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Vishay General Semiconductor - Diodes Division SMBJ12CHE3/52
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- Part No.:
- SMBJ12CHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ12CHE3/52.pdf
- Description:
- TVS DIODE 12VWM 22VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,722
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Product details
Overview
SMBJ12CHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive switching transients and ESD events. It features a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown range at 1 mA, 19.9 V maximum clamping voltage at 30.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the SMBJ12CHE3/52 datasheet, SMBJ12CHE3/52 pinout, SMBJ12CHE3/52 application, or SMBJ12CHE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates as a voltage-clamping protection device placed in parallel with sensitive circuit nodes. Its glass-passivated junction enables fast response time (<1 ns), low leakage (<5 µA at 12 V), and stable clamping under repetitive 10/1000 µs surges at 0.01% duty cycle.
The SMBJ12CHE3/52 is rated for 100 A non-repetitive forward surge current (8.3 ms half-sine), exhibits +0.083 %/°C temperature coefficient of VBR, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak - confirming suitability for high-reliability commercial and automotive applications requiring RoHS-compliant, halogen-free construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 12 V - maximum continuous reverse operating voltage before significant conduction begins |
| VBR (Breakdown Voltage) | 13.3–14.7 V at 1 mA - guaranteed conduction onset range for reliable overvoltage triggering |
| VC (Clamping Voltage) | 19.9 V at 30.2 A IPPM - limits downstream voltage during 600 W transient events |
| PPPM (Peak Pulse Power) | 600 W - energy-handling capacity for 10/1000 µs waveform per IEEE C62.35 |
| TJ max | +150 °C - enables operation in under-hood automotive and industrial ambient environments |
| Package | SMB (DO-214AA) - standardized 2-pin surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal requirement |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference node | Connected to ground or low-impedance return path during clamping |
| Cathode | Reverse-biased terminal / clamping output node | Connected to protected line; conducts when Vline exceeds VWM + dynamic margin |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 Level 4 surges without derating on standard pads |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain, body control, and ADAS modules requiring long-term field reliability |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without popcorn cracking or delamination risk |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V CAN/LIN bus interface circuits from load dump and inductive kickback in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before they reach transceiver ICs. Use Value: Prevents latch-up or permanent damage to NXP TJA1042 or ST TLE6250 transceivers during 12 V system switching events. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to relay coil flyback and motor contactor noise. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across optocoupler input pins to absorb >600 W surge energy within nanoseconds. Use Value: Maintains signal integrity and extends optocoupler lifetime by limiting peak reverse voltage to ≤19.9 V during 10/1000 µs surges. |
| Consumer Appliance Motor Drive Board | Telecom Power Supply Input Stage |
Use Scenario: Shielding microcontroller GPIOs and gate drivers from back-EMF spikes generated by brushed DC motors in washing machines. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to motor driver IC (e.g., ST L99H02) to minimize trace inductance during clamping. Use Value: Enables use of cost-effective 20 V-rated MOSFETs by holding drain-source voltage below 20 V during 30.2 A transient events. |
Use Scenario: Front-end protection of AC/DC power supplies in VoIP phones and base stations against lightning-induced surges on primary-side rectifier outputs. IC Role / Device Role / Timing Role: Secondary-stage TVS placed after bridge rectifier to suppress differential-mode transients before bulk capacitor filtering. Use Value: Reduces need for oversized input capacitors by limiting voltage overshoot to 19.9 V during 600 W surges, improving efficiency and footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12AHE3/52 | No AEC-Q101 qualification; same electrical specs and package | Restricted to commercial-grade systems without automotive reliability requirements | Select when AEC-Q101 is not mandated and cost optimization is prioritized |
| SMAJ12AHE3/A | Lower PPPM (400 W), SMA package (smaller thermal mass, higher RθJA) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Choose only for space-constrained designs where 400 W clamping suffices and thermal margin allows |
Compared with SMBJ12AHE3/52 and SMAJ12AHE3/A, the SMBJ12CHE3/52 uniquely combines AEC-Q101 validation, 600 W surge capability, and SMB thermal performance - making it the only option qualified for automotive under-hood deployment with full IEC 61000-4-5 compliance.
Availability
SMBJ12CHE3/52 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and consumer appliance motor control systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ12CHE3/52 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, precision, and application-specific optimization.
The SMBJ series targets high-energy transient suppression in harsh environments; the HE3 suffix denotes AEC-Q101 qualified, RoHS-compliant, and halogen-free construction for automotive and industrial use cases.
FAQ
What is the clamping voltage of SMBJ12CHE3/52 at its rated peak pulse current?
The SMBJ12CHE3/52 has a maximum clamping voltage (VC) of 19.9 V at 30.2 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and ensures protected downstream components experience no more than 19.9 V during worst-case transient events. The SMBJ12CHE3/52 maintains this clamping performance across its specified operating temperature range.
Is SMBJ12CHE3/52 suitable for automotive applications?
Yes, SMBJ12CHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD verification. The SMBJ12CHE3/52 is deployed in body control modules, lighting drivers, and infotainment interfaces where sustained reliability under thermal and electrical stress is mandatory.
How does the SMBJ12CHE3/52 differ from standard SMBJ12A variants?
The SMBJ12CHE3/52 differs from standard SMBJ12A by incorporating AEC-Q101 qualification, halogen-free construction, and RoHS compliance - all confirmed in Vishay's ordering code definition. Electrically identical, the HE3 variant adds automotive-grade process controls and extended reliability validation. The SMBJ12CHE3/52 is not interchangeable with non-HE3 versions in safety-critical automotive designs without requalification.
What is the thermal resistance of SMBJ12CHE3/52, and how does it affect layout?
The SMBJ12CHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under 5.0 W steady-state dissipation, designers must ensure adequate copper area and avoid thermal bottlenecks. The SMBJ12CHE3/52's RθJL of 20 °C/W supports efficient heat transfer to PCB planes.
Can SMBJ12CHE3/52 be used in bidirectional configurations?
No, SMBJ12CHE3/52 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SMBJ12CA). Using SMBJ12CHE3/52 in reverse-biased configurations beyond its specified 12 V stand-off will cause premature conduction and potential failure. Always match polarity and suffix to system topology - the SMBJ12CHE3/52 is strictly for unidirectional line-to-ground protection.
SMBJ12CHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 27.3A
- 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)
SMBJ12CHE3/52 FAQ
1.How can I place an order for SMBJ12CHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ12CHE3/52 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 SMBJ12CHE3/52 reliable?
The price and inventory of SMBJ12CHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ12CHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ12CHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ12CHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ12CHE3/52?
SMBJ12CHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ12CHE3/52 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 SMBJ12CHE3/52?
For technical support, including SMBJ12CHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ12CHE3/52 requirements.
6.How does Aetrix verify that SMBJ12CHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ12CHE3/52 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 SMBJ12CHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ12CHE3/52?
All SMBJ12CHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ12CHE3/52, 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 SMBJ12CHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ12CHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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