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Vishay General Semiconductor - Diodes Division SMBJ22AHM3_A/I
- Part No.:
- SMBJ22AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22AHM3_A/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,265
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Product details
Overview
SMBJ22AHM3_A/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 DC power rails and signal lines. It features 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 (10/1000 µs waveform), commonly deployed in industrial sensor interfaces and automotive control modules.
For engineers reviewing the SMBJ22AHM3_A/I datasheet, SMBJ22AHM3_A/I pinout, SMBJ22AHM3_A/I application, or SMBJ22AHM3_A/I equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and AEC-Q101-qualified halogen-free alternatives for automotive-grade designs requiring long-term reliability and UL 497B recognition.
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) define PCB pad layout requirements for sustained 5.0 W power dissipation at TA = 50 °C.
The SMBJ22AHM3_A/I complies with MSL Level 1 per J-STD-020 (peak reflow 260 °C), supports 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), and exhibits +0.096 %/°C temperature coefficient of VBR - enabling predictable voltage margining across -55 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse working voltage before clamping initiates; defines safe DC rail operating margin. |
| VBR (min/max) | 24.4 V / 26.9 V at IT = 1 mA - guaranteed breakdown onset window; ensures consistent turn-on across production lots. |
| VC @ IPPM | 35.5 V at 16.9 A (10/1000 µs) - clamped voltage seen by protected IC during worst-case surge; determines downstream voltage stress. |
| PPPM | 600 W - peak transient energy absorption capability; validates protection against IEC 61000-4-5 Level 4 surges. |
| IFSM | 100 A - single half-sine surge rating (8.3 ms); supports protection of MOSFET gates and power supply inputs against load dump. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - standardized 2-pin surface-mount outline with 0.205" × 0.130" footprint; compatible with automated pick-and-place. |
Pinout & Package
SMBJ22AHM3_A/I uses the SMB (DO-214AA) package: a 2-terminal, unidirectional surface-mount device with cathode indicated by a band on the body. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay's thermal design guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-voltage return path; forms clamping loop with cathode during overvoltage events. |
| Cathode | Protected line input | Banded end; connects to the line being protected (e.g., 24 V rail or sensor output); conducts surge current to ground when V > VC. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated clamping performance against high-energy transients like inductive switch-off and lightning-induced surges. |
| AEC-Q101 qualified (HM3 suffix) | Qualified for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for industrial and consumer electronics without compromising surge robustness. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns; eliminates pre-bake requirement. |
| UL 497B recognized (QVGQ2) | Approved for telecom and industrial signal line protection where regulatory safety certification is mandatory. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 24 V analog sensor outputs (e.g., pressure, temperature) from ESD and load-dump coupling in factory automation systems. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤35.5 V, preventing damage to 3.3 V or 5 V ADC front-end while maintaining signal integrity below 22 V normal operation. |
Use Scenario: Safeguarding LIN bus transceiver power pins against battery voltage transients during vehicle cranking or alternator load dump. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail feeding LIN physical layer ICs. Use Value: Absorbs up to 600 W surge energy without degradation, ensuring uninterrupted communication during ISO 16750-2 pulse 5a/b events. |
| Telecom Power Supply Input | Consumer Appliance Motor Driver |
Use Scenario: Secondary-side DC input protection for PoE-powered network switches exposed to induced surges on Ethernet cabling. IC Role / Device Role / Timing Role: Standoff-rated TVS on 48 V DC-DC converter input stage. Use Value: Clamps 10/1000 µs surges to 35.5 V, allowing downstream regulators to maintain regulation and avoid latch-up. |
Use Scenario: Overvoltage suppression on H-bridge gate driver supply rails in smart home washing machine motor controllers. IC Role / Device Role / Timing Role: Unidirectional TVS on 15 V bias rail protecting high-side and low-side driver ICs. Use Value: Withstands 100 A 8.3 ms forward surge, surviving repeated motor stall events without parametric shift or failure. |
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_A/I | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification; same VWM, VBR, VC, and PPPM. | Approved for commercial/industrial use only; unsuitable for automotive OEM or Tier-1 programs requiring halogen-free and AEC-Q101. | Select when cost-sensitive industrial designs do not require automotive qualification or halogen-free materials. |
| SAC22 | Same VWM (22 V) and VC (35.5 V), but lower PPPM (400 W); SOD-123FL package (smaller footprint, higher RθJA). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump. | Choose only for space-constrained consumer applications with well-bounded surge profiles and no automotive compliance needs. |
Compared with SMBJ22AHM3_A/I, SMBJ22AHE3_A/I offers identical electrical performance but omits halogen-free and AEC-Q101 credentials, while SAC22 trades 33 % lower surge capacity and inferior thermal performance for reduced board area - making SMBJ22AHM3_A/I the sole choice for automotive-qualified, high-energy protection in SMB footprint.
