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Small clear T-1 3/4 infrared LED component with two leads

YINGHUA

YINGHUA SFH4557 Infrared Transmitting Tube T-1 3/4 (5 mm) semiconductor

SKU CH-1PD2-984ER

Infrared transmitting tube in a 5 mm package with anti-interference, high-precision performance

  • Product typeICs Semicoductors
  • Anti-interference design for reliable signal transmission
  • High-precision infrared output for accurate sensing
  • T-1 3/4 (5 mm) package fits standard through-hole layouts
  • SFH4557 model suited for photoelectric applications

YINGHUA SFH4557 Infrared Transmitter

The YINGHUA SFH4557 is a new T-1 3/4 (5 mm) semiconductor component designed for infrared signal transmission. Its anti-interference construction supports high-precision photoelectric operation in demanding environments. Engineers and technicians select this tube for reliable IR emitter applications. It integrates directly into circuits requiring consistent infrared output.

Sustained-load behaviour

Under continuous operation the anti-interference design maintains stable emission characteristics without the drift seen in brief-pulse testing. Thermal equilibrium preserves the high-precision output needed for extended photoelectric sensing cycles. The tube avoids the intensity roll-off that affects standard emitters during long duty cycles. This stability suits equipment running uninterrupted infrared links.

How it compares

Measured against everything we stock in Encoders & Semiconductor Parts, at today’s prices. Recalculated every night.

Price $14.99
Cheaper than about 83% of the 1,027 comparable items (median $34.99).

Specifications

Product
Product typeICs Semicoductors

Questions about this item

Does the SFH4557 generate noticeable heat when transmitting continuously?

The SFH4557 is a low-power infrared emitter; typical forward current stays in the milliampere range, so heat build-up during all-day operation is minimal.

What external components are required to drive the SFH4557?

A current-limiting resistor matched to your supply voltage and a driver transistor or microcontroller pin capable of sourcing the needed forward current.

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