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Vishay General Semiconductor - Diodes Division 1.5KE22CAHE3/51
- Part No.:
- 1.5KE22CAHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE22CAHE3/51.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,620
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Product details
Overview
1.5KE22CAHE3/51 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in signal and power lines. It features a 22 V breakdown voltage (VBR = 20.9–23.1 V at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 30.6 V at 49 A, and operates across –55 °C to +175 °C junction temperature. It is used in automotive sensor interfaces and industrial I/O protection where fast-response surge suppression is critical.
For engineers reviewing the 1.5KE22CAHE3/51 datasheet, 1.5KE22CAHE3/51 pinout, 1.5KE22CAHE3/51 application, or 1.5KE22CAHE3/51 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJL = 15.4 °C/W), RoHS-compliant HE3 packaging, and real-world design implications for transient immunity in 12 V/24 V systems.
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. Its symmetrical clamping behavior applies equally in both polarities, eliminating polarity marking on the case and simplifying layout in AC-coupled or floating signal paths.
It is rated for 1500 W peak pulse power under standardized 10/1000 µs waveform, with derating above 25 °C per Fig. 2 and maximum clamping voltage of 30.6 V at 49 A IPPM. The device meets JESD 201 Class 2 whisker resistance and is qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 20.9–23.1 V at 1 mA - defines minimum clamping threshold before conduction begins in either direction |
| Stand-off Voltage VWM | 18.8 V - maximum continuous reverse working voltage without significant leakage (≤1 µA) |
| Clamping Voltage VC | 30.6 V at 49 A IPPM - actual voltage seen by protected circuit during worst-case 10/1000 µs surge |
| Peak Pulse Power PPPM | 1500 W - sustains single 1 ms transients up to 49 A without failure; derates linearly above 25 °C |
| Junction Temperature Range | –55 °C to +175 °C - enables deployment in engine control units, motor drives, and industrial PLCs |
| Thermal Resistance RθJL | 15.4 °C/W - determines temperature rise from lead-to-junction under pulsed conditions; critical for PCB copper pour design |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including temperature cycling, HTRB, and ESD per AEC standard |
Pinout & Package
Package: Case Style 1.5KE - axial-lead DO-201AD molded epoxy package (10.16 mm length × 5.33 mm diameter), UL 94 V-0 rated, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional terminal pair | No polarity marking; terminals are interchangeable - connects across protected line and ground or between differential lines |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance (±5%) and long-term reliability under humidity and thermal stress |
| 1500 W peak pulse rating (10/1000 µs) | Protects against ISO 7637-2 Pulse 1/2a/5a surges and IEC 61000-4-5 Level 3 (1 kV/2 Ω) events |
| Sub-nanosecond response time | Clamps transients before sensitive ICs (e.g., CAN transceivers, ADC inputs) experience overstress |
| AEC-Q101 qualification | Validated for automotive use including 1000-cycle temperature cycling (–40 °C to +125 °C) and HTRB at 150 °C |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and supports lead-free reflow assembly up to 260 °C |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching spikes in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Bi-directional shunt clamp placed between signal line and chassis ground, operating as a voltage-triggered crowbar. Use Value: Limits transient excursions to ≤30.6 V, preventing latch-up or gate oxide rupture in downstream op-amps and microcontrollers. |
Use Scenario: Safeguarding PLC digital input modules connected to 24 V DC field wiring exposed to relay coil flyback and ESD events. IC Role / Device Role / Timing Role: Standoff-mode protector that remains non-conductive below 18.8 V and clamps within 1 ns when surges exceed 20.9 V. Use Value: Maintains signal integrity during normal operation while absorbing >1000 W surges - enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge). |
| Telecom Line Interface | Power Supply Input Stage |
Use Scenario: Shielding RS-485 transceiver pins in remote metering equipment from lightning-induced surges on long outdoor runs. IC Role / Device Role / Timing Role: Differential-mode suppressor mounted across A/B lines or common-mode across line-to-ground. Use Value: Symmetrical VBR ensures identical clamping in both directions - critical for bidirectional half-duplex buses. |
Use Scenario: Secondary-side overvoltage clamp on 24 V DC-DC converter output feeding FPGA or DSP power rails. IC Role / Device Role / Timing Role: Fast-acting secondary protection stage following primary MOV or fuse, limiting post-fault overshoot. Use Value: Low clamping ratio (VC/VBR = 1.32) minimizes voltage headroom loss - preserving regulation margin for downstream LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA | 600 W PPPM, SMC package (smaller footprint), lower IPPM (32.4 A), same VBR range | Better suited for space-constrained PCBs; lower energy handling limits use in high-surge environments | Select SMBJ22CA only if board area is constrained and surge threat level is ≤IEC 61000-4-5 Level 2 |
| 1.5KE22AHE3/51 | Uni-directional variant; includes cathode band marking; VF = 3.5 V at 100 A | Required only where DC bias or polarity-sensitive circuits demand unidirectional clamping | Choose 1.5KE22AHE3/51 only when protecting DC-biased lines (e.g., 5 V logic rails) where reverse conduction must be blocked |
Compared with SMBJ22CA and 1.5KE22AHE3/51, the 1.5KE22CAHE3/51 uniquely balances high-energy handling (1500 W), automotive qualification, and bi-directional symmetry - making it the preferred choice for unprotected AC-coupled or floating interfaces in harsh environments.
