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Vishay General Semiconductor - Diodes Division SMCG48CA-E3/9AT
- Part No.:
- SMCG48CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG48CA-E3/9AT.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,800
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Product details
Overview
SMCG48CA-E3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive signal and power lines. It features a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and clamps to ≤77.4 V at 19.4 A (10/1000 µs waveform), making it suitable for automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMCG48CA-E3/9AT datasheet, SMCG48CA-E3/9AT pinout, SMCG48CA-E3/9AT application, or SMCG48CA-E3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), DO-215AB mechanical dimensions, and real-world use cases in bidirectional surge suppression for CAN, LIN, and analog sensor lines.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical VBR min/max (53.3 V / 58.9 V), ID ≤1.0 µA at VWM, and clamping voltage VC = 77.4 V at IPPM = 19.4 A under 10/1000 µs transients. Its glass-passivated junction ensures stable leakage and fast response (<1 ns), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
The device uses a planar silicon avalanche structure optimized for low incremental surge resistance and high surge current capability (IFSM = 200 A for unidirectional variants; not applicable here due to bidirectional symmetry). Thermal performance is defined by RθJL = 15 °C/W and RθJA = 75 °C/W on 8.0 mm × 8.0 mm copper pads - critical for sustained surge duty cycles in automotive ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working range for 48 V nominal systems. |
| VBR (min/max) | 53.3 V / 58.9 V - Breakdown occurs within this band at 1 mA test current; ensures reliable triggering above system operating voltage. |
| VC @ IPPM | 77.4 V @ 19.4 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to <78 V under rated transient. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 µs waveform; enables protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at 48 V; negligible power loss and no signal distortion in high-impedance sensor lines. |
| TJ max. | +150 °C - Maximum junction temperature; supports under-hood automotive placement with full derating per Fig. 2. |
| Package | SMCG (DO-215AB) - Surface-mount gull-wing package with 0.31" × 0.31" pad layout; compatible with automated SMT assembly and IPC-7351B footprint. |
Pinout & Package
SMCG48CA-E3/9AT uses the DO-215AB (SMCG) surface-mount package: gull-wing leads, matte tin-plated terminals, no polarity marking (bidirectional), and UL 94 V-0 molding compound. Dimensions: 7.87 mm × 9.64 mm × 2.41 mm (L × W × H), with 0.51 mm max lead thickness and 1.47 mm lead span.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | One side of symmetrical avalanche junction; connects to line being protected (e.g., CAN_H or LIN bus). |
| Cathode | Terminal K | Other side of symmetrical junction; ties to same line (no polarity distinction); forms bidirectional clamp path between Anode and Cathode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| MSL Level 1 | Rated for peak reflow at 260 °C without moisture-induced damage - eliminates bake requirements prior to assembly. |
| Glass passivated junction | Stable VBR tolerance and low leakage over lifetime; prevents parameter drift in humid or high-T environments. |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ratio ≈ 1.45) versus standard TVS, reducing voltage overshoot on protected nodes. |
| Bidirectional symmetry | Identical VBR, VC, and IPPM in both directions - simplifies design for AC-coupled or floating buses like CAN FD or RS-485. |
Applications
| Automotive Sensor Protection | CAN/LIN Bus Protection |
|---|---|
Use Scenario: Protecting analog output sensors (e.g., pressure, temperature) in engine control modules from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor supply and ground, shunting >1 kV spikes before they reach ADC inputs or signal conditioners. Use Value: Maintains signal integrity with ≤1.0 µA leakage at 48 V, enabling direct connection to 12/24/48 V vehicle architectures without additional biasing. |
Use Scenario: Safeguarding high-speed CAN FD or LIN transceivers against ESD (IEC 61000-4-2) and burst noise (IEC 61000-4-4) in gateway ECUs. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) bidirectional clamp across differential bus lines (CAN_H/CAN_L), preserving signal edge rate and common-mode rejection. Use Value: Clamps to 77.4 V within nanoseconds, preventing transceiver latch-up while meeting ISO 11898-2 EMC immunity requirements. |
| Industrial I/O Protection | Power Supply Rail Clamp |
Use Scenario: Shielding PLC digital input channels from field-wiring induced surges (e.g., relay coil flyback, lightning coupling). IC Role / Device Role / Timing Role: Primary front-end TVS on 24 V DC input lines, mounted directly at connector entry point to minimize inductance before protection. Use Value: Withstands 1500 W pulses and 200 A single-half-sine surges (unidirectional reference), delivering robustness beyond IEC 61000-4-5 Level 4. |
