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Vishay General Semiconductor - Diodes Division SMBJ12AHE3/52
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- Part No.:
- SMBJ12AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ12AHE3/52.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,250
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Product details
Overview
SMBJ12AHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power 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 maximum clamping voltage (VC) at 30.2 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ12AHE3/52 datasheet, SMBJ12AHE3/52 pinout, SMBJ12AHE3/52 application, or SMBJ12AHE3/52 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and polarity marking (cathode band), supporting robust ESD and surge protection design validation.
Technical Context
This TVS diode operates as a unidirectional clamping device, conducting only in reverse bias above its breakdown threshold to divert transient energy to ground. Its glass-passivated junction ensures stable leakage (<5.0 µA at VWM) and fast response time (<1.0 ns), critical for protecting sensitive CMOS inputs and low-voltage logic rails.
The SMBJ12AHE3/52 is rated for 600 W peak pulse power under 10/1000 µs waveform with 0.01 % duty cycle, and supports 100 A non-repetitive forward surge current (IFSM) for inductive load switching events. Its MSL Level 1 moisture sensitivity and matte tin-plated leads comply with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 12 V - Maximum continuous reverse voltage before significant conduction begins; sets operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 13.3–14.7 V at 1.0 mA - Confirmed minimum/maximum reverse breakdown range; defines precise turn-on threshold for transient suppression. |
| VC (Clamping Voltage) | 19.9 V at IPPM = 30.2 A - Measured voltage across device during 10/1000 µs surge; determines protected circuit's maximum stress level. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy handling capability under standardized waveform; enables IEC 61000-4-5 Level 4 compliance when properly mounted. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in high-ambient environments such as automotive engine control units and industrial motor drives. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs PCB thermal layout requirements for sustained power dissipation. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing; suitable for under-hood and ADAS sensor protection. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads. Cathode identified by a single band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to protected line (e.g., VCC rail or signal trace); forms clamping path to ground via cathode when transient exceeds VBR. |
| Cathode | Clamping output / Ground reference | Connected to system ground or low-impedance return path; carries full surge current during transient events; marked with visible band. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W Peak Pulse Power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 surges up to 4 kV without derating on standard PCB layouts. |
| AEC-Q101 Qualified | Validated for automotive electronics including infotainment, body control modules, and sensor interfaces requiring long-term reliability. |
| Low Incremental Surge Resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns response), preserving voltage margins of 3.3 V and 5 V logic. |
| MSL Level 1, 260 °C Reflow Compatible | Supports standard lead-free reflow assembly without pre-baking; eliminates moisture-related popcorning risk. |
| Glass-Passivated Junction | Ensures stable leakage current (<5 µA at 12 V) over temperature and lifetime, critical for battery-powered and always-on systems. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between driver output and ground to limit voltage spikes to <20 V during turn-off. Use Value: Prevents latch-up and permanent damage to 3.3 V/5 V MCU GPIOs and half-bridge drivers exposed to >100 V transients. |
Use Scenario: Input protection for LIN bus transceivers and door module sensors subjected to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-clamp TVS on 12 V supply rail upstream of LDO regulators to suppress 40 V/200 ms load dump events. Use Value: Maintains regulator input within safe operating area while meeting ISO 7637-2 Pulse 5a requirements without additional filtering. |
| Consumer Power Adapters | Industrial PLC Digital Inputs |
Use Scenario: Secondary-side overvoltage suppression on USB-C PD adapter outputs during fault conditions. IC Role / Device Role / Timing Role: Clamping diode across 5–20 V output rails to limit transient excursions during short-circuit recovery or controller failure. Use Value: Limits output overshoot to <25 V during 10/1000 µs surges, preventing damage to connected devices and satisfying UL 62368-1 transient immunity. |
Use Scenario: Protection of 24 V DC digital input circuits in programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Series-connected TVS on input line to clamp transients before optocoupler input stage. Use Value: Ensures reliable detection of 24 V logic states even after repeated exposure to 1 kV/500 A surges per IEC 61000-4-4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A-E3/52 | Commercial-grade (non-AEC-Q101), identical electrical specs and SMB package. | Lacks automotive qualification; suitable for consumer and industrial applications where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and no vehicle deployment is planned. |
| SAC12 | Same VWM (12 V) and VC (20 V), but in smaller SOD-123FL package; lower PPPM (400 W) and IPPM (20 A). | Lower surge capacity limits use to low-energy signal-line protection (e.g., UART, I²C), not power rail clamping. | Choose only for space-constrained signal-level protection where 600 W rating is unnecessary. |
Compared with SMBJ12AHE3/52, the SMBJ12A-E3/52 offers identical clamping performance at lower cost but excludes automotive qualification, while SAC12 trades surge robustness for footprint reduction - making SMBJ12AHE3/52 the optimal choice for AEC-Q101-compliant 24 V system rail protection.
