Light-dependent Resistor (LDR) — Model 276-1657
The cadmium sulfide (CdS) or light dependent resistor (LDR) whose resistance is inversly dependent on the amount of ambient light intensity, is known by many names including the photo resistor, photoresistor, photoconductor, photoconductive cell, or simply the photocell.
Its resistance decreases from millions of ohms in darkness to a few
hundred ohms in bright light. Each application requires an appropriate
circuit and physical setup, and some calibration may be required for the
exact lighting scenario encountered. Able to detect large or small fluctuations in light levels, it can
distinguish between one or two light bulbs, direct sunlight, total
darkness, or anything in between.
A typical structure for a photoresistor uses an active semiconductor layer that is deposited on an insulating substrate. The semiconductor is normally lightly doped to enable it to have the required level of conductivity. Contacts are then placed either side of the exposed area.
The photo-resistor, CdS, or LDR finds many uses as a low cost photo sensitive element and was used for many years in photographic light meters as well as in other applications such as smoke, flame and burglar detectors, card readers and lighting controls for street lamps.
Features:
- Quick Response
- Reliable Performance
- Epoxy Package
- Good Characteristic of Spectrum
Applications:- Photoswitch
- Photoelectric Control
- Auto Flash for Camera
- Electronic Toys
- Industrial Control
Specs:
- Coating: Resin (All)
- Voltage between Terminals @ 25° C: 100 VDC
- Power Dissipation @ 25° C: 70 mW
- Ambient Temperature Range (C): -30 - +80
- Spectral Peak: 540 nm typical
- Cell Resistance 0 Lx: 5 MOhm minimum
- Cell Resistance 10 Lx: Min 20 kOhms - 60 kOhms
- Gamma 100/10: 0.75 typical
- Pre-historic Error (Change PE) @ 1 Lx: +0.10 for 30 sec typical
- Pre-historic Error (Change PE) @ 1 Lx: +0.15 for 120 sec typical
- Color Temperature Error (Change CE @ 10 Lx): -0.15 typical
- Response Time @ 10 Lx: 40 ms Rise typical
- Response Time @ 10 Lx: 30 ms Decay typical
Specifications are typical; individual units might vary.
TYPE ILLUMINATION @ RESISTANCE ILLUMINATION @ RESISTANCE
P722-7R: ......... 1 Lux .....@.. 13 kOhms ..... 100 Lux ....@... 900 kOhms
P722-5R: ......... 1 Lux .....@.. 15 kOhms ..... 100 Lux ....@... 1.1 kOhms
P1201: ........... 1 Lux .....@. 120 kOhms ..... 100 Lux ....@..... 7 kOhms
P201D-7R: ........ 1 Lux .....@. 130 kOhms ..... 100 Lux ....@..... 8 kOhms
P201D-5R: ........ 1 Lux .....@. 160 kOhms ..... 100 Lux ....@..... 9 kOhms
CELL RESISTANCE
POWER VOLT.BETWEEN 10 LX RESPONSE TIME
TYPE DISSIPATION TERMINALS 0 LX MIN~MAX RISE DECAY
P722-7R: .. 150 mW ... 200 VDC . 0.5 MOhms . 2.5~7.5 kOhms ... 50 ms . 40 ms
P722-5R: ... 70 mW ... 100 VDC . 0.5 MOhms . 5.3~15 kOhms ... 50 ms . 40 ms
P1201: ..... 70 mW ... 100 VDC ... 5 MOhms .. 20~60 kOhms ... 40 ms . 30 ms
P201D-7R: . 100 mW ... 200 VDC .. 20 MOhms .. 23~67 kOhms ... 50 ms . 20 ms
P201D-5R: .. 50 mW ... 100 VDC .. 20 MOhms .. 48~140 kOhms ... 50 ms . 20 ms
*Prices subject to change without notice. We reserve the right to limit quantities.
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Age
0+
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Part No
2761657
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Manufacturer
-
Stock No
BTZ-1102
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SKU No
236074
Limited Stock Available To purchase, Please contact our Sales Department
(+1-416-494-8999) or email shop@sayal.com
