Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Taiwan Semiconductor Corporation 1.5KE250A

Name: 1.5KE250A
Brand: Taiwan Semiconductor Corporation
SKU: 1.5KE250A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 1.5KE250A

Manufacturer:: Taiwan Semiconductor Corporation

Category:: TVS Diodes

Package:: DO-201AA, DO-27, Axial

Datasheet:: 1.5KE250A.pdf

Description:: TVS 1500W 250V 5% UNIDIR DO-201

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:5,578

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

1.5KE250A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a nominal breakdown voltage of 250V, clamping voltage of 344V at 4.5A peak pulse current, and operates within -55°C to +175°C junction temperature range - deployed in automotive power supply rails and industrial control I/O protection.

For engineers reviewing the 1.5KE250A datasheet, 1.5KE250A pinout, 1.5KE250A application, or 1.5KE250A equivalent, key selection criteria include its DO-201 package compatibility, 214V working stand-off voltage, low leakage (<1µA above 10V), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

The 1.5KE250A uses an avalanche breakdown mechanism to clamp transient overvoltages within nanoseconds. Its unidirectional architecture provides polarity-sensitive protection with cathode-band marking, and it delivers stable clamping performance across ambient temperatures up to 125°C without derating when mounted on a 16mm × 16mm copper pad.

It meets JEDEC standards for peak pulse power (1500W at 10/1000μs), exhibits <1.0ps response time from 0V to V_BR, and maintains low dynamic impedance to minimize voltage overshoot during fast transients such as EFT and load dump events.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	214 V - Maximum continuous reverse operating voltage before conduction begins; ensures no interference with normal 200–220V DC system operation.
V_BR @ I_T=1mA	237–263 V - Verified breakdown threshold at 1mA test current; guarantees consistent turn-on behavior across production lots.
V_C @ I_PP=4.5A	344 V - Clamped voltage during 10/1000μs surge; defines maximum stress imposed on downstream circuitry.
P_PK	1500 W - Peak pulse power handling capability; enables robust protection against ISO 7637-2 Pulse 5a (load dump) surges.
I_R @ V_WM	<1 µA - Reverse leakage at rated stand-off voltage; minimizes standby power loss and avoids false triggering.
T_J max	+175 °C - Maximum junction temperature rating; supports operation in under-hood automotive environments and high-temperature industrial enclosures.

Pinout & Package

Package: DO-201 axial leaded package with pure tin-plated leads, UL 94V-0 molding compound, and cathode band marking for unidirectional polarity identification.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Low-side reference terminal	Connected to ground or low-voltage rail; completes clamping path during positive transients.
Cathode	High-side surge input terminal	Connected to protected line (e.g., battery feed); conducts avalanche current when V_AK exceeds V_BR.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD; suitable for engine control and body modules.
ISO 7637-2 compliant	Withstands Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) without degradation.
10/1000μs waveform rating	Rated for industry-standard surge profile used in automotive EMC testing; ensures predictable clamping under real-world load dump conditions.
Low dynamic impedance	Enables tight clamping window between V_BR and V_C; reduces voltage overshoot during fast-rising transients like ESD or lightning-induced surges.

Applications

Automotive Power Rail Protection	Industrial PLC I/O Protection
Use Scenario: Protecting 24V/48V battery-fed ECUs from load dump transients exceeding 100V and lasting up to 400ms. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between battery input and DC-DC converter input stage. Use Value: Limits peak voltage to ≤344V during 1500W surges, preventing damage to upstream regulators and microcontrollers.	Use Scenario: Safeguarding analog input channels of programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Front-end TVS element in signal conditioning circuitry before precision ADC inputs. Use Value: Maintains sub-1µA leakage at 214V stand-off, avoiding measurement drift while suppressing ±2kV EFT bursts.
Telecom Power Supply Input	Renewable Energy Inverter DC Link
Use Scenario: Securing primary-side rectifier outputs in telecom AC/DC front-ends subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level surge suppression after MOV-based primary clamping. Use Value: Provides precise 250V clamping threshold with <1ns response, complementing slower MOVs for multi-stage protection.	Use Scenario: Protecting DC bus connections in solar inverters where PV array transients can exceed 600V. IC Role / Device Role / Timing Role: Standoff-rated TVS on intermediate DC link between MPPT stage and inverter bridge. Use Value: Withstands repeated 1500W pulses without parameter shift, ensuring long-term reliability in outdoor installations.

Automotive Power Rail Protection

Industrial PLC I/O Protection

Use Scenario: Protecting 24V/48V battery-fed ECUs from load dump transients exceeding 100V and lasting up to 400ms.

IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between battery input and DC-DC converter input stage.

Use Value: Limits peak voltage to ≤344V during 1500W surges, preventing damage to upstream regulators and microcontrollers.

Use Scenario: Safeguarding analog input channels of programmable logic controllers exposed to field wiring surges.

IC Role / Device Role / Timing Role: Front-end TVS element in signal conditioning circuitry before precision ADC inputs.

