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Vishay General Semiconductor - Diodes Division SMBG45AHE3/52
- Part No.:
- SMBG45AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG45AHE3/52.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,914
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Product details
Overview
SMBG45AHE3/52 from Vishay General Semiconductor is a unidirectional 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 power line and sensor interface protection.
For engineers reviewing the SMBG45AHE3/52 datasheet, SMBG45AHE3/52 pinout, SMBG45AHE3/52 application, or SMBG45AHE3/52 equivalent, key selection criteria include clamping performance under 8.3 ms surge, AEC-Q101 qualification for automotive reliability, RoHS compliance with matte tin terminations, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging a glass-passivated silicon junction to deliver fast response (<1 ns) and low incremental surge resistance. Its design targets transient suppression from inductive load switching and ESD events in 12 V/24 V automotive systems, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W enabling stable operation up to TJ = +150 °C.
The SMBG45AHE3/52 is rated for 100 A non-repetitive forward surge current (IFSM) per 8.3 ms half-sine wave and exhibits ≤1.0 μA reverse leakage at VWM, ensuring minimal standby power loss in always-on circuits such as CAN bus nodes or battery monitoring ICs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage trip threshold. |
| VBR (min/max) | 50.0 V / 55.3 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 72.7 V at 8.3 A - Clamping voltage limits downstream component stress during 10/1000 μs surge events. |
| PPPM | 600 W - Peak pulse power handling capability defines survivability against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| IFSM | 100 A - Surge current rating supports protection of 12 V power rails subjected to motor or relay coil flyback energy. |
| TJ max | +150 °C - Junction temperature limit enables use in under-hood automotive environments with high ambient thermal loads. |
| Package | SMBG (DO-215AA) - Surface-mount outline with 0.235" × 0.255" footprint, optimized for high-density PCB layouts and reflow compatibility. |
Pinout & Package
SMBG45AHE3/52 uses the SMBG (DO-215AA) surface-mount package: low-profile, gull-wing leads, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102, with cathode band marking on the anode side for polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to protected circuit ground or low-side return path; enables clamping when cathode is at higher potential. |
| Cathode | Current exit point during forward conduction; marked with band | Connected to supply rail or signal line being protected; conducts surge current to ground during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and ADAS sensors. |
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against ISO 7637-2 Pulse 5a (load dump) without external series impedance. |
| Glass passivated junction | Provides stable VBR tolerance and long-term parameter stability under thermal and humidity stress. |
| MSL Level 1 (260 °C peak) | Allows standard lead-free reflow without moisture sensitivity concerns - eliminates bake requirements prior to assembly. |
| RoHS compliant & halogen-free option available | Meets global environmental regulations while maintaining electrical performance; HE3 suffix denotes AEC-Q101 + RoHS compliance. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and input filter capacitor. Use Value: Limits voltage to ≤72.7 V during 100 V/400 ms load dump, preventing damage to LDOs and microcontrollers. | Use Scenario: Shielding analog output lines of pressure or temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across differential signal pair or single-ended output to ground. Use Value: Sub-1 ns response clamps ±8 kV contact ESD (IEC 61000-4-2) without distorting 0–5 V sensor signals. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered equipment front-end DC-DC converters from induced surges on 48 V input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of input EMI filter and buck controller. Use Value: Absorbs 600 W surge energy from lightning-induced coupling, maintaining converter uptime during field deployment. | Use Scenario: Suppressing flyback voltage spikes from brushed DC motors in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: Freewheeling TVS mounted across motor terminals to divert inductive kickback. Use Value: Withstands 100 A 8.3 ms surge, eliminating arcing and contact wear in mechanical relays driving motor loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG45AHM3/52 | Identical electrical specs; halogen-free molding compound and terminations. | Required where halogen-free compliance is mandated by OEM or regional environmental policy. | Select SMBG45AHM3/52 when RoHS + halogen-free certification is contractually required. |
| SMAJ45A-E3/52 | Same VWM/VC, but SMA package (DO-214AC); lower PPPM = 400 W; RθJA = 130 °C/W. | Lower power handling and thermal performance limit use to non-automotive or lower-energy transients. | Choose SMAJ45A-E3/52 only if board space constraints prohibit SMBG footprint and surge energy is <400 W. |
Compared with SMBG45AHE3/52, SMBG45AHM3/52 offers identical protection performance with halogen-free materials, while SMAJ45A-E3/52 trades package size for reduced surge capacity and thermal margin - making SMBG45AHE3/52 the optimal choice for AEC-Q101-compliant, high-energy automotive and industrial applications.
