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Vishay General Semiconductor - Diodes Division SMB10J12AHM3_B/I
- Part No.:
- SMB10J12AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J12AHM3_B/I.pdf
- Description:
- 1KW,12V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,201
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Product details
Overview
SMB10J12AHM3_B/I 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), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 19.9 V clamping voltage (VC) at 50.3 A peak pulse current (IPPM), and 1000 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive ECUs, industrial sensor interfaces, and power supply input stages.
For engineers reviewing the SMB10J12AHM3_B/I datasheet, SMB10J12AHM3_B/I pinout, SMB10J12AHM3_B/I application, or SMB10J12AHM3_B/I equivalent, key selection criteria include AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (VC/VWM ≈ 1.66), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its thermal design targets ≤150 °C maximum junction temperature, supported by RθJA = 72 °C/W and RθJL = 20 °C/W, enabling reliable operation under repeated 8.3 ms half-sine surges up to 100 A IFSM.
The SMB10J12AHM3_B/I is rated per ANSI/IEEE C62.35 and meets J-STD-020 MSL level 1 (260 °C peak reflow). Its cathode-band polarity marking and matte tin-plated leads ensure solderability per J-STD-002 and JESD 22-B102, with whisker resistance per JESD 201 Class 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 13.3 V / 14.7 V at 1 mA - ensures predictable turn-on threshold across production lot |
| VC @ IPPM | 19.9 V at 50.3 A - limits downstream voltage stress during 1000 W transient events |
| PPPM | 1000 W (10/1000 µs) - sustains high-energy surges common in automotive load-dump and inductive switching |
| IFSM | 100 A (8.3 ms half-sine) - withstands single-event surge currents without bond-wire fusing |
| TJ max | +150 °C - supports under-hood automotive environments and high-power industrial enclosures |
| Package | SMB (DO-214AA) - 0.220" × 0.130" footprint compatible with standard SMT pick-and-place and reflow profiles |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with UL 94 V-0 flammability rating; cathode indicated by color band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected circuit ground | Current path during forward conduction; tied to system GND in unidirectional configuration |
| Cathode | High-side connection to protected line (e.g., +12 V rail) | Reverse-biased terminal during normal operation; conducts when Vline exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant | HM3 suffix confirms full compliance with EU RoHS Directive 2011/65/EU and halogen-free material requirements |
| Low clamping ratio (VC/VWM) | 1.66 - minimizes overvoltage exposure to downstream ICs such as CAN transceivers or microcontrollers |
| MSL Level 1 | Rated for peak reflow of 260 °C - eliminates moisture sensitivity concerns in standard SMT assembly |
| Glass-passivated junction | Enhances long-term stability and reduces leakage drift under thermal stress vs. epoxy-passivated alternatives |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Stage |
|---|---|
Use Scenario: Protecting 12 V supply inputs against ISO 7637-2 Pulse 5a (load dump) and Pulse 1/2a transients in BCM power distribution networks. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed upstream of LDO regulators and MCU power pins. Use Value: Limits transient voltage to ≤19.9 V, preventing latch-up or permanent damage to 16-bit MCUs and CAN FD controllers operating at 12 V nominal. | Use Scenario: Safeguarding 24 V digital input channels from field-induced surges caused by relay coil de-energization or cable ESD in factory automation systems. IC Role / Device Role / Timing Role: Primary surge suppression element between field wiring and optocoupler input stage. Use Value: Absorbs 1000 W pulses without degradation, maintaining <1 μA leakage at 12 V to preserve input logic threshold integrity. |
| Automotive Infotainment Power Rail | DC-DC Converter Input Protection |
Use Scenario: Shielding USB-C PD controller and audio codec power supplies from battery-line transients during cold-crank and jump-start conditions. IC Role / Device Role / Timing Role: Secondary overvoltage clamp after primary fuse and common-mode choke filtering. Use Value: Fast response (<1 ns) and low Rsurge prevent voltage overshoot exceeding 20 V at converter input capacitors. | Use Scenario: Protecting buck converter front-end MOSFETs and gate drivers from reflected surge energy originating at motor drive outputs. IC Role / Device Role / Timing Role: Parallel-connected TVS on VIN pin to clamp inductive kickback before it reaches switching node. Use Value: Withstands 100 A IFSM surge, ensuring no failure during repetitive motor stall events in HVAC blower modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12AHE3_A/H | Same VWM (12 V), VBR (13.3–14.7 V), VC (19.9 V), but commercial-grade (non-AEC-Q101); E3 suffix = RoHS-compliant, not halogen-free | Lacks automotive qualification; suitable for industrial/commercial power supplies where AEC-Q101 is not mandated | Select when cost sensitivity outweighs automotive reliability requirements and halogen-free materials are not required |
| SMAJ12AHE3_A/H | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W), same VWM/VBR/VC specs | Insufficient for 1000 W load-dump events; limited to low-energy signal-line protection or secondary clamping | Choose only for space-constrained non-automotive designs with ≤400 W surge exposure and ambient <85 °C |
Compared with SMBJ12AHE3_A/H and SMAJ12AHE3_A/H, SMB10J12AHM3_B/I delivers AEC-Q101 assurance, halogen-free construction, and 2.5× higher peak power handling - making it the sole option for robust 12 V automotive power rail protection where regulatory compliance and thermal margin are critical.
