{"title":"Transistors","description":"","products":[{"product_id":"bc557-pnp-transistor","title":"BC557 PNP Transistor","description":"\u003ch3\u003e\u003cspan\u003e🔧 Key Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePNP Bipolar Junction Transistor (BJT)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for reliable signal control\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eHigh current gain (hFE: 110–800)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for efficient amplification\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCollector current up to 100mA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – suitable for low-power circuits\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eLow voltage operation (up to 45–65V)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for safe, stable performance\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eCompact \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eTO-92 package\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for easy PCB mounting\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003e⚙️ Technical Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003eTransistor Type: PNP\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaximum Collector Current (Ic): 100mA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCollector-Emitter Voltage (Vce): up to 45V–65V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower Dissipation: 500mW\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTransition Frequency: ~150MHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage: TO-92\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K-TECHNICS","offers":[{"title":"Default Title","offer_id":42881653342279,"sku":null,"price":10.0,"currency_code":"KES","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/BC557_1.jpg?v=1781606371"},{"product_id":"bc547-npn-transistor","title":"BC547 NPN Transistor","description":"\u003ch3\u003e\u003cspan\u003e🔧 Key Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eType:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e NPN Bipolar Junction Transistor (BJT)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eHigh Gain Performance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e DC current gain (hFE) up to 800\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eLow Power Operation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Ideal for small-signal applications\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCompact Design:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e TO-92 package for easy PCB mounting\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eFast Switching:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Suitable for moderate-speed circuits\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003e⚡ Technical Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCollector-Emitter Voltage (Vce):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 45V\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCollector-Base Voltage (Vcb):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 50V\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eEmitter-Base Voltage (Veb):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 6V\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMax Collector Current (Ic):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 100mA\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePower Dissipation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 500mW\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTransition Frequency:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ~300MHz\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eOperating Temperature:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e -55°C to +150°C\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K-TECHNICS","offers":[{"title":"Default Title","offer_id":42881654095943,"sku":null,"price":5.0,"currency_code":"KES","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/BC547_1.jpg?v=1781606934"},{"product_id":"bc558-pnp-transistor","title":"BC558 PNP Transistor","description":"\u003cp\u003eThe BC558 is a low-power, general-purpose PNP transistor built for efficient signal amplification and switching. Its compact TO-92 design makes it perfect for prototyping and permanent PCB installations.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e🔧 Key Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eType:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e PNP Bipolar Junction Transistor (BJT)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePackage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e TO-92 (through-hole, easy to use on breadboards)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCollector Current (IC):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Up to 100mA\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCollector-Emitter Voltage (VCE):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Up to 25–30V\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eHigh Gain (hFE):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Up to 800 (variant dependent)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eLow Power Consumption:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approx. 