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Vishay General Semiconductor - Diodes Division 1.5KE24CAHE3/51
- Part No.:
- 1.5KE24CAHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE24CAHE3/51.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,802
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Product details
Overview
1.5KE24CAHE3/51 from Vishay General Semiconductor is a bi-directional 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 IT = 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 junction temperature range - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5KE24CAHE3/51 datasheet, 1.5KE24CAHE3/51 pinout, 1.5KE24CAHE3/51 application, or 1.5KE24CAHE3/51 equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, clamping performance under surge conditions, thermal resistance (RθJL = 15.4 °C/W), and RoHS-compliant HE3 packaging details - all critical for ESD/lightning transient design validation.
Technical Context
This bi-directional TVS diode uses a glass passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance, enabling effective clamping of fast transients induced by inductive switching or lightning surges. Its symmetrical bidirectional structure eliminates polarity concerns in AC-coupled or floating lines.
The device complies with AEC-Q101 for automotive applications and supports repetitive 10/1000 µs surge pulses at 0.01% duty cycle. With VWM = 20.5 V and IR ≤ 1.0 µA at rated standoff, it ensures minimal leakage during normal operation while maintaining tight VBR tolerance (±5%).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 22.8 V min / 25.2 V max at 1.0 mA test current - defines precise clamping onset threshold for bidirectional surge events |
| Standoff Voltage VWM | 20.5 V - maximum continuous working voltage before leakage exceeds 1.0 µA; sets safe operating margin below VBR |
| Peak Pulse Power PPPM | 1500 W (10/1000 µs waveform) - sustains high-energy transients without failure, critical for industrial surge immunity |
| Clamping Voltage VC | 33.2 V at 45.2 A IPPM - actual voltage seen by protected circuit during worst-case surge; enables downstream IC survival |
| Junction Temperature Range | –55 °C to +175 °C - supports under-hood automotive and high-temperature industrial environments without derating |
| Thermal Resistance RθJL | 15.4 °C/W - enables efficient heat transfer from junction to lead, supporting reliable operation at elevated ambient temperatures |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, humidity bias, and HTRB testing |
Pinout & Package
Package: Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, RoHS compliant, and qualified per JESD 201 Class 2 whisker test (HE3 suffix). No polarity marking on bi-directional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge conduction path | Both terminals function identically - no cathode band; connects across protected line and return (e.g., CAN_H/CAN_L or RS-485 A/B) |
| Case / Body | Non-electrical mechanical interface | Epoxy encapsulation provides environmental sealing and mechanical stability; no thermal or electrical connection to case |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without degradation when properly mounted |
| Sub-nanosecond response time | Clamps transients within <1 ns - faster than MOVs or GDTs, preserving signal integrity in high-speed interfaces |
| AEC-Q101 qualification | Validated for automotive use including engine control units, ADAS sensors, and infotainment power rails |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage stress on downstream components compared to higher-ratio protectors |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role: Bi-directional transient clamp placed across sensor supply and ground, shunting surge energy before it reaches precision ADC or op-amp inputs. Use Value: Maintains VWM = 20.5 V margin below nominal 24 V supply while clamping to 33.2 V - preventing latch-up or gate oxide damage in connected ASICs. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs subjected to EFT bursts and lightning-induced common-mode surges. IC Role / Device Role: Paired devices (one per line) referenced to local ground, absorbing asymmetrical transients on RS-485 A/B lines. Use Value: Symmetrical clamping ensures balanced voltage excursion during fast common-mode events, preserving receiver common-mode rejection ratio (CMRR). |
| Consumer Power Adapter Input | Telecom DSL Line Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters after rectification, guarding against transformer flyback spikes and capacitor discharge transients. IC Role / Device Role: Parallel-connected TVS across DC output rails (e.g., +12 V and GND), triggered only during abnormal overvoltage events. Use Value: 1500 W rating handles repetitive 10/1000 µs surges from poor-quality mains input; RθJL = 15.4 °C/W allows direct PCB copper pour heatsinking without external heatsink. |
Use Scenario: Primary protection stage on POTS/DSL line cards, intercepting longitudinal surges from outside plant wiring before hybrid transformers. IC Role / Device Role: Bidirectional clamp between tip/ring and ground, meeting GR-1089-CORE lightning surge requirements (10/700 µs waveform). Use Value: VBR = 22.8–25.2 V aligns with typical DSL line operating voltages (≈24 V DC bias), ensuring no false triggering during normal mode operation. |
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. DO-201AB), higher VC/IPPM ratio (38.9 V @ 15.7 A) | Better suited for space-constrained consumer electronics; insufficient for industrial 4 kV surge compliance | Select when board area is critical and surge energy is limited to IEC 61000-4-5 Level 2 (1 kV) |
| 1.5KE24AHE3/51 | Uni-directional variant with cathode band marking; identical VBR, VWM, and PPPM but asymmetric conduction | Required only where DC-biased lines need unidirectional clamping (e.g., single-supply microcontroller I/O) | Choose only if polarity is fixed and reverse conduction must be blocked - otherwise 1.5KE24CAHE3/51 offers greater design flexibility |
Compared with SMBJ24CA, 1.5KE24CAHE3/51 delivers 2.5× higher surge energy handling and lower clamping voltage per amp, making it suitable for harsher environments; versus 1.5KE24AHE3/51, its bi-directionality simplifies layout on AC-coupled or floating buses without polarity verification.
