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Vishay General Semiconductor - Diodes Division SMBJ20CAHE3/5B
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- Part No.:
- SMBJ20CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ20CAHE3/5B.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,218
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Product details
Overview
SMBJ20CAHE3/5B from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 32.4 V maximum clamping voltage (VC) at 18.5 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits against ESD and inductive switching surges.
For engineers reviewing the SMBJ20CAHE3/5B datasheet, SMBJ20CAHE3/5B pinout, SMBJ20CAHE3/5B application, or SMBJ20CAHE3/5B equivalent, this device is evaluated for bidirectional surge protection in automotive-grade (AEC-Q101 qualified), industrial, and telecom systems where low clamping voltage, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical selection criteria.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VC, and IPPM specifications in forward and reverse directions. Its glass-passivated junction ensures stable leakage performance (≤1.0 µA at VWM) and robust surge handling up to 18.5 A under standardized 10/1000 µs transients.
The device is rated for continuous operation from –55 °C to +150 °C junction temperature, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). It meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 for automotive applications when ordered with HE3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 22.2 V / 24.5 V at 1 mA - Verified breakdown range ensuring reliable triggering during overvoltage events without premature conduction. |
| VC @ IPPM | 32.4 V at 18.5 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to safe levels in protected circuits. |
| PPPM | 600 W - Peak pulse power dissipation capability; supports high-energy transients common in motor drives and relay switching. |
| IPPM | 18.5 A - Peak pulse current handling capacity under standard 10/1000 µs waveform; determines minimum trace width and PCB layout robustness. |
| Junction Temp Range | –55 °C to +150 °C - Enables deployment in under-hood automotive, industrial control cabinets, and outdoor telecom enclosures. |
| Leakage Current | ≤1.0 µA at 20 V - Ensures minimal standby power loss and signal integrity in high-impedance sensor or analog front-end paths. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path terminal | Either end connects to protected line; no cathode band marking - enables flexible PCB layout without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN bus, differential sensors) without polarity concerns. |
| AEC-Q101 qualification | Validated reliability for automotive powertrain and body electronics - supports long-term operation under thermal cycling and vibration stress. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow soldering at peak 260 °C - eliminates moisture sensitivity handling requirements in SMT production. |
| 600 W peak pulse power | Withstands repetitive 10/1000 µs surges at 0.01% duty cycle - suitable for industrial motor control I/O and power supply input stages. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during clamping - preserves margin for 24 V system ICs with 36 V absolute maximum ratings. |
Applications
| Industrial Motor Control | Automotive Body Electronics |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing lines in 24 V DC motor controllers exposed to inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Bidirectional TVS placed across H-bridge outputs and current-sense amplifier inputs to clamp transients before they reach precision analog circuitry. Use Value: Limits clamped voltage to 32.4 V, preventing latch-up or oxide damage in 36 V-rated op-amps and comparators used in closed-loop current regulation. |
Use Scenario: Surge suppression on LIN bus and interior lighting control lines in door modules and seat control units. IC Role / Device Role / Timing Role: Standoff-rated TVS installed at connector entry points to absorb ISO 7637-2 Pulse 1/2a/3a transients before reaching microcontroller GPIOs and LED drivers. Use Value: AEC-Q101 qualification ensures compliance with automotive reliability standards while maintaining ≤1 µA leakage to avoid battery drain in always-on modules. |
| Telecom Power Interface | Consumer Sensor Hub |
|
Use Scenario: Input-stage protection for 24 V PoE-powered base stations and remote radio units subjected to lightning-induced surges on DC feed lines. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converters and hot-swap controllers, sized to handle 600 W transient energy per IEC 61000-4-5. Use Value: 32.4 V clamping voltage allows use with 28 V-rated input capacitors and provides ≥4 V margin to prevent converter shutdown during surge events. |
Use Scenario: ESD and cable discharge protection for I²C/SPI lines connecting environmental sensors (temperature, humidity, motion) to host MCU in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at sensor connector to shunt ±8 kV contact ESD (IEC 61000-4-2) before signal integrity degrades. Use Value: Symmetrical structure eliminates need for dual unidirectional devices; 1.0 µA leakage avoids loading high-impedance sensor bias networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA-M3/5B | Same electrical specs, halogen-free RoHS-compliant version; identical thermal and surge performance. | No AEC-Q101 qualification - intended for commercial/industrial use only. | Select when halogen-free compliance is required and automotive qualification is not needed. |
| SMCJ20CAHE3/5B | Same VWM/VBR/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating. | Higher power handling requires larger PCB footprint; suited for primary-side AC/DC input protection. | Choose when system-level surge immunity exceeds 600 W, such as in DIN-rail power supplies or outdoor equipment. |
Compared with SMBJ20CA-M3/5B, the SMBJ20CAHE3/5B adds AEC-Q101 qualification for automotive use; compared with SMCJ20CAHE3/5B, it trades power headroom (600 W vs. 1500 W) for compact SMB footprint and lower parasitic inductance in high-speed signal protection.
