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Vishay General Semiconductor - Diodes Division 1.5SMC20AHE3_A/I
- Part No.:
- 1.5SMC20AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20AHE3_A/I.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,077
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Product details
Overview
1.5SMC20AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power (10/1000 μs), 27.7 V clamping voltage at 54.2 A peak pulse current, and 17.1 V stand-off voltage - deployed on power rails and signal lines of automotive ECUs and industrial motor drives.
For engineers reviewing the 1.5SMC20AHE3_A/I datasheet, 1.5SMC20AHE3_A/I pinout, 1.5SMC20AHE3_A/I application, or 1.5SMC20AHE3_A/I equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), polarity marking convention, and real-world design implications for ESD and lightning transient suppression in harsh environments.
Technical Context
This TVS diode operates as a unidirectional clamping device with a glass-passivated junction, enabling fast response (<1 ns) to transients while maintaining low incremental surge resistance. Its breakdown voltage is specified at 19.0–21.0 V (IT = 1.0 mA), and it exhibits a temperature coefficient of +0.090 %/°C for VBR.
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), supports operation from −65 °C to +150 °C, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak - confirming suitability for automated SMT assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains high-energy surges common in automotive load-dump and industrial switching events without failure |
| Clamping Voltage (VC) | 27.7 V at IPPM = 54.2 A - defines maximum voltage seen by protected IC during worst-case surge |
| Stand-off Voltage (VWM) | 17.1 V - ensures no conduction during normal 12 V system operation, including cold-crank dips |
| Breakdown Voltage (VBR) | 19.0–21.0 V at IT = 1.0 mA - establishes precise turn-on threshold for transient clamping |
| Reverse Leakage (ID) | 1.0 μA max at VWM - guarantees minimal standby power loss and signal integrity in low-current circuits |
| Junction Temperature Range | −65 °C to +150 °C - enables deployment in under-hood automotive and industrial ambient conditions |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements (HTOL, TCT, ESD, etc.) |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), with cathode band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during reverse-biased clamping | Connected to protected line (e.g., 12 V rail); must be routed with low-inductance trace to minimize overshoot |
| Cathode | Current exit terminal during clamping; marked with band | Connected to ground reference plane; requires low-impedance path to handle 54.2 A peak pulse current |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surges up to 4 kV |
| Glass passivated chip junction | Ensures stable VBR over time and temperature, critical for long-life automotive deployments |
| MSL Level 1 (260 °C peak) | Eliminates pre-bake requirement for standard reflow processes, reducing manufacturing cost and cycle time |
| AEC-Q101 qualification (HE3 suffix) | Validates reliability for automotive applications including engine control, body electronics, and ADAS sensors |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD > 30 kV/μs) |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Input |
|---|---|
Use Scenario: Protects microcontroller power supply and CAN transceiver pins from load-dump transients during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS clamps reverse-polarity and overvoltage spikes on 12 V input rail before they reach LDOs and communication ICs. Use Value: Limits clamped voltage to 27.7 V, staying below absolute maximum ratings of 33 V tolerant automotive MCUs and CAN PHYs. |
Use Scenario: Shields gate driver ICs and current-sense amplifiers from inductive kickback when PWM-controlled IGBTs switch off. IC Role / Device Role / Timing Role: Fast-response TVS diverts energy from MOSFET/IGBT drain-source nodes during flyback events. Use Value: 1500 W rating handles repetitive 10/1000 μs surges typical in 48 V industrial motor systems with <1% duty cycle. |
| Telecom Base Station DC Power Feed | Consumer Appliance Mainboard 24 V Rail |
Use Scenario: Guards PoE-powered RF modules and backhaul interfaces against lightning-induced surges entering via outdoor DC feed lines. IC Role / Device Role / Timing Role: Standoff voltage (17.1 V) blocks normal 24 V operation while clamping >30 V transients to protect Ethernet PHYs and PMICs. Use Value: 27.7 V clamping ensures downstream 3.3 V/5 V regulators remain within safe input range even during 6 kV IEC 61000-4-5 tests. |
Use Scenario: Safeguards MCU reset circuitry and display backlight drivers from relay-contact bounce and transformer coupling noise. IC Role / Device Role / Timing Role: Low-leakage (1.0 μA) TVS prevents false resets or flicker in always-on standby modes. Use Value: RθJA = 75 °C/W allows direct PCB copper pad mounting without heatsink, simplifying white-goods layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A-E3/52 | Lower peak power (600 W), same VWM/VC, SMB (DO-214AA) package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer boards but not automotive load-dump duty cycles | Select when board area is critical and surge energy is ≤600 W (e.g., USB-C PD protection) |
| 1.5KE20A-T | Through-hole TO-204AE (DO-41), 1500 W rating, identical VBR/VC, higher RθJA (100 °C/W) | Used in legacy industrial designs where manual assembly or high-vibration retention is required | Choose only if SMT is unavailable or mechanical robustness outweighs thermal performance |
Compared with 1.5SMC20AHE3_A/I, SMBJ20A-E3/52 trades peak power and thermal margin for compact size, while 1.5KE20A-T sacrifices PCB assembly efficiency and thermal performance for through-hole ruggedness - making 1.5SMC20AHE3_A/I optimal for AEC-Q101-compliant SMT production requiring full 1500 W capability.
