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Vishay General Semiconductor - Diodes Division SMBJ22C-E3/5B
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- Part No.:
- SMBJ22C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22C-E3/5B.pdf
- Description:
- TVS DIODE 22VWM 39.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,996
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Product details
Overview
SMBJ22C-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 stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), 35.5 V maximum clamping voltage (VC) at 16.9 A, and operates across –55 °C to +150 °C junction temperature - deployed in sensor interface protection for industrial automation systems.
For engineers reviewing the SMBJ22C-E3/5B datasheet, SMBJ22C-E3/5B pinout, SMBJ22C-E3/5B application, or SMBJ22C-E3/5B equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal derating curves, JEDEC-compliant SMB package dimensions, and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, VC, and IPPM ratings in forward and reverse directions. Its glass-passivated junction enables sub-nanosecond response time and low dynamic impedance under surge conditions.
The device complies with ANSI/IEEE C62.35 for transient suppressor definitions and meets UL 497B recognition (QVGQ2) for telecom and industrial protectors. Thermal resistance is 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads, with derating above 25 °C per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events |
| VC @ IPPM | 35.5 V at 16.9 A (10/1000 µs) - Clamped voltage seen by protected circuit under full-rated surge |
| PPPM | 600 W - Peak pulse power handling capability; determines survivability against lightning-induced or inductive-switching transients |
| ID @ VWM | 1.0 µA max - Ultra-low reverse leakage ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ Range | –55 °C to +150 °C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity unmarked for bidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | One side of symmetrical PN junction; connects to line under protection (e.g., RS-485 A or CAN_H) |
| Cathode | Terminal K | Other side of symmetrical PN junction; connects to same line (e.g., RS-485 B or CAN_L); no band marking for bidirectional configuration |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout in differential bus protection |
| 600 W peak pulse rating | Withstands 10/1000 µs surges up to 16.9 A - meets IEC 61000-4-5 Level 3 (1 kV line-to-line, 2 kV line-to-earth) without degradation |
| Low clamping ratio (VC/VBR) | 1.46 (35.5 V / 24.4 V) - minimizes overvoltage stress on downstream ICs such as UART transceivers or ADC front-ends |
| MSL Level 1 moisture sensitivity | Reflow-compatible at 260 °C peak without baking - supports standard SMT assembly with zero floor-life constraints |
| AEC-Q101 qualification option | Available as SMBJ22CHE3_X variant - validated for automotive powertrain and body electronics applications requiring zero defect reliability |
Applications
| Industrial Sensor Interface | Automotive CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting analog output lines (4–20 mA) and digital I/O (I²C, SPI) of pressure/temperature sensors in factory-floor PLC modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor signal line and ground, absorbing ESD and inductive kickback from nearby solenoid switching. Use Value: Limits transient voltage to ≤35.5 V, preventing latch-up or gate oxide damage in precision op-amps and microcontrollers interfacing the sensor. |
Use Scenario: Safeguarding CAN_H and CAN_L differential pair in vehicle body control modules exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Paired SMBJ22C-E3/5B devices (one per line) referenced to chassis ground, providing symmetrical clamping without polarity biasing. Use Value: Maintains CAN signal integrity during 10/1000 µs surges up to ±35.5 V, preserving bit timing and enabling >500 kbps communication under stress. |
| Telecom Line Card Surge Protection | Consumer USB Port ESD Guard |
|
Use Scenario: Front-end protection for Ethernet PHYs and PoE injectors in enterprise VoIP gateways subjected to lightning-induced surges on RJ-45 ports. IC Role / Device Role / Timing Role: Placed across each twisted pair (e.g., TIP-RING) before magnetics, shunting common-mode transients to earth ground. Use Value: Clamps induced voltages within 1 ns, limiting energy delivered to PHY IC to <10 mJ - avoids reset or packet loss during surge events. |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+ and D− lines in smart home hubs, supplementing internal IC-level protection. IC Role / Device Role / Timing Role: Low-capacitance (≈200 pF typical) bidirectional TVS mounted directly at USB connector, diverting ±15 kV contact discharge per IEC 61000-4-2. Use Value: Adds robustness beyond integrated protection diodes, reducing failure rate in field deployments with frequent hot-plug cycles and static-prone environments. |
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 and SMB package; CA suffix explicitly denotes bidirectional version (identical to C suffix in Vishay's naming) | No functional difference - CA and C are interchangeable per Vishay documentation; both meet identical VBR, VC, and PPPM specs | Select SMBJ22CA-E3/5B if legacy BOMs or distributor filters require explicit "CA" designation; otherwise SMBJ22C-E3/5B is functionally identical. |
| SMAJ22C-E3/52 | Lower 400 W PPPM, higher VC = 37.5 V at 11.7 A, SMA (DO-214AC) package - smaller footprint (4.57 mm × 2.79 mm) but reduced surge margin | Suitable only for lower-energy threats (e.g., IEC 61000-4-2 ESD only); not recommended for IEC 61000-4-5 line surges due to 33 % lower power rating | Choose SMAJ22C-E3/52 only when board space is critical and surge threat level is limited to ESD; prefer SMBJ22C-E3/5B for full industrial surge immunity. |
Compared with SMBJ22CA-E3/5B (identical spec), SMBJ22C-E3/5B offers no differentiation in performance or layout; versus SMAJ22C-E3/52, it provides 50 % higher surge power handling and tighter clamping - essential for robust protection in harsh electromagnetic environments.
