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

Taiwan Semiconductor Corporation 1.5KE30

Name: 1.5KE30
Brand: Taiwan Semiconductor Corporation
SKU: 1.5KE30
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1.5KE30

Manufacturer:: Taiwan Semiconductor Corporation

Category:: TVS Diodes

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

Datasheet:: 1.5KE30.pdf

Description:: 1500W, 30V, 10%, UNIDIRECTIONAL,

Quantity:: RFQ Add To RFQ list

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Inventory:9,335

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Product details

Overview

1.5KE30 from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 30 V, minimum/maximum V_BR of 27.0 V / 33.0 V at 1.0 mA test current, working stand-off voltage of 24.3 V, and clamping voltage of 43.5 V at 36 A peak pulse current. It is designed for automotive-grade inductive load protection and ESD immunity in power supply rails and I/O lines.

For engineers reviewing the 1.5KE30 datasheet, 1.5KE30 pinout, 1.5KE30 application, or 1.5KE30 equivalent, this part serves as a high-energy, fast-response overvoltage clamp for 24 V industrial control systems, automotive body electronics, and DC-DC converter input protection where low leakage (<1 µA @ 24.3 V), DO-201 packaging, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance are required.

Technical Context

The 1.5KE30 operates as a unidirectional avalanche diode, exhibiting sub-nanosecond response time (<1.0 ps from 0 V to V_BR) and low dynamic impedance to rapidly clamp transients. Its junction temperature range spans −55 °C to +175 °C, supporting under-hood automotive deployment without derating up to 75 °C ambient.

It delivers 1500 W peak pulse power per 10/1000 µs waveform, with forward surge capability of 200 A (8.3 ms half-sine) and forward voltage of 3.5 V at 50 A - confirmed only for devices with V_BR ≤ 200 V. The device meets AEC-Q101 qualification when ordered with "H" suffix (e.g., 1.5KE30H), though standard 1.5KE30 is not AEC-Q101 qualified per ordering code documentation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BR @ I_T = 1.0 mA	27.0 V min / 33.0 V max - defines precise avalanche initiation threshold for reliable overvoltage triggering
V_WM	24.3 V - maximum continuous reverse voltage before leakage exceeds 1 µA; sets safe operating margin below V_BR
V_C @ I_PP = 36 A	43.5 V - clamped voltage during worst-case 10/1000 µs surge; determines protected circuit's maximum stress level
P_PK	1500 W - peak transient energy absorption capacity; enables robust protection against ISO 7637-2 Pulse 1 and 2b
I_FSM	200 A - non-repetitive forward surge rating; supports inductive turn-off spikes in relay or solenoid drivers
Junction Temp Range	−55 °C to +175 °C - validated thermal envelope for under-hood and industrial environments without external heatsinking
Package	DO-201 - industry-standard axial leaded package with tin-plated leads, UL 94V-0 molding, and 0.090 g mass

Pinout & Package

Package: DO-201 - axial-leaded, molded epoxy case with cathode band marking for unidirectional polarity. Leads are pure tin-plated, solderable per J-STD-002, and pass JESD 201 Class 2 whisker testing.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Ground-reference terminal	Connected to system ground or low-side return; completes conduction path during reverse-biased clamping
Cathode	Protected-line terminal	Connected to line being protected (e.g., 24 V rail); avalanche conduction occurs from cathode to anode when V_AK > V_BR

Key Features

Feature	Design Value
Clamping performance	43.5 V max at 36 A - limits downstream IC voltage stress to safe levels during 10/1000 µs transients
Leakage control	<1 µA @ 24.3 V - prevents standby current drain in battery-powered 24 V systems
Response speed	<1.0 ps rise-to-V_BR - faster than most microsecond-scale transients, ensuring clamping before damage occurs
Surge robustness	1500 W @ 10/1000 µs - withstands repeated ISO 7637-2 Pulse 1 (inductive switch-off) events without degradation
Environmental compliance	RoHS-compliant, halogen-free (IEC 61249-2-21), UL 94V-0 molding - meets automotive and industrial regulatory requirements

