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Vishay General Semiconductor - Diodes Division SMBG43C-E3/5B
- Part No.:
- SMBG43C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG43C-E3/5B.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,152
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Product details
Overview
SMBG43C-E3/5B from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for clamping voltage transients on signal or power lines. It features 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤69.4 V at 8.6 A peak surge current - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMBG43C-E3/5B datasheet, SMBG43C-E3/5B pinout, SMBG43C-E3/5B application, or SMBG43C-E3/5B equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, RoHS-compliant matte tin terminations, and MSL Level 1 moisture sensitivity rating.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche behavior in both polarities, enabling suppression of positive and negative transients without polarity dependency. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports effective energy diversion during ESD or load-switching events.
The SMBG43C-E3/5B is rated for 600 W peak pulse power under standardized 10/1000 µs waveform conditions, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). It meets UL 497B recognition and is qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - guaranteed avalanche onset range for reliable bi-directional triggering |
| VC @ IPPM | ≤69.4 V at 8.6 A - clamped voltage during full-rated 600 W transient, defining system-level overvoltage margin |
| PPPM | 600 W - peak pulse power handling per 10/1000 µs waveform, defining transient energy absorption capacity |
| IPPM | 8.6 A - maximum non-repetitive peak surge current supported at rated clamping voltage |
| TJ max | +150 °C - maximum junction temperature, enabling operation in under-hood automotive environments |
| Leakage @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves signal integrity in high-impedance sensor circuits |
Pinout & Package
Package: DO-215AA (SMBG), surface-mount gull-wing lead frame with matte tin-plated terminals; no polarity marking for bi-directional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No functional distinction between terminals; either terminal serves as input/output for transient suppression |
| Lead 1 / Lead 2 | Current path for surge conduction | Both leads conduct equally during positive or negative transients; requires symmetric PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow processes without pre-baking |
| Glass-passivated junction | Ensures long-term stability of VBR and low parameter drift across temperature and life cycles |
| 600 W 10/1000 µs rating | Supports robust protection against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surges |
| UL 497B recognized | Meets safety requirements for telecom and industrial signal line protectors |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor lines (e.g., pressure, temperature) from load-dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed directly at connector entry point to limit transient amplitude before reaching MCU or signal conditioner. Use Value: Maintains signal fidelity below 69.4 V clamping threshold while surviving repetitive 600 W pulses - critical for AEC-Q100 Grade 2 compliance. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary transient suppressor on backplane or terminal block interface, shunting surge energy away from optocoupler inputs. Use Value: Enables >100,000 surge cycles at rated conditions due to low thermal resistance (20 °C/W junction-to-lead) and stable VBR. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base stations or network equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: First-stage protector on differential pair, working in coordination with GDT or polymer PTC for multi-stage defense. Use Value: Low capacitance (typ. <300 pF at 0 V) avoids signal distortion at up to 10 Mbps data rates. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines or HVAC blowers connected to microcontroller GPIOs. IC Role / Device Role / Timing Role: Localized clamp across motor driver outputs or feedback sensing nodes to prevent MCU reset or ADC corruption. Use Value: Withstands 8.3 ms half-sine surges up to 100 A (IFSM) - exceeds typical appliance motor turn-off energy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA-E3/5B | Same VWM/VBR range but lower PPPM (400 W vs. 600 W); smaller die size; higher clamping ratio (VC/VBR ≈ 1.45 vs. 1.37) | Limited to lower-energy transients (e.g., ESD-only); not recommended for ISO 7637-2 Pulse 5a load dump | Select SMBG43C-E3/5B when 600 W surge handling and AEC-Q101 qualification are mandatory. |
| 1.5KE43CA | Through-hole TO-218 package; same VWM/VBR; 1500 W PPPM but larger footprint and incompatible with SMT assembly | Used in legacy power supply designs or where manual repairability is prioritized over board density | Choose SMBG43C-E3/5B for automated SMT production, space-constrained layouts, and automotive qualification. |
Compared with SMBJ43CA-E3/5B and 1.5KE43CA, the SMBG43C-E3/5B uniquely combines 600 W surge rating, AEC-Q101 qualification, DO-215AA SMT compatibility, and UL 497B recognition - making it optimal for next-generation automotive and industrial edge electronics requiring validated reliability and compact form factor.
Availability
SMBG43C-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, AEC-Q101 compliance, and RoHS-conformant manufacturing.
Supply support for SMBG43C-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBG series was engineered for high-energy transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial, and telecom systems demanding AEC-Q101 validation and UL safety recognition.
FAQ
What does the "C" suffix in SMBG43C-E3/5B indicate?
The "C" suffix denotes bi-directional configuration - meaning the SMBG43C-E3/5B provides symmetrical clamping for both positive and negative transients without polarity dependence. This distinguishes it from uni-directional variants like SMBG43A-E3/5B, which require correct cathode orientation and only suppress one polarity.
Is SMBG43C-E3/5B suitable for automotive applications?
Yes - the SMBG43C-E3/5B is explicitly AEC-Q101 qualified and UL 497B recognized, making it suitable for automotive use cases including engine control units, body electronics, and ADAS sensor interfaces. Its 150 °C max junction temperature and MSL Level 1 rating further support under-hood deployment.
What is the clamping voltage of SMBG43C-E3/5B at its rated surge current?
The SMBG43C-E3/5B clamps to a maximum of 69.4 V at its peak pulse current (IPPM) of 8.6 A under 10/1000 µs waveform conditions. This value defines the upper voltage limit imposed on protected circuitry during a full-rated transient event.
How does SMBG43C-E3/5B differ from SMBJ43CA-E3/5B?
The SMBG43C-E3/5B delivers 600 W peak pulse power versus 400 W for SMBJ43CA-E3/5B, has lower clamping voltage (69.4 V vs. ~73.5 V), and is AEC-Q101 qualified - whereas SMBJ43CA-E3/5B is commercial-grade. Both share DO-215AA packaging and bi-directional functionality.
Does SMBG43C-E3/5B require polarity-aware PCB layout?
No - because SMBG43C-E3/5B is a bi-directional TVS diode, its terminals are functionally identical; there is no anode/cathode distinction. The device lacks polarity marking, and PCB layout need not observe orientation - simplifying placement and reducing assembly errors.
SMBG43C-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
SMBG43C-E3/5B FAQ
1.How can I place an order for SMBG43C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG43C-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 SMBG43C-E3/5B reliable?
The price and inventory of SMBG43C-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 SMBG43C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG43C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG43C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG43C-E3/5B?
SMBG43C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG43C-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 SMBG43C-E3/5B?
For technical support, including SMBG43C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG43C-E3/5B requirements.
6.How does Aetrix verify that SMBG43C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG43C-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 SMBG43C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG43C-E3/5B?
All SMBG43C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG43C-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 SMBG43C-E3/5B part is unused and in its original packaging.
Return procedure for SMBG43C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG43C-E3/5B Tags
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