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Vishay General Semiconductor - Diodes Division SMCG24A-M3/9AT
- Part No.:
- SMCG24A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG24A-M3/9AT.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,803
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Product details
Overview
SMCG24A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) in the SMCG (DO-215AB) package, with a 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), and clamping voltage of 38.9 V at 38.6 A. It protects MOSFETs and signal lines in automotive powertrain control modules against inductive switching transients.
For engineers reviewing the SMCG24A-M3/9AT datasheet, SMCG24A-M3/9AT pinout, SMCG24A-M3/9AT application, or SMCG24A-M3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (RθJA = 75 °C/W), and bidirectional variant compatibility for robust ESD/surge protection design.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, responding to transients within picoseconds via avalanche breakdown. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low incremental surge resistance, critical for repeatable clamping under repetitive 10/1000 µs surges up to 1500 W.
Designed for surface-mount automated placement, it features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and is qualified to AEC-Q101 for automotive under-hood applications with operating junction temperature from –55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Confirmed breakdown range ensures reliable turn-on during overvoltage events without premature conduction. |
| VC @ IPPM | 38.9 V at 38.6 A - Clamping voltage under full 1500 W surge; determines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 1500 W - Peak pulse power handling capability with 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads; enables thermal derating above 25 °C ambient. |
| IFSM | 200 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against accidental polarity reversal or high-current faults. |
| Polarity | Unidirectional - Cathode marked by band; blocks reverse current until VBR exceeded, then clamps in reverse direction only. |
Pinout & Package
Package: SMCG (DO-215AB) - Low-profile, gull-wing surface-mount package with 2 terminals, UL 94 V-0 molding compound, and 0.220–0.245 inch body length. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return; carries full transient current during clamping. |
| Cathode | Reverse-biased node / Protected line connection | Connected to protected signal or power rail; voltage referenced to anode; band-marked end. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock per AEC stress test plan. |
| Halogen-free & RoHS compliant (M3 suffix) | Meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-201 Class 2 whisker resistance; suitable for green manufacturing. |
| Glass passivated junction | Ensures stable VBR over lifetime and temperature, low leakage (<1 µA at VWM), and immunity to moisture-induced parameter drift. |
| MSL Level 1 rating | Allows unlimited floor life and single reflow at peak 260 °C without preconditioning-ideal for high-yield SMT assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a), improving protection margin for downstream ICs. |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting microcontroller I/O and gate drivers in engine control units (ECUs) exposed to load dump and inductive kickback from solenoids and fuel injectors. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed across 24 V supply rail and ground, triggered within <1 ns to limit transient voltage to ≤38.9 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic interfaces while maintaining AEC-Q100 system-level compliance. | Use Scenario: Safeguarding analog sensor inputs (e.g., current shunt monitors, position encoders) connected to variable-frequency drives in factory automation systems. IC Role / Device Role / Timing Role: Parallel-connected TVS on 12–24 V signal lines, absorbing repetitive 1 kV/500 A surges induced by contactor switching and motor commutation. Use Value: Enables >100,000 surge cycles without parameter shift due to stable glass-passivated junction and 1500 W PPPM rating. |
| Telecom DC Power Feeds | Consumer Appliance Mainboard Protection |
Use Scenario: Guarding PoE-powered Ethernet switch ports and remote PHY interfaces against lightning-induced surges on 48 V DC feeds. IC Role / Device Role / Timing Role: Primary clamping element upstream of DC-DC converters, activated before secondary TVS or MOVs engage. Use Value: Reduces system-level surge test failure rate by limiting clamped voltage to 38.9 V-well below 45 V input rating of downstream buck controllers. | Use Scenario: Shielding microcontroller reset lines and communication buses (I²C, UART) in smart home appliances subject to ESD and relay bounce. IC Role / Device Role / Timing Role: Localized TVS on PCB near connector or switch, with cathode tied to protected line and anode to chassis ground. Use Value: Achieves >15 kV air discharge and >8 kV contact discharge per IEC 61000-4-2, validated using 100 ps rise-time pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/57T | Same VWM (24 V) and PPPM (400 W), but lower power rating; SMA (DO-214AC) package with higher RθJA (110 °C/W). | Not AEC-Q101 qualified; limited to industrial/commercial environments with lower surge severity. | Select when cost sensitivity outweighs automotive qualification and 1500 W surge headroom. |
| SMCG24CA-M3/9AT | Bidirectional variant with identical VWM (24 V), same package and AEC-Q101 rating, but symmetric clamping in both polarities. | Required for AC-coupled or floating signal lines where polarity reversal is possible (e.g., RS-485, CAN bus stubs). | Choose for bidirectional protection needs-no change in layout, but verify system-level polarity tolerance. |
Compared with SMAJ24A-E3/57T, SMCG24A-M3/9AT delivers 3.75× higher surge power and automotive qualification; versus SMCG24CA-M3/9AT, it offers lower capacitance and optimized unidirectional clamping for DC rails-critical for minimizing false triggering in 24 V power domains.
