2N2646 Spec Sheets Details Diodes, Transistors, Thyristors, Triacs, Dio... 1 of 2 http://www.americanmicrosemi.com/information/spec/?ss_pn=2N2646 HOME | CATALOG | CART |EXPRESS CHECKOUT | PARTS WATCH | NEW ITEMS |RFQ| Home 2N2646 Availability Online Store Diodes Buy 2N2646 at our online store! Transistors Integrated Circuits Special Offers: FREE UPS Ground Shipping on Orders above $150.00 Lanuage Translator: 2N2646 Information Optoelectronics Did you Know... Thyristors Category Thyristors Products Not only is AMS a leading Class Unijunction Transistors electronics distributor, we Search for Parts Type PN (N-Type Base) Request a Quote Test Houses parts to your exacting 2N2646 Specifications Information Spec Sheets Military/High-Rel : N Testimonials Store Policies Contact Us are being launched all the time. Give us a call to find Absolute Max. Power Diss. (W) : 300m FAQs Company specifications? New AMS semiconductor product lines Tuto

scillator (Figure 9). This oscillator is activated when the battery voltage is low. A C RECTIFIED A.C. VOLTAGE FROM CHARGER SCR G + A R1 E C1 Z1 B2 UJT R2 V B1 12 V T1 R3 - R1 3.9K, 1/2 W R2 1K, POT. R3 5.1K, 1/2 W C1 .25 f Z1 1N753, 6.2 V SCR MCR3813 UJT 2N2646 T1 PR1, 30T, no. 22 SEC, 45T, NO. 22 CORE: FERROX CUBE 203F181303 Figure 8. 12 Volt Battery Charger Control VB B2 1 BATTERY CHARGING BATTERY CHARGED TIME VC 1 ZENER VOLTAGE R1 UJT UJT PEAK POINT VOLTAGE B2 B1 R2 Z1 C1 TIME VR GC SCR CONDUCTS SCR NONCONDUCTING TIME Figure 9. UJT Relaxation Oscillator Operation http://onsemi.com 378 T1 RGC + VBATT. Figure 10 shows a permanent magnet alternator regulator designed to regulate a 15 ampere output. The two SCRs are connected on the ac side of the bridge, and short out the alternator when triggered by the unijunction voltage sensitive triggering circuit. The sensing circuit is of the type shown in Figure 7. The shorted output does not appreciably increase the maximum output current level. A singl

2N2646 2N2905A 2N2905A 2N2907 2N2907(Metal) 2N3055 2N3055 2N3440 2N3773 2N3773 2N3903 2N3904 2N3906 2N3906 2N4091 2N4401 2N4401 U, I, P, f, h21,min 60 20 75 5,00 0,03 0,50 80,00 0,08 0,80 9,00 70,00 60 75 0,80 0,80 0,40 0,40 250,00 300,00 40 40 0,20 0,20 0,36 0,36 60 0,60 40 60 80 0,60 0,60 15,00 250 160 160 60 60 40 40 60 60 50 TO61 TO22 TO39 NPN NPN NPN Si 50 50 TO18 TO92 NPN NPN 500,00 500,00 40 40 TO18 TO18 NPN Si NPN Si 0,60 200,00 100 TO139 PNP Si 0,40 0,40 115,00 200,00 200,00 2,00 100 100 20 TO18 TO18 TO3 PNP Si PNP NPN 1,00 16,00 16,00 0,20 0,20 0,20 0,20 1,00 150,00 150,00 0,63 0,36 0,35 0,35 70,00 4,00 4,00 250,00 250,00 200,00 200,00 40 15 15 50 100 100 100 TO39 TO3 TO3 TO92 TO92 TO92 TO92 NPN Si NPN NPN NPN NPN PNP PNP 0,60 0,60 0,35 0,35 200,00 200,00 150 150 TO92 TO92 NPN NPN 1400 1400 1500 1300 2020 1100 230 1030 820 1000 1970 1500 1460 190 1200 2900 1390 2580 3000 2070 480 530 170 510 3300 340 520 2N4401 2N4403 2N4870 2N4990 2N5401 2N5460 2N5551 2N5551 2N5590 2N5641 2N5642 2N5643

