{"id":4275,"date":"2026-06-25T04:01:20","date_gmt":"2026-06-25T04:01:20","guid":{"rendered":"https:\/\/blogs.lcsc.com\/blog\/?p=4275"},"modified":"2026-06-25T04:01:20","modified_gmt":"2026-06-25T04:01:20","slug":"tcrt5000-infrared-sensor-specs-wiring-and-uses","status":"publish","type":"post","link":"https:\/\/blogs.lcsc.com\/blog\/tcrt5000-infrared-sensor-specs-wiring-and-uses\/","title":{"rendered":"TCRT5000 Infrared Sensor: Specs, Wiring, and Uses"},"content":{"rendered":"<p class=\"code-line\" dir=\"auto\" data-line=\"4\">The <a href=\"https:\/\/www.lcsc.com\/category\/1268.html?scene=FULL_MATCH&amp;globalKeyword=TCRT5000&amp;s_z=n_q_TCRT5000\">TCRT5000 <\/a>infrared sensor detects nearby objects using reflected IR light. It pairs an IR emitter with a phototransistor in one compact package. Engineers rely on it for proximity sensing and line detection. This guide covers TCRT5000 infrared sensor specs, wiring, and applications.<\/p>\n<h2 class=\"code-line\" dir=\"auto\" data-line=\"6\"><strong>Key Takeaways<\/strong><\/h2>\n<ul class=\"code-line\" dir=\"auto\" data-line=\"7\">\n<li class=\"code-line\" dir=\"auto\" data-line=\"7\">The TCRT5000 infrared sensor detects objects through reflected infrared light.<\/li>\n<li class=\"code-line\" dir=\"auto\" data-line=\"8\">Detection range is short, between 2mm and 15mm, for close-range use.<\/li>\n<li class=\"code-line\" dir=\"auto\" data-line=\"9\">Wiring the TCRT5000 infrared sensor requires only four pins and two resistors.<\/li>\n<li class=\"code-line\" dir=\"auto\" data-line=\"10\">Ambient light can affect accuracy, so shielding and comparators help.<\/li>\n<li class=\"code-line\" dir=\"auto\" data-line=\"11\">Low cost and a compact footprint make it popular in robotics.<\/li>\n<\/ul>\n<h2 id=\"what-is-the-tcrt5000-infrared-sensor\" class=\"code-line\" dir=\"auto\" data-line=\"13\">What Is the TCRT5000 Infrared Sensor?<\/h2>\n<p class=\"code-line\" dir=\"auto\" data-line=\"15\">The TCRT5000 is a reflective optical sensor. It combines an infrared LED and a phototransistor in one package. The LED emits infrared light toward nearby surfaces. The phototransistor then detects any light that bounces back. As a result, the sensor can tell when an object is close.<\/p>\n<h3 id=\"how-the-tcrt5000-infrared-sensor-works\" class=\"code-line\" dir=\"auto\" data-line=\"17\">How the TCRT5000 Infrared Sensor Works<\/h3>\n<p class=\"code-line\" dir=\"auto\" data-line=\"19\">The TCRT5000 infrared sensor works on reflection, not transmission. First, the IR LED emits light. Next, that light hits a nearby surface. If the surface reflects light, the phototransistor detects it. Consequently, the output current changes to signal detection.<\/p>\n<h2 id=\"key-features-of-the-tcrt5000-infrared-sensor\" class=\"code-line\" dir=\"auto\" data-line=\"21\">Key Features<\/h2>\n<p class=\"code-line\" dir=\"auto\" data-line=\"23\">The TCRT5000 offers several practical advantages for embedded designs.<\/p>\n<ul class=\"code-line\" dir=\"auto\" data-line=\"25\">\n<li class=\"code-line\" dir=\"auto\" data-line=\"25\"><strong>Compact package.<\/strong>\u00a0The sensor fits into small PCBs easily.<\/li>\n<li class=\"code-line\" dir=\"auto\" data-line=\"26\"><strong>Low cost.<\/strong>\u00a0It suits high-volume production runs.