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Vishay General Semiconductor - Diodes Division SMBG40CAHE3/52
- Part No.:
- SMBG40CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG40CAHE3/52.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,337
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Product details
Overview
SMBG40CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of signal and power lines. It features a 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 64.5 V at 9.3 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG40CAHE3/52 datasheet, SMBG40CAHE3/52 pinout, SMBG40CAHE3/52 application, or SMBG40CAHE3/52 equivalent, key selection criteria include bidirectional surge handling, low clamping ratio (VC/VBR ≈ 1.38), MSL Level 1 reflow compatibility, TJ = –55 °C to +150 °C operation, and RoHS-compliant, AEC-Q101-qualified construction for harsh-environment designs.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding VWM, it avalanches symmetrically in both directions to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance enables rapid energy absorption without thermal runaway.
The SMBG40CAHE3/52 is optimized for repetitive 10/1000 µs waveforms at 0.01% duty cycle, with thermal resistance RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads) and RθJL = 20 °C/W, supporting reliable operation under sustained surge stress in automotive and industrial control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR (min/max) | 44.4 V / 49.1 V at 1 mA - Confirmed bidirectional avalanche threshold range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 64.5 V at 9.3 A - Clamped voltage during full 600 W surge; limits downstream IC stress to safe levels. |
| PPPM | 600 W - Peak pulse power rating per 10/1000 µs waveform; validates protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | <1.0 µA - Reverse leakage at stand-off voltage; preserves signal integrity and battery life in always-on circuits. |
| TJ Range | –55 °C to +150 °C - Full automotive temperature range support; enables deployment in engine control units and ADAS sensors. |
| Qualification | AEC-Q101 qualified - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 6.48 mm × 3.94 mm × 2.16 mm (L × W × H); matte tin-plated leads; UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Provides symmetrical conduction path during negative-going surges; connects to protected line without polarity constraint. |
| Cathode | Transient current entry (positive half-cycle) | Provides symmetrical conduction path during positive-going surges; enables bidirectional clamping without external diode pairing. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN bus, sensor differential pairs) without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 4 kV surge tests (line-to-earth) when mounted on recommended 5.0 mm × 5.0 mm copper pads. |
| AEC-Q101 qualification | Validates reliability for automotive applications including powertrain, body electronics, and infotainment systems per JEDEC stress protocols. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow assembly without pre-baking; eliminates moisture-related popcorning risk. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage drift over time and temperature, critical for long-life industrial deployments. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt TVS diode placed at power input stage to clamp spikes up to ±100 V before they reach LDOs and microcontrollers. Use Value: Limits clamped voltage to 64.5 V, preventing damage to 75 V-rated input capacitors and enabling use of lower-cost 63 V-rated downstream components. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input cards. IC Role / Device Role / Timing Role: Bidirectional clamp on 4–20 mA loop or 0–10 V signal line to absorb ESD and field-induced surges. Use Value: Symmetric clamping ensures protection during both positive and negative transients without adding series impedance or signal distortion. |
| Automotive CAN Bus Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding high-speed CAN FD transceivers (e.g., TCAN1042) from ESD and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Low-capacitance (CJ ≈ 100 pF at 0 V) bidirectional TVS placed directly at connector interface. Use Value: Maintains signal integrity up to 5 Mbps by minimizing added capacitance while delivering 600 W surge immunity. | Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: Across-the-line TVS on motor terminals to clamp flyback voltages during MOSFET switching transitions. Use Value: Absorbs repetitive 600 W surges without degradation, extending motor driver lifespan and reducing EMC filter burden. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40CA-E3/52 | Same VWM/VBR/VC specs but rated for 600 W with larger SMB (DO-214AA) package; RθJA = 65 °C/W vs. 100 °C/W. | Higher thermal mass supports higher average surge duty cycles; less suitable for ultra-thin PCBs with tight height constraints. | Select SMBJ40CA-E3/52 when board space allows and thermal derating margin is critical; SMBG40CAHE3/52 preferred for compact automotive modules. |
| SMCJ40CAHE3/52 | Same electrical specs but in larger SMC (DO-214AB) package; PPPM = 1500 W; RθJA = 35 °C/W; higher IPPM = 23.3 A. | Designed for higher-energy threats (e.g., ISO 16750-2 long-duration surges); requires ~2× PCB area and taller profile. | Choose SMCJ40CAHE3/52 for heavy-duty industrial power supplies; SMBG40CAHE3/52 balances performance and miniaturization for space-constrained nodes. |
Compared with SMBJ40CA-E3/52 and SMCJ40CAHE3/52, the SMBG40CAHE3/52 delivers identical clamping performance in the smallest footprint (SMBG), enabling high-density routing in ADAS camera modules and compact battery management systems where board real estate and Z-height are constrained.
