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Vishay General Semiconductor - Diodes Division 1.5KE20CHE3/54
- Part No.:
- 1.5KE20CHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE20CHE3/54.pdf
- Description:
- TVS DIODE 16.2VWM 29.1VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,481
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Product details
Overview
1.5KE20CHE3/54 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 in industrial and automotive electronics.
For engineers reviewing the 1.5KE20CHE3/54 datasheet, 1.5KE20CHE3/54 pinout, 1.5KE20CHE3/54 application, or 1.5KE20CHE3/54 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping performance under surge conditions, thermal derating behavior, and AEC-Q101-qualified alternatives for automotive-grade designs.
Technical Context
The 1.5KE20CHE3/54 operates as a silicon avalanche diode with glass-passivated junction, delivering sub-nanosecond response time (<1 ns) to transient overvoltages. Its unidirectional polarity uses a cathode band marking and exhibits low incremental surge resistance, enabling precise clamping during 8.3 ms half-sine or 10/1000 µs surges.
Thermal design relies on RθJA = 75 °C/W (junction-to-ambient) and RθJL = 15.4 °C/W (junction-to-lead), with maximum junction temperature rated at +175 °C. Power dissipation is derated linearly above TA = 25 °C per Figure 2, and it supports 200 A non-repetitive forward surge current (IFSM) per JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 19.0 V / 21.0 V at IT = 1.0 mA - defines reliable avalanche initiation threshold for overvoltage detection |
| VWM | 17.1 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 27.7 V at 54.2 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream components |
| PPPM | 1500 W - peak pulse power handling capability, critical for lightning and inductive-switching transient suppression |
| IFSM | 200 A - single half-sine surge current rating (8.3 ms), supporting high-energy fault events |
| TJ max. | +175 °C - enables operation in under-hood automotive or high-temperature industrial environments |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - axial-leaded, RoHS-compliant, 0.375" lead length, UL 94 V-0 molded epoxy |
Pinout & Package
1.5KE20CHE3/54 uses the standard DO-201AD axial package (Case Style 1.5KE), with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. The cathode is marked by a color band; no marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to lower-potential side of protected circuit; conducts during positive transients when cathode is biased higher |
| Cathode | Avalanche clamping terminal | Marked end; connects to higher-potential rail; initiates controlled breakdown when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 µs) | Provides robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation |
| Sub-nanosecond response time | Clamps transients before sensitive logic or analog circuitry experiences damaging overvoltage |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units and body electronics |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes let-through energy and reduces stress on protected ICs compared to higher-ratio suppressors |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control modules from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Primary clamping device placed at board entry point to shunt surge energy before reaching DC/DC converters and microcontrollers. Use Value: Limits rail voltage to ≤27.7 V during 54.2 A surges, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V logic. | Use Scenario: Shielding analog outputs of pressure or temperature sensors connected to long cables in factory automation systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed across sensor output and ground to absorb ESD and inductive kickback from nearby solenoids. Use Value: Clamps fast transients within 1 ns while maintaining <1.0 µA leakage at 17.1 V, preserving sensor accuracy and offset stability. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY power pins and bias rails in PoE-powered switches exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Secondary-level TVS on 48 V intermediate bus, coordinated with upstream GDTs and series impedance. Use Value: Delivers 1500 W pulse handling with 27.7 V clamping, reducing risk of catastrophic failure during multi-kV induced transients. | Use Scenario: Overvoltage protection on AC-DC adapter primary-side rectifier output in USB-C PD chargers. IC Role / Device Role / Timing Role: Unidirectional suppressor across bulk capacitor to clamp switching spikes and line surges before the PWM controller. Use Value: Withstands 200 A IFSM and maintains VWM = 17.1 V, ensuring compatibility with 19–20 V nominal input rails and avoiding false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | DO-214AA package (SMB), 20 V VBR, 30 V VC @ 43.3 A, 600 W PPPM | Lower power rating; suited for space-constrained PCBs where 1500 W is not required | Select SMBJ20A when board area is limited and surge threat level is IEC 61000-4-5 Level 2–3. |
| 1.5KE20CAHE3_B | Bidirectional variant, same VBR range, identical 1500 W rating and DO-201AD package | Required for AC-coupled or floating signal lines where polarity reversal occurs (e.g., RS-485, CAN bus) | Choose 1.5KE20CAHE3_B only when protecting bidirectional data lines or AC rails - not a drop-in replacement for unidirectional use. |
Compared with 1.5KE20CHE3/54, SMBJ20A offers smaller footprint but reduced surge capacity, while 1.5KE20CAHE3_B provides identical power handling in bidirectional configuration - both require layout or system-level validation due to polarity and clamping profile differences.
Availability
1.5KE20CHE3/54 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line surge suppression requiring stable component supply across extended production cycles.
Supply support for 1.5KE20CHE3/54 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, power efficiency, and AEC-Q qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and thermal robustness are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE20CHE3/54?
The 1.5KE20CHE3/54 has a specified breakdown voltage range of 19.0 V to 21.0 V at test current IT = 1.0 mA, corresponding to ±5 % tolerance around the nominal 20 V rating. This tight VBR window ensures consistent clamping onset across production lots and supports predictable system-level overvoltage margining in designs using 1.5KE20CHE3/54.
Is 1.5KE20CHE3/54 RoHS compliant and halogen-free?
Yes, 1.5KE20CHE3/54 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and halogen-free status per IEC 61249-2-21. The molding compound meets UL 94 V-0 flammability rating, and terminals are matte tin-plated per J-STD-002, confirming suitability for lead-free reflow and wave soldering processes in modern electronics manufacturing.
Does 1.5KE20CHE3/54 meet AEC-Q101 requirements?
Yes, the "HE3" in 1.5KE20CHE3/54 denotes AEC-Q101 qualification, validated for automotive applications including engine control, body electronics, and ADAS subsystems. Testing covers temperature cycling, HTRB, HTGB, and ESD per AEC-Q101 Rev D, with revision code "B" indicating the qualified version per Vishay's ordering matrix.
What is the maximum clamping voltage of 1.5KE20CHE3/54 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE20CHE3/54 is 27.7 V at peak pulse current IPPM = 54.2 A with a 10/1000 µs waveform. This value is measured per JEDEC standards and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events - a key parameter for validating safe operating margins of downstream ICs using 1.5KE20CHE3/54.
Can 1.5KE20CHE3/54 be used in parallel for higher surge current handling?
While 1.5KE20CHE3/54 may be placed in parallel to increase total surge current capacity, Vishay does not recommend it without external balancing resistors due to VBR mismatch between units. Uneven current sharing can cause premature failure of one device. For higher ratings, select higher-power variants like 3KP20A instead of paralleling multiple 1.5KE20CHE3/54 units.
1.5KE20CHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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
1.5KE20CHE3/54 FAQ
1.How can I place an order for 1.5KE20CHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE20CHE3/54 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 1.5KE20CHE3/54 reliable?
The price and inventory of 1.5KE20CHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE20CHE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE20CHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE20CHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE20CHE3/54?
1.5KE20CHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE20CHE3/54 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 1.5KE20CHE3/54?
For technical support, including 1.5KE20CHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE20CHE3/54 requirements.
6.How does Aetrix verify that 1.5KE20CHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE20CHE3/54 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 1.5KE20CHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE20CHE3/54?
All 1.5KE20CHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE20CHE3/54, 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 1.5KE20CHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE20CHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE20CHE3/54 Tags
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