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Vishay General Semiconductor - Diodes Division SMBJ22D-M3/I
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- Part No.:
- SMBJ22D-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22D-M3/I.pdf
- Description:
- TVS DIODE 22VWM 35.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,576
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Product details
Overview
SMBJ22D-M3/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), 24.8–26.6 V breakdown voltage (VBR) at 1 mA, 35.1 V maximum clamping voltage (VC) at 17.1 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed to safeguard MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in industrial and telecom systems.
For engineers reviewing the SMBJ22D-M3/I datasheet, SMBJ22D-M3/I pinout, SMBJ22D-M3/I application, or SMBJ22D-M3/I equivalent, key selection criteria include its ±3.5 % tight VBR tolerance, low 0.5 μA reverse leakage at VWM, M3 suffix halogen-free/RoHS/industrial-grade construction, and compliance with UL 497B and JESD 201 Class 2 whisker resistance.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging avalanche breakdown to limit transient voltages before they damage downstream circuitry. Its 125 °C/W junction-to-ambient thermal resistance and 150 °C max junction temperature support reliable operation under repetitive surge conditions when mounted on minimum recommended PCB pad layout.
The SMBJ22D-M3/I delivers fast response time and low incremental surge resistance, enabling effective suppression of sub-microsecond transients. Its bidirectional counterpart (e.g., SMBJ22CD) is not applicable here due to unidirectional polarity - confirmed by cathode band marking per mechanical drawing and electrical table labeling "UNI".
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 24.8 V / 26.6 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | 35.1 V at 17.1 A - clamping voltage during 600 W 10/1000 μs surge, limiting stress on protected ICs |
| PPPM | 600 W - peak pulse power handling capability per standard 10/1000 μs waveform |
| ID @ VWM | 0.5 μA - ultra-low reverse leakage preserves signal integrity and system quiescent current |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated placement and meets UL 94 V-0 flammability |
| RoHS/M3 | Halogen-free, RoHS-compliant, JESD 201 Class 2 whisker resistant - qualified for industrial reliability requirements |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band at one end; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; forms clamping path during positive transients |
| Cathode (banded end) | High-side transient input terminal | Connected to protected line (e.g., I/O, power rail); avalanche conduction occurs from cathode to anode |
Key Features
| Feature | Design Value |
|---|---|
| Tight VBR tolerance | ±3.5 % ensures consistent clamping threshold across units, reducing design margin uncertainty |
| 600 W peak pulse rating | Handles high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without degradation when properly mounted |
| Low leakage current | 0.5 μA at 22 V enables use on battery-backed or low-power sensor lines without measurable drain |
| MSL Level 1 | Rated for reflow up to 260 °C peak - supports standard SMT assembly without moisture sensitivity concerns |
| M3 suffix qualification | Meets JESD 201 Class 2 whisker resistance and industrial-grade reliability standards |
Applications
| Industrial Motor Control Inputs | Telecom Line Interface Protection |
|---|---|
Use Scenario: Protecting PLC digital input modules from inductive kickback generated by relay and solenoid coil de-energization. IC Role / Device Role / Timing Role: Unidirectional TVS placed between field input line and controller ground to clamp negative-going transients. Use Value: 35.1 V clamping voltage prevents damage to 24 V-rated input buffers while maintaining noise immunity via 22 V stand-off. | Use Scenario: Shielding Ethernet PHY interface pins (e.g., MDI-X pairs) from lightning-induced surges and ESD events in outdoor base stations. IC Role / Device Role / Timing Role: Primary front-end clamping device on differential signal lines, coordinated with common-mode chokes. Use Value: 600 W peak power rating and fast response suppress multi-kV transients before they reach sensitive transceivers. |
| Automotive Body Control Module Sensors | Consumer Appliance Power Supply Rails |
Use Scenario: Safeguarding LIN bus nodes and analog sensor inputs (e.g., temperature, pressure) in vehicle body electronics exposed to load dump and jump-start spikes. IC Role / Device Role / Timing Role: Unidirectional TVS connected between sensor supply line and chassis ground to absorb positive transients. Use Value: 22 V VWM aligns with 12 V automotive nominal systems; 150 °C TJ max supports under-hood ambient conditions. | Use Scenario: Protecting DC output rails of switch-mode power supplies in washing machines and HVAC controllers from internal switching noise and external surges. IC Role / Device Role / Timing Role: Secondary overvoltage clamp on regulated 24 V or 36 V outputs, downstream of primary bulk regulation. Use Value: Low 0.5 μA leakage avoids loading regulation feedback networks; SMB package fits compact PSU layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A-M3/I | Same VWM/VBR/VC specs but A-suffix denotes automotive-grade qualification (AEC-Q101) | Required for automotive OEM designs needing AEC-Q101 certification; not necessary for industrial use | Select SMBJ22A-M3/I only if automotive qualification is mandated; otherwise SMBJ22D-M3/I offers identical electrical performance at lower cost |
| P6SMB22A | Same SMB package and 22 V VWM, but 600 W rating uses 10/1000 μs waveform and exhibits higher VC (37.5 V) | Higher clamping voltage reduces protection margin for low-voltage ICs; suitable where tighter VC is not critical | Choose P6SMB22A only if legacy design compatibility or alternate sourcing is required; SMBJ22D-M3/I provides superior clamping (35.1 V) and tighter VBR tolerance |
Compared with SMBJ22A-M3/I and P6SMB22A, the SMBJ22D-M3/I delivers identical core protection specs with industrial-grade reliability and the tightest VBR tolerance (±3.5 %), making it optimal for cost-sensitive non-automotive applications requiring precise clamping control.
