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Vishay General Semiconductor - Diodes Division SMCG33A-M3/57T
- Part No.:
- SMCG33A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG33A-M3/57T.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,740
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Product details
Overview
SMCG33A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) in the SMCG (DO-215AB) package, designed for robust overvoltage protection of power rails and signal lines. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 53.3 V clamping voltage at 28.1 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG33A-M3/57T datasheet, SMCG33A-M3/57T pinout, SMCG33A-M3/57T application, or SMCG33A-M3/57T equivalent, this device is selected for high-energy surge suppression in DC power inputs, automotive ECUs, and industrial sensor interfaces where low clamping voltage, fast response (<1 ns), and halogen-free RoHS compliance are critical design requirements.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for stable avalanche behavior under repetitive transients. Its thermal resistance (RθJA = 75 °C/W) and junction temperature rating (TJ max = 150 °C) support operation on standard 8.0 mm × 8.0 mm copper pads without forced cooling.
The device complies with ANSI/IEEE C62.35 for surge testing and meets JESD201 Class 2 whisker resistance. Its 10/1000 µs waveform rating and 200 A IFSM (8.3 ms half-sine) enable protection against both lightning-induced surges and inductive switching spikes in 12 V and 24 V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 33 V nominal systems. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on above system overvoltage threshold. |
| VC @ IPPM | 53.3 V at 28.1 A - Clamping voltage during 1500 W transient; limits downstream IC stress to ≤53.3 V under worst-case surge. |
| PPPM | 1500 W (10/1000 µs) - Peak surge energy handling capacity; supports IEC 61000-4-5 Level 4 (4 kV) compliance with appropriate layout. |
| ID @ VWM | 1.0 µA - Reverse leakage at rated stand-off; negligible power loss and signal integrity impact in high-impedance monitoring paths. |
| TJ max | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive environments and sealed industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive electronic control units per stress test requirements including HTOL, TCT, and ESD. |
Pinout & Package
Package: SMCG (DO-215AB) - Surface-mount gull-wing leaded case with matte tin-plated terminals, UL 94 V-0 molding compound, and MSL Level 1 moisture sensitivity (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; forms current path during reverse-biased clamping event. |
| Cathode | High-side protected node terminal | Connected to protected line (e.g., battery rail); marked by band; carries full surge current into ground during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant construction | M3 suffix confirms halogen-free molding compound and plating-meets automotive OEM environmental mandates (e.g., GMW3172, Ford WSS-M99P9999-A1). |
| Low incremental surge resistance | Enables tight clamping (VC/VBR ratio ≈ 1.43) and minimal voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a). |
| Fast response time | <1 ns junction response-prevents sub-microsecond ESD or EFT events from propagating to sensitive analog or digital circuitry. |
| Automated placement compatibility | Gull-wing leads and standardized DO-215AB footprint support high-yield SMT assembly on 7" tape-and-reel (57T) format. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak-eliminates bake requirements and reduces manufacturing overhead. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs (e.g., body control modules) against load dump (ISO 16750-2) and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients before LDO or DC/DC converter. Use Value: Limits voltage to ≤53.3 V during 1500 W surges, preventing damage to 36 V-rated input stages while maintaining AEC-Q101 reliability. |
Use Scenario: Shielding 4–20 mA current-loop sensor outputs from field-induced transients in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: TVS mounted across signal and return lines at connector entry point to shunt induced common-mode energy. Use Value: Sub-1 ns response and 1.0 µA leakage preserve loop accuracy and prevent false triggering in precision analog measurement circuits. |
| DC Power Supply Rail Protection | Telecom Interface Surge Suppression |
Use Scenario: Safeguarding 24 V industrial power supplies feeding motor drives and programmable logic controllers. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side output rail, coordinated with upstream MOVs and fuses. Use Value: 1500 W rating handles repetitive switching surges; 75 °C/W RθJA allows thermal stability on standard PCB copper areas. |
Use Scenario: Protecting RS-485 transceiver bus lines in outdoor telecom base stations exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional-capable variant family member (though SMCG33A-M3/57T is unidirectional, used in asymmetric rail-ground configurations). Use Value: Low clamping voltage preserves signal integrity across wide common-mode ranges; AEC-Q101 qualification validates long-term field 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 |
|---|---|---|---|
| SMAJ33A-E3/57T | Same VWM (33 V) and PPPM (400 W), but lower power rating; SMA (DO-214AC) package, smaller footprint, higher RθJA (110 °C/W). | Lower energy handling suits consumer electronics or low-risk signal lines-not recommended for automotive load dump. | Select SMAJ33A-E3/57T only when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4. |
| SMCJ33A-M3/57T | Same VWM (33 V) and DO-215AB package, but 3000 W PPPM rating and higher IPPM (59.3 A); identical M3 halogen-free compliance. | Higher power handling supports harsher environments (e.g., commercial vehicle alternator ripple + load dump combined). | Choose SMCJ33A-M3/57T when system-level testing requires margin beyond 1500 W or dual-threat scenarios are present. |
Compared with SMCG33A-M3/57T, SMAJ33A-E3/57T offers space savings at the cost of surge capacity, while SMCJ33A-M3/57T delivers double the peak power in the same footprint-enabling scalable protection architecture without layout revision.