Availability
SMBG40CAHE3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and consumer appliance motor drive circuits requiring stable component supply, AEC-Q101 compliance, and repeatable surge immunity performance.
Supply support for SMBG40CAHE3/52 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 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 SMBG TransZORB® series is engineered for high-reliability transient suppression in automotive, industrial, and telecom infrastructure-designed to meet stringent AEC-Q101, IEC 61000-4-2/4-5, and UL 497B requirements.
FAQ
What is the breakdown voltage range of SMBG40CAHE3/52?
The SMBG40CAHE3/52 has a guaranteed bidirectional breakdown voltage (VBR) range of 44.4 V to 49.1 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This range ensures consistent clamping onset across temperature and production lots, and is validated in the official Vishay datasheet (Document Number: 88456, Rev. 09-Jan-2024). The SMBG40CAHE3/52 maintains this specification in both forward and reverse directions due to its symmetrical structure.
Is SMBG40CAHE3/52 suitable for automotive applications?
Yes, SMBG40CAHE3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS subsystems. Its –55 °C to +150 °C operating junction temperature range, MSL Level 1 reflow compatibility, and validation against HTGB/HTRB stress tests confirm suitability. The SMBG40CAHE3/52 also meets UL 497B for protector classification and carries Vishay's QVGQ2 recognition, making it appropriate for safety-critical vehicle networks.
What is the clamping voltage of SMBG40CAHE3/52 at its rated surge current?
The SMBG40CAHE3/52 clamps to a maximum of 64.5 V at its peak pulse current (IPPM) of 9.3 A, defined by the 10/1000 µs waveform. This value is measured under standardized test conditions (mounted on 5.0 mm × 5.0 mm copper pads) and reflects actual worst-case voltage seen by protected circuitry during surge events. The clamping ratio (VC/VBR) is approximately 1.38, indicating efficient energy diversion without excessive overshoot.
Does SMBG40CAHE3/52 have polarity markings?
No, SMBG40CAHE3/52 does not have polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMBG40A), the CA suffix indicates symmetrical avalanche behavior in both directions, eliminating the need for cathode band identification. This simplifies layout and prevents misorientation during automated placement-critical for high-volume automotive PCB assembly where the SMBG40CAHE3/52 is commonly deployed.
What is the thermal resistance of SMBG40CAHE3/52?
The SMBG40CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, and a junction-to-lead resistance (RθJL) of 20 °C/W. These values are specified in the Vishay datasheet (88456) and define thermal derating behavior above 25 °C ambient. Designers must apply the derating curve (Fig. 2) to ensure safe operation under repetitive surge conditions.
SMBG40CAHE3/52 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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- 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)
SMBG40CAHE3/52 FAQ
1.How can I place an order for SMBG40CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG40CAHE3/52 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 SMBG40CAHE3/52 reliable?
The price and inventory of SMBG40CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG40CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG40CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG40CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG40CAHE3/52?
SMBG40CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG40CAHE3/52 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 SMBG40CAHE3/52?
For technical support, including SMBG40CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG40CAHE3/52 requirements.
6.How does Aetrix verify that SMBG40CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG40CAHE3/52 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 SMBG40CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG40CAHE3/52?
All SMBG40CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG40CAHE3/52, 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 SMBG40CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBG40CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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