All Products
- Mechanical Products & Tools
- Access, Storage & Material Handling
  Access, Storage & Material Handling
  - Ladders & Steps(95)
  - Material Lifting & Loading Equipment(305)
  - Storage & Shelving(922)
  - Transit & Equipment Cases(334)
  - Trucks, Trolleys & Lifting Tables(164)
- Adhesives, Sealants & Tapes
  Adhesives, Sealants & Tapes
  - Adhesive, Sealant & Tape Dispensers(117)
  - Adhesives & Glues(148)
  - Sealants & Resins(153)
  - Tapes(1767)
- Bearings & Seals
  Bearings & Seals
  - Gaskets, Seals & Packings(5286)
  - Linear Motion(1192)
  - Rotary Bearings & Housing Units(9562)
- Engineering Materials & Industrial Hardware
  Engineering Materials & Industrial Hardware
  - Anti Vibration & Levelling Components(1890)
  - Carbon Fibre & Felt Sheets(7)
  - Castors & Wheels(1592)
  - Ceramic Materials(25)
  - Channel Support Systems(140)
  - Conveyor Components(378)
  - Insulation Materials(85)
  - Knobs, Levers & Handles(737)
  - Metal Materials(402)
  - Plastic & Rubber Materials(553)
  - Polishing & Finishing(31)
  - Shim Stock(92)
  - Structural Systems(1377)
- Fasteners & Fixings
  Fasteners & Fixings
  - Clips & Springs(1137)
  - Girder Fixings(87)
  - Magnets & Magnetic Strips(379)
  - Nails & Rivets(652)
  - Nuts & Washers(1326)
  - Pins, Keys & Retaining Clips(274)
  - Screws & Bolts(6976)
  - Sheet Metal & Panel Fasteners(200)
  - Spacers & Standoffs(1149)
  - Wall Plugs, Fixings & Anchors(616)
- Hand Tools
  Hand Tools
  - Cable, Connector & Crimping Tools(1903)
  - Clamps & Vices(380)
  - Hammers & Demolition(578)
  - Knives, Scissors & Saws(677)
  - Manual Grease Guns & Accessories(26)
  - Measuring & Marking(1004)
  - Pliers & Cutters(2578)
  - Sanding, Filing & Polishing(750)
  - Screwdrivers, Hex & Torx Keys(6864)
  - Spanners, Sockets & Wrenches(8344)
  - Specialist Tools(1219)
  - Staplers & Riveters(50)
  - Threading Tools(929)
  - Tool Kits & Tool Storage(1355)
- Mechanical Power Transmission
  Mechanical Power Transmission
  - Belts & Pulleys(4367)
  - Brakes & Clutches(55)
  - Bushes & Collars(727)
  - Electric Actuators(949)
  - Gears & Racks(427)
  - Lead Screws, Ball Screws & Ball Splines(112)
  - Power Transmission Couplings(1218)
  - Roller Chains & Accessories(365)
- Plumbing & Pipeline
  Plumbing & Pipeline
  - Hose Pipe & Fittings(1960)
  - Pipes & Pipe Fittings(1699)
  - Pipework Maintenance & Water Treatment(121)
  - Sinks, Toilets & Showers(21)
  - Valves & Taps(2193)
  - Water Heating & Pumps(363)
- Pneumatics & Hydraulics
  Pneumatics & Hydraulics
  - Automated Air Blowers(22)
  - Compressed Air Piping Systems(192)
  - Hydraulic Cylinders, Pumps & Power Units(190)
  - Hydraulic Fittings & Tubing(744)
  - Hydraulic Fluids & Filtration(131)
  - Hydraulic Instrumentation & Switches(136)
  - Hydraulic Tools(7)
  - Hydraulic Valves & Manifolds(193)
  - Pneumatic & Hydraulic Pressure Gauges(4239)
  - Pneumatic Air Preparation(2950)
  - Pneumatic Connectors, Fittings & Hose(8316)
  - Pneumatic Counters, Logic Controllers & Timers(75)
  - Pneumatic Cylinders & Actuators(7984)
  - Pneumatic Sensors & Switches(1119)
