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Vishay General Semiconductor - Diodes Division SMBG45-E3/5B
- Part No.:
- SMBG45-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG45-E3/5B.pdf
- Description:
- TVS DIODE 45VWM 80.3VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,691
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Product details
Overview
SMBG45-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for clamping inductive switching transients and ESD events on power and signal lines. It features 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.
For engineers reviewing the SMBG45-E3/5B datasheet, SMBG45-E3/5B pinout, SMBG45-E3/5B application, or SMBG45-E3/5B equivalent, this device is selected for robust overvoltage protection in automotive power rails, industrial sensor interfaces, DC-DC converter input stages, and USB/RS-485 line protection where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are required.
Technical Context
The SMBG45-E3/5B operates as a silicon avalanche diode with glass-passivated junction, delivering unidirectional clamping action triggered when reverse voltage exceeds its VBR threshold. Its thermal resistance (RθJA = 100 °C/W) and junction-to-lead resistance (RθJL = 20 °C/W) support reliable operation up to 150 °C junction temperature under repetitive surge conditions.
It meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), is RoHS-compliant (E3 suffix), and qualified to AEC-Q101 for automotive use. The device exhibits <1.0 µA reverse leakage at 45 V and clamps to ≤72.7 V at 8.3 A IPPM - enabling effective protection of downstream MOSFETs, ICs, and communication transceivers without excessive voltage overshoot.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 45 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system rail voltage. |
| VBR (Breakdown Voltage) | 50.0–55.3 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 72.7 V at 8.3 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs surge; defines worst-case stress level. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability under standardized 10/1000 µs waveform; enables single-event surge handling. |
| ID (Reverse Leakage) | ≤1.0 µA at 45 V - Minimal standby power loss and negligible loading on high-impedance signal paths. |
| TJ max | 150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive and industrial enclosures. |
| Package | DO-215AA (SMBG) - Surface-mount outline with gull-wing leads; compatible with automated placement and reflow soldering. |
Pinout & Package
DO-215AA (SMBG) package: surface-mount gull-wing leaded case with cathode band marking on one end. Matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability requirements; E3 suffix complies with JESD 201 Class 1A whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); conducts during forward surge or bias conditions. |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 48 V rail or CAN_H); avalanches into conduction when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables suppression of high-energy load-dump and inductive kick events common in 24–48 V automotive systems. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime; resists moisture ingress and contamination in harsh environments. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without popcorn or delamination risk during PCB assembly. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected ICs - critical for safeguarding 5 V or 3.3 V logic interfacing with 45 V rails. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input, clamping surges within nanoseconds. Use Value: Limits peak voltage to ≤72.7 V, preventing damage to buck controller ICs rated for 80 V absolute maximum. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure or temperature transducers) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS mounted at connector entry point, shunting transients before signal conditioning op-amps. Use Value: Maintains signal integrity with minimal DC loading while responding faster than RC filters to sub-ns ESD pulses. |
| DC-DC Converter Input Stage | RS-485/Can Bus Line Protection |
Use Scenario: Safeguarding isolated DC-DC modules in telecom power supplies subjected to lightning-induced surges on primary-side inputs. IC Role / Device Role / Timing Role: Primary-side TVS absorbing 600 W surges before input capacitors and MOSFET switches. Use Value: Prevents catastrophic failure of primary-side FETs by clamping transients below their 100 V VDS rating. |
Use Scenario: Protecting RS-485 transceivers connected to long field wiring exposed to induced surges and ground potential differences. IC Role / Device Role / Timing Role: Unidirectional TVS on each data line (A/B), referenced to local ground, with low capacitance (<100 pF). Use Value: Clamps common-mode surges to ≤72.7 V without distorting differential signaling due to matched clamping characteristics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45A-E3/5B | Same VWM (45 V), identical DO-214AB (SMB) package but slightly higher VC (73.0 V vs. 72.7 V); 10% lower thermal resistance (RθJA = 90 °C/W). | Preferred for space-constrained layouts requiring tighter thermal management; not AEC-Q101 qualified. | Select SMBJ45A-E3/5B only if AEC-Q101 compliance is unnecessary and board real estate favors SMB over SMBG footprint. |
| SMBG45HE3/5B | Identical electrical specs and DO-215AA package, but HE3 suffix denotes AEC-Q101 qualification and enhanced whisker resistance (JESD 201 Class 2). | Required for automotive safety-critical modules (e.g., ADAS sensors) needing full automotive qualification traceability. | Choose SMBG45HE3/5B when full AEC-Q101 documentation, lot-level traceability, and extended whisker testing are mandated. |
Compared with SMBJ45A-E3/5B and SMBG45HE3/5B, the SMBG45-E3/5B provides certified AEC-Q101 performance in the larger DO-215AA package - offering superior surge energy handling margin and compatibility with high-reliability automotive harness interfaces where lead pitch and thermal mass matter.
