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Vishay General Semiconductor - Diodes Division SMCG48A-E3/9AT
- Part No.:
- SMCG48A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG48A-E3/9AT.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,200
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Product details
Overview
SMCG48A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, with a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and 19.4 A peak pulse current (IPPM) under 10/1000 µs waveform - designed to protect MOSFETs, ICs, and sensor signal lines in automotive power electronics.
For engineers reviewing the SMCG48A-E3/9AT datasheet, SMCG48A-E3/9AT pinout, SMCG48A-E3/9AT application, or SMCG48A-E3/9AT equivalent, key selection criteria include clamping voltage (77.4 V at IPPM), low incremental surge resistance, AEC-Q101 qualification, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology for fast response (<1 ns) and stable breakdown behavior. Its thermal resistance (RθJA = 75 °C/W) and junction temperature range (–55 °C to +150 °C) support operation in high-reliability automotive environments.
The SMCG48A-E3/9AT is rated for 6.5 W steady-state power dissipation at TA = 50 °C and withstands non-repetitive 200 A forward surge current (IFSM, 8.3 ms half-sine), making it suitable for protecting against inductive load switching transients in 12 V/24 V vehicle subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 53.3 V / 58.9 V at IT = 1 mA - ensures reliable turn-on within defined tolerance band |
| VC @ IPPM | 77.4 V at 19.4 A - clamping voltage limits downstream component stress during surge events |
| PPPM | 1500 W - peak transient energy absorption capability under standardized 10/1000 µs waveform |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - enables use in under-hood automotive locations without derating penalties |
| AEC-Q101 | Qualified - validated for automotive-grade reliability per stress test requirements |
Pinout & Package
Package: SMCG (DO-215AB), surface-mount gull-wing lead frame with matte tin-plated terminals, RoHS-compliant (E3 suffix), MSL Level 1, 260 °C reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to system ground or low-side reference in unidirectional protection configuration |
| Cathode | Current exit terminal in forward bias; marked with band | Connected to protected line (e.g., CAN_H, LIN, sensor supply) - defines clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced degradation |
| Low-profile DO-215AB package | Enables high-density PCB layouts while maintaining thermal performance via 8 mm × 8 mm pad design |
| Fast response time | Sub-nanosecond clamping prevents voltage overshoot from damaging sensitive gate oxides |
| MSL Level 1 rating | Eliminates bake-out requirement prior to reflow, reducing manufacturing cost and cycle time |
| AEC-Q101 qualification | Validates robustness for automotive powertrain, body control, and ADAS applications |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails feeding ECUs, lighting modules, and motor drivers from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp positive-going surges above 48 V. Use Value: Limits transient voltage to ≤77.4 V, preventing damage to 60 V-rated MOSFETs and PMICs downstream. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to microcontrollers in factory automation systems. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) TVS on signal line to absorb ESD and inductive coupling without loading precision signal paths. Use Value: Maintains signal fidelity while suppressing >1 kV HBM ESD events per IEC 61000-4-2. |
| Automotive LIN Bus Protection | On-Board Charger Control Circuitry |
Use Scenario: Securing LIN transceiver pins against battery reversal, ESD, and coupled noise in door module and seat control units. IC Role / Device Role / Timing Role: Cathode-to-LIN bus, anode-to-ground configuration provides bidirectional-like protection for low-speed serial bus. Use Value: Clamps transients to 77.4 V while adding <0.5 pF junction capacitance - no data rate degradation at 20 kbps. | Use Scenario: Shielding gate drivers and feedback sensing nodes in 3.3 kW OBC front-end controllers exposed to AC line surges and DC bus transients. IC Role / Device Role / Timing Role: Primary-level TVS on auxiliary 12 V supply rail feeding isolated gate drivers and MCU peripherals. Use Value: Withstands 200 A IFSM surge and dissipates 1500 W peak pulses, enabling compliance with ISO 7637-2 Pulse 5a. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48A-E3/57T | Same VWM (48 V), lower PPPM (400 W), SMA (DO-214AC) package, RθJA = 100 °C/W | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and surge margin requirements |
| SMCJ48A-E3/9AT | Same VWM (48 V), higher PPPM (1500 W), but larger SMC (DO-214AB) package and higher RθJA (85 °C/W) | Requires more PCB area; less suitable for dense automotive modules | Choose only if existing layout accommodates SMC footprint and thermal management allows higher junction rise |
Compared with SMAJ48A-E3/57T and SMCJ48A-E3/9AT, the SMCG48A-E3/9AT delivers identical surge rating in a smaller, AEC-Q101-qualified package with superior thermal performance - making it optimal for space-constrained, high-reliability automotive designs where board area and qualification are critical.
Availability
SMCG48A-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and on-board charger control circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMCG48A-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, rectifiers, and protection devices with emphasis on reliability, efficiency, and automotive-grade validation.
The SMCG series was developed specifically for high-energy transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, low-profile packaging, and precise clamping performance.
FAQ
What is the clamping voltage of the SMCG48A-E3/9AT under peak pulse conditions?
The SMCG48A-E3/9AT has a maximum clamping voltage (VC) of 77.4 V when subjected to its rated peak pulse current (IPPM = 19.4 A) under the standard 10/1000 µs waveform. This value is measured at the device terminals with specified mounting conditions (0.31" × 0.31" copper pads), and defines the upper voltage limit imposed on protected circuitry during surge events.
Is the SMCG48A-E3/9AT suitable for automotive applications?
Yes, the SMCG48A-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use. Its construction - including glass-passivated junction, MSL Level 1 moisture sensitivity, and operation from –55 °C to +150 °C - meets requirements for engine bay, body control, and ADAS subsystems. The E3 suffix confirms RoHS compliance for industrial and automotive grade deployment.
How does the SMCG48A-E3/9AT differ from the SMCG48CA variant?
The SMCG48A-E3/9AT is unidirectional (cathode-banded), while SMCG48CA is bidirectional with symmetrical breakdown in both polarities. The SMCG48A-E3/9AT has a single VBR range (53.3–58.9 V), whereas SMCG48CA exhibits matched VBR in both directions. Their clamping voltages and surge ratings are identical, but polarity and circuit integration differ fundamentally.
What is the recommended PCB pad layout for optimal thermal performance of the SMCG48A-E3/9AT?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad for each terminal to achieve rated PPPM and thermal resistance (RθJA = 75 °C/W). Use solid internal ground planes and thermal vias beneath pads to enhance heat dissipation - deviation reduces surge capability and increases junction temperature during repetitive events.
Does the SMCG48A-E3/9AT have a specified junction capacitance value?
No junction capacitance (CJ) value is published for the SMCG48A-E3/9AT in the official Vishay datasheet (Document Number: 88457). While typical CJ for similar SMCG unidirectional devices falls below 100 pF at zero bias, this parameter is not characterized or guaranteed for SMCG48A-E3/9AT - designers requiring precise capacitive loading should verify with bench measurement or select a variant with published CJ data.
SMCG48A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCG48A-E3/9AT FAQ
1.How can I place an order for SMCG48A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG48A-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 SMCG48A-E3/9AT reliable?
The price and inventory of SMCG48A-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 SMCG48A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG48A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG48A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG48A-E3/9AT?
SMCG48A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG48A-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 SMCG48A-E3/9AT?
For technical support, including SMCG48A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG48A-E3/9AT requirements.
6.How does Aetrix verify that SMCG48A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG48A-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 SMCG48A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG48A-E3/9AT?
All SMCG48A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG48A-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 SMCG48A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG48A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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