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Vishay General Semiconductor - Diodes Division SMCG43A-E3/57T
- Part No.:
- SMCG43A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG43A-E3/57T.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,188
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Product details
Overview
SMCG43A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, featuring a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), 21.6 A peak pulse current (IPPM), and 69.4 V maximum clamping voltage (VC) under 10/1000 µs surge. It protects MOSFETs and signal lines in automotive powertrain control modules against inductive switching transients.
For engineers reviewing the SMCG43A-E3/57T datasheet, SMCG43A-E3/57T pinout, SMCG43A-E3/57T application, or SMCG43A-E3/57T equivalent, this device is selected for high-energy transient suppression in AEC-Q101-compliant automotive subsystems where low clamping voltage, fast response time, and MSL Level 1 reflow compatibility are critical design requirements.
Technical Context
This TVS diode operates as a unidirectional clamping device with glass-passivated junction and matte tin-plated leads solderable per J-STD-002. Its 75 °C/W junction-to-ambient thermal resistance and 15 °C/W junction-to-lead resistance support reliable operation up to 150 °C junction temperature under transient stress.
The device delivers 1500 W peak pulse power handling with a 10/1000 µs waveform, clamps at ≤69.4 V when subjected to 21.6 A surge current, and exhibits ≤1.0 µA reverse leakage at 43 V - enabling robust protection of 48 V automotive electronics without compromising standby power integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping initiates; sets threshold for protection of 48 V rail systems. |
| VBR min/max | 47.8 V / 52.8 V at 1 mA - verified breakdown range ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 69.4 V at 21.6 A - clamping voltage limits downstream IC stress during ISO 7637-2 Pulse 1/2a/5a transients. |
| PPPM | 1500 W - peak surge energy absorption capability compatible with SAE J1113-11 Class III and ISO 16750-2 Level IV test profiles. |
| TJ max | +150 °C - enables deployment in engine bay and transmission control units without derating penalties. |
| MSL Level | Level 1 per J-STD-020 - supports standard reflow profiles up to 260 °C peak without moisture-induced failure. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TCT, and ESD HBM ≥8 kV. |
Pinout & Package
Package: SMCG (DO-215AB) - low-profile surface-mount case with 0.31" × 0.31" copper pad layout recommendation, UL 94 V-0 molding compound, and cathode band marking for polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground reference. | Provides low-impedance return path during clamping; requires direct connection to low-inductance ground plane. |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., 48 V supply or signal). | Band-marked lead; defines directionality - must be placed between threat source and load to enable unidirectional clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Low incremental surge resistance | Enables tighter clamping (VC − VBR = 21.6 V) versus competitive TVS devices, reducing voltage overshoot on sensitive gate drivers. |
| Glass passivated chip junction | Ensures stable VBR over lifetime and humidity exposure - critical for under-hood automotive applications with >15-year field life. |
| AEC-Q101 qualification | Validates performance across -55 °C to +150 °C cycling, mechanical shock, and accelerated life testing required for powertrain ECUs. |
| MSL Level 1 rating | Eliminates pre-bake requirement prior to SMT assembly, reducing manufacturing cost and cycle time in high-volume automotive PCB lines. |
| Matte tin plating | Complies with JESD 22-B102 and J-STD-002 for reliable solder wetting and whisker resistance (JESD 201 Class 2). |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 48 V battery-fed microcontroller I/O and gate driver inputs in electric power steering (EPS) modules. IC Role / Device Role / Timing Role: Unidirectional clamping element placed between HV supply rail and ASIC input pins to suppress load-dump and inductive kickback. Use Value: Limits transient voltage to ≤69.4 V, preventing latch-up or oxide breakdown in 40 V-rated CMOS interfaces while maintaining <1.0 µA leakage at nominal 43 V operation. |
Use Scenario: Surge suppression on encoder feedback lines and PWM input traces in servo motor drives exposed to relay switching noise. IC Role / Device Role / Timing Role: Fast-response TVS placed at board edge connectors to shunt EFT bursts (IEC 61000-4-4) before reaching FPGA or analog front-end. Use Value: Responds within picoseconds to clamp 1 kV/50 Ω EFT pulses to safe levels, preserving signal integrity on 100 kHz quadrature encoder signals without adding capacitance-induced jitter. |
| Telecom DC Power Feeds | On-Board Charger (OBC) Gate Drivers |
Use Scenario: Input-stage protection for PoE-powered remote radio units operating from 48 V DC distribution infrastructure. IC Role / Device Role / Timing Role: Primary transient limiter on DC input before DC/DC converter, coordinated with upstream fuse and secondary TVS stages. Use Value: Absorbs 1500 W surges per IEEE C62.41.2 Category B/C events without degradation, ensuring >100,000 surge cycles per MIL-STD-883H Method 3015.7. |