  - Pneumatic Valves(5111)
  - Vacuum Components(1261)
- Power Tools, Soldering & Welding
  Power Tools, Soldering & Welding
  - Air Tools(259)
  - Drill Bits & Parts(2192)
  - Milling & Lathing(401)
  - Power Tool Accessories(298)
  - Power Tools(1043)
  - Sanding Belts, Discs & Wheels(870)
  - Soldering(2042)
  - Welding & Brazing(110)
  - Workshop Tools(413)
- Electrical, Automation & Cables
- Automation & Control Gear
  Automation & Control Gear
  - Automation Signalling(5166)
  - Contactors & Auxiliary Contacts(9011)
  - Electric Motors(10058)
  - Industrial Robots(23)
  - PLCs, HMIs & Industrial Computing(6696)
  - Process Control(7943)
  - Sensors(22891)
  - Solenoids(175)
- Cables & Wires
  Cables & Wires
  - AV Cables(1468)
  - Cable Glands & Fittings(1818)
  - Cable Joints & Cable Sleeving(2797)
  - Cable Management(6071)
  - Cable Ties & Fixings(2882)
  - Computer Cables(1235)
  - Electrical Power & Industrial Cables(11255)
  - Networking & Coaxial Cables(6375)
  - Ribbon & Flat Cable(1)
  - Single Core Cable(4277)
  - Wire to Board Cables & Ribbon Cable(7498)
- Enclosures & Server Racks
  Enclosures & Server Racks
  - 19-Inch Racking(713)
  - Enclosures(11286)
  - Enclosures & Racking Components(7470)
- Fuses & Circuit Breakers
  Fuses & Circuit Breakers
  - Circuit Breakers(17815)
  - Earth & Lightning Protection(92)
  - Fuse Holders & Accessories(1159)
  - Fuses(7652)
- HVAC, Fans & Thermal Management
  HVAC, Fans & Thermal Management
  - Air Conditioning & Fans(2353)
  - Air Conditioning & Heating Accessories(1442)
  - Electronics Heating & Cooling Components(1604)
  - Fan Accessories(414)
- Lighting
  Lighting
  - Fluorescent Lamps & Tubes(1)
  - Light Bulbs, Lamps & Tubes(1507)
  - Light Fittings, Fixtures & Luminaires(1037)
  - Lighting Components(219)
  - Torches & Inspection Lamps(466)
- Relays & Signal Conditioning
  Relays & Signal Conditioning
  - Relay Accessories(887)
  - Relays(12469)
  - Signal Conditioners & Isolators(704)
- Switches
  Switches
  - Capacitive, Magnetic and Piezo Switches(947)
  - DIP & Rotary Encoded Switches(1241)
  - Domestic Installation Switches(1070)
  - Foot Switches & Components(238)
  - Joysticks & Components(240)
  - Key Switches & Selector Switches(1832)
  - Keyboard & Keypad Switches(1757)
  - Limit & Position Switches(2320)
  - Micro Switches & Detector Switches(2128)
  - Push Button Switches & Components(13248)
  - Rocker Switches & Components(993)
  - Rope Pull Switches & Components(298)
  - Rotary Switches & Components(1100)
  - Safety Enabling & Control Switches(99)
  - Safety Interlock Switches & Components(1477)
  - Switch Disconnectors & Components(5330)
  - Toggle Switches & Slide Switches(2192)
- Electronics Components, Power & Connectors
- Batteries & Chargers
  Batteries & Chargers
  - Battery & Charger Accessories(645)
  - Battery Chargers & Power Banks(227)
  - Non-Rechargeable Batteries(361)
  - Rechargeable Batteries(441)
- Connectors
  Connectors
  - AV Connectors(3257)
  - Automotive Electrical Connectors(4516)
  - Backplane & Rack Connectors(1382)
