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Vishay General Semiconductor - Diodes Division SMCG43CA-M3/9AT
- Part No.:
- SMCG43CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG43CA-M3/9AT.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCG43CA-M3/9AT from Vishay General Semiconductor is a bidirectional surface-mount TransZORB® transient voltage suppressor (TVS) in the SMCG (DO-215AB) package, with 43 V stand-off voltage (VWM), 69.4 V clamping voltage (VC) at 21.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM). It is AEC-Q101 qualified and halogen-free, designed for automotive and industrial circuit protection against inductive switching transients and ESD on signal lines and power rails.
For engineers reviewing the SMCG43CA-M3/9AT datasheet, SMCG43CA-M3/9AT pinout, SMCG43CA-M3/9AT application, or SMCG43CA-M3/9AT equivalent, this device is selected for high-energy surge suppression in bidirectional signal paths where low clamping ratio, fast response (<1 ns), and robust MSL-1 reliability are required - especially in automotive sensor interfaces, CAN bus protection, and DC power input stages.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, with breakdown voltage (VBR) of 47.8–52.8 V at 1 mA test current and maximum reverse leakage (ID) ≤1.0 μA at 43 V. Its clamping behavior is defined under standardized 10/1000 μs waveform conditions, delivering consistent voltage limiting during transient events without polarity dependence.
Thermally, it features RθJA = 75 °C/W and RθJL = 15 °C/W, enabling effective heat dissipation when mounted on 8.0 mm × 8.0 mm copper pads per terminal. The device sustains junction temperatures from –55 °C to +150 °C and meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements.
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 line. |
| VBR min/max | 47.8 V / 52.8 V - Breakdown occurs within this band at 1 mA; ensures predictable turn-on margin above VWM. |
| VC @ IPPM | 69.4 V at 21.6 A - Clamped voltage during 10/1000 μs surge; limits downstream IC stress to safe levels. |
| PPPM | 1500 W - Peak transient energy handling capacity; supports high-energy surges like ISO 7637-2 Pulse 5a. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD. |
| Package | SMCG (DO-215AB) - Low-profile SMD outline with gull-wing leads; compatible with automated reflow assembly. |
Pinout & Package
SMCG43CA-M3/9AT uses the SMCG (DO-215AB) surface-mount package: a dual-leaded, gull-wing configuration with no polarity marking for bidirectional devices. Terminals are matte tin-plated and solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional conduction path | No polarity designation; either terminal serves as anode or cathode depending on transient polarity - enables single-device protection of AC or differential lines. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling, HTRB, and ESD robustness - eliminates need for additional qualification testing. |
| Halogen-free & RoHS compliant (M3 suffix) | Meets global environmental compliance mandates without compromising thermal or electrical performance. |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ≈ 1.37) and higher surge current handling versus standard TVS diodes. |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow at peak 260 °C - simplifies manufacturing logistics and eliminates bake requirements. |
| Glass passivated junction | Ensures stable VBR over time and temperature, with minimal parameter drift across 1000+ hours HTOL stress. |
Applications
| Automotive Sensor Interface Protection | CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors exposed to load dump and inductive kickback in engine control units. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient excursions to ≤69.4 V, preventing latch-up or damage to 5 V-tolerant SAR ADC inputs while maintaining signal integrity below 43 V. |
Use Scenario: Safeguarding CAN_H and CAN_L lines against ESD (IEC 61000-4-2) and coupled transients (ISO 7637-3) in body control modules. IC Role / Device Role / Timing Role: Differential TVS pair (one per line) referenced to ground, absorbing common-mode surges. Use Value: Clamps surges within <1 ns while adding <0.5 pF capacitance per line - preserves CAN bit timing and signal rise/fall integrity up to 1 Mbps. |
| Industrial DC Power Input Stage | Telecom Signal Line Protection |
Use Scenario: Front-end protection of 48 V DC power supplies in programmable logic controllers subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary TVS stage upstream of DC-DC converter input, shunting energy before filtering. Use Value: Absorbs 1500 W pulses without degradation, reducing required MOV size and enabling compact, high-reliability front-end designs. |
Use Scenario: Protecting RS-485 transceiver I/O pins in base station remote radio units exposed to induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional clamp on differential pair, referenced to local ground plane. Use Value: Maintains signal fidelity with <1.0 μA leakage at 43 V, minimizing offset error in precision bias networks while surviving 8 kV contact ESD. |
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-E3/57T | Same VWM (43 V) and VC (69.4 V), but lower PPPM (400 W); SMA (DO-214AC) package with higher RθJA (110 °C/W). | Not suitable for 1500 W surge events; limited to lower-energy transients like ESD or low-level inductive spikes. | Select only if system-level surge testing confirms <400 W requirement and board space constraints favor SMA footprint. |
| SMCJ43CA-M3/9AT | Identical VWM (43 V), VC (69.4 V), and PPPM (1500 W); same AEC-Q101 and M3 compliance; SMC (DO-214AB) package with larger thermal mass. | Higher thermal inertia allows longer surge duration tolerance; requires larger PCB pad area (10.16 mm × 7.87 mm vs. 7.87 mm × 7.87 mm). | Prefer when ambient temperature exceeds 105 °C or surge repetition rate is >0.1 Hz - leverages superior steady-state thermal performance. |
Compared with SMAJ43CA-E3/57T, SMCG43CA-M3/9AT delivers 3.75× higher surge power handling and better thermal management; versus SMCJ43CA-M3/9AT, it offers identical protection specs in a 15% smaller footprint - ideal for space-constrained automotive modules where layout density is critical.
