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Vishay General Semiconductor - Diodes Division 1.5KE20A-E3/54
- Part No.:
- 1.5KE20A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE20A-E3/54.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,240
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Product details
Overview
1.5KE20A-E3/54 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 stand-off 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 power supplies.
For engineers reviewing the 1.5KE20A-E3/54 datasheet, 1.5KE20A-E3/54 pinout, 1.5KE20A-E3/54 application, or 1.5KE20A-E3/54 equivalent, this page delivers verified electrical parameters, JEDEC-standard DO-201AE package details, clamping performance under surge conditions, and direct alternative options for circuit protection redesigns requiring stable transient suppression.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches rapidly (<1 ns response) to divert surge current away from downstream components. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and low incremental surge resistance, critical for repeatable clamping at 54.2 A IPPM.
Thermal design relies on its 15.4 °C/W junction-to-lead thermal resistance and 75 °C/W junction-to-ambient rating; derating begins above 25 °C ambient per Figure 2, supporting operation up to +175 °C junction temperature. The device is RoHS-compliant (E3 suffix), matte tin-plated, and qualified to JESD 201 Class 1A whisker standard.
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 threshold for reliable overvoltage detection |
| VWM | 17.1 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 27.7 V at 54.2 A - clamped voltage during 1500 W surge, limiting stress on protected ICs |
| IPPM | 54.2 A (10/1000 µs) - peak surge current handling capacity without failure |
| PPPM | 1500 W - standardized surge power rating enabling comparison across TVS families |
| TJ max | +175 °C - supports high-temperature environments like automotive engine compartments |
| IFSM | 200 A (8.3 ms half-sine) - forward surge capability for rare polarity-reversal events |
Pinout & Package
1.5KE20A-E3/54 uses the industry-standard DO-201AE axial-leaded package (Case Style 1.5KE), with cathode indicated by a color band on the body. Leads are matte tin-plated and solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts only during forward surges (rare) |
| Cathode | Avalanche clamping terminal | Connected to higher-potential side; initiates clamping when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance (±5 %) and low leakage (<1 µA) over temperature and lifetime |
| 1500 W peak pulse power | Handles industrial lightning-induced transients (IEC 61000-4-5 Level 4) without degradation |
| <1 ns response time | Clamps before sensitive logic or analog circuits experience damaging overvoltage |
| RoHS-compliant E3 suffix | Meets global environmental regulations and JESD 201 Class 1A whisker resistance for high-reliability assembly |
| UL 497B recognized (QVGQ2) | Validated for telecom and industrial surge protection systems requiring safety certification |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V DC input rails in PLC modules against inductive switching spikes from solenoids and relays. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed across input terminals to clamp surges before they reach DC-DC converters and microcontrollers. Use Value: Limits rail voltage to ≤27.7 V during 54.2 A transients, preventing latch-up or gate oxide damage in downstream silicon. | Use Scenario: Safeguarding CAN/LIN bus transceivers and temperature/hall-effect sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground to absorb negative-going transients while preserving signal integrity. Use Value: Clamps sub-20 ns spikes within 1 ns, maintaining <1 µA leakage at 17.1 V to avoid sensor bias errors. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Front-end protection for Ethernet PHYs and DSL line drivers subjected to lightning-induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair inputs, coordinated with secondary GDT or polymer PTC devices. Use Value: Withstands 1500 W surges per IEC 61000-4-5, reducing need for multi-stage protection and board space. | Use Scenario: Overvoltage suppression on brushed DC motor H-bridge outputs in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp flyback energy during PWM commutation. Use Value: Absorbs repetitive 10/1000 µs surges at 0.01 % duty cycle without parameter drift, extending system 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 (smaller footprint), 20 V VBR, 30 V VC @ 43.3 A, 600 W PPPM | Lower surge rating suits space-constrained consumer electronics; not rated for 1500 W industrial transients | Select SMBJ20A only when board area is critical and surge energy is ≤600 W. |
| 1.5SMC20A | SMA package (surface-mount), same 20 V VBR, 27.7 V VC @ 54.2 A, 1500 W PPPM, but 175 °C TJ max and UL 497B recognition | Drop-in SMT replacement for automated assembly; identical clamping but requires re-layout from axial to SMD | Choose 1.5SMC20A for new designs targeting pick-and-place efficiency without sacrificing protection level. |
Compared with 1.5KE20A-E3/54, SMBJ20A offers smaller size but reduced surge capacity, while 1.5SMC20A matches full electrical performance in an SMT package - making it ideal for volume production where assembly automation and thermal reliability are prioritized over through-hole serviceability.