  - Circular Connectors(24373)
  - IC Sockets & Adapters(725)
  - Mains & DC Power Connectors(4048)
  - Network & Telecom Connectors(3126)
  - PCB Connectors & Wire Housings(42936)
  - Power Connectors(8734)
  - RF Coaxial Connectors & Adapters(4870)
  - Terminal Blocks(23352)
  - USB, D Sub & Computing Connectors(9359)
  - Wire Terminals & Splices(6238)
- Displays & Optoelectronics
  Displays & Optoelectronics
  - Display Modules(1986)
  - Fibre Optic Components(235)
  - Indicators & Indicator Components(4244)
  - LED Lighting Components(5452)
  - LEDs - Light Emitting Diodes(6519)
  - Laser Modules & Components(253)
  - Optocouplers & Photodetectors(4680)
- ESD Control, Cleanroom & PCB Prototyping
  ESD Control, Cleanroom & PCB Prototyping
  - ESD Control & Clean Room(839)
  - PCB Etching, Preparation & Developing(42)
  - PCB Handling(87)
  - PCB Spacers, Pillars & Supports(882)
  - PCB Tools(131)
  - Prototyping Boards(741)
- Passive Components
  Passive Components
  - Antennas(1894)
  - Capacitors(42505)
  - Crystals, Oscillators & Resonators(4053)
  - EMI Filters & Protection(6627)
  - Fixed Resistors(47248)
  - Inductors(10458)
  - Passive Components Kits(331)
  - Rotary Encoders(357)
  - Sounder, Buzzer & Microphone Components(843)
  - Surge Protection Components(3692)
  - Variable Resistors(4934)
- Power Supplies & Transformers
  Power Supplies & Transformers
  - Power Supplies(8429)
  - Renewable Energy(93)
  - Transformers(3052)
  - Voltage Converters(14468)
- Raspberry Pi, Arduino, ROCK & Development Tools
  Raspberry Pi, Arduino, ROCK & Development Tools
  - Arduino Shop(216)
  - BBC micro:bit Shop(170)
  - Development Tools & Single Board Computers(5587)
  - ROCK SBC Shop(35)
  - Raspberry Pi Shop(373)
  - STEM education(84)
- Semiconductors
  Semiconductors
  - Amplifiers & Comparators(5745)
  - Audio & Video ICs(133)
  - Chip Programmers & Debuggers(136)
  - Clock, Timing & Frequency ICs(1219)
  - Communication & Wireless Module ICs(1102)
  - Data Converters(1601)
  - Discrete Semiconductors(40667)
  - Interface ICs(3698)
  - Logic ICs(5080)
  - Memory Chips(2493)
  - Power Management ICs(15333)
  - Processors & Microcontrollers(7531)
  - Programmable Logic ICs(158)
  - Sensor ICs(3344)
- IT, Test & Safety Equipment
- Computing & Peripherals
  Computing & Peripherals
  - 3D Printing & Scanning(209)
  - Audio & Video(618)
  - Barcode Scanners & Accessories(82)
  - Car Technology(8)
  - Computer Components & Software(1228)
  - Keyboards & Mice(301)
  - Labelling(1792)
  - Memory & Data Storage(1843)
  - Mobile Computing(124)
  - Networking & WiFi(1639)
  - Phones & Walkie Talkies(91)
  - Photography & Drones(23)
  - Printing & Scanning(383)
  - Remote Controls(140)
- Facilities Cleaning & Maintenance
  Facilities Cleaning & Maintenance
  - Brushes(308)
  - Cleaning Equipment(98)
  - Cleaning Sprays & Fluids(88)
  - Electronics Cleaners & Protective Coatings(166)
  - Floor Cleaning(680)
  - Greases, Oils & Lubricants(439)
  - Paint & Painting Supplies(173)
  - Washroom Equipment & Supplies(350)
  - Waste & Recycling(204)
  - Wipes & Cloths(499)
