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Vishay General Semiconductor - Diodes Division SMB10J12AHM3/H
- Part No.:
- SMB10J12AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J12AHM3/H.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,337
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Product details
Overview
SMB10J12AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 12 V stand-off voltage (VWM), 19.9 V clamping voltage at 50.3 A peak pulse current (10/1000 µs), and 1000 W peak pulse power rating. It is AEC-Q101 qualified and halogen-free, targeting automotive power line protection.
For engineers reviewing the SMB10J12AHM3/H datasheet, SMB10J12AHM3/H pinout, SMB10J12AHM3/H application, or SMB10J12AHM3/H equivalent, key selection criteria include clamping performance under 10/1000 µs transients, AEC-Q101 qualification status, thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ps) to ESD and lightning-induced surges. Its unidirectional polarity enables integration into DC-biased circuits without reverse conduction during normal operation.
The device operates within -55 °C to +150 °C junction temperature range and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its low incremental surge resistance ensures minimal voltage overshoot during high-current transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin. |
| VBR min/max | 13.3 V / 14.7 V at 1 mA - Breakdown threshold range; ensures reliable turn-on above nominal rail. |
| VC @ IPPM | 19.9 V at 50.3 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level. |
| PPPM | 1000 W - Peak pulse power handling capacity; supports high-energy transients per ISO 7637-2 Pulse 1/2a/5a. |
| IFSM | 100 A - Non-repetitive forward surge current (8.3 ms half-sine); validates robustness against load dump events. |
| RθJA | 72 °C/W - Junction-to-ambient thermal resistance; requires ≥0.2" × 0.2" copper pad per terminal for rated derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to lower-potential side of protected line; conducts during surge clamp in reverse bias. |
| Cathode | Reverse voltage reference / clamping node | Marked end; ties to higher-potential rail (e.g., battery+); defines VWM and VC reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable breakdown characteristics and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1 rating | Enables standard SMT reflow without baking; peak temperature tolerance up to 260 °C. |
| Halogen-free & RoHS-compliant | Meets automotive environmental requirements (IEC 61249-2-21); no brominated flame retardants. |
| Low profile SMB package | 0.130" × 0.205" footprint fits space-constrained automotive ECUs and ADAS modules. |
| Automated placement compatible | Matte tin plating and defined lead geometry support high-yield pick-and-place with <±0.05 mm placement accuracy. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in body control modules against load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp transients above 12 V while remaining non-conductive during normal operation. Use Value: Limits voltage seen by downstream LDOs and MCUs to ≤19.9 V during 50.3 A surges, preventing latch-up or permanent damage. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs from EFT and inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across differential signal pair to suppress common-mode transients without distorting 1–10 kHz measurement signals. Use Value: Maintains signal integrity with <100 pF junction capacitance while absorbing 1000 W surges per IEC 61000-4-4. |
| Consumer USB Power Input Protection | Telecom DC Feeder Line Protection |
|
Use Scenario: Safeguarding USB-C PD input stages in portable medical devices against accidental 24 V adapter misconnection and ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBUS line that activates only above 12 V, allowing full 5–20 V PD negotiation range. Use Value: Enables compliance with IEC 61000-4-2 Level 4 (±15 kV air/±8 kV contact) without affecting USB enumeration timing. |
Use Scenario: Protecting -48 V DC telecom power feeds in remote radio units from lightning-induced longitudinal surges on outdoor cable runs. IC Role / Device Role / Timing Role: Unidirectional TVS installed between feed line and chassis ground to shunt common-mode energy while preserving negative bias. Use Value: Withstands repeated 10/1000 µs surges up to 1000 W and maintains leakage <5 µA at -12 V, ensuring low standby loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12AHE3/A | Same VWM (12 V), VC = 19.9 V, but rated PPPM = 600 W (not 1000 W); RoHS-compliant but not AEC-Q101 qualified. | Limited to commercial/industrial use; insufficient for automotive load dump per ISO 7637-2 Pulse 5a. | Select when cost sensitivity outweighs automotive qualification and 1000 W surge headroom is unnecessary. |
| SAC12 | Same VWM (12 V), bidirectional, PPPM = 1500 W, but larger SMA package (DO-214AC); AEC-Q101 qualified. | Supports AC-coupled or floating signal lines; requires larger PCB area and different pad layout. | Choose for higher-power bidirectional protection where SMB footprint is not mandatory and board space allows SMA. |
Compared with SMBJ12AHE3/A, SMB10J12AHM3/H delivers 67% higher surge power handling and automotive qualification; versus SAC12, it offers identical clamping but in a 25% smaller SMB footprint-critical for dense automotive PCBs-while sacrificing bidirectionality.