Availability
1.5KE20A-E3/54 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, telecom line cards, and consumer appliance motor drives requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE20A-E3/54 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, and protection devices with emphasis on reliability, power handling, and qualification for harsh environments.
The 1.5KE series was engineered specifically for high-energy transient suppression in industrial, automotive, and telecom infrastructure - delivering consistent 1500 W clamping performance in rugged DO-201AE packaging with AEC-Q101 options available for automotive variants.
FAQ
What is the breakdown voltage range of the 1.5KE20A-E3/54?
The 1.5KE20A-E3/54 has a guaranteed breakdown voltage (VBR) range of 19.0 V to 21.0 V at a test current of 1.0 mA, measured per JEDEC standard. This tight ±5 % tolerance ensures predictable clamping onset across production lots and temperature extremes, directly supporting robust overvoltage margining in 24 V system designs. The 1.5KE20A-E3/54 maintains this specification across its full operating junction temperature range of –55 °C to +175 °C.
Is the 1.5KE20A-E3/54 suitable for automotive applications?
The 1.5KE20A-E3/54 is RoHS-compliant and meets JESD 201 Class 1A whisker resistance, but it is not AEC-Q101 qualified. For automotive use, Vishay offers the 1.5KE20AHE3_B variant (with HE3 suffix), which carries full AEC-Q101 qualification. Engineers must specify the HE3 version - not the E3/54 - when designing for engine bay or chassis-mounted modules requiring automotive-grade reliability. The 1.5KE20A-E3/54 remains appropriate for non-automotive industrial and telecom applications.
What is the clamping voltage of the 1.5KE20A-E3/54 under surge conditions?
The 1.5KE20A-E3/54 exhibits a maximum clamping voltage (VC) of 27.7 V when subjected to its rated 54.2 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value represents the upper limit of voltage seen by protected circuitry during worst-case surge events and is critical for ensuring downstream ICs remain within absolute maximum ratings. The 1.5KE20A-E3/54 achieves this with low incremental surge resistance, minimizing voltage overshoot beyond VC.
How does the 1.5KE20A-E3/54 differ from bidirectional TVS diodes like 1.5KE20CA?
The 1.5KE20A-E3/54 is unidirectional and functions only in reverse-bias avalanche mode, with a defined cathode band; it blocks forward current until ~3.5 V. In contrast, 1.5KE20CA is bidirectional, symmetrically clamping both polarities - making it suitable for AC lines or differential signals. The 1.5KE20A-E3/54's lower leakage (<1 µA at 17.1 V) and tighter VBR tolerance make it preferable for DC rail protection, whereas 1.5KE20CA would be selected for telecom line or RS-485 bus protection where polarity reversal occurs.
What packaging and reel configuration is supplied for the 1.5KE20A-E3/54?
The 1.5KE20A-E3/54 ships in 13-inch diameter paper tape and reel format, with a base quantity of 1400 pieces per reel and a preferred package code of "54". Its DO-201AE case style features 0.375 inch (9.5 mm) lead length, matte tin-plated leads compliant with J-STD-002, and a molded epoxy body rated UL 94 V-0. The "E3" suffix confirms RoHS compliance and JESD 201 Class 1A whisker resistance - essential for lead-free reflow and long-term field reliability. The 1.5KE20A-E3/54 is not supplied in bulk or ammo pack.
1.5KE20A-E3/54 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:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE20A-E3/54 FAQ
1.How can I place an order for 1.5KE20A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE20A-E3/54 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 1.5KE20A-E3/54 reliable?
The price and inventory of 1.5KE20A-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE20A-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE20A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE20A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE20A-E3/54?
1.5KE20A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE20A-E3/54 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 1.5KE20A-E3/54?
For technical support, including 1.5KE20A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE20A-E3/54 requirements.
6.How does Aetrix verify that 1.5KE20A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE20A-E3/54 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 1.5KE20A-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE20A-E3/54?
All 1.5KE20A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE20A-E3/54, 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 1.5KE20A-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE20A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE20A-E3/54 Tags
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