HC4E-HTM-AC240V Datasheet – PCB Relay, AC240V ( PDF )

Part Number: HC4E-HTM-AC240V

Function: 4 Form C, Amber HCE-relay.

Package: MT Module type

Manufacturer: Panasonic Corporation

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HC4E-HTM-AC240V datasheet

Description

HC4E-HTM-AC240V is a general-purpose PCB relay designed for high-reliability switching applications, featuring a 240VAC coil and multiple configuration options. It is suitable for industrial control, automation systems, and consumer electronics where robust isolation and switching capability are required.

Features

  • Coil voltage: 240VAC
  • Available in standard, amber sealed, and latching (keep) types
  • Optional configurations with LED indicator, diode, and CR suppression circuit
  • Multiple mounting types: PCB mount, plug-in, and terminal (TM) type
  • High insulation and dielectric strength
  • Compatible sockets and terminal bases available

Functional Description

  • Electromechanical relay that uses an AC coil to actuate contacts
  • Provides galvanic isolation between control and load circuits
  • Supports switching of AC or DC loads depending on contact rating
  • Variants with indicators and suppression components simplify system design

Design Notes

  • Ensure proper coil drive voltage (AC 240V) with tolerance consideration
  • Use snubber circuits (RC or MOV) when switching inductive loads
  • Allow sufficient PCB creepage/clearance for high-voltage operation
  • Consider sealed type for harsh environments (dust, humidity)
  • Verify inrush current capability for loads like motors or lamps

How to Choose This Relay

  • Select based on coil voltage (AC vs DC) and control system compatibility
  • Verify contact rating vs load type (resistive, inductive, capacitive)
  • Choose sealed type for reliability in harsh environments
  • Consider versions with built-in suppression for noise-sensitive designs
  • Check mechanical footprint compatibility with PCB or socket

Typical Applications

  • Factory automation and industrial control systems
  • Power supply equipment and control panels
  • Machine tools, welding equipment, and molding machines
  • Office equipment and vending machines
  • Telecommunication and disaster prevention systems
  • Medical and measurement devices
  • Household appliances and consumer electronics

Alternative / Equivalent Products

  • Omron MY2 series (general-purpose relay)
  • Finder 40 series relays
  • Panasonic JW series relays
  • Songle SRD series (cost-effective alternative)

Other data sheets are available within the file:

HC4E-HTM-AC100V, HC4E-HTM-AC120V, HC4E-HTM-AC12V, HC4E-HTM-AC200V

HC4E-HTM-AC240V Datasheet PDF Download

HC4E-HTM-AC240V pdf

 

CV203 Datasheet PDF – Car Radio Audio Amplifer

Part Number: CV203 ( = TDA2003 )

Function: Car Radio Audio Amplifer

Package: TO-220-5 Pin, Pentawatt 5 Pin Type

Manufacturer: Huajing Microelectronics

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CV203 datasheet

Description

The CV203 is Car radio audio amplifier.

The TDA2003 has improved performance with the same pin configuration as the TDA2002. The additional features of TDA 2002, very low number of external components, ease of assembly, space and cost saving, are maintained. The device provides a high output current capability (up to 3.5A) very low harmonic and cross-over distortion. Completely safe operation is guaranteed due to protection against DC and AC short circuit between all pins and ground, thermal over-range, load dump voltage surge up to 40V and fortuitous open ground.

Pinout

CV203 pinout

Pin Configuration (TO-220-5)

  • Pin 1: Non-inverting input (+)
  • Pin 2: Inverting input (−)
  • Pin 3: Ground
  • Pin 4: Output
  • Pin 5: Supply voltage (VS)

Key Features

  • High output current capability: up to 3.5A
  • Low harmonic distortion
  • Low crossover distortion
  • Wide supply voltage range (typically 8V–18V, up to 28V absolute max)
  • Low external component count
  • Same pinout as TDA2002 (drop-in replacement)

Applications

  • Car audio amplifiers
  • Portable speakers
  • TV audio output stages
  • DIY audio amplifier projects
  • Alarm and announcement systems

Alternative Devices

  • TDA2002 (lower power predecessor)
  • TDA2030 (higher power, dual supply capable)
  • LM1875 (hi-fi class alternative)
  • TDA2050 (higher output power)

CV203 Datasheet PDF