{"product_id":"elektor-zener-diode-tester","title":"Elektor Zener Diode Tester","description":"\u003cp\u003eThe Elektor Zener Diode Tester is essentially a constant-current source that can be switched in steps from 1 to 50 mA. It can be used to test Z-diodes up to a maximum of 54 V. Thanks to a 60-V step-up converter, the device can be powered by the usual 5 to 12 V.\u003c\/p\u003e\n\u003cp\u003eThe principle of this tester is straightforward. A Z-diode or other DUT (device under test, such as an LED) is biased by an adjustable current source. The voltage across the DUT can be measured with a multimeter. The voltage of most (small) Z-diodes is specified at a current of 5 mA. Depending on the application, the voltage at other currents can also be of interest. That is why six current settings are available: 1, 2, 5, 10, 20, and 50 mA. LEDs are often specified at a current of 20 mA.\u003c\/p\u003e\n\u003cp\u003eWhat can be tested is:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWhether a Z-diode is defective (short circuit or high impedance).\u003c\/li\u003e\n\u003cli\u003eWhether a Z-diode exhibits the correct Z-voltage.\u003c\/li\u003e\n\u003cli\u003eHow a Z-voltage changes with different currents.\u003c\/li\u003e\n\u003cli\u003eWhat exact voltage is present at an integrated voltage reference.\u003c\/li\u003e\n\u003cli\u003eWhether LEDs in a series chain differ in brightness (hence the 20 mA current).\u003c\/li\u003e\n\u003cli\u003eWhat the current gain is for different base currents in (power) transistors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe kit contains all parts listed in the bill of materials including PCB and enclosure.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply voltage\u003c\/td\u003e\n\u003ctd\u003e5…12 V\/2 A (USB-C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply current (Itest = 50 mA)\u003c\/td\u003e\n\u003ctd\u003e1.1 A @ 5 V \/ 412 mA @ 12 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelectable currents\u003c\/td\u003e\n\u003ctd\u003e1, 2, 5, 10, 20, and 50 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. test voltage\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;54 V @ Itest ≥1 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. output voltage\u003c\/td\u003e\n\u003ctd\u003e60 V @ Itest = 0 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage limit at 5 V\u003c\/td\u003e\n\u003ctd\u003e4.5 V @ Itest = 1 mA \/ 5.18 V @ Itest = 50 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure dimensions\u003c\/td\u003e\n\u003ctd\u003e110 x 82 x 44 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePCB size\u003c\/td\u003e\n\u003ctd\u003e105.4 x 67.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"3\"\u003eConnections\u003c\/td\u003e\n\u003ctd\u003e4 mm banana sockets for multimeter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2 mm banana sockets for test clips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB-C socket for power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eIncluded\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eResistors\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eR1 = 3.3 kΩ, 600 mW, 1%\u003c\/li\u003e\n\u003cli\u003eR2 = 0.15 Ω, 1 W, 5%, LS 12.7 mm, ø 3.5 mm\u003c\/li\u003e\n\u003cli\u003eR3, R8 = 180 Ω, 600 mW, 1%\u003c\/li\u003e\n\u003cli\u003eR4, R6, R16 = 1 kΩ, 600 mW, 1%\u003c\/li\u003e\n\u003cli\u003eR5, R19 = 47 kΩ, 600 mW, 1%\u003c\/li\u003e\n\u003cli\u003eR7 = 3.9 kΩ, 1 W, 5%, LS 12.7 mm, ø 3.5 mm\u003c\/li\u003e\n\u003cli\u003eR9, R10, R12 = 10 kΩ, 600 mW, 1%\u003c\/li\u003e\n\u003cli\u003eR11, R13 = 100 Ω, 600 mW 1%\u003c\/li\u003e\n\u003cli\u003eR14 = 249 Ω, 600 mW, 1%\u003c\/li\u003e\n\u003cli\u003eR15 = 499 Ω, 600 mW, 1%\u003c\/li\u003e\n\u003cli\u003eR17 = 2.49 kΩ, 250 mW, 1%\u003c\/li\u003e\n\u003cli\u003eR18 = 4.99 kΩ, 250 mW, 1%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eCapacitors\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eC1 = 470 uF \/ 35 V, 20%, Ir = 1.86 A, ø 12.5 mm, LS 5 mm, ESR = 0.038 Ω (Panasonic EEUTP1V471)\u003c\/li\u003e\n\u003cli\u003eC2 = 1 uF \/ 100 V, 10%, X7R, LS 5 mm\u003c\/li\u003e\n\u003cli\u003eC3 = 2.2 nF \/ 50 V, 10%, X7R, LS 5 