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Vishay General Semiconductor - Diodes Division 1.5KE22CA-E3/51
- Part No.:
- 1.5KE22CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE22CA-E3/51.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,906
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Product details
Overview
1.5KE22CA-E3/51 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on 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), 30.6 V maximum clamping voltage at 49 A, and operates across –55 °C to +175 °C junction temperature. It protects MOSFETs, ICs, and sensor interfaces in automotive and industrial power supply rails.
For engineers reviewing the 1.5KE22CA-E3/51 datasheet, 1.5KE22CA-E3/51 pinout, 1.5KE22CA-E3/51 application, or 1.5KE22CA-E3/51 equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal derating curves, RoHS-compliant packaging, and direct alternatives for ESD/lightning surge protection design.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for sub-nanosecond response (<1 ns) and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping in AC-coupled or floating signal paths without polarity constraints.
It delivers 1500 W peak pulse power under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, and maintains stable clamping up to TJ = 175 °C using a thermally robust Case Style 1.5KE package with RθJL = 15.4 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at IT = 1 mA - defines reliable conduction onset under transient stress |
| VWM | 18.8 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 30.6 V at 49 A - clamped voltage during full 1500 W surge, limiting downstream device stress |
| PPPM | 1500 W - peak pulse power handling per 10/1000 µs waveform, critical for lightning/inductive spike immunity |
| IPPM | 49 A - maximum non-repetitive peak pulse current supported without failure |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package, 0.375" lead length, UL 94 V-0 molded epoxy |
Pinout & Package
1.5KE22CA-E3/51 uses a two-terminal axial-leaded DO-201AD (Case Style 1.5KE) package. Bidirectional construction means no cathode/anode marking; both terminals are functionally identical for transient suppression in either polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Transient current path | Provides symmetrical low-impedance shunt path for ±voltage spikes; no polarity dependency in circuit layout |
| Leads (matte tin plated) | Thermal and electrical interface | Solderable per J-STD-002/JESD 22-B102; supports 275 °C solder dip (10 s max); enables PCB heat sinking |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse rating (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and automotive systems |
| Sub-nanosecond response time | Clamps transients before sensitive ICs experience overvoltage damage (e.g., <1 ns vs. typical MOV delay >20 ns) |
| RoHS-compliant E3 suffix | Meets JEDEC JESD201 Class 1A whisker resistance; suitable for commercial-grade high-volume production |
| UL 94 V-0 flammability rating | Mold compound prevents flame propagation during catastrophic surge events, supporting safety-critical designs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and ground, absorbing energy before it reaches LDOs or microcontrollers. Use Value: Limits rail voltage to ≤30.6 V during 49 A surges, preventing latch-up or gate oxide rupture in 3.3 V/5 V logic devices. |
Use Scenario: Protecting analog front-ends of pressure/temperature sensors connected to long harnesses in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector entry point to divert induced lightning or EFT noise away from ADC inputs. Use Value: Sub-ns response ensures clamping occurs before 100 ns EFT bursts propagate into signal conditioning circuitry. |
| Telecom Line Interface Protection | Consumer Power Adapter Output Protection |
Use Scenario: Safeguarding Ethernet PHYs and PoE controllers against induced surges on outdoor cabling in telecom base stations. IC Role / Device Role / Timing Role: Bidirectional TVS installed across differential pairs (e.g., TX+/TX–) to clamp common-mode transients without disrupting DC bias. Use Value: Symmetrical VBR (20.9–23.1 V) matches typical 24 V PoE midspan operating margins while maintaining signal integrity. |
Use Scenario: Preventing output overvoltage damage in USB-C PD adapters due to feedback loop failure or Zener degradation. IC Role / Device Role / Timing Role: Secondary-level TVS on regulated 5/9/15/20 V outputs, acting as last-resort clamp after primary OVP circuits. Use Value: 30.6 V clamping voltage provides ≥2 V margin above 28.5 V USB-PD PPS max, ensuring safe shutdown of connected devices. |
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 | Lower peak power (600 W), smaller SMB package (surface-mount), higher VC (35.5 V @ 17.1 A) | Better suited for space-constrained PCBs where 1500 W is not required; less effective for high-energy lightning surges | Select when board area is limited and surge threat level is IEC 61000-4-5 Level 2–3 only |
| 1.5KE22A-E3/51 | Unidirectional version; same VBR, VC, and PPPM, but requires correct polarity placement and includes cathode band marking | Applicable only in DC-biased lines where polarity is fixed (e.g., +12 V supply to ground); unsuitable for AC or floating signals | Choose only if circuit topology guarantees consistent polarity and grounding scheme allows unidirectional placement |
Compared with 1.5KE22CA-E3/51, SMBJ22CA trades surge capacity for compactness, while 1.5KE22A-E3/51 sacrifices bidirectional flexibility for identical clamping performance in polarized rails-neither is pin-compatible, and both require layout review for thermal and routing impact.
