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Vishay General Semiconductor - Diodes Division SMB10J20AHM3/H
- Part No.:
- SMB10J20AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J20AHM3/H.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,084
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Product details
Overview
SMB10J20AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection with 1000 W peak pulse power (10/1000 µs), 20 V stand-off voltage (VWM), and 32.4 V clamping voltage (VC) at 30.9 A peak pulse current. It is AEC-Q101 qualified and used to protect automotive sensor signal lines, MOSFET gates, and microcontroller I/O pins against inductive switching transients.
For engineers reviewing the SMB10J20AHM3/H datasheet, SMB10J20AHM3/H pinout, SMB10J20AHM3/H application, or SMB10J20AHM3/H equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, clamping performance under 10/1000 µs surge, thermal resistance (RθJA = 72 °C/W), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, entering avalanche breakdown when reverse voltage exceeds its 22.2–24.5 V breakdown range (VBR at 1 mA). Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD and lightning-induced transients per IEC 61000-4-2/4-5.
The SMB10J20AHM3/H uses a glass-passivated pellet chip junction mounted in an SMB (DO-214AA) thermally optimized package with matte tin-plated leads. It supports automated SMT placement, meets MSL Level 1 (260 °C reflow), and is rated for -55 °C to +150 °C junction temperature operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin. |
| VBR (min/max) | 22.2 V / 24.5 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 32.4 V - Clamping voltage at 30.9 A peak pulse current (10/1000 µs); limits protected IC voltage stress during surge. |
| PPPM | 1000 W - Peak pulse power handling capability; enables robust protection against high-energy transients. |
| RθJA | 72 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs board-level thermal design. |
| TJ max. | +150 °C - Maximum junction temperature rating; supports under-hood automotive deployment. |
| AEC-Q101 | Qualified - Validated for automotive reliability including HTOL, TC, UHAST, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). Matte tin-plated leads, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential node in unidirectional configuration; carries forward surge current up to 100 A (8.3 ms half-sine). |
| Cathode (marked) | Reverse-biased clamping terminal | Connected to protected line; enters avalanche breakdown above VWM to shunt surge current away from downstream ICs. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS sensor interfaces requiring zero-failure field performance. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental compliance mandates without compromising surge robustness or thermal performance. |
| MSL Level 1 rating | Enables single-reflow assembly without moisture sensitivity concerns; peak reflow temperature up to 260 °C supported. |
| Low RθJL (20 °C/W) | Efficient heat transfer from junction to PCB pad improves sustained surge handling and thermal derating margin. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine control modules from load dump and inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected clamping device that diverts >1 kV transients away from ASIC input pins while maintaining signal integrity below 20 V. Use Value: Prevents latch-up or gate oxide damage in automotive-grade MCUs by limiting transient overvoltage to ≤32.4 V at 30.9 A. | Use Scenario: Safeguarding PLC digital input terminals exposed to relay coil flyback and contact arcing in factory automation systems. IC Role / Device Role / Timing Role: Standoff protector placed across optocoupler inputs or microcontroller GPIOs to absorb repetitive 10/1000 µs surges up to 1000 W. Use Value: Extends system uptime by eliminating false triggers and component failures caused by 600 V/1 A transients on 24 V DC control lines. |
| Automotive Power Supply Rail | Consumer Device USB Port |
Use Scenario: Secondary overvoltage clamp on 12 V battery rail after primary TVS or fuse, protecting PMICs and CAN transceivers during jump-start events. IC Role / Device Role / Timing Role: Fast-acting shunt element activated within nanoseconds to clamp 200 V/10 A pulses to <33 V, preserving downstream regulator input ratings. Use Value: Enables use of cost-optimized 36 V-rated input capacitors and avoids need for higher-voltage (and larger) input stage components. | Use Scenario: ESD and surge protection for USB 2.0 data lines and VBUS in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF at 0 V) unidirectional clamp placed between connector and PHY IC to meet IEC 61000-4-2 Level 4 (±15 kV air). Use Value: Maintains signal integrity at 480 Mbps while suppressing ±30 kV contact ESD pulses without signal distortion or data corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A-E3/52 | Same VWM (20 V), same SMB package, but commercial-grade (non-AEC-Q101), RoHS-compliant only (not halogen-free). | Lacks automotive qualification; suitable for industrial or consumer designs where AEC-Q101 is not mandated. | Select SMBJ20A-E3/52 if cost sensitivity outweighs automotive reliability requirements and halogen-free material is not required. |
| SMCJ20A-HM3 | Higher power rating (1500 W), larger SMC (DO-214AB) package, identical VWM and clamping voltage, AEC-Q101 and halogen-free. | Requires larger PCB footprint; preferred where higher surge margin (>1000 W) is needed without changing circuit topology. | Choose SMCJ20A-HM3 when system-level surge testing exceeds 1000 W or when thermal dissipation demands lower RθJA than SMB allows. |
Compared with SMBJ20A-E3/52 and SMCJ20A-HM3, the SMB10J20AHM3/H uniquely balances AEC-Q101 qualification, halogen-free compliance, and compact SMB footprint - making it optimal for space-constrained automotive ECUs where both reliability and regulatory compliance are mandatory.