Availability
SMBJ12AHE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and consumer power adapters requiring stable component supply with guaranteed AEC-Q101 qualification and full traceability.
Supply support for SMBJ12AHE3/52 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 SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where robustness against ESD, lightning, and inductive switching is mission-critical.
FAQ
What is the clamping voltage of SMBJ12AHE3/52 at its rated peak pulse current?
The SMBJ12AHE3/52 has a maximum clamping voltage (VC) of 19.9 V when subjected to its rated peak pulse current (IPPM) of 30.2 A under the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ12AHE3/52 maintains this clamping performance across its qualified temperature range and meets AEC-Q101 stress test requirements.
Is SMBJ12AHE3/52 suitable for automotive applications?
Yes, SMBJ12AHE3/52 is AEC-Q101 qualified, with validation across temperature cycling, highly accelerated life testing (HALT), and ESD robustness per JESD22-A114. Its construction - including glass-passivated junction, matte tin-plated leads, and MSL Level 1 rating - supports under-hood and chassis-mounted deployments. The SMBJ12AHE3/52 is explicitly designated for automotive use in Vishay's ordering nomenclature (HE3 suffix).
How does the SMBJ12AHE3/52 differ from bidirectional variants like SMBJ12CA?
The SMBJ12AHE3/52 is unidirectional, with polarity marked by a cathode band and intended for DC rail protection where reverse conduction must be blocked. In contrast, SMBJ12CA is bidirectional, symmetric in both directions, and used for AC line or differential signal protection. Their VBR and VC values differ: SMBJ12AHE3/52 has VBR = 13.3–14.7 V and VC = 19.9 V, while SMBJ12CA has higher VBR (≈15.0–16.6 V) and VC (≈23.2 V). The SMBJ12AHE3/52 cannot substitute for SMBJ12CA in AC-coupled paths.
What is the thermal resistance and recommended pad layout for SMBJ12AHE3/52?
The SMBJ12AHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay document 88392. To achieve this rating, designers must implement minimum recommended pad dimensions and avoid excessive thermal isolation. The SMBJ12AHE3/52 also exhibits RθJL = 20 °C/W, enabling effective heat transfer to PCB copper when ground planes are used.
Does SMBJ12AHE3/52 meet RoHS and halogen-free requirements?
Yes, SMBJ12AHE3/52 is RoHS-compliant and AEC-Q101 qualified, with the "HE3" suffix indicating compliance per Vishay's material categorization (document 99912). It contains no restricted substances per EU Directive 2011/65/EU and is halogen-free - defined as <900 ppm bromine and <900 ppm chlorine, with total halogens ≤1500 ppm. This makes the SMBJ12AHE3/52 suitable for environmentally regulated markets including automotive and industrial equipment.
SMBJ12AHE3/52 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):
- 30.2A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ12AHE3/52 FAQ
1.How can I place an order for SMBJ12AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ12AHE3/52 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 SMBJ12AHE3/52 reliable?
The price and inventory of SMBJ12AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ12AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ12AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ12AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ12AHE3/52?
SMBJ12AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ12AHE3/52 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 SMBJ12AHE3/52?
For technical support, including SMBJ12AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ12AHE3/52 requirements.
6.How does Aetrix verify that SMBJ12AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ12AHE3/52 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 SMBJ12AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ12AHE3/52?
All SMBJ12AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ12AHE3/52, 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 SMBJ12AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ12AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ12AHE3/52 Tags
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