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Vishay General Semiconductor - Diodes Division SMBJ22CD-M3/I
- Part No.:
- SMBJ22CD-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22CD-M3/I.pdf
- Description:
- TVS DIODE 22VWM 35.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,808
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Product details
Overview
SMBJ22CD-M3/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 22 V stand-off voltage (VWM), 24.8–26.6 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), <0.5 μA reverse leakage at VWM, and clamps to ≤35.1 V at 17.1 A peak surge current.
For engineers reviewing the SMBJ22CD-M3/I datasheet, SMBJ22CD-M3/I pinout, SMBJ22CD-M3/I application, or SMBJ22CD-M3/I equivalent, key selection criteria include bidirectional clamping capability, tight ±3.5 % VBR tolerance, MSL Level 1 moisture sensitivity, halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on consumer, industrial, and telecom PCBs.
Technical Context
This device operates as a voltage-clamped protection element across bidirectional signal or DC bus lines, responding within picoseconds to ESD and lightning-induced surges. Its symmetrical I-V characteristic enables identical clamping in both polarities, with low incremental surge resistance ensuring minimal voltage overshoot during high-current transients.
The SMBJ22CD-M3/I uses silicon avalanche junction technology optimized for repetitive 10/1000 μs waveform suppression at up to 0.01 % duty cycle. Thermal design relies on its 125 °C/W junction-to-ambient thermal resistance when mounted on minimum recommended pad layout, and it sustains operation from –55 °C to +150 °C junction temperature.
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 limits downstream IC stress during 600 W surge events |
| PPPM | 600 W (10/1000 μs) - rated surge energy handling for industrial-grade transient immunity |
| ID @ VWM | <0.5 μA - negligible leakage preserves signal integrity and battery life in always-on circuits |
| Package | SMB (DO-214AA) - standardized surface-mount outline compatible with IPC-7351B footprint and pick-and-place equipment |
| MSL Level | Level 1 (260 °C peak reflow) - supports standard lead-free soldering without pre-baking |
Pinout & Package
Two-terminal device in SMB (DO-214AA) package; no polarity marking for bidirectional operation. Cathode band omitted per specification for CD-suffix variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Connects to protected line; conducts avalanche current when voltage exceeds VBR in negative polarity |
| Cathode | Transient current entry (negative half-cycle) | Connects to protected line; conducts avalanche current when voltage exceeds VBR in positive polarity |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating differential lines without polarity concerns |
| ±3.5 % VBR tolerance | Reduces design margin overhead and improves consistency in multi-channel protection schemes |
| 600 W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4 kV) surge immunity requirements with margin |
| Low 125 °C/W RθJA | Allows thermal management using standard PCB copper area without heatsinks in most applications |
| M3 suffix compliance | Halogen-free, RoHS-compliant, and JESD 201 Class 2 whisker-resistant for industrial reliability |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
Use Scenario: Protecting RS-485 transceivers and analog sensor inputs in factory automation PLCs exposed to motor switching noise and ground bounce. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair or supply rail to clamp transients before they reach sensitive input stages. Use Value: Prevents latch-up and permanent damage in transceivers operating at 22 V common-mode range while maintaining signal fidelity below VWM. | Use Scenario: Safeguarding Ethernet PHY interfaces and DSL line drivers against induced surges from nearby AC wiring or lightning coupling. IC Role / Device Role / Timing Role: Primary front-end surge clamp on twisted-pair data lines, coordinated with gas discharge tubes or secondary MOVs. Use Value: Limits clamping voltage to 35.1 V, staying well below 40 V absolute maximum ratings of common PHY ICs. |
| Consumer Power Adapter Input | Automotive Body Control Module |
Use Scenario: Suppressing line-to-line and line-to-ground surges on 24 V DC input rails of wall adapters and USB-C PD power supplies. IC Role / Device Role / Timing Role: Secondary-level TVS after primary fuse/MOV, protecting rectifier bridges and controller ICs from residual spikes. Use Value: Withstands 600 W pulses without degradation, enabling compact designs that meet UL 62368-1 surge withstand requirements. | Use Scenario: Guarding LIN bus nodes and CAN FD stub lines in vehicle body electronics against load dump and ISO 7637-2 pulse 1/2a/3a transients. IC Role / Device Role / Timing Role: Localized point-of-use protection on microcontroller GPIOs and transceiver supply pins. Use Value: Operates reliably from –55 °C to +150 °C and maintains <0.5 μA leakage at 22 V, minimizing standby current drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA-E3/52 | Same VWM/VBR/PPPM specs; differs in packaging (tape-and-reel quantity 2500 vs. 3200) and MSL rating (Level 1 vs. unspecified in older revision) | No functional difference in circuit protection; may require requalification if MSL compliance is audited | Select SMBJ22CD-M3/I when full MSL Level 1 traceability and JESD 201 Class 2 whisker resistance are required |
| P6SMB22CA | Identical electrical specs but legacy Vishay part number; same SMB package, 600 W rating, bidirectional, 22 V VWM | Same PCB footprint and performance; minor differences in test conditions per revision history | Acceptable drop-in alternative where legacy BOM continuity is prioritized over latest M3 suffix compliance |
Compared with SMBJ22CA-E3/52 and P6SMB22CA, the SMBJ22CD-M3/I provides verified MSL Level 1 handling, halogen-free construction, and documented JESD 201 Class 2 whisker resistance-critical for high-reliability industrial and automotive production programs requiring long-term solderability assurance.