Availability
SMCG24A-M3/9AT is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive inputs, telecom DC power feeds, and consumer appliance mainboard protection requiring stable component supply and long-term lifecycle support.
Supply support for SMCG24A-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, TVS devices, and optoelectronics with emphasis on reliability, AEC-Q qualification, and green manufacturing.
The SMCG series was developed specifically for high-power, surface-mount transient suppression in harsh automotive and industrial environments-prioritizing low clamping voltage, stable VBR, and MSL Level 1 process compatibility.
FAQ
What is the clamping voltage of the SMCG24A-M3/9AT under full-rated surge current?
The SMCG24A-M3/9AT has a maximum clamping voltage (VC) of 38.9 V at 38.6 A, measured with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a 1500 W transient event and is confirmed in the Vishay datasheet Document Number 88457, Table on page 2. The SMCG24A-M3/9AT maintains this clamping performance across its specified operating temperature range.
Is the SMCG24A-M3/9AT qualified for automotive applications?
Yes, the SMCG24A-M3/9AT is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number 88457, page 1, "FEATURES" section). This qualification covers stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing-validating its suitability for under-hood automotive use. The SMCG24A-M3/9AT meets all requirements for automotive-grade transient suppression.
What does the "M3" suffix indicate in SMCG24A-M3/9AT?
The "M3" suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. It also confirms industrial-grade qualification and compliance with JEDEC J-STD-020 MSL Level 1. Unlike "E3", M3 ensures no brominated flame retardants in the molding compound-critical for environmental compliance in EU and Asian markets. The SMCG24A-M3/9AT satisfies these material requirements without trade-offs in electrical performance.
How does the SMCG24A-M3/9AT differ from the bidirectional SMCG24CA-M3/9AT?
The SMCG24A-M3/9AT is unidirectional (cathode-banded), clamping only in reverse bias, while SMCG24CA-M3/9AT is bidirectional with symmetrical breakdown in both directions. Both share identical VWM (24 V), PPPM (1500 W), and AEC-Q101 qualification-but the SMCG24A-M3/9AT exhibits lower junction capacitance and avoids false triggering on AC-coupled lines. Use SMCG24A-M3/9AT for DC power rails; choose SMCG24CA-M3/9AT only when polarity-agnostic protection is required.
What is the thermal resistance of the SMCG24A-M3/9AT, and how does it affect layout?
The SMCG24A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet (page 3, "THERMAL CHARACTERISTICS"). This value mandates minimum pad area and thermal vias for sustained power dissipation; reducing pad size increases RθJA and risks exceeding TJ(max) = 150 °C during repeated surges. Layout for SMCG24A-M3/9AT must adhere strictly to the recommended footprint to maintain rated PPPM.
SMCG24A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 38.6A
- 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)
SMCG24A-M3/9AT FAQ
1.How can I place an order for SMCG24A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG24A-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 SMCG24A-M3/9AT reliable?
The price and inventory of SMCG24A-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 SMCG24A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG24A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG24A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG24A-M3/9AT?
SMCG24A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG24A-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 SMCG24A-M3/9AT?
For technical support, including SMCG24A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG24A-M3/9AT requirements.
6.How does Aetrix verify that SMCG24A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG24A-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 SMCG24A-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG24A-M3/9AT?
All SMCG24A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG24A-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 SMCG24A-M3/9AT part is unused and in its original packaging.
Return procedure for SMCG24A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG24A-M3/9AT Tags
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