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

Taiwan Semiconductor Corporation 1V5KE170A

Name: 1V5KE170A
Brand: Taiwan Semiconductor Corporation
SKU: 1V5KE170A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1V5KE170A

Manufacturer:: Taiwan Semiconductor Corporation

Category:: TVS Diodes

Package:: DO-201AE, Axial

Datasheet:: 1V5KE170A.pdf

Description:: TVS DIODE 145VWM 234VC DO201AE

Quantity:: RFQ Add To RFQ list

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Product details

Overview

1V5KE170A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with breakdown voltage 162–179 V at 1 mA test current, reverse stand-off voltage 145 V, clamping voltage 234 V at 6.4 A peak pulse current, and maximum junction temperature of 175°C. It protects power rails and I/O lines in industrial power supplies and motor drives against ESD and lightning-induced surges.

For engineers reviewing the 1V5KE170A datasheet, 1V5KE170A pinout, 1V5KE170A application, or 1V5KE170A equivalent, key selection criteria include clamping voltage margin relative to protected IC V_DD, peak pulse current capability under 10/1000 µs waveform, thermal derating above 75°C ambient, and DO-201 mechanical compatibility with existing PCB footprints.

Technical Context

The 1V5KE170A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified V_BR range (162–179 V). Its glass-passivated junction ensures stable breakdown behavior and low leakage (<5 µA at 145 V).

It delivers 1500 W peak pulse power for 1 ms per JEDEC standard, with low incremental surge resistance enabling tight clamping (V_C = 234 V at I_PPM = 6.4 A), and responds in <1 ns to fast transients such as EFT and IEC 61000-4-4 events.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BR (min/max)	162 V / 179 V at 1 mA - defines minimum trigger threshold and worst-case conduction onset under production tolerance
V_RWM	145 V - maximum continuous reverse operating voltage before significant leakage begins
V_C @ I_PPM	234 V at 6.4 A - clamped voltage during 10/1000 µs surge, determines protection margin for downstream 200 V-rated components
P_PPM	1500 W - peak pulse power handling for 1 ms, supports IEC 61000-4-5 Level 4 (4 kV line-to-line) compliance
I_R @ V_RWM	<5 µA - ensures negligible standby power loss and signal integrity in high-impedance circuits
T_J(max)	175°C - enables operation in enclosed industrial enclosures with limited airflow and high ambient temperatures
Package	DO-201 - axial-leaded through-hole package with 0.090 g mass, UL 94V-0 molding, and J-STD-002 solderable tin plating

Pinout & Package

DO-201 package: axial-leaded, cylindrical body with cathode band marking. Leads are pure tin-plated, compliant with J-STD-002 solderability requirements. Polarity is marked by a single band indicating cathode terminal.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction path / surge return path	Connected to ground or low-impedance return plane; carries full surge current during clamping
Cathode	Protected line input / high-side connection	Connected to the line or signal being protected; reverse-biased during normal operation

Key Features

Feature	Design Value
Glass-passivated junction	Ensures stable V_BR over temperature and lifetime, with minimal parameter drift across 1000+ surge events
1500 W peak pulse rating	Supports robust protection against 4 kV IEC 61000-4-5 surges on 24 V–48 V DC power inputs without derating
Clamping ratio (V_C/V_BR)	~1.42 - indicates efficient energy diversion with low overvoltage stress on protected circuitry
Low IR at VRWM	<5 µA at 145 V - prevents loading of high-impedance sensor outputs or reference nodes

Applications

Industrial Power Supply Protection	Motor Drive DC Bus Clamping
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and inductive kickback. IC Role / Device Role: Primary overvoltage clamp on main DC input rail upstream of DC-DC converters and microcontrollers. Use Value: Limits transient excursions to ≤234 V, preserving 200 V-rated electrolytic capacitors and MOSFETs while surviving repeated 1500 W pulses.	Use Scenario: DC bus of 3-phase inverter driving HVAC compressors, subject to regenerative braking spikes and switching noise. IC Role / Device Role: Unidirectional TVS placed between DC+ and ground to absorb positive-going bus overvoltages. Use Value: Clamps 10/1000 µs surges to 234 V within 1 ns, preventing gate driver latch-up and IGBT short-circuit failure during fault conditions.
Telecom Line Interface Protection	Renewable Energy Charge Controller
Use Scenario: 24 V auxiliary power feed to remote base station radios, routed alongside RF cables susceptible to induced lightning currents. IC Role / Device Role: First-stage surge protector on DC input before DC-DC isolation and LDO regulation. Use Value: Withstands 6.4 A peak pulse current and maintains <5 µA leakage, ensuring no impact on 100 µA sleep-mode current budgets.	Use Scenario: Solar charge controller connecting PV array to 48 V battery bank, exposed to open-circuit voltage transients up to 200 V. IC Role / Device Role: Overvoltage clamp on PV input terminals to protect MPPT controller MOSFETs and sensing circuitry. Use Value: Breakdown at 162–179 V provides 20–30 V design margin above 150 V nominal PV string OCV, enabling reliable field deployment.

Industrial Power Supply Protection

Motor Drive DC Bus Clamping

Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and inductive kickback.

IC Role / Device Role: Primary overvoltage clamp on main DC input rail upstream of DC-DC converters and microcontrollers.

Use Value: Limits transient excursions to ≤234 V, preserving 200 V-rated electrolytic capacitors and MOSFETs while surviving repeated 1500 W pulses.

Use Scenario: DC bus of 3-phase inverter driving HVAC compressors, subject to regenerative braking spikes and switching noise.

IC Role / Device Role: Unidirectional TVS placed between DC+ and ground to absorb positive-going bus overvoltages.

