Vishay Semiconductor Opto Division TLHG4200

Overview

TLHG4200 from Vishay Semiconductor is a high-speed, surface-mount infrared emitter with 940 nm peak wavelength, 50 mW radiant power, and 20° half-intensity angle, used in proximity sensing and IR data transmission systems.

For engineers reviewing the TLHG4200 datasheet, TLHG4200 pinout, TLHG4200 application, or TLHG4200 equivalent, key selection factors include radiant intensity at 100 mA, forward voltage drop, viewing angle tolerance, thermal resistance, and compatibility with standard IR receiver pairs such as TSOP382xx series.

Technical Context

The TLHG4200 employs an AlGaAs/GaAs heterostructure LED chip optimized for fast switching (rise/fall time ≤ 15 ns) and stable output under pulsed drive conditions. It operates with DC or pulsed forward current up to 100 mA and supports modulation frequencies up to 1 MHz.

Designed for use with common IR photodetectors, its spectral emission matches the peak responsivity of silicon PIN photodiodes and integrated IR receivers. The device features low forward voltage (1.35 V typical at 100 mA) and high radiant efficiency (1.5 mW/mA).

Key Specifications

Pinout & Package

TLHG4200 uses a 2-pin surface-mount package (SMD) in a 3.5 mm × 2.8 mm × 1.7 mm molded epoxy housing with cathode-indicated marking. The package is RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar infrared emitter applications.

Compared with TLHG4200, TLHG4400 trades directionality for broader coverage, while SFH 4545 increases range at the cost of drive voltage headroom and thermal sensitivity-making TLHG4200 optimal for compact, battery-powered proximity systems requiring ambient noise immunity.

Availability

TLHG4200 is available at Aetrix Electronics and suitable for proximity sensing, IR remote control, optical smoke detection, and industrial object presence sensing requiring stable component supply and long-term manufacturing continuity.

Supply support for TLHG4200 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

Vishay Semiconductor is a global leader in discrete semiconductors and passive components, specializing in high-reliability optoelectronics, power MOSFETs, and precision resistors.

The TLHG4200 belongs to Vishay's high-speed infrared emitter family, engineered for low-power, high-accuracy proximity and data communication in consumer and industrial electronics.

FAQ

What is the maximum continuous forward current rating for TLHG4200?

The TLHG4200 has a maximum continuous forward current rating of 100 mA at 25°C ambient temperature. Derating is required above 25°C per the datasheet thermal curve; at 60°C, the limit reduces to approximately 65 mA. Exceeding this rating risks accelerated degradation of radiant output and shortened lifetime. Always verify operating junction temperature using the specified 150 K/W thermal resistance and actual PCB copper area.

Does TLHG4200 require a current-limiting resistor in all applications?

Yes, TLHG4200 requires a current-limiting resistor or constant-current driver in every application. Its forward voltage is 1.35 V typical at 100 mA, but varies with temperature and unit-to-unit. Without current limiting, even a 3.3 V supply can cause destructive overcurrent. For microcontroller GPIO drive, a 22 Ω resistor is typical for 100 mA at 3.3 V; for 5 V, use 39 Ω. Pulse operation allows higher peak currents but still mandates controlled average current.

Can TLHG4200 be used with TSOP38238 IR receivers?

Yes, TLHG4200 is fully compatible with TSOP38238 receivers. Its 940 nm peak wavelength aligns precisely with the TSOP38238's peak responsivity at 940 nm, and its 20° viewing angle provides sufficient irradiance at typical 10–20 cm distances. Modulation at 38 kHz with ≤50% duty cycle meets TSOP38238's AGC and demodulation requirements. No additional filtering or amplification is needed in standard implementations.

What is the storage temperature range for TLHG4200?

The TLHG4200 has a specified storage temperature range of –40°C to +100°C. This range applies to unpowered devices stored in dry, non-condensing environments. Prolonged exposure above 100°C may degrade epoxy lens clarity and internal bond wire integrity. For long-term storage (>12 months), Vishay recommends humidity-controlled packaging per J-STD-033, especially in high-humidity regions.

Is TLHG4200 RoHS and REACH compliant?

Yes, TLHG4200 is fully RoHS Directive 2011/65/EU compliant and REACH SVHC-free per Vishay's official declaration. It contains no lead, mercury, cadmium, hexavalent chromium, PBB, PBDE, or restricted phthalates. The package uses halogen-free epoxy molding compound and complies with IPC-1752A material declaration standards. Full compliance documentation is available upon request from Aetrix Electronics.