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SS32HE3/9AT Equivalent & Substitute Parts
Part Overview
The SS32HE3/9AT is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 20 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) surface mount package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design support and procurement continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within the same application category.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Technology | Schottky | — |
| Voltage - DC Reverse (Vr) (Max) | 20 | V |
| Current - Average Rectified (Io) | 3 | A |
| Voltage - Forward (Vf) (Max) @ If | 500 mV @ 3 A | — |
| Speed | Fast Recovery ≤ 500ns, > 200mA (Io) | — |
| Current - Reverse Leakage @ Vr | 500 µA @ 20 V | — |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AB, SMC | — |
| Operating Temperature - Junction | -55 to 125 | °C |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the SS32HE3/9AT is determined by strict equivalence across the following critical parameters:
Primary Equivalence Criteria:
- Voltage - DC Reverse (Vr) (Max): 20 V
- Current - Average Rectified (Io): 3 A
- Voltage - Forward (Vf) (Max) @ If: 500 mV @ 3 A
- Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
- Current - Reverse Leakage @ Vr: 500 µA @ 20 V
- Mounting Type: Surface Mount
- Package / Case: DO-214AB, SMC
- Operating Temperature - Junction: -55°C to 125°C
Parametric Equivalent Parts maintain all primary equivalence criteria and differ only in packaging format (Tape & Reel vs. Cut Tape) or minor manufacturing variants within the same base product series.
Manufacturer Recommended Parts meet all electrical specifications but may originate from different manufacturers. These parts are functionally interchangeable within the application scope.
Upgrade Parts provide the same electrical performance in alternative package formats (e.g., SMA vs. SMC) and are suitable for designs permitting package substitution.
Parameter Comparison
| Part Number | Manufacturer | Vr (Max) [V] | Io [A] | Vf (Max) @ If [mV] | Reverse Leakage @ Vr [µA] | Package | Tj (°C) | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| SS32HE3/9AT | Vishay | 20 | 3 | 500 @ 3A | 500 @ 20V | DO-214AB, SMC | -55 to 125 | Obsolete | ROHS3 Compliant |
| SS32-E3/57T | Vishay | 20 | 3 | 500 @ 3A | 500 @ 20V | DO-214AB, SMC | -55 to 125 | Active | ROHS3 Compliant |
| SS32-E3/9AT | Vishay | 20 | 3 | 500 @ 3A | 500 @ 20V | DO-214AB, SMC | -55 to 125 | Active | ROHS3 Compliant |
| SS32-M3/57T | Vishay | 20 | 3 | 500 @ 3A | 500 @ 20V | DO-214AB, SMC | -55 to 125 | Active | ROHS3 Compliant |
| SS32-M3/9AT | Vishay | 20 | 3 | 500 @ 3A | 500 @ 20V | DO-214AB, SMC | -55 to 125 | Active | ROHS3 Compliant |
| B320-13-F | Diodes Incorporated | 20 | 3 | 500 @ 3A | 500 @ 20V | DO-214AB, SMC | -55 to 125 | Active | ROHS3 Compliant |
| CD214C-B320R | Bourns Inc. | 20 | 3 | 500 @ 3A | 500 @ 20V | DO-214AB, SMC | -55 to 125 | Active | ROHS3 Compliant |
| SK32_R1_00001 | Panjit International Inc. | 20 | 3 | 500 @ 3A | 200 @ 20V | DO-214AB, SMC | -55 to 125 | Active | ROHS3 Compliant |
| MBRS320T3G | onsemi | 20 | 3 | 500 @ 3A | 2000 @ 20V | DO-214AB, SMC | -65 to 150 | Active | ROHS3 Compliant |
| 5820SMJ/TR13 | Microchip Technology | 20 | 3 | 460 @ 3A | 1500 @ 20V | DO-214AB | -55 to 150 | Active | RoHS non-compliant |
| SS32 | MDD | 20 | 3 | — | 500 @ 20V | DO-214AC, SMA | -55 to 125 | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Preferred Parametric Equivalents (Active Status, Identical Specifications):
The Vishay SS32-E3/9AT, SS32-E3/57T, SS32-M3/9AT, and SS32-M3/57T represent direct parametric equivalents with identical electrical and thermal characteristics. These parts are manufactured by the original supplier and maintain full ROHS3 compliance. Selection among these variants depends on packaging format requirements: Tape & Reel (TR) for automated assembly or Cut Tape (CT) for manual handling.