Availability
SMBG45AHE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply, full traceability, and lifecycle continuity support.
Supply support for SMBG45AHE3/52 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 automotive qualification.
The SMBG series is engineered for high-power transient suppression in harsh environments, targeting AEC-Q101-compliant automotive, industrial automation, and infrastructure applications where robustness and repeatable clamping are critical.
FAQ
What is the maximum clamping voltage of SMBG45AHE3/52 and under what test condition?
The SMBG45AHE3/52 has a maximum clamping voltage (VC) of 72.7 V, measured at a peak pulse current (IPPM) of 8.3 A using the standardized 10/1000 μs double-exponential waveform. This value is guaranteed per Vishay's datasheet revision 09-Jan-2024 and reflects worst-case clamping performance during surge events, directly limiting voltage stress on downstream components in the SMBG45AHE3/52-protected circuit.
Is SMBG45AHE3/52 qualified for automotive applications?
Yes, SMBG45AHE3/52 is AEC-Q101 qualified, as confirmed by Vishay's documentation and indicated by the "HE3" suffix. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, validating its suitability for under-hood and chassis-mounted automotive modules. The SMBG45AHE3/52 meets the reliability requirements for engine control, body electronics, and ADAS subsystems.
What does the "HE3" suffix mean in SMBG45AHE3/52?
The "HE3" suffix in SMBG45AHE3/52 denotes RoHS-compliant construction with AEC-Q101 qualification and standard matte tin plating. It distinguishes this variant from base "E3" (RoHS, industrial grade) and "HM3" (halogen-free + AEC-Q101) versions. The SMBG45AHE3/52 therefore combines automotive reliability, environmental compliance, and surface-mount process compatibility in a single part number.
Can SMBG45AHE3/52 be used in bidirectional protection circuits?
No, SMBG45AHE3/52 is a unidirectional TVS diode, as indicated by the "A" (not "CA") suffix and presence of cathode band marking. For bidirectional protection, Vishay specifies parts with "CA" suffix (e.g., SMBG45CA). Using SMBG45AHE3/52 in AC or symmetrical transient scenarios would result in forward conduction during negative excursions, potentially damaging the device or failing to protect the circuit.
What is the thermal resistance and maximum junction temperature of SMBG45AHE3/52?
SMBG45AHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured on 0.2" × 0.2" copper pads. Its maximum operating junction temperature is +150 °C, enabling reliable operation in high-ambient environments such as automotive engine compartments or industrial motor drives where the SMBG45AHE3/52 is commonly deployed.
SMBG45AHE3/52 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBG45AHE3/52 FAQ
1.How can I place an order for SMBG45AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG45AHE3/52 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 SMBG45AHE3/52 reliable?
The price and inventory of SMBG45AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG45AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG45AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG45AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG45AHE3/52?
SMBG45AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG45AHE3/52 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 SMBG45AHE3/52?
For technical support, including SMBG45AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG45AHE3/52 requirements.
6.How does Aetrix verify that SMBG45AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG45AHE3/52 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 SMBG45AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG45AHE3/52?
All SMBG45AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG45AHE3/52, 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 SMBG45AHE3/52 part is unused and in its original packaging.
Return procedure for SMBG45AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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