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Diodes Incorporated 1.5KE300CA-T
- Part No.:
- 1.5KE300CA-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE300CA-T.pdf
- Description:
- TVS DIODE 256VWM 414VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:7,029
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Product details
Overview
1.5KE300CA-T from Diodes Incorporated is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for robust overvoltage protection in DC power lines and signal interfaces. It features a 256V reverse standoff voltage (VRWM), 285–315V breakdown range (VBR), 414V maximum clamping voltage (VC) at 5A peak pulse current, and operates across –55°C to +175°C.
For engineers reviewing the 1.5KE300CA-T datasheet, 1.5KE300CA-T pinout, 1.5KE300CA-T application, or 1.5KE300CA-T equivalent, this part delivers verified clamping performance for automotive power rail surge suppression, industrial I/O protection, and telecom interface hardening where fast response (<1 ns), high peak power, and bidirectional polarity are required.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and stable clamping under 8/20 µs surge waveforms. Its symmetrical avalanche structure enables equal clamping in both polarities without external biasing.
The device is rated for 1500W non-repetitive peak pulse power (tp = 1.0 ms), with 5.0W steady-state dissipation at TL = 75°C and 200A peak forward surge capability. Temperature coefficient of VBR is +0.110%/°C, ensuring predictable voltage drift over wide operating ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W - Sustains single 1.0 ms 8/20 µs surges up to 1500W without failure |
| Reverse Standoff Voltage (VRWM) | 256 V - Maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 285–315 V @ 1 mA - Confirmed avalanche onset range for reliable triggering |
| Max Clamping Voltage (VC) | 414 V @ 5 A - Upper limit of voltage seen by protected circuit during 5A transient |
| Peak Pulse Current (IPP) | 5.0 A - Peak current at which VC = 414 V; defines usable surge energy window |
| Operating Temperature | –55°C to +175°C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| Leakage Current (IR) | 5.0 µA @ 256 V - Low standby power loss and minimal interference with upstream sensing |
Pinout & Package
Package: DO-201 axial-leaded through-hole package with transfer-molded epoxy body (UL 94V-0), 1.12 g mass, and tin-finished leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (Axial Leads) | Bidirectional terminal pair | No polarity marking; symmetric conduction allows installation without orientation check in AC or floating DC paths |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enhances long-term reliability and moisture resistance vs. epoxy-only passivation, critical for automotive under-hood use |
| Bidirectional configuration (suffix 'C') | Enables single-device protection of AC-coupled or floating DC lines without external diode pairing |
| Fast response time (<1 ns) | Clamps transients before sensitive downstream ICs experience overstress, meeting IEC 61000-4-5 Level 4 requirements |
| RoHS-compliant, halogen-free "Green" finish | Meets EU RoHS 3 (2015/863/EU) and automotive environmental mandates without compromising surge robustness |
| AEC-Q200 stress qualification support | Manufactured in IATF 16949-certified facilities; change-controlled for automotive applications requiring PPAP documentation |
Applications
| Automotive Power Distribution | Industrial PLC Analog Inputs |
|---|---|
Use Scenario: Protection of 24V battery-fed ECUs against load dump and alternator surge events. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point to shunt >100V transients. Use Value: Withstands 1500W pulses and maintains clamping below 414V, preventing damage to CAN transceivers and microcontrollers. |
Use Scenario: Guarding 4–20 mA current loop inputs against ESD and field wiring faults. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp both positive and negative polarity surges. Use Value: Symmetric 285–315V breakdown ensures identical protection for sensor reversal or induced AC noise without polarity constraints. |
| Telecom Line Interface | Renewable Energy Inverter DC Link |
Use Scenario: Shielding RS-485 transceivers on outdoor base station backhaul links from lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level protection staged after gas discharge tube (GDT), absorbing residual energy. Use Value: Sub-ns response captures fast-rising edges missed by GDTs; 414V clamping preserves transceiver absolute maximum ratings. |
Use Scenario: Safeguarding IGBT gate drivers and bus voltage monitors in solar string inverters exposed to grid switching transients. IC Role / Device Role / Timing Role: Parallel-mounted across DC link capacitors to clamp voltage overshoot during rapid IGBT turn-off. Use Value: 175°C max junction temperature supports operation near heatsinks; 200A surge rating handles repetitive inductive kickback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ300CA | 600W rating, SMB surface-mount package, lower clamping (387V @ 5A) | Better suited for space-constrained PCBs but limited to lower-energy surges | Select when board area is constrained and peak surge energy remains ≤600W |
| 1.5SMC300CA | Same 1500W rating, SMC package, slightly higher clamping (420V @ 5A) | Offers identical power handling in smaller footprint but requires rework for axial lead compatibility | Choose for automated assembly and higher-density layouts where DO-201 lead spacing is incompatible |
Compared with SMBJ300CA and 1.5SMC300CA, the 1.5KE300CA-T provides superior mechanical robustness via axial leads and higher surge margin in legacy through-hole designs, while maintaining identical electrical clamping behavior and thermal derating curves.
Availability
1.5KE300CA-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 1.5KE300CA-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, specializing in high-reliability protection, power management, and signal integrity solutions.
The 1.5KE series was developed specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure, emphasizing rugged packaging, wide temperature operation, and AEC-Q200-aligned manufacturing control.
FAQ
Is 1.5KE300CA-T suitable for automotive under-hood applications?
Yes. It is manufactured in IATF 16949-certified facilities and supports AEC-Q200 qualification protocols. Its –55°C to +175°C operating range, glass-passivated die, and 1500W surge rating meet under-hood ECU and body control module requirements for load dump and ISO 7637-2 compliance.
What is the difference between 1.5KE300CA-T and 1.5KE300A-T?
The 'C' suffix denotes bidirectional construction, meaning it clamps equally in both polarities. The unidirectional 1.5KE300A-T has a cathode band marking and only clamps in reverse bias. Both share identical VRWM, VBR, VC, and power ratings, but differ in polarity handling and marking.
Can 1.5KE300CA-T replace older 1.5KE300A parts in existing designs?
No direct drop-in replacement without circuit review. The bidirectional version lacks polarity marking and conducts in both directions, potentially causing unintended conduction in DC-biased circuits designed for unidirectional clamping. Layout and bias network must be verified.
Does 1.5KE300CA-T require derating at elevated ambient temperatures?
Yes. Peak pulse power must be linearly derated above +25°C ambient, per the datasheet's derating curve. At +75°C, PPK drops to ~1125W. Steady-state power is rated at 5.0W only when lead temperature (TL) is held at 75°C using 9.5 mm lead length per MIL-STD-202.
1.5KE300CA-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):
- 256V
- Voltage - Breakdown (Min):
- 285V
- Voltage - Clamping (Max) @ Ipp:
- 414V
- Current - Peak Pulse (10/1000µs):
- 5A
- 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
1.5KE300CA-T FAQ
1.How can I place an order for 1.5KE300CA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE300CA-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 1.5KE300CA-T reliable?
The price and inventory of 1.5KE300CA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE300CA-T is usually 5 days.
3.What payment methods are accepted for 1.5KE300CA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE300CA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE300CA-T?
1.5KE300CA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE300CA-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 1.5KE300CA-T?
For technical support, including 1.5KE300CA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE300CA-T requirements.
6.How does Aetrix verify that 1.5KE300CA-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE300CA-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 1.5KE300CA-T meets industry standards.
7.What is the process for return or replacement of 1.5KE300CA-T?
All 1.5KE300CA-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE300CA-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 1.5KE300CA-T part is unused and in its original packaging.
Return procedure for 1.5KE300CA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE300CA-T Tags
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