<\/li>\n<li class=\"code-line\" dir=\"auto\" data-line=\"27\"><strong>Fast response.<\/strong>\u00a0It detects fast-moving objects reliably.<\/li>\n<li class=\"code-line\" dir=\"auto\" data-line=\"28\"><strong>Simple interface.<\/strong>\u00a0It needs only basic analog or digital wiring.<\/li>\n<\/ul>\n<h3 id=\"tcrt5000-infrared-sensor-detection-range-and-limitations\" class=\"code-line\" dir=\"auto\" data-line=\"30\">TCRT5000 Infrared Sensor Detection Range and Limitations<\/h3>\n<p class=\"code-line\" dir=\"auto\" data-line=\"32\">The TCRT5000 works best at short range. Typical detection range runs from 2mm to 15mm. Therefore, it isn&#8217;t suitable for long-distance sensing. Also, ambient light can affect its readings.<\/p>\n<h2 id=\"tcrt5000-infrared-sensor-technical-specifications\" class=\"code-line\" dir=\"auto\" data-line=\"34\">Technical Specifications<\/h2>\n<table class=\"code-line\" dir=\"auto\" data-line=\"36\">\n<thead class=\"code-line\" dir=\"auto\" data-line=\"36\">\n<tr class=\"code-line\" dir=\"auto\" data-line=\"36\">\n<th><strong>Parameter<\/strong><\/th>\n<th><strong>Symbol<\/strong><\/th>\n<th><strong>Range<\/strong><\/th>\n<th><strong>Unit<\/strong><\/th>\n<th><strong>Notes<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"code-line\" dir=\"auto\" data-line=\"38\">\n<tr class=\"code-line\" dir=\"auto\" data-line=\"38\">\n<td>Forward voltage (LED)<\/td>\n<td>V_F<\/td>\n<td>1.1\u20131.5<\/td>\n<td>V<\/td>\n<td>Typical at 20mA<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"39\">\n<td>Peak wavelength<\/td>\n<td>\u03bb_p<\/td>\n<td>~950<\/td>\n<td>nm<\/td>\n<td>Infrared spectrum<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"40\">\n<td>Collector current<\/td>\n<td>I_C<\/td>\n<td>1\u201330<\/td>\n<td>mA<\/td>\n<td>Phototransistor output<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"41\">\n<td>Operating temperature<\/td>\n<td>T_op<\/td>\n<td>-25 to 85<\/td>\n<td>\u00b0C<\/td>\n<td>Standard range<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"42\">\n<td>Detection distance<\/td>\n<td>D<\/td>\n<td>2\u201315<\/td>\n<td>mm<\/td>\n<td>Optimal range<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"code-line\" dir=\"auto\" data-line=\"44\">These specs guide circuit design decisions directly. For example, designers size the LED resistor using V_F. In addition, they set pull-up resistors based on I_C. Always confirm exact values against the manufacturer&#8217;s datasheet before finalizing a design.<\/p>\n<h3 id=\"wiring-the-tcrt5000-infrared-sensor\" class=\"code-line\" dir=\"auto\" data-line=\"46\">Wiring the TCRT5000 Infrared Sensor<\/h3>\n<p class=\"code-line\" dir=\"auto\" data-line=\"48\">Wiring the TCRT5000 requires four pins. First, connect the LED anode to power through a resistor. Second, connect the LED cathode to ground. Third, connect the phototransistor collector to a pull-up resistor. Finally, connect the emitter to ground.<\/p>\n<div>When integrating the TCRT5000 into a detection circuit, following proper <a href=\"https:\/\/blogs.lcsc.com\/blog\/electrical-circuit-design-the-engineers-guide-to-components-specs-layout\/\">electrical circuit design<\/a> practices helps improve signal stability and sensing accuracy.