Availability
SMB10J20AHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and consumer USB power delivery systems requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for SMB10J20AHM3/H 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 SMB10JxxA series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, automotive-grade transient suppression in harsh environments where AEC-Q101 validation and thermal robustness are critical.
FAQ
What is the clamping voltage of SMB10J20AHM3/H at its rated peak pulse current?
The SMB10J20AHM3/H has a maximum clamping voltage (VC) of 32.4 V at its rated peak pulse current (IPPM) of 30.9 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry will not experience voltages exceeding 32.4 V during a full-rated transient event. The SMB10J20AHM3/H maintains this clamping performance across its operational temperature range (-55 °C to +150 °C), with minor derating above 25 °C ambient.
Is SMB10J20AHM3/H suitable for automotive applications?
Yes, SMB10J20AHM3/H is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It has passed stress tests including high-temperature operating life, temperature cycling, unbiased highly accelerated stress testing, and ESD per AEC standards. The SMB10J20AHM3/H is deployed in engine control units, body control modules, and ADAS sensor interfaces where reliability under thermal and electrical stress is non-negotiable.
What does the "HM3" suffix indicate in SMB10J20AHM3/H?
The "HM3" suffix in SMB10J20AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JESD201 Class 2 whisker resistance, UL 94 V-0 flammability rating for the molding compound, and matte tin-plated leads solderable per J-STD-002. Unlike E3 or M3 variants, HM3 ensures full automotive-grade material compliance without trade-offs in surge capability or thermal performance.
How does SMB10J20AHM3/H differ from SMBJ20A in terms of surge capability?
SMB10J20AHM3/H and SMBJ20A share identical VWM (20 V), VBR (22.2–24.5 V), and VC (32.4 V), but SMB10J20AHM3/H is rated for 1000 W peak pulse power (10/1000 µs), whereas SMBJ20A is rated for 600 W. This 67% higher power rating gives SMB10J20AHM3/H superior energy absorption capacity, enabling it to survive more severe transients such as ISO 7637-2 Pulse 5a without degradation. Both use the SMB package, but only SMB10J20AHM3/H carries AEC-Q101 and halogen-free certification.
What is the thermal resistance of SMB10J20AHM3/H, and how does it affect layout design?
The SMB10J20AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard PCB copper area and no internal plane layers. To maintain safe junction temperatures during repetitive surges, designers must provide adequate copper pour and consider RθJL (20 °C/W) for heat conduction into the PCB. Reducing RθJA through additional thermal vias or larger pads directly improves surge endurance and long-term reliability of the SMB10J20AHM3/H.
SMB10J20AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 30.9A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J20AHM3/H FAQ
1.How can I place an order for SMB10J20AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J20AHM3/H 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 SMB10J20AHM3/H reliable?
The price and inventory of SMB10J20AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J20AHM3/H is usually 5 days.
3.What payment methods are accepted for SMB10J20AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J20AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J20AHM3/H?
SMB10J20AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J20AHM3/H 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 SMB10J20AHM3/H?
For technical support, including SMB10J20AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J20AHM3/H requirements.
6.How does Aetrix verify that SMB10J20AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMB10J20AHM3/H 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 SMB10J20AHM3/H meets industry standards.
7.What is the process for return or replacement of SMB10J20AHM3/H?
All SMB10J20AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J20AHM3/H, 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 SMB10J20AHM3/H part is unused and in its original packaging.
Return procedure for SMB10J20AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J20AHM3/H Tags
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