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Vishay General Semiconductor - Diodes Division SMCG48CA-E3/57T
- Part No.:
- SMCG48CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG48CA-E3/57T.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,819
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Product details
Overview
SMCG48CA-E3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) surface-mount package, designed for high-energy surge protection on signal and power lines. It features a 48 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), clamping voltage of 77.4 V at 19.4 A, AEC-Q101 qualification, and MSL Level 1 moisture sensitivity - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMCG48CA-E3/57T datasheet, SMCG48CA-E3/57T pinout, SMCG48CA-E3/57T application, or SMCG48CA-E3/57T equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal resistance (RθJA = 75 °C/W), RoHS-compliant E3 termination, and AEC-Q101 qualification status - all critical for automotive-grade ESD/surge design validation.
Technical Context
The SMCG48CA-E3/57T operates as a bidirectional avalanche diode with symmetrical breakdown characteristics: minimum VBR = 53.3 V and maximum VBR = 58.9 V at 1 mA test current. Its clamping action begins at VWM = 48 V and limits transient voltages to ≤77.4 V under 10/1000 µs waveform conditions.
Thermally, it sustains 6.5 W power dissipation at TA = 50 °C with RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The device uses glass-passivated junction technology and meets UL 94 V-0 flammability requirements in its SMCG molded package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe working range for protected circuitry. |
| VBR min / max | 53.3 V / 58.9 V at IT = 1 mA - Confirmed bidirectional breakdown threshold; ensures symmetrical overvoltage triggering in both polarities. |
| VC @ IPPM | 77.4 V at 19.4 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs or MOSFETs. |
| PPPM | 1500 W - Peak pulse power handling capability; supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω). |
| ID @ VWM | 1.0 µA - Reverse leakage at stand-off voltage; low value minimizes standby power loss and avoids false triggering. |
| TJ max | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress-test standard; required for engine control, ADAS sensor, and body electronics applications. |
Pinout & Package
Package: SMCG (DO-215AB) - low-profile, surface-mount plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0; no polarity marking for bidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical avalanche junction; conducts during positive transients relative to cathode reference. |
| Cathode | Transient current entry (negative half-cycle) | Second terminal of symmetrical junction; conducts during negative transients - functionally identical to anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC performance in both directions - eliminates need for polarity-aware layout in differential or AC-coupled lines. |
| AEC-Q101 qualification | Validated reliability for automotive use including temperature cycling, HTRB, and ESD testing - required for Tier-1 supplier BOMs. |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR ≈ 24 V) versus competing TVS devices - reduces voltage overshoot on sensitive 3.3 V/5 V logic rails. |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60 % RH - allows direct placement without baking or dry-pack handling in SMT lines. |
| Glass-passivated junction | Stable breakdown characteristics over lifetime and temperature - prevents parameter drift in harsh industrial environments. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog front-ends from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal pair or supply rail to limit transient excursions below IC absolute maximum ratings. Use Value: Withstands 1500 W surges while clamping to 77.4 V - preserves integrity of 48 V-rated automotive microcontrollers and signal conditioners. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) shunt protector that diverts surge energy away from precision ADCs and op-amps. Use Value: 1.0 µA leakage at 48 V ensures minimal impact on loop accuracy; AEC-Q101 grade supports extended industrial temperature operation. |
| Telecom Line Card Protection | Consumer Power Adapter ESD |
Use Scenario: Secondary-side surge suppression on Ethernet PHY power rails and data lines in enterprise switch line cards. IC Role / Device Role / Timing Role: Standoff-clamp TVS deployed adjacent to PoE injectors and magnetics to absorb induced lightning surges. Use Value: DO-215AB footprint enables dense layout; 75 °C/W RθJA supports thermal management in confined card-edge locations. |
Use Scenario: Input-stage transient protection in USB-C PD adapters and wireless charging base stations subjected to user-handling ESD events. IC Role / Device Role / Timing Role: First-line defense against contact discharge (±8 kV) and air discharge (±15 kV) per IEC 61000-4-2. Use Value: 77.4 V clamping protects 65 V-rated GaN FETs and secondary-side controllers without derating margin loss. |
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 bidirectional configuration, but lower PPPM (400 W); SMA (DO-214AC) package with higher RθJA (110 °C/W). | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load dump where 1500 W is required. | Select SMAJ48CA only for cost-sensitive consumer applications with <500 W surge exposure and relaxed thermal constraints. |
| SMBJ48CA | Same VWM and bidirectional design; PPPM = 600 W; SMB (DO-214AA) package; RθJA = 90 °C/W; not AEC-Q101 qualified. | Acceptable for industrial controls but excluded from automotive BOMs due to lack of AEC-Q101 validation and reduced surge margin. | Choose SMBJ48CA for non-automotive embedded systems needing moderate surge headroom and legacy SMB footprint compatibility. |
Compared with SMAJ48CA and SMBJ48CA, the SMCG48CA-E3/57T delivers 2.5× and 2.5× higher peak pulse power respectively, AEC-Q101 qualification for automotive use, and superior thermal performance (RθJA = 75 °C/W) - making it the only option among the three validated for under-hood deployment and Level 4 surge immunity.
