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Vishay General Semiconductor - Diodes Division SMBJ22CA-M3/5B
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- Part No.:
- SMBJ22CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22CA-M3/5B.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,801
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Product details
Overview
SMBJ22CA-M3/5B 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 or power lines. It features a 22 V standoff voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤35.5 V at 16.9 A peak surge current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ22CA-M3/5B datasheet, SMBJ22CA-M3/5B pinout, SMBJ22CA-M3/5B application, or SMBJ22CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping voltage under 36 V, halogen-free RoHS-compliant construction (M3 suffix), and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping behavior during positive and negative transients. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the low incremental surge resistance minimizes voltage overshoot during high-current ESD or lightning-induced surges.
The device is rated for continuous operation from –55 °C to +150 °C junction temperature, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). It meets MSL Level 1 per J-STD-020 and supports reflow soldering up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 22 V - maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 24.4–26.9 V at 1 mA - guaranteed conduction onset in either polarity; ensures predictable transient turn-on |
| VC (Clamping Voltage) | ≤35.5 V at IPPM = 16.9 A - limits downstream IC stress during 10/1000 µs surge; critical for 3.3 V/5 V rail protection |
| PPPM (Peak Pulse Power) | 600 W - sustains standardized lightning/surge pulses without failure; validated per ANSI/IEEE C62.35 |
| IPPM (Peak Pulse Current) | 16.9 A - maximum non-repetitive surge current it can divert; determines PCB trace sizing and fuse coordination |
| TJmax | +150 °C - enables use in high-temperature industrial enclosures without derating penalties |
| Package | SMB (DO-214AA) - 2-pin SMD footprint (5.21 mm × 4.06 mm × 2.20 mm); compatible with standard pick-and-place and reflow profiles |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Either terminal serves as anode or cathode depending on transient polarity; no band marking required for bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power (10/1000 µs) | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly mounted on 5 mm × 5 mm copper pads |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and JEDEC JESD201 Class 2 whisker resistance |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage exposure to protected ICs - critical for 24 V industrial I/O and RS-485 transceivers |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies manufacturing logistics |
Applications
| Industrial Sensor Interface | RS-485 Communication Line |
|---|---|
|
Use Scenario: Protecting analog output (4–20 mA) and digital I/O circuits in PLC modules exposed to motor switching noise and ground bounce. IC Role / Device Role: Bidirectional TVS placed across differential signal pair or between signal and chassis ground. Use Value: Clamps induced transients to ≤35.5 V, preventing latch-up or gate oxide damage in op-amps and microcontrollers. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers (e.g., MAX1487) against EFT bursts and cable discharge events in factory automation networks. IC Role / Device Role: Placed line-to-line (A–B) and line-to-ground on bus side of isolation barrier. Use Value: Maintains signal integrity by limiting common-mode surges to <36 V while preserving DC bias margins for receiver input thresholds. |
| Telecom Power Feeding | Automotive Body Control Module |
|
Use Scenario: Protecting PoE-powered devices (e.g., IP cameras) receiving 48 V DC over twisted-pair cabling subject to lightning-induced surges. IC Role / Device Role: Mounted across power pair (PSE side) to clamp mode-common transients before DC-DC converter input. Use Value: Withstands 600 W surges without degradation, enabling compliance with IEEE 802.3bt surge immunity requirements. |
Use Scenario: Shielding LIN bus nodes and switch inputs in BCMs from load dump and alternator ripple in 12 V vehicle electrical systems. IC Role / Device Role: Installed on LIN data line and wake-up input pins to suppress coupled transients from solenoid actuation. Use Value: Halogen-free M3 construction satisfies automotive material restrictions; bidirectional symmetry avoids layout errors in dual-rail designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA-E3/5B | Same electrical specs; RoHS-compliant but contains brominated flame retardants (non-halogen-free) | Acceptable for commercial-grade industrial equipment where halogen-free mandate does not apply | Select E3 if halogen content is unrestricted and cost optimization is prioritized |
| SMAJ22CA-M3 | Lower peak pulse power (400 W vs. 600 W); SMA package (smaller footprint, higher RθJA = 140 °C/W) | Limited to lower-energy transients (e.g., ESD-only); unsuitable for IEC 61000-4-5 Level 3+ surges | Choose SMAJ22CA-M3 only for space-constrained consumer electronics with verified lower surge exposure |
Compared with SMBJ22CA-E3/5B and SMAJ22CA-M3, the SMBJ22CA-M3/5B uniquely combines halogen-free compliance, 600 W surge handling, and SMB package thermal robustness - making it the preferred choice for industrial and automotive applications requiring full IEC/ISO surge immunity and material sustainability.
