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Part: DCR257
Category:
Discrete
-> Diodes & Rectifiers
-> Current Limiter/Regulator Diodes
Description: Current Limiter Diode, Package : DO-7
Company: Microsemi Corporation
Datasheet: Download DCR257 datasheet File size : 727 kB
Request For quote: Find where to buy DCR257
Datasheet text preview:
· CURRENT REGULATOR DIODES · CONSTANT CURRENT OVER WIDE VOLTAGE RANGE · HIGH SOURCE IMPEDANCE · METALLURGICALLY BONDED · DOUBLE PLUG CONSTRUCTION
DCR250 thru DCR257
MAXIMUM RATINGS
Operating Temperature: -65°C to +175°C Storage Temperature: -65°C to +175°C DC Power Dissipation: 500 mW @ +50°C @ TL = 3/8" Power Derating: 4 mW / °C above +50°C
ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise specified
TYPE NUMBER
REGULATOR CURRENT l p (mA) @ VS = 25V (Note 1) NOM MIN 4.59 5.04 5.58 6.12 6.75 7.38 8.19 9.00 MAX 5.61 6.16 6.82 7.48 8.25 9.02 10.01 11.10 5.10 5.60 6.20 6.80 7.50 8.20 9.10 10.00
MINIMUM DYNAMIC IMPEDANCE @VS = 25V ZS (K ) (Note 2) 100 90 80 70 50 30 20 10
MINIMUM KNEE IMPEDANCE @VK = 6.0 V ZK(K ) (Note 3) 4.0 4.0 3.0 2.0 1.5 1.5 1.0 1.0
MAXIMUM LIMITING VOLTAGE @ lL = 0.8 l p (min) VL (VOLTS) 3.67 4.03 4.46 4.90 5.40 5.90 6.55 7.20
PEAK OPERATING VOLTAGE VOLTS 80 80 70 70 60 60 50 50
DCR250 DCR251 DCR252 DCR253 DCR254 DCR255 DCR256 DCR257
FIGURE 1
DESIGN DATA
CASE: Hermetically sealed glass case. DO-7 outline. LEAD MATERIAL: Copper clad steel.
NOTE 1 NOTE 2 NOTE 3
Pulse measurement @ 1% duty cycle, 10 milliseconds maximum. ZS is derived by superimposing A 90Hz RMS signal equal to 10% of VS on VS ZK is derived by superimposing A 90Hz RMS signal equal to 10% of VK on VK
LEAD FINISH: Tin / Lead THERMAL RESISTANCE: (ROJEC): 250 °C/W maximum at L = .375 inch THERMAL IMPEDANCE: (ZOJX): 25 °C/W maximum POLARITY: Diode to be operated with the banded (cathode) end negative. MOUNTING POSITION: Any
6 LAKE STREET, LAWRENCE, MASSACHUSETTS 01841 PHONE (978) 620-2600 FAX (978) 689-0803 WEBSITE: http://www.microsemi.com
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