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Vishay General Semiconductor - Diodes Division SMCG48A-E3/57T
- Part No.:
- SMCG48A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG48A-E3/57T.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:603
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Product details
Overview
SMCG48A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), 19.4 A peak pulse current (IPPM), and clamps to 77.4 V at rated surge current - ideal for automotive power line and industrial sensor interface protection.
For engineers reviewing the SMCG48A-E3/57T datasheet, SMCG48A-E3/57T pinout, SMCG48A-E3/57T application, or SMCG48A-E3/57T equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), polarity marking convention, and real-world use cases in automotive ECUs and industrial I/O modules.
Technical Context
The SMCG48A-E3/57T operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to suppress transients induced by inductive load switching or ESD events. Its bidirectional counterpart is SMCG48CA, but SMCG48A-E3/57T is strictly unidirectional with cathode band marking.
Rated for TJ = –55 °C to +150 °C, it meets J-STD-020 MSL Level 1 (260 °C peak reflow), supports 200 A non-repetitive forward surge (IFSM), and exhibits 1.0 μA max reverse leakage at VWM - enabling reliable operation in harsh automotive under-hood environments and industrial control cabinets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - maximum continuous reverse operating voltage before clamping begins; defines safe working range for 48 V nominal systems. |
| VBR min/max | 53.3 V / 58.9 V at IT = 1 mA - tight breakdown window ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 77.4 V - clamping voltage at 19.4 A (10/1000 µs waveform); limits downstream voltage stress to <1.6× VWM. |
| PPPM | 1500 W - peak transient energy handling capacity on standard 8 mm × 8 mm copper pads; suitable for ISO 7637-2 Pulse 1/2a/5a compliance. |
| ID @ VWM | 1.0 μA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| RθJA | 75 °C/W - thermal resistance enables stable operation up to +150 °C junction temperature with minimal heatsinking. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMCG (DO-215AB) - low-profile, surface-mount gull-wing package with matte tin-plated leads, UL 94 V-0 molding compound, and polarity indicated by cathode band on the case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference. | Provides return path for surge current during clamping; must be routed with low-inductance trace to ground plane. |
| Cathode | Current exit terminal in forward bias; marked with band; connects to protected line (e.g., 48 V rail). | Defines unidirectional polarity - reverse-biased during normal operation; avalanches into conduction when line voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensors requiring long-term reliability under thermal cycling and vibration. |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced degradation - critical for outdoor and under-hood deployments. |
| MSL Level 1 rating | Enables single-reflow assembly without baking; compatible with standard SMT lines using 260 °C peak profile. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (e.g., ISO 16750-2 load dump), improving clamping precision and system margin. |
| 1500 W PPPM (10/1000 µs) | Supports robust protection against severe automotive transients like ISO 7637-2 Pulse 5a (100 V, 400 ms), reducing need for cascaded protection stages. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and alternator ripple in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48 V rail and chassis ground to clamp surges above 53.3 V. Use Value: Limits peak voltage to 77.4 V during 1500 W transients, preventing damage to DC-DC converters and microcontrollers rated for 80 V absolute max. |
Use Scenario: Shielding analog input channels of PLC I/O modules from field-wiring induced transients in factory automation. IC Role / Device Role / Timing Role: Front-end TVS on 24/48 V sensor supply lines to absorb ESD and inductive kickback before signal conditioning circuitry. Use Value: 1.0 μA leakage at 48 V avoids loading high-impedance sensor bridges; 75 °C/W RθJA allows operation in sealed enclosures up to +85 °C ambient. |
| Telecom DC Power Feeds | Motor Drive Control Signal Lines |
Use Scenario: Safeguarding PoE++ (IEEE 802.3bt Type 4) 54 V power inputs in remote radio units and base station controllers. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input stage, coordinated with upstream fuses and secondary TVS arrays. Use Value: 19.4 A IPPM handles repetitive surges from lightning-induced coupling; RoHS-compliant E3 suffix meets telecom environmental compliance requirements. |
Use Scenario: Protecting isolated gate driver enable signals in 48 V BLDC motor inverters from cross-talk and ground bounce. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on logic-level control lines referenced to 48 V bus ground. Use Value: Fast <1 ns response prevents latch-up in CMOS drivers; cathode-band polarity ensures correct orientation during automated placement on dense motor control PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48A-E3/57T | Same VWM (48 V) and VBR range, but lower PPPM (400 W) and smaller SMA (DO-214AC) package; RθJA = 110 °C/W. | Lower surge capability suits consumer-grade 48 V supplies; not AEC-Q101 qualified. | Select when cost or board space is prioritized over automotive-grade surge margin and thermal performance. |
| SMCJ48A-E3/57T | Same VWM and VBR, higher PPPM (1500 W), identical SMCG (DO-215AB) package, but no AEC-Q101 qualification listed in official documentation. | Matches mechanical and electrical specs but lacks automotive reliability validation; used in industrial UPS and solar charge controllers. | Choose when AEC-Q101 is not required and full 1500 W rating is needed in non-automotive settings. |
Compared with SMAJ48A-E3/57T and SMCJ48A-E3/57T, the SMCG48A-E3/57T uniquely combines AEC-Q101 qualification, 1500 W PPPM, and DO-215AB thermal performance - making it the only option validated for automotive 48 V systems demanding both high-energy clamping and long-term field reliability.
