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Diodes Incorporated 1.5KE250A-T
- Part No.:
- 1.5KE250A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE250A-T.pdf
- Description:
- TVS DIODE 214VWM 344VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:9,771
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Product details
Overview
1.5KE250A-T from Diodes Incorporated is a unidirectional 1500W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 214V reverse standoff voltage, 237–263V breakdown range at 1mA, 344V max clamping voltage at 5A peak pulse current, and operates from –55°C to +175°C. Used in industrial power supplies and telecom line cards to absorb lightning-induced surges.
For engineers reviewing the 1.5KE250A-T datasheet, 1.5KE250A-T pinout, 1.5KE250A-T application, or 1.5KE250A-T equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, peak pulse power handling under 1.0ms waveform, temperature coefficient of VBR (0.110%/°C), and DO-201 axial package compatibility with through-hole PCB layouts.
Technical Context
This unidirectional TVS diode uses glass-passivated silicon junction technology to achieve fast sub-nanosecond response to ESD and surge transients. Its 1500W peak pulse power rating is specified at tP = 1.0ms with 10/1000μs waveform compliance, and it maintains stable clamping performance across –55°C to +175°C junction temperature range.
The device exhibits low leakage (<5.0μA @ 214V) and a tightly controlled 237–263V breakdown window at 1.0mA test current. Its 0.110%/°C VBR temperature coefficient ensures predictable voltage shift under thermal stress in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W at 1.0ms pulse - sustains single high-energy surges without failure |
| Reverse Standoff Voltage | 214V - maximum continuous DC voltage before significant leakage begins |
| Breakdown Voltage Range | 237–263V @ 1.0mA - defines reliable conduction onset under transient stress |
| Max Clamping Voltage | 344V @ 5.0A - limits voltage seen by downstream circuitry during surge event |
| Operating Temperature | –55°C to +175°C - supports under-hood automotive and high-temp industrial use |
| Leakage Current | <5.0μA @ 214V - minimizes standby power loss in always-on systems |
| Temp Coefficient VBR | 0.110%/°C - enables accurate clamping voltage prediction across temperature |
Pinout & Package
Package: DO-201 axial leaded package with transfer-molded epoxy body (UL 94V-0), 1.12g weight, and tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during forward conduction | Connected to system ground or low-side reference in unidirectional clamp configuration |
| Cathode | Protected line connection point | Connected to line being protected; cathode band marking identifies polarity on body |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enhances long-term reliability and moisture resistance in harsh environments |
| 1500W peak pulse power rating | Meets IEC 61000-4-5 Level 4 (4kV) surge immunity requirements |
| Fast response time | Sub-nanosecond turn-on enables protection of sensitive CMOS interfaces |
| RoHS-compliant, halogen-free "Green" finish | Complies with EU Directive 2015/863/EU and automotive material restrictions |
| –55°C to +175°C operating range | Validated for under-hood automotive and industrial control cabinet deployment |
Applications
| Industrial Power Supply Input Protection | Telecom Line Card Surge Suppression |
|---|---|
Use Scenario: 24–48V DC input stage of programmable logic controller (PLC) power module exposed to load dump and inductive switching transients. IC Role / Device Role: Primary overvoltage clamp placed between input rail and ground, upstream of DC-DC converter. Use Value: Limits transient voltage to ≤344V, protecting 400V-rated input capacitors and MOSFET gate drivers from catastrophic failure. |
Use Scenario: T1/E1 interface card in central office equipment subjected to lightning-induced longitudinal surges on twisted-pair lines. IC Role / Device Role: Unidirectional shunt protector on line-side transformer secondary winding. Use Value: Clamps 1.0ms surges up to 1500W without degradation, preserving signal integrity and preventing PHY IC latch-up. |
| Automotive Body Control Module (BCM) | Renewable Energy Inverter DC Link |
Use Scenario: 12V battery-supplied BCM exposed to ISO 7637-2 Pulse 5a (load dump) events up to 60V for 400ms. IC Role / Device Role: Secondary clamp after LC filter, safeguarding microcontroller supply pins and CAN transceivers. Use Value: Withstands repeated 214V standoff and 344V clamping under thermal cycling, meeting AEC-Q101 stress requirements. |