Availability
SMBJ22C-E3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive CAN networks, telecom line cards, and consumer USB port protection requiring stable component supply and long-term manufacturability.
Supply support for SMBJ22C-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, power efficiency, and AEC-Q qualification.
The SMBJ series targets high-energy transient suppression in space-constrained applications, delivering 600 W surge capability in the compact SMB package for industrial, automotive, and telecom infrastructure designs.
FAQ
What does the "C" suffix mean in SMBJ22C-E3/5B?
The "C" in SMBJ22C-E3/5B denotes a bidirectional configuration - meaning the device clamps voltage transients equally in both polarities. This is confirmed in Vishay's datasheet Document Number 88392, where "C" and "CA" are used interchangeably for bidirectional variants. The SMBJ22C-E3/5B has identical VBR, VC, and IPPM ratings in forward and reverse directions, making it ideal for differential signal line protection like RS-485 or CAN without polarity concerns. No external biasing is required for SMBJ22C-E3/5B operation.
Is SMBJ22C-E3/5B RoHS-compliant and halogen-free?
Yes, SMBJ22C-E3/5B is RoHS-compliant per EU Directive 2011/65/EU, as indicated by the "E3" suffix in its ordering code. However, it is not halogen-free - that designation requires the "M3" suffix (e.g., SMBJ22C-M3/5B). The "E3" variant uses standard molding compound meeting UL 94 V-0 flammability rating and matte tin-plated leads compliant with J-STD-002. Vishay confirms E3 parts are commercial-grade and suitable for non-automotive industrial applications where halogen content is not restricted.
What is the maximum clamping voltage of SMBJ22C-E3/5B under surge conditions?
The maximum clamping voltage (VC) of SMBJ22C-E3/5B is 35.5 V, measured at its peak pulse current (IPPM) of 16.9 A using the standardized 10/1000 µs waveform. This value is specified in Table 1 of Vishay's SMBJ5.0A–SMBJ188A datasheet (Document Number 88392, Rev. 09-Jan-2024) under the "SMBJ22A" row - applicable to SMBJ22C-E3/5B since unidirectional and bidirectional variants share identical VC and IPPM ratings. This clamping level ensures protected ICs experience less than 36 V stress during worst-case transients.
Can SMBJ22C-E3/5B be used in automotive applications?
SMBJ22C-E3/5B itself is commercial-grade and not AEC-Q101 qualified; however, Vishay offers the functionally identical SMBJ22CHE3_B variant (with "HE3" suffix) that is AEC-Q101 qualified for automotive use. The SMBJ22C-E3/5B shares the same electrical characteristics, SMB package, and thermal performance but lacks the extended reliability validation required for under-hood or safety-critical automotive systems. For non-safety automotive subsystems with relaxed qualification requirements, SMBJ22C-E3/5B may be used - but for production automotive designs, the HE3 variant is mandatory and traceable.
What is the thermal resistance of SMBJ22C-E3/5B, and how does it affect PCB layout?
The typical junction-to-ambient thermal resistance (RθJA) of SMBJ22C-E3/5B is 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as stated in the Thermal Characteristics table of Vishay's datasheet. This means a 1 W power dissipation raises junction temperature by 100 °C above ambient. To maintain TJ ≤ 150 °C at 50 °C ambient, average power must stay below 1 W - emphasizing the need for adequate copper area and avoiding dense thermal islands. Layouts should follow Vishay's recommended pad dimensions (0.085" × 0.220") to ensure SMBJ22C-E3/5B achieves rated surge performance.
SMBJ22C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 15.2A
- 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)
SMBJ22C-E3/5B FAQ
1.How can I place an order for SMBJ22C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22C-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 SMBJ22C-E3/5B reliable?
The price and inventory of SMBJ22C-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 SMBJ22C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ22C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22C-E3/5B?
SMBJ22C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22C-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 SMBJ22C-E3/5B?
For technical support, including SMBJ22C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22C-E3/5B requirements.
6.How does Aetrix verify that SMBJ22C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ22C-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 SMBJ22C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ22C-E3/5B?
All SMBJ22C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22C-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 SMBJ22C-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ22C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22C-E3/5B Tags
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