Availability
SMCG48A-E3/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom DC power feed applications requiring stable component supply across multi-year production cycles.
Supply support for SMCG48A-E3/57T 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 application-specific optimization.
The SMCG series was developed specifically for high-energy transient suppression in automotive and industrial environments where AEC-Q101 compliance, low thermal resistance, and precise clamping are mandatory design requirements.
FAQ
What is the polarity configuration of SMCG48A-E3/57T?
The SMCG48A-E3/57T is a unidirectional TVS diode with cathode indicated by a visible band on the SMCG (DO-215AB) package. During normal operation, the cathode connects to the protected line (e.g., 48 V rail) and the anode to ground. This configuration ensures conduction only when the line voltage exceeds the breakdown threshold in reverse bias - a key distinction from bidirectional variants like SMCG48CA.
Is SMCG48A-E3/57T qualified for automotive applications?
Yes, SMCG48A-E3/57T carries AEC-Q101 qualification, confirmed in Vishay's official documentation (Document Number: 88457, Revision: 09-Jan-2024). It has passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D, making it suitable for under-hood and chassis-mounted automotive electronics such as 48 V battery management and ADAS power domains.
What is the maximum clamping voltage of SMCG48A-E3/57T under surge conditions?
The SMCG48A-E3/57T clamps to a maximum of 77.4 V at its rated peak pulse current (IPPM = 19.4 A) under the standardized 10/1000 µs waveform. This value is measured with the device mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per JEDEC standards and represents the upper voltage limit imposed on protected circuitry during worst-case transient events.
Does SMCG48A-E3/57T meet RoHS and halogen-free requirements?
Yes, the "E3" suffix in SMCG48A-E3/57T denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads. It meets JESD 201 Class 2 whisker resistance and UL 94 V-0 flammability. While not halogen-free (that requires "M3" suffix), the E3 variant is fully compliant with EU RoHS Directive 2011/65/EU and China RoHS II.
What is the thermal resistance of SMCG48A-E3/57T, and how does it affect layout?
The SMCG48A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on standard 8 mm × 8 mm copper pads. This value assumes optimal PCB layout - designers must allocate sufficient copper area on both top and bottom layers, use multiple thermal vias under the pads, and avoid routing heat-sensitive components nearby to maintain junction temperature below 150 °C during repeated surge events.
SMCG48A-E3/57T 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):
- 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-E3/57T FAQ
1.How can I place an order for SMCG48A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG48A-E3/57T 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 SMCG48A-E3/57T reliable?
The price and inventory of SMCG48A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG48A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG48A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG48A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG48A-E3/57T?
SMCG48A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG48A-E3/57T 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 SMCG48A-E3/57T?
For technical support, including SMCG48A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG48A-E3/57T requirements.
6.How does Aetrix verify that SMCG48A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG48A-E3/57T 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 SMCG48A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG48A-E3/57T?
All SMCG48A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG48A-E3/57T, 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 SMCG48A-E3/57T part is unused and in its original packaging.
Return procedure for SMCG48A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG48A-E3/57T Tags
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