DB3/DC34/DB4/DB6 SILICON BIDIRECTIONAL DIAC FEATURES The three layer,two terminal, axial lead, hermetically sealed diacs are designed specifically for triggering thyristors. They demonstrate low breakover current at breakover voltage as they withstand peak pulse current,The breakover symmetry is within three volts(DB3,DC34,DB4)or four volts(DB6).These diacs are intended for use in thyrisitors phase control, circuits for lamp dimming,universal motor speed control, and heat control. JF's DB3/DC34/DB4/DB6 are bi-directional trigged diode designed to operate in conjunction with Triacs and SCR's ABSOLUTE RATINGS(LIMITING VALUES) Value Symbols Parameters Units DB3 DC34 Power Dissipation on Printed Pc TA=50 DB4 DB6 150 mW Circuit(L=10mm) ITRM TSTG/TJ Repetitive Peak in-state tp=10u s Current F=100Hz 2.0 2.0 2.0 1.6 A -40 to +125/-40 to 110 Storage and Operating Junction Temperature ELECTRCAL CHARACTERISTICS Value Symbols VBO Parameters Breakover Voltage(Note 2) |+VBO|- Breakover Voltage Symmetry |-VBO| | V| Units DB3 DC34 DB4 DB6 c=22nF(Note 2) Min 28 30 35 56 See diagram1 Typ 32 34 40 60 Max 36 38 45 70 c=22nF(Note 2) V Max 3 4 V Min 5 10 V See diagram1 Dynamic Breakover Voltage(Note 1) Vo Output Voltage(Note 1) IBO Breakover Current(Note 1) tr Rise Time(Note 1) IB Test Conditions Leakage Current(Note 1) I=(IBO to IF=10mA) See diagram1 Min 5 V c=22nF(Note 2) Max 100 A See Diagram 3 Typ 1.5 S Max 10 A See diagram2 VB=0.5 VBO max see diagram 1 Notes: 1. Electrical characteristics applicable in both forward and reverse directions. 2. Connected in parallel with the devices. www.shunyegroup.com DB3/DC34/DB4/DB6 SILICON BIDIRECTIONAL DIAC RATINGS AND CHARACTERISTIC CURVES DB3/DC34/DB4/DB6 DIAGRAM 1: Current-voltage charateristics DIAGRAM 2: Test circuit for output voltage DIAGRAM 3: Test circuit see diagram2 adjust R for Ip=0.5A FIG.1-Power disspation versus ambient temperature(maximum values) FIG.2-Relative variation of VBO versus juntion temperature(typical values) FIG.3-Peak pulse current versus pulse duration (maximum values) www.shunyegroup.com