Availability
1.5KE24CAHE3/51 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 networks, and telecom line interface designs requiring stable component supply, AEC-Q101 qualification, and 1500 W surge resilience.
Supply support for 1.5KE24CAHE3/51 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5KE series was engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure - delivering consistent clamping behavior and AEC-Q101 validation across voltage grades from 6.8 V to 440 V.
FAQ
What is the breakdown voltage tolerance for 1.5KE24CAHE3/51?
The 1.5KE24CAHE3/51 has a specified breakdown voltage range of 22.8 V minimum to 25.2 V maximum at 1.0 mA test current, representing a ±5% tolerance around the nominal 24 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for protecting voltage-sensitive circuits without premature triggering.
Is 1.5KE24CAHE3/51 suitable for automotive applications?
Yes, 1.5KE24CAHE3/51 is AEC-Q101 qualified and explicitly listed in Vishay's documentation for automotive-grade use. Its –55 °C to +175 °C operating range, glass passivated junction, and validation across temperature cycling, humidity bias, and high-temperature reverse bias tests make it appropriate for engine control modules, body electronics, and ADAS sensor interfaces.
How does the clamping voltage of 1.5KE24CAHE3/51 compare to its breakdown voltage?
The 1.5KE24CAHE3/51 clamps to 33.2 V at its rated peak pulse current of 45.2 A (10/1000 µs), yielding a clamping ratio (VC/VBR) of approximately 1.46. This low ratio indicates highly effective voltage limiting - meaning protected circuits experience only ~46% overvoltage above VBR during worst-case surge events, reducing stress on downstream ICs.
What is the meaning of the HE3 suffix in 1.5KE24CAHE3/51?
The HE3 suffix in 1.5KE24CAHE3/51 denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It replaces older non-RoHS or commercial-grade versions (e.g., E3-only), confirming suitability for automotive and high-reliability industrial use where tin whisker mitigation and environmental compliance are mandatory.
Can 1.5KE24CAHE3/51 be used in parallel to increase surge handling capacity?
Yes, 1.5KE24CAHE3/51 can be paralleled to increase total peak pulse power capability, but matching VBR tolerances (±5%) and using symmetric PCB layout with equal trace lengths is essential to ensure current sharing. Vishay's application notes confirm this configuration for systems requiring >1500 W protection, such as telecom central office equipment or railway signaling interfaces.
1.5KE24CAHE3/51 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE24CAHE3/51 FAQ
1.How can I place an order for 1.5KE24CAHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE24CAHE3/51 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 1.5KE24CAHE3/51 reliable?
The price and inventory of 1.5KE24CAHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE24CAHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE24CAHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE24CAHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE24CAHE3/51?
1.5KE24CAHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE24CAHE3/51 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 1.5KE24CAHE3/51?
For technical support, including 1.5KE24CAHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE24CAHE3/51 requirements.
6.How does Aetrix verify that 1.5KE24CAHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE24CAHE3/51 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 1.5KE24CAHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE24CAHE3/51?
All 1.5KE24CAHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE24CAHE3/51, 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 1.5KE24CAHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE24CAHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE24CAHE3/51 Tags
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