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Vishay General Semiconductor - Diodes Division SMCG75CA-E3/57T
- Part No.:
- SMCG75CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG75CA-E3/57T.pdf
- Description:
- TVS DIODE 75VWM 121VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,896
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Product details
Overview
SMCG75CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount TransZORB® transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, rated for 75 V standoff voltage (VWM), 121 V maximum clamping voltage (VC) at 12.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM). It provides AEC-Q101 qualification and is used to protect automotive sensor signal lines, industrial I/O ports, and power supply rails against ESD and inductive switching transients.
For engineers reviewing the SMCG75CA-E3/57T datasheet, SMCG75CA-E3/57T pinout, SMCG75CA-E3/57T application, or SMCG75CA-E3/57T equivalent, key selection criteria include bidirectional clamping symmetry, 121 V VC under 10/1000 µs surge, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: during overvoltage events exceeding its breakdown voltage (VBR min = 83.3 V, max = 92.1 V), it transitions from high-impedance to low-impedance state within <1 ns, diverting surge current away from downstream circuitry. Its bidirectional structure enables symmetrical clamping in both polarities without polarity marking.
Thermal performance is defined by RθJA = 75 °C/W (on recommended 8.0 mm × 8.0 mm pads) and RθJL = 15 °C/W, supporting continuous operation up to TJ = 150 °C. The glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and long-term reliability under repeated surge stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe working range for protected line. |
| VBR (min/max) | 83.3 V / 92.1 V - Breakdown occurs within this band at 1.0 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 121 V @ 12.4 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 1500 W - Peak pulse power handling capability; validates robustness against lightning-induced or inductive-switching surges. |
| ID @ VWM | <1.0 µA - Reverse leakage at 75 V; minimizes standby power loss and avoids false triggering in high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature; supports under-hood automotive and industrial environments with minimal derating. |
| MSL Level | Level 1 (per J-STD-020) - No floor life limitation; compatible with standard reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMCG (DO-215AB) - low-profile, gull-wing surface-mount case with matte tin-plated leads; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node for bidirectional conduction path | No polarity marking required; symmetric terminals enable mounting without orientation check during automated placement. |
| Cathode | Current exit terminal in forward bias; identical physical terminal to Anode in bidirectional configuration | Terminal identity is functional only under unidirectional bias; in SMCG75CA-E3/57T, both terminals behave identically during transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HAST, and surge endurance per AEC stress test plan. |
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime; eliminates risk of junction degradation from humidity or contamination. |
| Low incremental surge resistance | Enables tight VC–IPPM relationship (121 V @ 12.4 A); reduces voltage overshoot during fast-rising transients. |
| MSL Level 1 compliance | Eliminates bake-out requirement prior to reflow; supports just-in-time manufacturing and short lead-time production. |
| 1500 W 10/1000 µs rating | Withstands ≥1000 surges at full rating (per Fig. 2 derating curve); suitable for harsh industrial motor drive or solenoid control interfaces. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed directly at connector interface to limit transient voltage before reaching signal conditioning IC. Use Value: Maintains signal integrity by clamping to ≤121 V during 10/1000 µs surges up to 12.4 A, preventing latch-up or gate oxide damage in protected transceivers. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and EMI coupling. IC Role / Device Role / Timing Role: Parallel-connected TVS across 24 V DC input terminals to absorb inductive energy from contactor switching. Use Value: Delivers 1500 W peak power dissipation without degradation, enabling reliable operation in factory automation environments with frequent switching cycles. |
| Telecom Power Supply Clamp | Consumer USB Port ESD Protection |
Use Scenario: Secondary-side overvoltage protection on 48 V telecom power distribution boards subject to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated clamp between +48 V rail and ground, triggered only above 75 V to avoid interference with normal regulation. Use Value: Achieves 121 V clamping at 12.4 A with <1 µA leakage at 75 V, preserving efficiency while meeting GR-1089-CORE surge immunity requirements. |
Use Scenario: Board-level ESD protection for USB 2.0 data lines (D+/D−) in portable audio devices and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed adjacent to USB connector to shunt ±8 kV HBM ESD strikes. Use Value: Symmetric clamping response ensures equal protection for both signal polarities without affecting 480 Mbps data integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75CA | Same VWM (75 V) and PPPM (1500 W), but SMA (DO-214AC) package; higher RθJA (110 °C/W) limits power handling on small pads. | Larger footprint (4.5 mm × 2.7 mm vs. SMCG's 3.8 mm × 2.6 mm); less suitable for dense automotive PCB layouts. | Choose SMAJ75CA only if existing design uses SMA footprint or requires legacy qualification documentation. |
| SMCJ75CA | Higher PPPM (3000 W), same VWM (75 V), but larger SMC (DO-214AB) package; RθJA = 15 °C/W (junction-to-lead) requires thermal pad routing. | Requires 2× PCB area and additional thermal vias; over-specified for 1500 W use cases unless future surge margin is needed. | Prefer SMCJ75CA only when system-level testing confirms need for >1500 W surge margin or extended lifetime under repetitive stress. |
Compared with SMAJ75CA and SMCJ75CA, SMCG75CA-E3/57T delivers identical electrical protection in a smaller, AEC-Q101-qualified package with superior thermal performance on standard SMT pads-making it optimal for space-constrained, high-reliability automotive and industrial edge nodes.
