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Vishay General Semiconductor - Diodes Division SMBG20CAHE3/5B
- Part No.:
- SMBG20CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG20CAHE3/5B.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,889
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Product details
Overview
SMBG20CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 32.4 V at 18.5 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG20CAHE3/5B datasheet, SMBG20CAHE3/5B pinout, SMBG20CAHE3/5B application, or SMBG20CAHE3/5B equivalent, key selection criteria include bidirectional surge suppression capability, low clamping ratio (VC/VBR ≈ 1.39), MSL Level 1 moisture sensitivity, matte tin-plated leads compliant with J-STD-002, and suitability for 12 V automotive power rail and sensor line protection.
Technical Context
This TVS operates symmetrically in both polarities due to its bidirectional construction, enabling protection against positive and negative transients without polarity constraints. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1 ns), critical for safeguarding MOSFET gates and microcontroller I/O lines.
The device uses a low incremental surge resistance design to minimize voltage overshoot during high-current surges, and its thermal resistance (RθJA = 100 °C/W) supports operation up to +150 °C junction temperature when mounted on 5.0 mm × 5.0 mm copper pads - essential for under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping begins; sets protection threshold for 12 V nominal systems. |
| VBR (min/max) | 22.2 V / 24.5 V at 1 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM while avoiding false triggering. |
| VC @ IPPM | 32.4 V at 18.5 A - Clamping voltage limits transient energy delivered to downstream circuitry during 600 W surge events. |
| PPPM | 600 W (10/1000 µs) - Sustains standardized lightning/surge pulses per IEC 61000-4-5 without degradation. |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage preserves signal integrity and battery life in always-on automotive modules. |
| TJ max | +150 °C - Enables deployment in engine control units (ECUs), body control modules (BCMs), and ADAS sensors exposed to high ambient heat. |
| AEC-Q101 | Qualified - Validated for automotive applications including load dump, ISO 7637-2 pulse 5a/b, and ESD immunity per ISO 10605. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with matte tin-plated leads; no polarity marking required for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Accepts reverse surge current during negative transients; symmetrical with cathode for bidirectional conduction. |
| Cathode | Transient current entry (positive half-cycle) | Accepts forward surge current during positive transients; functionally identical to anode in bidirectional configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN bus, LIN, sensor differential pairs) without external polarity management. |
| 600 W peak pulse power | Withstands repetitive 10/1000 µs surges at 0.01% duty cycle - sufficient for automotive load dump and inductive switching events. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure per JESD22-A101. |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow profiles without pre-baking, reducing manufacturing complexity and cost. |
| AEC-Q101 qualification | Validated for automotive use via stress tests including HTOL, TCT, UHAST, and ESD-HBM/MM, confirming reliability in harsh vehicle environments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in body control modules (BCMs) and infotainment head units from ISO 7637-2 load dump pulses and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC/DC converters and LDOs to limit input voltage excursion during transients. Use Value: Clamps to 32.4 V at 18.5 A, preventing damage to downstream regulators rated for ≤36 V absolute maximum input. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) and digital sensor interfaces (I²C, SPI) in factory automation PLCs exposed to EMI and relay coil kickback. IC Role / Device Role / Timing Role: Bidirectional shunt protector across signal and ground, absorbing ±1 kV ESD (IEC 61000-4-2) and ±400 V surge (IEC 61000-4-4). Use Value: Sub-1 ns response time and <1.0 µA leakage preserve signal fidelity and measurement accuracy in precision industrial sensing. |
| Automotive CAN Transceiver Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding high-speed CAN FD transceivers (e.g., TCAN1042, SN65HVD256) from coupled transients on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Low-capacitance (typ. 200 pF at 0 V) bidirectional clamp placed directly at connector interface to minimize stub length. Use Value: Maintains CAN signal integrity up to 5 Mbps by limiting capacitive loading and ensuring clamping occurs before transceiver damage threshold (~40 V). | Use Scenario: Suppressing inductive spikes generated by brushed DC motor commutation in smart home appliances (e.g., washing machine drum drives, HVAC blowers). IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to divert flyback energy away from MCU GPIOs and H-bridge drivers. Use Value: 600 W rating handles repeated 100–500 ms motor stall surges; AEC-Q101 qualification ensures longevity in thermally demanding appliance enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG20CA-M3/5B | Same electrical specs and AEC-Q101 qualification; halogen-free molding compound (per IEC 61249-2-21) vs. HE3's RoHS-compliant industrial grade. | Preferred where halogen-free compliance is mandated by OEM environmental policies (e.g., EU auto Tier 1 requirements). | Select SMBG20CA-M3/5B only if halogen-free certification is contractually required; otherwise SMBG20CAHE3/5B offers identical protection performance. |
| SMAJ20CA-E3/5B | Lower peak pulse power (400 W vs. 600 W); SMA package (DO-214AC) vs. SMBG (DO-215AA); higher RθJA (130 °C/W). | Suitable for space-constrained consumer designs but not recommended for automotive under-hood use requiring 600 W surge handling. | Choose SMAJ20CA-E3/5B only for non-automotive, lower-energy applications where PCB area is critical and 400 W rating suffices. |
Compared with SMBG20CA-M3/5B, SMBG20CAHE3/5B provides identical surge protection performance with standard RoHS compliance, while SMAJ20CA-E3/5B trades 33% lower power handling and higher thermal resistance for smaller footprint - making SMBG20CAHE3/5B optimal for automotive and industrial 600 W-class protection.
