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Diodes Incorporated 1.5KE400CA-T
- Part No.:
- 1.5KE400CA-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE400CA-T.pdf
- Description:
- TVS DIODE 342VWM 548VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:5,319
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Product details
Overview
1.5KE400CA-T from Diodes Incorporated is a bidirectional 1500W transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power lines and signal interfaces. It features a 342–420 V reverse standoff range, 548 V max clamping voltage at 4.0 A peak pulse current, and glass-passivated DO-201 axial package construction for robust surge immunity in industrial and automotive systems.
For engineers reviewing the 1.5KE400CA-T datasheet, 1.5KE400CA-T pinout, 1.5KE400CA-T application, or 1.5KE400CA-T equivalent, key selection criteria include clamping voltage margin relative to system rail, unidirectional vs. bidirectional polarity requirements, DO-201 thermal derating behavior, and RoHS-compliant lead-free termination compatibility with wave soldering processes.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<5 µA at 342 V) over temperature.
The device responds within <1.0 ns to ESD and lightning-induced transients, clamping energy surges per the 10/1000 µs waveform standard. Thermal performance is defined by 5.0 W steady-state dissipation at 75°C lead temperature and 1500 W non-repetitive peak pulse rating at 1.0 ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W - Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) without failure |
| Reverse Standoff Voltage | 342–420 V - Defines maximum continuous operating voltage before conduction begins |
| Max Clamping Voltage | 548 V @ 4.0 A - Limits protected circuit voltage during 10/1000 µs transient events |
| Breakdown Voltage | 380 V min @ 1 mA - Ensures reliable triggering above system nominal voltage |
| Operating Temperature | −55°C to +175°C - Supports under-hood automotive and high-temp industrial environments |
| Leakage Current | ≤5.0 µA @ 342 V - Minimizes standby power loss in high-impedance monitoring circuits |
Pinout & Package
Package: DO-201 axial-leaded epoxy molded case (UL 94V-0), 25.4 mm overall length, 5.0 mm body diameter, 1.0 mm lead diameter. Weight: 1.12 g. Marking: "1.5KE400CA" only (bidirectional devices omit cathode band).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during negative transients | Connects to line or signal node requiring bidirectional clamping |
| Cathode | Current entry point during positive transients | Connects to same line/signal node - symmetrical terminals for AC protection |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or floating rails without polarity biasing |
| Glass-passivated junction | Provides stable VBR tolerance (±5%) and low parameter drift across 1000+ surge cycles |
| Lead-free & halogen-free | Meets RoHS 3 (2015/863/EU) and automotive green standards (<900 ppm Br/Cl, <1000 ppm Sb) |
| Fast response time | <1.0 ns turn-on ensures suppression before sensitive downstream ICs experience overstress |
Applications
| Industrial Motor Drives | Automotive Power Distribution |
|---|---|
Use Scenario: Protection of gate drivers and current-sense amplifiers against inductive kickback from 48 V BLDC motor windings. IC Role / Device Role / Timing Role: Bidirectional TVS placed across DC bus inputs to clamp switching spikes up to ±1.2 kV. Use Value: 548 V clamping limits stress on 600 V-rated SiC MOSFET drivers while surviving repeated 1500 W pulses. |
Use Scenario: Surge suppression on battery feed lines to infotainment ECUs exposed to load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Primary front-end protector between fuse box and ECU input, rated for 12 V/24 V/48 V architectures. Use Value: 342–420 V standoff accommodates wide battery range; −55°C to +175°C rating supports under-hood placement. |
| Telecom Power Feeds | Renewable Energy Inverters |
Use Scenario: DC power input protection for PoE-powered remote radios subjected to induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional shunt device across 57 V PoE++ supply rail, coordinated with upstream GDT. Use Value: Symmetric clamping prevents polarity-dependent failure; 1.0 ns response captures fast-rising induced transients. |
Use Scenario: DC-link overvoltage protection in solar string inverters where PV array transients exceed 1000 V. IC Role / Device Role / Timing Role: Secondary clamp parallel to main MOV, limiting residual voltage after primary suppression. Use Value: 548 V clamping complements 600 V-rated IGBTs; DO-201 axial leads enable high-current PCB trace routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400CA | 600 W rating, SMB surface-mount package, 552 V clamping at 3.6 A | Lower power handling; suited for space-constrained PCBs but requires derating above 70°C | Select when board area is limited and peak surge energy ≤600 W |
| 1.5SMC400CA | Same 1500 W rating, SMC package, 552 V clamping at 4.0 A, 2.5× smaller footprint than DO-201 | Higher thermal resistance (RθJA = 50°C/W vs. DO-201's ~30°C/W); needs copper pour for full rating | Select when automated assembly and higher density are prioritized over axial lead mechanical robustness |
Compared with 1.5KE400CA-T, SMBJ400CA offers compactness at reduced surge capacity, while 1.5SMC400CA matches power rating in a smaller SMC package but demands careful thermal layout-DO-201 remains optimal for high-reliability through-hole mounting and natural convection cooling.
