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Vishay General Semiconductor - Diodes Division SMBJ22CAHE3_B/I
- Part No.:
- SMBJ22CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22CAHE3_B/I.pdf
- Description:
- 600W,22V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,584
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Product details
Overview
SMBJ22CAHE3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. 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), clamping voltage of 35.5 V at 16.9 A, and operates across -55 °C to +150 °C junction temperature range - deployed on signal lines of industrial sensor units and telecom interfaces.
For engineers reviewing the SMBJ22CAHE3_B/I datasheet, SMBJ22CAHE3_B/I pinout, SMBJ22CAHE3_B/I application, or SMBJ22CAHE3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, UL 497B recognition, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of transients induced by inductive load switching and lightning surges. Its bidirectional architecture ensures symmetrical clamping in both polarities without polarity marking on the case.
The device complies with ANSI/IEEE C62.35 for transient suppressor definitions and meets Underwriters Laboratories recognition QVGQ2 under UL 497B for protectors. Thermal design relies on RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), with derating above 25 °C per Figure 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - guaranteed breakdown threshold range; ensures consistent turn-on behavior across production lots. |
| VC @ IPPM | 35.5 V at 16.9 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure level. |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform; supports high-energy ESD and surge events per IEC 61000-4-5. |
| ID @ VWM | 1.0 µA - reverse leakage at standoff voltage; minimizes standby power loss and avoids false triggering in low-current circuits. |
| TJ max. | +150 °C - maximum junction temperature; enables reliable operation in under-hood automotive and industrial ambient environments. |
| MSL Level | Level 1 per J-STD-020 - no floor life limitation; compatible with standard reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Accepts reverse surge current during negative polarity transients; forms symmetrical clamping path with cathode. |
| Cathode | Transient current entry (positive half-cycle) | Accepts reverse surge current during positive polarity transients; completes bidirectional conduction path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for ADAS sensor modules and infotainment power rails. |
| UL 497B recognized (QVGQ2) | Approved for use in telecom and industrial communication interfaces requiring certified surge protection per safety standards. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge waveforms without degradation when mounted on 5.0 mm × 5.0 mm copper pads. |
| Low profile SMB package | Enables high-density PCB layouts and compatibility with automated pick-and-place equipment; footprint matches industry-standard DO-214AA land pattern. |
| Glass passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift in harsh environmental conditions. |
Applications
| Industrial Sensor Interface Protection | Automotive CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) of pressure/temperature sensors exposed to relay coil flyback and EFT bursts in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair to limit transient excursions to ≤35.5 V while maintaining DC integrity. Use Value: Prevents latch-up or damage to downstream op-amps and ADCs during 1 kV/50 Ω EFT events, preserving measurement accuracy and system uptime. |
Use Scenario: Safeguarding CAN_H/CAN_L lines in body control modules against load dump and jump-start transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Symmetrical TVS pair (one per line) referenced to ground, absorbing common-mode surges up to ±35.5 V clamping level. Use Value: Maintains CAN FD bit timing integrity during ISO 7637-2 Pulse 5a (load dump) by limiting bus voltage excursion below transceiver overvoltage threshold. |
| Telecom Ethernet PHY Protection | Consumer USB Port ESD Suppression |
|
Use Scenario: Shielding 10/100BASE-TX transformer-coupled PHY interfaces from lightning-induced surges entering via outdoor cabling in PoE-powered access points. IC Role / Device Role / Timing Role: Bidirectional TVS installed between each twisted pair and chassis ground, activated only during >22 V transients. Use Value: Enables compliance with IEC 61000-4-5 Ed. 3 (surge immunity) without degrading 100 MHz signal integrity due to low junction capacitance (~100 pF at 0 V). |
Use Scenario: Guarding USB 2.0 D+/D− lines in portable media players against human-body-model (HBM) ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed adjacent to connector, shunting >8 kV HBM discharges to ground within <1 ns. Use Value: Prevents data corruption and port controller reset during repeated 8 kV contact discharge tests while sustaining full 480 Mbps signaling bandwidth. |
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 | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC/PPPM specs, identical SMB package and pinout. | Lacks automotive qualification; not approved for under-hood or safety-critical ECUs. | Select when cost-sensitive industrial or consumer designs do not require automotive reliability validation. |
| SMCJ22CAHE3_A/H | Higher-power variant (1500 W PPPM), larger SMC (DO-214AB) package, same VWM/VBR/VC ratings. | Requires larger PCB footprint and higher thermal mass; suited for higher-energy surge environments (e.g., AC mains input stages). | Choose when system-level surge testing exceeds 600 W requirements or when board layout allows SMC footprint. |
Compared with SMBJ22CAHE3_B/I, SMBJ22CA-E3/52 offers identical electrical performance at lower cost but lacks AEC-Q101 validation, while SMCJ22CAHE3_A/H delivers triple the pulse power in a physically larger package - making SMBJ22CAHE3_B/I optimal for space-constrained automotive sensor nodes needing certified reliability.