500mW max dissipation\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"K-TECHNICS","offers":[{"title":"Default Title","offer_id":42881654259783,"sku":null,"price":5.0,"currency_code":"KES","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/BC558_1.png?v=1781607580"},{"product_id":"phototransistor-3du33-high-sensitivity-light-sensor-npn-silicon","title":"Phototransistor 3DU33 – High Sensitivity Light Sensor (NPN Silicon)","description":"\u003cp\u003eThe \u003cstrong data-start=\"175\" data-end=\"200\"\u003e3DU33 Phototransistor\u003c\/strong\u003e is a compact, high-sensitivity \u003cstrong data-start=\"232\" data-end=\"262\"\u003esilicon NPN optical sensor\u003c\/strong\u003e designed to convert light (especially infrared around 880nm) into a proportional electrical signal. It is widely used in automation, robotics, and electronic detection systems where reliable light sensing is required.\u003c\/p\u003e\n\u003ch3 data-section-id=\"nucr17\" data-start=\"982\" data-end=\"1010\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul data-start=\"1011\" data-end=\"1349\"\u003e\n\u003cli data-section-id=\"11l6eea\" data-start=\"1011\" data-end=\"1048\"\u003eType: Silicon NPN Phototransistor\u003c\/li\u003e\n\u003cli data-section-id=\"a7ydop\" data-start=\"1049\" data-end=\"1082\"\u003eOperating Voltage: Max 10V DC\u003c\/li\u003e\n\u003cli data-section-id=\"u9oio8\" data-start=\"1083\" data-end=\"1120\"\u003eReverse Breakdown Voltage: 15V DC\u003c\/li\u003e\n\u003cli data-section-id=\"10l6x0g\" data-start=\"1121\" data-end=\"1146\"\u003eDark Current: ~0.3 µA\u003c\/li\u003e\n\u003cli data-section-id=\"2859yw\" data-start=\"1147\" data-end=\"1205\"\u003eLight Current: 0.5 – 1 mA (typical under illumination)\u003c\/li\u003e\n\u003cli data-section-id=\"1vyppqp\" data-start=\"1206\" data-end=\"1257\"\u003ePeak Wavelength Sensitivity: ~880 nm (IR range)\u003c\/li\u003e\n\u003cli data-section-id=\"fomic\" data-start=\"1258\" data-end=\"1290\"\u003ePackage: Through-hole, 2-pin\u003c\/li\u003e\n\u003cli data-section-id=\"3ys0xh\" data-start=\"1291\" data-end=\"1349\"\u003eOutput: Analog current proportional to light intensity\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K-TECHNICS","offers":[{"title":"Default Title","offer_id":42881673166919,"sku":null,"price":200.0,"currency_code":"KES","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/3DU33_1.jpg?v=1781607690"},{"product_id":"tcrt5000l-infrared-ir-reflective-sensor-module","title":"TCRT5000L Infrared (IR) Reflective Sensor Module","description":"\u003cp data-start=\"379\" data-end=\"717\"\u003eThis sensor combines an \u003cstrong data-start=\"403\" data-end=\"427\"\u003einfrared LED emitter\u003c\/strong\u003e and a \u003cstrong data-start=\"434\" data-end=\"462\"\u003ephototransistor receiver\u003c\/strong\u003e in a single leaded package, enabling it to detect reflected infrared light from nearby objects. When an object or surface is within range, the emitted IR light reflects back into the phototransistor, generating a measurable signal for accurate detection.\u003c\/p\u003e\n\u003cp data-start=\"719\" data-end=\"908\"\u003ePerfect for robotics, automation systems, and DIY electronics, the TCRT5000L is widely used in \u003cstrong data-start=\"814\" data-end=\"907\"\u003eline-following robots, encoder wheels, obstacle detection, and proximity sensing projects\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1k47yra\" data-start=\"1470\" data-end=\"1492\"\u003eTechnical Overview\u003c\/h3\u003e\n\u003cp data-start=\"1493\" data-end=\"1797\"\u003eThe TCRT5000L operates by emitting infrared light at around \u003cstrong data-start=\"1553\" data-end=\"1573\"\u003e950nm wavelength\u003c\/strong\u003e and measuring the reflected signal from nearby surfaces. It performs best at very close distances (typically \u003cstrong data-start=\"1683\" data-end=\"1700\"\u003e0.2mm to 15mm\u003c\/strong\u003e, with optimal performance around 2.5mm), making it ideal for precision reflective sensing tasks.\u003c\/p\u003e","brand":"K-TECHNICS","offers":[{"title":"Default Title","offer_id":42881675427911,"sku":null,"price":50.0,"currency_code":"KES","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/tcrt5000l_1.webp?v=1781608059"},{"product_id":"pc817-optocoupler-optoisolator-4-pin-dip","title":"PC817 Optocoupler \/ Optoisolator – 4 Pin DIP","description":"\u003cp\u003eThe \u003cstrong data-start=\"192\" data-end=\"228\"\u003ePC817 Optocoupler (Optoisolator)\u003c\/strong\u003e is a reliable, low-cost component designed to provide \u003cstrong data-start=\"283\" data-end=\"362\"\u003eelectrical isolation between two circuits using infrared light transmission\u003c\/strong\u003e. It is widely used in microcontroller interfaces, power electronics, industrial control systems, and signal protection circuits.