Switching phototransistor VTT9814FH

for automotive applicationssilicon

Overview
The VTT9814FH is a silicon phototransistor packaged in an infrared‑blocking, flat T 1¾ end‑looking housing. It provides a strong response across the visible spectrum (450–700 nm) and is offered as a RoHS‑compliant alternative to cadmium sulphide photocells.

Details
The device integrates the proven VTT silicon phototransistor die with an IR‑blocking feature incorporated into the epoxy package. The part exhibits a narrow light‑current tolerance for consistent performance. Typical ambient‑light control range is approximately 500–1000 lux (50–100 fc).

Features & Benefits

• Visible‑light response with IR‑blocking provided by the epoxy casting
• Low dark current for reliable sensing in low light
• RoHS‑compliant alternative to CdS photocells

Applications

• Street lighting control and switching
• Interior and exterior dusk/dawn light control
• Automotive headlight dimming circuits
• Display contrast and backlight control
• Energy‑saving lighting systems

Technical specifications

• Active area: 0.192 mm²
• Short‑circuit current: 80–120 µA (at 100 fc, 2850 K)
• Dark current: ≤50 nA (VCE = 5 V)
• Spectral range: 450–700 nm
• Peak spectral response: 585 nm
• Sensitivity at peak wavelength: typ. 7 A/W
• Angular response: ±50° (50% response)
• Maximum soldering temperature: 260 °C