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Vishay General Semiconductor - Diodes Division 1.5KE24CA-E3/51
- Part No.:
- 1.5KE24CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE24CA-E3/51.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,627
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Product details
Overview
1.5KE24CA-E3/51 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge 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 spikes in industrial and automotive systems.
For engineers reviewing the 1.5KE24CA-E3/51 datasheet, 1.5KE24CA-E3/51 pinout, 1.5KE24CA-E3/51 application, or 1.5KE24CA-E3/51 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, JEDEC 1.5KE package details, thermal resistance (RθJA = 75 °C/W), and RoHS-compliant commercial-grade sourcing - all confirmed from Vishay's official 88301 specification document.
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 both polarities without polarity marking, supporting AC line and differential signal protection without external circuit inversion.
It sustains 1500 W peak pulse power under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, and derates linearly above 25 °C ambient per Fig. 2. The 33.2 V clamping voltage at 45.2 A IPPM ensures robust overvoltage limiting for 24 V nominal systems while maintaining low leakage (<1.0 µA at 20.5 V VWM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V at 1.0 mA - defines precise clamping onset threshold for bidirectional surge events |
| VWM | 20.5 V - maximum continuous working voltage before leakage exceeds 1.0 µA; sets safe operating margin below system rail |
| VC @ IPPM | 33.2 V at 45.2 A - actual clamped voltage during full 1500 W transient, critical for downstream component survivability |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform, enabling protection against severe lightning surges |
| TJ range | –55 °C to +175 °C - wide junction temperature range supports under-hood automotive and industrial environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient; informs heatsinking requirements for sustained surge duty |
| IFSM | Not applicable - bidirectional configuration lacks forward surge rating; only unidirectional variants specify 200 A IFSM |
| Capacitance | Not specified in datasheet for 1.5KE24CA-E3/51 - no typical CJ value provided at 1 MHz or rated VR |
Pinout & Package
Package: JEDEC-standard Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, RoHS compliant (E3 suffix), lead-free, and qualified per JESD 201 Class 1A whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bidirectional terminal pair | No polarity marking; symmetric conduction in both directions - simplifies PCB layout for AC or floating signal lines |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable breakdown characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly implemented with series impedance |
| Clamping ratio VC/VBR ≈ 1.46 | Indicates efficient voltage limiting - lower ratio improves protection margin for 24 V logic and power stages |
| Response time < 1 ns | Acts before most semiconductor damage mechanisms initiate, protecting sensitive gate oxides and analog front-ends |
| Operating TJ up to +175 °C | Validates use in engine control units, motor drives, and other high-temperature industrial enclosures |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protecting gate drivers and current-sense amplifiers from inductive kickback during MOSFET switching in 24 V DC motor controllers. IC Role / Device Role: Bidirectional TVS placed across power rails and signal inputs to clamp transients before they reach sensitive analog and digital ICs. Use Value: Limits voltage excursions to ≤33.2 V during 45.2 A surges, preventing latch-up or gate oxide rupture in 30 V-rated FETs and op-amps. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins against load dump and jump-start transients in vehicle body electronics. IC Role / Device Role: Primary surge suppression element on 12 V/24 V supply lines and bidirectional data lines, leveraging symmetry for polarity-agnostic protection. Use Value: Maintains functional integrity during ISO 7637-2 Pulse 5a (load dump) by clamping within spec-defined limits without requiring directional orientation. |
| Telecom Power Feeds | Industrial Sensor Signal Conditioning |
Use Scenario: Shielding PoE-powered equipment front-ends from induced surges on outdoor copper cabling exposed to lightning proximity. IC Role / Device Role: Secondary-level TVS on DC input stage after primary MOV/GDT, providing precise low-clamp backup protection. Use Value: Delivers 33.2 V clamping at 45.2 A - compatible with 36 V-rated DC-DC converters and ensures compliance with ITU-T K.20/21 immunity requirements. |
Use Scenario: Protecting 4–20 mA current loop receivers and RTD/thermocouple amplifier inputs in factory automation PLC modules. IC Role / Device Role: Low-leakage (≤1.0 µA at 20.5 V) bidirectional suppressor across analog input terminals to prevent ESD and cable discharge events. Use Value: Preserves measurement accuracy by avoiding forward conduction or leakage-induced offset errors in precision µA-level signal paths. |
