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Vishay General Semiconductor - Diodes Division SMBJ22AHM3_B/H
- Part No.:
- SMBJ22AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22AHM3_B/H.pdf
- Description:
- 600W,22V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,933
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Product details
Overview
SMBJ22AHM3_B/H 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 voltage transients induced by inductive load switching and lightning surges. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 35.5 V maximum clamping voltage (VC) at 16.9 A peak pulse current, and 600 W peak pulse power dissipation with a 10/1000 µs waveform.
For engineers reviewing the SMBJ22AHM3_B/H datasheet, SMBJ22AHM3_B/H pinout, SMBJ22AHM3_B/H application, or SMBJ22AHM3_B/H equivalent, this device is selected for robust overvoltage protection on DC power rails, MOSFET gate drivers, and sensor signal lines in industrial motor controls, automotive body electronics, and telecom interface circuits where low-profile mounting and AEC-Q101 qualification are required.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, leveraging a glass-passivated silicon junction for stable avalanche behavior under transient stress. Its thermal resistance (RθJA = 100 °C/W) and junction temperature range (–55 °C to +150 °C) support reliable operation in high-ambient environments when mounted on standard 0.2" × 0.2" copper pads.
The SMBJ22AHM3_B/H delivers fast response time (<1 ps), low incremental surge resistance, and meets MSL Level 1 per J-STD-020 with a 260 °C reflow peak. Its halogen-free, RoHS-compliant construction (HM3 suffix) and AEC-Q101 qualification confirm suitability for automotive-grade production systems requiring long-term reliability under repetitive surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 24 V systems. |
| VBR (min/max) | 24.4 V / 26.9 V at IT = 1 mA - Confirmed breakdown threshold ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 35.5 V at 16.9 A - Clamping voltage limits downstream component stress during 600 W, 10/1000 µs surge events. |
| PPPM | 600 W - Peak pulse power rating enables protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 24 V lines. |
| IPPM | 16.9 A - Peak pulse current capacity derived from 10/1000 µs waveform; validates energy-handling capability per JEDEC standards. |
| TJ max. | +150 °C - Maximum junction temperature supports operation in engine bay or industrial enclosures without derating. |
| Package | SMB (DO-214AA) - Low-profile SMD footprint (5.21 mm × 4.06 mm × 2.20 mm) compatible with automated pick-and-place and reflow assembly. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-indicated by molded band. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, with MSL Level 1 rating (260 °C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to lower-potential side of protected circuit (e.g., ground or return path); conducts during forward surge events. |
| Cathode | Reverse-biased terminal (marked with band) | Connected to higher-potential line (e.g., 24 V rail); avalanches into conduction when VWM exceeded, shunting surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including body control modules and infotainment power supplies, ensuring lifetime reliability under thermal cycling and vibration. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for global OEMs and industrial equipment without compromising surge performance or thermal stability. |
| 600 W peak pulse power (10/1000 µs) | Provides robust protection against IEC 61000-4-5 surges on 24 V DC buses without requiring external series impedance. |
| Low clamping ratio (VC/VWM ≈ 1.61) | Minimizes overvoltage exposure to downstream ICs (e.g., microcontrollers, CAN transceivers) during transient events. |
| Fast response time (<1 ps) | Engages before system-level ESD or surge energy propagates, preventing latch-up or gate oxide damage in MOSFETs and logic devices. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC power inputs in variable-frequency drives and PLC I/O modules exposed to relay coil flyback and contact arcing. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed directly across input terminals to limit transient voltage to ≤35.5 V during 600 W surges. Use Value: Prevents damage to upstream DC-DC converters and downstream gate drivers by limiting peak rail excursion within safe SOA margins. |
Use Scenario: Surge suppression on LIN bus power lines and window lift motor control outputs in passenger vehicles. IC Role / Device Role / Timing Role: Standoff-rated protector on 12/24 V supply rails, activated only during load dump or jump-start transients exceeding 22 V. Use Value: Enables AEC-Q101-compliant design without additional filtering, reducing BOM count while maintaining ISO 7637-2 Pulse 5a immunity. |
| Telecom Power Interfaces | Sensor Signal Conditioning Circuits |
|
Use Scenario: Input protection for PoE-powered remote radio units and base station backhaul interfaces operating from 24–48 V DC supplies. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC distribution, coordinated with upstream MOVs for multi-stage protection. Use Value: Maintains <100 ns response to fast-rising transients while surviving repeated 10/1000 µs surges per Telcordia GR-1089-CORE. |
