51974 Datasheet, PDF (1/6 Pages) Micropac Industries – True Hermetically Sealed Proportionally Controlled Heater Hybrids

True Hermetically Sealed
Proportionally Controlled Heater Hybrids
Mii
HYBRID MICROELECTRONICS
PRODUCTS DIVISION
Features:
• Self-contained
• Programmable via a single external resistor
• Available from 40 to 50 watts
Applications:
• Microwave Oscillators
• Telecommunications
• Other areas where temperature control is needed
DESCRIPTION
A self-contained hybrid circuit heater that is programmable via a single external resistor. These systems are ideal for
microwave oscillators, telecommunications and other areas where temperature control is needed. Heaters are available
from 40 to 50 watts.
Typical Electrical Characteristics for DC Heater (28V DC Input, 28 Watts (51974))
Operating Voltage Range (See Note 13) …………………………………………………………………………………… 28 ±1 VC
Voltage Limits ……………………………………………………………………………………………… 24 VDC Min, 32 VDC Max
Reverse Voltage Protection …………………………………………………………………………………………….………. To 50 V
Operating Current Range ……………………………………………………………………………….…………....…. .015 to 1.00 A
Turn on Current …………………………………………………………………………………………………..…………… To 1.00 A
Quiescent Current ………………………………………………………………………………………..…………… Less than .019 A
Typical Electrical Characteristics for AC Heaters (115 VAC Input, 28 Watts (52034))
Operating Voltage Range …………………………………………………………………….………. 100 to 125 VAC, 50 to 400 Hz
Voltage Limits ……………………………………………………………………………………………………...……… 0 to 150 VAC
Operating Current, Steady State ……………………………………………………………………………………..… .001 to .280 A
Turn-on Current Range (at 115 VAC) ………………………………………………………………………………………. To .280 A
Quiescent Current ……………………………………………………………………………………………………… Less than 1 mA
Temperature Characteristics
Control Range (See Note 1, 2 & 3) …………………………………………………………………………………. +50°C to +100°C
Variation with Load (See Note 4) ………………………………………………………………………………………...….. 10°C Max
Variation over Operating Range (See Note 5) …………………………………………………………………………………… ±2°C
Maximum Control Temperature (See Note 6) ………………………………………………………………………………… +120°C
Environmental Characteristics
Operating Temperature …………………………………………………………………………………………….… -55°C to +100°C
Altitude ………………………………………………………………………………………………………………...….. 70,000 ft. Max
Shock ……………………………………………………………………………………………………………………….…. 20 G Max
Vibration …………………………………………………………………………………………………………. 50 G at 2,000 Hz Max
Humidity ……………………………………………………………………………………………………………..... Greater than 95%
Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION • 905 E. Walnut St., Garland, TX 75040 • [phone] • Fax [phone]
www.micropac.com E-MAIL: [e-mail] 12/13/01
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