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Vishay General Semiconductor - Diodes Division SMBG20CAHE3/52
- Part No.:
- SMBG20CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG20CAHE3/52.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,230
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Product details
Overview
SMBG20CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, rated for 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR), 600 W peak pulse power (10/1000 µs), and AEC-Q101 qualified for automotive electronics protection against inductive switching transients and ESD events.
For engineers reviewing the SMBG20CAHE3/52 datasheet, SMBG20CAHE3/52 pinout, SMBG20CAHE3/52 application, or SMBG20CAHE3/52 equivalent, this device is selected for robust overvoltage clamping in bidirectional signal lines, automotive sensor interfaces, and industrial I/O protection where low clamping voltage (32.4 V at IPPM) and fast response (<1 ns) are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical VBR min/max (22.2 V / 24.5 V at 1 mA), clamps to ≤32.4 V at 18.5 A peak pulse current (10/1000 µs), and exhibits ≤1.0 µA reverse leakage at 20 V stand-off. Its glass-passivated junction ensures stable avalanche performance under repetitive surge conditions.
Designed for surface-mount automated assembly, SMBG20CAHE3/52 meets J-STD-020 MSL Level 1 (260 °C peak reflow), has RθJA = 100 °C/W, and supports operation from –55 °C to +150 °C junction temperature - enabling use in under-hood automotive modules and industrial control terminals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected lines. |
| VBR (min/max) | 22.2 V / 24.5 V at 1 mA - Confirmed breakdown threshold range; ensures reliable triggering above normal operating voltage. |
| VC @ IPPM | 32.4 V at 18.5 A - Clamped voltage during 600 W surge; determines maximum stress on downstream ICs like CAN transceivers or microcontrollers. |
| PPPM | 600 W (10/1000 µs) - Peak surge power handling capability; validates suitability for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 threats. |
| IPPM | 18.5 A - Peak pulse current corresponding to 600 W clamping; used to size PCB trace width and verify thermal margin. |
| TJ max | +150 °C - Maximum junction temperature; enables placement near heat sources in engine control units without derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, and ESD testing per AEC specification; required for Tier-1 supply chain compliance. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking - both terminals are electrically symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output for transient energy; no cathode band marking; requires no orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports high-energy transients common in 12 V automotive systems (e.g., load dump, inductive kickback) without failure. |
| AEC-Q101 qualification | Validates long-term reliability in automotive environments including temperature cycling, humidity, and vibration stress. |
| Low clamping voltage (32.4 V) | Keeps protected ICs (e.g., LIN transceivers, sensor ASICs) below absolute maximum ratings during surge events. |
| MSL Level 1 (260 °C) | Enables standard lead-free reflow soldering without pre-baking; reduces manufacturing complexity and cost. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage over lifetime, even under thermal and humidity stress. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting analog/digital sensor outputs (e.g., pressure, temperature, position sensors) in engine control modules from load-dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between sensor output line and ground, absorbing positive/negative transients before they reach MCU ADC or comparator inputs. Use Value: Prevents sensor signal corruption and MCU latch-up by limiting voltage excursions to ≤32.4 V during 10/1000 µs surges up to 600 W. | Use Scenario: Safeguarding PLC digital input channels connected to external field devices (e.g., limit switches, proximity sensors) exposed to inductive switching noise. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input line to shunt surge energy to common ground, maintaining logic-level integrity during 2 kV EFT bursts. Use Value: Enables reliable operation in noisy factory environments by clamping transients within 1 ns while sustaining ≤1.0 µA leakage at 20 V nominal bus voltage. |
| Automotive LIN Bus Protection | Consumer Appliance Motor Control |
Use Scenario: Securing LIN bus physical layer in body electronics (e.g., door modules, seat controllers) against battery reverse connection and jump-start spikes. IC Role / Device Role / Timing Role: Bidirectional TVS placed across LIN data line and ground to clamp both polarity faults while preserving signal rise/fall times. Use Value: Maintains LIN compliance (ISO 17987-4) by limiting clamping voltage to 32.4 V and adding <0.5 pF junction capacitance at 0 V bias. | Use Scenario: Shielding microcontroller GPIOs driving brushed DC motors in smart appliances (e.g., washing machine control boards) from back-EMF spikes. IC Role / Device Role / Timing Role: Localized TVS at motor driver output stage to absorb inductive kickback before it propagates into logic circuitry. Use Value: Eliminates need for external snubbers by providing 600 W surge absorption in same footprint as discrete diode, reducing BOM count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA-E3/52 | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating), different package (SMB vs. SMBG); slightly larger footprint (DO-214AA vs. DO-215AA). | Compatible for board-level redesign; not drop-in due to 0.2 mm height difference and pad layout variance. | Select when legacy SMB footprint is fixed and AEC-Q101 is not required (SMBJ20CA-E3/52 is industrial grade only). |
| SMCJ20CAHE3/52 | Higher PPPM = 1500 W, same VWM/VBR, larger SMC (DO-214AB) package; RθJA = 35 °C/W vs. 100 °C/W. | Used where higher surge margin is needed (e.g., alternator output lines); requires larger PCB area and thermal relief. | Choose for enhanced ruggedness in high-energy zones; avoid if space-constrained or thermal dissipation is limited. |
Compared with SMBJ20CA-E3/52 and SMCJ20CAHE3/52, SMBG20CAHE3/52 delivers AEC-Q101 qualification in the smallest footprint (SMBG), making it optimal for space-limited automotive modules requiring certified reliability without sacrificing surge rating.
