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Diodes Incorporated 1.5KE68CA-T
- Part No.:
- 1.5KE68CA-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE68CA-T.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:6,442
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Product details
Overview
1.5KE68CA-T from Diodes Incorporated is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for overvoltage protection of DC power rails and signal lines. It features a 58.1V reverse standoff voltage, 64.6V minimum breakdown voltage at 1mA, 92.0V maximum clamping voltage at 16.3A peak pulse current, and operates across –55°C to +175°C.
For engineers reviewing the 1.5KE68CA-T datasheet, 1.5KE68CA-T pinout, 1.5KE68CA-T application, or 1.5KE68CA-T equivalent, this part serves as a high-energy, fast-response surge protector for automotive power systems, industrial I/O interfaces, telecom line cards, and DC-DC converter input stages where robust ESD and lightning surge immunity are required.
Technical Context
This bidirectional TVS diode uses glass-passivated silicon junction technology to achieve sub-nanosecond response time and stable clamping performance under repetitive 1.0ms 8/20μs surge waveforms. Its symmetrical V-I characteristic enables protection of AC-coupled or floating signal paths without polarity constraints.
The device is rated for 1500W peak pulse power (tP = 1.0ms), with a temperature coefficient of 0.104%/°C for VBR, and maintains ≤5.0μA reverse leakage at 58.1V. Its axial-leaded DO-201 package supports manual or wave soldering per MIL-STD-202 Method 208.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W - sustains single 1.0ms surge without degradation |
| Reverse Standoff Voltage (VRWM) | 58.1V - maximum continuous DC or RMS voltage before conduction begins |
| Breakdown Voltage (VBR) | 64.6V min @ 1mA - precise threshold for avalanche initiation |
| Clamping Voltage (VC) | 92.0V max @ 16.3A - limits protected circuit voltage during surge |
| Peak Pulse Current (IPP) | 16.3A - maximum non-repetitive surge current it can divert |
| Operating Temperature | –55°C to +175°C - suitable for under-hood automotive and industrial environments |
| Leakage Current (IR) | ≤5.0μA @ 58.1V - ensures minimal standby power loss and signal integrity |
Pinout & Package
DO-201 axial-leaded package: hermetically sealed glass-passivated die in transfer-molded epoxy (UL 94V-0), 1.12g weight, tin-plated leads solderable per MIL-STD-202 Method 208. Marking: "1.5KE68CA" only (bidirectional, no cathode band).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (during negative transients) | One terminal of symmetrical avalanche junction; interchangeable with cathode in bidirectional operation |
| Cathode | Surge current entry (during positive transients) | Second terminal of symmetrical junction; no polarity marking required for CA suffix parts |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables AC or floating-line protection without external polarity management |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%) and long-term reliability under thermal cycling |
| 1500W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4kV line-to-line, 2kV line-to-earth) surge requirements |
| RoHS-compliant & halogen-free | Complies with EU Directive 2015/863/EU and automotive "Green" standards (<900ppm Br+Cl, <1000ppm Sb) |
| Fast response time | Sub-1ns junction response ensures clamping before downstream IC damage occurs |
Applications
| Automotive Power Distribution | Industrial PLC Analog Inputs |
|---|---|
Use Scenario: Protection of 12V/24V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontroller power rails. Use Value: Clamps 120V/250A load dump surges to ≤92V, preventing regulator latch-up and MOSFET gate oxide failure. |
Use Scenario: Shielding 4–20mA current loop inputs from field-induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional shunt protector across input terminals, referenced to isolated signal ground. Use Value: Maintains analog accuracy by limiting leakage to ≤5μA at 24V operating voltage while surviving 1kV/500A surge events. |
| Telecom Line Interface | DC-DC Converter Input Stage |
Use Scenario: Surge protection on POTS or xDSL line interface circuits exposed to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Symmetrical TVS pair bridging tip/ring or differential data lines. Use Value: Matches impedance symmetry of balanced lines and clamps ±1500V surges within 1ns without signal distortion. |
Use Scenario: Input rail protection for isolated flyback or forward converters in industrial power supplies. IC Role / Device Role / Timing Role: Front-end clamping device between bulk capacitor and primary-side switch FET. Use Value: Absorbs reflected switching spikes and external surges, reducing stress on primary MOSFET and enabling smaller snubber design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA | Lower peak power (600W), smaller SMB package (surface-mount), 64V VRWM, 103V VC @ 5.8A | Preferred for space-constrained PCBs; insufficient for IEC 61000-4-5 Level 4 line surges | Select when board area is critical and surge energy is ≤600W; verify thermal derating in reflow profiles |
| 1.5SMC68CA | Same 1500W rating and 68V rating, but SMC package (surface-mount), 92V VC @ 16.3A, RoHS-compliant | Drop-in replacement for automated assembly; lacks axial lead mechanical robustness for high-vibration environments | Choose for high-volume SMT production where manual handling and vibration resistance are not primary concerns |
Compared with SMBJ64CA and 1.5SMC68CA, the 1.5KE68CA-T offers superior mechanical ruggedness via axial leads and proven reliability in high-temperature under-hood applications, while maintaining identical clamping performance-making it optimal for legacy through-hole designs requiring full 1500W surge handling.