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1iz91iu\" data-start=\"966\" data-end=\"982\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"983\" data-end=\"1216\"\u003e\n\u003cli data-section-id=\"xhki5y\" data-start=\"983\" data-end=\"1019\"\u003eHigh isolation voltage up to 5kV\u003c\/li\u003e\n\u003cli data-section-id=\"1twjrnq\" data-start=\"1020\" data-end=\"1049\"\u003eCompact 4-pin DIP package\u003c\/li\u003e\n\u003cli data-section-id=\"g01t9i\" data-start=\"1050\" data-end=\"1095\"\u003eInfrared LED + NPN phototransistor inside\u003c\/li\u003e\n\u003cli data-section-id=\"16gxf7u\" data-start=\"1096\" data-end=\"1135\"\u003eExcellent electrical noise immunity\u003c\/li\u003e\n\u003cli data-section-id=\"1lawneu\" data-start=\"1136\" data-end=\"1161\"\u003eLow power consumption\u003c\/li\u003e\n\u003cli data-section-id=\"738s9t\" data-start=\"1162\" data-end=\"1199\"\u003eHigh current transfer ratio (CTR)\u003c\/li\u003e\n\u003cli data-section-id=\"tg1v5t\" data-start=\"1200\" data-end=\"1216\"\u003eRoHS compliant\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K-TECHNICS","offers":[{"title":"Default Title","offer_id":42881677885511,"sku":null,"price":20.0,"currency_code":"KES","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/PC817_1.webp?v=1781608590"},{"product_id":"tip122-darlington-npn-power-transistor-100v-5a-to-220","title":"TIP122 Darlington NPN Power Transistor (100V, 5A) – TO-220","description":"\u003cp data-section-id=\"lhys22\" data-start=\"1368\" data-end=\"1399\"\u003eThe \u003cstrong data-start=\"181\" data-end=\"191\"\u003eTIP122\u003c\/strong\u003e is a high-gain \u003cstrong data-start=\"207\" data-end=\"242\"\u003eNPN Darlington power transistor\u003c\/strong\u003e designed for efficient switching and amplification in medium to high-power electronic circuits.\u003c\/p\u003e\n\u003ch3 data-section-id=\"lhys22\" data-start=\"1368\" data-end=\"1399\"\u003e📌 Technical Specifications\u003c\/h3\u003e\n\u003cul data-start=\"1400\" data-end=\"1633\"\u003e\n\u003cli data-section-id=\"o78kd9\" data-start=\"1400\" data-end=\"1435\"\u003eTransistor Type: NPN Darlington\u003c\/li\u003e\n\u003cli data-section-id=\"1s6a5ry\" data-start=\"1436\" data-end=\"1477\"\u003eCollector-Emitter Voltage (Vce): 100V\u003c\/li\u003e\n\u003cli data-section-id=\"vjvmgw\" data-start=\"1478\" data-end=\"1532\"\u003eCollector Current (Ic): 5A (continuous), 8A (peak)\u003c\/li\u003e\n\u003cli data-section-id=\"1wvd0dl\" data-start=\"1533\" data-end=\"1565\"\u003eBase-Emitter Voltage: 5V max\u003c\/li\u003e\n\u003cli data-section-id=\"t4jkvq\" data-start=\"1566\" data-end=\"1590\"\u003ePackage Type: TO-220\u003c\/li\u003e\n\u003cli data-section-id=\"16mptah\" data-start=\"1591\" data-end=\"1633\"\u003eOperating Temperature: -65°C to +150°C\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K-TECHNICS","offers":[{"title":"Default Title","offer_id":42881687650375,"sku":null,"price":50.0,"currency_code":"KES","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/tip122_2.webp?v=1781609290"},{"product_id":"tip120-npn-darlington-power-transistor-5a-60v-to-220","title":"TIP120 NPN Darlington Power Transistor (5A, 60V, TO-220)","description":"\u003cp\u003e\u003cstrong data-start=\"220\" data-end=\"258\"\u003eTIP120 Darlington Power Transistor\u003c\/strong\u003e, a high-gain NPN switching device designed for reliable control of medium to high-current loads.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1qpglzh\" data-start=\"961\" data-end=\"992\"\u003e⚙️ Technical Specifications\u003c\/h3\u003e\n\u003cul data-start=\"993\" data-end=\"1246\"\u003e\n\u003cli data-section-id=\"pz4ag2\" data-start=\"993\" data-end=\"1034\"\u003eType: NPN Darlington Power Transistor\u003c\/li\u003e\n\u003cli data-section-id=\"hnasjq\" data-start=\"1035\" data-end=\"1076\"\u003eCollector-Emitter Voltage (VCEO): 60V\u003c\/li\u003e\n\u003cli data-section-id=\"1mbvg93\" data-start=\"1077\" data-end=\"1107\"\u003eCollector Current (IC): 5A\u003c\/li\u003e\n\u003cli data-section-id=\"1vqdg80\" data-start=\"1108\" data-end=\"1163\"\u003ePower Dissipation: up to 65W (with proper heatsink)\u003c\/li\u003e\n\u003cli data-section-id=\"ti36t6\" data-start=\"1164\" data-end=\"1197\"\u003ePackage: TO-220 (3-pin + tab)\u003c\/li\u003e\n\u003cli data-section-id=\"tw12w8\" data-start=\"1198\" data-end=\"1246\"\u003ePinout: 1 – Base, 2 – Collector, 3 – Emitter\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K-TECHNICS","offers":[{"title":"Default Title","offer_id":42881688502343,"sku":null,"price":50.0,"currency_code":"KES","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/Tip120_1.jpg?v=1781610256"}],"url":"https:\/\/www.ktechnics.com\/collections\/transistors.oembed","provider":"K-TECHNICS","version":"1.0","type":"link"}