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Vishay General Semiconductor - Diodes Division 1.5KE24-E3/54
- Part No.:
- 1.5KE24-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE24-E3/54.pdf
- Description:
- TVS DIODE 19.4VWM 34.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,949
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Product details
Overview
1.5KE24-E3/54 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 22.8 V to 25.2 V breakdown voltage (VBR) at 1 mA, 20.5 V maximum standoff voltage (VWM), 33.2 V clamping voltage (VC) at 45.2 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 1.5KE24-E3/54 datasheet, 1.5KE24-E3/54 pinout, 1.5KE24-E3/54 application, or 1.5KE24-E3/54 equivalent, this part delivers verified clamping performance, RoHS-compliant matte tin-plated leads, JEDEC-standard 1.5KE case packaging, and AEC-Q101 qualification options (HE3 suffix variants) - critical for automotive ECU and telecom surge protection design validation.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches into low-impedance conduction to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low incremental surge resistance, enabling sub-nanosecond response time (<1 ns) to fast-rising transients like ESD or inductive switching spikes.
The device is rated for 175 °C maximum junction temperature and derates linearly above 25 °C ambient per Figure 2; thermal resistance is 75 °C/W (junction-to-ambient) and 15.4 °C/W (junction-to-lead), supporting reliable operation on PCBs with minimal copper area or discrete heatsinking in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V at 1 mA - defines precise avalanche initiation threshold for repeatable clamping onset |
| VWM | 20.5 V - maximum continuous reverse operating voltage before leakage rises above 1 μA |
| VC @ IPPM | 33.2 V at 45.2 A - clamped voltage seen by protected circuit during full 1500 W transient event |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, enabling robust lightning/surge immunity |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), supports high-energy fault clearing |
| TJ max | 175 °C - extended junction temperature range allows deployment in under-hood automotive or industrial enclosures |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 molded epoxy body |
Pinout & Package
1.5KE24-E3/54 uses a two-terminal axial-leaded DO-201AD package (Case Style 1.5KE). The cathode is marked by a color band on the body; polarity must be observed in series connection with DC rails. Leads are matte tin-plated and solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or transient clamping (unidirectional mode) | Connected to ground or low-side reference; enables shunt clamping of positive transients on cathode-connected line |
| Cathode | Current exit point; marked by color band | Connected to protected line (e.g., +12 V rail); avalanche conduction occurs when cathode voltage exceeds VBR relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures ±5 % VBR tolerance and long-term stability under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without external current limiting in many 24 V systems |
| Sub-nanosecond response time | Clamps transients before sensitive ICs experience overstress - critical for protecting CAN, RS-485, and microcontroller I/O |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance; suitable for lead-free reflow and wave soldering at 275 °C (10 s max) |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation required for industrial safety certifications (e.g., UL 62368-1) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against load dump (ISO 16750-2) and alternator transients. IC Role / Device Role / Timing Role: Shunt clamping element placed between battery rail and local regulator input; conducts only during overvoltage events >25.2 V. Use Value: Limits voltage to ≤33.2 V during 1500 W surges, preventing damage to downstream LDOs and MCU power pins without adding series impedance. | Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors connected to long cables in factory automation. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at connector entry point; clamps induced lightning surges (IEC 61000-4-5) on sensor VSUPPLY and GND lines. Use Value: Sub-ns response ensures clamping before transient couples into signal conditioning op-amps, preserving measurement integrity and avoiding latch-up. |
| Telecom DC Feeder Protection | Consumer Power Adapter Output Stage |
Use Scenario: Overvoltage suppression on -48 V DC feeder lines in base station remote radio units (RRUs) exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Cathode tied to -48 V rail, anode to system ground; clamps positive-going transients to protect DC/DC converters and FET drivers. Use Value: 20.5 V VWM allows safe operation across -48 V ±10 % variation while delivering 33.2 V clamping - sufficient margin below converter absolute max ratings. | Use Scenario: Secondary-side output protection in 12 V/5 V wall adapters for smart home hubs, guarding against capacitor failure or feedback loop faults. IC Role / Device Role / Timing Role: Placed across output terminals after rectification; clamps sustained overvoltage before it reaches USB-PD controllers or SoCs. Use Value: 1500 W PPPM handles energy from failed optocoupler or TL431 circuits, preventing fire hazard and meeting UL 62368-1 abnormal operation requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | DO-214AA (SMB) package; lower 600 W PPPM; 38.9 V VC at 15.4 A; 10.5 mm × 7.2 mm footprint | Surface-mount only; unsuitable for through-hole legacy boards or high-current chassis grounding | Select SMBJ24A only if board space is constrained and surge energy is limited to ≤600 W (e.g., low-power IoT nodes). |
| 1.5SMC24A | DO-214AB (SMC) package; same 1500 W rating; 38.9 V VC at 38.5 A; 7.1 mm × 6.2 mm footprint | Higher clamping voltage increases stress on protected ICs; requires tighter layout for thermal dissipation | Choose 1.5SMC24A only when axial-leaded mounting is unavailable and PCB real estate permits SMC footprint with adequate copper pour. |
Compared with 1.5KE24-E3/54, SMBJ24A offers smaller size but sacrifices 60 % peak power and higher clamping voltage, while 1.5SMC24A matches power rating but degrades protection margin due to +5.7 V higher VC - making 1.5KE24-E3/54 optimal for cost-sensitive, high-energy, through-hole designs requiring lowest possible clamping.
