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Vishay General Semiconductor - Diodes Division 1.5KE16CAHE3/51
- Part No.:
- 1.5KE16CAHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE16CAHE3/51.pdf
- Description:
- TVS DIODE 13.6VWM 22.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,377
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Product details
Overview
1.5KE16CAHE3/51 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 16 V breakdown voltage (VBR = 15.2–16.8 V at IT = 1.0 mA), 13.6 V maximum stand-off voltage (VWM), 22.5 V clamping voltage (VC) at 66.7 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the 1.5KE16CAHE3/51 datasheet, 1.5KE16CAHE3/51 pinout, 1.5KE16CAHE3/51 application, or 1.5KE16CAHE3/51 equivalent, this part delivers AEC-Q101-qualified transient immunity for bi-directional AC-coupled or floating circuits where fast response (<1 ns), low clamping ratio (VC/VWM ≈ 1.66), and stable thermal performance up to +175 °C junction temperature are required.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction enables low incremental surge resistance and excellent clamping consistency under repetitive 10/1000 µs transients at 0.01% duty cycle.
The device uses a molded epoxy case (Case Style 1.5KE) with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability rating. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification per notes on pages 2–3 of document 88301.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 15.2 V / 16.8 V at 1.0 mA test current - defines precise voltage threshold where clamping initiates reliably |
| VWM | 13.6 V maximum - ensures no conduction during normal operation, preserving signal integrity |
| VC @ IPPM | 22.5 V at 66.7 A - limits protected circuit voltage during worst-case 1500 W transient |
| PPPM | 1500 W with 10/1000 µs waveform - sustains high-energy surges common in automotive load dump or lightning-induced events |
| Junction Temp Range | –55 °C to +175 °C - supports under-hood and industrial environments without derating loss |
| Leakage @ VWM | 1.0 µA maximum - negligible standby current impact on low-power sensor or interface circuits |
| Response Time | <1 ns - clamps before sensitive ICs (e.g., CAN transceivers, ADCs) experience damage |
Pinout & Package
Package: Case Style 1.5KE - axial-leaded DO-201AD molded epoxy package (1.0" × 0.285", 25.4 mm × 7.2 mm), UL 94 V-0 rated, with matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bi-directional) | Transient current path (symmetrical) | No polarity marking; terminals interchangeable - enables placement on AC lines or floating nodes without orientation concern |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges without degradation when properly mounted |
| Low clamping ratio (VC/VWM = 1.66) | Minimizes overvoltage exposure to downstream ICs while maintaining margin above VWM |
| JESD 201 Class 2 whisker resistance | HE3 suffix confirms lead finish resists tin whisker growth - critical for high-reliability industrial and automotive PCBs |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional clamping element placed across sensor supply and ground, absorbing transients before they reach precision amplifier or ADC inputs. Use Value: Maintains signal fidelity by limiting voltage excursion to ≤22.5 V during 10/1000 µs surges up to 66.7 A - preventing latch-up or parametric shift in 3.3 V/5 V sensor front-ends. |
Use Scenario: Shielding 24 V DC digital input modules in programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Primary overvoltage clamp on channel-level inputs, installed before optocoupler or Schmitt trigger conditioning stages. Use Value: Enables reliable operation under IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) testing due to sub-nanosecond response and 1500 W energy handling. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs connected to outdoor cabling susceptible to lightning-induced surges. IC Role / Device Role / Timing Role: First-line bi-directional suppressor on differential bus lines (e.g., A/B pins), paired with common-mode chokes. Use Value: Symmetric clamping prevents data corruption during ±22.5 V transients - preserving signal integrity without requiring polarity-aware layout. |
Use Scenario: Secondary-side overvoltage protection on 12 V/19 V DC output rails of wall adapters used in laptops and monitors. IC Role / Device Role / Timing Role: Standoff-rated clamp across output capacitor, triggered only during fault conditions like regulator failure or cable short. Use Value: Limits output voltage to 22.5 V during overvoltage events, protecting downstream USB-PD controllers and display drivers from destructive overvoltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16CA | Lower PPPM (600 W), smaller SMB package (surface-mount), lower IPPM (32.9 A), same VBR range (15.2–16.8 V) | Better suited for space-constrained PCBs; less robust for high-energy surges like automotive load dump | Select when board area is limited and surge energy is ≤600 W; verify thermal relief for continuous power dissipation |
| 1.5KE16CA | Same electrical specs but lacks HE3 suffix - commercial grade only, not AEC-Q101 qualified or JESD 201 Class 2 whisker tested | Acceptable for non-automotive industrial or consumer use where qualification and long-term whisker resistance are not mandated | Choose for cost-sensitive designs outside automotive or high-reliability industrial programs |
Compared with 1.5KE16CAHE3/51, SMBJ16CA trades surge robustness for compactness, while 1.5KE16CA omits automotive qualification and enhanced lead finish - making 1.5KE16CAHE3/51 the sole option meeting AEC-Q101, JESD 201 Class 2, and 1500 W requirements simultaneously.
