R 0.5W SILICON PLANAR ZENER DIODES S E M I C O N D U C T O R DO-35 FEATURES Silicon planar power zener diodes Standards zener voltage tolerance is +20%.Add suffix "A" for+10% 1.083(27.5) MIN tolerance and suffix "B" for +5% tolerance other tolerance, non standards and higher zener voltage upon request 0.079(2.0) MAX DIA 0.150(3.8) MAX MECHANICAL DATA Case: DO-35 glass case 1.083(27.5) MIN Polarity: Color band denotes cathode end 0.020(0.52) MAX DIA Weight: Approx. 0.13 gram Dimensions in inches and (millimeters) ABSOLUTE MAXIMUM RATINGS(LIMITING VALUES) (TA=25 C) Zener current see table "Characteristics" Ptot TJ TSTG Power dissipation at TA=25 C Junction temperature Storage temperature range 5001) mW 175 C -65 to+175 C 1) Valid provided that a distance of 8mm from case are kept at ambient temperature ELECTRICAL CHARACTERISTICS (T A=25 C) Thermal resistance junction to ambien airt Forward voltage at IF=200mA R JA VF 1) Valid provided that a distance of 8mm from case are kept at ambient temperature 3001) 1.5 C/W Zener Voltage range 3) 1) Test-Voltage VZNOM IZT V mA 1N957 6.8 18.5 1N958 7.5 16.5 1N959 8.2 15 1N960 9.1 14 1N961 10 12.5 1N962 11 11.5 5 ZZT ZZK IZK mA 4.5 1.0 0.5 5.5 IR 2) 2) Suffix B V V mA 150 4.9 5.2 47 0.058 75 5.4 5.7 42 0.062 50 5.9 6.2 38 0.068 10 6.6 6.9 35 7.2 7.6 32 8.0 8.4 28 0.050 0.075 700 A %/ C Suffix A 5 0.076 1N963 12 10.5 11.5 0.077 8.6 9.1 26 1N964 13 9.5 13 0.079 9.4 9.9 24 1N965 15 8.5 16 0.082 10.8 11.4 21 1N966 16 7.8 17 0.083 11.5 12.2 19 1N967 18 7.0 21 0.085 13.0 13.7 17 1N968 20 6.2 25 0.086 14.4 15.2 15 0.087 15.8 16.7 14 1N969 22 5.6 29 750 0.25 1N970 24 5.2 33 0.088 17.3 18.2 14 1N971 27 4.6 41 0.090 19.4 20.6 11 1N972 30 4.2 49 0.091 21.6 22.8 10 1N973 33 3.8 58 0.092 23.8 25.1 9.0 1000 5 1N974 36 3.4 70 0.093 25.9 27.4 8.5 1N975 39 3.2 80 0.094 28.1 29.7 7.8 1N976 43 3.0 93 0.095 31.0 32.7 7.0 1N977 47 2.7 105 0.095 33.8 35.8 6.4 1N978 51 2.5 125 0.096 36.7 38.8 5.9 1500 Notes: (1)The Zener impedance is derived from the 1kHz Ac voltage which results when an AC current having an RMS value equal to 10% of the Zener current (1 ZT) is superimposed on1 ZT Zener impedance is measured at two points to insure a sharp knee on the breakdown curve and to eliminate unstable units. (2)valid provided that leads are kept at ambient temperature at a distance of 8 mm from case. (3)Measured with device junction in thermal equilibrium.