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Vishay General Semiconductor - Diodes Division SMBG45A-E3/5B
- Part No.:
- SMBG45A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG45A-E3/5B.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,582
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Product details
Overview
SMBG45A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMBG (DO-215AA) package, with 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 per 10/1000 μs waveform-designed for protecting MOSFETs and signal lines in automotive powertrain control modules.
For engineers reviewing the SMBG45A-E3/5B datasheet, SMBG45A-E3/5B pinout, SMBG45A-E3/5B application, or SMBG45A-E3/5B equivalent, key selection criteria include clamping performance under 8.3 A surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification for automotive use, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a shunt-clamping protector: during transient overvoltage events exceeding VWM = 45 V, it avalanches at VBR = 50.0–55.3 V and limits downstream voltage to ≤72.7 V at IPPM = 8.3 A. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 μA at VWM).
Thermal design relies on RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling operation from −55 °C to +150 °C junction temperature. The device meets MSL Level 1 (260 °C peak reflow) and is qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working limit. |
| VBR @ IT = 1 mA | 50.0–55.3 V - Breakdown threshold range; ensures reliable avalanche initiation without premature conduction. |
| VC @ IPPM = 8.3 A | 72.7 V - Clamped voltage during 10/1000 μs surge; determines maximum stress on protected IC or MOSFET. |
| PPPM | 600 W - Peak pulse power handling capability; supports repetitive transients at 0.01 % duty cycle. |
| IFSM | 100 A - Non-repetitive 8.3 ms half-sine forward surge rating; validates robustness against load dump events. |
| Junction Temp Range | −55 °C to +150 °C - Enables deployment in engine control units and battery management systems. |
| Leakage @ VWM | ≤1.0 μA - Minimal standby power loss and signal integrity impact in high-impedance sensor interfaces. |
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; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during clamping | Connected to protected line (e.g., 45 V rail); conducts surge current toward ground when VANODE − VCATHODE > VBR. |
| Cathode | Current exit terminal during clamping | Connected to system ground; cathode band marking enables correct orientation during automated placement and visual inspection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood applications including powertrain and body control modules. |
| 600 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b, and load dump surges without degradation. |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or special handling. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD or inductive switching spikes). |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting gate drivers and microcontrollers in 48 V mild-hybrid engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed across MOSFET gate-source or supply rail to clamp transients below IC absolute maximum ratings. Use Value: Limits clamped voltage to 72.7 V at 8.3 A, preventing latch-up or oxide damage in 80 V-rated gate drivers. | Use Scenario: Safeguarding encoder feedback lines and PWM input circuits in servo drives subject to inductive kickback from 3-phase motors. IC Role / Device Role / Timing Role: Unidirectional TVS connected between signal line and ground to suppress negative-going transients while preserving DC bias. Use Value: Sub-1 μA leakage at 45 V ensures minimal offset error in precision analog position sensing. |
| Telecom Power Interface | Automotive Body Electronics |
Use Scenario: Guarding 48 V PoE-powered base station front-end circuitry against lightning-induced surges on DC input lines. IC Role / Device Role / Timing Role: Primary-level TVS on main DC input rail upstream of DC/DC converters and protection ICs. Use Value: 600 W rating handles multiple 10/1000 μs surges per IEC 61000-4-5 Level 4 without derating. | Use Scenario: Securing LIN bus transceivers and LED driver ICs in door module ECUs subjected to battery reversal and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS on VCC rail with cathode tied to battery positive, anode to protected IC supply pin. Use Value: AEC-Q101 qualification and −55 °C to +150 °C operation ensure compliance with automotive environmental requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45A-E3/5B | Same VWM (45 V), but lower PPPM = 600 W and higher VC = 73.0 V at same IPPM; SMBJ package has larger footprint (DO-214AB vs. DO-215AA). | Less space-constrained designs where board area permits larger package; identical clamping performance within measurement tolerance. | Select SMBJ45A-E3/5B only if existing layout accommodates DO-214AB and no AEC-Q101 requirement exists. |
| SMCJ45A-E3/5B | Same VWM and VBR, but PPPM = 1500 W and VC = 73.0 V at 20.6 A; SMC package (DO-214AB) is larger and rated for higher surge energy. | High-energy surge environments such as 24/48 V battery disconnect circuits or heavy-duty industrial PLC inputs. | Choose SMCJ45A-E3/5B when surge current exceeds 8.3 A or when system-level testing requires >600 W margin. |
Compared with SMBJ45A-E3/5B and SMCJ45A-E3/5B, SMBG45A-E3/5B delivers identical 45 V standoff and AEC-Q101 qualification in the smallest footprint (DO-215AA), making it optimal for space-limited automotive modules where 600 W surge immunity suffices.