Availability
SMBJ22CA-M3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, RS-485 communication lines, and telecom power feeding requiring stable component supply, long-term lifecycle support, and halogen-free material compliance.
Supply support for SMBJ22CA-M3/5B 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, power efficiency, and automotive qualification.
The SMBJ series targets high-energy transient suppression in harsh environments - engineered for industrial automation, telecom infrastructure, and automotive subsystems where consistent clamping performance and long-term stability are mandatory.
FAQ
What is the clamping voltage of SMBJ22CA-M3/5B at its rated peak pulse current?
The SMBJ22CA-M3/5B clamps to a maximum of 35.5 V when subjected to its rated peak pulse current of 16.9 A (10/1000 µs waveform). This value is measured across the device terminals under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ22CA-M3/5B maintains this clamping performance consistently across both polarities due to its bidirectional design.
Is SMBJ22CA-M3/5B suitable for automotive applications?
The SMBJ22CA-M3/5B itself is commercial-grade and not AEC-Q101 qualified; however, Vishay offers the functionally identical SMBJ22CA-HM3_B/I variant with AEC-Q101 qualification. For non-safety-critical automotive body electronics (e.g., LIN bus protection), SMBJ22CA-M3/5B may be used with customer validation, but SMBJ22CA-HM3_B/I is required for formal automotive qualification. The SMBJ22CA-M3/5B shares identical electrical specs and SMB package dimensions with the HM3 variant.
How does the M3 suffix affect the SMBJ22CA-M3/5B's compliance status?
The M3 suffix on SMBJ22CA-M3/5B indicates halogen-free, RoHS-compliant construction per JEDEC J-STD-609A Class 1, with bromine and chlorine content each <900 ppm. It also meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability rating. This distinguishes it from the E3 suffix (RoHS-compliant but not halogen-free) and supports compliance with strict environmental mandates in EU industrial and medical equipment.
What is the thermal resistance of SMBJ22CA-M3/5B, and how does it impact power dissipation?
The SMBJ22CA-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per Vishay's recommended layout. At 25 °C ambient, this allows 5.0 W continuous power dissipation (PD). Higher ambient temperatures require linear derating - e.g., at 70 °C ambient, max PD drops to ~3.0 W. The SMBJ22CA-M3/5B's RθJL of 20 °C/W supports localized heat sinking via PCB copper pours connected to leads.
Can SMBJ22CA-M3/5B replace unidirectional TVS diodes in existing designs?
No - SMBJ22CA-M3/5B is strictly bidirectional and lacks polarity marking; substituting it for a unidirectional part (e.g., SMBJ22A-M3/5B) risks incorrect placement and failure to protect forward-biased transients. Unidirectional TVS diodes conduct only in reverse bias and rely on cathode band orientation. The SMBJ22CA-M3/5B must be used only in applications requiring symmetrical clamping, such as AC signal lines or floating buses. Always verify schematic symbol and layout polarity before replacement.
SMBJ22CA-M3/5B 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):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 16.9A
- 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)
SMBJ22CA-M3/5B FAQ
1.How can I place an order for SMBJ22CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22CA-M3/5B 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 SMBJ22CA-M3/5B reliable?
The price and inventory of SMBJ22CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ22CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ22CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22CA-M3/5B?
SMBJ22CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22CA-M3/5B 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 SMBJ22CA-M3/5B?
For technical support, including SMBJ22CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22CA-M3/5B requirements.
6.How does Aetrix verify that SMBJ22CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ22CA-M3/5B 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 SMBJ22CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ22CA-M3/5B?
All SMBJ22CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22CA-M3/5B, 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 SMBJ22CA-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ22CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22CA-M3/5B Tags
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