4.690 7.300 7.040 1.900 2.100 2N2644 AS! GTC NJS Q52 SCA SE! 2.500 4.110 1.700 1.640 1.700 1.600 1.880 3.430 1.200 1.160 1.200 1.100 2N2645 ASI GTC NJS Q52 SE! SES 2.700 1.760 1.750 1.690 2.650 1.020 0.340 AT 2.030 1.470 1.450 1.400 1.600 0.680 F 0.255 BC 2N2646 AS! 0.700 MOT 0.550 NJS 2.000 Q52 1.930 SEI 0.600 0.530 0.480 1.500 1.450 0.550 2N2647 AS! NJS Q52 SEI 0.950 2.250 2.170 0.850 0.720 1.600 1.540 0.700 2.400 6.210 2.350 2.270 2.840 2.400 1.800 5.180 1.750 1.690 2.000 1.700 9.950 9.600 9.850 7.000 6.760 6.900 2.400 AS 5.620 GTC MOT 4.800 3.430 NJS 7.500 7.240 Q52 2.340 SCA 2.100 SEI 1.800 4.690 4.800c 7.000 6.760 1.650 1.550 2N2641 2.200 ASI 4.110 GTC MOT 2.200 1.580 AL NJS 7.500 7.240 Q52 . 1.350 SCA 1.650 SEI 1.650 3.430 2.200c 7.000 6.760 0.950 1.350 3.000 ASI 6.130 GTC MOT 3.000 2.150 7.600 NJS 7.330 Q52 3.120 SCA SE! 3.100 2.250 5.110 3.000c AL 7.200 6.950 2.200 2.100 NJS Q52 SE! 4.500 4.340 4.400 3.000 2.900 2.900 3.000 2.900 4.900 2.400 2.320 3.600 2N265 NJS Q52 SE! 2N2651 ASI GTC N

This oscillator is activated when the battery voltage is low. A C RECTIFIED A.C. VOLTAGE FROM CHARGER SCR G + A R1 E B2 R2 V B1 12 V UJT C1 Z1 T1 R3 - R1 -- 3.9K, 1/2 W R2 -- 1K, POT. R3 -- 5.1K, 1/2 W C1 -- .25 f Z1 -- 1N753, 6.2 V SCR -- MCR3813 UJT -- 2N2646 T1 -- PR1, 30T, no. 22 SEC, 45T, NO. 22 CORE: FERROX CUBE 203F181-303 Figure 8. 12 Volt Battery Charger Control VB B 1 2 BATTERY CHARGING BATTERY CHARGED TIME VC 1 ZENER VOLTAGE R1 UJT UJT PEAK POINT VOLTAGE B2 B1 R2 Z1 C1 TIME VR GC SCR CONDUCTS SCR NONCONDUCTING T1 RGC + VBATT. TIME Figure 9. UJT Relaxation Oscillator Operation Motorola TVS/Zener Device Data Technical Information 11-57 CHAPTER 8 When the peak point voltage (switching voltage) of the unijunction transistor exceeds the breakdown voltage of the Zener diode, Z1, connected across the delay circuit capacitor, C1, the unijunction transistor ceases to oscillate. If the relaxation oscillator does not operate, the controlled rectifier will not receive trigger pulses and will not

at a known temperature, ad)ust RCAL to set output voltage to Vout = TEMP x 10 mV, Output of MTS1 02, 3, 5 IS then converted 10 Vout = 10 mV/O - ("F, `C, or `K) `gov ~ 470n l.Ok NOTE With 01 any@iQ2 %* identical temperature RC~$$\@~.j,~out = O 000 V adjust 2N2646 B2 ~ `"'~ensor output to a d!gltal format which may be ~::?~ used for direct connection to an MPU B1 ~;, ..... Reference Popular W.J E/ectrontcs, Prudhomme, December 1976, Page 62 IC1 =74?A 620 pF +(= 6 + 7 `: 10 ICIB . ~ output (to MPU) T 10k IF loon 1 = All resistors are 10Oh 1/4 watt except 6.2 k wh!ch is 5%61 /4 watt Motorola reserves the rlghf to make changes to anv products herein 10 Improve rel,ablllt~ funct!on or design Motorola does no! assume anv I,ab!l,tv ar, s,ng OU1of !he application or use of anv product or C!rcult descrthd herein neither does It convev any license under Its Datenl r!ghts nor lhe rlghrs of others Semiconductor Products Inc. @ Pt8nl.d !n Sw,tzorland , I

