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Vishay General Semiconductor - Diodes Division SMCG18AHE3/57T
- Part No.:
- SMCG18AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG18AHE3/57T.pdf
- Description:
- TVS DIODE 18VWM 29.2VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,626
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Product details
Overview
SMCG18AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-215AB (SMCG) package, with 18 V stand-off voltage (VWM), 20.0–22.1 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and 51.4 A peak pulse current (IPPM) under 10/1000 µs waveform. It protects MOSFETs and signal lines in automotive powertrain control modules against inductive switching transients.
For engineers reviewing the SMCG18AHE3/57T datasheet, SMCG18AHE3/57T pinout, SMCG18AHE3/57T application, or SMCG18AHE3/57T equivalent, key selection criteria include clamping voltage (VC = 29.2 V at IPPM), AEC-Q101 qualification, RoHS compliance, and thermal resistance (RθJA = 75 °C/W) for board-level thermal design validation.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, designed to shunt transient energy above VBR while maintaining low leakage (<1.0 µA at VWM = 18 V). Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns).
The device uses a low-inductance DO-215AB surface-mount package optimized for automated placement and meets MSL level 1 per J-STD-020 (peak reflow 260 °C). Its 1500 W PPPM rating applies to 10/1000 µs waveform with derating above TA = 25 °C per published curves.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 20.0 V / 22.1 V at IT = 1.0 mA - Confirmed breakdown threshold range for production screening |
| VC @ IPPM | 29.2 V at IPPM = 51.4 A - Clamped voltage during worst-case 10/1000 µs surge, limiting downstream stress |
| PPPM | 1500 W - Peak transient power handling capability under standard IEC 61000-4-5 waveform |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on 8.0 mm × 8.0 mm copper pads, critical for thermal margin calculation |
| TJ max | +150 °C - Maximum allowable junction temperature, enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: DO-215AB (SMCG) - Surface-mount gull-wing leaded case with matte tin-plated terminals, 0.220–0.245 inch body length, 0.115–0.125 inch width, and 0.024–0.040 inch height. Complies with UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to protected line (e.g., 12 V rail); cathode band identifies opposite end |
| Cathode | Current exit terminal in forward bias; clamping node in reverse bias | Connected to ground reference; carries full surge current during transient events |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS subsystems |
| Low incremental surge resistance | Minimizes VC rise under high di/dt, improving protection margin for sensitive ICs |
| MSL Level 1 rating | Enables direct placement into high-temperature reflow without pre-baking |
| RoHS-compliant HE3 suffix | Meets industrial and automotive environmental compliance requirements without halogen restriction |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting microcontroller I/O and gate drivers from load-dump and inductive kickback in engine control units (ECUs). IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between 12 V supply rail and chassis ground. Use Value: Limits transient voltage to ≤29.2 V, preventing latch-up or oxide damage in 3.3 V/5 V logic interfaces downstream. | Use Scenario: Safeguarding PLC analog input channels connected to 24 V DC field sensors subject to relay contact bounce. IC Role / Device Role / Timing Role: Standoff protection element on signal conditioning front-end, upstream of op-amp buffers. Use Value: Maintains <1.0 µA leakage at 18 V, preserving measurement accuracy while clamping surges up to 1500 W. |
| Telecom Base Station Power Rails | Automotive Body Control Module (BCM) |
Use Scenario: Shielding 48 V intermediate bus converters from lightning-induced surges in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC output, coordinated with upstream MOVs. Use Value: Delivers 51.4 A IPPM capacity with 75 °C/W thermal resistance, enabling compact heatsink-free layout. | Use Scenario: Protecting LIN bus transceivers and LED driver ICs from battery reverse-connection and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS on VBAT-supplied rails feeding CAN/LIN physical layers. Use Value: AEC-Q101 qualification ensures functional safety compliance for ISO 26262 ASIL-B subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-E3/57T | DO-214AC (SMA) package; lower PPPM (400 W); higher RθJA (110 °C/W) | Not AEC-Q101 qualified; suitable for commercial-grade consumer electronics only | Select when cost sensitivity outweighs automotive qualification and power handling needs |
| SMCJ18AHE3/57T | DO-214AB (SMC) package; same VWM/VBR/PPPM specs; larger footprint (7.11 mm × 6.22 mm vs. 7.11 mm × 5.59 mm) | Same AEC-Q101 and thermal performance; requires PCB layout revision due to 0.63 mm wider body | Choose for legacy SMC-compatible designs where DO-215AB footprint change is not feasible |
Compared with SMAJ18A-E3/57T and SMCJ18AHE3/57T, the SMCG18AHE3/57T delivers identical electrical protection performance in a smaller, AEC-Q101-qualified DO-215AB package-enabling higher board density and automotive system compliance without thermal or layout compromise.
