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Vishay General Semiconductor - Diodes Division 1.5KE24CA/54
- Part No.:
- 1.5KE24CA/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE24CA/54.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,420
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Product details
Overview
1.5KE24CA from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on signal and power lines. It features a 24 V breakdown voltage (VBR = 22.8–25.2 V at 1 mA), 1500 W peak pulse power (10/1000 µs), 33.2 V maximum clamping voltage at 45.2 A, and operates from –55 °C to +175 °C - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the 1.5KE24CA datasheet, 1.5KE24CA pinout, 1.5KE24CA application, or 1.5KE24CA equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, JEDEC 1.5KE package details, thermal resistance (RθJA = 75 °C/W), and direct alternatives with documented VWM, VC, and IPPM differences.
Technical Context
The 1.5KE24CA uses a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its bidirectional structure enables symmetrical clamping in AC-coupled or floating circuits without polarity concerns, supporting both positive and negative surges up to 1500 W.
It complies with JEDEC standards for transient suppression and meets UL 497B recognition (QVGQ2). The device is rated for 10/1000 µs waveform testing per Fig. 1, with derating above 25 °C ambient per Fig. 2, and supports soldering per JESD 22-B106 (275 °C max, 10 s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V at 1 mA - defines reliable conduction onset under bidirectional surge conditions |
| VWM | 20.5 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 33.2 V at 45.2 A - clamped voltage during full 1500 W transient, limiting stress on downstream ICs |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform, 0.01 % duty cycle |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance, critical for PCB layout and heatsinking decisions |
| TJ range | –55 °C to +175 °C - enables use in under-hood automotive and industrial environments |
| ID @ VWM | ≤1.0 µA - ultra-low leakage ensures minimal standby power loss in battery-powered systems |
Pinout & Package
Package: JEDEC Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, RoHS compliant (E3 suffix), 0.375" lead length standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Surge current path | No polarity marking; symmetric terminals handle ± transients equally - no orientation required during placement |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5 %) and long-term reliability under repeated surge stress |
| 1500 W peak pulse rating | Withstands lightning-induced surges (IEC 61000-4-5 Level 4 equivalent) on 24 V industrial buses |
| Sub-nanosecond response time | Clamps transients before sensitive logic or analog circuitry experiences overvoltage damage |
| AEC-Q101 qualified option available | HE3 suffix variants meet automotive-grade qualification for engine control and ADAS sensor interfaces |
| UL 497B recognized | Validated for telecom and industrial surge protection applications requiring safety agency approval |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and temperature/pressure sensors from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential signal pair or supply rail to shunt surge energy to ground. Use Value: Limits transient voltage to ≤33.2 V, preventing latch-up or gate oxide rupture in 3.3 V/5 V microcontrollers and analog front-ends. | Use Scenario: Safeguarding 24 V digital input modules against inductive kickback from solenoids and contactors in factory automation. IC Role / Device Role / Timing Role: Standoff protector on field-side inputs, operating continuously at 20.5 V while clamping >24 V spikes within 1 ns. Use Value: Eliminates need for external series impedance or RC filtering, reducing BOM count and board space in DIN-rail mounted controllers. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Secondary-side surge protection on Ethernet PHY or RS-485 transceiver lines exposed to induced lightning per R.E.A. P.E. 60. IC Role / Device Role / Timing Role: Fast-acting bidirectional clamp between data line and chassis ground, absorbing 8/20 µs and 10/1000 µs impulses. Use Value: Maintains signal integrity below 1 pF capacitance while delivering 1500 W pulse handling - no data distortion or timing skew. | Use Scenario: Output rail protection in 12–24 V wall adapters subjected to mains-borne surges and hot-plug transients. IC Role / Device Role / Timing Role: Final-stage TVS across DC output, activated only during overvoltage events to prevent damage to connected devices. Use Value: Withstands repetitive 1500 W pulses at 0.01 % duty cycle, enabling robust compliance with UL 62368-1 Annex D 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 |