temperature R5 = 10 k Potentiometer R6 = 5 M Potentiometer R7 = 100 k, 1/2 W R8 = 1 k, 1/2 W Figure AN1003.13 R7 D6 Q1 D1 R8 0.1 F 100 V Q2 Triac Q1 Note: L1 and C1 form an RFI filter that may be eliminated * dv/dt snubber network when required C1 T1 Q1 = 2N2646 Q2 = Q2010L5 T1 = Dale PT 10-101 or equivalent D1-4 = 200 V Diode D5 = 20 V Zener D6 = 100 V Diode C1 = 0.1 F, 30 V AC Input Voltage AC Load Current R1 C1, C3 120 V ac 60 Hz 12 A 250 k 0.1 F 200 V 100 H Q2015L9 240 V ac 50/60 Hz 3A 500 k 0.1 F 400 V 200 H Q4004L4 Figure AN1003.14 Precision Proportional Temperature Control Several speed control and light dimming (phase) control circuits have been presented that give details for a complete 120 V application circuit but none for 240 V. Figure AN1003.14 and Figure AN1003.15 show some standard phase control circuits for 240 V, 60 Hz/50 Hz operation along with 120 V values for comparison. Even though there is very little difference, there are a few key things that must be remembered. First, cap

scillator (Figure 9). This oscillator is activated when the battery voltage is low. A C RECTIFIED A.C. VOLTAGE FROM CHARGER SCR G + A R1 E B2 R2 V B1 12 V UJT C1 Z1 T1 R3 - R1 3.9K, 1/2 W R2 1K, POT. R3 5.1K, 1/2 W C1 .25 f Z1 1N753, 6.2 V SCR MCR3813 UJT 2N2646 T1 PR1, 30T, no. 22 SEC, 45T, NO. 22 CORE: FERROX CUBE 203F181-303 Figure 8. 12 Volt Battery Charger Control VB B2 1 BATTERY CHARGING BATTERY CHARGED TIME VC 1 ZENER VOLTAGE R1 UJT UJT PEAK POINT VOLTAGE B2 B1 R2 Z1 C1 T1 RGC TIME VR GC + SCR CONDUCTS SCR NONCONDUCTING TIME Figure 9. UJT Relaxation Oscillator Operation http://onsemi.com 58 VBATT. Figure 10 shows a permanent magnet alternator regulator designed to regulate a 15 ampere output. The two SCRs are connected on the ac side of the bridge, and short out the alternator when triggered by the unijunction voltage sensitive triggering circuit. The sensing circuit is of the type shown in Figure 7. The shorted output does not appreciably increase the maximum output current level. A singl

temperature R5 = 10 k Potentiometer R6 = 5 M Potentiometer R7 = 100 k, 1/2 W R8 = 1 k, 1/2 W Figure AN1003.13 R7 D6 Q1 D1 R8 0.1 F 100 V Q2 Triac Q1 Note: L1 and C1 form an RFI filter that may be eliminated * dv/dt snubber network when required C1 T1 Q1 = 2N2646 Q2 = Q2010L5 T1 = Dale PT 10-101 or equivalent D1-4 = 200 V Diode D5 = 20 V Zener D6 = 100 V Diode C1 = 0.1 F, 30 V AC Input Voltage AC Load Current R1 C1, C3 120 V ac 60 Hz 12 A 250 k 0.1 F 200 V 100 H Q2015L9 240 V ac 50/60 Hz 3A 500 k 0.1 F 400 V 200 H Q4004L4 Figure AN1003.14 Precision Proportional Temperature Control Several speed control and light dimming (phase) control circuits have been presented that give details for a complete 120 V application circuit but none for 240 V. Figure AN1003.14 and Figure AN1003.15 show some standard phase control circuits for 240 V, 60 Hz/50 Hz operation along with 120 V values for comparison. Even though there is very little difference, there are a few key things that must be remembered. First, cap

