4a12p 506 500

*R
oH
V SC
AV ER OM
AI SIO PL
LA N IA
BL S NT
E
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
4A12P-506-500 - Surge Line Protection Module
Matched Pair of Resistors plus Thermal Fuse
Product Dimensions
Electrical Characteristics
32.81
MAX.
(1.292)
Resistance Values (R1 = R2)........................................................50 Ω
Resistance Tolerance..................................................................±1 %
TCR ..................................................................................100 ppm/°C
Ratio Tolerance ........................................................................±0.5 %
Power Dissipation (per resistor) @ 25 % .......................................2 W
Temperature Range...................................................-40 ºC to +85 ºC
12.70 14.59
(.500) (.575)
1 2
Physical Characteristics
Body Style .............................................Dual in line SMD - twin pack
Substrate Material ........................................................96 % Alumina
Lead Frame Material .......................................Copper, solder coated
Flammability .....................................................Conforms to UL94V-0
Processability................Unit is only suitable for no-clean processing
Convection Reflow...................Unit will withstand 260 °, 20 seconds
Packaging ..................16 “ diameter reels, 44mm tape, 250 pcs./reel
4
8
10 11
3.72
(.146)
2.54 ± .13
(.100 ± .005)
10.16 ± .13
(.400 ± .005)
5.08 ± .13
(.200 ± .005)
5.28 ± .013
(0.208 ± .005)
Functional Characteristics
Lightning Surge Test...........................................10 x 700 µSec, 1 KV
Power Induction ...................................................................300 Vrms
Power Contact .....................................................................220 Vrms
13.40 ± .25
(.527 ± .010)
2.54 ± .25
(.100 ± .010)
How To Order
4A 12 P - 506 - 500 LF
Model
(4A = Surface Mount)
7.11 ± .25
(0.280 ± .010)
Number of Pins
DIMENSIONS:
Physical Configuration
Electrical Configuration
506 = Matched Pair of Resistors plus Thermal Fuse
Resistance Code
• 500 = 50 Ω
RoHS Compliant Option
Blank = Standard Product
LF = RoHS Compliant Product
Electrical Schematic
1
22
2
21
R1
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.
R4
4
19
8
15
R2
Asia-Pacific: TEL +886- (0)2 25624117 • FAX +886- (0)2 25624116
Europe: TEL +41-41 7685555 • FAX +41-41 7685510
Americas: TEL +1-951 781-5500 • FAX +1-951 781-5700
MILLIMETERS
(INCHES)
R3
10
13
11
12
REV. 06/11
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