Availability
SMBJ22AHM3_A/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom power supply inputs requiring stable component supply, long-term lifecycle support, and certified halogen-free materials.
Supply support for SMBJ22AHM3_A/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, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMBJ series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure, with HM3 variants engineered specifically for AEC-Q101 compliance and halogen-free manufacturing.
FAQ
What is the clamping voltage of SMBJ22AHM3_A/I at its rated peak pulse current?
The SMBJ22AHM3_A/I has a maximum clamping voltage (VC) of 35.5 V at 16.9 A peak pulse current (IPPM), measured using the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in Vishay's datasheet revision 09-Jan-2024, page 2. The SMBJ22AHM3_A/I maintains this clamping performance across its full operating temperature range.
Is SMBJ22AHM3_A/I qualified for automotive applications?
Yes, SMBJ22AHM3_A/I is AEC-Q101 qualified, as indicated by the "HM3" suffix in its part number and confirmed in the Vishay datasheet section "Mechanical Data". It meets stress testing requirements for automotive electronics including temperature cycling, humidity bias, and mechanical shock - making it suitable for use in body control modules, sensor nodes, and infotainment power supplies where automotive-grade reliability is mandated.
What does the "_A/I" suffix mean in SMBJ22AHM3_A/I?
The "_A/I" suffix in SMBJ22AHM3_A/I denotes packaging configuration: "A" indicates the revision code (per Vishay's ordering information table), and "I" specifies 13-inch diameter plastic tape and reel delivery mode with 3200 units per reel. This matches the preferred package code "I" listed in the datasheet's Ordering Information section, ensuring compatibility with high-volume SMT assembly lines.
How does SMBJ22AHM3_A/I differ from SMBJ22AHE3_A/I?
SMBJ22AHM3_A/I and SMBJ22AHE3_A/I share identical electrical specifications (VWM = 22 V, VBR = 24.4–26.9 V, VC = 35.5 V), but differ in material compliance: HM3 is halogen-free and AEC-Q101 qualified, whereas HE3 is RoHS-compliant only. The SMBJ22AHM3_A/I is required for automotive Tier-1 designs and environmentally restricted markets where halogen content must be zero, while SMBJ22AHE3_A/I serves general industrial applications.
What is the thermal resistance of SMBJ22AHM3_A/I, and how does it affect PCB layout?
SMBJ22AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W, per Vishay's Thermal Characteristics table. To sustain its 5.0 W power dissipation at TA = 50 °C, the PCB must provide minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - a requirement directly tied to these thermal metrics and validated in the datasheet's derating curves.
SMBJ22AHM3_A/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:
- Obsolete
- 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_A/I FAQ
1.How can I place an order for SMBJ22AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22AHM3_A/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_A/I reliable?
The price and inventory of SMBJ22AHM3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ22AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22AHM3_A/I?
SMBJ22AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22AHM3_A/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_A/I?
For technical support, including SMBJ22AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22AHM3_A/I requirements.
6.How does Aetrix verify that SMBJ22AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ22AHM3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ22AHM3_A/I?
All SMBJ22AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22AHM3_A/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_A/I part is unused and in its original packaging.
Return procedure for SMBJ22AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22AHM3_A/I Tags
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