TO-126 5 2000 >300 2.7 100 >100 2.0 0.4 1.5 >750 1.5 >750 750...5000 1.5 750...5000 0.95 1.5 >750 1.5 >750 750...5000 1.5 200 TO-126 hFE 200 4 TO-220 * Unijunction Transistors Part KT132A KT132 KT133A KT133 Pin to Pin P max, Vb, b2 max, Compatibility W V 2N2646 0.3 35 2N2647 2N4870 0.3 35 2N4871 Ie pulse, A 2.0 1.5 Ie rev, A 12.0 0.2 1.0 Veb sat, V 3.5 2.5 Package 0.56...0.75 0.68...0.82 0.56...0.75 0.70...0.85 Case 22A-01 TO-92 * Logic Level N-Channel MOSFETs Part 723 727 744 745 746 737 750 775 775 775 72 Pin to Pin Vds max, Compatibility V IRLZ44 60 IRLZ34 60 IRL520 100 IRL530 100 IRL540 100 IRL630 200 IRL640 200 2SK2498- 60 55 60 Rds (on) Ohm 0.028 0.05 0.27 0.22 0.077 0.4 0.18 0.009 0.009 0.011 Id max, A 50 30 9.2 15 28 18 18 50 Vgs max, V 10 10 10 10 10 10 10 20 P max, W 150 88 60 88 150 50 50 150 Vgs (th), V 1.0...2.0 1.0...2.0 1.0...2.0 1.0...2.0 1.0...2.0 1.0...2.0 1.0...2.0 1.0...2.0 1.0...2.0 1.0...2.0 Package TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 DISCRETE SEMICONDUC

TO-126 5 2000 >300 2.7 100 >100 2.0 0.4 1.5 >750 1.5 >750 750...5000 1.5 750...5000 0.95 1.5 >750 1.5 >750 750...5000 1.5 200 TO-126 hFE 200 4 TO-220 * Unijunction Transistors Part KT132A KT132 KT133A KT133 Pin to Pin P max, Vb, b2 max, Compatibility W V 2N2646 0.3 35 2N2647 2N4870 0.3 35 2N4871 Ie pulse, A 2.0 1.5 Ie rev, A 12.0 0.2 1.0 Veb sat, V 3.5 2.5 Package 0.56...0.75 0.68...0.82 0.56...0.75 0.70...0.85 Case 22A-01 TO-92 * Logic Level N-Channel MOSFETs Part 723 727 744 745 746 737 750 775 775 775 72 Pin to Pin Vds max, Compatibility V IRLZ44 60 IRLZ34 60 IRL520 100 IRL530 100 IRL540 100 IRL630 200 IRL640 200 2SK2498- 60 55 60 Rds (on) Ohm 0.028 0.05 0.27 0.22 0.077 0.4 0.18 0.009 0.009 0.011 Id max, A 50 30 9.2 15 28 18 18 50 Vgs max, V 10 10 10 10 10 10 10 20 P max, W 150 88 60 88 150 50 50 150 Vgs (th), V 1.0...2.0 1.0...2.0 1.0...2.0 1.0...2.0 1.0...2.0 1.0...2.0 1.0...2.0 1.0...2.0 1.0...2.0 1.0...2.0 Package TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 DISCRETE SEMICONDUC

2N2646 2N2647 SILICON UNIJONCTION TRANSISTORS Silicon Planar Unijunction Transistors have a structure resulting in lower saturation voltage, peak-point current and valley current as well as a much higher base-one peak pulse voltage. In addition, these devices are much faster switches. The 2N2646 is intended for general purpose industrial applications where circuit economy is of primary importance, and is ideal for use in firing circuits for Silicon Controlled Rectifiers and other applications where a guaranteed minimum pulse amplitude is required. The 2N2647 is intended for applications where a low emitter leakage current and a low peak point emitter current (trigger current) are required and also for triggering high power SCR's. CASE MAXIMUM RATINGS (*) TJ=125C unless otherwise noted Symbol Ratings 2N2646 2N2647 VB1E Base 1 - Emitter Voltage 30 V VB2E Base 2 - Emitter Voltage 30 V IFRMS RMS Emitter Current 50 mA IEM Emitter Peak Current 2 A PTOT Total Power Dissipation

