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Vishay General Semiconductor - Diodes Division 1.5KE24CA-E3/73
- Part No.:
- 1.5KE24CA-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE24CA-E3/73.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,585
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Product details
Overview
1.5KE24CA-E3/73 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 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 33.2 V at 45.2 A, ±5% VBR tolerance, and operates across –55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE24CA-E3/73 datasheet, 1.5KE24CA-E3/73 pinout, 1.5KE24CA-E3/73 application, or 1.5KE24CA-E3/73 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, JEDEC 1.5KE package details, RoHS-compliant commercial-grade construction, and real-world protection use cases - all confirmed from Vishay's official 88301 specification document.
Technical Context
This device functions as a silicon avalanche diode with glass-passivated junction, enabling sub-nanosecond response (<1 ns) to transient overvoltages. Its bidirectional configuration allows symmetrical clamping in AC-coupled or floating circuits without polarity concerns, and it complies with ANSI/IEEE C62.35 surge waveform standards.
The 1.5KE24CA-E3/73 sustains 1500 W peak pulse power under 10/1000 µs waveform at 0.01% duty cycle, with thermal resistance of 15.4 °C/W (junction-to-lead) and 75 °C/W (junction-to-ambient). It exhibits low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.46), critical for minimizing let-through energy during ESD or surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V at 1 mA - defines precise avalanche onset threshold for reliable, repeatable clamping initiation |
| VWM | 20.5 V - maximum continuous working voltage before leakage exceeds 1 µA; sets safe operating margin below VBR |
| VC @ IPPM | 33.2 V at 45.2 A - clamped voltage during full 1500 W surge; determines protected circuit's maximum stress level |
| PPPM | 1500 W (10/1000 µs) - peak surge handling capacity; enables protection against IEC 61000-4-5 Level 4 surges |
| IPPM | 45.2 A - peak pulse current capability; directly supports high-energy transient suppression in industrial power rails |
| TJ range | –55 °C to +175 °C - wide junction temperature range ensures reliability in under-hood automotive and industrial environments |
| Package | JEDEC DO-201AD (1.5KE case) - industry-standard axial-leaded package with 0.375" lead length; compatible with through-hole PCB assembly |
Pinout & Package
Package: JEDEC DO-201AD (1.5KE case), molded epoxy body, matte tin-plated leads, RoHS-compliant (E3 suffix), UL 94 V-0 rated. Bidirectional symmetry means no anode/cathode marking; both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Transient current entry point (bidirectional) | Accepts surge current in either polarity; no polarity dependency due to symmetrical avalanche structure |
| Cathode (Lead 2) | Transient current exit point (bidirectional) | Completes low-impedance path to ground or return rail during clamping; identical role to Lead 1 in reverse polarity event |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, low-drift VBR over lifetime and temperature; eliminates surface contamination effects on avalanche uniformity |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-earth) without derating in standard PCB layouts |
| Sub-nanosecond response time | Clamps transients within <1 ns - faster than MOVs or polymer-based protectors - preserving signal integrity in high-speed interfaces |
| Bidirectional CA configuration | Enables single-device protection of AC lines, differential buses (e.g., RS-485), or floating DC rails without external polarity management |
| AEC-Q101 qualification option (HE3 variant) | Available in automotive-grade version (1.5KE24CAHE3_B); not applicable to E3/73, but confirms family-level reliability validation path |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O against back-EMF spikes from relay and solenoid switching in PLCs and VFDs. IC Role / Device Role / Timing Role: Standoff-mode TVS placed across power rails or signal inputs; clamps transients before they reach sensitive logic or power stages. Use Value: Prevents latch-up and permanent damage to 3.3 V/5 V MCUs and isolated gate drivers by limiting let-through voltage to ≤33.2 V during 45 A surges. | Use Scenario: Shielding LIN bus transceivers and sensor supply lines from load dump and jump-start transients in vehicle door modules and lighting controllers. IC Role / Device Role / Timing Role: Bidirectional shunt protector on 12 V supply and data lines; responds symmetrically to positive/negative voltage excursions. Use Value: Maintains communication integrity during 12 V system surges up to ±100 V by clamping within 33.2 V while surviving repetitive 1500 W pulses. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
Use Scenario: Safeguarding PoE-powered Ethernet PHYs and DC-DC converters against induced lightning surges on outdoor telecom line cards. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side 48 V distribution rails; coordinated with upstream GDT or MOV for staged protection. Use Value: Limits surge energy delivered to downstream regulators to <10 mJ per event, preventing thermal runaway in buck converter ICs. | Use Scenario: Protecting touch controller inputs and display backlight drivers in washing machines and HVAC systems exposed to ESD and relay noise. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) TVS on front-panel buttons and sensor traces; placed adjacent to IC pins for shortest possible path. Use Value: Absorbs >15 kV HBM ESD strikes without degradation, maintaining long-term reliability in high-humidity appliance environments. |
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 peak power (600 W), smaller SMB package (surface-mount), higher VC/VBR ratio (1.52 vs. 1.46) | Better suited for space-constrained PCBs; less effective for high-energy surges requiring >1 kW dissipation | Select SMBJ24CA only when board area is critical and surge threat level is ≤IEC 61000-4-5 Level 3. |
| 1.5KE24A-E3/73 | Unidirectional variant; same VBR, VC, and PPPM, but requires correct polarity placement and includes cathode band marking | Applicable only in DC-biased circuits where polarity is fixed and reverse conduction must be blocked | Choose 1.5KE24A-E3/73 if protecting unidirectional power rails (e.g., +24 V supply) and polarity-aware layout is acceptable. |
Compared with SMBJ24CA and 1.5KE24A-E3/73, the 1.5KE24CA-E3/73 uniquely delivers bidirectional 1500 W surge handling in a through-hole package - making it optimal for high-reliability industrial and automotive applications where polarity independence and mechanical robustness are required.