Availability
SMBG45A-E3/5B is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive protection, and telecom power interface applications requiring stable component supply, AEC-Q101 compliance, and surface-mount manufacturability.
Supply support for SMBG45A-E3/5B 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 supplier of discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, automotive qualification, and industrial-grade performance.
The SMBG Transient Voltage Suppressor family targets compact, high-reliability overvoltage protection in automotive, industrial, and telecom systems where AEC-Q101 compliance and low-profile packaging are mandatory.
FAQ
What is the clamping voltage of SMBG45A-E3/5B at its rated peak pulse current?
The SMBG45A-E3/5B exhibits a maximum clamping voltage (VC) of 72.7 V when subjected to its rated peak pulse current of 8.3 A using a 10/1000 μs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBG45A-E3/5B maintains this clamping performance across its full operating temperature range.
Is SMBG45A-E3/5B qualified for automotive applications?
Yes, SMBG45A-E3/5B is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including engine control units, body control modules, and ADAS power supplies. The qualification covers stress tests for temperature cycling, humidity, mechanical shock, and surge robustness. The SMBG45A-E3/5B part number suffix "HE3" denotes AEC-Q101 qualification, and the E3/5B variant retains that qualification per Vishay's ordering documentation.
What does the "E3/5B" suffix indicate for SMBG45A-E3/5B?
The "E3" suffix indicates RoHS-compliant, industrial-grade construction with matte tin-plated leads, while "5B" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3200 units. This format supports high-volume automated SMT assembly. The SMBG45A-E3/5B is not halogen-free (that would require "M3"); it meets JESD 201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow standards.
How does SMBG45A-E3/5B differ from bidirectional TVS diodes like SMBG45CA?
SMBG45A-E3/5B is unidirectional and features a cathode band for polarity identification, conducting only during reverse-biased overvoltage events. In contrast, SMBG45CA is bidirectional with symmetric clamping in both directions and no polarity marking. The SMBG45A-E3/5B offers lower leakage (<1.0 μA at 45 V) than SMBG45CA (≤2.0 μA), making it preferable for DC-coupled rails where reverse leakage must be minimized.
What PCB pad layout is recommended for optimal thermal and surge performance of SMBG45A-E3/5B?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad for each terminal to achieve rated 600 W peak pulse power and thermal resistance (RθJA = 100 °C/W). The SMBG45A-E3/5B datasheet Figure 5 shows the exact mounting pad dimensions for DO-215AA. Using smaller pads reduces surge capability and increases junction temperature-potentially derating IPPM and shortening lifetime under repetitive transients.
SMBG45A-E3/5B 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-E3/5B FAQ
1.How can I place an order for SMBG45A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG45A-E3/5B 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-E3/5B reliable?
The price and inventory of SMBG45A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG45A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG45A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG45A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG45A-E3/5B?
SMBG45A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG45A-E3/5B 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-E3/5B?
For technical support, including SMBG45A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG45A-E3/5B requirements.
6.How does Aetrix verify that SMBG45A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG45A-E3/5B 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-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG45A-E3/5B?
All SMBG45A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG45A-E3/5B, 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-E3/5B part is unused and in its original packaging.
Return procedure for SMBG45A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG45A-E3/5B Tags
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