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Vishay General Semiconductor - Diodes Division SMBJ14AHE3_B/I
- Part No.:
- SMBJ14AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14AHE3_B/I.pdf
- Description:
- 600W,14V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,179
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Product details
Overview
SMBJ14AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed to protect sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. It features a 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), commonly deployed on power rails and I/O lines of industrial sensor interfaces.
For engineers reviewing the SMBJ14AHE3_B/I datasheet, SMBJ14AHE3_B/I pinout, SMBJ14AHE3_B/I application, or SMBJ14AHE3_B/I equivalent, key selection criteria include its AEC-Q101 qualification status, low clamping ratio (VC/VWM = 1.66), unidirectional polarity with cathode band marking, and compatibility with automated SMT assembly on standard PCB pad layouts per JEDEC DO-214AA.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ at 14 V), but triggers into low-impedance conduction when reverse voltage exceeds its 15.6–17.2 V breakdown range (VBR at 1 mA). Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns).
The device is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports continuous power dissipation of 5.0 W at 50 °C ambient, and exhibits a thermal resistance of 100 °C/W (junction-to-ambient) on standard 5.0 mm × 5.0 mm copper pads - critical for thermal design in compact industrial modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 15.6–17.2 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system nominal rail. |
| VC (Clamping Voltage) | 23.2 V at 25.9 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 600 W - Surge energy handling capacity under standardized 10/1000 µs waveform; validates protection level for IEC 61000-4-5 Level 4. |
| IPPM (Peak Pulse Current) | 25.9 A - Maximum transient current the device safely diverts without degradation; derived directly from VC and PPPM. |
| TJmax | 150 °C - Maximum junction temperature; enables operation in automotive engine bay or industrial enclosures without derating below 125 °C ambient. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing; required for under-hood and ADAS sensor protection. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1 (260 °C reflow peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when reverse voltage exceeds VBR; polarity must match system grounding scheme. |
| Anode | Reference/ground return path | Typically tied to system ground plane; forms low-inductance return path essential for effective clamping performance. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates robust protection against IEC 61000-4-5 surge events up to 4 kV (line-earth) in industrial control systems. |
| Low clamping ratio (VC/VWM = 1.66) | Minimizes overvoltage stress on downstream ICs such as RS-485 transceivers or microcontroller GPIOs during transient events. |
| AEC-Q101 qualified (HE3 suffix) | Enables direct use in automotive applications like body control modules and sensor signal conditioning without additional qualification effort. |
| Glass passivated junction | Ensures stable, repeatable avalanche characteristics over lifetime and temperature, critical for long-term field reliability. |
| MSL Level 1 moisture sensitivity | Eliminates bake-out requirement prior to reflow; supports standard SMT assembly without process modification. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Power Rail |
|---|---|
|
Use Scenario: Protecting 12 V supply inputs of analog sensor signal conditioners (e.g., pressure, temperature) exposed to load-dump and jump-start transients in factory automation equipment. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VIN and GND, clamping surges before they reach LDO regulators and ADC front-ends. Use Value: Limits voltage excursion to ≤23.2 V during 25.9 A transients, preventing latch-up or permanent damage to 3.3 V/5 V logic components downstream. |
Use Scenario: Safeguarding 12 V battery-fed power rails in BCMs subjected to ISO 7637-2 Pulse 5a (load dump) and ESD events per ISO 10605. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main input rail, coordinated with upstream fuses and secondary TVS devices on sub-circuits. Use Value: AEC-Q101 qualification and 150 °C TJmax ensure uninterrupted operation in under-dash environments where ambient reaches 105 °C. |
| RS-485 Communication Line Protection | Consumer Appliance Motor Drive Power Stage |
|
Use Scenario: Bidirectional protection of RS-485 differential pairs (A/B lines) in building automation controllers, using dual unidirectional SMBJ14AHE3_B/I devices in back-to-back configuration. IC Role / Device Role / Timing Role: Fast-response voltage clamp limiting common-mode transients to <25 V, preserving signal integrity and transceiver survival. Use Value: Sub-1 ns response time and 23.2 V clamping prevent receiver input stage breakdown during 4 kV EFT bursts per IEC 61000-4-4. |
Use Scenario: Suppressing inductive kickback from brushed DC motor commutation in smart home appliances (e.g., washing machine drive boards). IC Role / Device Role / Timing Role: Freewheeling path for flyback energy during MOSFET turn-off, reducing voltage spikes across switching FETs. Use Value: 600 W peak power rating handles repetitive 10/1000 µs surges from motor inductance, extending MOSFET lifetime and reducing EMI emissions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14AHM3_B/I | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | No functional difference; selected when halogen-free compliance is mandated by OEM environmental policies (e.g., EU auto Tier 1). | Choose SMBJ14AHM3_B/I if RoHS + halogen-free certification is contractually required; otherwise SMBJ14AHE3_B/I suffices. |
| SMBJ14A-E3/5B | Commercial-grade (non-AEC-Q101), same VWM/VC/PPPM, but rated only for -55 °C to +150 °C without automotive stress validation. | Suitable for cost-sensitive industrial or consumer applications where automotive reliability testing is not required. | Select SMBJ14A-E3/5B for non-automotive designs needing identical clamping performance at lower cost and without AEC-Q101 overhead. |
Compared with SMBJ14AHM3_B/I, the SMBJ14AHE3_B/I offers identical surge performance but lacks halogen-free documentation; versus SMBJ14A-E3/5B, it adds AEC-Q101 validation critical for automotive deployment - making SMBJ14AHE3_B/I the only choice when both automotive qualification and standard RoHS compliance are mandatory.
