Acceptable Variation Parameters:

• Voltage - Forward (Vf) (Max) @ If: Substitute parts may exhibit forward voltage up to 1.3 V at 1 A (main part specifies 1.05 V maximum)
• Reverse Recovery Time (trr): Substitute parts may range from 25 ns to 150 ns (main part specifies 25 ns)
• Current - Reverse Leakage @ Vr: Substitute parts may range from 1 µA to 5 µA at 200 V (main part specifies 1 µA)
• Capacitance @ Vr, F: Substitute parts may range from 10 pF to 17 pF at 4 V, 1 MHz (main part specifies 17 pF)

All substitute parts listed maintain compliance with RoHS3 and REACH requirements. Product status variations (Active, Discontinued, Obsolete) are noted for procurement planning purposes.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: RS1D (Taiwan Semiconductor Corporation)

The RS1D is the preferred substitute for the UH1DHE3_A/I. Both devices maintain Active product status, ensuring long-term availability and supply chain stability. The RS1D meets all mandatory electrical specifications with identical voltage and current ratings. Operating temperature range (-55°C to 150°C) matches the main part exactly. RoHS3 compliance and REACH unaffected status align with regulatory requirements. Inventory availability of 20,200 pieces provides superior supply security compared to the main part's 1,126 pieces.

Secondary Substitute: ES1D R3G (Taiwan Semiconductor Corporation)

The ES1D R3G is functionally equivalent across all critical parameters. Forward voltage performance is superior at 950 mV compared to the main part's 1.05 V maximum. Reverse recovery time of 35 ns remains within acceptable fast recovery classification. However, product status is listed as Discontinued at DiGi Electronics, which may impact long-term procurement. Current inventory of 840 pieces is lower than the main part. This substitute is suitable for immediate replacement but not recommended for new long-term designs.

Tertiary Substitute: FS1DE-TP (Micro Commercial Co)

The FS1DE-TP meets voltage and current specifications but exhibits the longest reverse recovery time at 150 ns among available substitutes. Product status is Obsolete, indicating no further manufacturing or support. Operating temperature minimum of -50°C is 5°C higher than the main part specification. This substitute is suitable only for applications where the -50°C to 150°C range is acceptable and immediate availability is critical. Use is not recommended for new designs or long-term production.

Frequently Asked Questions (FAQ)

Q: Can the RS1D directly replace the UH1DHE3_A/I without circuit modification?

A: Yes. The RS1D meets all mandatory electrical specifications: 200 V reverse voltage, 1 A average rectified current, fast recovery speed classification, and identical DO-214AC package. Operating temperature range and RoHS3 compliance are equivalent. Direct substitution is electrically and mechanically compatible.

Q: What is the significance of the reverse recovery time (trr) variation between substitutes?

A: Reverse recovery time affects switching speed and switching losses in rectifier applications. The main part specifies 25 ns, while substitutes range from 35 ns to 150 ns. All values remain within the fast recovery classification (≤ 500 ns). Longer recovery times result in slightly higher switching losses but do not affect DC rectification performance. Selection depends on specific circuit switching frequency requirements.

Q: Why does the ES1D R3G show lower forward voltage than the main part?

A: Forward voltage variation of ±10% is typical across semiconductor manufacturing processes and temperature ranges. The ES1D R3G's 950 mV maximum at 1 A is superior to the main part's 1.05 V, resulting in lower power dissipation. This represents a performance advantage with no compatibility concerns.

Q: Is the FS1DE-TP suitable for automotive applications?

A: The FS1DE-TP does not carry AEC-Q101 automotive qualification in the provided specifications. The main part and RS1D both maintain AEC-Q101 qualification. For automotive applications requiring qualification compliance, the FS1DE-TP is not recommended.

Q: What is the impact of the -50°C minimum operating temperature on the FS1DE-TP?

A: The FS1DE-TP specifies -50°C to 150°C, while the main part specifies -55°C to 150°C. This 5°C difference may be significant for applications operating in extreme cold environments below -50°C. For applications within the -50°C to 150°C range, this variation is not limiting.

Q: Are all substitute parts available in identical packaging formats?

A: All substitute parts use the DO-214AC (SMA) surface mount package. Packaging format variations exist: the main part and RS1D are available in standard tape and reel configurations, ES1D R3G is available in Cut Tape and Digi-Reel format, and FS1DE-TP is available in Tape & Reel format. These packaging differences do not affect electrical compatibility but may influence procurement and handling procedures.

Q: Which substitute offers the best long-term supply security?

A: The RS1D offers the highest inventory availability at 20,200 pieces and maintains Active product status. This combination ensures sustained manufacturing and supply chain continuity. The main part (1,126 pieces) and ES1D R3G (840 pieces) have lower inventory levels. The FS1DE-TP is Obsolete and should not be selected for long-term supply planning.