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Vishay General Semiconductor - Diodes Division 1.5KE20CHE3/73
- Part No.:
- 1.5KE20CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE20CHE3/73.pdf
- Description:
- TVS DIODE 16.2VWM 29.1VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,091
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Product details
Overview
1.5KE20CHE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary 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 against inductive switching transients and ESD.
For engineers reviewing the 1.5KE20CHE3/73 datasheet, 1.5KE20CHE3/73 pinout, 1.5KE20CHE3/73 application, or 1.5KE20CHE3/73 equivalent, this part delivers verified unidirectional clamping performance, AEC-Q101 qualification (HE3 suffix), RoHS-compliant matte tin-plated leads, and UL 94 V-0 molded epoxy packaging - critical for automotive, industrial, and telecom surge protection design validation.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1 µA leakage at VWM), then transitions to low-impedance conduction within <1 ns when transient voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
Rated for 175 °C maximum junction temperature and derated above 25 °C ambient, it supports reliable operation in harsh environments. The 1.5KE package provides 75 °C/W junction-to-ambient thermal resistance and is qualified per JESD 22-B106 (275 °C solder dip, 10 s) and JESD 201 Class 1A whisker test (E3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 19.0 V / 21.0 V at 1.0 mA - defines precise clamping initiation threshold for repeatable overvoltage response |
| VWM | 17.1 V - maximum continuous DC or RMS operating voltage before leakage rises significantly |
| VC @ IPPM | 27.7 V at 54.2 A - clamped voltage during 1500 W transient, limiting stress on downstream components |
| PPPM | 1500 W (10/1000 µs) - peak surge energy absorption capacity without failure |
| IFSM | 200 A (8.3 ms half-sine) - single-event forward surge capability for unidirectional configuration |
| TJ max | 175 °C - enables operation in under-hood automotive and industrial control environments |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 compliant |
Pinout & Package
1.5KE20CHE3/73 uses the standard DO-201AD (Case Style 1.5KE) axial-leaded package. The cathode is marked by a color band on the body; polarity must be observed in circuit placement to ensure correct unidirectional clamping behavior.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during overvoltage events |
| Cathode | High-side protected node | Connected to line being protected (e.g., +12 V rail); color band identifies this end |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance (±5 %) and long-term reliability under thermal cycling |
| 1500 W peak pulse power | Handles high-energy transients from inductive load switching without degradation |
| AEC-Q101 qualified (HE3) | Validated for automotive electronics per stress test requirements including HTOL and TCT |
| UL 94 V-0 molding compound | Provides flame-retardant housing essential for safety-critical industrial and transport systems |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and JESD 22-B102, supporting automated assembly |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground. Use Value: Clamps 12 V system surges up to ±150 V within nanoseconds, preventing latch-up or gate oxide damage in microcontrollers and CAN transceivers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across differential signal pair or single-ended output to ground. Use Value: Limits transient-induced offset errors and prevents ADC saturation or op-amp input stage damage while maintaining signal integrity. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
|
Use Scenario: Safeguarding Ethernet PHY front-end circuits from lightning-induced surges on PoE or data lines. IC Role / Device Role / Timing Role: Primary-level TVS on DC input side of isolated DC/DC converter feeding PHY ICs. Use Value: Absorbs 1500 W surge energy before secondary-side protection activates, reducing failure rate in field-deployed equipment. |
Use Scenario: Overvoltage suppression on AC/DC adapter primary rectifier output before bulk capacitor. IC Role / Device Role / Timing Role: Unidirectional TVS placed across rectified DC bus to clamp switch-mode transient spikes. Use Value: Prevents capacitor overvoltage failure and reduces EMI filter stress during mains transients, improving adapter MTBF. |
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; lower PPPM (600 W); same VBR range (19.0–21.0 V) | Smaller footprint but reduced surge margin; suitable for space-constrained consumer designs | Select SMBJ20A only if board layout prohibits axial-leaded devices and 600 W rating suffices |
| 1.5KE20A-E3/54 | Same 1.5KE package and electrical specs; commercial-grade (non-AEC-Q101) version | Lacks automotive qualification; acceptable for industrial/commercial use where qualification not mandated | Choose 1.5KE20A-E3/54 for cost-sensitive non-automotive applications requiring identical form/fit/function |
Compared with 1.5KE20CHE3/73, SMBJ20A offers smaller size but sacrifices 60 % peak power handling, while 1.5KE20A-E3/54 matches mechanical and electrical performance but omits AEC-Q101 validation - making 1.5KE20CHE3/73 the sole choice for production automotive systems requiring full qualification traceability.
Availability
1.5KE20CHE3/73 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line card surge suppression requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for 1.5KE20CHE3/73 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The 1.5KE series was engineered specifically for robust, high-power transient suppression in harsh environments - emphasizing stable clamping, AEC-Q101 qualification, and UL-certified packaging for mission-critical protection tasks.
FAQ
What is the breakdown voltage tolerance for 1.5KE20CHE3/73?
The 1.5KE20CHE3/73 has a guaranteed breakdown voltage range of 19.0 V to 21.0 V at 1.0 mA test current, corresponding to a ±5 % tolerance. This tight VBR window ensures predictable clamping onset across production lots and temperature ranges, critical for consistent protection in automotive and industrial systems using the 1.5KE20CHE3/73.
Is 1.5KE20CHE3/73 suitable for bidirectional transient suppression?
No - the 1.5KE20CHE3/73 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional operation, Vishay offers the 1.5KE20CA variant. Using 1.5KE20CHE3/73 in bidirectional applications would result in forward conduction during negative transients, potentially causing failure or incorrect clamping behavior.
Does 1.5KE20CHE3/73 meet automotive qualification standards?
Yes - the "HE3" suffix confirms that 1.5KE20CHE3/73 is AEC-Q101 qualified per Vishay's documentation (Document Number 88301, Revision 09-Aug-2022). This includes stress testing for high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of 1.5KE20CHE3/73 at rated peak current?
The 1.5KE20CHE3/73 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 per JEDEC standards and represents the worst-case voltage seen by protected circuitry during a full-rated surge event - a key parameter for ensuring downstream ICs remain within absolute maximum ratings when using the 1.5KE20CHE3/73.
How does the thermal resistance of 1.5KE20CHE3/73 affect PCB layout?
The 1.5KE20CHE3/73 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W. To maintain safe junction temperatures under repeated surges, PCB copper pour around both leads is recommended. Lead length should be kept near the specified 0.375" (9.5 mm) to avoid exceeding thermal limits - critical for sustained reliability in the 1.5KE20CHE3/73's intended applications.
1.5KE20CHE3/73 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:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE20CHE3/73 FAQ
1.How can I place an order for 1.5KE20CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE20CHE3/73 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 1.5KE20CHE3/73 reliable?
The price and inventory of 1.5KE20CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE20CHE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE20CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE20CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE20CHE3/73?
1.5KE20CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE20CHE3/73 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 1.5KE20CHE3/73?
For technical support, including 1.5KE20CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE20CHE3/73 requirements.
6.How does Aetrix verify that 1.5KE20CHE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE20CHE3/73 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 1.5KE20CHE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE20CHE3/73?
All 1.5KE20CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE20CHE3/73, 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 1.5KE20CHE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE20CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE20CHE3/73 Tags
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