Use Scenario: Secondary overvoltage clamp on regulated 48 V intermediate bus in telecom rectifiers or server PSUs. IC Role / Device Role / Timing Role: Fast-acting crowbar element that activates only during fault conditions (e.g., feedback loop failure), limiting rail excursion to 77.4 V. Use Value: Low RθJA (75 °C/W) allows operation at full PPPM without heatsink in compact enclosures, supporting high-density PSU designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48CA | Same VWM (48 V) and PPPM (400 W), but lower power rating; SMA package (DO-214AC), higher RθJA (~100 °C/W). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 Pulse 5a. | Select when board space is constrained and surge energy is <400 W; verify thermal margin at 100 °C/W. |
| SMCJ48CA | Same VWM (48 V) and PPPM (1500 W), but larger SMC (DO-214AB) package; RθJA ≈ 40 °C/W, higher IFSM (400 A). | Better thermal performance and surge endurance; requires larger PCB footprint and different pad layout. | Choose for high-reliability industrial power rails where long-term thermal stability outweighs size constraints. |
Compared with SMAJ48CA and SMCJ48CA, SMCG48CA-E3/9AT delivers identical 1500 W surge capability in a smaller DO-215AB footprint than SMCJ, while offering superior thermal resistance (75 °C/W vs. 100 °C/W) and AEC-Q101 qualification absent in SMAJ - making it optimal for space-constrained automotive modules requiring production-grade reliability.
Availability
SMCG48CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN/LIN bus protection, and industrial I/O circuits requiring stable component supply, AEC-Q101 compliance, and RoHS-compliant packaging.
Supply support for SMCG48CA-E3/9AT 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMCG series targets high-energy transient suppression in automotive and industrial environments, engineered for AEC-Q101 compliance, low-profile SMT assembly, and consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of SMCG48CA-E3/9AT at its rated peak pulse current?
The SMCG48CA-E3/9AT clamps to a maximum of 77.4 V at its rated peak pulse current of 19.4 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet (Doc. #88457, Rev. 09-Jan-2024), ensuring predictable overvoltage limiting for downstream circuitry.
Is SMCG48CA-E3/9AT suitable for automotive applications?
Yes, SMCG48CA-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its +150 °C maximum junction temperature, MSL Level 1 reflow compatibility, and validated performance across temperature cycling and humidity tests make it appropriate for engine control units, ADAS sensors, and body electronics where SMCG48CA-E3/9AT is deployed as primary surge protection.
Does SMCG48CA-E3/9AT have polarity markings on the package?
No, SMCG48CA-E3/9AT has no polarity markings because it is a bidirectional TVS diode. The DO-215AB package features symmetric terminals - both ends function identically as either anode or cathode depending on transient polarity - eliminating orientation concerns during automated placement and simplifying PCB layout for differential or AC-coupled lines.
What is the thermal resistance junction-to-ambient for SMCG48CA-E3/9AT?
The typical thermal resistance junction-to-ambient (RθJA) for SMCG48CA-E3/9AT is 75 °C/W, measured on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad layout per terminal. This value is critical for calculating steady-state temperature rise under continuous power dissipation and must be used with the 6.5 W power rating to ensure SMCG48CA-E3/9AT remains within its +150 °C TJ limit.
How does the SMCG48CA-E3/9AT differ from unidirectional variants like SMCG48A?
SMCG48CA-E3/9AT is bidirectional with symmetrical VBR (53.3–58.9 V) and clamping in both directions, while SMCG48A is unidirectional with a cathode band and forward voltage drop (VF = 3.5 V at 100 A). SMCG48CA-E3/9AT supports AC or floating signal lines (e.g., CAN, RS-485), whereas SMCG48A is intended for DC rail protection where polarity is fixed and forward conduction may occur.
SMCG48CA-E3/9AT 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 19.4A
- 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)
SMCG48CA-E3/9AT FAQ
1.How can I place an order for SMCG48CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG48CA-E3/9AT 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 SMCG48CA-E3/9AT reliable?
The price and inventory of SMCG48CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG48CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG48CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG48CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG48CA-E3/9AT?
SMCG48CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG48CA-E3/9AT 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 SMCG48CA-E3/9AT?
For technical support, including SMCG48CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG48CA-E3/9AT requirements.
6.How does Aetrix verify that SMCG48CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG48CA-E3/9AT 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 SMCG48CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG48CA-E3/9AT?
All SMCG48CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG48CA-E3/9AT, 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 SMCG48CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG48CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG48CA-E3/9AT Tags
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