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Vishay General Semiconductor - Diodes Division 1.5KE24CA-E3/54
- Part No.:
- 1.5KE24CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE24CA-E3/54.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:1,844
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Product details
Overview
1.5KE24CA-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 24 V breakdown voltage (VBR = 22.8–25.2 V at 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 33.2 V at 45.2 A, and operates across –55 °C to +175 °C. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges in industrial and automotive systems.
For engineers reviewing the 1.5KE24CA-E3/54 datasheet, 1.5KE24CA-E3/54 pinout, 1.5KE24CA-E3/54 application, or 1.5KE24CA-E3/54 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, bidirectional clamping behavior, thermal derating curves, and RoHS-compliant commercial-grade sourcing support - all critical for surge protection design validation and BOM continuity planning.
Technical Context
This device implements a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping in AC-coupled or floating signal paths without polarity constraints, and it maintains stable VBR with ±0.094 %/°C temperature coefficient.
The 1.5KE24CA-E3/54 complies with JEDEC DO-201AD case style, supports 10/1000 µs waveform testing per R.E.A., and delivers 33.2 V clamping at rated IPPM while sustaining 6.5 W steady-state power dissipation on an infinite heatsink at TL = 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V at 1.0 mA - defines reliable conduction onset under bidirectional surge stress |
| VWM | 20.5 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 33.2 V at 45.2 A - clamping voltage limiting downstream component stress during 1500 W transient |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity for lightning and load-switching events |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial power supply environments |
| RθJA | 75 °C/W - thermal resistance indicating need for PCB copper pour or heatsinking in sustained surge scenarios |
| Package | JEDEC DO-201AD (1.5KE) - axial-leaded, epoxy-molded, UL 94 V-0 compliant mechanical form factor |
Pinout & Package
1.5KE24CA-E3/54 uses a two-terminal axial-leaded DO-201AD package (Case Style 1.5KE) with no polarity marking - consistent with its bidirectional function. Leads are matte tin-plated and solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bidirectional surge path terminal | Either lead serves as input/output for symmetrical clamping - no cathode band or polarity identification required |
| Lead 1 / Lead 2 | Thermal and electrical interface | Leads conduct surge current and dissipate heat; 0.375" (9.5 mm) lead length specified for thermal resistance measurement |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR and low leakage (<1 µA at VWM) across temperature and lifetime |
| 1500 W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out with low-inductance traces |
| Sub-nanosecond response time | Clamps transients before sensitive downstream logic or analog circuitry sustains damage |
| UL 94 V-0 epoxy molding | Meets flammability requirements for enclosed industrial and automotive control modules |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance - suitable for high-reliability commercial applications |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and feedback sensors against inductive kickback from 24 V DC solenoids and relay coils. IC Role / Device Role / Timing Role: Bidirectional TVS placed across motor coil terminals or I/O lines to clamp reverse EMF spikes. Use Value: Limits voltage excursion to ≤33.2 V, preventing gate oxide rupture in 40 V-rated MOSFETs and ensuring ASIL-B functional safety compliance. | Use Scenario: Shielding LIN bus transceivers and microcontroller GPIOs from battery dump and load-dump transients. IC Role / Device Role / Timing Role: Standoff protection element connected between LIN line and ground, operating in both polarities during negative/positive surges. Use Value: Maintains signal integrity below 20.5 V standby threshold while clamping 1500 W pulses - eliminating need for additional series impedance. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
Use Scenario: Safeguarding PoE-powered Ethernet PHYs and DC-DC converters from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input rail, coordinated with secondary-side suppressors for cascaded protection. Use Value: Withstands 45.2 A peak current at 33.2 V clamp, reducing risk of catastrophic failure during lightning-induced common-mode events. | Use Scenario: Protecting touch controller inputs and display backlight drivers from ESD and mains coupling in washing machines and HVAC panels. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) bidirectional clamp on front-panel signal lines referenced to chassis ground. Use Value: Prevents false touch detection and LED driver latch-up without degrading 10 kHz PWM timing due to minimal parasitic loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Lower PPPM (600 W), smaller SMB package (surface-mount), higher VC (38.9 V at 15.4 A) | Used where board space is constrained and surge severity is lower (IEC 61000-4-2 Level 3) | Select SMBJ24CA only if layout allows SMT placement and system-level testing confirms 600 W rating suffices. |
| 1.5SMC24CA | Same PPPM (1500 W), SMC package (surface-mount), identical VBR/VC, but higher RθJA (110 °C/W) | Preferred for automated assembly; requires larger thermal pad for equivalent thermal performance | Choose 1.5SMC24CA when production volume justifies SMT reflow process and thermal management via copper area is feasible. |
Compared with 1.5KE24CA-E3/54, SMBJ24CA offers footprint reduction at the cost of 60 % lower surge capacity and higher clamping, while 1.5SMC24CA matches peak power but demands more aggressive PCB thermal design to maintain junction temperature limits under repetitive surges.
