My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ12CAHE3_A/I
;;2.jpg)
- Part No.:
- SMBJ12CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ12CAHE3_A/I.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,836
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ12CAHE3_A/I 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 and 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 (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ12CAHE3_A/I datasheet, SMBJ12CAHE3_A/I pinout, SMBJ12CAHE3_A/I application, or SMBJ12CAHE3_A/I 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 validation.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical bidirectional conduction-no polarity marking required-and exhibits low incremental surge resistance for stable clamping under repetitive 10/1000 µs surges at 0.01% duty cycle. Its glass-passivated junction ensures consistent avalanche performance across temperature.
Designed for surface-mount assembly on standard PCB copper pads (0.2" × 0.2"), it meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak, and its 20 °C/W junction-to-lead thermal resistance supports localized heat dissipation during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V rail protection. |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - Confirmed breakdown threshold range ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM | 19.9 V at 30.2 A - Clamped voltage seen by protected circuit during 600 W transient; determines downstream component stress. |
| PPPM | 600 W (10/1000 µs) - Peak surge energy handling capacity; validates suitability for IEC 61000-4-5 Level 3/4 surge immunity. |
| ID @ VWM | 5.0 µA max - Low leakage ensures minimal standby power loss and signal integrity on high-impedance lines. |
| TJ Range | –55 °C to +150 °C - Enables deployment in automotive under-hood, industrial motor drives, and outdoor telecom enclosures. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive electronics per stress test requirements (HTOL, TC, AC/DC life tests). |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1, 260 °C reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current from either direction; connects to line under protection (e.g., RS-485 A/B, DC input). |
| Cathode | Transient current entry (bidirectional) | Completes low-impedance path to ground during clamping; ties to system ground plane with minimal inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN, RS-485) without polarity concerns. |
| 600 W peak pulse power | Supports robust IEC 61000-4-5 surge immunity up to 4 kV (line-earth) in properly laid-out PCBs with 0.2" copper pads. |
| AEC-Q101 qualification | Validates long-term reliability for automotive body control modules, infotainment interfaces, and ADAS sensor hubs. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs/ICs. |
| MSL Level 1 rating | Allows unlimited floor life and standard SMT reflow without baking, simplifying manufacturing for high-volume industrial OEMs. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate driver inputs and feedback signal lines against inductive switching spikes from BLDC motor controllers. IC Role / Device Role: Bidirectional TVS clamp limiting transient voltage to ≤19.9 V during 30 A surge events. Use Value: Prevents false triggering and latch-up in isolated gate drivers (e.g., Si823x) while maintaining signal fidelity at 10 kHz PWM frequencies. |
Use Scenario: Surge suppression on LIN bus lines exposed to load dump and jump-start conditions in door module ECUs. IC Role / Device Role: Primary transient suppressor placed within 2 mm of connector, referenced to chassis ground. Use Value: Maintains <5 µA leakage at 12 V to avoid LIN bias current errors, and withstands 150 °C under-hood ambient per AEC-Q101. |
| Telecom Power Supply Inputs | Consumer Sensor Interface Protection |
|
Use Scenario: Input-stage protection for 12 V DC-DC converters in PoE-powered access points subjected to lightning-induced surges. IC Role / Device Role: First-line clamping device upstream of input filter capacitor and primary FET. Use Value: Limits let-through voltage to <20 V during 600 W transients, preventing overvoltage failure of 25 V-rated input capacitors and controller ICs. |
Use Scenario: ESD and cable discharge protection for I²C lines connecting environmental sensors (temperature/humidity) to MCU in smart home hubs. IC Role / Device Role: Low-capacitance (<100 pF) bidirectional clamp on SDA/SCL, placed adjacent to connector. Use Value: Clamps ±8 kV contact ESD (IEC 61000-4-2) without distorting 400 kHz I²C timing, preserving communication integrity. |
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-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC specs, identical SMB package and pinout. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and full lifecycle traceability is not needed. |
| SAC12CA | Same 12 V VWM and bidirectional function but in SOD-123FL package; lower PPPM (400 W), higher VC (23.2 V at 20 A). | Smaller footprint but reduced surge handling; best for space-constrained consumer IoT nodes with lower threat levels. | Choose only if board area is critical and surge exposure is limited to IEC 61000-4-2 ESD-not full IEC 61000-4-5 surge. |
Compared with SMBJ12CAHE3_A/I, the SMBJ12CA-E3/52 offers identical electrical protection in commercial environments at lower cost, while SAC12CA trades surge robustness for miniaturization-making SMBJ12CAHE3_A/I the optimal choice for AEC-Q101–mandated or high-energy transient scenarios.
Availability
SMBJ12CAHE3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supply inputs, and consumer sensor interface protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMBJ12CAHE3_A/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-reliability transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where robustness against ESD, lightning, and inductive switching is non-negotiable.
FAQ
What is the clamping voltage of SMBJ12CAHE3_A/I at its rated peak pulse current?
The SMBJ12CAHE3_A/I has a maximum clamping voltage (VC) of 19.9 V at its rated peak pulse current (IPPM) of 30.2 A, measured under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a 600 W transient event and is confirmed in the Vishay datasheet revision 09-Jan-2024, page 2. The SMBJ12CAHE3_A/I maintains this clamping performance across its full operating temperature range.
Is SMBJ12CAHE3_A/I suitable for automotive applications?
Yes, SMBJ12CAHE3_A/I is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (page 3, footnote "(1) AEC-Q101 qualified"). This certification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing-validating its use in automotive body control modules, infotainment systems, and sensor interfaces. The HE3 suffix denotes RoHS-compliant and AEC-Q101–qualified construction.
What is the thermal resistance from junction to ambient for SMBJ12CAHE3_A/I?
The typical junction-to-ambient thermal resistance (RθJA) for SMBJ12CAHE3_A/I is 100 °C/W, measured under standard conditions using 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal (Vishay datasheet, page 3, Thermal Characteristics table). This value assumes minimum recommended PCB pad layout and is critical for estimating junction temperature rise during repetitive surge events or sustained power dissipation.
Does SMBJ12CAHE3_A/I have polarity markings on the package?
No, SMBJ12CAHE3_A/I does not have polarity markings because it is a bidirectional TVS diode. As confirmed in the Vishay datasheet (page 1, Mechanical Data section), "no marking on bidirectional types." Both terminals are functionally symmetric-anode and cathode behave identically-enabling flexible placement on differential or AC-coupled lines without orientation constraints.
What is the maximum reverse leakage current for SMBJ12CAHE3_A/I at its standoff voltage?
The maximum reverse leakage current (ID) for SMBJ12CAHE3_A/I is 5.0 µA at its 12 V standoff voltage (VWM), specified at TA = 25 °C (Vishay datasheet, page 2, Electrical Characteristics table). This low leakage preserves signal integrity on high-impedance sensor lines and minimizes quiescent power loss in battery-powered systems, directly supporting its use in precision analog and low-power IoT applications.
SMBJ12CAHE3_A/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:
- Obsolete
- 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_A/I FAQ
1.How can I place an order for SMBJ12CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ12CAHE3_A/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 SMBJ12CAHE3_A/I reliable?
The price and inventory of SMBJ12CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ12CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ12CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ12CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ12CAHE3_A/I?
SMBJ12CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ12CAHE3_A/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 SMBJ12CAHE3_A/I?
For technical support, including SMBJ12CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ12CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ12CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ12CAHE3_A/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 SMBJ12CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ12CAHE3_A/I?
All SMBJ12CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ12CAHE3_A/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 SMBJ12CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ12CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ12CAHE3_A/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
