Features
■ Custom versions available, including
SMD solutions and fuse technology
(contact factory)
■ Lead free versions available
(RoHS compliant*)
■ Overvoltage/lightning protection to
Bellcore GR-1089 & ITU-T K.20
■ Standard “off the shelf” designs
■ Typical application is secondary
protection on telecom line cards
4B04B-50X-RC - Surge Line Protection Modules
4B04B-501 (Pair of Matched Resistors)
Product Characteristics
4B04B-502 (Resistor with Thermal Fuse)
Product Characteristics
Resistance Values........................................20 ohms - 100 ohms
Resistance Tolerance ........................................................... 1 ꢀ
TCR............................................................................100 ppm/°C
Ratio Tolerance.......................................>34 ohms........... 0.ꢁ ꢀ
<34 ohms.............. 1 ꢀ
Resistance Values.......................................ꢁ.6 ohms - 100 ohms
Resistance Tolerance....................1 ꢀ (optional)ꢂ ꢁ ꢀ (standard)
TCR ..................................................................800 200 ppm/°C
Power Dissipation @ 2ꢁ ºC.....................................................2 W
Temperature Range..........................................-ꢁꢁ ºC to +12ꢁ ºC
Power Dissipation (per resistor) @ 2ꢁ ºC ................................2 W
Temperature Range ..........................................-ꢁꢁ ºC to +12ꢁ ºC
Functional Characteristics
Lightning Surge Test
Bellcore Spec GR-1089
Environmental Characteristics
10 x 1000 µsec ..................1 kV
2 x 10 µsec .....................2.ꢁ kV
Power Cross Test ............................................Per Bellcore spec.
(Vrms applied vary with resistance values)
TESTS PER MIL-STD-202 ..............................................∆R MAX.
Resistance to Solvents .........................No Marking Deterioration
Resistance to Solder Heat ........................... 0.ꢁ ꢀ or 0.ꢁ ohmsꢂ
whichever is greater
Solderability .......................................................>9ꢁ ꢀ Coverage
Insulation Resistance ................10 megohms min. (isolated pins)
Bias Humidity Test .......................................ꢁ0 V/8ꢁ ꢀ RH/8ꢁ °C
Physical Characteristics
Body Style..........................................................Open Frame SIP
Body Material .........................................................96 ꢀ Alumina
Lead Frame Material .................................Copperꢂ solder coated
Standard Parts Available Off the Shelf
Functional Characteristics
Lightning Surge Test
.....................................................ꢁ.6 ohmsꢂ 10 ohmsꢂ 34 ohms
Bellcore Spec GR-1089
10 x 1000 µsec .................1 kV
2 x 10 µsec ....................2.ꢁ kV
10 x 700 µsec ...................2 kV
25.40±.50
(1.000±.020)
3.05 Max.
(.120 Max.)
ITU-T K.20
Power Cross Test.............................................Per Bellcore spec.
(Vrms applied vary with resistance values)
11.30
(0.445)
MAX.
Physical Characteristics
Body Style ..........................................................Open Frame SIP
Body Material..........................................................96 ꢀ Alumina
Lead Frame Material..................................Copperꢂ solder coated
Standard Parts Available Off the Shelf..........ꢁ0 ohmsꢂ 100 ohms
1
2
3
4
3.43 0.38
(0.135 0.015)
0.36 Max.
(.014 Max.)
2.54±.127
17.78±.254
2.54±.127
(.100±.005)
(0.700±.010)
(.100±.005)
50.80
(2.000)
1.40 Max.
(.055 Max.)
TYP.
12.70
(0.500)
MAX.
2.29 Max.
(.090 Max.)
Functional Schematic
Governing dimensions are in mm.
Dimensions in parenthesis are inches
and are approximate.
15.24
(0.600)
15.24
(0.600)
15.24
(0.600)
15.24
(0.600)
TYP.
0.36 Max.
(.014 Max.)
19
1
7
13
User must short pins 3 & 4 on the circuit board
How To Order
4B 04 B - 50X - XXX LF
How To Order
Model
(4B = Open Frame)
4B 04 B - 50X - XXX J LF
Model
Number of Pins
(4B = Open Frame)
Physical Configuration
Number of Pins
Electrical Configuration
• ꢁ01 = Pair of Matched Resistors
Physical Configuration
Electrical Configuration
Resistance Code
• ꢁ02 = Resistor with Thermal Fuse
• First 2 digits are significant
• Third digit represents the
number of zeros to follow
Resistance Code
• First 2 digits are significant
• Third digit represents the
number of zeros to follow
Lead Free Option
Blank = Standard Product
LF = Lead Free / RoHS Compliant Product
ꢁꢀ Tolerance
Lead Free Option
Blank = Standard Product
LF = Lead Free / RoHS Compliant Product
*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.
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