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Vishay General Semiconductor - Diodes Division 1.5KE20HE3/73
- Part No.:
- 1.5KE20HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE20HE3/73.pdf
- Description:
- TVS DIODE 16.2VWM 29.1VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,102
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Product details
Overview
1.5KE20HE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 20 V breakdown voltage (VBR = 19.0–21.0 V at 1.0 mA), 17.1 V maximum working voltage (VWM), 27.7 V clamping voltage (VC) at 54.2 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the 1.5KE20HE3/73 datasheet, 1.5KE20HE3/73 pinout, 1.5KE20HE3/73 application, or 1.5KE20HE3/73 equivalent, this device is selected for high-energy transient suppression where fast response (<1 ns), low clamping ratio (VC/VWM ≈ 1.62), and AEC-Q101 qualification (HE3 suffix) are required in harsh-environment designs.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below VWM (17.1 V), avalanches sharply at VBR (19.0–21.0 V), and clamps transients to ≤27.7 V at 54.2 A. Its glass-passivated junction ensures stable avalanche characteristics and low leakage (<1.0 µA at VWM).
Thermally, it supports operation from –55 °C to +175 °C junction temperature, with RθJA = 75 °C/W and RθJL = 15.4 °C/W. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification per JESD22-B102 solderability and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 19.0 V / 21.0 V at 1.0 mA - defines precise avalanche initiation window for reliable triggering |
| VWM | 17.1 V - maximum continuous reverse voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 27.7 V at 54.2 A - clamping voltage limiting downstream component stress during 10/1000 µs surge |
| PPPM | 1500 W - peak transient energy absorption capability under standardized 10/1000 µs waveform |
| IFSM | 200 A - non-repetitive forward surge current handling (8.3 ms half-sine), critical for input-stage protection |
| Junction Temp Range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial control environments |
| AEC-Q101 Qualified | Yes (HE3 suffix) - validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: Case Style 1.5KE - axial-leaded, molded epoxy body meeting UL 94 V-0 flammability; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance reference in unidirectional clamp configuration |
| Cathode | Protected line connection / avalanche node | Marked by color band; connects to line being protected (e.g., 12 V rail, CAN-H, sensor supply) |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche behavior and long-term parameter consistency across thermal cycles |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges without derating |
| Clamping ratio VC/VWM = 1.62 | Minimizes overvoltage exposure to downstream ICs while maintaining margin above normal operating voltage |
| AEC-Q101 qualified (HE3) | Validated for automotive use including HTOL, temperature humidity bias, and mechanical shock testing |
| Low incremental surge resistance | Reduces voltage overshoot during fast-rising transients (e.g., ESD, inductive switch-off) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges within 1 ns. Use Value: Limits rail voltage to ≤27.7 V during 1500 W pulses, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to microcontrollers in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line to suppress ESD and switching noise induced by nearby motor drives. Use Value: Clamps transients before they reach ADC inputs, preserving measurement integrity without signal distortion. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Securing 48 V PoE-powered equipment against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input before DC-DC converter, coordinated with secondary MOV/gas tube stages. Use Value: Absorbs up to 1500 W of surge energy while maintaining <1 µA leakage at 41 V nominal, ensuring standby efficiency. |
Use Scenario: Adding overvoltage resilience to USB VBUS lines in portable chargers and docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS between VBUS and GND to block positive-going transients from hot-plug or adapter faults. Use Value: Responds in <1 ns to clamp 15 kV ESD events to safe levels, protecting USB controller and power management ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | DO-214AA package (SMB), 200 W PPPM, lower IPPM (32.4 A), same VBR range (19.0–21.0 V) | Lower surge capacity; suited for space-constrained PCBs where 1500 W is not required | Select SMBJ20A only when board area is critical and surge threat level is limited to IEC 61000-4-2/4-4 |
| 1.5KE20A-E3/54 | Same 1.5KE package and electrical specs, but commercial-grade (non-AEC-Q101), E3 suffix only (JESD201 Class 1A) | Lacks automotive qualification; acceptable for industrial/commercial power supplies with less stringent reliability requirements | Choose 1.5KE20A-E3/54 for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with 1.5KE20HE3/73, SMBJ20A offers smaller footprint but sacrifices >80 % peak power handling, while 1.5KE20A-E3/54 matches form/fit/function but omits automotive qualification - making 1.5KE20HE3/73 the sole choice for AEC-Q101-compliant 1500 W transient suppression in axial-leaded format.
Availability
1.5KE20HE3/73 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply and full AEC-Q101 traceability.
Supply support for 1.5KE20HE3/73 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 1.5KE family was engineered for high-energy transient suppression in demanding environments, targeting automotive, industrial, and telecom applications where robustness and standardized surge immunity are mandatory.
FAQ
What is the clamping voltage of the 1.5KE20HE3/73 under maximum rated surge current?
The 1.5KE20HE3/73 clamps to 27.7 V at its peak pulse current (IPPM) of 54.2 A, measured with a 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet (Document Number 88301, Rev. 09-Aug-2022) and reflects the maximum voltage seen by downstream circuitry during worst-case transient events. Designers use this VC to verify margin over IC absolute maximum ratings.
Is the 1.5KE20HE3/73 suitable for automotive applications?
Yes, the 1.5KE20HE3/73 is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's 88301 datasheet. It has passed stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - making it appropriate for engine control units, body electronics, and ADAS power domains where automotive-grade reliability is mandatory.
How does the 1.5KE20HE3/73 differ from the standard 1.5KE20A part?
The 1.5KE20HE3/73 differs from 1.5KE20A in two key ways: it carries the HE3 suffix indicating AEC-Q101 qualification and JESD201 Class 2 whisker resistance, whereas 1.5KE20A (e.g., -E3/54 variant) is commercial-grade only. Both share identical electrical specs and 1.5KE package, but only 1.5KE20HE3/73 is approved for automotive under-hood use per industry reliability standards.
What is the maximum working voltage (VWM) for the 1.5KE20HE3/73?
The maximum working voltage (VWM) for the 1.5KE20HE3/73 is 17.1 V, defined as the highest DC or RMS voltage the device can withstand continuously without exceeding 1.0 µA reverse leakage current. This value ensures compatibility with 12 V nominal systems while providing sufficient margin below the 19.0–21.0 V breakdown threshold to avoid false triggering during normal operation.
Does the 1.5KE20HE3/73 have polarity marking, and how is it identified?
Yes, the 1.5KE20HE3/73 is unidirectional and features a cathode band - a visible color stripe near one lead end - which identifies the cathode terminal. Per Vishay's datasheet, this band must be oriented toward the line being protected (e.g., 12 V rail), while the anode connects to ground or reference. No marking is present on bidirectional variants, but 1.5KE20HE3/73 is explicitly unidirectional.
1.5KE20HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 16.2V
- Voltage - Breakdown (Min):
- 18V
- Voltage - Clamping (Max) @ Ipp:
- 29.1V
- Current - Peak Pulse (10/1000µs):
- 51.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE20HE3/73 FAQ
1.How can I place an order for 1.5KE20HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE20HE3/73 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 1.5KE20HE3/73 reliable?
The price and inventory of 1.5KE20HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE20HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE20HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE20HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE20HE3/73?
1.5KE20HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE20HE3/73 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 1.5KE20HE3/73?
For technical support, including 1.5KE20HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE20HE3/73 requirements.
6.How does Aetrix verify that 1.5KE20HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE20HE3/73 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 1.5KE20HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE20HE3/73?
All 1.5KE20HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE20HE3/73, 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 1.5KE20HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE20HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE20HE3/73 Tags
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