4B08B-503-XXX

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AI SIO PL
LA N IA
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Features
■
■
■
■
RoHS compliant* versions available
Overvoltage/lightning protection to ITU-T K.20
Standard “off-the-shelf” design
Typical application is secondary protection on telecom line cards
4B08B-503-RC - Surge Line Protection Module
Electrical Characteristics
Resistance Values (R1 = R2) .......................................50 & 100 Ω
Resistance Tolerance ...........................................................±2 %
TCR............................................................................100 ppm/°C
Ratio Tolerance.....................................................................±1 %
Power Dissipation (per resistor) @ 25 °C ................................2 W
Temperature Range ..........................................-55 ºC to +125 ºC
Environmental Characteristics
Tests per MIL-STD-202 ..................................................∆ R max.
Resistance to Solvents .........................No marking deterioration
Resistance to Solder Heat ................................................± 0.5 Ω
Solderability.......................................................>95 % Coverage
Insulation Resistance .........................10 MΩ min. (isolated pins)
Bias Humidity Test...................................50 V / 85 % RH / 85 °C
Physical Characteristics
Body Style..........................................................Open Frame SIP
Substrate Material ..................................................96 % Alumina
Lead Frame Material .................................Copper, solder coated
Flammability...............................................Conforms to UL94V-0
Functional Characteristics
Lightning Surge Test ....................................10 x 700 µSec, 1 KV
Power Induction.............................................................300 Vrms
Power Contact...............................................................220 Vrms
Product Dimensions
38.10
MAX.
(1.500)
MAX.
0.62
(.025)
MAX.
11.05
(.435)
1 2
3.43 ± .38
(.135 ± .015)
1.27
(.050)
5 6
10 11
10.16
(.400)
7.62
(.300)
7.62
(.300)
DIMENSIONS:
14 15
.51
(.020)
0.36
(.014)
MAX.
2.54
(.100)
MILLIMETERS
(INCHES)
Electrical Schematic
F1
1
R1
2
5
R2
6
10
F2
11
14
15
How To Order
4B 08 B - 503 - XXX LF
Model
(4B = Open Frame)
Number of Pins
Physical Configuration
Electrical Configuration
503 = Matched pair of resistors plus thermal fuse
Asia-Pacific:
TEL +886- (0)2 25624117
FAX +886- (0)2 25624116
Europe:
TEL +41-41 7685555
FAX +41-41 7685510
Resistance Code
• 500 = 50 Ω
• 101 = 100 Ω
RoHS Compliant Option
Blank = Standard Product
LF = RoHS Compliant Product
The Americas:
TEL +1-951 781-5500
FAX +1-951 781-5700
www.bourns.com
*RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
REV. 06/11
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