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| NEW PRODUCT NEW PRODUCT NEW PRODUCT 1N957 THRU 1N978 ZENER DIODES FEATURES DO-35 Silicon Planar Power Zener Diodes Standard Zener voltage tolerance is 5% for "B" suffix. Other tolerances are available upon request. max. .079 (2.0) max. .150 (3.8) min. 1.083 (27.5) Cathode Mark min. 1.083 (27.5) max. .020 (0.52) MECHANICAL DATA Case: DO-35 Glass Case Weight: approx. 0.13 g Dimensions are in inches and (millimeters) MAXIMUM RATINGS Ratings at 25C ambient temperature unless otherwise specified. SYMBOL VALUE UNIT Zener Current (see Table "Characteristics") Power Dissipation at TL = 75C Junction Temperature Storage Temperature Range NOTES: Ptot Tj TS 500(1) 175 - 65 to +175 mW C C (1) TL is measured 3/8" from body. SYMBOL MIN. TYP. MAX. UNIT Thermal Resistance Junction to Ambient Air Forward Voltage at IF = 200 mA NOTES: RthJA - - 300(1) C/W VF - - 1.5 Volts (1) Valid provided that leads at a distance of 3/8" from case are kept at ambient temperature. 1/6/98 1N957 THRU 1N978 ELECTRICAL CHARACTERISTICS Ratings at 25C ambient temperature unless otherwise specified. Type Number Nominal Zener Voltage VZ(3) (Volts) Test Current IZT (mA) Maximum Zener Impedance(1) ZZT @ IZT () ZZK @ IZK () IZK (mA) Maximum Regulator Current IZM(2) (mA) Maximum Reverse Current IR Maximum (A) Test Voltage Vdc (Volts) 1N957B 1N958B 1N959B 1N960B 1N961B 1N962B 1N963B 1N964B 1N965B 1N966B 1N967B 1N968B 1N969B 1N970B 1N971B 1N972B 1N973B 1N974B 1N975B 1N976B 1N977B 1N978B 6.8 7.5 8.2 9.1 10 11 12 13 15 16 18 20 22 24 27 30 33 36 39 43 47 51 18.5 16.5 15 14 12.5 11.5 10.5 9.5 8.5 7.8 7 6.2 5.6 5.2 4.6 4.2 3.8 3.4 3.2 3 2.7 2.5 4.5 5.5 6.5 7.5 8.5 9.5 11.5 13 16 17 21 25 29 33 41 49 58 70 80 93 105 125 700 700 700 700 700 700 700 700 700 700 750 750 750 750 750 1000 1000 1000 1000 1500 1500 1500 1 0.5 0.5 0.5 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 47 42 38 35 32 28 26 24 21 19 17 15 14 13 11 10 9.2 8.5 7.8 7 6.4 5.9 150 75 50 25 10 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5.2 5.7 6.2 6.9 7.6 8.4 9.1 9.9 11.4 12.2 13.7 15.2 16.7 18.2 20.6 22.8 25.1 27.4 29.7 32.7 35.8 38.8 NOTES: (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 ambient temperature. (3) Measured with device junction in thermal equilibrium. |
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