1N957B~1N982B Zener diode Features 1. High reliability 2. Very sharp reverse characteristic 3. Zener voltage 6.8V to 75V 4. VZ-tolerance5% Applications Voltage stabilization Absolute Maximum Ratings Tj=25 Parameter Test Conditions Type Symbol Value Unit PV 500 mW Z-current IZ PV/VZ mA Junction temperature Tj 200 Tstg -65~+200 Symbol Value Unit RthJA 300 K/W Tamb75 Power dissipation Storage temperature range Maximum Thermal Resistance Tj=25 Parameter Junction ambient Test Conditions I=9.5mm(3/8") TL=constant Electrical Characteristics Tj=25 Parameter Forward voltage Test Conditions Type IF=200mA Symbol VF Min Typ Max Unit 1.5 V Excel Semiconductor www.excel-semi.com FaxBack +86-512-66607370 Rev. 3d, 1-Jan-2006 1/6 1N957B~1N982B Type 1N957B 1N958B 1N959B 1N960B 1N961B 1N962B 1N963B 1N964B 1N965B 1N966B 1N967B 1N968B 1N969B 1N970B 1N971B 1N972B 1N973B 1N974B 1N975B 1N978B 1N979B 1N982B 1) VZnom1) V 6.8 7.5 8.2 9.1 10 11 12 13 15 16 18 20 22 24 27 30 33 36 39 51 56 75 IZT for VZT and mA V1) 18.5 6.46~7.14 16.5 7.125~7.875 15 7.79~8.61 14 8.645~9.555 12.5 9.5~10.5 11.5 10.45~11.55 10.5 11.4~12.6 9.5 12.35~13.65 8.5 14.25~15.75 7.8 15.2~16.8 7.0 17.1~18.9 6.2 19~21 5.6 20.9~23.1 5.2 22.8~25.2 4.6 25.6~28.35 4.2 28.5~31.5 3.8 31.35~34.65 3.4 34.2~37.8 3.2 37.05~40.95 2.5 48.45~53.55 2.2 53.2~58.8 1.7 71.25~78.75 ZZT 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 80 125 150 270 ZZK at IZK mA 700 1.0 700 0.5 700 0.5 700 0.5 700 0.25 700 0.25 700 0.25 700 0.25 700 0.25 700 0.25 750 0.25 750 0.25 750 0.25 750 0.25 750 0.25 1000 0.25 1000 0.25 1000 0.25 1000 0.25 1500 0.25 2000 0.25 2000 0.25 IR at A 150 75 50 25 10 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 VR V 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 38.8 42.6 56 IZM2) mA 47 42 38 35 32 28 26 24 21 19 17 15 14 13 11 10 9.2 8.5 7.8 5.9 5.4 4.1 Tolerance and voltage designation(Vz): The type numbers shown have a standard tolerance of 5% on the nominal zener voltage, C for 2%, D for 1%. 2) Maximum zener current ratings(IZM): Maximum zener current ratings are based on maximum zener voltage of the individual units and JEDEC 250 mW rating. Excel Semiconductor www.excel-semi.com FaxBack +86-512-66607370 Rev. 3d, 1-Jan-2006 2/6 1N957B~1N982B Characteristics (Tj=25 unless otherwise specified) Figure 1. Typical Thermal Resistance Figure 2. Typical Forward Characteristics Figure 3. Temperature coefficients (-55 to +150 temperature range; 90% of the units are in the ranges indicated.) Figure 4. Effect of zener current on zener impedance Figure 5. Effect of zener voltage on zener impedance Excel Semiconductor www.excel-semi.com FaxBack +86-512-66607370 Rev. 3d, 1-Jan-2006 3/6 1N957B~1N982B Figure 6. Zener Voltage versus Zener Current - Vz=1 thru 16 Volts Figure 7. Zener Voltage versus Zener Current - Vz=15 thru 30 Volts Excel Semiconductor www.excel-semi.com FaxBack +86-512-66607370 Rev. 3d, 1-Jan-2006 4/6 1N957B~1N982B Figure 8. Zener Voltage versus Zener Current - Vz=30 thru 75 Volts Excel Semiconductor www.excel-semi.com FaxBack +86-512-66607370 Rev. 3d, 1-Jan-2006 5/6 1N957B~1N982B Dimensions in mm Cathode identification Type No. 0.55 max. 1N 95 Cathode 2.0 max. 26 min. 4.2 max. Anode 26 min. Standard Glass Case JEDEC DO 35 Marking 1N 95 8B Excel Semiconductor www.excel-semi.com FaxBack +86-512-66607370 Rev. 3d, 1-Jan-2006 6/6