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Vishay General Semiconductor - Diodes Division SMBJ22CA-E3/5B
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- Part No.:
- SMBJ22CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22CA-E3/5B.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,180
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Product details
Overview
SMBJ22CA-E3/5B 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 and power lines. It features a 22 V standoff voltage (VWM), 24.4–26.9 V breakdown range (VBR at 1 mA), 35.5 V maximum clamping voltage (VC) at 16.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and telecom equipment.
For engineers reviewing the SMBJ22CA-E3/5B datasheet, SMBJ22CA-E3/5B pinout, SMBJ22CA-E3/5B application, or SMBJ22CA-E3/5B equivalent, key selection criteria include bidirectional surge suppression capability, low clamping ratio (VC/VBR ≈ 1.42), RoHS-compliant matte tin terminations, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ps), while the low incremental surge resistance supports effective energy diversion during ESD and lightning-induced transients.
The device is rated for repetitive 600 W pulses at 0.01% duty cycle and derates linearly above 25 °C ambient, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). It meets UL 497B recognition (QVGQ2) and is RoHS-compliant per base P/N-E3 designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 22 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 24.4–26.9 V at 1 mA - Confirmed minimum/maximum breakdown range ensuring reliable turn-on under transient stress. |
| VC (Clamping Voltage) | 35.5 V at IPPM = 16.9 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Energy-handling capacity for standardized 10/1000 µs waveform; enables protection against IEC 61000-4-5 Level 4 surges. |
| IPPM (Peak Pulse Current) | 16.9 A - Maximum non-repetitive surge current supported at VC; directly tied to PCB pad thermal design (0.2" × 0.2" copper). |
| TJmax | 150 °C - Maximum junction temperature; sets upper limit for thermal design and power derating above 25 °C ambient. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 2.20 mm min. cathode/anode lead spacing; compatible with J-STD-002 soldering. |
Pinout & Package
Package: SMB (DO-214AA), molded case with matte tin-plated leads, MSL Level 1, UL 94 V-0 compliant. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode/anode terminals unmarked for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; conducts during negative polarity surges and serves as reference node for symmetrical clamping. |
| Cathode | Transient return path (bidirectional) | Connects to protected line; conducts during positive polarity surges; electrically identical to anode in CA-series devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| 600 W peak pulse power | Supports robust immunity to IEC 61000-4-5 surge events up to 4 kV (open-circuit) when properly mounted. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on protected ICs compared to higher-ratio suppressors. |
| MSL Level 1 rating | Allows unlimited floor life and reflow without baking; simplifies manufacturing handling. |
| RoHS-compliant, matte tin terminations | Ensures solderability per J-STD-002 and whisker resistance per JESD 201 Class 2. |
Applications
| Industrial Motor Control | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback signal lines in variable-frequency drives exposed to inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS placed across motor phase outputs and encoder lines to clamp flyback spikes and EFT bursts. Use Value: Prevents latch-up or permanent damage to isolated gate drivers and microcontrollers by limiting transient voltage to ≤35.5 V. |
Use Scenario: Surge protection on LIN bus and analog sensor inputs (e.g., pressure, temperature) in engine control units. IC Role / Device Role / Timing Role: Clamps load-dump and jump-start transients on 12 V supply rails and bidirectional data lines. Use Value: Maintains signal integrity during ISO 7637-2 Pulse 1/2/5a events without requiring additional filtering or layout area. |
| Telecom Power Supply | Consumer USB-C Port |
|
Use Scenario: Input-stage protection for 48 V DC-DC converters in PoE-powered network switches. IC Role / Device Role / Timing Role: Primary surge limiter on secondary-side 48 V distribution rail before point-of-load regulators. Use Value: Absorbs up to 600 W of surge energy from induced lightning transients while maintaining <1 ns response. |
Use Scenario: Overvoltage protection on VBUS and CC lines in USB-C receptacles subject to hot-plug and cable ESD. IC Role / Device Role / Timing Role: Fast-clamping element between VBUS and ground, and CC line to ground, for ±15 kV contact ESD (IEC 61000-4-2). Use Value: Limits voltage excursion to ≤35.5 V within nanoseconds, preventing damage to USB PD controllers and port multiplexers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package. | No functional difference; selected where halogen-free compliance is mandated in final assembly. | Direct drop-in replacement if halogen-free material requirement applies. |
| SMCJ22CA-E3/2A | Higher-power 1500 W version in larger SMC (DO-214AB) package; same VWM, VBR, and VC ratings. | Used where higher surge repetition rate or longer pulse duration (e.g., IEC 61000-4-5 combination wave) is required. | Choose when system-level testing requires >600 W pulse handling or improved thermal dissipation. |
Compared with SMBJ22CA-E3/5B, the M3/5B variant offers identical protection performance with halogen-free construction, while the SMCJ22CA-E3/2A provides 2.5× higher peak power in a larger footprint - enabling trade-offs between board space, regulatory compliance, and surge margin.
