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Vishay General Semiconductor - Diodes Division SMCG43A-M3/57T
- Part No.:
- SMCG43A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG43A-M3/57T.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCG43A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for high-energy surge protection with a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM). It delivers 21.6 A peak pulse current (IPPM) and clamps transients to ≤69.4 V at that current, serving as primary overvoltage protection on DC power rails and signal lines in automotive and industrial control modules.
For engineers reviewing the SMCG43A-M3/57T datasheet, SMCG43A-M3/57T pinout, SMCG43A-M3/57T application, or SMCG43A-M3/57T equivalent, this device is selected for robust ESD and lightning-induced surge suppression where AEC-Q101 qualification, low incremental surge resistance, and halogen-free RoHS compliance are required in space-constrained PCB layouts.
Technical Context
This TVS diode operates as a clamping-type transient suppressor using an avalanche junction structure. Its glass-passivated chip enables fast response time (<1 ns) and stable breakdown characteristics under repetitive surge stress. The unidirectional polarity defines cathode-anode conduction behavior, with clamping action active only during reverse-biased overvoltage events.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation up to TJ = +150 °C. It meets J-STD-020 MSL Level 1 and withstands 200 A IFSM (8.3 ms half-sine) - critical for handling inrush surges in automotive power distribution networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for normal DC rail operation. |
| VBR min/max | 47.8 V / 52.8 V at IT = 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system nominal voltage. |
| VC @ IPPM | ≤69.4 V at 21.6 A (10/1000 μs) - Clamped voltage seen by protected IC; determines residual stress on downstream components. |
| PPPM | 1500 W - Peak transient energy absorption capability; qualifies for ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 testing. |
| ID @ VWM | ≤1.0 μA - Reverse leakage at rated stand-off; negligible power loss and signal integrity impact in standby. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive placement without derating at ambient ≤125 °C. |
| Package | SMCG (DO-215AB) - Surface-mount gull-wing leaded package with 8.0 mm × 8.0 mm copper pad requirement; optimized for automated assembly and thermal dissipation. |
Pinout & Package
SMCG43A-M3/57T uses the SMCG (DO-215AB) package: a dual-leaded, gull-wing surface-mount outline with cathode band marking. Leads are matte tin-plated and solderable per J-STD-002/JESD 22-B102. Polarity is unidirectional - the marked band denotes the cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path (low-side reference) | Connected to ground or low-impedance return path; establishes reference for clamping threshold. |
| Cathode | Reverse-biased input (high-side connection) | Connected to protected line (e.g., 43 V supply rail); avalanche breakdown occurs here during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for engine control units and ADAS power supplies. |
| Halogen-free & RoHS compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and EU RoHS Directive 2011/65/EU - supports green manufacturing and export compliance. |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR ≈ 21.6 V) versus competing TVS devices - reduces voltage overshoot stress on protected MOSFETs or CAN transceivers. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without moisture sensitivity concerns - eliminates bake preconditioning in production. |
| Glass passivated junction | Provides stable VBR over lifetime and immunity to humidity-induced parameter drift - critical for long-life industrial sensor nodes. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Guarding |
|---|---|
|
Use Scenario: Protecting 42 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Primary clamping element placed between battery input and upstream DC-DC converter input stage. Use Value: Limits transient voltage to ≤69.4 V, preventing damage to 75 V-rated input capacitors and enabling use of lower-voltage, cost-optimized regulators. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) in factory-floor pressure sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; unidirectional SMCG43A-M3/57T guards positive rail side of op-amp output stage. Use Value: Sub-1 ns response ensures clamping before sensitive amplifier inputs saturate or latch up - preserving measurement accuracy during field maintenance. |
| Telecom DC Power Input Stage | Consumer Device USB-C VBUS Line |
|
Use Scenario: Safeguarding PoE-powered network switches against induced surges on 48 V DC input derived from midspan injectors. IC Role / Device Role / Timing Role: First-line transient suppressor ahead of hot-swap controller and primary filter capacitor. Use Value: 1500 W PPPM rating handles multiple 10/1000 μs surges without degradation - extends service life in outdoor telecom cabinets. |
Use Scenario: Overvoltage protection on USB-C VBUS lines in portable monitors where accidental 20 V adapter misconnection may occur. IC Role / Device Role / Timing Role: Standoff voltage (43 V) exceeds USB PD 3.0 max (20 V) with margin, while clamping <69.4 V prevents damage to USB-C port controllers. Use Value: Halogen-free M3 construction aligns with consumer brand sustainability mandates without compromising surge immunity. |
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 PPPM (400 W), but lower 400 W rating and SMA (DO-214AC) package - 30% smaller footprint, 60% lower surge capacity. | Preferred for space-limited consumer electronics where 400 W suffices; unsuitable for automotive load dump. | Select SMAJ43A-E3/57T only when board area is constrained and surge threat level is limited to IEC 61000-4-2 ESD or low-energy transients. |
| SMCJ43A-M3/57T | Identical VWM (43 V), higher PPPM (3000 W), same SMCG package - double the surge energy handling with identical mounting and thermal interface. | Used in heavy-duty industrial motor drives where repeated 3 kV/500 A surges occur; requires no layout change but higher cost. | Choose SMCJ43A-M3/57T when system-level testing reveals marginal clamping margin with SMCG43A-M3/57T under worst-case surge repetition. |
Compared with SMAJ43A-E3/57T and SMCJ43A-M3/57T, SMCG43A-M3/57T delivers optimal balance of 1500 W surge capacity, AEC-Q101 qualification, and halogen-free compliance in a thermally efficient DO-215AB package - making it the default choice for mid-tier automotive and industrial power rail protection.