Availability
1.5KE24CA-E3/73 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 manufacturability.
Supply support for 1.5KE24CA-E3/73 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, precision, and high-power capability.
The 1.5KE series was engineered for ruggedized transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and infrastructure equipment where failure resilience and surge immunity are non-negotiable.
FAQ
What is the breakdown voltage tolerance for 1.5KE24CA-E3/73?
The 1.5KE24CA-E3/73 has a guaranteed breakdown voltage range of 22.8 V to 25.2 V at 1 mA test current, corresponding to ±5% tolerance around the nominal 24 V rating. This tight tolerance ensures consistent clamping behavior across production lots and supports predictable system-level surge margin calculations without overspecifying protection components.
Is 1.5KE24CA-E3/73 RoHS compliant and lead-free?
Yes, the 1.5KE24CA-E3/73 carries the "E3" suffix, which denotes full RoHS compliance per Directive 2011/65/EU and JESD201 Class 1A whisker testing. The matte tin-plated leads meet J-STD-002 solderability requirements, and the molded epoxy body satisfies UL 94 V-0 flammability standards - confirming suitability for environmentally regulated commercial electronics.
How does the clamping voltage of 1.5KE24CA-E3/73 compare to its breakdown voltage?
The 1.5KE24CA-E3/73 clamps at 33.2 V when subjected to its rated 45.2 A peak pulse current (10/1000 µs), yielding a clamping ratio (VC/VBR) of approximately 1.46. This low ratio reflects efficient avalanche conduction and minimal incremental surge resistance - critical for limiting let-through energy to downstream 24 V-rated ICs and ensuring robust system-level surge immunity.
Can 1.5KE24CA-E3/73 be used in automotive applications?
The 1.5KE24CA-E3/73 is a commercial-grade part; however, Vishay offers the functionally identical 1.5KE24CAHE3_B variant qualified to AEC-Q101 for automotive use. While the E3/73 itself is not AEC-Q101 certified, its 175 °C max junction temperature, glass-passivated junction, and robust surge ratings make it suitable for non-safety-critical automotive subsystems - provided customer qualification is performed per application requirements.
What is the thermal resistance of 1.5KE24CA-E3/73 and how does it affect power handling?
The 1.5KE24CA-E3/73 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W and junction-to-ambient (RθJA) of 75 °C/W. At 25 °C ambient, this allows 6.5 W continuous power dissipation on an infinite heatsink (TL = 75 °C), but limits sustained operation under surge conditions unless PCB copper area or airflow is optimized - underscoring its design intent for transient, not steady-state, power absorption.
1.5KE24CA-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- 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-E3/73 FAQ
1.How can I place an order for 1.5KE24CA-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE24CA-E3/73 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-E3/73 reliable?
The price and inventory of 1.5KE24CA-E3/73 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-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE24CA-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE24CA-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE24CA-E3/73?
1.5KE24CA-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE24CA-E3/73 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-E3/73?
For technical support, including 1.5KE24CA-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE24CA-E3/73 requirements.
6.How does Aetrix verify that 1.5KE24CA-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE24CA-E3/73 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-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE24CA-E3/73?
All 1.5KE24CA-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE24CA-E3/73, 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-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE24CA-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE24CA-E3/73 Tags
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