Use Value: Clamps 10/1000 µs surges to 234 V within 1 ns, preventing gate driver latch-up and IGBT short-circuit failure during fault conditions.

Telecom Line Interface Protection

Renewable Energy Charge Controller

Use Scenario: 24 V auxiliary power feed to remote base station radios, routed alongside RF cables susceptible to induced lightning currents.

IC Role / Device Role: First-stage surge protector on DC input before DC-DC isolation and LDO regulation.

Use Value: Withstands 6.4 A peak pulse current and maintains <5 µA leakage, ensuring no impact on 100 µA sleep-mode current budgets.

Use Scenario: Solar charge controller connecting PV array to 48 V battery bank, exposed to open-circuit voltage transients up to 200 V.

IC Role / Device Role: Overvoltage clamp on PV input terminals to protect MPPT controller MOSFETs and sensing circuitry.

Use Value: Breakdown at 162–179 V provides 20–30 V design margin above 150 V nominal PV string OCV, enabling reliable field deployment.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ170A	Same V_RWM (145 V) and V_C (234 V), but lower P_PPM (600 W), SMC package (surface-mount)	Not suitable for 1500 W surge events; requires PCB redesign for SMD footprint and thermal relief	Select only if system-level testing confirms 600 W clamping suffices and board space constraints mandate SMD
1N6297A	Identical electrical specs and DO-201 package; same manufacturer, legacy JEDEC part number	No functional difference; used interchangeably in legacy designs and BOMs	Preferred for backward-compatible replacements where 1V5KE170A is unavailable

Compared with SMBJ170A and 1N6297A, the 1V5KE170A uniquely combines 1500 W surge capability in a through-hole DO-201 package-enabling high-energy protection without SMT rework-while sharing identical clamping performance with the legacy 1N6297A for drop-in qualification reuse.

Availability

1V5KE170A is available at Aetrix Electronics and suitable for industrial power supply protection, motor drive DC bus clamping, and telecom line interface protection requiring stable component supply and long-term obsolescence management.

Supply support for 1V5KE170A 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power MOSFETs since 1979.

The 1V5KE series was designed specifically for high-energy transient suppression in industrial and transportation systems, emphasizing ruggedness, repeatable clamping, and extended temperature reliability beyond commercial-grade alternatives.

FAQ

What is the maximum clamping voltage of the 1V5KE170A under standard test conditions?

The 1V5KE170A has a maximum clamping voltage (V_C) of 234 V when subjected to a 10/1000 µs waveform peak pulse current of 6.4 A. This value is measured at T_A = 25°C and defines the upper voltage limit imposed on protected circuitry during surge events. The 1V5KE170A maintains this clamping performance across its rated junction temperature range of –55°C to +175°C, with minor derating above 75°C ambient per the steady-state power curve.

Is the 1V5KE170A unidirectional or bidirectional, and how is polarity identified?

1V5KE170A is a unidirectional TVS diode, intended for DC line protection where surge polarity is known and consistent. Polarity is marked by a single cathode band on the DO-201 body; the banded end connects to the protected line (cathode), and the unbanded end connects to ground (anode). Bidirectional variants carry a "C" suffix (e.g., 1V5KE170CA) and exhibit symmetrical breakdown in both directions.

What is the reverse leakage current specification for the 1V5KE170A at its rated VRWM?

At its reverse stand-off voltage (V_RWM) of 145 V, the 1V5KE170A exhibits a maximum reverse leakage current (I_R) of 5 µA at T_A = 25°C. This low leakage ensures minimal power loss and avoids interference with high-impedance monitoring circuits or precision references. Leakage remains below 10 µA up to +125°C, supporting reliable operation in thermally demanding environments.

Can the 1V5KE170A be used in place of the legacy 1N6297A?

Yes, the 1V5KE170A is the modern replacement for 1N6297A, sharing identical electrical specifications-including V_BR (162–179 V), V_RWM (145 V), V_C (234 V), and DO-201 packaging-and fully compatible in both schematic symbol and PCB footprint. Taiwan Semiconductor confirms functional equivalence and recommends 1V5KE170A for new designs and 1N6297A for legacy BOM continuity.

What is the peak forward surge current rating for the 1V5KE170A?

The 1V5KE170A is rated for a peak forward surge current (I_FSM) of 200 A for an 8.3 ms single half-sine wave at T_A = 25°C. This rating applies only to unidirectional operation and reflects the device's ability to withstand brief inrush or fault currents without degradation. It is not intended for repetitive conduction and must be evaluated in context of system-level fusing and current-limiting design.

1V5KE170A Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Package/Case:: DO-201AE, Axial

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 145V

Voltage - Breakdown (Min):: 162V

Voltage - Clamping (Max) @ Ipp:: 234V

Current - Peak Pulse (10/1000µs):: 6.4A

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-201AE

1V5KE170A FAQ

1.How can I place an order for 1V5KE170A through Aetrix?

Please submit a Request for Quotation (RFQ) for 1V5KE170A 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 1V5KE170A reliable?

The price and inventory of 1V5KE170A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1V5KE170A is usually 5 days.

3.What payment methods are accepted for 1V5KE170A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1V5KE170A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1V5KE170A?

1V5KE170A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1V5KE170A 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 1V5KE170A?

For technical support, including 1V5KE170A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1V5KE170A requirements.

6.How does Aetrix verify that 1V5KE170A is sourced from the original manufacturer or authorized distributors?

All 1V5KE170A 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 1V5KE170A meets industry standards.

7.What is the process for return or replacement of 1V5KE170A?

All 1V5KE170A units undergo pre-shipment inspection (PSI). If there is an issue with 1V5KE170A, 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 1V5KE170A part is unused and in its original packaging.

Return procedure for 1V5KE170A:

1.Submit a request within 90 days.

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

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