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Vishay General Semiconductor - Diodes Division 1.5KE24A-E3/54
- Part No.:
- 1.5KE24A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE24A-E3/54.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:1,356
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Product details
Overview
1.5KE24A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 22.8 V to 25.2 V breakdown voltage (VBR), 20.5 V standoff voltage (VWM), 33.2 V clamping voltage (VC) at 45.2 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across -55 °C to +175 °C junction temperature. It is commonly deployed in automotive power supply inputs and industrial sensor interface circuits.
For engineers reviewing the 1.5KE24A-E3/54 datasheet, 1.5KE24A-E3/54 pinout, 1.5KE24A-E3/54 application, or 1.5KE24A-E3/54 equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under surge conditions, thermal resistance data (RθJA = 75 °C/W), and direct alternative part comparisons - all confirmed from Vishay's official 88301 specification document.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its clamping action begins at VBR = 22.8–25.2 V and limits transient voltages to ≤33.2 V at 45.2 A (10/1000 µs waveform), enabling robust protection of downstream MOSFETs and ICs against ESD, load dump, and inductive switching events.
The device is rated for 1500 W peak pulse power with 0.01 % duty cycle, dissipates 6.5 W continuously on an infinite heatsink at TL = 75 °C, and supports 200 A non-repetitive forward surge current (8.3 ms half-sine). Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and the epoxy case meets UL 94 V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V - Ensures reliable conduction onset above normal operating voltage while avoiding false triggering. |
| VWM | 20.5 V - Maximum continuous reverse working voltage; defines safe DC operating margin before leakage rises. |
| VC @ IPPM | 33.2 V at 45.2 A - Clamped voltage during worst-case 10/1000 µs surge; determines maximum stress on protected circuitry. |
| PPPM | 1500 W - Peak transient energy absorption capability; enables protection against high-energy transients like ISO 7637-2 Pulse 5a. |
| IFSM | 200 A - Single half-sine surge current rating (8.3 ms); validates survivability under automotive load-dump events. |
| TJ max. | +175 °C - High-temperature operation support for under-hood automotive and industrial environments. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; informs PCB copper area requirements for sustained power dissipation. |
Pinout & Package
Package: Case Style 1.5KE - molded epoxy body with axial leads, 0.375" (9.5 mm) lead length, UL 94 V-0 compliant. Dimensions: 1.0" × 1.0" × 0.210" (25.4 mm × 25.4 mm × 5.3 mm) max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-side reference; completes clamping loop during positive transients. |
| Cathode | Reverse-biased terminal / protected line connection | Connected to the line being protected (e.g., 24 V rail); color band denotes cathode end per JEDEC standard. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable VBR tolerance (±5 %) and long-term reliability 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 when properly mounted with low-inductance layout. |
| Sub-nanosecond response time | Clamps transients before sensitive components experience damaging overvoltage - critical for protecting fast-switching MOSFET gates. |
| Low incremental surge resistance | Minimizes VC overshoot during high di/dt events, improving clamping precision for narrow-voltage-margin systems. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets JESD 201 Class 1A whisker resistance; suitable for automated assembly and consumer/industrial applications. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V vehicle battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and chassis ground to clamp surges up to 120 V. Use Value: Limits clamped voltage to 33.2 V, preventing damage to 36 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: TVS installed at connector entry point to shunt induced lightning surges (IEC 61000-4-5) on 4–20 mA loops. Use Value: Sub-ns response ensures clamping occurs before 100 ns rise-time transients exceed sensor IC absolute maximum ratings. |
| Consumer Power Adapter Output Protection | Telecom DC Power Distribution |
Use Scenario: Secondary-side overvoltage suppression in 12 V/5 V AC-DC adapters for smart home hubs. IC Role / Device Role / Timing Role: Unidirectional TVS connected across output capacitor to absorb flyback spikes from transformer leakage inductance. Use Value: 1500 W rating handles repetitive switching surges without degradation; 20.5 V VWM avoids conduction during normal 12 V ±10 % regulation. |
Use Scenario: Board-level protection of -48 V telecom power feeds against hot-swap and cable discharge events. IC Role / Device Role / Timing Role: TVS placed at PSE (Power Sourcing Equipment) input to limit transient propagation into backplane regulators. Use Value: 175 °C max junction temperature allows operation in sealed, high-ambient telecom cabinets without derating. |
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 | Lower peak power (600 W), smaller SMB package (vs. axial 1.5KE), VC = 38.9 V @ 15.4 A. | Better suited for space-constrained PCBs; insufficient for 1500 W surge events like automotive load dump. | Select SMBJ24A only when board area is critical and surge energy is limited to IEC 61000-4-5 Level 2 (2 kV). |
| 1.5KE24CA | Bidirectional variant; identical VBR, VWM, and PPPM, but symmetric clamping for AC-coupled or floating lines. | Required for differential signal lines (e.g., RS-485), Ethernet PHY interfaces, or any application where polarity reversal may occur. | Choose 1.5KE24CA instead of 1.5KE24A-E3/54 only when bidirectional clamping is mandated by signal topology or safety standards. |
Compared with SMBJ24A and 1.5KE24CA, the 1.5KE24A-E3/54 uniquely balances high-energy handling (1500 W), axial through-hole mechanical robustness, and cost-effective commercial-grade qualification - making it optimal for fixed-position, high-surge industrial and automotive power rail protection where board real estate is not constrained.