Availability
SMCG75CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power supply protection requiring stable component supply, AEC-Q101 compliance, and MSL Level 1 reflow compatibility.
Supply support for SMCG75CA-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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, precision, and application-specific optimization for automotive, industrial, and computing markets.
The SMCG series was developed specifically for high-power, low-profile transient suppression in space-constrained automotive ECUs and industrial controllers-balancing 1500 W surge capability with MSL Level 1 process compatibility and AEC-Q101 validation.
FAQ
What is the clamping voltage of SMCG75CA-E3/57T at its rated peak pulse current?
The SMCG75CA-E3/57T has a maximum clamping voltage (VC) of 121 V when subjected to its rated peak pulse current (IPPM) of 12.4 A under the standard 10/1000 µs waveform. This value is measured per Figure 3 in Vishay document 88457 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCG75CA-E3/57T maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMCG75CA-E3/57T suitable for automotive applications?
Yes, SMCG75CA-E3/57T is AEC-Q101 qualified and explicitly rated for automotive use per Vishay's qualification report referenced in document 88457. Its construction-including glass-passivated junction, matte tin-plated leads compliant with J-STD-002, and MSL Level 1 rating-meets automotive manufacturing and under-hood environmental requirements. The SMCG75CA-E3/57T is commonly deployed in ADAS sensor modules and body control units where bidirectional transient immunity is critical.
What does the "CA" suffix indicate in SMCG75CA-E3/57T?
The "CA" suffix in SMCG75CA-E3/57T denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression for both positive and negative polarity surges. Unlike unidirectional variants (e.g., SMCG75A), the SMCG75CA-E3/57T has no cathode marking and exhibits identical VBR, VC, and IPPM characteristics in either direction-enabling simplified layout and eliminating polarity verification during assembly.
What is the thermal resistance of SMCG75CA-E3/57T under standard mounting conditions?
Under the standard mounting condition specified in Vishay document 88457-0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal-the SMCG75CA-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W. Its junction-to-lead resistance (RθJL) is 15 °C/W. These values are essential for calculating steady-state power dissipation limits and verifying thermal safety margins in continuous or repetitive surge scenarios involving the SMCG75CA-E3/57T.
How does the SMCG75CA-E3/57T differ from the SMCG75A variant?
The SMCG75CA-E3/57T is bidirectional, while SMCG75A is unidirectional. This means SMCG75CA-E3/57T clamps equally for both polarities and carries no polarity marking, whereas SMCG75A features a cathode band and conducts only in reverse bias. Electrically, SMCG75CA-E3/57T has identical VWM (75 V) and PPPM (1500 W) but differs in test current (IT = 1.0 mA vs. 10 mA for SMCG75A) and maximum ID (1.0 µA vs. 1000 µA). The SMCG75CA-E3/57T is preferred for AC-coupled or differential signal protection where polarity reversal is possible.
SMCG75CA-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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- 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)
SMCG75CA-E3/57T FAQ
1.How can I place an order for SMCG75CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG75CA-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 SMCG75CA-E3/57T reliable?
The price and inventory of SMCG75CA-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 SMCG75CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG75CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG75CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG75CA-E3/57T?
SMCG75CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG75CA-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 SMCG75CA-E3/57T?
For technical support, including SMCG75CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG75CA-E3/57T requirements.
6.How does Aetrix verify that SMCG75CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG75CA-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 SMCG75CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG75CA-E3/57T?
All SMCG75CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG75CA-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 SMCG75CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCG75CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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