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Vishay General Semiconductor - Diodes Division SMBG45A-E3/52
- Part No.:
- SMBG45A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG45A-E3/52.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,224
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Product details
Overview
SMBG45A-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, rated for 45 V stand-off voltage, 50.0–55.3 V breakdown at 1 mA, 72.7 V clamping voltage at 8.3 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform-designed to protect automotive-grade power rails and signal lines from ESD and load dump transients.
For engineers reviewing the SMBG45A-E3/52 datasheet, SMBG45A-E3/52 pinout, SMBG45A-E3/52 application, or SMBG45A-E3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device in series with sensitive downstream circuitry, activating when reverse voltage exceeds its breakdown threshold (VBR = 50.0–55.3 V), limiting transient energy via low dynamic impedance. Its glass-passivated junction ensures stable leakage (<1.0 μA at 45 V) and fast response time (<1 ns).
Designed for automotive electronics per AEC-Q101, it supports repetitive 0.01% duty cycle surges and withstands 100 A non-repetitive forward surge (8.3 ms half-sine), with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W-enabling reliable operation under high ambient temperatures up to +150 °C junction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 50.0 V / 55.3 V at 1.0 mA - Confirmed breakdown range ensuring predictable turn-on margin |
| VC @ IPPM | 72.7 V at 8.3 A - Clamped voltage during 10/1000 μs transient, defining protected circuit stress level |
| PPPM | 600 W - Peak pulse power handling capability under standardized surge waveform |
| IFSM | 100 A - Non-repetitive forward surge rating for load-dump immunity in 12 V automotive systems |
| TJ max | +150 °C - Maximum junction temperature enabling under-hood deployment without derating |
| Leakage @ VWM | ≤1.0 μA - Ultra-low reverse leakage preserving battery life in always-on circuits |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band marking; meets UL 94 V-0 flammability rating and MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-side return path in unidirectional protection configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail or CAN-H); band-marked end defines polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b and IEC 61000-4-5 surge events without degradation |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream ICs such as microcontrollers and transceivers |
| MSL Level 1 compliance | Enables standard SMT reflow without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5a) and alternator switching spikes. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power input and ground, activated within <1 ns upon overvoltage detection. Use Value: Limits voltage to ≤72.7 V during 8.3 A surge, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies and CAN transceivers. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules exposed to relay coil flyback and EMI. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 μA) TVS shunting transient energy from signal line to ground before reaching ADC front-end. Use Value: Maintains signal integrity with <1 pF junction capacitance at 0 V bias, avoiding bandwidth reduction in 10 kHz–1 MHz sensor signals. |
| Automotive Lighting Control | Telecom DC Power Input Protection |
Use Scenario: Shielding LED driver ICs in headlamp modules from inductive kickback during PWM dimming and relay-controlled on/off cycles. IC Role / Device Role / Timing Role: Fast-response TVS absorbing 600 W pulses while maintaining stable VWM = 45 V to avoid false triggering during normal 13.5 V nominal operation. Use Value: Enables robust design with 100 A IFSM rating, surviving repeated 8.3 ms surges without parameter drift or bond wire failure. | Use Scenario: Securing 48 V DC power inputs of telecom base station equipment against lightning-induced surges per IEC 61000-4-5 Level 4. IC Role / Device Role / Timing Role: Primary-stage TVS in cascade protection architecture, clamping incoming transients before secondary MOV or GDT stages. Use Value: Provides precise 45 V stand-off with ±5.3 V VBR tolerance, allowing tight coordination with downstream crowbar circuits and OVP ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45A-E3/52 | Same VWM (45 V), identical SMB (DO-214AA) package but 3.5 mm × 3.5 mm footprint vs. SMBG's 4.57 mm × 3.94 mm; 600 W rating retained | Smaller pad layout required; slightly higher RθJA (125 °C/W) limits high-power density layouts | Select SMBJ45A-E3/52 only if board space is constrained and thermal margin allows |
| SMCJ45A-E3/52 | Same electrical specs but larger SMC (DO-214AB) package (7.11 mm × 6.22 mm); 1500 W PPPM, not 600 W | Higher surge capacity suits harsher environments (e.g., commercial vehicle power systems), but requires larger PCB area | Choose SMCJ45A-E3/52 when system-level surge testing exceeds 600 W requirements or when legacy SMC footprint is fixed |
Compared with SMBJ45A-E3/52 and SMCJ45A-E3/52, SMBG45A-E3/52 delivers optimal balance of AEC-Q101 compliance, compact SMBG footprint, and validated 600 W performance-making it ideal for space-constrained automotive modules where thermal management and reliability are co-prioritized.
Availability
SMBG45A-E3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supply designs requiring stable component supply, RoHS-compliant packaging, and AEC-Q101 validation.
Supply support for SMBG45A-E3/52 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, automotive qualification, and high-volume manufacturability.
The SMBG series was developed specifically for AEC-Q101-compliant transient suppression in automotive power distribution and signal conditioning-prioritizing low clamping ratio, stable leakage, and robust thermal performance in under-hood environments.
FAQ
What is the maximum clamping voltage of SMBG45A-E3/52 under standard test conditions?
The SMBG45A-E3/52 has a maximum clamping voltage (VC) of 72.7 V at 8.3 A peak pulse current using the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events, ensuring compatibility with 75 V-rated downstream components.
Is SMBG45A-E3/52 qualified for automotive applications?
Yes, SMBG45A-E3/52 is AEC-Q101 qualified, as confirmed in the Vishay datasheet revision 09-Jan-2024. It meets rigorous stress tests for temperature cycling, humidity, mechanical shock, and surge endurance-making it suitable for use in engine control units, body control modules, and ADAS sensor interfaces where reliability is critical.
What does the "E3/52" suffix indicate in SMBG45A-E3/52?
The "E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads, while "/52" specifies packaging in 7" diameter plastic tape and reel with a base quantity of 750 units. This format ensures compatibility with standard SMT pick-and-place equipment and supports high-volume automated assembly.
How does SMBG45A-E3/52 differ from bidirectional variants like SMBG45CA?
SMBG45A-E3/52 is unidirectional with cathode marking and conducts only in forward bias, whereas SMBG45CA is bidirectional with no polarity marking and clamps in both directions. The unidirectional SMBG45A-E3/52 offers lower leakage (<1.0 μA) and is preferred for DC power rail protection, while SMBG45CA suits AC-coupled or differential signal lines.
What is the thermal resistance profile of SMBG45A-E3/52?
SMBG45A-E3/52 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" (5.0 mm × 5.0 mm) copper pads. These values enable effective heat dissipation in automotive and industrial PCB layouts without requiring additional heatsinking.
SMBG45A-E3/52 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG45A-E3/52 FAQ
1.How can I place an order for SMBG45A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG45A-E3/52 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 SMBG45A-E3/52 reliable?
The price and inventory of SMBG45A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG45A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG45A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG45A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG45A-E3/52?
SMBG45A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG45A-E3/52 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 SMBG45A-E3/52?
For technical support, including SMBG45A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG45A-E3/52 requirements.
6.How does Aetrix verify that SMBG45A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG45A-E3/52 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 SMBG45A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG45A-E3/52?
All SMBG45A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG45A-E3/52, 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 SMBG45A-E3/52 part is unused and in its original packaging.
Return procedure for SMBG45A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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