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Vishay General Semiconductor - Diodes Division SMCG45CAHE3/57T
- Part No.:
- SMCG45CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG45CAHE3/57T.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,292
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Product details
Overview
SMCG45CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 45 V standoff voltage (VWM), 50.0–55.3 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), clamping voltage of 72.7 V at 20.6 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMCG45CAHE3/57T datasheet, SMCG45CAHE3/57T pinout, SMCG45CAHE3/57T application, or SMCG45CAHE3/57T equivalent, this device is selected for high-reliability transient suppression on signal lines, power rails, and sensor interfaces where low clamping voltage, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (50.0 V / 55.3 V), ID ≤ 1.0 µA at VWM, and VC = 72.7 V under 10/1000 µs surge conditions. Its glass-passivated junction ensures stable leakage and long-term reliability under repeated transients.
The SMCG45CAHE3/57T uses a DO-215AB surface-mount package with matte tin-plated leads, rated for 260 °C peak reflow (J-STD-020 MSL Level 1), and achieves RθJA = 75 °C/W - enabling effective thermal management on standard 8.0 mm × 8.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 50.0 V / 55.3 V at IT = 1 mA - tight breakdown tolerance ensures predictable turn-on during transients |
| VC @ IPPM | 72.7 V at 20.6 A - low clamping voltage protects downstream ICs with 3.3 V or 5 V I/O rails |
| PPPM | 1500 W (10/1000 µs) - handles high-energy surges from inductive switching or ESD events |
| ID @ VWM | ≤1.0 µA - minimal leakage preserves signal integrity and battery life in always-on circuits |
| TJ max | +150 °C - supports operation in under-hood automotive environments and industrial enclosures |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, gull-wing leaded case with 0.220–0.245 inch body length, 0.115–0.125 inch width, and 0.024–0.040 inch height. Matte tin-plated terminals meet J-STD-002 solderability and JESD22-B102 whisker resistance Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Acts as cathode during positive transients; no polarity marking on device body |
| Cathode | Transient current exit (bidirectional) | Acts as anode during negative transients; symmetrical conduction enables dual-polarity protection |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without preconditioning |
| Glass passivated junction | Ensures stable VBR and low leakage over 10+ years in harsh thermal/humidity environments |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS sensor interfaces |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver I/O pins against load dump and ESD in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to clamp ±100 V transients before reaching PHY. Use Value: Clamps to 72.7 V within nanoseconds, preserving transceiver functionality during ISO 16750-2 load dump tests. |
Use Scenario: Shielding RS-485/CAN FD differential pairs in factory automation PLCs exposed to motor drive noise. IC Role / Device Role / Timing Role: Common-mode TVS pair (one per line) suppressing common-mode surges while maintaining signal integrity. Use Value: 1.0 µA leakage at 45 V avoids bias current errors in precision termination networks. |
| Consumer USB-C Port Protection | Telecom Power Supply Input |
|
Use Scenario: Safeguarding USB-C CC and VCONN lines against hot-plug ESD and cable-induced surges. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed adjacent to port connector to minimize stub length. Use Value: 72.7 V clamping prevents damage to USB PD controllers rated for 5 V operation. |
Use Scenario: Front-end protection of 48 V telecom DC-DC converters against lightning-induced surges on input bus. IC Role / Device Role / Timing Role: Primary TVS on main input rail, coordinated with upstream fuse and MOV for staged energy handling. Use Value: 1500 W PPPM rating absorbs 10/1000 µs surges up to 20.6 A without degradation. |
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), lower PPPM (400 W), SMA package (DO-214AC), RθJA = 110 °C/W | Limited to lower-energy transients; less suitable for automotive load dump | Select when cost sensitivity outweighs surge margin and board space allows larger pad layout |
| SMCJ45CA | Same VWM (45 V), higher PPPM (1500 W), SMC package (DO-214AB), RθJA = 60 °C/W | Requires larger PCB footprint; better thermal performance but not AEC-Q101 qualified | Choose for industrial power supplies needing higher thermal derating margin, not automotive |
Compared with SMAJ45CA and SMCJ45CA, the SMCG45CAHE3/57T uniquely combines AEC-Q101 qualification, DO-215AB compactness, and 1500 W surge capability - making it optimal for space-constrained automotive ECUs requiring certified reliability.
Availability
SMCG45CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and telecom power supply inputs requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for SMCG45CAHE3/57T 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 and automotive-grade validation.
The SMCG series was developed specifically for high-surge, space-constrained transient protection in automotive and industrial systems - prioritizing AEC-Q101 compliance, low clamping, and MSL Level 1 manufacturability.
FAQ
What is the clamping voltage of the SMCG45CAHE3/57T under standard surge conditions?
The SMCG45CAHE3/57T has a maximum clamping voltage (VC) of 72.7 V at 20.6 A peak pulse current (IPPM), measured using the industry-standard 10/1000 µs waveform. This value ensures reliable protection of 48 V-rated components and safeguards 3.3 V/5 V logic interfaces when used with appropriate series impedance.
Is the SMCG45CAHE3/57T suitable for automotive applications?
Yes, the SMCG45CAHE3/57T is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and validated performance across -55 °C to +150 °C operating range - meeting requirements for body electronics, ADAS sensors, and infotainment power domains.
Does the SMCG45CAHE3/57T have polarity markings on the package?
No, the SMCG45CAHE3/57T is a bidirectional TVS and carries no polarity marking on the device body. Unlike unidirectional variants (e.g., SMCG45A), it functions identically in both directions - eliminating orientation concerns during automated placement and simplifying PCB layout.
What is the thermal resistance of the SMCG45CAHE3/57T in standard mounting conditions?
The SMCG45CAHE3/57T 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 standard FR-4 PCB with 1 oz copper and is critical for calculating safe power derating above 25 °C ambient temperature.
How does the SMCG45CAHE3/57T differ from the unidirectional SMCG45AHE3/57T?
The SMCG45CAHE3/57T is bidirectional with symmetrical breakdown and clamping behavior in both polarities, while the SMCG45AHE3/57T is unidirectional and features a cathode band marking. Both share identical VWM (45 V), PPPM (1500 W), and package (DO-215AB), but only the 'CA' version supports AC-coupled or floating-line protection without external polarity management.
SMCG45CAHE3/57T 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG45CAHE3/57T FAQ
1.How can I place an order for SMCG45CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG45CAHE3/57T 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 SMCG45CAHE3/57T reliable?
The price and inventory of SMCG45CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG45CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG45CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG45CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG45CAHE3/57T?
SMCG45CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG45CAHE3/57T 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 SMCG45CAHE3/57T?
For technical support, including SMCG45CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG45CAHE3/57T requirements.
6.How does Aetrix verify that SMCG45CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG45CAHE3/57T 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 SMCG45CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG45CAHE3/57T?
All SMCG45CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG45CAHE3/57T, 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 SMCG45CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCG45CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG45CAHE3/57T Tags
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