Fast Diode Features: High surge current capability Void-free plastic in a DO-41 package 1A operation at T = 55C with no thermal runaway A Fast switching for high efficiency Exceeds environmental standards of MIL-S-19500/228 Specifications: Mechanical Data: Case : Moulded plastic, DO-41 Terminals : Axial leads, solderable per MIL-STD-202, Method 208 Polarity : Colour band denotes cathode Mounting position : Any Weight : 0.012 oz, 0.3g Maximum Ratings and Electrical Characteristics: Ratings at 25C ambient temperature unless otherwise specified. Single phase, half wave, 60Hz, resistive or inductive load. For capacitive load, derate current by 20%. Parameters BA157 BA159 Units Maximum Recurrent Peak Reverse Voltage 400 1,000 Maximum RMS Voltage 280 700 V Maximum DC Blocking Voltage 400 1,000 Maximum Average Forward Rectified 1 Current 0.375 (9.5mm) Lead Length at T = 55C A A Peak Forward Surge Current 8.3ms Single Half Sine-Wave 30 Superimposed on Rated Load (JEDEC Method) Maximum Forward Voltage at 1A 1.3 V Maximum reverse current T = 25C 5 J A 500 at rated DC blocking voltage T = 100C J www.element14.com www.farnell.com www.newark.com Page <1> 27/03/13 V1.0Fast Diode Parameters BA157 BA159 Units Typical Junction Capacitance (Note 1) 12 pF Maximum reverse recovery time (Note 2) 150 250 C/W Operating and Storage Temperature Range -50 to +150 C Notes: 1. Measured at 1MHz and applied reverse voltage of 4V. 2. Reverse recovery test conditions: I = 0.5A, I = 1A, I = 0.25A. F R RR Ratings and Characteristic Curves Notes: 1. Rise Time = 7nS maximum Input Impedance = 1M, 22pF 2. Rise Time = 10nS maximum Source Impedance = 50 Figure 1 - Reverse Recovery Time Characteristics and Test Circuit Diagram www.element14.com www.farnell.com www.newark.com Page <2> 27/03/13 V1.0