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Vishay General Semiconductor - Diodes Division SMBJ22AHM3_B/I
- Part No.:
- SMBJ22AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22AHM3_B/I.pdf
- Description:
- 600W,22V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,317
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Product details
Overview
SMBJ22AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. 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 (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and automotive ECUs.
For engineers reviewing the SMBJ22AHM3_B/I datasheet, SMBJ22AHM3_B/I pinout, SMBJ22AHM3_B/I application, or SMBJ22AHM3_B/I equivalent, this page delivers verified electrical parameters, thermal derating behavior, AEC-Q101 qualification status, halogen-free RoHS compliance, and real-world clamping performance data essential for surge immunity validation in IEC 61000-4-5 Level 3 designs.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its 100 °C/W junction-to-ambient thermal resistance (RθJA) and 20 °C/W junction-to-lead (RθJL) support reliable operation up to 150 °C junction temperature under pulsed stress.
The SMBJ22AHM3_B/I meets MSL level 1 per J-STD-020 with 260 °C reflow peak, uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is qualified to AEC-Q101 for automotive applications - distinguishing it from commercial-grade E3/M3 variants by enhanced reliability testing and traceable wafer lot control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 22 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC bias margin for protected circuitry. |
| VBR (Breakdown Voltage) | 24.4–26.9 V at 1 mA - Voltage at which device enters avalanche conduction; ensures precise triggering above normal operating range. |
| VC (Clamping Voltage) | 35.5 V at IPPM = 16.9 A - Peak voltage seen by downstream IC during 10/1000 µs surge; determines actual stress on protected load. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability under standardized 10/1000 µs waveform; validates compliance with IEC 61000-4-5 surge test levels. |
| ID (Reverse Leakage) | 1.0 µA max. at VWM - Ultra-low leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max. | 150 °C - Maximum allowable junction temperature; enables deployment in under-hood automotive environments and industrial enclosures without forced cooling. |
| 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 and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode indicated by a band on the case body. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during positive transients on cathode side. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 24 V rail or CAN_H); conducts avalanche current to anode when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 24 V systems without parallel staging. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics with extended temperature cycling, HTRB, and ESD testing beyond commercial standards. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declarations; supports green manufacturing and end-of-life recycling requirements. |
| MSL Level 1 (260 °C peak) | Eliminates moisture sensitivity concerns during standard SMT reflow, avoiding popcorning and interfacial delamination risks. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in MOSFETs and microcontrollers. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24 V DC bus and gate driver inputs against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between power rail and ground, triggered within <1 ns to limit transient excursions. Use Value: Limits voltage spikes to ≤35.5 V during 16.9 A surge events, preventing MOSFET avalanche failure and ensuring uninterrupted PWM control. |
Use Scenario: Surge suppression on LIN bus lines and power supply inputs in door module ECUs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-clamp protector on 12 V/24 V input rails and bidirectional signal lines, operating across -40 °C to +125 °C ambient. Use Value: Maintains 1.0 µA leakage at 22 V to avoid battery drain while clamping 600 W surges per IEC 61000-4-5 Ed. 3. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
Use Scenario: Input-stage protection for AC/DC adapters and PoE injectors subjected to lightning-induced surges on primary-side DC links. IC Role / Device Role / Timing Role: Primary-side TVS on bulk capacitor input, absorbing repetitive 10/1000 µs pulses with 0.01% duty cycle. Use Value: Withstands ≥1000 surges at rated PPPM due to low thermal resistance (RθJL = 20 °C/W), extending service life in outdoor deployments. |
Use Scenario: ESD and surge hardening of microcontroller I/O pins and relay coil drivers in washing machine and HVAC main boards. IC Role / Device Role / Timing Role: Localized clamping element adjacent to connectors and switching nodes, mounted directly on PCB copper pads (0.2" × 0.2"). Use Value: Achieves 35.5 V clamping at 16.9 A with minimal layout parasitics, reducing need for additional RC snubbers or ferrite beads. |
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/I | Same electrical specs but RoHS-compliant commercial grade (non-AEC-Q101); no automotive qualification testing. | Limited to industrial/commercial use where AEC-Q101 is not mandated; lower cost for non-automotive BOMs. | Select when automotive qualification is unnecessary and cost optimization is prioritized over extended reliability validation. |
| SMAJ22A-M3/A | Lower PPPM (400 W vs. 600 W); SMA package (smaller footprint, higher RθJA = 140 °C/W). | Suitable only for lower-energy transients (<400 W) and space-constrained layouts where thermal margin permits. | Choose only if system-level surge testing confirms 400 W sufficiency and board area constraints prohibit SMB footprint. |
Compared with SMBJ22AHM3_B/I, the HE3 variant lacks AEC-Q101 validation and long-term automotive reliability data, while the SMAJ22A-M3/A sacrifices 33 % pulse power headroom and thermal performance - making SMBJ22AHM3_B/I the optimal choice for mission-critical 24 V automotive and industrial surge protection.