Availability
1.5KE24A-E3/54 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom DC feed protection requiring stable component supply, consistent RoHS compliance, and traceable lot-level documentation.
Supply support for 1.5KE24A-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 series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure due to voltage surges must be eliminated.
FAQ
What is the breakdown voltage range of the 1.5KE24A-E3/54?
The 1.5KE24A-E3/54 has a guaranteed breakdown voltage (VBR) range of 22.8 V to 25.2 V at 1.0 mA test current, per Vishay Document 88301. This tight tolerance ensures predictable clamping onset and compatibility with 24 V nominal systems. The 1.5KE24A-E3/54 maintains this specification across its full operating temperature range (-55 °C to +175 °C) without drift beyond datasheet limits.
Does the 1.5KE24A-E3/54 meet automotive qualification standards?
No - the 1.5KE24A-E3/54 is a commercial-grade part (E3 suffix) and is not AEC-Q101 qualified. Vishay offers the 1.5KE24AHE3_B variant for automotive use, which carries AEC-Q101 certification. The 1.5KE24A-E3/54 is intended for industrial, telecom, and consumer applications where extended temperature operation (+175 °C) is required but formal automotive qualification is not mandated.
What is the clamping voltage of the 1.5KE24A-E3/54 under a 10/1000 µs surge?
At its rated peak pulse current of 45.2 A (10/1000 µs waveform), the 1.5KE24A-E3/54 clamps to a maximum of 33.2 V. This value is measured per Figure 7 in Vishay Document 88301 and represents the upper limit of voltage seen by protected circuitry during standardized surge testing - critical for verifying margin against downstream component absolute maximum ratings.
Can the 1.5KE24A-E3/54 be used in bidirectional signal protection?
No - the 1.5KE24A-E3/54 is unidirectional only, with cathode marked by a color band. For bidirectional protection (e.g., RS-485, USB, or AC-coupled lines), the 1.5KE24CA variant must be used. Using the 1.5KE24A-E3/54 in reverse-biased configurations risks permanent breakdown and failure, as it lacks symmetrical avalanche characteristics in the forward direction.
What packaging format is supplied for the 1.5KE24A-E3/54?
The 1.5KE24A-E3/54 is supplied in 13" diameter paper tape and reel packaging, with a base quantity of 1400 units per reel (ordering code /54). Lead finish is matte tin, compliant with J-STD-002 and JESD 22-B102, and the E3 suffix confirms RoHS compliance and JESD 201 Class 1A whisker resistance - suitable for lead-free reflow and wave soldering processes.
1.5KE24A-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):
- 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
1.5KE24A-E3/54 FAQ
1.How can I place an order for 1.5KE24A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE24A-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 1.5KE24A-E3/54 reliable?
The price and inventory of 1.5KE24A-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 1.5KE24A-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE24A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE24A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE24A-E3/54?
1.5KE24A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE24A-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 1.5KE24A-E3/54?
For technical support, including 1.5KE24A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE24A-E3/54 requirements.
6.How does Aetrix verify that 1.5KE24A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE24A-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 1.5KE24A-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE24A-E3/54?
All 1.5KE24A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE24A-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 1.5KE24A-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE24A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE24A-E3/54 Tags
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