Bipolar phototransistor VTT9814FH

switchingsilicon

Product Overview
The VTT9814FH is a silicon phototransistor housed in a T 1¾ flat package with an integrated IR‑blocking feature. Designed for a strong response in the visible spectral range (450–700 nm), it serves as a RoHS‑compliant alternative to cadmium sulfide (CdS) photocells. The device provides a narrow light current tolerance appropriate for ambient light control around 50–100 fc (500–1000 lux).

Features & Benefits

• Visible light response with IR blocking to reduce infrared interference
• Low dark current for improved sensitivity in low light
• RoHS‑compliant alternative to CdS photocells

Applications

• Street lighting switching and control
• Interior/exterior light control (dusk/dawn switches)
• Automotive headlight dimming systems
• Display contrast and brightness control
• Energy management and conservation systems

Technical specifications

• Active area = 0.192 mm²
• Short Circuit Current = Minimum 80 µA, Maximum 120 µA at 100 fc, 2850 K
• Dark Current = Maximum 50 nA at 5 V VCE
• Spectral Range = 450 nm to 700 nm
• Peak Spectral Response = 585 nm
• Sensitivity at peak Wavelength = Typical 7 A/W
• Angular Response = ±50 Degrees at 50% Response
• Soldering Temperature = Maximum 260°C