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Vishay General Semiconductor - Diodes Division SMCG43CA-M3/57T
- Part No.:
- SMCG43CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG43CA-M3/57T.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,744
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Product details
Overview
SMCG43CA-M3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the SMCG (DO-215AB) package, rated for 43 V standoff voltage (VWM), 1500 W peak pulse power (PPPM), and clamping voltage of 69.4 V at 21.6 A IPPM. It provides robust ESD and surge protection for automotive-grade signal lines and power rails in sensor interfaces and control modules.
For engineers reviewing the SMCG43CA-M3/57T datasheet, SMCG43CA-M3/57T pinout, SMCG43CA-M3/57T application, or SMCG43CA-M3/57T equivalent, this device is selected for high-reliability transient suppression where AEC-Q101 qualification, halogen-free construction (M3 suffix), and low clamping ratio (VC/VWM ≈ 1.61) are critical design requirements.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 47.8–52.8 V (min/max) under 1 mA test current. Its low incremental surge resistance enables rapid energy diversion during 10/1000 μs transients without thermal runaway.
Designed for automotive environments, it features a maximum junction temperature of +150 °C, meets MSL Level 1 per J-STD-020, and uses glass-passivated junction technology for stable leakage performance (<1.0 μA at VWM) and long-term reliability under repeated surge stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 36 V automotive systems. |
| VBR (min/max) | 47.8 V / 52.8 V - Breakdown occurs within this band at 1 mA; ensures predictable turn-on across temperature and lot variation. |
| VC @ IPPM | 69.4 V at 21.6 A - Clamped voltage during 10/1000 μs surge; limits downstream IC stress to <70 V under full-rated transient. |
| PPPM | 1500 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity with margin. |
| ID @ VWM | ≤1.0 μA - Reverse leakage at rated standoff; negligible power loss and signal distortion in high-impedance sensor lines. |
| TJ max. | +150 °C - Enables operation in under-hood automotive locations without derating in most PCB layouts. |
| Package | SMCG (DO-215AB) - Low-profile SMD outline with 0.220–0.245" body length; compatible with automated pick-and-place and reflow. |
Pinout & Package
SMCG43CA-M3/57T uses the DO-215AB (SMCG) surface-mount package: symmetrical dual-leaded gull-wing configuration with no polarity marking for bidirectional operation. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current in either direction when voltage exceeds ±VBR. |
| Leads (L1/L2) | PCB interconnect interface | Gull-wing leads provide mechanical compliance and thermal path to copper pads; require 8.0 mm × 8.0 mm pad per terminal per spec. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, and ESD; supports PPAP documentation. |
| Halogen-free (M3 suffix) | Complies with IEC 61249-2-21 and JEDEC JS709E; eliminates brominated flame retardants without compromising UL 94 V-0 rating. |
| Low clamping ratio (VC/VWM) | 1.61 - Minimizes overvoltage exposure to protected ICs compared to alternatives with ratios >1.8. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH; no baking required prior to reflow, reducing manufacturing overhead. |
| Glass-passivated junction | Stable VBR and ID over time and temperature; eliminates risk of moisture-induced parameter drift in humid environments. |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
Use Scenario: Protecting LIN or SENT signal lines in engine control modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to shunt transients before reaching MCU input pins. Use Value: Withstands 1500 W surges while clamping to 69.4 V, ensuring microcontroller I/O remains below absolute maximum ratings during 12 V system faults. |
Use Scenario: Guarding CANH/CANL differential pair against ESD (IEC 61000-4-2 ±8 kV contact) and fast transients in factory automation nodes. IC Role / Device Role / Timing Role: Paired devices (one per line) providing symmetrical clamping without affecting CAN signal integrity or common-mode range. Use Value: Sub-1 μA leakage at 43 V VWM prevents bus bias shift; 69.4 V VC ensures transceivers survive >4 kV EFT bursts without latch-up. |
| Telecom Power Rail Clamp | Consumer USB Port Surge Shield |
Use Scenario: Safeguarding 48 V PoE-powered equipment front-end DC-DC converters from lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary clamp on input rail, coordinated with upstream fuse and secondary TVS for staged protection. Use Value: 1500 W PPPM handles multi-kA induced surges; DO-215AB footprint allows compact placement near RJ45 magnetics with minimal trace inductance. |
Use Scenario: Protecting USB 2.0 D+/D− lines in portable chargers and docking stations against human-body-model ESD events. IC Role / Device Role / Timing Role: Bidirectional suppressor placed adjacent to USB connector to limit voltage excursion during ±15 kV air discharge. Use Value: 43 V VWM avoids false triggering during normal 5 V signaling; 69.4 V VC guarantees PHY ICs remain within safe operating area during 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 | Same VWM (43 V) and bidirectional topology, but SMA (DO-214AC) package; lower PPPM (400 W); higher RθJA (110 °C/W). | Limited to lower-energy transients (e.g., IEC 61000-4-2 only); unsuitable for IEC 61000-4-5 Level 3+ due to power derating. | Select SMAJ43CA only when board space permits larger SMA footprint and surge requirements are ≤400 W. |
