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Vishay General Semiconductor - Diodes Division SMBJ20CAHE3_B/I
- Part No.:
- SMBJ20CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ20CAHE3_B/I.pdf
- Description:
- 600W,20V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,498
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Product details
Overview
SMBJ20CAHE3_B/I 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 power and signal lines. It features a 20 V stand-off voltage (VWM), 32.4 V maximum clamping voltage (VC) at 18.5 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), commonly deployed to protect MOSFETs and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ20CAHE3_B/I datasheet, SMBJ20CAHE3_B/I pinout, SMBJ20CAHE3_B/I application, or SMBJ20CAHE3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protection element, responding within picoseconds to transient overvoltages induced by inductive switching or ESD events. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity-sensitive layout constraints.
The junction is glass passivated for stable leakage performance and long-term reliability under repetitive surge stress. With a maximum operating junction temperature of +150 °C and MSL Level 1 rating (peak reflow 260 °C), it supports high-reliability industrial and automotive-grade PCB assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20 V - Maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 22.2–24.5 V at 1 mA - Guaranteed avalanche initiation range; ensures predictable turn-on during transients |
| VC (Clamping Voltage) | 32.4 V at 18.5 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; determines downstream component stress |
| PPPM (Peak Pulse Power) | 600 W - Sustains standardized lightning/surge energy without failure; validated per IEC 61000-4-5 requirements |
| IPPM (Peak Pulse Current) | 18.5 A - Maximum non-repetitive surge current handled; directly tied to PCB pad thermal design (0.2" × 0.2") |
| TJ max. | +150 °C - Enables operation in under-hood or enclosed industrial enclosures without derating |
| RθJA | 100 °C/W - Defines thermal rise per watt dissipated; informs heatsinking needs for sustained surge duty cycles |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Molding compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity surge) | One terminal of symmetrical PN junction; conducts when voltage exceeds VBR in reverse direction |
| Cathode | Transient current entry (positive polarity surge) | Second terminal of symmetrical PN junction; conducts identically to anode under opposite polarity surge |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use per stress test standard; supports under-hood and ADAS module deployment |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without degradation |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), improving protection margin |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow without moisture-induced damage or delamination |
| Glass passivated junction | Ensures stable leakage current (<1 µA at VWM) across temperature and lifetime, critical for low-power sensor rails |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and current-sense amplifiers against inductive kickback from relay coils and solenoid loads. IC Role / Device Role: Bidirectional clamping TVS placed across DC bus or signal inputs to limit transient excursions to safe levels. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic interfaces while maintaining <1 µA leakage at 20 V nominal rail. |
Use Scenario: Surge suppression on LIN bus lines and door module sensor inputs exposed to load dump and jump-start conditions. IC Role / Device Role: Primary front-end protection device meeting ISO 7637-2 Pulse 1/2a/5a immunity requirements. Use Value: Clamps 32.4 V at 18.5 A without requiring series impedance, enabling direct connection to AEC-Q100 qualified transceivers. |
| Industrial PLC I/O Modules | Consumer Appliance Control Boards |
Use Scenario: Input protection for analog sensor channels (e.g., thermistor, pressure transducer) connected to factory floor wiring. IC Role / Device Role: Low-capacitance (<50 pF at 0 V) bidirectional clamp minimizing signal distortion on 0–10 V or 4–20 mA loops. Use Value: Maintains signal integrity while providing 600 W surge handling-critical for compliance with IEC 61000-4-4 EFT testing. |
Use Scenario: Overvoltage protection on microcontroller reset lines and communication pins (UART, I²C) in washing machines and HVAC controllers. IC Role / Device Role: Cost-effective, RoHS-compliant TVS integrated into compact SMT layout with zero polarity concerns. Use Value: Eliminates need for dual unidirectional devices; reduces BOM count and layout area while supporting automated placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA-E3/52 | Same electrical specs and SMB package; RoHS-compliant commercial grade (non-AEC-Q101) | Lacks automotive qualification; not approved for under-hood or safety-critical modules | Select when cost sensitivity outweighs automotive qualification requirements |
| SAC20CA | Same VWM/VC but in smaller SOD-123FL package; lower IPPM (12.5 A) and PPPM (400 W) | Insufficient for IEC 61000-4-5 Level 4; limited to low-energy signal-line protection | Choose only for space-constrained, low-surge environments like consumer USB ports |
Compared with SMBJ20CAHE3_B/I, SMBJ20CA-E3/52 offers identical protection performance without AEC-Q101 validation, while SAC20CA trades robustness for footprint reduction-making SMBJ20CAHE3_B/I the sole choice for automotive-grade 600 W clamping in SMB form factor.
Availability
SMBJ20CAHE3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and PLC I/O modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ20CAHE3_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, and protection devices with emphasis on reliability, precision, and automotive qualification.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh environments, targeting industrial automation, automotive electronics, and telecom infrastructure where 600 W surge handling and AEC-Q101 compliance are mandatory.
FAQ
What does the "HE3" suffix indicate in SMBJ20CAHE3_B/I?
The "HE3" suffix in SMBJ20CAHE3_B/I denotes RoHS-compliant construction with AEC-Q101 qualification. This distinguishes it from commercial-grade variants (e.g., "E3") and confirms suitability for automotive applications including body electronics and infotainment systems where stress testing per AEC-Q101 is required.
Is SMBJ20CAHE3_B/I unidirectional or bidirectional?
SMBJ20CAHE3_B/I is a bidirectional TVS diode, as confirmed by the "CA" suffix and documentation stating "electrical characteristics apply in both directions." It has no polarity marking and provides symmetrical clamping for positive and negative transients-ideal for AC-coupled or floating signal lines.
What is the maximum clamping voltage of SMBJ20CAHE3_B/I at rated surge current?
The maximum clamping voltage (VC) of SMBJ20CAHE3_B/I is 32.4 V at 18.5 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Does SMBJ20CAHE3_B/I require heatsinking in typical applications?
SMBJ20CAHE3_B/I does not require external heatsinking for single-event surge suppression due to its short-duration energy absorption. Its RθJA of 100 °C/W assumes mounting on 0.2" × 0.2" copper pads per datasheet; thermal design focuses on PCB copper area rather than added heatsinks for transient duty cycles.
How does SMBJ20CAHE3_B/I differ from the SMBJ20A variant?
SMBJ20CAHE3_B/I is bidirectional with AEC-Q101 qualification and HE3 packaging, whereas SMBJ20A is unidirectional, lacks automotive qualification, and uses E3/M3 suffixes. The "CA" vs. "A" suffix directly indicates bidirectional vs. unidirectional functionality-critical for correct circuit integration and polarity handling.
SMBJ20CAHE3_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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 18.5A
- 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)
SMBJ20CAHE3_B/I FAQ
1.How can I place an order for SMBJ20CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ20CAHE3_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 SMBJ20CAHE3_B/I reliable?
The price and inventory of SMBJ20CAHE3_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 SMBJ20CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ20CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ20CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ20CAHE3_B/I?
SMBJ20CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ20CAHE3_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 SMBJ20CAHE3_B/I?
For technical support, including SMBJ20CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ20CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ20CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ20CAHE3_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 SMBJ20CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ20CAHE3_B/I?
All SMBJ20CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ20CAHE3_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 SMBJ20CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ20CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ20CAHE3_B/I Tags
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Diodes Incorporated
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