25C D MM 8235605 OOO44S? 2 MMESIEG 7-3/-25" N-Channel Junction Field-Effect Transistors BF 245A BF 245 B SIEMENS AKTIENGESELLSCHAF 57 p77 BF 245 C BF 245 A, B, and C are N-channel junction field-effect transistors in plastic package similar to TO 92 (10 A 3 DIN 41868). They are particularly suitable for use in de, AF and RF amplifiers. 2,5max DSG Type Ordering code 0480.48 Td BF 245 Q62702-F236 a Uy am BF 245 A | 062702-F209 f + | * BF 245 B | Q62702-F182 27min Le _ BF 245 C | 062702-F205 52max 48max Approx. weight 0,25 g Dimensions in mm Maximum ratings Drain-source voltage Vos 30 V Drain-gate voltage (Js = 0) +Vog 30 Vv Gate-source voltage ([p = 0) -Ves 30 Vv Drain current Ip 25 mA Gate current Ig 10 mA Junction tamperature Tj 150 C Storage temperature range T stg -65 to +150 c Total power dissipation (Tamp S 75C)') Prot 300 mw Thermal resistance Junction to ambient air Ria | $250 | Kw") 1) If the transistors with max 3 mm lead length are fixed on PCBs with a 10 mm x 10 mm large copper area for the drain terminal, RthyA= 2 KAN, Prot= max. 300 mW then applies up to Tamb = 90C. 1880 A-13 503 aw aphid 0 scm a aN ac me vbr=I asc D MH 42355605 OOO44SS 4 MMSIEG _25C 04458 O SIEMENS AKTIENGESELLSCHAF Static characteristics (Tj = 25C) Gate cutoff current (-Ves = 20 V, Vos = 0) {-Veg = 20 V, Vps = 0, T) = 125C} Gate-source breakdown voltage (-Ig = 1 pA, Vpg = 0) Drain-source short-circuit current (Vos = 15 V, Veg = 0) Gate-source voltage (Vos = 15 V, Jp = 200 pA) Gate-source pinch-off voltage (Vos = 15 V, Ip = 10 nA) Dynamic characteristics (T,mp = 25C) Four-pole characteristics (Vos = 15 V, Veg = 0, f = 1 kHz) (Vpg = 15 V, Veg = 0, = 200 MHz) (Vos = 20 V, Ves = 1 V, f = 1 MHz} Cutoff frequency of short-circuit forward transfer admittance! (Vs = 15 V, Vgg = 0) Noise figure (Vpg = 15 V, Vas = 0, Rg =1kQ, f= 100 MHz, Tamp = 25C) BF 245 A: BF 245 B: BF 245 C: BF 245 A: BF 245 B: BF 245 c: less -less -Vieriess loss loss loss Ves Vas Vas -Vp 21s 22s git V2tsl 9225 re BF 245A BF 245B BF 245C s5 <500 230 2,0 to 6.5 6 to 15 12 to 25 0.4 to 2.2 1.6 to 3.8 3.2 to 7.5 0.5 to 8.0 1.5 nA mA?) dB 1) Frequency for a decrease in the small-signal short-circuit forward transfer admittance to 70% of the value at 1 kHz. 2) BF 245 A1: Ips = 2.0 to 3.0 mA, ~VGS = 0.4 to 1.0V BF 245 A2: Ins = 3.0 to 4.5 mA, -VGs = 0.7 ta 1.4V BF 246 A3: Ips s = 4.6 to 6.5 mA, -VGS = 1.1 to 2.2V 504 1881 A-L4 swee5C D MM 4235605 OOO4459 & MESIEG pm TH - 2S 7 29 UF4Dy BF 245A BF 245 B SIEMEN S AKTIENGESELLSCHAF BE 245C Total perm. power dissipation veraus temperature mw Ptot = f (Tart) 400 For 300 200 100 0 0 50 100 150 C Transfer characteristic Jp = f (Ves) Output characteristics [py = f (Vos) Vos = 15 V: 7; = 25C Tj = 25C, Veg = parameter mA BF 245A mA + Ves 18 82 B= 0 l Sa 1 Peep oman ate 1 nee Pe,25C D MM 6235605 OOO44EO 2 MmMSTESG - 9 Ta eb STEMENS AKTIENGESELLSCHAF Transfer characteristic /p = f (-Vgg) Vos = 15 V; Tj = 25C mA BF 245B 10 Ip ? | 8 > ~Ves Transfer characteristic /p = f (-Veg) Vos = 18 V, Tj = 26C mA BF 245 20 8 16 th 12 10 - Ves 506 ee 1883 B-02 BV EF UTttEY ty th BF 245A BF 245B BF 245C Output characteristics Ip = f (Vpg) Veg = parameter; Tj = 25C mA 10 9 8 Output charaoteristics fy = f (Vpg) Ves = parameter; Tj = 25C mA 20 18 16 14 12 10 0 5 0 SVve ~ 25C D) MM 8235605 QOO44bL 4 BMSIEG 25C 04461 O SIEMENS AKTIENGESELLSCHAF Drain current versus temperature Ip = f(T); Vag = parameter? Vog = 15 V mA BF 245A 4 Drain current versus temperature Ip = f(T); Ves = parameter, Vos = 15 V mA BF 245C 20 Ny [ 10 0 50 100 150 C (1884 B-03 TF! -28 BF 245A BF 245 8B BF 245 C Drain current versus temperature Ip = f(T); Veg = parameter, Vog = 18 V mA 2 Ip | 5 10 5 0 0 50; 400 150C ra Corretation between V, and [pss Vpg = 15 V, Ip = 10 mA; Tj = 25C Vp 0 10 20 30mA Toss 507 lee- 25C D M 8235605 OOO44b2 & MESIEG -. 7 3/-FS _3G vite. | D - SIEMENS AKTIENGESELLSCHAF Input characteristics Cig = f (Vgg) pF Vos = 20 V; f = 1 MHz; Tam = 25C 6 Cus oP Vas Reverse current versus temperature NA Igss = f(T); -Vesg = 20 Vi Vos = 0 10! Tess 40 10 10 10? 0 50 +00 150C " i 508 ~ alee aE 1885 B-04 BF 245A BF 245B BF 245 C Reverse transfer capacitance Crag = f (Veg) Vog = 20 V; BF f= 1MHz:Tamp = 25C 15 Crs 05 0 . 5 10V Ves Dynamic drain-source resistance tps = F(-Ves): Vos = 0; kQ f=1kHz; Tamp = 25C 19 fos 10! BF245AR BF 2456/ BF 245C 0 10! 0 1 2 3 AV *-Ves sels8@5C D MM 8235605 0004463 & MESIEG . TARAS SIEMENS AKTIENGESELLSCHAF Small-signat short-circuit forward transfer admittance yois = f (Ip) mS Vos = 15 V; f = 1KHz; Tamy = 25C 15 asl BF 2h BF 2458 BF 245A 50 2,5 0 10 20mA "1886 B=-05 2 _25C 04463 [ Noise figure NF =f (f) Vg = 15 V; Vag = 0; dB Ay =1kQ, Tamp = 25C 3 ie 10! BF 245A BF 245 B BF 245 C 10? 10 MHz ~f 509 1 easily ten arate ben to oy Maeharaeh Kenna mltimie RE 2G danced remedies Boe 8