<\/div>\n<h2 id=\"common-tcrt5000-infrared-sensor-application-scenarios\" class=\"code-line\" dir=\"auto\" data-line=\"50\">Application Scenarios<\/h2>\n<p class=\"code-line\" dir=\"auto\" data-line=\"52\">The TCRT5000 fits many practical use cases.<\/p>\n<ul class=\"code-line\" dir=\"auto\" data-line=\"54\">\n<li class=\"code-line\" dir=\"auto\" data-line=\"54\"><strong>Line-following robots.<\/strong>\u00a0The sensor detects dark and light surfaces. Robots use this contrast for path tracking.<\/li>\n<li class=\"code-line\" dir=\"auto\" data-line=\"55\"><strong>Object counting.<\/strong>\u00a0The sensor detects items on a conveyor. Each interruption triggers a count.<\/li>\n<li class=\"code-line\" dir=\"auto\" data-line=\"56\"><strong>Tachometers.<\/strong>\u00a0The sensor detects a rotating slotted wheel. This setup measures motor speed accurately.<\/li>\n<li class=\"code-line\" dir=\"auto\" data-line=\"57\"><strong>Proximity switches.<\/strong>\u00a0The sensor triggers when objects get close. This works well in vending machines.<\/li>\n<\/ul>\n<h3 id=\"avoiding-ambient-light-interference\" class=\"code-line\" dir=\"auto\" data-line=\"59\">Avoiding Ambient Light Interference<\/h3>\n<p class=\"code-line\" dir=\"auto\" data-line=\"61\">Ambient light can cause false readings in the TCRT5000 infrared sensor. Therefore, shield the sensor from direct sunlight. Also, use comparator circuits with adjustable thresholds. This approach improves reliability outdoors.<\/p>\n<h2 id=\"tcrt5000-infrared-sensor-manufacturing-and-procurement-notes\" class=\"code-line\" dir=\"auto\" data-line=\"63\">Manufacturing and Procurement Notes<\/h2>\n<p class=\"code-line\" dir=\"auto\" data-line=\"65\">The TCRT5000 infrared sensor comes from established IC manufacturers, including Vishay and similar suppliers. Lead times vary by order volume. As a result, engineers should plan procurement early. Most distributors stock this part in bulk. Always confirm current specs against the manufacturer&#8217;s published datasheet.<\/p>\n<h2 id=\"tcrt5000-vs-other-ir-sensor-modules\" class=\"code-line\" dir=\"auto\" data-line=\"67\">TCRT5000 vs Other IR Sensor Modules<\/h2>\n<table class=\"code-line\" dir=\"auto\" data-line=\"69\">\n<thead class=\"code-line\" dir=\"auto\" data-line=\"69\">\n<tr class=\"code-line\" dir=\"auto\" data-line=\"69\">\n<th><strong>Feature<\/strong><\/th>\n<th><strong>TCRT5000<\/strong><\/th>\n<th><strong>Sharp GP2Y0A21<\/strong><\/th>\n<th><strong>QRE1113<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"code-line\" dir=\"auto\" data-line=\"71\">\n<tr class=\"code-line\" dir=\"auto\" data-line=\"71\">\n<td>Type<\/td>\n<td>Reflective<\/td>\n<td>Distance-based<\/td>\n<td>Reflective<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"72\">\n<td>Range<\/td>\n<td>2\u201315mm<\/td>\n<td>10\u201380cm<\/td>\n<td>1\u201310mm<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"73\">\n<td>Output<\/td>\n<td>Analog\/digital<\/td>\n<td>Analog<\/td>\n<td>Analog\/digital<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"74\">\n<td>Cost<\/td>\n<td>Low<\/td>\n<td>Moderate<\/td>\n<td>Low<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"code-line\" dir=\"auto\" data-line=\"76\">For short-range detection, the TCRT5000 works well. However, choose the Sharp sensor instead for longer distances.<\/p>\n<div>For custom sensor boards, good <a href=\"https:\/\/blogs.lcsc.com\/blog\/qfn-pcb-layout-guide\/\">PCB layout<\/a> practices can reduce noise and improve the performance of infrared sensing circuits.