Availability
SMBJ14AHE3_B/I is available at Aetrix Electronics and suitable for industrial sensor interface protection, automotive body control module power rail hardening, and RS-485 communication line safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMBJ14AHE3_B/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial, and telecom infrastructure where consistent clamping and long-term stability are non-negotiable.
FAQ
What is the clamping voltage of SMBJ14AHE3_B/I at its rated peak pulse current?
The SMBJ14AHE3_B/I has a maximum clamping voltage (VC) of 23.2 V at 25.9 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuits during surge events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings. The SMBJ14AHE3_B/I maintains this clamping performance across its full operating temperature range.
Is SMBJ14AHE3_B/I suitable for automotive applications?
Yes, SMBJ14AHE3_B/I is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD verification per automotive standards. Its 150 °C maximum junction temperature and validated reliability make it appropriate for under-hood and cabin-mounted automotive systems such as body control modules, sensor interfaces, and infotainment power supplies - unlike commercial-grade variants that lack this qualification.
What does the "HE3" suffix indicate in SMBJ14AHE3_B/I?
The "HE3" suffix in SMBJ14AHE3_B/I denotes a RoHS-compliant, AEC-Q101 qualified version with standard tin plating - distinguishing it from "E3" (RoHS-compliant, commercial grade), "HM3" (halogen-free + AEC-Q101), and "M3" (halogen-free, commercial). The "HE3" designation confirms both environmental compliance and automotive-grade reliability validation, making SMBJ14AHE3_B/I suitable for Tier 1 automotive supply chains requiring documented qualification evidence.
How does SMBJ14AHE3_B/I differ from bidirectional TVS diodes like SMBJ14CA?
SMBJ14AHE3_B/I is unidirectional and features a cathode band for polarity identification, enabling use in DC-biased circuits where reverse conduction must be blocked. In contrast, SMBJ14CA is bidirectional with no polarity marking and symmetrical clamping in both directions - suited for AC or differential signal lines. The SMBJ14AHE3_B/I's unidirectional behavior prevents unintended conduction during normal forward bias, which is essential in power rail protection where reverse leakage could disrupt system operation.
What PCB pad layout is recommended for optimal thermal performance of SMBJ14AHE3_B/I?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area per terminal for SMBJ14AHE3_B/I to achieve its rated 100 °C/W junction-to-ambient thermal resistance. Using smaller pads increases thermal impedance, causing higher junction temperatures during sustained power dissipation or repetitive surges. For high-reliability applications, connecting pads to internal ground/power planes via multiple thermal vias further improves heat spreading and ensures SMBJ14AHE3_B/I remains within its 150 °C TJmax limit.
SMBJ14AHE3_B/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:
- 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)
SMBJ14AHE3_B/I FAQ
1.How can I place an order for SMBJ14AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14AHE3_B/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 SMBJ14AHE3_B/I reliable?
The price and inventory of SMBJ14AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14AHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ14AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14AHE3_B/I?
SMBJ14AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14AHE3_B/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 SMBJ14AHE3_B/I?
For technical support, including SMBJ14AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14AHE3_B/I requirements.
6.How does Aetrix verify that SMBJ14AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ14AHE3_B/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 SMBJ14AHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ14AHE3_B/I?
All SMBJ14AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14AHE3_B/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 SMBJ14AHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ14AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14AHE3_B/I Tags
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