Availability
1.5KE24-E3/54 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom DC feeder protection requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE24-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness, consistency, and regulatory compliance (AEC-Q101, UL, RoHS) are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE24-E3/54?
The 1.5KE24-E3/54 has a specified breakdown voltage (VBR) range of 22.8 V to 25.2 V at 1 mA test current, representing a ±5 % tolerance around the nominal 24 V rating. This tight tolerance ensures predictable clamping behavior across production lots and temperature ranges, critical for designs where overvoltage margin must be precisely controlled. All units of 1.5KE24-E3/54 meet this specification per Vishay Document Number 88301.
Can 1.5KE24-E3/54 be used in bidirectional configurations?
No, 1.5KE24-E3/54 is a unidirectional TVS diode and cannot provide symmetrical clamping for AC or bipolar transients. Bidirectional variants require the "CA" suffix (e.g., 1.5KE24CA), which internally connects two diodes in series opposition. Using 1.5KE24-E3/54 in place of a bidirectional part would leave negative-going transients unprotected. Always verify polarity designation: 1.5KE24-E3/54 has a cathode band and is rated only for positive transients on the cathode side.
What is the maximum clamping voltage of 1.5KE24-E3/54 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE24-E3/54 is 33.2 V at 45.2 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value represents the highest voltage imposed on the protected circuit during a full-rated 1500 W transient event. It is measured per JEDEC standards and confirmed in Vishay's 88301 datasheet - a key parameter for ensuring downstream ICs remain within their absolute maximum voltage ratings during surge events.
Is 1.5KE24-E3/54 RoHS compliant and lead-free solder compatible?
Yes, the "E3" suffix in 1.5KE24-E3/54 indicates full RoHS compliance and compatibility with lead-free soldering processes. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability requirements, and the device withstands solder dip at 275 °C for up to 10 seconds per JESD 22-B106. It also passes JESD 201 Class 1A whisker testing - confirming suitability for high-reliability assembly in automotive and industrial applications.
How does thermal resistance affect the derating of 1.5KE24-E3/54 in PCB designs?
The 1.5KE24-E3/54 has a junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15.4 °C/W. In PCB layouts with minimal copper area, power dissipation must be derated above 25 °C ambient per Figure 2 in the datasheet - e.g., at 75 °C ambient, only ~50 % of rated 6.5 W steady-state power is allowable. For repeated surge events, thermal mass and lead heat sinking dominate; using ≥0.375" lead length and wide copper traces significantly improves transient energy handling beyond datasheet single-pulse limits.
1.5KE24-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 19.4V
- Voltage - Breakdown (Min):
- 21.6V
- Voltage - Clamping (Max) @ Ipp:
- 34.7V
- Current - Peak Pulse (10/1000µs):
- 43.2A
- 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
1.5KE24-E3/54 FAQ
1.How can I place an order for 1.5KE24-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE24-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 1.5KE24-E3/54 reliable?
The price and inventory of 1.5KE24-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 1.5KE24-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE24-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE24-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE24-E3/54?
1.5KE24-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE24-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 1.5KE24-E3/54?
For technical support, including 1.5KE24-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE24-E3/54 requirements.
6.How does Aetrix verify that 1.5KE24-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE24-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 1.5KE24-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE24-E3/54?
All 1.5KE24-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE24-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 1.5KE24-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE24-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE24-E3/54 Tags
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