Availability
SMBJ22D-M3/I is available at Aetrix Electronics and suitable for industrial motor control, telecom infrastructure, automotive body electronics, and consumer appliance designs requiring stable component supply and long-term manufacturability.
Supply support for SMBJ22D-M3/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 reliability and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting industrial automation, telecommunications, and automotive subsystems where robustness and precision clamping are essential.
FAQ
What is the maximum clamping voltage of SMBJ22D-M3/I at its rated peak pulse current?
The SMBJ22D-M3/I has a maximum clamping voltage (VC) of 35.1 V at its rated peak pulse current (IPPM) of 17.1 A, measured using the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-power transient event and is critical for ensuring downstream ICs remain within their absolute maximum ratings. The SMBJ22D-M3/I maintains this clamping performance across its specified operating temperature range.
Does SMBJ22D-M3/I meet RoHS and halogen-free requirements?
Yes, the SMBJ22D-M3/I carries the M3 suffix, which certifies it as halogen-free, RoHS-compliant, and qualified to JESD 201 Class 2 for whisker resistance. These attributes are verified per Vishay's material categorization documentation and support compliance with environmental directives for industrial and consumer electronics. The M3 designation applies specifically to this part number and is documented in the ordering information table of the official datasheet.
Can SMBJ22D-M3/I be used in bidirectional protection circuits?
No, SMBJ22D-M3/I is a unidirectional TVS diode, as confirmed by its "UNI" designation in the electrical characteristics table and the presence of a cathode band marking. For bidirectional protection, Vishay specifies the SMBJ22CD variant. Using SMBJ22D-M3/I in a bidirectional configuration would result in improper clamping during negative transients and potential device failure. Always match polarity to circuit topology.
What is the thermal resistance and maximum junction temperature for SMBJ22D-M3/I?
The SMBJ22D-M3/I has a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W when mounted on the minimum recommended PCB pad layout, and a maximum junction temperature (TJ max) of +150 °C. These values define safe steady-state and transient power dissipation limits: at TA = 25 °C, its derated power is 1.0 W, rising to 5.0 W at TM = 50 °C with proper heatsinking. Thermal performance must be validated per actual board layout.
How does the VBR tolerance of SMBJ22D-M3/I impact circuit protection design?
The SMBJ22D-M3/I features a tight ±3.5 % breakdown voltage tolerance (24.8–26.6 V), which minimizes variation in clamping onset across production units. This allows designers to set narrower voltage margins between VWM (22 V) and VBR, improving noise immunity without risking premature conduction. In contrast, looser tolerances would require larger guard bands, potentially compromising protection responsiveness. The specification is verified per ANSI/IEEE C62.35 and tested at 1 mA.
SMBJ22D-M3/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):
- 24.8V
- Voltage - Clamping (Max) @ Ipp:
- 35.1V
- Current - Peak Pulse (10/1000µs):
- 17.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ22D-M3/I FAQ
1.How can I place an order for SMBJ22D-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22D-M3/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 SMBJ22D-M3/I reliable?
The price and inventory of SMBJ22D-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ22D-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ22D-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22D-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22D-M3/I?
SMBJ22D-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22D-M3/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 SMBJ22D-M3/I?
For technical support, including SMBJ22D-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22D-M3/I requirements.
6.How does Aetrix verify that SMBJ22D-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ22D-M3/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 SMBJ22D-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ22D-M3/I?
All SMBJ22D-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22D-M3/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 SMBJ22D-M3/I part is unused and in its original packaging.
Return procedure for SMBJ22D-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22D-M3/I Tags
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