Availability
SMCG43CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN bus protection, and industrial DC power input stages requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG43CA-M3/9AT 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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade validation.
The SMCG series was developed specifically for high-power, space-constrained transient suppression in automotive and industrial systems - balancing low profile, AEC-Q101 compliance, and 1500 W surge capability in a DO-215AB outline.
FAQ
What is the clamping voltage of SMCG43CA-M3/9AT at its rated peak pulse current?
The SMCG43CA-M3/9AT has a maximum clamping voltage (VC) of 69.4 V when subjected to its rated peak pulse current (IPPM) of 21.6 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see limited overvoltage during surge events. The SMCG43CA-M3/9AT maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMCG43CA-M3/9AT suitable for automotive applications?
Yes, SMCG43CA-M3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. It passes temperature cycling, high-temperature reverse bias (HTRB), and ESD tests per AEC-Q101 Rev D. The SMCG43CA-M3/9AT's halogen-free (M3) construction, MSL Level 1 rating, and –55 °C to +150 °C operating range make it appropriate for engine control units, ADAS sensor modules, and body electronics.
How does the bidirectional design of SMCG43CA-M3/9AT affect its circuit implementation?
The bidirectional design of SMCG43CA-M3/9AT means it conducts identically in both directions - no cathode marking is present, and either terminal functions as anode or cathode depending on transient polarity. This allows single-device protection of AC-coupled or differential signal lines (e.g., CAN, RS-485) without polarity concerns. The SMCG43CA-M3/9AT achieves symmetrical VBR (47.8–52.8 V) and VC in both directions, ensuring balanced clamping performance.
What is the thermal resistance of SMCG43CA-M3/9AT, and how does it impact layout?
SMCG43CA-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To achieve rated power dissipation, PCB layout must replicate this pad area - undersized pads increase thermal impedance and reduce surge survivability. The SMCG43CA-M3/9AT's low RθJL supports efficient heat transfer to the PCB plane, critical for repeated surge events.
Does SMCG43CA-M3/9AT meet RoHS and halogen-free requirements?
Yes, the "M3" suffix in SMCG43CA-M3/9AT denotes halogen-free, RoHS-compliant construction per EU Directive 2011/65/EU and JEDEC JS709. It contains no brominated flame retardants, chlorine, or fluorine above threshold limits, and complies with Vishay's material categorization standard (doc# 99912). The SMCG43CA-M3/9AT also meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements.
SMCG43CA-M3/9AT 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG43CA-M3/9AT FAQ
1.How can I place an order for SMCG43CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG43CA-M3/9AT 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 SMCG43CA-M3/9AT reliable?
The price and inventory of SMCG43CA-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG43CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG43CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG43CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG43CA-M3/9AT?
SMCG43CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG43CA-M3/9AT 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 SMCG43CA-M3/9AT?
For technical support, including SMCG43CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG43CA-M3/9AT requirements.
6.How does Aetrix verify that SMCG43CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG43CA-M3/9AT 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 SMCG43CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG43CA-M3/9AT?
All SMCG43CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG43CA-M3/9AT, 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 SMCG43CA-M3/9AT part is unused and in its original packaging.
Return procedure for SMCG43CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG43CA-M3/9AT Tags
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