Availability
SMBG20CAHE3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, and consumer appliance motor controllers requiring stable component supply with AEC-Q101 assurance and 13" tape-and-reel delivery.
Supply support for SMBG20CAHE3/5B 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, efficiency, and application-specific optimization.
The SMBG series was engineered specifically for high-reliability transient suppression in automotive and industrial environments, combining AEC-Q101 validation, robust surge ratings, and surface-mount compatibility for automated assembly.
FAQ
What is the clamping voltage of SMBG20CAHE3/5B at its rated peak pulse current?
The SMBG20CAHE3/5B has a maximum clamping voltage (VC) of 32.4 V at 18.5 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per standard test methods and defines the upper voltage limit imposed on protected circuits during surge events - a critical parameter for ensuring downstream ICs remain within their absolute maximum ratings. The SMBG20CAHE3/5B maintains this clamping performance across its qualified operating temperature range.
Is SMBG20CAHE3/5B suitable for automotive applications?
Yes, SMBG20CAHE3/5B is AEC-Q101 qualified and explicitly designed for automotive use, including engine control units, body electronics, and ADAS subsystems. Its 600 W surge rating, 150 °C maximum junction temperature, MSL Level 1 reflow compatibility, and validation against ISO 7637-2 and ISO 10605 make it appropriate for under-hood and cabin applications. The SMBG20CAHE3/5B meets stringent automotive reliability requirements without derating in typical vehicle thermal environments.
How does the bidirectional nature of SMBG20CAHE3/5B affect its circuit placement?
The SMBG20CAHE3/5B has no polarity marking and conducts identically in both directions, allowing direct placement across any two nodes requiring symmetrical overvoltage protection - such as CAN_H/CAN_L differential pairs, AC-coupled audio lines, or ungrounded sensor outputs. Unlike unidirectional TVS diodes, the SMBG20CAHE3/5B eliminates orientation errors during automated placement and avoids the need for dual-device solutions. Its bidirectional behavior is intrinsic to the device structure, not dependent on external biasing.
What is the leakage current specification for SMBG20CAHE3/5B at its stand-off voltage?
At its 20 V stand-off voltage (VWM), the SMBG20CAHE3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C. This ultra-low leakage ensures minimal power loss in battery-powered systems and prevents signal distortion in high-impedance sensor interfaces. The SMBG20CAHE3/5B maintains leakage below 5 µA even at elevated temperatures up to 125 °C, supporting reliable operation in thermally demanding applications.
Does SMBG20CAHE3/5B require special PCB layout considerations?
Yes - to achieve rated 600 W surge performance, the SMBG20CAHE3/5B must be mounted on minimum 5.0 mm × 5.0 mm copper pads per terminal, as specified in Vishay's datasheet. Short, wide traces reduce inductance and improve clamping response; thermal vias beneath pads enhance heat dissipation. The SMBG20CAHE3/5B's DO-215AA outline requires precise stencil aperture design for consistent solder paste deposition, and its lack of polarity marking simplifies placement but demands verification of pad symmetry in CAD layout.
SMBG20CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG20CAHE3/5B FAQ
1.How can I place an order for SMBG20CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG20CAHE3/5B 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 SMBG20CAHE3/5B reliable?
The price and inventory of SMBG20CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG20CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG20CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG20CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG20CAHE3/5B?
SMBG20CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG20CAHE3/5B 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 SMBG20CAHE3/5B?
For technical support, including SMBG20CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG20CAHE3/5B requirements.
6.How does Aetrix verify that SMBG20CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG20CAHE3/5B 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 SMBG20CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG20CAHE3/5B?
All SMBG20CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG20CAHE3/5B, 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 SMBG20CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBG20CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG20CAHE3/5B Tags
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