Availability
SMBJ22CAHE3_B/I is available at Aetrix Electronics and suitable for industrial sensor interface protection, automotive CAN bus line protection, telecom Ethernet PHY protection, and consumer USB port ESD suppression requiring stable component supply across long-lifecycle programs.
Supply support for SMBJ22CAHE3_B/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - delivering consistent clamping performance under repetitive surge stress and extended temperature cycling.
FAQ
What does the "CA" suffix indicate in SMBJ22CAHE3_B/I?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ22CAHE3_B/I provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ22A), it has no cathode band marking and conducts equally in either direction once the breakdown voltage is exceeded - essential for protecting AC-coupled or differential signal lines where polarity is undefined.
Is SMBJ22CAHE3_B/I RoHS-compliant and halogen-free?
Yes, SMBJ22CAHE3_B/I is RoHS-compliant and halogen-free, as confirmed by its "HM3"-derived suffix structure and Vishay's material categorization documentation (www.vishay.com/doc?99912). The "HE3" base indicates RoHS compliance and AEC-Q101 qualification, while the "_B/I" ordering code specifies 13″ tape-and-reel packaging - all meeting JEDEC J-STD-609A Class 2a for bromine/chlorine content.
What is the maximum clamping voltage of SMBJ22CAHE3_B/I and how is it measured?
The maximum clamping voltage of SMBJ22CAHE3_B/I is 35.5 V, measured at a peak pulse current (IPPM) of 16.9 A using a 10/1000 µs double-exponential surge waveform. This value is specified in the Electrical Characteristics table and represents the upper limit of voltage seen by protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Can SMBJ22CAHE3_B/I be used in place of a unidirectional TVS like SMBJ22A?
No - SMBJ22CAHE3_B/I is strictly bidirectional and cannot replace unidirectional SMBJ22A in DC-biased applications such as power rail protection, where forward conduction must be blocked. Attempting substitution risks unintended forward conduction during normal operation. Use SMBJ22CAHE3_B/I only where symmetrical clamping is required, e.g., data lines, AC signals, or differential buses.
Does SMBJ22CAHE3_B/I meet UL 497B certification?
Yes, SMBJ22CAHE3_B/I carries Underwriters Laboratories recognition QVGQ2 under UL 497B for protectors, covering both unidirectional and bidirectional configurations. This certification validates its suitability for use in telecommunications and industrial equipment requiring third-party safety approval for transient protection components - documented in Vishay's file number E136766.
SMBJ22CAHE3_B/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):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 16.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ22CAHE3_B/I FAQ
1.How can I place an order for SMBJ22CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22CAHE3_B/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 SMBJ22CAHE3_B/I reliable?
The price and inventory of SMBJ22CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ22CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ22CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22CAHE3_B/I?
SMBJ22CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22CAHE3_B/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 SMBJ22CAHE3_B/I?
For technical support, including SMBJ22CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ22CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ22CAHE3_B/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 SMBJ22CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ22CAHE3_B/I?
All SMBJ22CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22CAHE3_B/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 SMBJ22CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ22CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22CAHE3_B/I Tags
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