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Vishay General Semiconductor - Diodes Division SMBJ22AHE3_B/H
- Part No.:
- SMBJ22AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22AHE3_B/H.pdf
- Description:
- 600W,22V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,081
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Product details
Overview
SMBJ22AHE3_B/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 22 V standoff voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 35.5 V clamping voltage (VC) at 16.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed to safeguard MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD in industrial and automotive electronics.
For engineers reviewing the SMBJ22AHE3_B/H datasheet, SMBJ22AHE3_B/H pinout, SMBJ22AHE3_B/H application, or SMBJ22AHE3_B/H equivalent, this AEC-Q101 qualified TVS offers validated surge immunity, low clamping ratio (VC/VBR ≈ 1.42), and MSL Level 1 reflow compatibility - critical for high-reliability board-level protection design and automotive-grade BOM consolidation.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt device triggered above its reverse standoff threshold. Its glass-passivated junction ensures stable avalanche behavior under repetitive 10/1000 µs surges up to 600 W, with thermal resistance RθJA = 100 °C/W enabling operation up to +150 °C junction temperature.
The SMBJ22AHE3_B/H uses a single-junction planar construction with cathode-band polarity marking, optimized for automated placement on SMB (DO-214AA) footprint. Its 0.096 %/°C VBR temperature coefficient ensures predictable breakdown drift across automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold |
| VBR @ IT = 1 mA | 24.4–26.9 V - verified avalanche onset range ensuring consistent turn-on across production lots |
| VC @ IPPM = 16.9 A | 35.5 V - clamped voltage during 10/1000 µs surge; limits downstream stress to ≤35.5 V under rated 600 W pulse |
| PPPM | 600 W - peak pulse power handling per JEDEC standard waveform; supports IEC 61000-4-5 Level 4 surge immunity |
| IFSM | 100 A - 8.3 ms half-sine surge rating for unidirectional devices; protects against power-rail fault currents |
| Junction Temp Range | −55 °C to +150 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal relief per datasheet layout |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, compliant with J-STD-002 solderability and JESD 22-B102 whisker testing. Cathode identified by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference | Connected to circuit ground or low-voltage rail; completes shunt path during reverse overvoltage events |
| Cathode | Avalanche clamping terminal / protected line interface | Connected to protected line (e.g., 24 V supply or sensor output); conducts when VKA exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges (1.2/50 µs voltage, 8/20 µs current) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in downstream ICs |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture sensitivity concerns or pre-bake requirements |
| Glass passivated junction | Ensures stable leakage (<1 µA at VWM) and repeatable breakdown characteristics over 10+ year field life |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V CAN bus power rails and LIN transceivers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt clamping device placed between VBAT and GND, activated within <1 ns of overvoltage event. Use Value: Limits rail voltage to ≤35.5 V during 100 V/500 ms load dump, preventing damage to TJA1042 and similar transceivers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in PLC modules exposed to relay coil kickback. IC Role / Device Role / Timing Role: Unidirectional TVS connected from sensor output line to ground, absorbing inductive spikes up to 600 W. Use Value: Clamps 100 V transients to 35.5 V within nanoseconds, preserving ADC input integrity and avoiding system resets. |
| Motor Drive Gate Driver Protection | Telecom DC Power Input Protection |
|
Use Scenario: Shielding high-side gate drivers (e.g., IR2110) from Miller-induced voltage spikes during IGBT switching. IC Role / Device Role / Timing Role: TVS placed across driver VDD-GND pins to clamp supply rail excursions caused by parasitic coupling. Use Value: Maintains gate driver VDD within 35.5 V during 1 kV/µs dV/dt events, preventing false turn-on and shoot-through failure. |
Use Scenario: Front-end surge suppression on −48 V DC telecom power inputs subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS installed between −48 V rail and chassis ground to divert common-mode energy. Use Value: Handles 10/1000 µs surges up to 600 W while maintaining <1 µA leakage at −48 V, ensuring standby power budget compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22AHM3_B/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure projects) | Direct substitution if halogen-free bill-of-materials is required; same thermal and mechanical behavior |
| SMCJ22AHE3_A/H | Higher 1500 W peak pulse power rating in larger SMC (DO-214AB) package; VBR and VC otherwise matched | Used where higher surge margin is needed (e.g., outdoor base station power inputs), but requires PCB layout change | Choose when 600 W is insufficient and board space allows SMC footprint; not pin-compatible |
Compared with SMBJ22AHE3_B/H, the HM3 variant offers identical protection performance with halogen-free construction, while the SMCJ22AHE3_A/H delivers 2.5× higher surge capacity at the cost of larger footprint and non-interchangeable mounting - guiding selection based on environmental compliance and surge severity requirements.
