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Diodes Incorporated 1.5KE30CA-T
- Part No.:
- 1.5KE30CA-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE30CA-T.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:5,246
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Product details
Overview
1.5KE30CA-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 25.6V reverse standoff voltage, 28.5V minimum breakdown voltage, 41.4V maximum clamping voltage at 36A peak pulse current, and operates across -55°C to +175°C.
For engineers reviewing the 1.5KE30CA-T datasheet, 1.5KE30CA-T pinout, 1.5KE30CA-T application, or 1.5KE30CA-T equivalent, this device is selected for robust surge immunity in automotive power systems, industrial I/O interfaces, and telecom line protection where fast response (<1 ns), low leakage (<5 µA @ 25.6V), and high energy absorption are critical.
Technical Context
This bidirectional TVS diode uses glass-passivated silicon junctions to achieve sub-nanosecond response to transients and stable clamping performance under repetitive 8.3 ms half-sine surges up to 200A forward surge current. Its symmetrical V-I characteristics enable protection against both positive and negative polarity transients without polarity-sensitive placement.
The device complies with RoHS 3 and is halogen/antimony-free ("Green"), rated for 1500W peak pulse power at 1.0 ms, with 0.097%/°C voltage temperature coefficient and 5.0W steady-state dissipation at 75°C lead temperature - enabling reliable operation in thermally constrained environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W - absorbs single 1.0 ms transient events per IEC 61000-4-5 Level 4 without failure |
| Reverse Standoff Voltage (VRWM) | 25.6 V - maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 28.5 V min / 31.5 V max @ 1.0 mA - defines onset of avalanche conduction under controlled test conditions |
| Clamping Voltage (VC) | 41.4 V max @ 36 A IPP - limits protected circuit voltage during worst-case surge event |
| Peak Pulse Current (IPP) | 36 A - maximum non-repetitive surge current the device can safely clamp at VRWM |
| Operating Temperature | -55°C to +175°C - supports under-hood automotive, industrial motor drives, and outdoor power electronics |
| Leakage Current (IR) | 5.0 µA max @ 25.6 V - ensures minimal standby power loss and signal integrity in high-impedance circuits |
Pinout & Package
Package: DO-201 axial-leaded package with transfer-molded epoxy body (UL 94V-0), 1.12 g weight, and tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional configuration | Connected to lower-potential side of protected node; symmetric with cathode for AC/±DC protection |
| Cathode | Current exit point in forward bias; common terminal in bidirectional configuration | Connected to higher-potential side; forms symmetrical avalanche path with anode for bipolar transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures stable breakdown voltage and long-term reliability under thermal cycling and humidity stress |
| Bidirectional configuration (suffix "C") | Enables single-device protection of AC-coupled or floating differential signals without polarity orientation constraints |
| Fast response time (<1 ns) | Clamps ESD and lightning-induced transients before downstream ICs experience damaging overvoltage |
| RoHS 3 / Halogen-free "Green" compliance | Meets automotive and industrial environmental mandates with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb |
| 1500W peak pulse rating | Withstands IEC 61000-4-5 combination wave surges (2 Ω/12 Ω source impedance) in industrial power ports |
Applications
| Automotive Power Distribution | Industrial PLC Analog Inputs |
|---|---|
|
Use Scenario: Protection of 24V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and jump-start transients. IC Role / Device Role: Primary overvoltage clamp on main power rail upstream of DC-DC converters and microcontrollers. Use Value: Limits rail voltage to ≤41.4V during 100V/350ms load dump events, preventing damage to 36V-rated regulators and logic. |
Use Scenario: Guarding 4–20 mA current loop inputs against field-wiring induced surges in factory automation cabinets. IC Role / Device Role: Bidirectional shunt protector placed across input terminals before signal conditioning op-amps. Use Value: Clamps ±1 kV EFT bursts (IEC 61000-4-4) to safe levels while maintaining <5 µA leakage for accurate low-current measurement. |
| Telecom Line Interface | AC-DC Adapter Secondary Side |
|
Use Scenario: Surge protection on POTS or DSL line interface cards exposed to lightning-induced longitudinal surges. IC Role / Device Role: Symmetric TVS pair (with series impedance) protecting transformer-coupled line drivers/receivers. Use Value: Withstands 10/700 µs telecom surges up to 1.5 kV due to 1500W peak power rating and low clamping ratio (VC/VRWM = 1.62). |