Applications

Automotive Body Control Module (BCM)	Industrial 24 V PLC Input Protection
Use Scenario: Protecting microcontroller GPIO and CAN transceiver power rails from load dump and inductive kickback in door module actuators. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between 24 V supply and ground, clamping surges before they reach LDOs and interface ICs. Use Value: Limits transient voltage to ≤43.5 V, preventing latch-up or oxide breakdown in 3.3 V/5 V logic powered from local 24 V–5 V converters.	Use Scenario: Safeguarding digital input terminals of programmable logic controllers against field-wiring transients and ESD in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V dry-contact inputs, mounted directly at connector entry point. Use Value: Absorbs 1500 W surges while maintaining <1 µA leakage, enabling high-impedance sensing without false triggering.
DC-DC Converter Input Stage	LED Driver Power Rail Protection
Use Scenario: Shielding buck converter front-end MOSFETs and controller ICs from voltage spikes caused by long cable inductance in vehicle auxiliary power systems. IC Role / Device Role / Timing Role: Fast-acting shunt clamp across input capacitor, activated within <1 ps to divert surge current away from switching components. Use Value: Clamps 10/1000 µs pulses to 43.5 V, keeping input voltage within 40 V absolute maximum rating of common 45 V-rated controllers.	Use Scenario: Preventing catastrophic failure of constant-current LED driver ICs due to hot-plug transients or lightning-induced surges on outdoor signage power feeds. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V input rail upstream of driver IC, sized to handle repetitive 1500 W pulses without thermal runaway. Use Value: Maintains 24.3 V working voltage margin while delivering 36 A peak current handling - sufficient for EN 61000-4-5 Level 3 surge immunity.

Automotive Body Control Module (BCM)

Industrial 24 V PLC Input Protection

Use Scenario: Protecting microcontroller GPIO and CAN transceiver power rails from load dump and inductive kickback in door module actuators.

IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between 24 V supply and ground, clamping surges before they reach LDOs and interface ICs.

Use Value: Limits transient voltage to ≤43.5 V, preventing latch-up or oxide breakdown in 3.3 V/5 V logic powered from local 24 V–5 V converters.

Use Scenario: Safeguarding digital input terminals of programmable logic controllers against field-wiring transients and ESD in factory automation cabinets.

IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V dry-contact inputs, mounted directly at connector entry point.

Use Value: Absorbs 1500 W surges while maintaining <1 µA leakage, enabling high-impedance sensing without false triggering.

DC-DC Converter Input Stage

LED Driver Power Rail Protection

Use Scenario: Shielding buck converter front-end MOSFETs and controller ICs from voltage spikes caused by long cable inductance in vehicle auxiliary power systems.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp across input capacitor, activated within <1 ps to divert surge current away from switching components.

Use Value: Clamps 10/1000 µs pulses to 43.5 V, keeping input voltage within 40 V absolute maximum rating of common 45 V-rated controllers.

Use Scenario: Preventing catastrophic failure of constant-current LED driver ICs due to hot-plug transients or lightning-induced surges on outdoor signage power feeds.

IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V input rail upstream of driver IC, sized to handle repetitive 1500 W pulses without thermal runaway.

Use Value: Maintains 24.3 V working voltage margin while delivering 36 A peak current handling - sufficient for EN 61000-4-5 Level 3 surge immunity.

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 SMAJ30A	DO-214AC (SMA) package, 30 V V_BR (28.5–31.5 V), 43.5 V V_C @ 34.4 A, 400 W P_PK	Lower surge rating (400 W vs. 1500 W); suitable for lower-energy transients or space-constrained PCBs	Select SMAJ30A only if board layout requires surface-mount and system-level transients are limited to IEC 61000-4-5 Level 2.
ON Semiconductor 1N6282A	Same 1.5KE30 family, tighter V_BR tolerance (28.5–31.5 V vs. 27.0–33.0 V), identical DO-201 package and 41.4 V V_C @ 38 A	No functional difference; optimized for designs requiring tighter voltage binning and lower clamping variance	Choose 1N6282A when V_BR consistency across production lots is critical for predictable clamping onset in safety-critical subsystems.

Compared with 1.5KE30, SMAJ30A offers surface-mount compatibility but sacrifices 73% peak power handling, while 1N6282A provides tighter V_BR control without changing footprint or clamping performance - making it a direct upgrade path for precision-sensitive designs.

Availability

1.5KE30 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and DC-DC converter front-end protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 1.5KE30 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, rectifiers, and thyristors, with global distribution and AEC-Q101 qualified product lines.