| SMCJ43CA | Same DO-214AB package family but larger body; identical VWM and PPPM (1500 W); higher IPPM (32.4 A); same clamping voltage (69.4 V). | Offers identical electrical performance but requires larger PCB area and higher assembly cost; not halogen-free by default (M3 suffix optional). | Choose SMCJ43CA if existing layout accommodates DO-214AB and AEC-Q101/halogen-free compliance is not mandatory. |
Compared with SMAJ43CA and SMCJ43CA, SMCG43CA-M3/57T delivers equivalent 1500 W surge capability in the smallest DO-215AB footprint, with guaranteed halogen-free and AEC-Q101 compliance-making it optimal for space-constrained, automotive-qualified designs requiring zero compromise on environmental or reliability specs.
Availability
SMCG43CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus hardening, and telecom power rail clamping requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for SMCG43CA-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, automotive qualification, and green manufacturing.
The SMCG series was developed specifically for AEC-Q101-compliant transient suppression in compact automotive and industrial electronics, prioritizing low-profile packaging, halogen-free materials, and consistent clamping performance across temperature.
FAQ
What does the "CA" suffix indicate in SMCG43CA-M3/57T?
The "CA" suffix denotes a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., SMCG43A), SMCG43CA-M3/57T conducts symmetrically in both directions-clamping positive and negative transients equally above ±VBR. This makes it ideal for AC-coupled or differential signal lines such as CAN, LIN, or telecom interfaces where polarity reversal is possible.
Is SMCG43CA-M3/57T compliant with automotive reliability standards?
Yes, SMCG43CA-M3/57T is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and electrostatic discharge (HBM/MM). The M3 suffix further confirms halogen-free construction and RoHS compliance-both required for modern automotive ECUs and ADAS modules.
How does the DO-215AB (SMCG) package compare to DO-214AB (SMCJ) in thermal performance?
SMCG43CA-M3/57T in DO-215AB has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, versus ~50 °C/W for DO-214AB. While the SMCG package is smaller, its thermal path relies more heavily on proper 8.0 mm × 8.0 mm copper pad layout per lead. Derating curves in the datasheet must be applied for ambient temperatures above 25 °C to maintain 1500 W PPPM capability.
What is the significance of the "M3" in SMCG43CA-M3/57T?
The "M3" indicates halogen-free, RoHS-compliant, industrial-grade construction. It specifies matte tin-plated leads meeting JESD 201 Class 2 whisker resistance, UL 94 V-0 molding compound, and absence of brominated flame retardants. This distinguishes it from "E3" (RoHS but not halogen-free) and "HM3" (halogen-free + AEC-Q101), confirming SMCG43CA-M3/57T meets both environmental and industrial reliability requirements.
Can SMCG43CA-M3/57T replace SMCG43A in an existing unidirectional design?
No-SMCG43CA-M3/57T is bidirectional and lacks polarity marking, while SMCG43A is unidirectional with cathode band identification. Substituting them without circuit review risks improper clamping behavior: SMCG43CA-M3/57T will conduct on both half-cycles, potentially disrupting DC bias or forward-biased paths. Use only where bidirectional protection is explicitly required and layout supports symmetrical placement.
SMCG43CA-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:
- -
- 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-M3/57T FAQ
1.How can I place an order for SMCG43CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG43CA-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 SMCG43CA-M3/57T reliable?
The price and inventory of SMCG43CA-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 SMCG43CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG43CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG43CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG43CA-M3/57T?
SMCG43CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG43CA-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 SMCG43CA-M3/57T?
For technical support, including SMCG43CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG43CA-M3/57T requirements.
6.How does Aetrix verify that SMCG43CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG43CA-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 SMCG43CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG43CA-M3/57T?
All SMCG43CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG43CA-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 SMCG43CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCG43CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG43CA-M3/57T Tags
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