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3KASMC10AHE3_A/I Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts
Part Overview
The 3KASMC10AHE3_A/I is a unidirectional Zener TVS diode manufactured by Vishay General Semiconductor - Diodes Division, designed for transient voltage suppression in surface mount applications. This component features a 10V reverse standoff voltage, 17V maximum clamping voltage, and 177A peak pulse current capability in a DO-214AB (SMC) package. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Voltage - Reverse Standoff (Typ) | 10V |
| Voltage - Breakdown (Min) | 11.1V |
| Voltage - Clamping (Max) @ Ipp | 17V |
| Current - Peak Pulse (10/1000µs) | 177A |
| Power - Peak Pulse | 3000W (3kW) |
| Package / Case | DO-214AB, SMC |
| Operating Temperature Range | -65°C ~ 185°C (TJ) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Grade | Automotive |
| Qualification | AEC-Q101 |
Substitute Part Grouping Explanation
Substitution validity for the 3KASMC10AHE3_A/I is determined by strict alignment of the following electrical and mechanical parameters:
Critical Matching Parameters:
- Voltage - Reverse Standoff: 10V (nominal)
- Voltage - Breakdown (Min): 11.1V
- Voltage - Clamping (Max) @ Ipp: 17V
- Package / Case: DO-214AB (SMC)
- Mounting Type: Surface Mount
- Unidirectional Channels: 1
Acceptable Variation Parameters:
- Current - Peak Pulse (10/1000µs): 88.3A to 177A (higher values provide equivalent or superior performance)
- Power - Peak Pulse: 1500W to 3000W (higher values provide equivalent or superior performance)
- Operating Temperature Range: Minimum -55°C to -65°C; Maximum 150°C to 185°C (ranges that encompass or match the original specification)
Substitute parts must maintain identical voltage specifications and package form factor. Peak pulse current and power dissipation may vary within the ranges specified, as higher ratings provide equivalent circuit protection with enhanced margin. Operating temperature ranges must support the application's thermal requirements.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Package / Case | Operating Temperature | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| 3KASMC10AHE3_A/I | Vishay General Semiconductor - Diodes Division | 10V | 11.1V | 17V | 177A | 3000W | DO-214AB, SMC | -65°C ~ 185°C | Obsolete |
| 3KASMC10AHE3_B/I | Vishay General Semiconductor - Diodes Division | 10V | 11.1V | 17V | 177A | 3000W | DO-214AB, SMC | -65°C ~ 185°C | Active |
| SMCJ10A | Meritek | 10V | 11.1V | 17V | 88.24A | 1500W | DO-214AB, SMC | -55°C ~ 150°C | Active |
| SMCJ10A-HR | Littelfuse Inc. | 10V | 11.1V | 17V | 88.3A | 1500W | DO-214AB, SMC | -65°C ~ 150°C | Active |
| SMCJ10A-HRA | Littelfuse Inc. | 10V | 11.1V | 17V | 88.3A | 1500W | DO-214AB, SMC | -65°C ~ 150°C | Active |
| SMCJ10A-HRAT7 | Littelfuse Inc. | 10V | 11.1V | 17V | 88.3A | 1500W | DO-214AB, SMC | -65°C ~ 150°C | Active |
| SMCJ10A-TP | Micro Commercial Co | 10V | 11.1V | 17V | 88.3A | 1500W | DO-214AB, SMC | -55°C ~ 175°C | Active |
| SMDJ10A | Alpha & Omega Semiconductor Inc. | 10V | 11.1V | 17V | 176.5A | 3000W | DO-214AB, SMC | -55°C ~ 150°C | Active |
| SMDJ10A-HR | Littelfuse Inc. | 10V | 11.1V | 17V | 176.5A | 3000W | DO-214AB, SMC | -65°C ~ 150°C | Active |
Engineering Selection Recommendations
Primary Recommendation: 3KASMC10AHE3_B/I
The 3KASMC10AHE3_B/I is the direct active equivalent from Vishay General Semiconductor - Diodes Division. This part maintains identical electrical specifications (10V standoff, 11.1V breakdown, 17V clamping, 177A peak pulse, 3000W power dissipation) and thermal range (-65°C ~ 185°C) as the obsolete 3KASMC10AHE3_A/I. It carries the same automotive grade qualification (AEC-Q101) and ROHS3 compliance. The only difference is packaging format (Tape & Reel vs. bulk), making this the optimal direct replacement for production continuity.