The 1.5KE series was developed specifically for high-energy transient suppression in automotive and industrial 12 V/24 V systems, emphasizing rugged DO-201 packaging, ISO 7637-2 compliance, and extended temperature operation.

FAQ

What is the maximum clamping voltage of the 1.5KE30 under standard test conditions?

The 1.5KE30 has a maximum clamping voltage (V_C) of 43.5 V when subjected to a 10/1000 µs surge current of 36 A. This value is measured per JEDEC standards and represents the highest voltage the device allows across its terminals during a defined transient event. It ensures downstream components see no more than 43.5 V, critical for protecting 40 V-rated ICs in 24 V systems. The 1.5KE30 maintains this clamping performance consistently across its rated temperature range.

Is the 1.5KE30 suitable for bidirectional transient protection?

No, the 1.5KE30 is a unidirectional TVS diode, intended for use with polarity-aware circuits such as DC power rails where the cathode connects to the protected line and the anode to ground. For bidirectional protection (e.g., AC lines or data buses), a bipolar variant like 1.5KE30CA must be used. The 1.5KE30 datasheet explicitly states electrical characteristics apply only in the reverse direction, and its marking includes a cathode band - confirming unidirectional functionality. Using 1.5KE30 in bidirectional configurations risks forward conduction and failure.

What is the working stand-off voltage (V_WM) of the 1.5KE30, and why does it matter?

The 1.5KE30 has a working stand-off voltage (V_WM) of 24.3 V - the maximum DC or continuous peak voltage the device can block without exceeding 1 µA leakage current. This parameter ensures the 1.5KE30 remains non-conductive during normal 24 V system operation, avoiding power loss or false triggering. It provides a 5.7 V margin below the minimum breakdown voltage (27.0 V), allowing for manufacturing variation and temperature drift while maintaining reliable standoff. Selecting a V_WM too close to system voltage risks nuisance conduction; 24.3 V is purpose-built for nominal 24 V applications.

Does the 1.5KE30 meet AEC-Q101 qualification?

The base 1.5KE30 part is not AEC-Q101 qualified; qualification applies only to variants with the "H" suffix (e.g., 1.5KE30H), as stated in the Ordering Information section. The standard 1.5KE30 shares the same DO-201 package, electrical specs, and mechanical construction but lacks the extended reliability testing required for automotive under-hood use. Engineers designing for AEC-Q101 compliance must specify the H-suffix version - the 1.5KE30 itself is suitable for industrial and commercial applications meeting ISO 7637-2 and RoHS, but not certified for automotive qualification programs.

How does the 1.5KE30 compare to the 1.5KE30A variant?

The 1.5KE30A (JEDEC type 1N6282A) features a tighter breakdown voltage range of 28.5 V to 31.5 V versus 27.0 V to 33.0 V for the 1.5KE30, resulting in lower clamping voltage (41.4 V vs. 43.5 V at rated current) and improved consistency across production lots. Both share identical DO-201 packaging, thermal ratings, and surge capability. The 1.5KE30A is preferred in designs where precise clamping onset is critical - such as safety-monitoring circuits - while the standard 1.5KE30 offers broader voltage tolerance for cost-sensitive or less stringent applications. Both are drop-in replacements electrically and mechanically.

1.5KE30 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):: 24.3V

Voltage - Breakdown (Min):: 27V

Voltage - Clamping (Max) @ Ipp:: 43.5V

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:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: DO-201

1.5KE30 FAQ

1.How can I place an order for 1.5KE30 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1.5KE30 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 1.5KE30 reliable?

The price and inventory of 1.5KE30 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE30 is usually 5 days.

3.What payment methods are accepted for 1.5KE30?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE30 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1.5KE30?

1.5KE30 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1.5KE30 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 1.5KE30?

For technical support, including 1.5KE30 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE30 requirements.

6.How does Aetrix verify that 1.5KE30 is sourced from the original manufacturer or authorized distributors?

All 1.5KE30 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 1.5KE30 meets industry standards.

7.What is the process for return or replacement of 1.5KE30?

All 1.5KE30 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE30, 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 1.5KE30 part is unused and in its original packaging.

Return procedure for 1.5KE30:

1.Submit a request within 90 days.

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

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