Availability
SMBG45-E3/5B is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and DC-DC converter input stage surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMBG45-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 leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG series was engineered for high-energy transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, robust glass-passivated junctions, and optimized thermal design for surface-mount survivability.
FAQ
What is the clamping voltage of SMBG45-E3/5B at its rated peak pulse current?
The SMBG45-E3/5B has a maximum clamping voltage (VC) of 72.7 V at 8.3 A peak pulse current (IPPM) under the 10/1000 µs waveform condition. This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuits during surge events - critical for ensuring downstream components remain within their absolute maximum ratings.
Is SMBG45-E3/5B qualified for automotive applications?
Yes, SMBG45-E3/5B is AEC-Q101 qualified, as confirmed in Vishay's official datasheet (Document Number: 88456, Revision: 12-Nov-12). This qualification covers stress tests including temperature cycling, high-temperature operating life, and mechanical shock - making SMBG45-E3/5B suitable for engine control units, body electronics, and ADAS subsystems where automotive-grade reliability is mandatory.
What does the "E3/5B" suffix mean in SMBG45-E3/5B?
The "E3" suffix indicates RoHS-compliant, commercial-grade construction with JESD 201 Class 1A whisker resistance; "5B" specifies packaging in 13-inch diameter plastic tape and reel with 3200 units per reel. This differs from "52" (7-inch reel, 750 units) and "HE3" (AEC-Q101 qualified variant), confirming SMBG45-E3/5B is the standard automotive-capable version in high-volume reel format.
How does SMBG45-E3/5B differ from bi-directional TVS diodes like SMBG45CA?
SMBG45-E3/5B is unidirectional and features a cathode band for polarity-sensitive placement, whereas SMBG45CA is bi-directional with no marking and symmetrical clamping in both directions. The unidirectional SMBG45-E3/5B offers lower leakage (<1 µA vs. ≤2 µA for CA types) and is preferred for DC power line protection; SMBG45CA suits AC-coupled or floating signal lines like antenna feeds or audio paths.
What is the thermal resistance of SMBG45-E3/5B, and how does it affect layout design?
SMBG45-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W. These values require minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power dissipation - underscoring the need for adequate copper area and thermal vias in PCB layout to maintain TJ ≤ 150 °C during repetitive surge events.
SMBG45-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 80.3V
- Current - Peak Pulse (10/1000µs):
- 7.5A
- 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)
SMBG45-E3/5B FAQ
1.How can I place an order for SMBG45-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG45-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 SMBG45-E3/5B reliable?
The price and inventory of SMBG45-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 SMBG45-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG45-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG45-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG45-E3/5B?
SMBG45-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG45-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 SMBG45-E3/5B?
For technical support, including SMBG45-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG45-E3/5B requirements.
6.How does Aetrix verify that SMBG45-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG45-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 SMBG45-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG45-E3/5B?
All SMBG45-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG45-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 SMBG45-E3/5B part is unused and in its original packaging.
Return procedure for SMBG45-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG45-E3/5B Tags
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