Availability
SMBJ22CA-E3/5B is available at Aetrix Electronics and suitable for industrial motor control, automotive sensor interface, telecom power supply, and consumer USB-C port designs requiring stable component supply, long-term lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for SMBJ22CA-E3/5B 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, precision, and high-volume manufacturability.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting industrial automation, automotive electronics, and communications infrastructure where repeatable clamping and AEC-Q101 qualification matter.
FAQ
What is the clamping voltage of SMBJ22CA-E3/5B at its rated peak pulse current?
The SMBJ22CA-E3/5B has a maximum clamping voltage (VC) of 35.5 V at its rated peak pulse current (IPPM) of 16.9 A using the standard 10/1000 µs waveform. This value is measured under defined test conditions with 0.2" × 0.2" copper pads and confirms the device's ability to limit transient overvoltage to a predictable level during surge events. The SMBJ22CA-E3/5B maintains this clamping performance bidirectionally.
Is SMBJ22CA-E3/5B suitable for automotive applications?
The SMBJ22CA-E3/5B is RoHS-compliant and qualified to MSL Level 1, but it is not AEC-Q101 certified. For automotive use, Vishay offers the AEC-Q101-qualified variant SMBJ22CAHE3_B/I. The SMBJ22CA-E3/5B may be used in non-safety-critical aftermarket or infotainment subsystems where full qualification is not mandated, but the SMBJ22CA-E3/5B itself does not carry AEC-Q101 documentation.
How does the bidirectional nature of SMBJ22CA-E3/5B affect PCB layout?
The SMBJ22CA-E3/5B has no polarity marking and functions identically in both directions, so PCB layout requires no orientation alignment - either terminal can connect to the protected line and the other to ground or reference. This simplifies routing in differential or floating systems like RS-485 or CAN bus stubs. The SMBJ22CA-E3/5B's symmetric structure eliminates risk of incorrect installation during assembly.
What is the thermal resistance of SMBJ22CA-E3/5B, and how does it impact power derating?
The SMBJ22CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. At ambient temperatures above 25 °C, its 5.0 W steady-state power dissipation must be linearly derated - for example, to ~3.5 W at 75 °C ambient. These values assume mounting on minimum recommended 5.0 mm × 5.0 mm copper pads, and the SMBJ22CA-E3/5B's thermal performance directly affects sustained surge repetition capability.
Can SMBJ22CA-E3/5B replace unidirectional SMBJ22A-E3/5B in existing designs?
No - the SMBJ22CA-E3/5B is bidirectional and lacks a cathode band, while the SMBJ22A-E3/5B is unidirectional with marked polarity. Substituting them requires verifying circuit topology: SMBJ22CA-E3/5B works only where symmetrical clamping is needed (e.g., AC lines, floating sensors), whereas SMBJ22A-E3/5B is required for DC-biased rails with defined anode/cathode connections. Using SMBJ22CA-E3/5B in place of SMBJ22A-E3/5B may cause improper conduction or failure to clamp in one polarity.
SMBJ22CA-E3/5B 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-E3/5B FAQ
1.How can I place an order for SMBJ22CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22CA-E3/5B 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-E3/5B reliable?
The price and inventory of SMBJ22CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ22CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ22CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22CA-E3/5B?
SMBJ22CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22CA-E3/5B 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-E3/5B?
For technical support, including SMBJ22CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22CA-E3/5B requirements.
6.How does Aetrix verify that SMBJ22CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ22CA-E3/5B 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-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ22CA-E3/5B?
All SMBJ22CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22CA-E3/5B, 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-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ22CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22CA-E3/5B Tags
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