Availability
SMB10J12AHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom DC feeder protection requiring stable component supply, AEC-Q101 validation, and high-power transient immunity.
Supply support for SMB10J12AHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The SMB10J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy automotive and industrial surge suppression where compact size, AEC-Q101 compliance, and precise clamping are mandatory.
FAQ
What is the clamping voltage of SMB10J12AHM3/H under a 10/1000 µs surge?
The SMB10J12AHM3/H clamps to a maximum of 19.9 V when subjected to its rated peak pulse current of 50.3 A using the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C with devices mounted on 0.2" × 0.2" copper pads per terminal, and is critical for determining maximum stress on downstream ICs. The SMB10J12AHM3/H datasheet specifies this parameter in Table 1 under "Maximum Clamping Voltage at IPPM".
Is SMB10J12AHM3/H qualified for automotive applications?
Yes, SMB10J12AHM3/H is explicitly AEC-Q101 qualified, as confirmed in the Vishay document 88422 (Revision 09-Jan-2024), Section "FEATURES". The "HM3" suffix denotes halogen-free, RoHS-compliant construction with full AEC-Q101 stress testing-including temperature cycling, high-temperature reverse bias, and ESD-making it suitable for under-hood and chassis-mounted automotive systems. This qualification applies directly to the SMB10J12AHM3/H part number.
What is the standoff voltage (VWM) and why does it matter for SMB10J12AHM3/H?
The standoff voltage VWM of SMB10J12AHM3/H is 12 V, meaning it remains in high-impedance state below this reverse voltage and does not interfere with normal circuit operation. This value must exceed the maximum steady-state voltage of the protected line-e.g., a 12 V automotive system with ±10% tolerance (13.2 V max) requires careful design margin, as VWM = 12 V leaves limited headroom. Engineers must verify that system ripple and transients stay below VBR min (13.3 V) to avoid premature conduction. The SMB10J12AHM3/H specification sheet lists VWM in the "ELECTRICAL CHARACTERISTICS" table.
Can SMB10J12AHM3/H be used in bidirectional configurations?
No, SMB10J12AHM3/H is a unidirectional TVS diode, as indicated by its part number suffix "A" (vs. "CA" for bidirectional variants like SMB8J12CA). Its internal structure permits conduction only from cathode to anode during surge events, making it unsuitable for AC or floating signal lines. Attempting bidirectional use would result in forward conduction on one polarity and no protection on the other. For bidirectional needs, select a part with "CA" suffix or consult the SMB8J series documented alongside SMB10J12AHM3/H in Vishay doc 88422.
What is the thermal resistance and how does it affect SMB10J12AHM3/H layout?
The SMB10J12AHM3/H has a typical junction-to-ambient thermal resistance RθJA of 72 °C/W, measured with 0.2" × 0.2" copper pads per terminal. This value directly impacts PCB layout: reducing pad size or omitting thermal vias increases junction temperature during surge events, accelerating degradation and potentially causing thermal runaway. To maintain rated 1000 W pulse capability, designers must implement minimum recommended copper area per the Vishay SMB (DO-214AA) mounting pad layout in document 88422, page 5. The SMB10J12AHM3/H thermal performance is validated only under these conditions.
SMB10J12AHM3/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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 50.3A
- 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)
SMB10J12AHM3/H FAQ
1.How can I place an order for SMB10J12AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J12AHM3/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 SMB10J12AHM3/H reliable?
The price and inventory of SMB10J12AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J12AHM3/H is usually 5 days.
3.What payment methods are accepted for SMB10J12AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J12AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J12AHM3/H?
SMB10J12AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J12AHM3/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 SMB10J12AHM3/H?
For technical support, including SMB10J12AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J12AHM3/H requirements.
6.How does Aetrix verify that SMB10J12AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMB10J12AHM3/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 SMB10J12AHM3/H meets industry standards.
7.What is the process for return or replacement of SMB10J12AHM3/H?
All SMB10J12AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J12AHM3/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 SMB10J12AHM3/H part is unused and in its original packaging.
Return procedure for SMB10J12AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J12AHM3/H Tags
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