Availability
SMB10J12AHM3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and power supply design requiring stable component supply, AEC-Q101 traceability, and halogen-free manufacturing compliance.
Supply support for SMB10J12AHM3_B/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 high-reliability, high-power-density solutions.
The SMB10J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for automotive and industrial applications demanding AEC-Q101 qualification, high PPPM, and consistent clamping performance under thermal stress.
FAQ
What is the clamping voltage of SMB10J12AHM3_B/I at its rated peak pulse current?
The SMB10J12AHM3_B/I has a maximum clamping voltage (VC) of 19.9 V at 50.3 A peak pulse current (IPPM), measured using the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated 1000 W transient event, ensuring downstream components like 12 V-rated MCUs remain within safe operating limits. The SMB10J12AHM3_B/I maintains this clamping performance across its specified junction temperature range.
Is SMB10J12AHM3_B/I qualified for automotive use?
Yes, SMB10J12AHM3_B/I is AEC-Q101 qualified, as confirmed by Vishay's documentation and the HM3 suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 requirements. The SMB10J12AHM3_B/I is intended for under-hood and cabin applications where reliability under thermal and electrical stress is mandatory.
What does the "HM3_B/I" suffix indicate in SMB10J12AHM3_B/I?
The "HM3" portion signifies halogen-free, RoHS-compliant, and AEC-Q101 qualified construction; "B" denotes the revision code; and "I" specifies packaging in 13-inch tape-and-reel format with 3200 units per reel. This ordering code ensures traceability to Vishay's automotive-grade production lot, full material compliance documentation, and compatibility with high-volume SMT assembly lines requiring large reels. The SMB10J12AHM3_B/I suffix directly maps to Vishay's official ordering nomenclature in Document Number 88422.
Can SMB10J12AHM3_B/I be used in bidirectional configurations?
No, SMB10J12AHM3_B/I is a unidirectional TVS diode, as indicated by its part number structure (no "C" suffix) and confirmed by its electrical specifications - including forward surge current rating (IFSM = 100 A) and absence of symmetrical bidirectional VBR data. For bidirectional protection, Vishay offers the SMB8J12CA variant with 800 W PPPM and matched ±13.3–14.7 V breakdown. Using SMB10J12AHM3_B/I in bidirectional circuits would result in unintended forward conduction and potential failure.
What is the thermal resistance from junction to ambient for SMB10J12AHM3_B/I?
The SMB10J12AHM3_B/I 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, as specified in Vishay's datasheet. This value assumes standard PCB layout per the recommended pad dimensions and is critical for calculating steady-state junction temperature rise under DC leakage or repetitive surge conditions. The SMB10J12AHM3_B/I also exhibits RθJL = 20 °C/W, supporting efficient heat transfer to PCB copper planes.
SMB10J12AHM3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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_B/I FAQ
1.How can I place an order for SMB10J12AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J12AHM3_B/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 SMB10J12AHM3_B/I reliable?
The price and inventory of SMB10J12AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J12AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMB10J12AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J12AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J12AHM3_B/I?
SMB10J12AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J12AHM3_B/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 SMB10J12AHM3_B/I?
For technical support, including SMB10J12AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J12AHM3_B/I requirements.
6.How does Aetrix verify that SMB10J12AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB10J12AHM3_B/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 SMB10J12AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMB10J12AHM3_B/I?
All SMB10J12AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J12AHM3_B/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 SMB10J12AHM3_B/I part is unused and in its original packaging.
Return procedure for SMB10J12AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J12AHM3_B/I Tags
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