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Vishay General Semiconductor - Diodes Division 1.5SMC20AHE3/9AT
- Part No.:
- 1.5SMC20AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20AHE3/9AT.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,132
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Product details
Overview
1.5SMC20AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 20 V standoff voltage (VWM), 21.0 V maximum breakdown voltage (VBR), and 1500 W peak pulse power (10/1000 µs). It clamps transients to 27.7 V at 54.2 A peak pulse current and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the 1.5SMC20AHE3/9AT datasheet, 1.5SMC20AHE3/9AT pinout, 1.5SMC20AHE3/9AT application, or 1.5SMC20AHE3/9AT equivalent, this device serves as a robust, low-profile surge protector for DC power rails and signal lines in harsh environments-especially where automotive-grade reliability, fast response (<1 ns), and high surge current handling are required.
Technical Context
The 1.5SMC20AHE3/9AT operates as a unidirectional avalanche diode with glass-passivated junction, optimized for clamping transient overvoltages induced by inductive switching or ESD events. Its 1500 W peak pulse power rating is defined under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, and thermal resistance is specified at RθJA = 75 °C/W.
It features a cathode-band polarity marking, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The device is RoHS-compliant and AEC-Q101 qualified (HE3 suffix), supporting automotive-grade production requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17.1 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC operating margin. |
| VBR (Breakdown Voltage) | 19.0–21.0 V at 1.0 mA test current - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 27.7 V at 54.2 A IPPM - Maximum voltage seen by protected circuit during 1500 W surge; critical for downstream IC survivability. |
| PPPM | 1500 W (10/1000 µs waveform) - Peak transient energy absorption capability; enables protection against lightning-induced surges and load dump. |
| IR (Reverse Leakage) | 1.0 µA max at VWM - Ultra-low leakage preserves power rail integrity and minimizes standby current loss. |
| TJmax | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures without derating. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement; supports automated placement and reflow. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal (reverse bias) | Connected to protected line (e.g., +12 V rail); conducts during positive transients when cathode is held at higher potential. |
| Cathode | Current exit terminal (reverse bias) | Connected to ground or lower-potential reference; defines polarity and clamping direction; marked with band. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics; supports PPAP and long-term reliability requirements. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without degradation when properly mounted on 8 mm × 8 mm copper pads. |
| Glass passivated junction | Ensures stable breakdown characteristics, low leakage, and resistance to humidity and contamination in harsh environments. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD > 30 kV/µs), improving protection margin for sensitive ICs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C), eliminating bake requirements and simplifying SMT manufacturing. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 16750-2) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground, clamping surges within nanoseconds. Use Value: Limits voltage to ≤27.7 V during 54.2 A transients, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation systems exposed to motor noise. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line to ground, suppressing fast EFT bursts (IEC 61000-4-4). Use Value: Sub-1 ns response and 1.0 µA leakage preserve signal fidelity while blocking ±2 kV transients without loading the sensor output. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
|
Use Scenario: Securing 24 V/48 V PoE-powered telecom equipment inputs against lightning-induced surges on outdoor lines. IC Role / Device Role / Timing Role: Primary-level TVS on DC input stage, coordinated with upstream fuses and secondary regulators. Use Value: 1500 W rating handles multi-kA induced surges; DO-214AB footprint allows compact layout near connector entry point. |
Use Scenario: Adding overvoltage resilience to USB Type-A power pins in portable audio devices subjected to hot-plug and adapter faults. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBUS line, placed before USB controller's internal protection diodes. Use Value: 17.1 V VWM permits full 5 V ±5% operation while clamping to 27.7 V during 12 V adapter fault events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same VWM (17.1 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients (e.g., ESD only); unsuitable for load dump or lightning surges. | Select when space-constrained and surge energy is <500 W; verify thermal margin at 100% duty cycle. |
| 1.5KE20A | Same VWM/VC, through-hole DO-201 package, identical 1500 W rating but no AEC-Q101 qualification | Requires wave soldering or hand assembly; not suitable for automotive SMT production or high-reliability vibration environments. | Choose for legacy board upgrades or cost-sensitive industrial designs where AEC-Q101 is not mandated. |
Compared with SMAJ20A and 1.5KE20A, the 1.5SMC20AHE3/9AT uniquely combines AEC-Q101 qualification, SMC surface-mount compatibility, and full 1500 W surge capacity-making it the only option among the three validated for automotive front-end power protection in production vehicles.
Availability
1.5SMC20AHE3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power inputs, and consumer USB power protection requiring stable component supply across extended product lifecycles.
Supply support for 1.5SMC20AHE3/9AT 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 performance.
The 1.5SMC Series is engineered for high-energy transient suppression in automotive, industrial, and telecom systems-designed to replace older axial-leaded TVS families with modern SMT packaging and AEC-Q101 compliance.
FAQ
What is the clamping voltage of the 1.5SMC20AHE3/9AT at its rated peak pulse current?
The 1.5SMC20AHE3/9AT clamps to a maximum of 27.7 V at its rated peak pulse current of 54.2 A (10/1000 µs waveform). This value is measured under standardized test conditions with the device mounted on 0.31" × 0.31" copper pads and represents the upper voltage limit imposed on protected circuits during worst-case surge events.
Is the 1.5SMC20AHE3/9AT suitable for automotive applications?
Yes, the 1.5SMC20AHE3/9AT is AEC-Q101 qualified (denoted by the HE3 suffix) and specifically designed for automotive use, including engine control modules, body electronics, and infotainment power supplies. Its construction, testing, and packaging meet the stress, lifetime, and environmental requirements defined in the AEC-Q101 standard.
What does the "9AT" suffix indicate in 1.5SMC20AHE3/9AT?
The "9AT" suffix denotes a 13-inch diameter plastic tape-and-reel packaging format containing 3500 units per reel. This delivery mode supports high-volume SMT assembly lines and is compatible with standard pick-and-place equipment. The "HE3" portion confirms RoHS compliance and AEC-Q101 qualification.
How does the 1.5SMC20AHE3/9AT differ from bidirectional TVS diodes like 1.5SMC20CA?
The 1.5SMC20AHE3/9AT is unidirectional and functions only during reverse-bias transients (anode negative relative to cathode), making it ideal for DC power rail protection. In contrast, 1.5SMC20CA is bidirectional and protects AC or dual-polarity signals, with symmetrical clamping in both directions-but it lacks the cathode band marking and has different VBR symmetry.
What is the maximum operating junction temperature for the 1.5SMC20AHE3/9AT?
The 1.5SMC20AHE3/9AT has a maximum operating junction temperature (TJmax) of +150 °C, enabling reliable operation in under-hood automotive environments, industrial enclosures, and other high-temperature applications without thermal derating below ambient temperatures up to +125 °C.
1.5SMC20AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 54.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC20AHE3/9AT FAQ
1.How can I place an order for 1.5SMC20AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20AHE3/9AT 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 1.5SMC20AHE3/9AT reliable?
The price and inventory of 1.5SMC20AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC20AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC20AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20AHE3/9AT?
1.5SMC20AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20AHE3/9AT 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 1.5SMC20AHE3/9AT?
For technical support, including 1.5SMC20AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC20AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20AHE3/9AT 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 1.5SMC20AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC20AHE3/9AT?
All 1.5SMC20AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20AHE3/9AT, 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 1.5SMC20AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC20AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20AHE3/9AT Tags
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