Availability
1.5KE24CA-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer appliance control boards requiring stable component supply and long-term BOM continuity.
Supply support for 1.5KE24CA-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 automotive qualification.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments, targeting applications where legacy axial-leaded TVS devices must meet modern surge immunity standards without redesigning PCB layouts.
FAQ
What is the breakdown voltage tolerance for 1.5KE24CA-E3/54?
The 1.5KE24CA-E3/54 has a guaranteed breakdown voltage range of 22.8 V to 25.2 V at 1.0 mA test current, corresponding to ±5 % tolerance around the nominal 24 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for coordinating with downstream overvoltage lockout thresholds in power management ICs.
Is 1.5KE24CA-E3/54 suitable for automotive applications?
1.5KE24CA-E3/54 is a commercial-grade device and not AEC-Q101 qualified. While its –55 °C to +175 °C operating range meets automotive under-hood temperature requirements, it lacks the stress-test validation required for automotive safety-critical systems. For qualified alternatives, consider 1.5KE24CAHE3_B variants explicitly listed in Vishay's AEC-Q101 documentation.
How does the bidirectional nature of 1.5KE24CA-E3/54 affect PCB layout?
The bidirectional design of 1.5KE24CA-E3/54 eliminates polarity concerns during placement - either lead connects to the protected node and the other to ground or reference plane. Layout best practices still require minimizing trace inductance by placing the device directly across the protected line and return path, using wide copper pours for thermal relief, and avoiding vias in the surge current path to preserve sub-ns response.
What is the maximum clamping voltage of 1.5KE24CA-E3/54 under surge conditions?
The maximum clamping voltage of 1.5KE24CA-E3/54 is 33.2 V, measured at its peak pulse current (IPPM) of 45.2 A under standardized 10/1000 µs waveform conditions. This value represents the upper bound of voltage seen by downstream components during worst-case surge events and must be compared against the absolute maximum ratings of protected ICs to ensure margin.
Does 1.5KE24CA-E3/54 require heatsinking in continuous operation?
No - 1.5KE24CA-E3/54 is rated for 6.5 W steady-state power dissipation only when mounted on an infinite heatsink at TL = 75 °C; in normal operation it handles only transient energy, not continuous power. However, repeated surge events can elevate junction temperature, so PCB copper area (≥1 in² per lead) is recommended to manage thermal accumulation and avoid derating below 1500 W capability.
1.5KE24CA-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:
- -
- 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-E3/54 FAQ
1.How can I place an order for 1.5KE24CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE24CA-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 1.5KE24CA-E3/54 reliable?
The price and inventory of 1.5KE24CA-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 1.5KE24CA-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE24CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE24CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE24CA-E3/54?
1.5KE24CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE24CA-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 1.5KE24CA-E3/54?
For technical support, including 1.5KE24CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE24CA-E3/54 requirements.
6.How does Aetrix verify that 1.5KE24CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE24CA-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 1.5KE24CA-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE24CA-E3/54?
All 1.5KE24CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE24CA-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 1.5KE24CA-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE24CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE24CA-E3/54 Tags
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