Use Scenario: Output rail protection in isolated 12V/5V AC-DC adapters used in medical and industrial equipment. IC Role / Device Role: Final-stage clamp on secondary-side DC output to prevent overvoltage propagation to connected loads. Use Value: Maintains output regulation integrity during primary-side MOSFET failure or feedback loop disruption by limiting voltage to 41.4V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA | Same 30V standoff and bidirectional function but in SMB (DO-214AA) surface-mount package; 600W peak power rating | Lower power handling limits use to sub-20A surge environments; requires PCB real estate optimization | Select when board space is constrained and surge threat level is ≤600W (e.g., consumer USB ports) |
| 1.5SMC33CA | 33V standoff, 1500W rating, DO-214AB (SMC) package; 44.9V clamping at 33.3A IPP | Higher clamping voltage increases risk to 3.3V/5V logic; suitable only where protected ICs tolerate >44V transient | Choose only if system-level margin allows 44.9V clamping and DO-201 axial leads are not required |
Compared with 1.5KE30CA-T, SMBJ30CA offers compact SMT integration at reduced surge capacity, while 1.5SMC33CA trades tighter voltage tolerance for higher clamping - making the 1.5KE30CA-T optimal for through-hole, high-energy, and precise 25.6V rail protection.
Availability
1.5KE30CA-T is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC analog inputs, and telecom line interface applications requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE30CA-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design and manufacturing facilities certified to IATF 16949 and ISO 9001 standards.
The 1.5KE series targets high-reliability transient suppression in harsh environments, emphasizing robustness, wide temperature operation, and compliance with automotive and industrial surge immunity standards.
FAQ
What is the difference between 1.5KE30A and 1.5KE30CA-T?
The "C" suffix denotes bidirectional functionality: 1.5KE30CA-T clamps transients of either polarity symmetrically, while 1.5KE30A is unidirectional and requires correct anode/cathode orientation. Both share identical 25.6V standoff, 41.4V clamping, and DO-201 packaging, but only the "C" version is suitable for AC or floating DC protection.
Can 1.5KE30CA-T be used in place of a 33V TVS diode?
No - substituting 1.5KE30CA-T (25.6V VRWM) for a 33V device risks premature conduction and excessive leakage during normal 33V operation. Its 28.5V minimum breakdown is below typical 33V rail tolerances, potentially causing thermal runaway or degraded noise margins in regulated systems.
Is 1.5KE30CA-T compliant with AEC-Q101 for automotive use?
No - while Diodes Incorporated manufactures AEC-Q101-qualified TVS devices (e.g., D3V3M1U), the 1.5KE30CA-T is not AEC-Q101 certified. It meets general automotive requirements per note in the datasheet but lacks PPAP documentation and IATF 16949-controlled change management required for safety-critical vehicle subsystems.
What is the maximum allowable mounting torque for DO-201 leads?
Diodes Incorporated specifies no explicit torque value for DO-201 axial leads; mechanical data indicate leads are designed for standard hand-soldering or wave soldering. Excessive bending or twisting beyond 90° at the body may crack the epoxy encapsulant - leads should be formed prior to insertion with radius ≥0.8 mm and strain relief provided post-soldering.
1.5KE30CA-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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 36A
- 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
1.5KE30CA-T FAQ
1.How can I place an order for 1.5KE30CA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE30CA-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 1.5KE30CA-T reliable?
The price and inventory of 1.5KE30CA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE30CA-T is usually 5 days.
3.What payment methods are accepted for 1.5KE30CA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE30CA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE30CA-T?
1.5KE30CA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE30CA-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 1.5KE30CA-T?
For technical support, including 1.5KE30CA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE30CA-T requirements.
6.How does Aetrix verify that 1.5KE30CA-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE30CA-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 1.5KE30CA-T meets industry standards.
7.What is the process for return or replacement of 1.5KE30CA-T?
All 1.5KE30CA-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE30CA-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 1.5KE30CA-T part is unused and in its original packaging.
Return procedure for 1.5KE30CA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE30CA-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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Toshiba Semiconductor and Storage
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Diodes Incorporated
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