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Vishay General Semiconductor - Diodes Division SMBJ14A-M3/5B
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- Part No.:
- SMBJ14A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14A-M3/5B.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,316
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Product details
Overview
SMBJ14A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 14 V stand-off voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 1 mA, and clamps transients up to 23.2 V at 25.9 A peak pulse current (IPPM) under 10/1000 µs waveform - deployed on power rails and signal lines of industrial sensors and automotive ECUs.
For engineers reviewing the SMBJ14A-M3/5B datasheet, SMBJ14A-M3/5B pinout, SMBJ14A-M3/5B application, or SMBJ14A-M3/5B equivalent, this page delivers verified electrical specs, thermal derating behavior, clamping performance, polarity marking, and AEC-Q101 qualification status - all critical for ESD/surge protection design-in and BOM validation.
Technical Context
This TVS operates as a unidirectional avalanche diode with cathode-band polarity marking, optimized for fast response (<1 ps) to transient events such as inductive switching spikes and lightning-induced surges. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the 600 W peak pulse power rating (10/1000 µs) supports repetitive surge handling at 0.01% duty cycle.
Thermal performance is defined by RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling reliable operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and is halogen-free, RoHS-compliant (M3 suffix), with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before significant conduction begins; sets upper limit for normal circuit operation. |
| VBR (min/max) | 15.6 V / 17.2 V at IT = 1 mA - guaranteed avalanche onset range; defines minimum clamping threshold under surge conditions. |
| VC @ IPPM | 23.2 V at 25.9 A (10/1000 µs) - maximum clamped voltage seen by protected circuit; determines worst-case stress on downstream components. |
| PPPM | 600 W - peak transient energy absorption capability; enables protection against IEC 61000-4-5 Level 4 surges when properly mounted. |
| IFSM | 100 A (8.3 ms half-sine) - surge current withstand without failure; validates robustness against power-line fault transients. |
| TJ max. | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode band marking on one end. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-impedance reference; completes clamping loop during positive transients. |
| Cathode | Reverse-biased terminal / protected line connection | Connected to the line being protected (e.g., 12 V rail or sensor output); conducts only during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive applications. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage in MOSFETs and microcontrollers. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance mandates for global OEMs and supports lead-free reflow profiles up to 260 °C peak. |
| AEC-Q101 qualified option available | Validated for automotive-grade reliability including HTOL, TC, and ESD testing - critical for engine control and ADAS subsystems. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life before reflow; eliminates baking requirement and simplifies SMT manufacturing flow. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp positive surges above 14 V. Use Value: Limits transient voltage to ≤23.2 V, preventing damage to LDO regulators and CAN transceivers downstream. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across signal and ground to absorb sub-ns ESD pulses without distorting millivolt-level signals. Use Value: Maintains signal integrity with <1.0 µA leakage at 14 V, avoiding DC offset errors in precision measurement circuits. |
| Telecom DC Power Input Protection | Consumer Device USB Port Surge Suppression |
|
Use Scenario: Safeguarding PoE-powered network switches against induced surges on 48 V DC inputs. IC Role / Device Role / Timing Role: Primary TVS stage upstream of DC-DC converters, absorbing multi-kW transients per IEC 61000-4-5. Use Value: Withstands 100 A non-repetitive forward surge (8.3 ms), ensuring survival during sustained overcurrent faults. |
Use Scenario: Adding secondary surge protection on USB VBUS lines in portable chargers and docking stations. IC Role / Device Role / Timing Role: Fast-response TVS placed after primary fuse, clamping hot-plug and ESD events before reaching USB controller ICs. Use Value: Achieves <1 ps response time and 23.2 V clamping, keeping USB 2.0 data lines within ±0.3 V tolerance during transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14A-E3/5B | Same electrical specs and SMB package, but RoHS-compliant commercial grade (E3) without halogen-free certification. | Approved for general industrial use; not qualified for automotive or high-reliability halogen-free mandates. | Select when halogen-free compliance is not required and cost optimization is prioritized. |
| SMBJ14CA-M3/5B | Bidirectional variant with symmetric breakdown (±15.6–17.2 V); same VC, PPPM, and package. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN bus) where negative transients must also be clamped. | Choose only when protecting bidirectional interfaces; unidirectional SMBJ14A-M3/5B is more efficient for DC rails. |
Compared with SMBJ14A-E3/5B, the M3 version adds halogen-free compliance for stricter environmental programs; compared with SMBJ14CA-M3/5B, the unidirectional SMBJ14A-M3/5B offers lower leakage and avoids unnecessary complexity on single-polarity lines.
Availability
SMBJ14A-M3/5B is available at Aetrix Electronics and suitable for automotive ECU designs, industrial sensor modules, telecom power supplies, and consumer USB protection circuits requiring stable component supply and full traceability.
Supply support for SMBJ14A-M3/5B 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 performance.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness, fast response, and long-term stability are non-negotiable.
FAQ
What is the clamping voltage of SMBJ14A-M3/5B at its rated peak pulse current?
The SMBJ14A-M3/5B clamps to a maximum of 23.2 V at its specified peak pulse current of 25.9 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and reflects worst-case voltage stress imposed on protected circuitry during surge events - a key parameter for validating margin against downstream IC absolute maximum ratings.
Is SMBJ14A-M3/5B suitable for automotive applications?
SMBJ14A-M3/5B itself is halogen-free and RoHS-compliant but not AEC-Q101 qualified. However, Vishay offers the functionally identical SMBJ14A-HM3_X variant (e.g., SMBJ14A-HM3_B/I) which carries full AEC-Q101 qualification. For automotive use, confirm ordering code suffix "HM3" and revision "_X" to ensure qualification coverage.
How does the M3 suffix differ from E3 in SMBJ14A-M3/5B?
The M3 suffix denotes halogen-free, RoHS-compliant construction meeting IEC 61249-2-21 standards, whereas E3 indicates RoHS-compliant but not halogen-free. Both share identical electrical performance and SMB package dimensions, but M3 is mandated for products targeting EU EcoDesign, Japan J-Moss, or other halogen-restricted markets.
What is the thermal resistance of SMBJ14A-M3/5B, and how does it affect layout?
SMBJ14A-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended copper pads (0.2" × 0.2"). To maintain TJ ≤ 150 °C at full 5.0 W steady-state dissipation, PCB layout must include adequate copper area and avoid thermal bottlenecks - especially critical in enclosed automotive enclosures.
Can SMBJ14A-M3/5B replace SMBJ14CA-M3/5B in a circuit?
No - SMBJ14A-M3/5B is unidirectional and only protects against positive transients relative to ground, while SMBJ14CA-M3/5B is bidirectional and clamps both polarities. Substituting SMBJ14A-M3/5B for SMBJ14CA-M3/5B on AC or differential lines (e.g., CAN, RS-485) leaves negative transients unclamped and risks component failure.
SMBJ14A-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.5V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 25.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ14A-M3/5B FAQ
1.How can I place an order for SMBJ14A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14A-M3/5B 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 SMBJ14A-M3/5B reliable?
The price and inventory of SMBJ14A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ14A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14A-M3/5B?
SMBJ14A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14A-M3/5B 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 SMBJ14A-M3/5B?
For technical support, including SMBJ14A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14A-M3/5B requirements.
6.How does Aetrix verify that SMBJ14A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ14A-M3/5B 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 SMBJ14A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ14A-M3/5B?
All SMBJ14A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14A-M3/5B, 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 SMBJ14A-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ14A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14A-M3/5B Tags
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