Availability
SMCG43A-M3/57T is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O cards, and telecom power supply inputs requiring stable component supply with full traceability and lifecycle continuity.
Supply support for SMCG43A-M3/57T 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 diodes, rectifiers, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The SMCG series was developed specifically for high-power, surface-mount transient suppression in harsh environments - targeting AEC-Q101-compliant automotive subsystems and industrial equipment needing robust 1500 W surge handling in compact footprints.
FAQ
What is the maximum clamping voltage of SMCG43A-M3/57T at its rated peak pulse current?
The SMCG43A-M3/57T has a maximum clamping voltage (VC) of 69.4 V when subjected to its specified peak pulse current (IPPM) of 21.6 A under the 10/1000 μs waveform. This value is measured per JEDEC standards and represents the highest voltage the protected circuit will experience during a full-rated surge event. The clamping performance is guaranteed across the full operating temperature range and is integral to designing safe voltage margins for downstream components like DC-DC controllers and gate drivers in the SMCG43A-M3/57T application circuit.
Is SMCG43A-M3/57T suitable for bidirectional transient suppression?
No, SMCG43A-M3/57T is a unidirectional TVS diode, as indicated by the "A" suffix and absence of "CA" in its part number. It conducts only in reverse bias above VBR and blocks forward current beyond VF ≈ 3.5 V at 100 A. For bidirectional protection, Vishay offers SMCG43CA-M3/57T - which has symmetric breakdown in both directions and no polarity marking. Using SMCG43A-M3/57T in AC-coupled or floating signal paths would leave one polarity unprotected, so correct device selection must match the signal topology in the SMCG43A-M3/57T design context.
Does SMCG43A-M3/57T require derating at elevated ambient temperatures?
Yes, SMCG43A-M3/57T must be derated above TA = 25 °C per Figure 2 in Vishay document 88457. Its peak pulse power (PPPM) decreases linearly to zero at TJ = +150 °C, with a thermal resistance RθJA of 75 °C/W. At TA = 85 °C, for example, the usable PPPM drops to approximately 1050 W. Designers must calculate actual junction temperature rise using PCB copper area (minimum 8.0 mm × 8.0 mm per pad) and confirm clamping performance remains within spec across the full operating range of the SMCG43A-M3/57T deployment environment.
What does the "M3" suffix signify in SMCG43A-M3/57T?
"M3" denotes halogen-free, RoHS-compliant construction meeting IPC-1752A material declarations, with matte tin-plated leads qualified to JESD 201 Class 2 whisker resistance. It replaces older "E3" (non-halogen-free RoHS) variants and is required for automotive and green-electronics programs. The "M3" suffix does not affect electrical parameters - SMCG43A-M3/57T shares identical VWM, VBR, PPPM, and thermal specs with SMCG43A-E3/57T - but ensures compliance with evolving environmental regulations governing the SMCG43A-M3/57T supply chain.
Can SMCG43A-M3/57T be used in place of SMAJ43A in an existing design?
SMCG43A-M3/57T cannot be directly substituted for SMAJ43A without layout review: it uses the larger SMCG (DO-215AB) package versus SMAJ's SMA (DO-214AC), requiring different pad dimensions and 3× higher surge capacity. While both share 43 V VWM, the SMCG43A-M3/57T's 1500 W PPPM and AEC-Q101 rating exceed SMAJ43A's 400 W and commercial qualification. Replacing SMAJ43A with SMCG43A-M3/57T demands PCB pad redesign and thermal validation but provides superior protection - especially in automotive SMCG43A-M3/57T implementations.
SMCG43A-M3/57T 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-M3/57T FAQ
1.How can I place an order for SMCG43A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG43A-M3/57T 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-M3/57T reliable?
The price and inventory of SMCG43A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG43A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG43A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG43A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG43A-M3/57T?
SMCG43A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG43A-M3/57T 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-M3/57T?
For technical support, including SMCG43A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG43A-M3/57T requirements.
6.How does Aetrix verify that SMCG43A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG43A-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG43A-M3/57T?
All SMCG43A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG43A-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for SMCG43A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG43A-M3/57T Tags
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