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Vishay General Semiconductor - Diodes Division SMC5K20AHM3_A/I
- Part No.:
- SMC5K20AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K20AHM3_A/I.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,125
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Product details
Overview
SMC5K20AHM3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It features 5000 W peak pulse power (10/1000 μs), 22.2–24.5 V breakdown voltage (VBR), and clamps to ≤32.4 V at 154 A peak pulse current - deployed in automotive ECUs, industrial motor drives, and telecom interface circuits.
For engineers reviewing the SMC5K20AHM3_A/I datasheet, SMC5K20AHM3_A/I pinout, SMC5K20AHM3_A/I application, or SMC5K20AHM3_A/I equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RthJA = 90 °C/W), clamping performance under 8/20 μs surges, and direct replacement guidance for automotive-grade TVS selection.
Technical Context
This device operates as a unidirectional avalanche diode with fast response time (<1 ns) and low incremental surge resistance, enabling precise clamping during ESD and lightning-induced transients. Its junction-to-ambient thermal resistance of 90 °C/W and maximum junction temperature of +150 °C support reliable operation in high-temperature automotive under-hood environments.
The SMC5K20AHM3_A/I meets IEC 61000-4-2 (±30 kV contact/air discharge) and is AEC-Q101 qualified per JESD22-A114 - confirmed for SMC5K10A–SMC5K20A variants only. Its halogen-free, RoHS-compliant construction and matte tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.2 V / 24.5 V at 1.0 mA - defines minimum voltage at which avalanche conduction begins; ensures reliable turn-on before downstream IC damage. |
| VWM | 20 V - maximum continuous reverse operating voltage; sets safe DC bias limit without leakage degradation. |
| VC @ IPPM (10/1000 μs) | ≤32.4 V at 154 A - clamping voltage under standard surge waveform; determines protected circuit's maximum transient stress level. |
| PPPM | 5000 W (10/1000 μs) - peak pulse power handling capacity; enables robust protection against inductive switching spikes. |
| TJ max. | +150 °C - maximum junction temperature; supports operation in engine control modules and industrial power supplies. |
| RthJA | 90 °C/W - thermal resistance from junction to ambient on FR4 PCB; informs heatsinking needs for sustained surge duty cycles. |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact/air) - qualifies for high-reliability human interaction interfaces and exposed connectors. |
Pinout & Package
Package: SMC (DO-214AB) - surface-mount plastic case with cathode band marking; dimensions 7.11 mm × 6.22 mm × 2.34 mm (L × W × H); UL 94 V-0 rated molding compound; matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to protected line ground or low-side reference. | Provides return path for surge current; must be routed with low-inductance trace to minimize clamping overshoot. |
| Cathode | Current exit terminal during reverse-biased clamping; connected to protected line (e.g., 24 V rail or CAN_H). | Acts as the "protected node" side; polarity band identifies this terminal - critical for correct orientation in series-connected protection schemes. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensors - ensures reliability over 15-year vehicle lifetime. |
| 5000 W peak pulse power (10/1000 μs) | Supports protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges without derating on standard PCB footprints. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream MOSFETs or microcontrollers - reduces need for additional voltage margin in system design. |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates (e.g., EU RoHS, China RoHS) without compromising surge performance or thermal stability. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without moisture-related popcorning or delamination risks. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps 120 V/200 A load dump events to ≤32.4 V, preventing overvoltage shutdown of PMICs and preserving system uptime. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional placement referenced to sensor ground. Use Value: Limits ESD-induced latch-up on op-amp inputs and maintains signal integrity during maintenance hot-plug events. |
| Telecom Data Line Surge Suppression | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Shielding RS-485 transceiver I/O pins in base station backhaul equipment from lightning-induced surges. IC Role / Device Role / Timing Role: TVS placed directly at connector entry point, upstream of TVS array or integrated protection IC. Use Value: Withstands 8/20 μs surges up to 935 A while maintaining <1 ns response - prevents data corruption and transceiver latch-up. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Mounted across motor terminals or between H-bridge high-side switch and supply rail. Use Value: Absorbs repetitive 5000 W pulses without parameter drift, extending MOSFET lifetime and reducing field failure rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-M3/86A | Lower peak pulse power (400 W vs. 5000 W); SMA package (smaller footprint, higher RthJA = 150 °C/W). | Suitable for low-energy ESD-only protection; insufficient for load dump or lightning surges. | Select when space-constrained and only IEC 61000-4-2 ESD protection is needed - not for automotive power rail use. |
| SMCJ20A-HM3_A/I | Same SMC package and VWM/VBR range, but rated for 1500 W (10/1000 μs) - lower energy absorption than SMC5K20AHM3_A/I. | Meets AEC-Q101 but targets mid-tier surge immunity (e.g., ISO 16750-2 Level III), not full load dump. | Choose for cost-sensitive industrial designs where 5000 W capability is unnecessary - avoids over-specification. |
Compared with SMAJ20A-M3/86A and SMCJ20A-HM3_A/I, the SMC5K20AHM3_A/I delivers 3.3× higher peak pulse power than SMCJ20A and 12.5× more than SMAJ20A - making it the only option among the three qualified for full automotive load dump compliance without external energy-sharing components.
