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Vishay General Semiconductor - Diodes Division SMBG45CAHE3/52
- Part No.:
- SMBG45CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG45CAHE3/52.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,451
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Product details
Overview
SMBG45CAHE3/52 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 a 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR) at 1 mA, 72.7 V maximum clamping voltage (VC) at 8.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SMBG45CAHE3/52 datasheet, SMBG45CAHE3/52 pinout, SMBG45CAHE3/52 application, or SMBG45CAHE3/52 equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification for automotive use, low incremental surge resistance, and compatibility with automated SMT placement on standard 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding VWM, it avalanches symmetrically in both directions to clamp voltage at ≤72.7 V while diverting up to 8.3 A (10/1000 μs). Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), with thermal resistance RθJA = 100 °C/W enabling reliable operation up to +150 °C junction temperature.
Designed for unclamped inductive switching events (e.g., relay coils, solenoids) and lightning-induced surges, SMBG45CAHE3/52 meets UL 497B recognition (QVGQ2) and JESD201 Class 2 whisker resistance. The HE3 suffix confirms AEC-Q101 qualification and RoHS compliance - critical for automotive ECUs and ADAS sensor modules requiring long-term reliability under thermal cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 36 V nominal automotive systems. |
| VBR (min/max) | 50.0 V / 55.3 V at 1 mA - Confirmed bidirectional breakdown range; ensures symmetrical clamping behavior across polarity. |
| VC @ IPPM | 72.7 V at 8.3 A - Clamping voltage under 10/1000 μs surge; limits protected circuit stress below IC absolute maximum ratings. |
| PPPM | 600 W - Peak pulse power handling capability; supports repetitive 0.01% duty cycle surges without degradation. |
| Junction Temp | -55 °C to +150 °C - Wide operating range enables deployment in engine bay and under-hood automotive environments. |
| Package | SMBG (DO-215AA) - Low-profile surface-mount outline with 0.255" × 0.155" footprint; optimized for high-density PCB layouts. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
Pinout & Package
SMBG45CAHE3/52 uses the SMBG (DO-215AA) package: a bidirectional surface-mount device with no polarity marking; both terminals are electrically symmetrical and interchangeable. The case is molded with UL 94 V-0 rated compound, matte tin-plated leads compliant with J-STD-002 solderability and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 2; forms symmetrical clamping path - no cathode band marking required. |
| Terminal 2 | Anode/Cathode (bidirectional) | Interchangeable with Terminal 1; enables layout flexibility in differential or single-ended signal line protection. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both polarities - eliminates need for polarity-aware routing in AC-coupled or floating signal paths. |
| 600 W peak pulse power | Handles high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure when mounted on 5.0 mm × 5.0 mm copper pads. |
| AEC-Q101 qualification | Validated for automotive applications including powertrain, body control, and ADAS sensors - supports PPAP documentation. |
| Low profile SMBG package | Height ≤0.030" (0.76 mm) - enables use in space-constrained modules such as radar front-ends and camera ECU housings. |
| UL 497B recognition | QVGQ2 file E136766 - satisfies safety agency requirements for telecom and industrial interface protection circuits. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/FlexRay signal lines and analog sensor inputs (e.g., pressure, temperature) in engine control units against load dump and inductive kickback. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point to clamp surges before reaching PHY or ADC front-end. Use Value: Limits transient voltage to ≤72.7 V, preventing latch-up or gate oxide damage in 5 V or 3.3 V interface ICs while maintaining signal integrity. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to field wiring transients and relay contact bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact inputs, working in concert with series current-limiting resistors and optocouplers. Use Value: Withstands repeated 600 W surges per IEC 61000-4-5 Level 3 (2 kV), extending field service life and reducing spurious fault trips. |
| Telecom Line Interface | Consumer Appliance Motor Control |
|
Use Scenario: Protecting RS-485 transceivers and Ethernet PHYs in base station backhaul equipment from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional TVS on differential pair (A/B lines), placed before common-mode choke to suppress asymmetrical transients. Use Value: Symmetrical clamping ensures balanced suppression without skewing differential signaling; CJ < 100 pF at 0 V minimizes data rate impact. |