Availability
SMBJ22AHM3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and consumer appliance control boards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ22AHM3_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, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability, high-efficiency, and automotive-grade solutions.
The SMBJ series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ22AHM3_B/I at its rated peak pulse current?
The SMBJ22AHM3_B/I has a maximum clamping voltage (VC) of 35.5 V at its rated peak pulse current (IPPM) of 16.9 A, measured under the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream components like microcontrollers or MOSFETs remain within safe operating limits. The SMBJ22AHM3_B/I maintains this clamping performance across its full operating temperature range.
Is SMBJ22AHM3_B/I qualified for automotive applications?
Yes, SMBJ22AHM3_B/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's ordering information table. This qualification includes rigorous stress testing for temperature cycling, high-temperature reverse bias, and ESD robustness - making SMBJ22AHM3_B/I suitable for under-hood and chassis-mounted automotive electronics such as body control modules and power distribution units where reliability under thermal and electrical stress is essential.
What does the "HM3" suffix indicate in SMBJ22AHM3_B/I?
The "HM3" suffix in SMBJ22AHM3_B/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates AEC-Q101 qualification, "M" signifies halogen-free molding compound, and "3" confirms RoHS compliance per EU Directive 2011/65/EU. This distinguishes SMBJ22AHM3_B/I from commercial-grade variants like E3 (RoHS only) or HE3 (AEC-Q101 + RoHS, but not halogen-free), ensuring alignment with automotive environmental and reliability standards.
How does SMBJ22AHM3_B/I compare to SMBJ22AHE3_B/I in terms of reliability?
SMBJ22AHM3_B/I provides superior reliability over SMBJ22AHE3_B/I due to its AEC-Q101 qualification, which mandates additional stress tests including HTGB, H3TRB, and ESD verification beyond standard JEDEC requirements. While both share identical electrical parameters and RoHS compliance, SMBJ22AHM3_B/I undergoes wafer-level screening and lot traceability required for automotive deployment - making it the preferred choice where field failure rates must meet ASIL-B or zero-defect expectations.
What is the thermal resistance profile of SMBJ22AHM3_B/I and how does it affect layout design?
SMBJ22AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W, measured on 0.2" × 0.2" copper pads. These values require PCB layout with adequate copper pour on both anode and cathode pads to sustain repetitive surge duty cycles. For high-frequency surge environments, designers should minimize trace inductance and ensure ≥5.0 mm² total copper area per terminal to maintain clamping performance and prevent thermal runaway during sustained transient events.
SMBJ22AHM3_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):
- 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/I FAQ
1.How can I place an order for SMBJ22AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22AHM3_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 SMBJ22AHM3_B/I reliable?
The price and inventory of SMBJ22AHM3_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 SMBJ22AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ22AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22AHM3_B/I?
SMBJ22AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22AHM3_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 SMBJ22AHM3_B/I?
For technical support, including SMBJ22AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22AHM3_B/I requirements.
6.How does Aetrix verify that SMBJ22AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ22AHM3_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 SMBJ22AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ22AHM3_B/I?
All SMBJ22AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22AHM3_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 SMBJ22AHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ22AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22AHM3_B/I Tags
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