Availability
SMC5K20AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial motor drives, and telecom infrastructure requiring stable component supply with AEC-Q101 assurance and long-term production continuity.
Supply support for SMC5K20AHM3_A/I includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMC5K20AHM3_A/I belongs to Vishay's TRANSZORB® family - engineered specifically for high-energy transient suppression in harsh environments where AEC-Q101 qualification, low clamping voltage, and repeatable surge endurance are mandatory.
FAQ
What is the AEC-Q101 qualification status of SMC5K20AHM3_A/I?
The SMC5K20AHM3_A/I is AEC-Q101 qualified per JESD22-A114, as explicitly stated in the Vishay datasheet revision 09-Jan-2024 for the SMC5K10A–SMC5K20A series. This qualification covers temperature cycling, mechanical shock, humidity testing, and ESD robustness - confirming suitability for automotive under-hood and chassis applications. The HM3 suffix denotes AEC-Q101 compliance, halogen-free, and RoHS-compliant construction.
Does SMC5K20AHM3_A/I support both 10/1000 μs and 8/20 μs surge waveforms?
Yes, the SMC5K20AHM3_A/I is characterized for both waveforms: it delivers 5000 W peak pulse power under 10/1000 μs and 40 kW under 8/20 μs (per datasheet Section "FEATURES"). At 8/20 μs, its clamping voltage is 42.8 V at 935 A - critical for lightning surge immunity per IEC 61000-4-5. These values are measured and guaranteed, not extrapolated.
What is the meaning of the "_A/I" suffix in SMC5K20AHM3_A/I?
The "_A/I" suffix in SMC5K20AHM3_A/I indicates packaging and reel configuration: "A" is the revision code (per datasheet ordering table), and "I" specifies 13-inch diameter plastic tape and reel with 3500 units per reel. This matches Vishay's preferred ordering code SMC5K20AHM3_A/I shown in the "ORDERING INFORMATION" section of document 87742.
How does the clamping voltage of SMC5K20AHM3_A/I compare to its breakdown voltage?
The SMC5K20AHM3_A/I has a breakdown voltage (VBR) range of 22.2–24.5 V at 1.0 mA and clamps to ≤32.4 V at 154 A (10/1000 μs). This yields a clamping ratio (VC/VBRmin) of ~1.46 - a low value indicating efficient energy diversion with minimal overvoltage stress on protected ICs. The ratio is confirmed in Table "ELECTRICAL CHARACTERISTICS" on page 2 of document 87742.
Is SMC5K20AHM3_A/I compatible with lead-free reflow processes?
Yes, the SMC5K20AHM3_A/I meets MSL Level 1 per J-STD-020 with a maximum peak reflow temperature of 260 °C, supporting standard lead-free soldering profiles. Its matte tin-plated leads comply with J-STD-002 and JESD22-B102, and the HM3 suffix confirms JESD201 Class 2 whisker resistance - ensuring interconnect reliability after multiple reflow cycles.
SMC5K20AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 154.3A
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMC5K20AHM3_A/I FAQ
1.How can I place an order for SMC5K20AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K20AHM3_A/I on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMC5K20AHM3_A/I reliable?
The price and inventory of SMC5K20AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC5K20AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMC5K20AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K20AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K20AHM3_A/I?
SMC5K20AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K20AHM3_A/I order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMC5K20AHM3_A/I?
For technical support, including SMC5K20AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K20AHM3_A/I requirements.
6.How does Aetrix verify that SMC5K20AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMC5K20AHM3_A/I products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMC5K20AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMC5K20AHM3_A/I?
All SMC5K20AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K20AHM3_A/I, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMC5K20AHM3_A/I part is unused and in its original packaging.
Return procedure for SMC5K20AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K20AHM3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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