Use Scenario: Clamping of high-side SiC MOSFET gate drive lines in bidirectional OBC inverters subject to Miller-induced dv/dt spikes. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to gate driver IC output to suppress sub-10 ns ringing and overshoot. Use Value: Low clamping voltage (69.4 V) prevents unintended turn-on of 650 V SiC devices during fast switching transitions, improving system efficiency and reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/57T | Same VWM (43 V) and VC (69.4 V), but lower PPPM (400 W) and smaller SMA (DO-214AC) package with higher RθJA (110 °C/W). | Limited to lower-energy transients (e.g., IEC 61000-4-5 0.5 kV); unsuitable for ISO 7637-2 Pulse 5a in 48 V systems. | Select only for space-constrained non-automotive designs where surge energy remains below 400 W. |
| SMCJ43A-E3/57T | Identical electrical specs (VWM, VBR, VC, PPPM), same DO-214AB package footprint but larger body (7.11 mm × 6.22 mm vs. SMCG's 7.11 mm × 5.59 mm) and higher weight (0.33 g vs. 0.211 g). | Compatible with legacy layouts using SMC (DO-214AB); offers identical protection level but requires PCB area increase of ~18%. | Choose when redesigning for backward compatibility with existing SMC-based designs or when higher thermal mass is preferred. |
Compared with SMAJ43A-E3/57T and SMCJ43A-E3/57T, the SMCG43A-E3/57T delivers equivalent 1500 W surge capability in a 14% smaller footprint and 36% lower weight than SMCJ, while offering superior thermal performance (RθJA = 75 °C/W) over SMAJ - making it optimal for next-generation compact automotive ECUs.
Availability
SMCG43A-E3/57T is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive inputs, and telecom DC power feeds requiring stable component supply with AEC-Q101 qualification and MSL Level 1 reflow compatibility.
Supply support for SMCG43A-E3/57T 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMCG series was developed specifically for AEC-Q101-compliant transient suppression in space-constrained automotive electronics, emphasizing low-profile packaging, high surge robustness, and process-controlled clamping consistency.
FAQ
What is the clamping voltage of SMCG43A-E3/57T at its rated peak pulse current?
The SMCG43A-E3/57T has a maximum clamping voltage (VC) of 69.4 V when subjected to 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 ensures predictable voltage limiting during standardized surge events such as ISO 7637-2 Pulse 5a. The SMCG43A-E3/57T maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMCG43A-E3/57T suitable for bidirectional transient protection?
No, SMCG43A-E3/57T is a unidirectional Transient Voltage Suppressor, indicated by the "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies the SMCG43CA variant (e.g., SMCG43CA-E3/57T), which provides symmetrical clamping in both polarities. Using SMCG43A-E3/57T in AC-coupled or floating signal paths may result in forward conduction and failure; always verify polarity alignment in the SMCG43A-E3/57T application schematic.
What does the "E3/57T" suffix mean in SMCG43A-E3/57T?
The "E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads meeting J-STD-002 solderability and JESD 201 Class 2 whisker resistance. The "57T" indicates packaging in 7-inch diameter plastic tape and reel, with a base quantity of 850 units per reel. This configuration supports automated SMT placement and is validated for peak reflow temperatures up to 260 °C per J-STD-020 MSL Level 1.
How does SMCG43A-E3/57T compare to SMAJ43A-E3/57T in thermal performance?
The SMCG43A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, significantly lower than the SMAJ43A-E3/57T's 110 °C/W due to its larger copper pad layout (0.31" × 0.31") and optimized DO-215AB package geometry. This allows the SMCG43A-E3/57T to sustain higher average power dissipation (6.5 W at TA = 50 °C) and maintain lower junction temperatures during repetitive surge events - a key advantage in thermally dense automotive modules.
Does SMCG43A-E3/57T require derating above 25 °C ambient temperature?
Yes, SMCG43A-E3/57T must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet (Document Number: 88457). Its peak pulse power (PPPM) decreases linearly to zero at +150 °C junction temperature, with a defined derating curve based on initial TJ. Designers must calculate actual junction temperature using RθJA = 75 °C/W and ensure TJ remains ≤150 °C under worst-case surge repetition and ambient conditions - especially critical in engine compartment deployments.
SMCG43A-E3/57T 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCG43A-E3/57T FAQ
1.How can I place an order for SMCG43A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG43A-E3/57T 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 SMCG43A-E3/57T reliable?
The price and inventory of SMCG43A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG43A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG43A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG43A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG43A-E3/57T?
SMCG43A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG43A-E3/57T 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 SMCG43A-E3/57T?
For technical support, including SMCG43A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG43A-E3/57T requirements.
6.How does Aetrix verify that SMCG43A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG43A-E3/57T 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 SMCG43A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG43A-E3/57T?
All SMCG43A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG43A-E3/57T, 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 SMCG43A-E3/57T part is unused and in its original packaging.
Return procedure for SMCG43A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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