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Vishay General Semiconductor - Diodes Division SMCG45CA-E3/57T
- Part No.:
- SMCG45CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG45CA-E3/57T.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,947
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Product details
Overview
SMCG45CA-E3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for high-energy surge protection on signal and power lines. It features a 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), clamping voltage of 72.7 V at 20.6 A, and AEC-Q101 qualification for automotive reliability.
For engineers reviewing the SMCG45CA-E3/57T datasheet, SMCG45CA-E3/57T pinout, SMCG45CA-E3/57T application, or SMCG45CA-E3/57T equivalent, this device is selected for robust ESD and lightning surge protection in automotive sensor interfaces, industrial I/O modules, and telecom line drivers where bidirectional clamping, low clamping ratio, and MSL Level 1 solderability are critical.
Technical Context
The SMCG45CA-E3/57T operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at VWM), while the DO-215AB package supports automated SMT placement and meets UL 94 V-0 flammability requirements.
It delivers 1500 W peak pulse power under the standardized 10/1000 µs waveform, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W, allowing effective heat dissipation on 8.0 mm × 8.0 mm copper pads. The device is rated for -55 °C to +150 °C operating junction temperature and qualified per AEC-Q101 for automotive under-hood and chassis applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 36 V nominal automotive systems. |
| VBR min/max | 50.0 / 55.3 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on during transients. |
| VC @ IPPM | 72.7 V at 20.6 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to safe levels. |
| PPPM | 1500 W - Peak surge energy handling capability; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) compliance with margin. |
| ID @ VWM | <1.0 µA - Ultra-low reverse leakage at rated stand-off; preserves signal integrity in high-impedance sensor circuits. |
| TJ max | +150 °C - Extended junction temperature rating enables use in engine control units and powertrain modules. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, gull-wing leaded package with 2 terminals, 7.11 mm × 6.60 mm footprint, 1.47 mm height, UL 94 V-0 molding compound, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional configuration | Symmetrical terminal - no polarity marking; both ends function identically for transient suppression in either direction. |
| Cathode | Current exit point in forward bias; common terminal in bidirectional configuration | Identical to Anode in bidirectional operation; no band marking distinguishes terminals - device is electrically symmetric. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses (e.g., CAN, RS-485), and floating sensors without polarity concerns. |
| 1500 W peak pulse power | Withstands severe surges such as ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Combination Wave (4 kV) with design margin. |
| AEC-Q101 qualification | Validated for automotive environments including thermal shock, humidity, and mechanical vibration per JESD22 standards. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture sensitivity handling overhead. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage across temperature and lifetime; reduces parameter drift in harsh conditions. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Module |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp fast transients before they reach signal conditioning circuitry. Use Value: Limits clamped voltage to 72.7 V, safeguarding 48 V-tolerant transceivers and preserving signal fidelity under ISO 16750-2 pulses. | Use Scenario: Shielding programmable logic controller (PLC) digital input channels from inductive kickback and field wiring surges. IC Role / Device Role / Timing Role: Primary surge shunt on 24 V DC input lines, coordinated with upstream fuse and series impedance for coordinated protection. Use Value: 1500 W PPPM rating handles repetitive 100 A/10 ms surges from solenoid switching without degradation. |
| Telecom Line Driver Protection | Consumer Appliance Motor Control Board |
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs in base station backhaul equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS on differential pairs, working with common-mode chokes and primary GDTs for staged protection. Use Value: Symmetrical 72.7 V clamping maintains differential mode integrity and prevents receiver saturation during 10/1000 µs transients. | Use Scenario: Protecting microcontroller GPIOs and gate drivers on washing machine motor control boards from brush-commutator noise and power supply coupling. IC Role / Device Role / Timing Role: Localized TVS at MCU pin level for fast ESD (IEC 61000-4-2 ±8 kV contact) and burst immunity. Use Value: Sub-1 µA leakage at 45 V ensures no measurable impact on 3.3 V logic thresholds or ADC reference stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45CA | Same VWM (45 V) and bidirectional structure, but lower PPPM (400 W) and larger SMA (DO-214AC) package. | Lower surge capacity suits consumer-grade I/O; not recommended for automotive or industrial 4 kV-level threats. | Select SMAJ45CA only when cost sensitivity outweighs surge margin and board space permits larger footprint. |
| 1.5KE45CA | Higher PPPM (1500 W), same VWM, but axial-leaded DO-201AD package - incompatible with SMT assembly. | Requires through-hole assembly and manual rework; unsuitable for high-volume automated production. | Choose 1.5KE45CA only for prototyping or legacy through-hole designs where reflow compatibility is not required. |
Compared with SMAJ45CA and 1.5KE45CA, the SMCG45CA-E3/57T uniquely combines 1500 W surge rating, SMT-compatible DO-215AB packaging, AEC-Q101 qualification, and bidirectional symmetry - making it the preferred choice for automotive and industrial surface-mount surge protection where reliability, manufacturability, and performance must coexist.