Availability
SMBJ22CD-M3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, consumer power adapter inputs, and automotive body control modules requiring stable component supply and consistent surge immunity performance.
Supply support for SMBJ22CD-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The SMBJ series was developed for robust, surface-mount transient suppression in space-constrained environments-targeting industrial automation, telecom infrastructure, and automotive subsystems where repeatable clamping and long-term stability are essential.
FAQ
What does the "CD" suffix indicate in SMBJ22CD-M3/I?
The "CD" suffix in SMBJ22CD-M3/I denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities. Unlike unidirectional variants (e.g., SMBJ22D), it has no cathode band and functions identically whether voltage polarity reverses-ideal for AC-coupled signals, differential buses, or floating power rails where polarity is undefined or alternating.
Is SMBJ22CD-M3/I suitable for IEC 61000-4-5 surge testing?
Yes, SMBJ22CD-M3/I is rated for 600 W peak pulse power with a 10/1000 μs waveform, which aligns with IEC 61000-4-5 Level 4 (4 kV) open-circuit voltage testing when properly implemented with appropriate series impedance. Its clamping voltage of ≤35.1 V at 17.1 A ensures protected ICs remain within safe operating limits during standardized surge events.
What is the thermal resistance of SMBJ22CD-M3/I under standard mounting conditions?
The SMBJ22CD-M3/I has a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W when mounted on the minimum recommended PCB pad layout per Vishay's datasheet. This value increases if copper area is reduced and decreases with larger thermal pads or internal ground planes-designers should reference Figure 5 in Document Number 87606 for derating curves versus ambient temperature.
Does SMBJ22CD-M3/I require a heatsink for continuous operation?
No, SMBJ22CD-M3/I does not require an external heatsink for transient suppression duty cycles (e.g., 0.01 %), as its 600 W rating applies to short-duration pulses. For steady-state dissipation, its 1.0 W rating at TA = 25 °C means continuous DC power must remain far below this level-typical use involves only momentary clamping, so PCB copper acts as sufficient thermal mass without added heatsinking.
How does the M3 suffix affect SMBJ22CD-M3/I's compliance and reliability?
The M3 suffix in SMBJ22CD-M3/I certifies halogen-free, RoHS-compliant materials and passes JESD 201 Class 2 whisker testing-ensuring long-term solder joint integrity in high-humidity or thermally cycled environments. It also meets MSL Level 1 per J-STD-020, allowing direct placement into lead-free reflow ovens without pre-baking, unlike non-M3 variants that may require moisture-sensitive handling.
SMBJ22CD-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ22CD-M3/I FAQ
1.How can I place an order for SMBJ22CD-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22CD-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 SMBJ22CD-M3/I reliable?
The price and inventory of SMBJ22CD-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 SMBJ22CD-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ22CD-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22CD-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22CD-M3/I?
SMBJ22CD-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22CD-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 SMBJ22CD-M3/I?
For technical support, including SMBJ22CD-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22CD-M3/I requirements.
6.How does Aetrix verify that SMBJ22CD-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ22CD-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 SMBJ22CD-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ22CD-M3/I?
All SMBJ22CD-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22CD-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 SMBJ22CD-M3/I part is unused and in its original packaging.
Return procedure for SMBJ22CD-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22CD-M3/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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