<\/div>\n<h2 id=\"frequently-asked-questions\" class=\"code-line\" dir=\"auto\" data-line=\"78\">Frequently Asked Questions<\/h2>\n<h3 id=\"how-do-i-calculate-the-led-resistor-value\" class=\"code-line\" dir=\"auto\" data-line=\"80\">How Do I Calculate the LED Resistor Value?<\/h3>\n<p class=\"code-line\" dir=\"auto\" data-line=\"82\">Use Ohm&#8217;s law with supply voltage and V_F. First, subtract V_F from the supply voltage. Then, divide the result by your desired current.<\/p>\n<h3 id=\"does-the-tcrt5000-infrared-sensor-follow-industry-standards\" class=\"code-line\" dir=\"auto\" data-line=\"84\">Does the TCRT5000 Follow Industry Standards?<\/h3>\n<p class=\"code-line\" dir=\"auto\" data-line=\"86\">It follows standard optoelectronic component specs. However, no specific international standard applies to this part.<\/p>\n<h3 id=\"is-the-tcrt5000-infrared-sensor-reliable-in-dusty-environments\" class=\"code-line\" dir=\"auto\" data-line=\"88\">Is the TCRT5000 Reliable in Dusty Environments?<\/h3>\n<p class=\"code-line\" dir=\"auto\" data-line=\"90\">Dust can reduce reflection accuracy over time. Therefore, enclosures help maintain consistent performance.<\/p>\n<h3 id=\"is-the-tcrt5000-cheaper-than-ultrasonic-sensors\" class=\"code-line\" dir=\"auto\" data-line=\"92\">Is the TCRT5000 Cheaper Than Ultrasonic Sensors?<\/h3>\n<p class=\"code-line\" dir=\"auto\" data-line=\"94\">Yes, it costs less than most ultrasonic modules. However, ultrasonic sensors offer a longer detection range.<\/p>\n<h3 id=\"can-i-use-the-tcrt5000-infrared-sensor-outdoors\" class=\"code-line\" dir=\"auto\" data-line=\"96\">Can I Use the TCRT5000 Infrared Sensor Outdoors?<\/h3>\n<p class=\"code-line\" dir=\"auto\" data-line=\"98\">Yes, but shield it from direct sunlight. Otherwise, ambient IR light can cause detection errors.<\/p>\n<h2 id=\"find-what-you-need-on-lcsc\" class=\"code-line\" dir=\"auto\" data-line=\"100\">Find What You Need on <a href=\"https:\/\/www.lcsc.com\/\">LCSC<\/a><\/h2>\n<p class=\"code-line\" dir=\"auto\" data-line=\"102\">Finding the right TCRT5000 infrared sensor is easy on\u00a0LCSC. LCSC stocks a wide range of optical sensors, from reflective modules to distance sensors. You can filter by specification, compare prices, and order in any quantity. Start browsing today.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The TCRT5000 infrared sensor detects nearby objects using reflected IR light. It pairs an IR emitter with a phototransistor in one compact package. Engineers rely on it for proximity sensing and line detection. This guide covers TCRT5000 infrared sensor specs, wiring, and applications. Key Takeaways The TCRT5000 infrared sensor detects objects through reflected infrared light. [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[27],"tags":[392,391],"class_list":["post-4275","post","type-post","status-publish","format-standard","hentry","category-electronic-components","tag-infrared-sensor","tag-tcrt5000"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>TCRT5000 Infrared Sensor - LCSC<\/title>\n<meta name=\"description\" content=\"The TCRT5000 infrared sensor detects objects using reflected IR light. 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