2N4851

2N4851 2N4852 2N4853 PN SILICON UNIJUNCTION TRANSISTOR w w w. c e n t r a l s e m i . c o m DESCRIPTION: The CENTRAL SEMICONDUCTOR 2N4851, 2N4852, and 2N4853 are Silicon PN Unijunction Transistors designed for timing, sensing, and trigger circuits. MARKING: FULL PART NUMBER TO-18 (UJT) CASE MAXIMUM RATINGS: (TA=25°C) Emitter Reverse Voltage Interbase Voltage RMS Emitter Current Peak Emitter Current (Duty Cycle ≤1%, PRR≤10pps) RMS Power Dissipation Operating Junction Temperature Storage Temperature SYMBOL VB2E VB2B1 Ie ie PD TJ Tstg 30 35 50 1.5 300 -65 to +125 -65 to +200 UNITS V V mA A mW °C °C ELECTRICAL CHARACTERISTICS: (TA=25°C unless otherwise noted) SYMBOL TEST CONDITIONS MIN VB2B1=10V (2N4851) 0.56 VB2B1=10V (2N4852, 2N4853) RBB IEB2O IEB2O IV IV IV IP IP VOB1 VOB1 VOB1 VB2B1=3.0V VB2E=30V (2N4851, 2N4852) VB2E=30V (2N4853) VB2B1=20V, RB2=100Ω (2N4851) VB2B1=20V, RB2=100Ω (2N4852) VB2B1=20V, RB2=100Ω (2N4853) VB2B1=25V (2N4851, 2N4852) VB2B1=25V (2N4853) V1=20V (2N4851) V1=20V (2N4852) V1=20V (2N4853) 3.0 5.0 6.0 2.0 4.0 6.0 0.70 4.7 MAX 0.75 0.85 9.1 100 50 UNITS kΩ nA nA mA mA mA 2.0 0.4 μA μA V V V R2 (13-December 2010) 2N4851 2N4852 2N4853 PN SILICON UNIJUNCTION TRANSISTOR TO-18 (UJT) CASE - MECHANICAL OUTLINE LEAD CODE: 1) Emitter 2) Base 1 3) Base 2 MARKING: FULL PART NUMBER R2 (13-December 2010) w w w. c e n t r a l s e m i . c o m