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HC77AY-1 AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

HC77AY-1 product

HC77AY-1

Thermal Cutoffs (Thermal Fuses and Breakers)

Thermal CutoffBattery ProtectionBourns

The HC77AY-1 is a miniature thermal cutoff (TCO) breaker from Bourns, specifically engineered for high-current battery protection in portable electronics.

Best for

  • Battery cell protection
  • Notebook PCs
  • Tablet PCs

Avoid if

  • Reflow soldering processes
  • High-vibration environments without proper mounting

Check before use

  • Welding specifications
  • Thermal contact efficiency

Key specifications

Trip Temperature
77 °C ± 5 °C
Contact Rating
25 A @ 9 VDC
Max Breaking Current
80 A @ 5 VDC

Compliance & Environment

RoHS
ROHS3 Compliant
REACH
-
MSL
-
ECCN
EAR99
HTSUS
8536200040.0

Application

Battery Protection

Datasheet

Bourns-company-36.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for HC77AY-1: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol
Schematic symbol for your EDA tool
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PCB Footprint
Land pattern for PCB layout
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3D Model
STEP file for mechanical design
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KiCad Library
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Where to Buy

Real-time and catalog pricing from verified distributors

Live prices updated on demand · Catalog (~) prices may differ

Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

It is a miniature thermal cutoff (TCO) device used for overtemperature and overcurrent protection in lithium polymer and prismatic battery cells.