Secondary Recommendations: SMDJ10A and SMDJ10A-HR
Both SMDJ10A (Alpha & Omega Semiconductor Inc.) and SMDJ10A-HR (Littelfuse Inc.) provide equivalent electrical performance with 176.5A peak pulse current and 3000W power dissipation, matching the original part's power handling capability. These parts maintain the critical voltage specifications (10V standoff, 11.1V breakdown, 17V clamping) and DO-214AB package form factor. SMDJ10A-HR extends the lower temperature limit to -65°C, aligning with the original specification's thermal range.
Alternative Recommendations: SMCJ10A Series (Littelfuse and Meritek)
The SMCJ10A-HR, SMCJ10A-HRA, and SMCJ10A-HRAT7 (Littelfuse Inc.) and SMCJ10A (Meritek) maintain identical voltage specifications and package compatibility. These parts feature reduced peak pulse current (88.3A) and power dissipation (1500W) compared to the original. Selection of these alternatives is appropriate for applications where the original 177A/3000W specification exceeds circuit protection requirements. Littelfuse variants support -65°C lower temperature limit; Meritek variant operates to -55°C.
Temperature Consideration: SMCJ10A-TP
The SMCJ10A-TP (Micro Commercial Co) offers an extended upper operating temperature of 175°C, approaching the original specification's 185°C maximum. This variant is suitable for high-temperature applications where thermal margin is critical, though peak pulse current remains at 88.3A.
All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, and surface mount DO-214AB (SMC) package compatibility.
Frequently Asked Questions (FAQ)
Q: Can I use SMCJ10A series parts as direct replacements for the 3KASMC10AHE3_A/I?
A: SMCJ10A series parts (including SMCJ10A-HR, SMCJ10A-HRA, SMCJ10A-HRAT7, and SMCJ10A-TP) are electrically compatible substitutes. All maintain the critical voltage specifications (10V standoff, 11.1V breakdown, 17V clamping) and DO-214AB package form factor. However, these parts feature 88.3A peak pulse current and 1500W power dissipation, compared to the original 177A and 3000W. Selection depends on whether your circuit design requires the higher current/power rating of the original part or if the reduced specification is sufficient for your protection requirements.
Q: What is the difference between 3KASMC10AHE3_A/I and 3KASMC10AHE3_B/I?
A: Both parts are manufactured by Vishay and share identical electrical specifications and thermal ratings. The primary difference is packaging: 3KASMC10AHE3_A/I is supplied in bulk packaging, while 3KASMC10AHE3_B/I is supplied in Tape & Reel format. The 3KASMC10AHE3_B/I is the active production equivalent and is recommended for new designs and production orders.
Q: Why do SMDJ10A and SMDJ10A-HR have different peak pulse current ratings than SMCJ10A variants?
A: SMDJ10A and SMDJ10A-HR are designed for higher current pulse applications, delivering 176.5A peak pulse current and 3000W power dissipation, matching the original 3KASMC10AHE3_A/I specification. SMCJ10A series parts are rated for 88.3A peak pulse and 1500W, suitable for lower-current transient suppression. Both families maintain identical voltage clamping characteristics and package compatibility. Selection should be based on the peak pulse current requirement of your circuit.
Q: Are all substitute parts automotive-grade qualified?
A: The 3KASMC10AHE3_A/I and 3KASMC10AHE3_B/I carry AEC-Q101 automotive qualification. Littelfuse SMDJ10A-HR and SMCJ10A-HR variants are specified for general purpose applications. If automotive qualification is a design requirement, verify with the manufacturer or component datasheet before selection.
Q: What is the significance of the temperature range difference between -55°C and -65°C?
A: The original 3KASMC10AHE3_A/I operates from -65°C to 185°C. Substitute parts vary: Littelfuse variants (SMCJ10A-HR, SMCJ10A-HRA, SMDJ10A-HR) support -65°C minimum; Meritek SMCJ10A and Alpha & Omega SMDJ10A support -55°C minimum. If your application requires operation below -55°C, select Littelfuse variants or the direct Vishay equivalent 3KASMC10AHE3_B/I.
Q: Can I use parts with lower power ratings (1500W) in place of the original 3000W specification?
A: SMCJ10A series parts rated at 1500W are suitable if your circuit's transient energy does not exceed this dissipation limit. The voltage clamping performance remains identical. Verify your circuit's peak pulse energy requirement against the substitute part's power rating. If uncertainty exists, select SMDJ10A or SMDJ10A-HR, which match the original 3000W specification.
Q: Are all substitute parts available in Tape & Reel packaging?
A: Most active substitutes are available in Tape & Reel format for production assembly. Verify packaging availability with your supplier, as some manufacturers offer multiple packaging options. The 3KASMC10AHE3_B/I is specifically supplied in Tape & Reel format.
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