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Vishay General Semiconductor - Diodes Division SMB10J12AHM3_A/H
- Part No.:
- SMB10J12AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J12AHM3_A/H.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,125
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Product details
Overview
SMB10J12AHM3_A/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), 12 V stand-off voltage (VWM), and 19.9 V clamping voltage (VC) at 50.3 A peak pulse current. It is AEC-Q101 qualified and used to protect automotive sensor signal lines and MOSFET gate drivers against inductive switching transients.
For engineers reviewing the SMB10J12AHM3_A/H datasheet, SMB10J12AHM3_A/H pinout, SMB10J12AHM3_A/H application, or SMB10J12AHM3_A/H equivalent, this device is selected for robust ESD and surge immunity in 12 V automotive subsystems where low clamping voltage, fast response (<1 ns), and halogen-free RoHS compliance are required.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents <1 µA leakage at 12 V (VWM), then avalanches sharply at 13.3–14.7 V (VBR, IT = 1 mA) to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Thermal performance is defined by RθJA = 72 °C/W and RθJL = 20 °C/W, enabling reliable operation up to TJ = 150 °C. The device meets MSL Level 1 (260 °C reflow) and is rated for non-repetitive 100 A forward surge (IFSM), supporting protection of power-switching nodes in automotive ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before conduction begins; matches standard 12 V automotive supply rails. |
| VBR (min/max) | 13.3 V / 14.7 V - breakdown occurs within this range at 1 mA test current; ensures tight tolerance for predictable clamping onset. |
| VC @ IPPM | 19.9 V - clamping voltage at 50.3 A peak pulse current (10/1000 µs); limits voltage seen by protected circuit during surge. |
| PPPM | 1000 W - peak pulse power handling capability; supports high-energy transients per ISO 7637-2 Pulse 1/2a/5a. |
| ID @ VWM | 5.0 µA - reverse leakage at 12 V; low enough to avoid loading sensitive analog or logic inputs. |
| TJ max. | 150 °C - maximum junction temperature; enables use in under-hood automotive environments. |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD (HBM ≥ 8 kV). |
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 | Current entry terminal during reverse-biased clamping | Connected to protected line (e.g., sensor output); conducts surge current to ground when VC exceeded. |
| Cathode | Current exit terminal during clamping; marked with band | Connected to system ground or low-impedance return path; defines polarity and clamping reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free & RoHS-compliant | HM3 suffix confirms halogen-free molding compound and lead finish - required for automotive Tier 1 compliance. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, temperature cycling, and mechanical shock - suitable for engine control modules. |
| Low clamping ratio (VC/VBR) | 19.9 V / 13.3 V ≈ 1.49 - tight ratio minimizes overvoltage stress on protected ICs during surge events. |
| Fast response time | < 1 ns - enables suppression of ESD and fast-rising transients before damage occurs to CMOS inputs. |
| MSL Level 1 rating | Rated for peak reflow temperature of 260 °C - compatible with standard lead-free PCB assembly processes without prebaking. |
Applications
| Automotive Body Control Module (BCM) | Industrial CAN Transceiver Protection |
|---|---|
|
Use Scenario: Protecting LIN bus I/O pins in door module ECUs exposed to load dump and inductive kickback from window motor relays. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between LIN data line and chassis ground. Use Value: Limits transient voltage to ≤19.9 V during 100 V/50 ms load dump (ISO 7637-2 Pulse 5a), preventing latch-up in LIN transceivers. |
Use Scenario: Safeguarding RS-485/CAN FD transceiver I/O pins in factory automation PLCs subjected to cable discharge events. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (cathode-to-ground configuration) clamping common-mode surges on differential pairs. Use Value: Withstands 1000 W surges while maintaining <5 µA leakage at 12 V, preserving signal integrity and bus timing margins. |
| Automotive Camera Power Input | DC-DC Converter Feedback Path |
|
Use Scenario: Protecting 12 V input of image sensor power management ICs in ADAS cameras mounted near engine compartments. IC Role / Device Role / Timing Role: Primary front-end surge clamp on main power rail upstream of LDOs and buck converters. Use Value: Handles 100 A surge (IFSM) from alternator ripple and ignition noise, ensuring uninterrupted camera operation at TJ = 150 °C. |
Use Scenario: Shielding voltage feedback resistor divider network of automotive buck converter controlling LED headlamp brightness. IC Role / Device Role / Timing Role: Low-leakage (5 µA) shunt protector across FB pin and ground to prevent false regulation during ESD events. Use Value: Prevents output overvoltage caused by FB node disturbance, avoiding LED thermal runaway without affecting DC regulation accuracy. |
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 SMB package, identical VWM (12 V) and VC (19.9 V), but rated for 600 W PPPM (vs. 1000 W). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); insufficient for ISO 7637-2 Pulse 5a load dump. | Select when cost sensitivity outweighs surge margin and design operates below 600 W surge requirement. |
| 1.5SMC12AH | Higher-power SMC package (1500 W PPPM), same VWM/VC specs, but larger footprint (7.11 × 6.22 mm vs. SMB's 4.57 × 3.94 mm). | Requires PCB layout change; better suited for under-hood power modules where space permits and higher energy is expected. | Choose when system-level surge testing exceeds 1000 W or thermal dissipation demands lower RθJA than SMB allows. |
Compared with SMBJ12AHE3_A/H and 1.5SMC12AH, SMB10J12AHM3_A/H uniquely delivers 1000 W surge capability in the compact SMB footprint with halogen-free and AEC-Q101 assurance - optimizing space, reliability, and compliance for modern automotive signal-line protection.
