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Vishay General Semiconductor - Diodes Division SMCG43CAHE3/9AT
- Part No.:
- SMCG43CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG43CAHE3/9AT.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,915
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Product details
Overview
SMCG43CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V standoff voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), clamping voltage of 69.4 V at 21.6 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG43CAHE3/9AT datasheet, SMCG43CAHE3/9AT pinout, SMCG43CAHE3/9AT application, or SMCG43CAHE3/9AT equivalent, this device is selected for high-energy surge suppression in automotive sensor interfaces, industrial I/O lines, and telecom signal conditioning where bidirectional clamping, low clamping ratio, and MSL Level 1 solderability are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions per ANSI/IEEE C62.35. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 µA at VWM), while the DO-215AB package delivers low thermal resistance (RθJL = 15 °C/W) and supports automated SMT placement.
The device sustains non-repetitive 10/1000 µs surges up to 21.6 A (IPPM) with a clamping ratio (VC/VBR) of ~1.38, enabling effective protection of downstream MOSFETs and ICs against inductive switching transients and ESD events. It meets UL 497B recognition (QVGQ2) and is rated for operation from –55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 47.8 V / 52.8 V at 1 mA - Tight breakdown window ensures predictable turn-on and consistent protection threshold. |
| VC @ IPPM | 69.4 V at 21.6 A - Clamping voltage under full-rated surge; determines maximum stress imposed on downstream components. |
| PPPM | 1500 W (10/1000 µs) - Peak surge energy handling capacity; enables protection against severe lightning-induced or inductive kick transients. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max | +150 °C - Extended junction temperature rating supports under-hood automotive and high-ambient industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control, ADAS sensors, and body electronics per stress test requirements. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount gull-wing package with matte tin-plated leads, UL 94 V-0 molding compound, and MSL Level 1 rating (peak reflow 260 °C). No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A (bidirectional) | One side of symmetrical PN junction; connects to line under protection without polarity constraint. |
| Cathode | Terminal B (bidirectional) | Other side of symmetrical PN junction; completes bidirectional clamping path between protected line and reference (e.g., GND or VCC). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout in differential or AC-coupled signal paths. |
| Glass passivated junction | Enhanced long-term stability and reduced parameter drift under thermal cycling and humidity exposure. |
| Low incremental surge resistance | Enables tighter VC/VBR ratio (1.38) - reduces voltage overshoot during fast transients compared to higher-Rsurge TVS devices. |
| MSL Level 1 compliance | Supports standard SMT reflow without dry-pack or baking - simplifies manufacturing and reduces assembly cost. |
| UL 497B recognition (QVGQ2) | Validated for use in telecom and industrial protectors requiring third-party safety certification. |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt surge energy before reaching signal conditioning ICs. Use Value: With 69.4 V clamping at 21.6 A and AEC-Q101 qualification, SMCG43CAHE3/9AT limits transient stress below the 70 V absolute maximum rating of common automotive transceivers. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from relay coils, solenoids, and motor drives. IC Role / Device Role / Timing Role: Primary front-end protector on 24 V DC input channels, mounted adjacent to terminal block to intercept energy before optocoupler or MCU GPIO. Use Value: 1500 W PPPM and 43 V VWM align precisely with 24 V industrial control system surge immunity requirements (IEC 61000-4-5 Level 3), ensuring reliable operation without derating. |
| Telecom Line Interface Protection | Consumer Power Adapter ESD Guard |
|
Use Scenario: Shielding RS-485/RS-422 data lines in base station backhaul equipment from lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Paired bidirectional TVS across differential pair (A–B) and to ground, providing symmetrical clamping for balanced signaling. Use Value: Low 1.0 µA ID at VWM prevents signal attenuation on high-impedance bus lines, while 69.4 V VC ensures receiver ICs (e.g., THVD1550) remain within safe operating area. |