Use Scenario: Shielding microcontroller GPIOs and gate drivers in washing machine motor inverters from commutation spikes generated by BLDC motors. IC Role / Device Role / Timing Role: Secondary protection stage after bulk MOVs, absorbing residual high-frequency energy that bypasses primary filtering. Use Value: Fast <1 ns response captures edge-of-spike energy missed by slower protectors, reducing MCU reset events and EEPROM corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45CA | Same VWM/VBR/VC specs but lower PPPM = 600 W (same rating), different package (SMB vs. SMBG); RθJA = 110 °C/W vs. 100 °C/W. | Not AEC-Q101 qualified; intended for industrial/commercial use only. | Select SMBJ45CA only if automotive qualification is unnecessary and existing SMB footprint is fixed. |
| SMAJ45CA | Lower PPPM = 400 W; VC = 73.0 V at 5.5 A; smaller SMA package (DO-214AC) with higher RθJA = 140 °C/W. | Limited surge endurance; unsuitable for repetitive automotive transients or high-temperature enclosures. | Use SMAJ45CA only for cost-sensitive consumer applications with infrequent, low-energy transients. |
Compared with SMBJ45CA and SMAJ45CA, SMBG45CAHE3/52 delivers superior thermal performance (RθJA = 100 °C/W), AEC-Q101 validation, and verified UL 497B recognition - making it the only choice for production automotive and safety-critical industrial designs requiring guaranteed surge immunity.
Availability
SMBG45CAHE3/52 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom interface hardening requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBG45CAHE3/52 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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBG TransZORB® series targets high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for consistent clamping, low leakage, and robust surge endurance under harsh thermal and electrical conditions.
FAQ
What is the clamping voltage of SMBG45CAHE3/52 under a 10/1000 μs surge?
The SMBG45CAHE3/52 exhibits a maximum clamping voltage (VC) of 72.7 V at 8.3 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured with the device mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per JEDEC standards, ensuring repeatable performance in production PCB layouts.
Is SMBG45CAHE3/52 suitable for automotive applications?
Yes, SMBG45CAHE3/52 is AEC-Q101 qualified and carries the HE3 suffix denoting automotive-grade qualification, RoHS compliance, and enhanced reliability testing. It is explicitly validated for use in engine control units, ADAS sensor modules, and body electronics where sustained operation from -55 °C to +150 °C and immunity to load dump transients are required.
Does SMBG45CAHE3/52 have polarity markings?
No, SMBG45CAHE3/52 is a bidirectional TVS diode and carries no cathode band or polarity marking. Both terminals are functionally identical, enabling symmetric placement on differential signal lines or unmarked PCB footprints - a key advantage over unidirectional variants like SMBG45AHE3/52.
What is the thermal resistance of SMBG45CAHE3/52?
The SMBG45CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the recommended 0.2" × 0.2" copper pad layout. Its junction-to-lead resistance (RθJL) is 20 °C/W, supporting effective heat conduction into PCB copper planes in thermally demanding automotive and industrial environments.
How does SMBG45CAHE3/52 differ from SMBJ45CA?
SMBG45CAHE3/52 uses the SMBG (DO-215AA) package with tighter thermal resistance (RθJA = 100 °C/W vs. 110 °C/W), AEC-Q101 qualification, and UL 497B recognition - whereas SMBJ45CA is commercial-grade, lacks automotive qualification, and uses the SMB (DO-214AA) package. Both share identical electrical specs but differ in reliability assurance and thermal performance.
SMBG45CAHE3/52 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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- 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)
SMBG45CAHE3/52 FAQ
1.How can I place an order for SMBG45CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG45CAHE3/52 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 SMBG45CAHE3/52 reliable?
The price and inventory of SMBG45CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG45CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG45CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG45CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG45CAHE3/52?
SMBG45CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG45CAHE3/52 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 SMBG45CAHE3/52?
For technical support, including SMBG45CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG45CAHE3/52 requirements.
6.How does Aetrix verify that SMBG45CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG45CAHE3/52 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 SMBG45CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG45CAHE3/52?
All SMBG45CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG45CAHE3/52, 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 SMBG45CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBG45CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG45CAHE3/52 Tags
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