1N973B

1N957B - 1N984B VZ : 6.8 to 91V PD: 500mW FEATURES : • Silicon planar power zener diodes. • Standard Zener voltage tolerance is ± 5% • Other tolerances are available upon request. • Pb / RoHS Free ZENER DIODES DO - 35 Glass (DO-204AH) 0.079(2.0 )max. 1.00 (25.4) min. Cathode Mark 0.150 (3.8) max. MECHANICAL DATA : Case: DO-35 Glass Case Weight: approx. 0.13g 0.020 (0.52)max. 1.00 (25.4) min. Dimensions in inches and ( millimeters ) Rating at 25 °C ambient temperature unless otherwise specified. Maximum Ratings and Thermal Characteristics Parameter Zener Current see Table "Characteristics" Maximum Forward Voltage at IF = 200 mA. Power Dissipation at TL = 25°C Thermal Resistance Junction to Ambient Air Junction temperature Storage temperature range VF PD RθJA TJ TS 1.5 500 300 (1) (1) Symbol Value Unit V mW °C/W °C °C 175 -65 to + 150 Notes: (1) Valid provided that leads at a distance of 3/8” from case are kept at ambient temperature. Page 1 of 2 Rev. 02 : March 25, 2005 ELECTRICAL CHARACTERISTICS Rating at 25 °C ambient temperature unless otherwise specified Type Number 1N957B 1N958B 1N959B 1N960B 1N961B 1N962B 1N963B 1N964B 1N965B 1N966B 1N967B 1N968B 1N969B 1N970B 1N971B 1N972B 1N973B 1N974B 1N975B 1N976B 1N977B 1N978B 1N979B 1N980B 1N981B 1N982B 1N983B 1N984B Notes: Zener Voltage VZ @ IZT Nominal IZT (V) (mA) 6.8 18.5 7.5 16.5 8.2 15.0 9.1 14.0 10 12.5 11 11.5 12 10.5 13 9.5 15 8.5 16 7.8 18 7.0 20 6.2 22 5.6 24 5.2 27 4.6 30 4.2 33 3.8 36 3.4 39 3.2 43 3.0 47 2.7 51 2.5 56 2.2 62 2.0 68 1.8 75 1.7 82 1.5 91 1.4 Maximum Zener Impedance (1) ZZT @ IZT ZZk @ IZK (Ω ) (Ω ) 4.5 700 5.5 700 6.5 700 7.5 700 8.5 700 9.5 700 11.5 700 13 700 16 700 17 700 21 750 25 750 29 750 33 750 41 750 49 1000 58 1000 70 1000 80 1000 93 1500 105 1500 125 1500 150 2000 185 2000 230 2000 270 2000 330 3000 440 3000 IZK (mA) 1.00 0.50 0.50 0.50 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 Maximum Reverse Leakage Current IR at VR (V) (µA) 150 5.2 75 5.7 50 6.2 25 6.9 10 7.6 5 8.4 5 9.1 5 9.9 5 11.4 5 12.2 5 13.7 5 15.2 5 16.7 5 18.2 5 20.6 5 22.8 5 25.1 5 27.4 5 29.7 5 32.7 5 35.8 5 38.8 5 42.6 5 47.1 5 51.7 5 56 5 62.2 5 69.2 Maximum DC. Zener Current IZM(2) (mA) 58 53 47 43 40 36 32 29 27 24 21 20 18 16 14 13 12 11 10 9.2 8.5 7.8 6.9 6.3 5.7 5.2 4.7 4.3 (1) The Zener Impedance is derived from the 1 kHz AC voltage which results when an AC current having an RMS value equal to 10% of the Zener current (IZT) is superimposed on IZT. 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 at a distance of 3/8” from case are kept at 25°C ambient temperature. (3) The type number listed have a standard tolerance on the nominal zener voltage of ± 5.0%. Page 2 of 2 Rev. 02 : March 25, 2005