|---|---|---|---|
| Littelfuse SMAJ24CA | VBR = 26.7–29.5 V, VC = 38.9 V @ 38.6 A, PPPM = 400 W, DO-214AC package | Lower power rating and higher clamping voltage - suitable for cost-sensitive consumer designs with lower surge exposure | Select when footprint constraints favor SMC/SMA packages and system-level surge tests require ≤400 W handling |
| ON Semiconductor 1.5SMC24CA | VBR = 25.1–27.7 V, VC = 35.5 V @ 42.3 A, PPPM = 1500 W, SMC package (DO-214AB) | Same power rating but 2.3 V higher VBR and 2.3 V higher VC - tighter tolerance not guaranteed for 24 V nominal rails | Choose if SMC footprint is already standardized in layout and VWM margin allows 22.6 V standoff |
Compared with 1.5KE24CA, SMAJ24CA offers smaller size but reduced surge capacity and higher clamping; 1.5SMC24CA matches power but raises clamping threshold - making 1.5KE24CA optimal for 24 V systems needing lowest possible VC and JEDEC-standard through-hole mounting.
Availability
1.5KE24CA is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter outputs requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE24CA 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 high-power handling.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where 1500 W surge immunity and wide temperature operation are mandatory.
FAQ
What is the breakdown voltage range of the 1.5KE24CA?
The 1.5KE24CA has a minimum breakdown voltage (VBR) of 22.8 V and a maximum of 25.2 V, measured at 1 mA test current per JEDEC standard. This tight 5 % tolerance ensures predictable clamping onset across production lots and temperature extremes, directly supporting design margin calculations for 24 V nominal systems.
Is the 1.5KE24CA unidirectional or bidirectional?
The 1.5KE24CA is a bidirectional Transient Voltage Suppressor, indicated by the "CA" suffix. It provides symmetrical clamping for both positive and negative voltage transients without polarity sensitivity - ideal for AC-coupled lines, differential interfaces, and floating grounds where direction of surge cannot be assumed.
What is the maximum clamping voltage of the 1.5KE24CA at its rated peak pulse current?
The 1.5KE24CA clamps to a maximum of 33.2 V at its peak pulse current (IPPM) of 45.2 A, defined under the 10/1000 µs waveform. This value is critical for ensuring downstream components - such as 3.3 V or 5 V microcontrollers - remain within absolute maximum ratings during surge events.
Does the 1.5KE24CA meet automotive qualification standards?
The base 1.5KE24CA is commercial-grade; however, the variant 1.5KE24CAHE3_B is AEC-Q101 qualified and explicitly listed in Vishay's documentation for automotive applications. This qualified version undergoes extended stress testing including temperature cycling, HTRB, and ESD, making it suitable for engine control and ADAS sensor interfaces.
What package type does the 1.5KE24CA use, and what are its key mechanical properties?
The 1.5KE24CA uses JEDEC Case Style 1.5KE - a through-hole axial-leaded package with molded epoxy body meeting UL 94 V-0 flammability rating. Leads are matte tin-plated and solderable per J-STD-002/JESD 22-B102, with 0.375" (9.5 mm) standard lead length and 75 °C/W junction-to-ambient thermal resistance.
1.5KE24CA/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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 45.2A
- 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
1.5KE24CA/54 FAQ
1.How can I place an order for 1.5KE24CA/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE24CA/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 1.5KE24CA/54 reliable?
The price and inventory of 1.5KE24CA/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE24CA/54 is usually 5 days.
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6.How does Aetrix verify that 1.5KE24CA/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE24CA/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 1.5KE24CA/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE24CA/54?
All 1.5KE24CA/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE24CA/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 1.5KE24CA/54 part is unused and in its original packaging.
Return procedure for 1.5KE24CA/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE24CA/54 Tags
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