Availability
SMBJ22AHE3_B/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, motor drive gate drivers, and telecom power supplies requiring stable component supply with AEC-Q101 assurance and long-term lifecycle support.
Supply support for SMBJ22AHE3_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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial automation, and communications infrastructure where failure modes must be mitigated without compromising signal integrity or thermal performance.
FAQ
What is the clamping voltage of SMBJ22AHE3_B/H at its rated peak pulse current?
The SMBJ22AHE3_B/H has a maximum clamping voltage (VC) of 35.5 V at 16.9 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per JEDEC standards and guarantees that protected circuits experience no more than 35.5 V during worst-case surge events - a critical parameter for ensuring compatibility with 3.3 V, 5 V, and 24 V logic and power rails downstream of SMBJ22AHE3_B/H.
Is SMBJ22AHE3_B/H qualified for automotive applications?
Yes, SMBJ22AHE3_B/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet revision 09-Jan-2024. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating SMBJ22AHE3_B/H for use in engine control modules, body electronics, and ADAS sensor subsystems where reliability under thermal and vibration stress is mandatory.
What does the "B/H" suffix in SMBJ22AHE3_B/H indicate?
The "B/H" suffix in SMBJ22AHE3_B/H denotes packaging configuration: "B" specifies the revision level (document revision B), and "H" indicates the preferred package code for 7″ diameter tape-and-reel delivery with 750 units per reel. This matches Vishay's official ordering information table and ensures correct logistics handling, reel orientation, and automated placement compatibility for SMBJ22AHE3_B/H in SMT production lines.
How does SMBJ22AHE3_B/H differ from bidirectional variants like SMBJ22CA?
SMBJ22AHE3_B/H is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse conduction is not required. In contrast, SMBJ22CA is bidirectional, offering symmetrical clamping in both polarities - suitable for AC signal lines or differential buses. SMBJ22AHE3_B/H provides lower leakage (<1 µA at 22 V) and avoids ambiguity in grounding schemes, making it preferable for single-polarity power rails and sensor outputs where SMBJ22AHE3_B/H's directional behavior simplifies layout and improves noise margin.
What is the thermal resistance of SMBJ22AHE3_B/H, and how does it affect PCB layout?
SMBJ22AHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2″ × 0.2″ (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 board thickness and no internal plane heatsinking. To maintain junction temperature below 150 °C during repetitive surges, designers must allocate adequate copper area and avoid routing heat-sensitive components near SMBJ22AHE3_B/H - confirming thermal performance via simulation or empirical testing using the exact SMBJ22AHE3_B/H footprint and stack-up.
SMBJ22AHE3_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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 16.9A
- 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)
SMBJ22AHE3_B/H FAQ
1.How can I place an order for SMBJ22AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22AHE3_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 SMBJ22AHE3_B/H reliable?
The price and inventory of SMBJ22AHE3_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 SMBJ22AHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ22AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22AHE3_B/H?
SMBJ22AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22AHE3_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 SMBJ22AHE3_B/H?
For technical support, including SMBJ22AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22AHE3_B/H requirements.
6.How does Aetrix verify that SMBJ22AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ22AHE3_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 SMBJ22AHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ22AHE3_B/H?
All SMBJ22AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22AHE3_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 SMBJ22AHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ22AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22AHE3_B/H Tags
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