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 (vs. 1.5KE axial), higher VC/VBR ratio (1.53) | Better suited for space-constrained PCBs but requires derating for >600 W surge events | Select SMBJ24CA only if board area is critical and peak surge energy remains ≤600 W; verify thermal dissipation in confined layouts. |
| 1.5SMC24CA | Same PPPM (1500 W), SMC package (surface-mount), slightly higher VBR tolerance (22.8–25.2 V same), identical VC | Enables automated assembly and eliminates through-hole drilling; requires rework for legacy through-hole designs | Choose 1.5SMC24CA for new SMT-based designs where reflow compatibility and board density outweigh through-hole serviceability needs. |
Compared with 1.5KE24CA-E3/51, SMBJ24CA trades surge capacity for footprint reduction, while 1.5SMC24CA retains full 1500 W performance in a surface-mount format - making the latter a direct functional alternative for modern production, and the former a compromise for cost- or space-limited legacy upgrades.
Availability
1.5KE24CA-E3/51 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges and high-reliability surge environments.
Supply support for 1.5KE24CA-E3/51 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, TVS devices, and optoelectronics with emphasis on ruggedness, precision, and automotive qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting industrial automation, transportation, and infrastructure systems where reliability under repetitive surge stress is non-negotiable.
FAQ
What is the breakdown voltage tolerance for 1.5KE24CA-E3/51?
The 1.5KE24CA-E3/51 has a guaranteed breakdown voltage range of 22.8 V to 25.2 V at 1.0 mA test current, per Vishay Document 88301. This ±5% tolerance ensures consistent clamping onset across production lots and supports predictable system-level surge margin design. The value is measured bidirectionally and applies equally to both polarities.
Is 1.5KE24CA-E3/51 RoHS compliant and lead-free?
Yes, the "E3" suffix in 1.5KE24CA-E3/51 explicitly denotes RoHS compliance and lead-free construction per JEDEC standards. It meets JESD 201 Class 1A whisker testing and is manufactured with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No exemptions or Pb-containing materials are used.
Does 1.5KE24CA-E3/51 have AEC-Q101 qualification?
No, 1.5KE24CA-E3/51 is a commercial-grade part. AEC-Q101 qualification applies only to variants with the "HE3" suffix (e.g., 1.5KE24CAHE3_B). The E3/51 version lacks automotive qualification documentation and is intended for industrial, telecom, and general-purpose applications where extended temperature operation is required but automotive stress testing is not mandated.
What is the maximum clamping voltage of 1.5KE24CA-E3/51 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE24CA-E3/51 is 33.2 V at 45.2 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured across both directions and represents the upper limit of voltage seen by protected circuitry during worst-case transient events defined in IEC 61000-4-5.
Can 1.5KE24CA-E3/51 be used in AC line protection?
Yes, 1.5KE24CA-E3/51 is explicitly designed for bidirectional applications and is commonly deployed across AC mains inputs, transformer secondaries, and differential communication lines. Its symmetrical VBR and VC characteristics eliminate polarity concerns, and its 20.5 V stand-off voltage supports use on 24 V AC systems with appropriate series impedance to limit let-through current.
1.5KE24CA-E3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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-E3/51 FAQ
1.How can I place an order for 1.5KE24CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE24CA-E3/51 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-E3/51 reliable?
The price and inventory of 1.5KE24CA-E3/51 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-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE24CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE24CA-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE24CA-E3/51?
1.5KE24CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE24CA-E3/51 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-E3/51?
For technical support, including 1.5KE24CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE24CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE24CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE24CA-E3/51 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-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE24CA-E3/51?
All 1.5KE24CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE24CA-E3/51, 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-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE24CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE24CA-E3/51 Tags
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