Availability
1.5KE22CA-E3/51 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, telecom line interface protection, and consumer power adapter output protection requiring stable component supply and traceable sourcing.
Supply support for 1.5KE22CA-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, and protection devices with emphasis on reliability, thermal performance, and AEC-Q101 qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where 1500 W surge immunity and wide temperature operation are mandatory.
FAQ
What is the breakdown voltage tolerance of 1.5KE22CA-E3/51?
The 1.5KE22CA-E3/51 has a specified breakdown voltage range of 20.9 V to 23.1 V at test current IT = 1 mA, corresponding to ±5% tolerance around the nominal 22 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes from –55 °C to +175 °C.
Is 1.5KE22CA-E3/51 RoHS compliant and lead-free?
Yes, the "E3" suffix in 1.5KE22CA-E3/51 indicates full RoHS compliance per Directive 2011/65/EU, with matte tin-plated leads and lead-free molding compound. It also meets JEDEC JESD201 Class 1A whisker resistance testing, making it suitable for commercial-grade high-reliability assembly processes.
How does the clamping voltage of 1.5KE22CA-E3/51 compare to its breakdown voltage?
The 1.5KE22CA-E3/51 clamps at 30.6 V when subjected to its rated 49 A peak pulse current (10/1000 µs), which is approximately 33% above its minimum breakdown voltage of 20.9 V. This VC–VBR margin reflects low incremental surge resistance and ensures downstream components see controlled overvoltage during worst-case transients.
Can 1.5KE22CA-E3/51 be used in place of a unidirectional TVS like 1.5KE22A-E3/51?
No-1.5KE22CA-E3/51 is bidirectional and lacks polarity marking, while 1.5KE22A-E3/51 is unidirectional with a cathode band. Substituting them requires verifying circuit topology: 1.5KE22CA-E3/51 works in AC or floating nodes; 1.5KE22A-E3/51 must be oriented correctly in DC-biased paths. Layout and schematic changes are necessary for interchange.
What is the thermal resistance of 1.5KE22CA-E3/51 and how does it affect power handling?
The 1.5KE22CA-E3/51 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W. When mounted with 0.375" (9.5 mm) lead length, this enables efficient heat transfer to the PCB copper, allowing sustained 6.5 W power dissipation at TL = 75 °C. Derating begins above 25 °C ambient per Figure 2 in the datasheet.
1.5KE22CA-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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE22CA-E3/51 FAQ
1.How can I place an order for 1.5KE22CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE22CA-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 1.5KE22CA-E3/51 reliable?
The price and inventory of 1.5KE22CA-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 1.5KE22CA-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE22CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE22CA-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE22CA-E3/51?
1.5KE22CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE22CA-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 1.5KE22CA-E3/51?
For technical support, including 1.5KE22CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE22CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE22CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE22CA-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 1.5KE22CA-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE22CA-E3/51?
All 1.5KE22CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE22CA-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 1.5KE22CA-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE22CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE22CA-E3/51 Tags
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