Availability
SMCG45CA-E3/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC development, and telecom infrastructure projects requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG45CA-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 is engineered for high-power transient suppression in demanding environments, targeting automotive, industrial, and telecom applications where compact size, AEC-Q101 compliance, and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of the SMCG45CA-E3/57T and how is it measured?
The SMCG45CA-E3/57T has a maximum clamping voltage (VC) of 72.7 V, measured at a peak pulse current (IPPM) of 20.6 A under the standardized 10/1000 µs double-exponential waveform. This value is guaranteed per Vishay's datasheet (Document Number 88457, Rev. 09-Jan-2024) and reflects worst-case device behavior during surge events - critical for verifying downstream IC voltage tolerances in designs using the SMCG45CA-E3/57T.
Is the SMCG45CA-E3/57T suitable for automotive applications?
Yes, the SMCG45CA-E3/57T is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood and chassis applications. Its -55 °C to +150 °C operating temperature range, glass-passivated junction, and validation against thermal cycling, HTRB, and ESD make it appropriate for engine control units, body electronics, and ADAS sensor modules where the SMCG45CA-E3/57T provides certified surge resilience.
Does the SMCG45CA-E3/57T have polarity markings, and how is it mounted?
No, the SMCG45CA-E3/57T is a bidirectional device and carries no cathode band or polarity marking. Both terminals are functionally identical, and orientation during placement has no electrical effect. It mounts in the DO-215AB (SMCG) gull-wing package on standard SMT pads per Vishay's recommended 8.0 mm × 8.0 mm copper land pattern - ensuring optimal thermal and surge performance for the SMCG45CA-E3/57T.
What is the leakage current specification for the SMCG45CA-E3/57T at its stand-off voltage?
At its 45 V stand-off voltage (VWM), the SMCG45CA-E3/57T exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C, per the Vishay datasheet. This ultra-low leakage preserves signal integrity in high-impedance circuits such as sensor front-ends and precision analog interfaces - a key design advantage distinguishing the SMCG45CA-E3/57T from higher-leakage alternatives.
Can the SMCG45CA-E3/57T replace unidirectional TVS diodes in existing designs?
The SMCG45CA-E3/57T can replace unidirectional TVS diodes only if the circuit topology supports bidirectional clamping - e.g., AC-coupled lines, differential buses, or floating references. It must not be used where DC bias polarity is critical (e.g., single-supply rail clamping). Designers must verify layout symmetry and absence of DC blocking capacitors before substituting the SMCG45CA-E3/57T for unidirectional parts.
SMCG45CA-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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 20.6A
- 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)
SMCG45CA-E3/57T FAQ
1.How can I place an order for SMCG45CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG45CA-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 SMCG45CA-E3/57T reliable?
The price and inventory of SMCG45CA-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 SMCG45CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG45CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG45CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG45CA-E3/57T?
SMCG45CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG45CA-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 SMCG45CA-E3/57T?
For technical support, including SMCG45CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG45CA-E3/57T requirements.
6.How does Aetrix verify that SMCG45CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG45CA-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 SMCG45CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG45CA-E3/57T?
All SMCG45CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG45CA-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 SMCG45CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCG45CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG45CA-E3/57T Tags
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