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Vishay General Semiconductor - Diodes Division SMBJ22CA-M3/52
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- Part No.:
- SMBJ22CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22CA-M3/52.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,821
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Product details
Overview
SMBJ22CA-M3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 22 V stand-off 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 - used in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ22CA-M3/52 datasheet, SMBJ22CA-M3/52 pinout, SMBJ22CA-M3/52 application, or SMBJ22CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, 22 V working voltage compatibility with 3.3 V/5 V/24 V systems, low leakage (<1.0 μA at VWM), MSL Level 1 moisture sensitivity, and halogen-free RoHS compliance per Vishay's M3 suffix.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche breakdown in both directions, enabling suppression of positive and negative transients without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance, while the SMB package supports automated SMT placement and meets UL 94 V-0 flammability rating.
Designed for transient immunity per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge), it delivers fast response time (<1.0 ns) and thermal stability up to TJ = 150 °C. The 100 °C/W junction-to-ambient thermal resistance requires appropriate PCB copper pad area (0.2" × 0.2") for rated 600 W pulse handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 24.4 V / 26.9 V at 1 mA - guaranteed symmetric breakdown threshold in both directions |
| VC @ IPPM | ≤35.5 V at 16.9 A - clamped voltage during 600 W 10/1000 μs surge, limiting stress on downstream ICs |
| PPPM | 600 W - peak pulse power handling with 0.01% duty cycle, validated per Fig. 1 |
| ID @ VWM | ≤1.0 μA - ultra-low reverse leakage preserves signal integrity in high-impedance circuits |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMT outline with 5.59 mm max length and 2.20 mm max height |
| MSL Level | Level 1 (J-STD-020) - no floor life limitation; safe for standard reflow without dry pack |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for full power rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical terminals; conducts avalanche current in either direction when |V| > VBR |
| Case (SMB body) | Thermal and mechanical interface | No electrical connection; provides mechanical anchoring and heat dissipation via PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines without polarity concerns |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges with margin on 24 V industrial buses |
| Halogen-free & RoHS-compliant (M3) | Fulfills environmental compliance for EU, China RoHS, and JEITA-MITI standards |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., relay switching) |
| 150 °C max junction temperature | Supports operation in enclosed industrial enclosures with ambient temperatures up to +85 °C |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
Use Scenario: Protecting analog output (4–20 mA) or digital I/O (RS-485) lines in PLC modules from inductive kickback and lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point, shunting transients before reaching signal conditioning ICs. Use Value: Limits voltage seen by op-amps and RS-485 transceivers to ≤35.5 V, preventing latch-up or gate oxide damage under 1 kV surge events. | Use Scenario: Shielding Ethernet PHY or PoE-powered device front-ends against ESD and surge coupling from unshielded cabling. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pairs (e.g., TX+/TX−) to clamp common-mode transients without disrupting DC bias. Use Value: Maintains signal integrity during ±8 kV contact ESD (IEC 61000-4-2) while adding <0.5 pF capacitance per line - negligible impact on 100BASE-TX bandwidth. |
| Automotive Body Control Module | Consumer Appliance Power Input |
Use Scenario: Safeguarding LIN bus or switched 12 V supply rails in non-safety-critical automotive subsystems (e.g., mirror controls, seat modules). IC Role / Device Role / Timing Role: Secondary overvoltage clamp after primary fuse, absorbing load dump spikes up to 35 V for short durations. Use Value: Withstands 12 V system transients up to 35.5 V clamping level and 16.9 A surge, meeting ISO 7637-2 Pulse 1/2a requirements when combined with proper layout. | Use Scenario: Protecting AC-DC adapter input stage and microcontroller reset lines in white goods (e.g., washing machine control board). IC Role / Device Role / Timing Role: Standoff-rated suppressor on 24 V auxiliary rail, triggered only during abnormal conditions (e.g., capacitor failure, rectifier short). Use Value: Blocks <1.0 μA at 22 V, eliminating standby current drain; clamps 600 W surges without degradation over 10,000+ events per JEDEC JESD22-A114. |
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 electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3) | Acceptable where halogen-free requirement is not mandated (e.g., non-EU commercial products) | Select E3 for cost-sensitive, non-automotive commercial designs with standard RoHS needs |
| SAC22CA | Same VWM/VBR/PPPM but in smaller SOD-123FL package; higher RθJA (150 °C/W) | Limited to lower-duty-cycle or lower-energy transients due to reduced thermal mass | Choose SAC22CA only when board space is constrained and surge energy remains below 100 mJ |
Compared with SMBJ22CA-E3/52, the M3 variant adds halogen-free compliance without performance trade-offs; versus SAC22CA, SMBJ22CA-M3/52 offers superior thermal robustness and higher surge repetition capability due to its larger SMB footprint and lower thermal resistance.
Availability
SMBJ22CA-M3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control modules, and consumer appliance power inputs requiring stable component supply across multi-year production cycles.
Supply support for SMBJ22CA-M3/52 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 is part of Vishay's TRANSZORB® TVS platform, engineered for robust transient immunity in harsh environments - targeting industrial automation, telecom infrastructure, and automotive electronics where repeatable clamping performance and long-term stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ22CA-M3/52 under a 10/1000 μs surge?
The SMBJ22CA-M3/52 clamps to a maximum of 35.5 V when subjected to its rated peak pulse current of 16.9 A (corresponding to 600 W with a 10/1000 μs waveform). This value is measured per Figure 1 in Vishay document 88392 and represents worst-case voltage seen by protected circuitry during standardized surge testing.
Is SMBJ22CA-M3/52 suitable for protecting RS-485 communication lines?
Yes, SMBJ22CA-M3/52 is widely used for RS-485 line protection due to its bidirectional symmetry, low clamping voltage (≤35.5 V), and minimal junction capacitance (~100 pF at zero bias). Its 22 V stand-off voltage aligns with typical RS-485 common-mode range, and the SMB package allows direct placement across differential pairs without layout compromise.
Does SMBJ22CA-M3/52 meet AEC-Q101 qualification?
No, SMBJ22CA-M3/52 is not AEC-Q101 qualified. It carries the M3 suffix indicating halogen-free RoHS compliance for commercial-grade use. For automotive-qualified equivalents, refer to Vishay's HM3-suffixed variants (e.g., SMBJ22CAHM3_B/H), which include additional stress testing and traceability per AEC-Q101.
What is the thermal resistance of SMBJ22CA-M3/52, and how does it affect layout?
SMBJ22CA-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. To sustain repeated 600 W pulses, PCB layout must provide these minimum pad areas; reducing pad size increases junction temperature and derates peak power per Figure 2 in the datasheet.
How does the M3 suffix differ from E3 in SMBJ22CA-M3/52?
The M3 suffix in SMBJ22CA-M3/52 denotes halogen-free, RoHS-compliant construction, whereas E3 indicates RoHS-compliant but not halogen-free. Both share identical electrical specifications and packaging, but M3 satisfies stricter environmental mandates (e.g., JEITA-MITI, certain EU customer requirements) where brominated flame retardants are prohibited.
SMBJ22CA-M3/52 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-M3/52 FAQ
1.How can I place an order for SMBJ22CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22CA-M3/52 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-M3/52 reliable?
The price and inventory of SMBJ22CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ22CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ22CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22CA-M3/52?
SMBJ22CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22CA-M3/52 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-M3/52?
For technical support, including SMBJ22CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22CA-M3/52 requirements.
6.How does Aetrix verify that SMBJ22CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ22CA-M3/52 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-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ22CA-M3/52?
All SMBJ22CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22CA-M3/52, 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-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ22CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22CA-M3/52 Tags
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