- Office Supplies
  Office Supplies
  - Desk Organisation(49)
  - Filing(97)
  - Office Equipment(102)
  - Office Furniture(297)
  - Paper & Consumables(656)
  - Posting & Packaging(117)
  - White Boards, Notice Boards & Planners(144)
  - Writing & Drawing Supplies(175)
- Personal Protective Equipment & Workwear
  Personal Protective Equipment & Workwear
  - Arm & Knee Protection(96)
  - Disposable Workwear(330)
  - Ear Protection(209)
  - Eye & Face Protection(828)
  - Fall Protection(371)
  - Hand Protection(2703)
  - Head Protection(443)
  - Hi Vis Clothing(1118)
  - Respiratory Protection(331)
  - Safety Footwear(3796)
  - Workwear(4050)
- Security & Ironmongery
  Security & Ironmongery
  - CCTV & Security Surveillance(157)
  - Door Control & Seals(369)
  - Key Cabinets & Safes(133)
  - Latches, Hinges & Handles(825)
  - Locks & Bolts(1009)
  - Security Alarms & Sensors(301)
- Site Safety
  Site Safety
  - Fire Safety(163)
  - First Aid(100)
  - Lockout Tagout(399)
  - Safety Flooring(155)
  - Safety Signs(589)
  - Spillage Control(292)
  - Traffic Management & Crowd Control(461)
- Test & Measurement
  Test & Measurement
  - Bench Power Supplies & Sources(884)
  - Data Acquisition & Logging(806)
  - Electrical Test & Measurement(1121)
  - Electronic Component Testing(203)
  - Engineering Test & Measurement(621)
  - Environmental Test & Measurement(674)
  - Lab Equipment(785)
  - Linear Test & Measurement(11)
  - Multimeters & Accessories(825)
  - Network Test & Measurement(286)
  - Oscilloscopes & Accessories(1289)
  - Pressure Test & Measurement(194)
  - RF Test & Measurement(181)
  - Signal Generators & Analysers(348)
  - Speed Test & Measurement(68)
  - Temperature Test & Measurement(1166)
  - Test Connectors(2446)
  - Test Leads & Test Lead Kits(1206)
  - Weight & Force Test & Measurement(655)
Our Brands
- Top Brands
- All Brands
New Products
My Account
Our Services

Optocouplers & Photodetectors

HK$11.856 Each (In a Pack of 5) Real time qty checker Compare	ST23G, C Kodenshi, ST 30 ° IR Phototransistor, Through Hole 2-Pin 5mm (T-1 3/4) package Spectrums DetectedInfrared Typical Fall Time4.8µs Typical Rise Time3.2µs Maximum Light Current20000µA Maximum Dark Current100nA See similar products in Phototransistors	RS Stock No. 455-8014 Brand Kodenshi Mfr. Part No. ST23G, C
HK$22.594 Each (In a Pack of 5) Real time qty checker Compare	SG2BC, BCD Kodenshi, SG Reflective Optical Sensor, Phototransistor Output Output DevicePhototransistor Typical Rise Time30µs Typical Fall Time30µs Number of Pins4 Maximum Operating Temperature+90°C See similar products in Reflective Optical Sensors	RS Stock No. 455-0975 Brand Kodenshi Mfr. Part No. SG2BC, BCD
HK$48.128 Each (In a Pack of 5) Real time qty checker Compare	SG211 Kodenshi, Through Hole Slotted Optical Switch, Phototransistor Output Output DevicePhototransistor Number of Channels1 Typical Rise Time50µs Typical Fall Time50µs Mounting TypeThrough Hole See similar products in Slotted Optical Switches	RS Stock No. 455-0925 Brand Kodenshi Mfr. Part No. SG211

Optocouplers & Photodetectors

CATEGORIES