Use Value: Maintains sub-1µA leakage at 214V stand-off, avoiding measurement drift while suppressing ±2kV EFT bursts.

Telecom Power Supply Input

Renewable Energy Inverter DC Link

Use Scenario: Securing primary-side rectifier outputs in telecom AC/DC front-ends subjected to lightning-induced surges.

IC Role / Device Role / Timing Role: Secondary-level surge suppression after MOV-based primary clamping.

Use Value: Provides precise 250V clamping threshold with <1ns response, complementing slower MOVs for multi-stage protection.

Use Scenario: Protecting DC bus connections in solar inverters where PV array transients can exceed 600V.

IC Role / Device Role / Timing Role: Standoff-rated TVS on intermediate DC link between MPPT stage and inverter bridge.

Use Value: Withstands repeated 1500W pulses without parameter shift, ensuring long-term reliability in outdoor installations.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Littelfuse SMAJ250A	Same DO-214AC package; lower P_PK (400W); higher V_C (410V @ 3.7A)	Not AEC-Q101 qualified; limited to commercial/industrial use	Select when space-constrained SMD layout is required and automotive qualification is unnecessary.
ON Semiconductor 1N6298A	Same DO-201 package; identical V_BR (237–263V); slightly higher V_C (350V @ 4.5A)	Meets ISO 7637-2 but lacks AEC-Q101 documentation in public datasheet	Choose when sourcing flexibility across multiple franchises is prioritized and full AEC-Q101 audit trail is not mandated.

Compared with SMAJ250A and 1N6298A, the 1.5KE250A offers superior surge energy handling (1500W vs. 400W/1500W), tighter clamping (344V vs. 410V/350V), and documented AEC-Q101 qualification - making it the preferred choice for automotive-critical power rail protection where thermal stability and long-term reliability are non-negotiable.

Availability

1.5KE250A is available at Aetrix Electronics and suitable for automotive ECU power management, industrial PLC I/O modules, and renewable energy inverter DC-link protection requiring stable component supply and long-lifecycle support.

Supply support for 1.5KE250A 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers with global distribution and AEC-Q101 validation capabilities.

The 1.5KE series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing robustness against ISO 7637-2 pulses, wide temperature operation, and long-term parametric stability.

FAQ

What is the maximum clamping voltage of the 1.5KE250A under standard surge conditions?

The 1.5KE250A has a maximum clamping voltage (V_C) of 344 V when subjected to a 10/1000 μs surge waveform with a peak current (I_PP) of 4.5 A. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.

Is the 1.5KE250A suitable for automotive applications requiring AEC-Q101 qualification?

Yes, the 1.5KE250A is explicitly AEC-Q101 qualified per the manufacturer's documentation, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD. This makes the 1.5KE250A appropriate for under-hood and chassis-mounted automotive systems where reliability under thermal and electrical stress is mandatory.

What is the working stand-off voltage (V_WM) of the 1.5KE250A, and why does it matter?

The 1.5KE250A has a working stand-off voltage (V_WM) of 214 V, meaning it remains non-conductive below this DC or RMS voltage level. This parameter ensures the device does not interfere with normal operation of 200–220V DC systems - such as telecom power supplies or industrial 24V/48V buses - while remaining ready to clamp transients exceeding its breakdown threshold.

How does the 1.5KE250A compare to bidirectional TVS diodes in terms of application scope?

The 1.5KE250A is unidirectional and intended for DC circuits with defined polarity, such as battery feeds or regulated power rails. Unlike bidirectional variants (e.g., 1.5KE250CA), it cannot protect AC signals or floating differential lines. Its cathode-band marking and asymmetric IV curve make it unsuitable for symmetrical surge environments without additional circuit design considerations.

What package type does the 1.5KE250A use, and what are its mechanical characteristics?

The 1.5KE250A uses the DO-201 axial-leaded package with pure tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 flame-retardant molding compound, and a typical weight of 0.090 g. Its standardized outline allows drop-in replacement in legacy through-hole designs and supports manual or wave-solder assembly without thermal compromise.

1.5KE250A Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Package/Case:: DO-201AA, DO-27, Axial

Series:: 1.5KE

Packaging:: Tape & Reel (TR)

Product Status:: Active

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):: 4.5A

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 FAQ

1.How can I place an order for 1.5KE250A through Aetrix?

Please submit a Request for Quotation (RFQ) for 1.5KE250A 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 reliable?

The price and inventory of 1.5KE250A 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 is usually 5 days.

3.What payment methods are accepted for 1.5KE250A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE250A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1.5KE250A?

1.5KE250A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1.5KE250A 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?

For technical support, including 1.5KE250A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE250A requirements.

6.How does Aetrix verify that 1.5KE250A is sourced from the original manufacturer or authorized distributors?

All 1.5KE250A 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 meets industry standards.

7.What is the process for return or replacement of 1.5KE250A?

All 1.5KE250A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE250A, 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 part is unused and in its original packaging.

Return procedure for 1.5KE250A:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…