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Vishay General Semiconductor - Diodes Division SMBJ14AHM3_B/H
- Part No.:
- SMBJ14AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14AHM3_B/H.pdf
- Description:
- 600W,14V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,870
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Product details
Overview
SMBJ14AHM3_B/H 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 on power rails and signal lines. It features 14 V stand-off voltage (VWM), 23.2 V maximum clamping voltage (VC) at 25.9 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), deployed in automotive power supply protection and industrial sensor interface circuits.
For engineers reviewing the SMBJ14AHM3_B/H datasheet, SMBJ14AHM3_B/H pinout, SMBJ14AHM3_B/H application, or SMBJ14AHM3_B/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, clamping performance under standardized surge waveforms, and direct alternatives with documented differences in breakdown voltage tolerance and leakage behavior.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, leveraging a glass-passivated silicon junction to achieve fast response (<1 ns) and low incremental surge resistance. Its 15.6–17.2 V breakdown voltage range (VBR at 1 mA) ensures reliable triggering above nominal 14 V system rails while maintaining tight leakage (<1.0 µA at VWM).
Thermally, it exhibits RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling effective heat dissipation when mounted on 5.0 mm × 5.0 mm copper pads per JEDEC standards. The device is halogen-free, RoHS-compliant, and qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail margin for 12 V automotive systems. |
| VBR min/max | 15.6 V / 17.2 V - Breakdown voltage range at 1 mA test current; ensures consistent turn-on across temperature and process variation. |
| VC @ IPPM | 23.2 V at 25.9 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress below 24 V logic or MOSFET gate thresholds. |
| PPPM | 600 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity without failure. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at rated stand-off; minimizes quiescent power loss in battery-powered sensor nodes. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.21 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, MSL Level 1 (260 °C peak reflow), UL 94 V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection point for unidirectional clamping | Connected to protected line (e.g., 12 V rail); conducts surge current toward ground when voltage exceeds VBR. |
| Anode | Low-side reference terminal | Connected to system ground or return path; completes clamping loop and establishes reference for breakdown threshold. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Withstands repetitive surges up to 0.01% duty cycle without degradation-critical for automotive load-dump immunity. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics, with extended temperature cycling and humidity testing. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets EU environmental directives and JESD201 Class 2 whisker resistance, supporting green manufacturing and long-term reliability. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage overshoot during transients-protects 24 V-rated components even when VBR is at upper spec limit (17.2 V). |
| Fast response time (<1 ns) | Clamps ESD events (IEC 61000-4-2) before sensitive CMOS inputs are damaged, preserving signal integrity in high-speed interfaces. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against ISO 7637-2 load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤23.2 V, preventing damage to 28 V-rated input capacitors and controller ICs. |
Use Scenario: Shielding analog outputs of pressure sensors from ESD coupling on 4–20 mA current loops. IC Role / Device Role / Timing Role: Low-leakage TVS connected across sensor output and ground to shunt fast transients. Use Value: Maintains <1.0 µA leakage at 14 V, avoiding offset errors in precision current-loop DACs and amplifiers. |
| Telecom DC Power Input Stage | Consumer Device USB Port Surge Guard |
Use Scenario: Safeguarding PoE-powered network switches against induced lightning surges on 48 V DC input. IC Role / Device Role / Timing Role: Primary clamping device upstream of hot-swap controller and bulk capacitor. Use Value: Absorbs 600 W pulses without thermal runaway, validated for repeated 10/1000 µs surges per IEC 61000-4-5. |
Use Scenario: Adding secondary-level surge protection to USB-C power delivery paths in portable monitors. IC Role / Device Role / Timing Role: Unidirectional TVS on VBUS line, coordinated with primary fuse and overvoltage detector. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) within 1 ns, preventing latch-up in USB PD controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14AHE3_B/H | Same VWM (14 V), VBR (15.6–17.2 V), and VC (23.2 V), but RoHS-compliant commercial grade (non-AEC-Q101). | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select SMBJ14AHE3_B/H when cost sensitivity outweighs automotive reliability requirements. |
| SMBJ14CAHM3_B/H | Bidirectional variant with identical VWM (14 V) and VC (23.2 V), but symmetrical clamping in both polarities. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where reverse polarity surges occur. | Choose SMBJ14CAHM3_B/H only when bidirectional protection is explicitly needed-unidirectional SMBJ14AHM3_B/H offers lower leakage. |
Compared with SMBJ14AHE3_B/H, SMBJ14AHM3_B/H adds AEC-Q101 qualification and halogen-free construction; compared with SMBJ14CAHM3_B/H, it provides tighter reverse leakage (<1.0 µA vs. ≤2.0 µA for bidirectional types) and eliminates unnecessary bidirectional conduction in DC rail applications.
Availability
SMBJ14AHM3_B/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom DC input protection requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ14AHM3_B/H 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 targets robust transient suppression in harsh environments, with variants engineered for automotive (AEC-Q101), industrial, and telecom applications where precise clamping, low leakage, and high surge endurance are critical.
FAQ
What is the maximum clamping voltage of SMBJ14AHM3_B/H under a 10/1000 µs surge?
The SMBJ14AHM3_B/H has a maximum clamping voltage (VC) of 23.2 V at 25.9 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is guaranteed across temperature and process variation, ensuring predictable overvoltage limiting for downstream 24 V-rated components in automotive and industrial systems.
Is SMBJ14AHM3_B/H qualified for automotive applications?
Yes, SMBJ14AHM3_B/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet revision 09-Jan-2024. It undergoes rigorous stress testing-including temperature cycling, humidity bias, and mechanical shock-to meet automotive electronic module reliability requirements.
How does the leakage current of SMBJ14AHM3_B/H compare to bidirectional variants?
SMBJ14AHM3_B/H specifies ≤1.0 µA maximum reverse leakage (ID) at its 14 V stand-off voltage (VWM), whereas bidirectional equivalents like SMBJ14CAHM3_B/H exhibit ≤2.0 µA due to dual-junction architecture. This lower leakage makes SMBJ14AHM3_B/H preferable for battery-sensitive applications such as always-on sensor nodes.
What is the thermal resistance from junction to ambient for SMBJ14AHM3_B/H?
The typical thermal resistance from junction to ambient (RθJA) for SMBJ14AHM3_B/H is 100 °C/W when mounted on the minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). This value assumes standard FR-4 PCB with no additional heatsinking and guides thermal design for sustained surge duty cycles.
Does SMBJ14AHM3_B/H have halogen-free construction?
Yes, the "HM3" suffix in SMBJ14AHM3_B/H explicitly denotes halogen-free, RoHS-compliant construction per Vishay's material categorization. The molding compound meets UL 94 V-0 flammability rating, and terminals are matte tin-plated to J-STD-002 and JESD 22-B102 solderability standards.
SMBJ14AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 25.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ14AHM3_B/H FAQ
1.How can I place an order for SMBJ14AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14AHM3_B/H 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 SMBJ14AHM3_B/H reliable?
The price and inventory of SMBJ14AHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ14AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14AHM3_B/H?
SMBJ14AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14AHM3_B/H 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 SMBJ14AHM3_B/H?
For technical support, including SMBJ14AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ14AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ14AHM3_B/H 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 SMBJ14AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ14AHM3_B/H?
All SMBJ14AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14AHM3_B/H, 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 SMBJ14AHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ14AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14AHM3_B/H Tags
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