Availability
SMCG48CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC analog input conditioning, and telecom line card surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG48CA-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, automotive qualification, and high-volume manufacturability.
The SMCG series targets high-energy transient suppression in space-constrained, thermally demanding applications - engineered specifically for AEC-Q101 compliance and robust performance in automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of the SMCG48CA-E3/57T under a 10/1000 µs surge?
The SMCG48CA-E3/57T clamps to a maximum of 77.4 V at 19.4 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and reflects worst-case voltage seen by downstream circuitry during standardized surge events - critical for ensuring protected ICs remain within absolute maximum ratings. The SMCG48CA-E3/57T achieves this with low incremental resistance inherent to its glass-passivated junction structure.
Is the SMCG48CA-E3/57T suitable for automotive applications?
Yes, the SMCG48CA-E3/57T is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensor modules, and body electronics. Its construction meets MSL Level 1, operates from −55 °C to +150 °C, and withstands load dump and ISO 7637-2 pulses. The SMCG48CA-E3/57T is listed in Vishay's automotive-grade product portfolio with full qualification documentation available upon request.
Does the SMCG48CA-E3/57T have polarity markings on the package?
No, the SMCG48CA-E3/57T does not feature polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMCG48A), the CA suffix indicates symmetrical avalanche behavior - both terminals serve identically as anode/cathode depending on transient polarity. This eliminates orientation concerns during automated placement and simplifies PCB layout for differential or AC-coupled signals.
What is the thermal resistance of the SMCG48CA-E3/57T, and how does it affect board layout?
The SMCG48CA-E3/57T 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. This value assumes the recommended pad layout from Vishay's datasheet (Document Number 88457). To maintain safe junction temperatures, designers must replicate this copper area - reducing pad size increases RθJA and risks thermal runaway during repeated surge events. The SMCG48CA-E3/57T's low RθJA enables compact placement near protected ICs without external heatsinking.
How does the SMCG48CA-E3/57T differ from the unidirectional SMCG48A variant?
The SMCG48CA-E3/57T is bidirectional with symmetrical breakdown and clamping in both polarities, while the SMCG48A is unidirectional and conducts only in reverse bias (cathode-positive). The SMCG48CA-E3/57T has no band marking, whereas SMCG48A uses a cathode band. Electrically, SMCG48CA-E3/57T exhibits identical VBR min/max (53.3 V / 58.9 V) and VC (77.4 V), but supports applications like AC signal lines or differential buses where polarity reversal occurs - a capability the SMCG48A lacks.
SMCG48CA-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:
- -
- 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-E3/57T FAQ
1.How can I place an order for SMCG48CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG48CA-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 SMCG48CA-E3/57T reliable?
The price and inventory of SMCG48CA-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 SMCG48CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG48CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG48CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG48CA-E3/57T?
SMCG48CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG48CA-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 SMCG48CA-E3/57T?
For technical support, including SMCG48CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG48CA-E3/57T requirements.
6.How does Aetrix verify that SMCG48CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG48CA-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 SMCG48CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG48CA-E3/57T?
All SMCG48CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG48CA-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 SMCG48CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCG48CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG48CA-E3/57T Tags
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