mm\u003c\/li\u003e\n\u003cli\u003eC4, C7 = 100 nF \/ 100 V, 10%, X7R, LS 5 mm\u003c\/li\u003e\n\u003cli\u003eC5 = 100 uF \/ 100 V, 20%, ø 14 mm max., LS 5 mm\u003c\/li\u003e\n\u003cli\u003eC6 = 1 nF \/ 100 V, 10%, X7R, LS 5 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eInductor\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eL1 = 100 uH, Irms = 2.4 A, Isat = 3.5 A, 0.09 Ω, radial, pitch 2.5\/5\/10 mm, ø 14 mm max. (Kemet SBC8-101-242)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eSemiconductors\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eD1 = MUR120G, DO-41\u003c\/li\u003e\n\u003cli\u003eD2, D4 = STPS3150RL, DO-201AD\u003c\/li\u003e\n\u003cli\u003eD3 = Z-diode, 18 V, 1.3 W (BZX85C18)\u003c\/li\u003e\n\u003cli\u003eD5 = Z-diode, 5.1 V, 0.5 W (1N5231B)\u003c\/li\u003e\n\u003cli\u003eLED1 = LED in pushbutton S1\u003c\/li\u003e\n\u003cli\u003eLED2 = LED, green, 3 mm\u003c\/li\u003e\n\u003cli\u003eIC1 = MC34063, DIP-8\u003c\/li\u003e\n\u003cli\u003eIC2 = LM4040BIZ-5.0\/NOPB, TO-92 (TO-226AA-3)\u003c\/li\u003e\n\u003cli\u003eIC3 = TL051CP, DIP-8\u003c\/li\u003e\n\u003cli\u003eT1 = BC327.25, TO-92\u003c\/li\u003e\n\u003cli\u003eT2 = STP40NF10L, TO-220\u003c\/li\u003e\n\u003cli\u003eT3 = IRF9510PBF, TO-220\u003c\/li\u003e\n\u003cli\u003eT4 = 2N7000, TO-92\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eOthers\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eK1, K2, S1, S3 = 2-way screw terminal block, LS 3.5 mm, max. 1.5 mm²\u003c\/li\u003e\n\u003cli\u003econnected to K1 = USB-C socket, 30 V\/3 A, chassis mounted, wired, 9 x 16 mm\u003c\/li\u003e\n\u003cli\u003econnected to K2 = Banana Connector, 2 mm, Socket, 60 VDC, Panel Mount, red (Multicomp 24.102.1)\u003c\/li\u003e\n\u003cli\u003econnected to K2 = Banana Connector, 2 mm, Socket, 60 VDC, Panel Mount, black (Multicomp 24.102.2)\u003c\/li\u003e\n\u003cli\u003eTest clip, red, 30 VAC\/60 VDC (Hirschmann 931467101)\u003c\/li\u003e\n\u003cli\u003eTest clip, black, 30 VAC\/60 VDC (Hirschmann 931467100)\u003c\/li\u003e\n\u003cli\u003eS1 = Pushbutton, panel mount, SPST-NO, 30 DC\/100 mA, with red LED\u003c\/li\u003e\n\u003cli\u003eS2 = Rotary Switch, 6 position, 2 pole, 30°, 250 V\/150 mA\u003c\/li\u003e\n\u003cli\u003eS3 = Toggle switch, panel mount, SPDT, solder lugs, 28 VDC\u003c\/li\u003e\n\u003cli\u003eT2, T3 = Heat sink, 15°C\/W, FK 214 SA-CB\u003c\/li\u003e\n\u003cli\u003eEnclosure Hammond 1591XXSSBK, ABS, 110 x 82 x 44 mm\u003c\/li\u003e\n\u003cli\u003eKnob for S2, round shaft 6 mm, ø 21 mm, with indicator line (Multicomp CP-LB21-6-6D)\u003c\/li\u003e\n\u003cli\u003e4 x Self-tapping screw #4-1\/4\", carbon steel, pan head\u003c\/li\u003e\n\u003cli\u003eBanana plug, red, 2 mm, 60 VDC (Multicomp 25.205.1)\u003c\/li\u003e\n\u003cli\u003eBanana plug, black, 2 mm, 60 VDC (Multicomp 25.205.2)\u003c\/li\u003e\n\u003cli\u003eBanana socket, black 4 mm, panel mount\u003c\/li\u003e\n\u003cli\u003eBanana socket, red 4 mm, panel mount\u003c\/li\u003e\n\u003cli\u003efor LED1, LED2 = Pin header, 1 x 2, vertical, pitch 2.54 mm\u003c\/li\u003e\n\u003cli\u003efor LED1, LED2 = Pin socket, 1 x 2, vertical, pitch 2.54 mm\u003c\/li\u003e\n\u003cli\u003efor T2, T3 = M3 screw, 10 mm, steel, pan head\u003c\/li\u003e\n\u003cli\u003e2 x M3 washer, plain, steel\u003c\/li\u003e\n\u003cli\u003e4 x M3 nut\u003c\/li\u003e\n\u003cli\u003efor IC1, IC3 = DIP-8 socket\u003c\/li\u003e\n\u003cli\u003eWire, black, 0.25 mm² (24 AWG), stranded 14 x 0.15 mm, 1 m\u003c\/li\u003e\n\u003cli\u003eWire, red, 0.25 mm² (24 AWG), stranded 14 x 0.15 mm, 1 m\u003c\/li\u003e\n\u003cli\u003ePCB 250772-1 v1.1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eLinks\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.elektormagazine.com\/labs\/zener-diode-tester-250772\" target=\"_blank\"\u003eElektor Labs\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Elektor","offers":[{"title":"Default Title","offer_id":56950785737036,"sku":"21289","price":84.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/6280\/3788\/files\/Elektor-Zener-Diode-Tester.jpg?v=1782391611","url":"https:\/\/www.elektor.com\/products\/elektor-zener-diode-tester","provider":"Elektor","version":"1.0","type":"link"}