Availability
SMCG18AHE3/57T is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive inputs, and telecom base station power rails requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for SMCG18AHE3/57T 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCG series is engineered for high-power transient suppression in space-constrained automotive and industrial systems, combining AEC-Q101 qualification, low-profile packaging, and robust 1500 W surge capability.
FAQ
What is the clamping voltage of the SMCG18AHE3/57T under maximum surge conditions?
The SMCG18AHE3/57T has a maximum clamping voltage (VC) of 29.2 V at its rated peak pulse current (IPPM = 51.4 A) under the standard 10/1000 µs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during transient events.
Is the SMCG18AHE3/57T suitable for automotive applications?
Yes, the SMCG18AHE3/57T is AEC-Q101 qualified and specifically designed for automotive use. Its construction-including glass-passivated junction, MSL Level 1 reflow compatibility, and operation from –55 °C to +150 °C-meets stringent requirements for engine control units, body control modules, and ADAS power domains. The HE3 suffix confirms RoHS compliance and automotive qualification.
What does the "HE3" suffix indicate in SMCG18AHE3/57T?
The "HE3" suffix in SMCG18AHE3/57T denotes RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads. It distinguishes this variant from industrial-grade E3 (RoHS, non-automotive) and HM3 (halogen-free + AEC-Q101) versions. The HE3 marking ensures traceability to Vishay's automotive qualification program and material compliance documentation.
How does the DO-215AB package of SMCG18AHE3/57T compare thermally to DO-214AB (SMC)?
The SMCG18AHE3/57T in DO-215AB exhibits RθJA = 75 °C/W on 8.0 mm × 8.0 mm pads, matching the thermal performance of many DO-214AB (SMC) devices despite its smaller footprint. This is achieved via optimized internal thermal path design and low-resistance terminations, allowing equivalent power dissipation without requiring larger PCB copper areas than SMC-packaged alternatives.
Can SMCG18AHE3/57T be used in bidirectional configurations?
No, SMCG18AHE3/57T is a unidirectional TVS diode, indicated by the "A" (not "CA") suffix and cathode-band marking. For bidirectional operation, Vishay specifies variants like SMCG18CA. Using SMCG18AHE3/57T in reverse-biased AC signal paths would result in forward conduction and failure; always verify polarity alignment in schematic and layout for SMCG18AHE3/57T.
SMCG18AHE3/57T 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):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 51.4A
- 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)
SMCG18AHE3/57T FAQ
1.How can I place an order for SMCG18AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG18AHE3/57T 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 SMCG18AHE3/57T reliable?
The price and inventory of SMCG18AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG18AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG18AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG18AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG18AHE3/57T?
SMCG18AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG18AHE3/57T 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 SMCG18AHE3/57T?
For technical support, including SMCG18AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG18AHE3/57T requirements.
6.How does Aetrix verify that SMCG18AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG18AHE3/57T 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 SMCG18AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG18AHE3/57T?
All SMCG18AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG18AHE3/57T, 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 SMCG18AHE3/57T part is unused and in its original packaging.
Return procedure for SMCG18AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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