Use Scenario: Adding secondary-level surge protection on USB-C or barrel jack inputs of smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Secondary clamp after primary MOV/fuse, absorbing residual fast-rising ESD (IEC 61000-4-2 ±8 kV contact) and low-energy surges missed by bulk protection. Use Value: DO-215AB footprint allows compact placement near connectors; 1500 W rating handles repetitive low-energy events without degradation, extending product field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CA | Same VWM (43 V) and PPPM (400 W), but lower 400 W rating and SMA (DO-214AC) package - 30% smaller footprint, higher RθJA (150 °C/W). | Preferred for space-constrained consumer PCBs where 400 W surge margin suffices; not suitable for automotive under-hood due to lower power and no AEC-Q101. | Select SMAJ43CA only when board area is critical and surge threat level is limited to IEC 61000-4-5 Level 2. |
| SMCJ43CA | Same VWM (43 V) and higher PPPM (3000 W), but larger SMC (DO-214AB) package and higher RθJA (100 °C/W); AEC-Q101 qualified. | Used where higher surge margin is needed (e.g., EV charging port interfaces), but requires 40% more board area and thicker copper for thermal management. | Choose SMCJ43CA when protecting high-energy circuits like battery management inputs, accepting larger footprint for doubled PPPM headroom. |
Compared with SMAJ43CA and SMCJ43CA, SMCG43CAHE3/9AT delivers optimal balance: AEC-Q101 qualification and 1500 W PPPM in a mid-size DO-215AB package with superior thermal performance (RθJL = 15 °C/W), making it ideal for automotive and industrial applications demanding reliability, power, and manufacturability.
Availability
SMCG43CAHE3/9AT 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 1500 W transient immunity.
Supply support for SMCG43CAHE3/9AT 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, precision, and application-specific performance.
The SMCG series targets high-reliability transient suppression in automotive, industrial, and telecom systems, combining AEC-Q101 qualification, UL recognition, and optimized DO-215AB packaging for automated manufacturing.
FAQ
What is the clamping voltage of SMCG43CAHE3/9AT at its rated peak pulse current?
The SMCG43CAHE3/9AT has a maximum clamping voltage (VC) of 69.4 V at its rated peak pulse current (IPPM) of 21.6 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and reflects the actual voltage seen by protected circuitry during worst-case surge events, confirming its suitability for safeguarding 48 V nominal systems and automotive 36 V load-dump scenarios.
Is SMCG43CAHE3/9AT suitable for automotive applications?
Yes, SMCG43CAHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its –55 °C to +150 °C operating junction temperature range, UL 497B recognition, and DO-215AB package with MSL Level 1 compliance make it appropriate for engine control units, ADAS sensor interfaces, and body electronics where robust transient suppression is mandatory.
How does the bidirectional design of SMCG43CAHE3/9AT affect circuit layout?
The bidirectional design of SMCG43CAHE3/9AT eliminates polarity constraints - no cathode band marking is present, and the device functions identically regardless of orientation. This simplifies PCB layout for differential signals (e.g., RS-485), AC-coupled lines, or any application where voltage transients may occur with either polarity, reducing design risk and assembly errors.
What is the maximum reverse leakage current for SMCG43CAHE3/9AT at its standoff voltage?
At its 43 V standoff voltage (VWM), SMCG43CAHE3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes power loss in always-on monitoring circuits, supporting precision analog and low-power IoT applications.
Does SMCG43CAHE3/9AT require special PCB pad layout for thermal performance?
Yes - optimal thermal performance for SMCG43CAHE3/9AT requires mounting on 0.31" x 0.31" (8.0 mm x 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Deviating from this layout increases junction-to-ambient thermal resistance and reduces sustained power dissipation capability, potentially compromising reliability during repeated surge events.
SMCG43CAHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 21.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCG)
SMCG43CAHE3/9AT FAQ
1.How can I place an order for SMCG43CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG43CAHE3/9AT 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 SMCG43CAHE3/9AT reliable?
The price and inventory of SMCG43CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG43CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG43CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG43CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG43CAHE3/9AT?
SMCG43CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG43CAHE3/9AT 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 SMCG43CAHE3/9AT?
For technical support, including SMCG43CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG43CAHE3/9AT requirements.
6.How does Aetrix verify that SMCG43CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG43CAHE3/9AT 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 SMCG43CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG43CAHE3/9AT?
All SMCG43CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG43CAHE3/9AT, 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 SMCG43CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG43CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG43CAHE3/9AT Tags
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