74 N/A 1N821A CMKTC825A 1N823A CMKTC825A 1N823A DO-7 CMKTC825A 1N825A CMKTC825A 1N825A DO-7 CMKTC825A 1N827A CMKTC825A 1N827A DO-7 CMKTC825A 1N829A CMKTC825A 1N829A DO-7 CMKTC825A 1N87A N/A 1N888 N/A 1N914B 1N4448 2N2411 CM4209 2N2412 CM4209 2N2609 2N5116 2N2646 2N4870 2N2840 N/A 2N2894 CM4209 2N3012 CM4209 2N3055H N/A 2N3249 CM4209 2N3546 CM4209 2N3724A 2N3725A 2N3829 CM4209 2N4208 CM4209 2N4209 CM4209 2N5057 CM4209 2N5114 2N5116 2N5484 2N5485 H 2N5545 N/A 2N5771 PN4209 2N5950 2N5951 2N869 CM4209 2N869A CM4209 *** CONTINUED *** PDN01000 8/03/15 Varies Varies http://www.centralsemi.com PDN01000 8/03/15 Varies Varies *** CONTINUED FROM PRIOR PAGE *** Central Part Number _________________________ _________________________ Replacement Central would be happy to assist you by providing additional information or technical data to help locate an alternate source if we have no replacement available. Please email your requests to engineering@centralsemi.com.

74 N/A 1N821A CMKTC825A 1N823A CMKTC825A 1N823A DO-7 CMKTC825A 1N825A CMKTC825A 1N825A DO-7 CMKTC825A 1N827A CMKTC825A 1N827A DO-7 CMKTC825A 1N829A CMKTC825A 1N829A DO-7 CMKTC825A 1N87A N/A 1N888 N/A 1N914B 1N4448 2N2411 CM4209 2N2412 CM4209 2N2609 2N5116 2N2646 2N4870 2N2840 N/A 2N2894 CM4209 2N3012 CM4209 2N3055H N/A 2N3249 CM4209 2N3546 CM4209 2N3724A 2N3725A 2N3829 CM4209 2N4208 CM4209 2N4209 CM4209 2N5057 CM4209 2N5114 2N5116 2N5484 2N5485 H 2N5545 N/A 2N5771 PN4209 2N5950 2N5951 2N869 CM4209 2N869A CM4209 *** CONTINUED *** PDN01000 8/03/15 Varies Varies http://www.centralsemi.com PDN01000 8/03/15 Varies Varies *** CONTINUED FROM PRIOR PAGE *** Central Part Number _________________________ _________________________ Replacement Central would be happy to assist you by providing additional information or technical data to help locate an alternate source if we have no replacement available. Please email your requests to engineering@centralsemi.com. Mouser Electronics Authorized Distributor Click

74 N/A 1N821A CMKTC825A 1N823A CMKTC825A 1N823A DO-7 CMKTC825A 1N825A CMKTC825A 1N825A DO-7 CMKTC825A 1N827A CMKTC825A 1N827A DO-7 CMKTC825A 1N829A CMKTC825A 1N829A DO-7 CMKTC825A 1N87A N/A 1N888 N/A 1N914B 1N4448 2N2411 CM4209 2N2412 CM4209 2N2609 2N5116 2N2646 2N4870 2N2840 N/A 2N2894 CM4209 2N3012 CM4209 2N3055H N/A 2N3249 CM4209 2N3546 CM4209 2N3724A 2N3725A 2N3829 CM4209 2N4208 CM4209 2N4209 CM4209 2N5057 CM4209 2N5114 2N5116 2N5484 2N5485 H 2N5545 N/A 2N5771 PN4209 2N5950 2N5951 2N869 CM4209 2N869A CM4209 *** CONTINUED *** PDN01000 8/03/15 Varies Varies http://www.centralsemi.com PDN01000 8/03/15 Varies Varies *** CONTINUED FROM PRIOR PAGE *** Central Part Number _________________________ _________________________ Replacement Central would be happy to assist you by providing additional information or technical data to help locate an alternate source if we have no replacement available. Please email your requests to engineering@centralsemi.com. Mouser Electronics Authorized Distributor Click