Availability
SMBG20CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and consumer appliance motor control requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBG20CAHE3/52 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, automotive-qualified components.
The SMBG series targets compact, high-power transient suppression in automotive and industrial applications, specifically engineered to meet AEC-Q101 requirements while minimizing PCB footprint and thermal resistance.
FAQ
What is the clamping voltage of SMBG20CAHE3/52 at its rated peak pulse current?
The SMBG20CAHE3/52 clamps to a maximum of 32.4 V at its peak pulse current of 18.5 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - a critical parameter for ensuring downstream ICs remain within their absolute maximum ratings. The SMBG20CAHE3/52 achieves this with low incremental surge resistance and fast avalanche response.
Is SMBG20CAHE3/52 suitable for automotive applications?
Yes, SMBG20CAHE3/52 is AEC-Q101 qualified and explicitly designed for automotive use. It undergoes stress testing for high-temperature operation (–55 °C to +150 °C), thermal cycling, and humidity resistance. The HE3 suffix denotes RoHS-compliant, AEC-Q101-qualified construction, making SMBG20CAHE3/52 appropriate for engine control units, body electronics, and ADAS sensor interfaces where reliability under harsh conditions is mandatory.
Does SMBG20CAHE3/52 have polarity markings on the package?
No, SMBG20CAHE3/52 is a bidirectional TVS diode and carries no polarity marking - there is no cathode band or anode indicator on the SMBG (DO-215AA) case. Both terminals are functionally identical, allowing unrestricted orientation during automated placement. This simplifies PCB layout and eliminates risk of incorrect installation, unlike unidirectional variants which feature a visible cathode band.
What is the maximum reverse leakage current for SMBG20CAHE3/52 at its stand-off voltage?
At its 20 V stand-off voltage (VWM), SMBG20CAHE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C. This low leakage ensures minimal power loss and signal distortion in always-on circuits such as LIN bus or sensor bias networks. Leakage remains within specification across the full operating temperature range, supporting stable performance in ambient temperatures up to +125 °C.
Can SMBG20CAHE3/52 be used in place of a unidirectional TVS like SMBG20AHE3/52?
No - SMBG20CAHE3/52 is bidirectional and cannot replace unidirectional types like SMBG20AHE3/52 in DC-biased applications where forward conduction must be blocked in one direction. While both share identical VWM and VBR values, SMBG20AHE3/52 conducts only in reverse avalanche and blocks forward current, whereas SMBG20CAHE3/52 clamps symmetrically in both directions. Substitution requires verifying circuit topology supports bidirectional clamping.
SMBG20CAHE3/52 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)
SMBG20CAHE3/52 FAQ
1.How can I place an order for SMBG20CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG20CAHE3/52 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 SMBG20CAHE3/52 reliable?
The price and inventory of SMBG20CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG20CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG20CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG20CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG20CAHE3/52?
SMBG20CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG20CAHE3/52 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 SMBG20CAHE3/52?
For technical support, including SMBG20CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG20CAHE3/52 requirements.
6.How does Aetrix verify that SMBG20CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG20CAHE3/52 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 SMBG20CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG20CAHE3/52?
All SMBG20CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG20CAHE3/52, 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 SMBG20CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBG20CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG20CAHE3/52 Tags
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