Cross-Manufacturer Equivalents (Active Status, Matched Specifications):
The Diodes Incorporated B320-13-F, Bourns Inc. CD214C-B320R, and Panjit International Inc. SK32_R1_00001 provide full parametric equivalence with identical reverse voltage, forward voltage, and current ratings. All three maintain ROHS3 compliance and -55°C to 125°C operating temperature range. The SK32_R1_00001 exhibits lower reverse leakage current (200 µA vs. 500 µA), which may provide performance advantages in low-leakage applications.
Alternative Manufacturers with Specification Variations:
The onsemi MBRS320T3G meets core electrical requirements but exhibits higher reverse leakage current (2 mA) and extended operating temperature range (-65°C to 150°C). This part is suitable for applications requiring enhanced thermal performance.
The Microchip Technology 5820SMJ/TR13 provides equivalent voltage and current ratings with improved forward voltage (460 mV vs. 500 mV) but carries RoHS non-compliance status and higher reverse leakage current (1.5 mA). This part is not recommended for new designs requiring RoHS compliance.
Package Variant (Upgrade Option):
The MDD SS32 provides identical electrical specifications in a DO-214AC (SMA) package format. This option is suitable only for designs permitting package substitution and requiring the larger SMA footprint.
Frequently Asked Questions (FAQ)
Q: Can I directly replace SS32HE3/9AT with SS32-E3/9AT?
A: Yes. The SS32-E3/9AT is a parametric equivalent with identical electrical specifications, reverse voltage (20 V), forward voltage (500 mV @ 3 A), and operating temperature range (-55°C to 125°C). The primary difference is product status: SS32-E3/9AT is active while SS32HE3/9AT is obsolete. Both are packaged in DO-214AB (SMC) and are ROHS3 compliant.
Q: What is the difference between SS32-E3/9AT and SS32-M3/9AT?
A: Both parts are parametric equivalents with identical electrical specifications. The difference lies in packaging format: SS32-E3/9AT is supplied in Tape & Reel (TR) format, while SS32-M3/9AT is also supplied in Tape & Reel (TR) format. Both are active products from Vishay with ROHS3 compliance.
Q: Can I use B320-13-F as a substitute for SS32HE3/9AT?
A: Yes. The B320-13-F from Diodes Incorporated meets all electrical specifications: 20 V reverse voltage, 3 A current rating, 500 mV forward voltage @ 3 A, and identical operating temperature range (-55°C to 125°C). Both are packaged in DO-214AB (SMC) and are ROHS3 compliant. The B320-13-F is an active product with higher inventory availability.
Q: Why is the MBRS320T3G listed as an alternative if it has higher reverse leakage current?
A: The MBRS320T3G maintains the core electrical specifications (20 V, 3 A) and fast recovery speed required for the application. The higher reverse leakage current (2 mA vs. 500 µA) is a specification variation that may be acceptable depending on circuit design requirements. This part offers extended operating temperature range (-65°C to 150°C) and is suitable for thermal-demanding applications. Circuit validation is necessary to confirm acceptability of the leakage current specification.
Q: Is the Microchip 5820SMJ/TR13 suitable for new designs?
A: The 5820SMJ/TR13 meets electrical specifications but carries RoHS non-compliant status. For new designs subject to RoHS compliance requirements, this part is not recommended. Use active, ROHS3-compliant alternatives such as SS32-E3/9AT, B320-13-F, or CD214C-B320R.
Q: Can I substitute the DO-214AB (SMC) package with the SMA package (MDD SS32)?
A: Package substitution is possible only if the circuit board layout and assembly process accommodate the larger SMA footprint. The MDD SS32 provides identical electrical specifications but differs in physical dimensions. Mechanical compatibility must be verified before implementation.
Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?
A: Cut Tape (CT) packaging is supplied in individual strips suitable for manual component handling and small-volume assembly. Tape & Reel (TR) packaging is supplied on continuous reels optimized for automated pick-and-place assembly equipment. Electrical specifications are identical; selection depends on assembly process requirements.
Q: Which substitute part has the lowest reverse leakage current?
A: The Panjit International Inc. SK32_R1_00001 exhibits the lowest reverse leakage current at 200 µA @ 20 V, compared to 500 µA for most Vishay and Diodes Incorporated equivalents. This characteristic may provide performance advantages in low-leakage or high-impedance circuit applications.
Q: Are all listed substitutes ROHS3 compliant?
A: All listed substitutes except the Microchip Technology 5820SMJ/TR13 are ROHS3 compliant. The 5820SMJ/TR13 is RoHS non-compliant and is not recommended for applications requiring regulatory compliance.
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