Availability
1.5KE16CAHE3/51 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5KE16CAHE3/51 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 high-reliability diodes, MOSFETs, and passive components for demanding industrial, automotive, and computing applications.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - delivering consistent clamping performance, AEC-Q101 validation, and robust packaging for under-hood and factory-floor deployment.
FAQ
What is the breakdown voltage tolerance of the 1.5KE16CAHE3/51?
The 1.5KE16CAHE3/51 has a specified breakdown voltage range of 15.2 V to 16.8 V at 1.0 mA test current, representing ±5.0% tolerance around the nominal 16 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for protecting 12 V and 15 V rail systems without false triggering.
Is the 1.5KE16CAHE3/51 suitable for automotive applications?
Yes - the 1.5KE16CAHE3/51 carries the HE3 suffix, confirming it is RoHS-compliant and AEC-Q101 qualified per Vishay document 88301, page 2, note (2). It is explicitly approved for automotive use in sensor interfaces, body control modules, and infotainment power rails where transient immunity and long-term reliability are mandatory.
How does the 1.5KE16CAHE3/51 differ from uni-directional variants like 1.5KE16AHE3/51?
The 1.5KE16CAHE3/51 is bi-directional (denoted by "CA"), providing symmetrical clamping for AC-coupled or floating circuits, whereas 1.5KE16AHE3/51 is uni-directional with cathode band marking and higher forward voltage (VF = 3.5 V at 100 A). Use 1.5KE16CAHE3/51 where polarity is undefined or bidirectional transients occur - e.g., RS-485 lines or transformer-coupled interfaces.
What is the maximum clamping voltage of the 1.5KE16CAHE3/51 under surge conditions?
The 1.5KE16CAHE3/51 clamps to a maximum of 22.5 V when subjected to its rated peak pulse current of 66.7 A (10/1000 µs waveform). This value is measured per JEDEC standards and guarantees that downstream components see no more than 22.5 V during worst-case transient events - essential for safeguarding 3.3 V, 5 V, and 12 V ICs.
Does the 1.5KE16CAHE3/51 require heatsinking for standard operation?
No external heatsink is required for transient suppression duty cycles (e.g., single 10/1000 µs pulses at ≤0.01% duty cycle), as energy dissipation is brief and localized. However, for repetitive surges or sustained power dissipation, thermal design must account for RθJA = 75 °C/W and RθJL = 15.4 °C/W - verified using Vishay's Fig. 5 derating curve in document 88301. The 1.5KE16CAHE3/51 itself remains within safe operating limits under typical surge profiles.
1.5KE16CAHE3/51 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):
- 13.6V
- Voltage - Breakdown (Min):
- 15.2V
- Voltage - Clamping (Max) @ Ipp:
- 22.5V
- Current - Peak Pulse (10/1000µs):
- 66.7A
- 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
1.5KE16CAHE3/51 FAQ
1.How can I place an order for 1.5KE16CAHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE16CAHE3/51 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 1.5KE16CAHE3/51 reliable?
The price and inventory of 1.5KE16CAHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE16CAHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE16CAHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE16CAHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE16CAHE3/51?
1.5KE16CAHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE16CAHE3/51 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 1.5KE16CAHE3/51?
For technical support, including 1.5KE16CAHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE16CAHE3/51 requirements.
6.How does Aetrix verify that 1.5KE16CAHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE16CAHE3/51 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 1.5KE16CAHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE16CAHE3/51?
All 1.5KE16CAHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE16CAHE3/51, 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 1.5KE16CAHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE16CAHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE16CAHE3/51 Tags
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