Use Scenario: DC bus protection in solar string inverters where PV array faults generate high-energy voltage spikes. IC Role / Device Role: Parallel-connected TVS across 300–600V DC link capacitor bank. Use Value: Absorbs >1000W transients while maintaining <0.110%/°C VBR drift, ensuring consistent protection across ambient temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ250A | Lower 600W peak power; SMC (DO-214AB) surface-mount package; 356V clamping at 4.2A | Designed for space-constrained PCBs; lacks axial lead mechanical robustness for high-vibration environments | Select when board real estate is limited and surge energy rarely exceeds 600W |
| 1N5627 | Same DO-201 package; lower 1000W rating; 320V clamping at 3.1A; higher 0.120%/°C tempco | Legacy industrial design; less margin for high-energy transients and wider VBR drift over temperature | Acceptable only if system-level testing confirms 1000W capability suffices and thermal derating is applied |
Compared with SMBJ250A and 1N5627, the 1.5KE250A-T delivers superior 1500W surge handling in a mechanically stable axial package with tighter VBR tolerance and lower temperature coefficient-critical for high-reliability industrial and automotive deployments where sustained surge immunity and thermal predictability are non-negotiable.
Availability
1.5KE250A-T is available at Aetrix Electronics and suitable for industrial power supplies, telecom infrastructure equipment, and automotive body control modules requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE250A-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 robust, cost-effective overvoltage protection in industrial, automotive, and communications systems where reliability under repetitive surge stress is essential.
FAQ
What is the difference between 1.5KE250A-T and 1.5KE250CA-T?
The 1.5KE250A-T is unidirectional, featuring a cathode band marking and conducting only in reverse breakdown; the 1.5KE250CA-T is bidirectional, lacking polarity marking and clamping both positive and negative transients symmetrically. Their breakdown voltages (237–263V vs. ±237–263V) and clamping curves differ accordingly, making them non-interchangeable without circuit redesign.
Can 1.5KE250A-T be used in parallel for higher surge current handling?
No-due to VBR mismatch between units, paralleling causes current hogging and thermal runaway. Diodes Incorporated does not recommend parallel operation. For higher current capability, select a single higher-rated device such as 3KP250A or verify matched-bin devices with <1% VBR spread under actual surge conditions.
Is 1.5KE250A-T qualified to AEC-Q101?
No-while manufactured in IATF 16949-certified facilities and compliant with RoHS/halogen-free standards, the 1.5KE250A-T is not AEC-Q101 qualified. For automotive-grade TVS diodes, Diodes offers the AEC-Q101-qualified P6SMBJ250A or SMAJ250A families with full qualification documentation.
What is the meaning of the "-T" suffix in 1.5KE250A-T?
The "-T" suffix indicates tape-and-reel packaging: 1,000 pieces per 13-inch reel. This format supports automated SMT placement when used with axial-to-SMT adapters or manual through-hole assembly with reel-fed feeders; bulk-packaged versions use "-B" suffix instead.
1.5KE250A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 214V
- Voltage - Breakdown (Min):
- 237V
- Voltage - Clamping (Max) @ Ipp:
- 344V
- 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
1.5KE250A-T FAQ
1.How can I place an order for 1.5KE250A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE250A-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 1.5KE250A-T reliable?
The price and inventory of 1.5KE250A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE250A-T is usually 5 days.
3.What payment methods are accepted for 1.5KE250A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE250A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE250A-T?
1.5KE250A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE250A-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 1.5KE250A-T?
For technical support, including 1.5KE250A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE250A-T requirements.
6.How does Aetrix verify that 1.5KE250A-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE250A-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 1.5KE250A-T meets industry standards.
7.What is the process for return or replacement of 1.5KE250A-T?
All 1.5KE250A-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE250A-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 1.5KE250A-T part is unused and in its original packaging.
Return procedure for 1.5KE250A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE250A-T Tags
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