Use Scenario: Protection of analog front-end inputs (e.g., thermistor, pressure sensor) connected to 24 V industrial controllers. IC Role / Device Role / Timing Role: Low-leakage (ID ≤ 1 µA at VWM) clamping diode placed at connector entry point to suppress ESD and cable discharge events. Use Value: Preserves signal integrity with minimal leakage impact on high-impedance sensor bridges while clamping ±35.5 V 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 |
|---|---|---|---|
| SMBJ22AHE3_B/H | Same electrical specs and SMB package, but RoHS-compliant without halogen-free certification (E3 vs HM3). | Approved for commercial/industrial use; not qualified for automotive AEC-Q101 applications. | Select when halogen-free requirement is absent and cost optimization is prioritized over automotive qualification. |
| SMAJ22A-HM3-TP | Lower peak pulse power (400 W), smaller SMA (DO-214AC) package, identical VWM/VC ratings. | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 surge events. | Choose only for space-constrained designs where 600 W surge immunity is not required and PCB layout allows smaller footprint. |
Compared with SMBJ22AHM3_B/H, the SMBJ22AHE3_B/H offers identical protection performance without halogen-free assurance, while the SMAJ22A-HM3-TP sacrifices 33 % pulse power headroom and thermal robustness for reduced board area-making SMBJ22AHM3_B/H the sole choice for AEC-Q101-compliant 600 W surge protection in SMB form factor.
Availability
SMBJ22AHM3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body electronics, and telecom power interfaces requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified surge protection.
Supply support for SMBJ22AHM3_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, efficiency, and application-specific validation.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where consistent clamping performance and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ22AHM3_B/H at its rated peak pulse current?
The SMBJ22AHM3_B/H has a maximum clamping voltage (VC) of 35.5 V at its specified peak pulse current (IPPM) of 16.9 A, measured using the standardized 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet revision 09-Jan-2024 (Document Number: 88392) and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMBJ22AHM3_B/H maintains this clamping performance across its full operating temperature range.
Is SMBJ22AHM3_B/H qualified for automotive applications?
Yes, SMBJ22AHM3_B/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure (HM3 suffix denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified variants). This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock, validating its use in automotive body control modules, lighting systems, and power distribution units. The SMBJ22AHM3_B/H data sheet explicitly references AEC-Q101 compliance in the Mechanical Data section.
What does the "HM3" suffix indicate in SMBJ22AHM3_B/H?
The "HM3" suffix in SMBJ22AHM3_B/H specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering information, HM3 denotes compliance with JEDEC J-STD-020 MSL Level 1, matte tin-plated leads, and whisker resistance per JESD 201 Class 2. It distinguishes the part from E3 (RoHS only) and HE3 (AEC-Q101 + RoHS, non-halogen-free) variants. The "B/H" denotes tape-and-reel packaging (7" reel, 750 units).
How does SMBJ22AHM3_B/H differ from bidirectional TVS diodes like SMBJ22CA?
SMBJ22AHM3_B/H is unidirectional and features a cathode band for polarity-sensitive placement, whereas SMBJ22CA is bidirectional with no polarity marking and symmetric clamping in both directions. The SMBJ22AHM3_B/H exhibits forward voltage drop (~3.5 V at 50 A) and is intended for DC rail protection, while SMBJ22CA suits AC-coupled or floating signal lines. Their VWM, VBR, and VC values differ accordingly-SMBJ22AHM3_B/H uses 22 V VWM, while SMBJ22CA uses 18.8 V VWM (bidirectional rating).
What is the thermal resistance junction-to-ambient for SMBJ22AHM3_B/H?
The SMBJ22AHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended pad layout (0.2" × 0.2" copper pads per terminal), as specified in the Thermal Characteristics table of the Vishay datasheet (Document Number: 88392). This value assumes natural convection cooling and is critical for calculating steady-state power dissipation limits and transient thermal performance during repetitive surge events.
SMBJ22AHM3_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)
SMBJ22AHM3_B/H FAQ
1.How can I place an order for SMBJ22AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22AHM3_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 SMBJ22AHM3_B/H reliable?
The price and inventory of SMBJ22AHM3_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 SMBJ22AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ22AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22AHM3_B/H?
SMBJ22AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22AHM3_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 SMBJ22AHM3_B/H?
For technical support, including SMBJ22AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ22AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ22AHM3_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 SMBJ22AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ22AHM3_B/H?
All SMBJ22AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22AHM3_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 SMBJ22AHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ22AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22AHM3_B/H Tags
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