Availability
1.5SMC20AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU designs, industrial motor drive protection, telecom DC feed systems, and consumer appliance mainboards requiring stable component supply with AEC-Q101 validation and RoHS/halogen-free compliance.
Supply support for 1.5SMC20AHE3_A/I 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, power handling, and automotive qualification.
The 1.5SMC Series was developed specifically for high-power, surface-mount transient suppression in automotive, industrial, and telecom infrastructure - balancing clamping performance, thermal robustness, and automated assembly compatibility.
FAQ
What is the clamping voltage of the 1.5SMC20AHE3_A/I under maximum surge conditions?
The 1.5SMC20AHE3_A/I has a maximum clamping voltage (VC) of 27.7 V at 54.2 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during worst-case transient events - critical for ensuring downstream ICs like automotive MCUs or CAN transceivers remain within their absolute maximum ratings.
Is the 1.5SMC20AHE3_A/I qualified for automotive use?
Yes, the 1.5SMC20AHE3_A/I carries the HE3 suffix, indicating it is RoHS-compliant and AEC-Q101 qualified. This certification covers stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), and ESD (HBM/MM), validating its reliability for under-hood and chassis-mounted automotive electronics such as engine control units and body control modules.
How does the 1.5SMC20AHE3_A/I differ from bidirectional variants like 1.5SMC20CA?
The 1.5SMC20AHE3_A/I is unidirectional and features a cathode band marking; it conducts only during reverse-bias overvoltage events. In contrast, 1.5SMC20CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. Use 1.5SMC20AHE3_A/I for DC power rail protection (e.g., 12 V inputs), and 1.5SMC20CA only where AC or dual-polarity signal lines require suppression.
What is the thermal resistance of the 1.5SMC20AHE3_A/I, and how does it affect PCB layout?
The 1.5SMC20AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This value assumes minimum recommended pad layout per Vishay spec; reducing pad area increases RθJA, risking thermal runaway during repetitive surges - so designers must maintain full pad dimensions and avoid routing traces under the device body.
Can the 1.5SMC20AHE3_A/I replace older through-hole TVS diodes like P6KE20A?
No direct replacement: while both have similar VBR and VC, the 1.5SMC20AHE3_A/I is SMD-only (SMC package), AEC-Q101 qualified, and rated for 1500 W with lower RθJA. P6KE20A is through-hole (DO-15), lacks automotive qualification, and has higher thermal resistance. Migration requires PCB redesign but delivers superior surge handling, reliability, and assembly efficiency in new automotive and industrial designs.
1.5SMC20AHE3_A/I 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:
- Active
- 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_A/I FAQ
1.How can I place an order for 1.5SMC20AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20AHE3_A/I 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_A/I reliable?
The price and inventory of 1.5SMC20AHE3_A/I 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_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC20AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20AHE3_A/I?
1.5SMC20AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20AHE3_A/I 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_A/I?
For technical support, including 1.5SMC20AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20AHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC20AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20AHE3_A/I 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_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC20AHE3_A/I?
All 1.5SMC20AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20AHE3_A/I, 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_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC20AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20AHE3_A/I Tags
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