Availability
1.5KE22CAHE3/51 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and telecom line interface applications requiring stable component supply, AEC-Q101 traceability, and long-lifecycle support.
Supply support for 1.5KE22CAHE3/51 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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade validation.
The 1.5KE series was engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure - prioritizing ruggedness, repeatable clamping, and AEC-Q101 compliance from wafer to final test.
FAQ
What is the clamping voltage of the 1.5KE22CAHE3/51 under a 10/1000 µs surge?
The 1.5KE22CAHE3/51 clamps to a maximum of 30.6 V when subjected to its rated peak pulse current of 49 A (10/1000 µs waveform). This value is measured per JEDEC standards and represents the upper bound voltage imposed on the protected circuit during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5KE22CAHE3/51 suitable for automotive applications?
Yes, the 1.5KE22CAHE3/51 is AEC-Q101 qualified (per note 2 on page 3 of Vishay document 88301), covering temperature cycling, high-temperature reverse bias, and ESD testing. Its –55 °C to +175 °C operating range and HE3 suffix (JESD 201 Class 2 whisker resistance) make it appropriate for engine control, body electronics, and ADAS sensor modules.
How does the bi-directional nature of the 1.5KE22CAHE3/51 affect PCB layout?
The 1.5KE22CAHE3/51 has no polarity marking and identical electrical behavior in both directions, so orientation on the PCB is irrelevant. This simplifies placement in AC-coupled paths (e.g., RS-485, CAN FD), eliminates risk of reverse installation, and allows use across differential pairs without concern for anode/cathode assignment.
What is the thermal resistance from junction to lead (RθJL) for the 1.5KE22CAHE3/51?
The 1.5KE22CAHE3/51 has a typical junction-to-lead thermal resistance of 15.4 °C/W, as specified in the Thermal Characteristics table (page 3). This parameter governs temperature rise during repetitive pulses and informs heatsinking requirements - especially important when multiple surges occur in quick succession in industrial controls.
Does the 1.5KE22CAHE3/51 meet RoHS and lead-free assembly requirements?
Yes, the HE3 suffix denotes full RoHS compliance and qualification for lead-free reflow soldering (up to 260 °C peak), including JESD 201 Class 2 whisker resistance. The matte tin-plated leads comply with J-STD-002 and JESD 22-B102, supporting reliable solder joint formation in modern SMT processes.
1.5KE22CAHE3/51 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):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 49A
- 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
1.5KE22CAHE3/51 FAQ
1.How can I place an order for 1.5KE22CAHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE22CAHE3/51 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 1.5KE22CAHE3/51 reliable?
The price and inventory of 1.5KE22CAHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE22CAHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE22CAHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE22CAHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE22CAHE3/51?
1.5KE22CAHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE22CAHE3/51 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 1.5KE22CAHE3/51?
For technical support, including 1.5KE22CAHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE22CAHE3/51 requirements.
6.How does Aetrix verify that 1.5KE22CAHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE22CAHE3/51 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 1.5KE22CAHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE22CAHE3/51?
All 1.5KE22CAHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE22CAHE3/51, 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 1.5KE22CAHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE22CAHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE22CAHE3/51 Tags
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