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Vishay General Semiconductor - Diodes Division SMBJ12CAHE3/52
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- Part No.:
- SMBJ12CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ12CAHE3/52.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,494
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Product details
Overview
SMBJ12CAHE3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features 12 V standoff 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, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ12CAHE3/52 datasheet, SMBJ12CAHE3/52 pinout, SMBJ12CAHE3/52 application, or SMBJ12CAHE3/52 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 bidirectional clamping behavior critical for ESD and surge protection design.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VC, and IPPM specifications in either direction. Its glass-passivated junction ensures stable leakage (<5.0 µA at VWM) and fast response time (<1 ns), enabling protection against ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
Designed for surface-mount assembly, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C), has matte tin-plated leads compliant with JESD 22-B102, and is qualified to AEC-Q101 for automotive-grade reliability - confirmed by HE3 suffix and Vishay's automotive ordering code structure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - guaranteed breakdown threshold range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 19.9 V at 30.2 A - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 600 W - peak pulse power handling capability; supports robust transient immunity without thermal runaway. |
| ID @ VWM | ≤5.0 µA - low reverse leakage at rated standoff voltage; minimizes standby power loss and signal distortion. |
| TJ Range | –55 °C to +150 °C - extended junction temperature range enables deployment in under-hood automotive and industrial environments. |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs board-level thermal design. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No cathode band; either terminal serves as anode or cathode depending on transient polarity - enables placement without orientation check. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports high-energy surge events common in industrial motor drives and telecom line interfaces without degradation. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including body control modules and infotainment power rails where reliability is mission-critical. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume automated assembly lines. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage over temperature and lifetime - critical for field-deployed systems. |
| UL 94 V-0 molding compound | Meets flammability safety requirements for end equipment certification in consumer, industrial, and telecom markets. |
Applications
| Industrial Motor Drive Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Suppresses inductive kickback from relay coils and solenoid drivers in PLC I/O modules and HVAC controllers. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across relay coil or MOSFET drain-source to limit voltage spikes to <20 V. Use Value: Prevents gate oxide damage to 20 V-rated logic-level MOSFETs and extends system uptime by eliminating transient-induced resets. |
Use Scenario: Protects LIN bus transceivers and microcontroller GPIOs from load dump and jump-start surges in door module ECUs. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between LIN line and ground, leveraging 12 V VWM alignment with vehicle battery nominal voltage. Use Value: Maintains signal integrity during 12 V system transients up to ±30 V while meeting AEC-Q101 stress test requirements. |
| Telecom Power Input Stage | Consumer Sensor Signal Line Protection |
|
Use Scenario: Shields 12 V DC input rails of PoE-powered network switches and base station radios from lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end TVS mounted before DC-DC converter input, absorbing >90% of 6 kV/3 kA IEC 61000-4-5 combination wave energy. Use Value: Enables compliance with EN 61000-4-5 Level 4 without additional series impedance or derating due to 19.9 V clamping ceiling. |
Use Scenario: Safeguards analog outputs of MEMS pressure sensors and temperature ICs in smart home hubs exposed to ESD during handling or cable insertion. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) bidirectional clamp on I²C or analog output lines, placed adjacent to connector. Use Value: Limits ESD stress to <20 V peak on sensitive 3.3 V rail interfaces while maintaining signal bandwidth via sub-ns response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA-M3/52 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No difference in circuit performance or layout; differs only in material composition per environmental compliance requirements. | Select when halogen-free bill-of-materials is mandated by OEM or regional regulatory policy. |
| SMAJ12CAHE3/A | Lower peak pulse power (400 W vs. 600 W); same VWM, VBR, and VC; SMA package (smaller footprint, higher RθJA). | Less robust for high-energy surges; suitable only where space constraints outweigh power handling needs. | Choose only if PCB real estate is severely limited and surge threat level is classified as low-to-moderate (e.g., internal signal lines). |
Compared with SMBJ12CAHE3/52, the M3/52 alternative offers identical protection performance with halogen-free construction, while the SMAJ12CAHE3/A trades 33% lower surge capacity and reduced thermal margin for 30% smaller board area - making SMBJ12CAHE3/52 optimal for high-reliability 12 V rail protection where space permits.
Availability
SMBJ12CAHE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power inputs, and consumer sensor interfaces requiring stable component supply across multi-year production cycles.
Supply support for SMBJ12CAHE3/52 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where AEC-Q101 qualification, 600 W surge handling, and bidirectional symmetry are mandatory.
FAQ
What is the clamping voltage of SMBJ12CAHE3/52 at its rated peak pulse current?
The SMBJ12CAHE3/52 clamps to a maximum of 19.9 V at its specified peak pulse current of 30.2 A (10/1000 µs waveform). This value is measured under standardized test conditions with 0.2" × 0.2" copper pads and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ12CAHE3/52 maintains this clamping performance across its full operating temperature range.
Is SMBJ12CAHE3/52 suitable for automotive applications?
Yes, SMBJ12CAHE3/52 is AEC-Q101 qualified, as confirmed by the HE3 suffix in its part number and Vishay's automotive ordering code documentation. It is rated for junction temperatures from –55 °C to +150 °C and meets MSL Level 1 reflow requirements - making it appropriate for under-hood and cabin-mounted automotive electronics such as BCMs and ADAS sensor interfaces. The SMBJ12CAHE3/52 also carries UL recognition for protector classification.
How does the bidirectional nature of SMBJ12CAHE3/52 affect PCB layout?
The SMBJ12CAHE3/52 has no polarity marking and functions identically in both directions, so PCB layout requires no orientation alignment - either terminal may connect to the line or ground side of the protected node. This simplifies automated placement and eliminates risk of reverse installation. The SMBJ12CAHE3/52's symmetrical behavior ensures consistent clamping regardless of transient polarity, which is essential for AC-coupled or floating signal lines.
What is the maximum leakage current of SMBJ12CAHE3/52 at its standoff voltage?
At its 12 V standoff voltage (VWM), the SMBJ12CAHE3/52 exhibits a maximum reverse leakage current of 5.0 µA at 25 °C, per Vishay's Electrical Characteristics table. This low leakage preserves signal integrity on high-impedance nodes and minimizes quiescent power loss in battery-operated systems. The SMBJ12CAHE3/52 maintains leakage below 10 µA across its full –55 °C to +125 °C operating range.
Does SMBJ12CAHE3/52 require a heatsink for standard operation?
No, SMBJ12CAHE3/52 is designed for operation without an external heatsink under typical surge duty cycles (0.01% duty cycle, 10/1000 µs waveform). Its thermal resistance is specified as RθJA = 100 °C/W on standard 0.2" × 0.2" copper pads - sufficient for transient dissipation. Continuous power dissipation is limited to 5.0 W, but SMBJ12CAHE3/52 is intended for short-duration surge events, not steady-state power handling.
SMBJ12CAHE3/52 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ12CAHE3/52 FAQ
1.How can I place an order for SMBJ12CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ12CAHE3/52 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 SMBJ12CAHE3/52 reliable?
The price and inventory of SMBJ12CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ12CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ12CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ12CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ12CAHE3/52?
SMBJ12CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ12CAHE3/52 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 SMBJ12CAHE3/52?
For technical support, including SMBJ12CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ12CAHE3/52 requirements.
6.How does Aetrix verify that SMBJ12CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ12CAHE3/52 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 SMBJ12CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ12CAHE3/52?
All SMBJ12CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ12CAHE3/52, 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 SMBJ12CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ12CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ12CAHE3/52 Tags
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