Availability
SMCG33A-M3/57T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and DC power supply rail protection requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for SMCG33A-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive qualification.
The SMCG series targets high-energy transient suppression in space-constrained, thermally demanding applications-designed specifically for automotive, industrial, and telecom systems needing AEC-Q101-certified, halogen-free TVS solutions in DO-215AB packaging.
FAQ
What is the clamping voltage of SMCG33A-M3/57T at its rated peak pulse current?
The SMCG33A-M3/57T has a maximum clamping voltage (VC) of 53.3 V at its specified peak pulse current (IPPM) of 28.1 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during a full-rated surge event. The SMCG33A-M3/57T maintains this clamping performance across its qualified operating temperature range.
Is SMCG33A-M3/57T suitable for automotive applications?
Yes, SMCG33A-M3/57T is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its 150 °C maximum junction temperature, halogen-free M3 construction, and validation against HTOL, temperature cycling, and ESD stress make it suitable for engine control units, body electronics, and ADAS power domains. The SMCG33A-M3/57T meets OEM requirements for long-term reliability in vibration-prone, thermally aggressive settings.
What does the "M3" suffix indicate in SMCG33A-M3/57T?
The "M3" suffix in SMCG33A-M3/57T denotes halogen-free, RoHS-compliant construction-including molding compound and matte tin lead plating-meeting automotive environmental standards such as GMW3172 and Ford WSS-M99P9999-A1. It also confirms JESD201 Class 2 whisker resistance and MSL Level 1 handling. The SMCG33A-M3/57T shares all electrical specifications with E3-suffix variants but adds halogen-free assurance for regulated supply chains.
How does SMCG33A-M3/57T differ from bidirectional TVS diodes like SMCG33CA-M3/57T?
SMCG33A-M3/57T is unidirectional, with polarity marked by a cathode band and intended for DC rail protection where reverse conduction must be blocked. In contrast, SMCG33CA-M3/57T is bidirectional, lacks polarity marking, and clamps symmetrically in both directions-used for AC lines or data buses. The SMCG33A-M3/57T exhibits forward voltage drop (~3.5 V at 100 A) and reverse leakage <1.0 µA at 33 V, whereas the CA version shows matched breakdown in both polarities.
What PCB pad layout is recommended for optimal thermal and surge performance of SMCG33A-M3/57T?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for SMCG33A-M3/57T to achieve rated 1500 W pulse power and 75 °C/W thermal resistance. Thermal vias under pads and internal ground/power planes further reduce RθJA. Deviating from this layout degrades both surge handling and steady-state power dissipation-verified in Figure 2 and Table "Maximum Ratings." The SMCG33A-M3/57T must be placed per the DO-215AB outline drawing to ensure solder joint integrity and mechanical reliability.
SMCG33A-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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 28.1A
- 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)
SMCG33A-M3/57T FAQ
1.How can I place an order for SMCG33A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG33A-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 SMCG33A-M3/57T reliable?
The price and inventory of SMCG33A-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 SMCG33A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG33A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG33A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG33A-M3/57T?
SMCG33A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG33A-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 SMCG33A-M3/57T?
For technical support, including SMCG33A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG33A-M3/57T requirements.
6.How does Aetrix verify that SMCG33A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG33A-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 SMCG33A-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG33A-M3/57T?
All SMCG33A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG33A-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 SMCG33A-M3/57T part is unused and in its original packaging.
Return procedure for SMCG33A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG33A-M3/57T Tags
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