Availability
1.5KE400CA-T is available at Aetrix Electronics and suitable for industrial motor drives, automotive power distribution, and telecom power feeds requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE400CA-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 manufacturing certified to IATF 16949 and product qualification to AEC-Q101.
The 1.5KE series targets high-energy transient suppression in harsh environments, emphasizing rugged DO-201 packaging, wide temperature operation, and consistent clamping performance across automotive and industrial voltage rails.
FAQ
Is 1.5KE400CA-T still in active production?
No-1.5KE400CA-T is officially discontinued per Diodes Incorporated's DS21503 Rev. 12 (May 2023). Aetrix Electronics maintains legacy inventory with full traceability and offers validated alternatives including 1.5SMC400CA and SMBJ400CA with documented performance mapping.
What is the difference between 'A' and 'CA' suffixes in the 1.5KE series?
The 'A' suffix denotes unidirectional TVS diodes with a cathode band marking; 'CA' indicates bidirectional devices with identical markings on both ends and symmetrical breakdown in both polarities. 1.5KE400CA-T has no polarity orientation requirement during placement.
Can 1.5KE400CA-T be used in place of 1.5KE400A?
No-1.5KE400A is unidirectional and conducts only during positive transients; substituting the bidirectional 1.5KE400CA-T may cause unintended conduction in DC-biased circuits. Polarity must match the original design intent and clamping direction requirements.
What is the maximum allowable lead temperature during soldering?
Per Diodes' specification, 1.5KE400CA-T supports wave soldering at 260°C for 10 seconds maximum, with preheat to 150°C. Hand soldering requires ≤350°C tip temperature for ≤3 seconds per lead to avoid internal die stress or epoxy delamination.
1.5KE400CA-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):
- 342V
- Voltage - Breakdown (Min):
- 380V
- Voltage - Clamping (Max) @ Ipp:
- 548V
- Current - Peak Pulse (10/1000µs):
- 4A
- 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
1.5KE400CA-T FAQ
1.How can I place an order for 1.5KE400CA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE400CA-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 1.5KE400CA-T reliable?
The price and inventory of 1.5KE400CA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE400CA-T is usually 5 days.
3.What payment methods are accepted for 1.5KE400CA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE400CA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE400CA-T?
1.5KE400CA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE400CA-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 1.5KE400CA-T?
For technical support, including 1.5KE400CA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE400CA-T requirements.
6.How does Aetrix verify that 1.5KE400CA-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE400CA-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 1.5KE400CA-T meets industry standards.
7.What is the process for return or replacement of 1.5KE400CA-T?
All 1.5KE400CA-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE400CA-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 1.5KE400CA-T part is unused and in its original packaging.
Return procedure for 1.5KE400CA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE400CA-T Tags
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ESD9B5.0ST5G
onsemi
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Diodes Incorporated
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Diodes Incorporated
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