Availability
1.5KE68CA-T is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC analog inputs, telecom line interface, and DC-DC converter input stage applications requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE68CA-T 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The 1.5KE series belongs to Diodes' high-power TVS portfolio, engineered specifically for industrial and automotive surge immunity compliance (IEC 61000-4-5, ISO 7637-2), emphasizing robustness, tight VBR tolerance, and extended temperature operation.
FAQ
What does the 'CA' suffix indicate in 1.5KE68CA-T?
The 'CA' suffix denotes a bidirectional configuration: the device provides symmetrical clamping for both positive and negative transients without polarity dependence. Unlike unidirectional 'A' variants, it has no cathode band marking and is used where AC signals, floating grounds, or dual-polarity surges require protection without external diode pairing.
Is 1.5KE68CA-T suitable for IEC 61000-4-5 compliance testing?
Yes-its 1500W peak pulse power, 92.0V clamping voltage at 16.3A, and sub-1ns response meet IEC 61000-4-5 Level 4 (4kV line-to-line, 2kV line-to-earth) requirements when properly mounted with low-inductance layout. It must be paired with appropriate PCB trace width and grounding to avoid parasitic inductance degrading clamping performance.
How does temperature affect the breakdown voltage of 1.5KE68CA-T?
The breakdown voltage exhibits a +0.104%/°C temperature coefficient. At +125°C, VBR increases by approximately 5.2% over its 25°C value (64.6V → ~67.9V). This positive drift must be accounted for in high-temperature designs to ensure margin remains above system operating voltage during worst-case thermal conditions.
Can 1.5KE68CA-T replace a unidirectional 1.5KE68A-T in an existing design?
No-direct substitution is not recommended. The unidirectional 1.5KE68A-T conducts only during positive surges and requires correct polarity orientation; replacing it with bidirectional 1.5KE68CA-T removes polarity dependency but may alter circuit behavior in DC-biased paths, especially where reverse leakage or forward conduction matters. Layout and system-level surge path analysis must be repeated.
1.5KE68CA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 16.3A
- 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:
- DO-201
1.5KE68CA-T FAQ
1.How can I place an order for 1.5KE68CA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE68CA-T 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 1.5KE68CA-T reliable?
The price and inventory of 1.5KE68CA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE68CA-T is usually 5 days.
3.What payment methods are accepted for 1.5KE68CA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE68CA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE68CA-T?
1.5KE68CA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE68CA-T 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 1.5KE68CA-T?
For technical support, including 1.5KE68CA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE68CA-T requirements.
6.How does Aetrix verify that 1.5KE68CA-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE68CA-T 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 1.5KE68CA-T meets industry standards.
7.What is the process for return or replacement of 1.5KE68CA-T?
All 1.5KE68CA-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE68CA-T, 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 1.5KE68CA-T part is unused and in its original packaging.
Return procedure for 1.5KE68CA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE68CA-T Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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