1.5KE440A

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1.5KE440A

+BOM

TVS, 376V, 1500W Uni

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Specifications

Attribute Value
Supplier DComponents
Package / Case Tape & Reel (TR)
Part Status Active
Type Zener
Unidirectional Channels 1
Voltage - Reverse Standoff (Typ) 376V
Voltage - Breakdown (Min) 418V
Voltage - Clamping (Max) @ Ipp 602V
Current - Peak Pulse(10 / 1000µs) 2.6A
Power - Peak Pulse 1500W (1.5kW)
Power Line Protection No
Applications General Purpose
Operating Temperature -50°C ~ 175°C (TJ)
Mounting Type Through Hole

Overview

Description

1.5KE440A is a high-power transient-voltage-suppression (TVS) diode from the 1.5KE family. It protects high‑voltage power electronics from voltage spikes by clamping surges quickly to safe levels. Key specs (typical): about 1500 W peak pulse power (10/1000 μs), and a working standoff voltage VRWM around 440 V. The breakdown voltage is near the mid‑400 V to 500 V range, and the clamped voltage depends on surge current (generally well above VRWM). Response time is essentially instantaneous (nanoseconds). Applications include protecting DC buses, AC mains interfaces, power supplies, motor drives, solar inverters, and telecom equipment. When selecting, verify whether the variant is unidirectional or bidirectional and consult the datasheet for exact VBR, VCL, and peak pulse current ratings for your specific use case.

Equivalent

1.5KE440A is a 1500 W bidirectional transient voltage suppressor (TVS) diode with about 440 V rating. Direct equivalent: Littelfuse 1.5KE440A. Other brands offer similar 440 V, ~1.5 kW bidirectional TVS parts (e.g., Vishay/Nexperia/Bourns in the same power class). When substituting, compare VR (standoff), VBR, IPP, and package. Use a cross-reference from the distributor to ensure exact electrical/footprint fit.

Features

Here are the key features of the 1.5KE440A transient voltage suppressor (TVS) diode:
- 1500 W peak pulse power (8/20 µs)
- Stand-off voltage VR = 440 V
- Breakdown voltage VBR typically ~468–540 V (range per datasheet)
- Clamping voltage VC at IPP around ~700–780 V
- Fast response time (essentially instantaneous, nanosecond-scale)
- Low leakage current at VR (microamps typical)
- Operating case temperature range: -55°C to +125°C
- RoHS compliant (lead-free)
- Suitable for high-energy surge suppression on power lines, telecom, and DC bus applications
Note: Verify the exact VBR and VC tolerances in the official datasheet for your batch, and confirm whether your application requires a unidirectional or bidirectional variant.

Pinout

- Pin count: 2 terminals (2-pin device)
- Function: High-power transient voltage suppressor diode (TVS) used for surge protection; unidirectional type in the 1.5KE family with about 440 V working standoff and ~1500 W peak pulse power.

Manufacturer

Manufacturer: Littelfuse.
What kind of company: A global electronics company specializing in circuit protection components, including fuses and TVS diodes (such as the 1.5KE440A). Founded in 1927 and headquartered in Chicago, USA.

Application

1.5KE440A is a high-energy TVS diode (≈1500 W peak pulse) with a nominal standoff around 440 V. Typical application areas include:
- Surge protection for 230 VAC mains circuits
- Protection of high-voltage DC rails (≈400–450 V) in SMPS, inverters, motor drives, and HV power supplies
- Transient protection for telecom/datacom and industrial control equipment
- Input-stage protection for solar inverters, UPS, and other HV DC systems
- General HV transient suppression in equipment exposed to external surges

Package

Through-hole axial package. The 1.5KE440A is a high-power TVS diode in a DO-204 (axial) style package (vendor variants may label it DO-204AA/AB).

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