Availability
SMB10J12AHM3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial fieldbus interfaces, and DC-DC converter feedback protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMB10J12AHM3_A/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, and protection devices with emphasis on automotive, industrial, and computing applications.
SMB10J12AHM3_A/H belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in space-constrained automotive and industrial systems.
FAQ
What is the clamping voltage of SMB10J12AHM3_A/H at its rated peak pulse current?
The SMB10J12AHM3_A/H has a maximum clamping voltage (VC) of 19.9 V at 50.3 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet revision 09-Jan-2024 and defines the upper voltage limit imposed on protected circuits during surge events. Maintaining VC below 20 V ensures compatibility with 12 V automotive ICs rated for ≤24 V absolute maximum ratings.
Is SMB10J12AHM3_A/H suitable for bidirectional signal line protection?
No - SMB10J12AHM3_A/H is a unidirectional TVS diode, intended for DC-biased lines like power rails or single-ended signals referenced to ground. For bidirectional protection (e.g., USB, RS-485), Vishay offers the SMB8J12CA variant with symmetrical breakdown. Using SMB10J12AHM3_A/H on AC-coupled or floating lines risks forward conduction during negative excursions, compromising protection integrity.
Does SMB10J12AHM3_A/H meet automotive qualification standards?
Yes - SMB10J12AHM3_A/H carries the HM3 suffix, confirming it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. This includes stress testing for high-temperature operating life, temperature cycling, and ESD (HBM ≥ 8 kV). The "_A/H" suffix denotes packaging in 7″ tape-and-reel with humidity level 1 rating, fully compliant with J-STD-020.
What is the thermal resistance from junction to ambient for SMB10J12AHM3_A/H?
The typical thermal resistance from junction to ambient (RθJA) for SMB10J12AHM3_A/H is 72 °C/W, measured on a 0.2″ × 0.2″ (5.0 mm × 5.0 mm) copper pad per terminal. This value assumes standard PCB layout per Vishay's recommended mounting pad dimensions. Effective heatsinking via larger copper areas or internal layers can reduce actual operating junction temperature during repetitive surge events.
How does the leakage current of SMB10J12AHM3_A/H affect low-power sensor circuits?
SMB10J12AHM3_A/H exhibits a maximum reverse leakage current (ID) of 5.0 µA at its 12 V stand-off voltage (VWM), measured at 25 °C. This low leakage avoids measurable loading on high-impedance sensor outputs (e.g., thermistor dividers or analog front-ends), preserving measurement accuracy and battery life in always-on automotive modules. Leakage remains below 50 µA even at 150 °C junction temperature.
SMB10J12AHM3_A/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:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for SMB10J12AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J12AHM3_A/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_A/H reliable?
The price and inventory of SMB10J12AHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for SMB10J12AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J12AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J12AHM3_A/H?
SMB10J12AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J12AHM3_A/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_A/H?
For technical support, including SMB10J12AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J12AHM3_A/H requirements.
6.How does Aetrix verify that SMB10J12AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB10J12AHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of SMB10J12AHM3_A/H?
All SMB10J12AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J12AHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for SMB10J12AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J12AHM3_A/H Tags
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