Availability
SMBJ20CAHE3/5B is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and telecom power interface applications requiring stable component supply, AEC-Q101 validation, and MSL Level 1 reflow compatibility.
Supply support for SMBJ20CAHE3/5B 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for robust transient suppression in space-constrained, high-reliability environments - targeting automotive, industrial automation, and infrastructure equipment where consistent clamping performance and long-term stability are mandatory.
FAQ
What is the clamping voltage of SMBJ20CAHE3/5B at its rated peak pulse current?
The SMBJ20CAHE3/5B has a maximum clamping voltage (VC) of 32.4 V when subjected to its rated 18.5 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable voltage limiting during surge events - a key parameter for verifying safe operating margins of downstream ICs in the SMBJ20CAHE3/5B-protected circuit.
Is SMBJ20CAHE3/5B suitable for automotive applications?
Yes, SMBJ20CAHE3/5B is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which denotes RoHS-compliant and automotive-grade qualification. It is validated for use in body electronics, lighting control, and infotainment interfaces where temperature cycling, vibration, and long-term reliability under –40 °C to +125 °C ambient conditions are required - making SMBJ20CAHE3/5B appropriate for Tier 1 and OEM automotive designs.
How does the bidirectional design of SMBJ20CAHE3/5B affect its circuit placement?
The SMBJ20CAHE3/5B has no polarity marking and identical electrical behavior in both directions, allowing it to be placed across any two points needing symmetrical overvoltage protection - such as differential data lines (RS-485, CAN), AC-coupled signals, or floating power rails. This eliminates orientation constraints during automated placement and simplifies layout versus using two unidirectional devices, directly enhancing design flexibility and reducing BOM count for the SMBJ20CAHE3/5B implementation.
What is the maximum leakage current specification for SMBJ20CAHE3/5B at its stand-off voltage?
The SMBJ20CAHE3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 20 V stand-off voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal impact on high-impedance sensor bias networks, battery-powered circuits, and precision analog signal paths - a verified parameter critical for maintaining accuracy and power efficiency in systems utilizing SMBJ20CAHE3/5B for transient protection.
Does SMBJ20CAHE3/5B require special handling during PCB assembly?
No - SMBJ20CAHE3/5B is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and can withstand standard lead-free reflow profiles with a maximum peak temperature of 260 °C. No baking or dry-pack handling is required, simplifying SMT manufacturing and enabling direct use from reel in high-volume production - a verified advantage for assembly lines deploying SMBJ20CAHE3/5B in industrial and automotive electronics.
SMBJ20CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ20CAHE3/5B FAQ
1.How can I place an order for SMBJ20CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ20CAHE3/5B 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 SMBJ20CAHE3/5B reliable?
The price and inventory of SMBJ20CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ20CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ20CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ20CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ20CAHE3/5B?
SMBJ20CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ20CAHE3/5B 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 SMBJ20CAHE3/5B?
For technical support, including SMBJ20CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ20CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ20CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ20CAHE3/5B 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 SMBJ20CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ20CAHE3/5B?
All SMBJ20CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ20CAHE3/5B, 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 SMBJ20CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ20CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ20CAHE3/5B Tags
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