CB Series — Ceramic Housed - General Purpose
Features
• Fireproof power wirewound
• High thermal conductivity
• Different element (resistor) available:
precision/ ceramic &metal oxide
• Non-inductive styles available
• Body standoffs available, add "F" after CB
• High temperature silicone coating
• RoHS compliant/ lead-free
Electrical Specifications
Type
Power Rating
(Watts)
@ 70°C
2W
3W
5W
7W
10W
15W
20W
22W
25W
30W
2W
3W
5W
7W
10W
15W
3W
5W
Ohmic Range and Tolerance
0.5%
–
–
–
–
–
–
–
–
–
–
1Ω – 5K
1Ω – 10K
1Ω – 10K
1Ω – 15K
1Ω – 20K
1Ω – 20K
–
–
1%
–
–
–
–
–
–
–
–
–
–
1Ω – 5K
1Ω – 10K
1Ω – 10K
1Ω – 15K
1Ω – 20K
1Ω – 20K
–
–
5%
0.2Ω – 125Ω
0.1Ω – 350Ω
0.1Ω – 500Ω
0.15Ω – 750Ω
0.2Ω – 1K
0.2Ω – 1K
0.3Ω – 1.25K
0.3Ω – 1.25K
0.3Ω – 1.25K
0.3Ω – 1.25K
1Ω – 5K
1Ω – 10K
1Ω – 10K
1Ω – 15K
1Ω – 20K
1Ω – 20K
100Ω – 10K
100Ω – 10K
10%
0.2Ω – 125Ω
0.1Ω – 350Ω
0.1Ω – 500Ω
0.15Ω – 750Ω
0.2Ω – 1K
0.2Ω – 1K
0.3Ω – 1.25K
0.3Ω – 1.25K
0.3Ω – 1.25K
0.3Ω – 1.25K
–
–
–
–
–
–
–
–
CB 2
CB 3
CB 5
CB 7
CB 10
CB 15
CB 20
CB 22
CB 25
CB 30
WCB 2
WCB 3
WCB 5
WCB 7
WCB 10
WCB 15
MCB 3
MCB 5
Resistance Temperature Coefficient Standard:
CB series:
±800ppm below 1Ω
&
±300ppm for 1Ω and above;
WCB series:
±50ppm from 1Ω to 10Ω
&
±20ppm above 10Ω;
MCB series:
±200ppm
How to Order
CB
SEI Type
2
Code
100
Nominal Resistance
5%
Tolerance
B
Packaging
Type
CB
WCB
MCB
2
5
10
20
25
Code
3
7
15
22
30
Tolerance
0.5%
1%
5%
10%
Code
B
B
B
B
Description
CB 2, CB 3, CB 5, WCB 2
WCB 3, WCB 5, MCB 3, MCB 5
CB 7, CB 10, CB 15, WCB 7, WCB 10, WCB 15
CB 20, CB 22, CB 25, CB 30
Pkg Qty
750
750
250
100
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
59
email: marketing@seielect.com
CB Series — Ceramic Housed - General Purpose
Body Standoff
Note:
CB - General Purpose Wirewound
WCB - Precision/Ceramic Wirewound
MCB - Metal Oxide Element
Mechanical Specifications
Type
Tolerance
CB 2
CB 3
CB 5
CB 7
CB 10
CB 15
CB 20
CB 22
CB 25
CB 30
WCB 2
WCB 3
WCB 5
WCB 7
WCB 10
WCB 15
MCB 3
MCB 5
A
±0.031
±0.8
0.700
17.8
0.875
22.2
0.875
22.2
1.400
35.6
1.875
47.6
1.875
47.6
2.500
63.5
2.500
63.5
2.500
63.5
2.500
63.5
0.700
17.8
0.875
22.2
0.875
22.2
1.400
35.6
1.875
47.6
1.875
47.6
0.875
22.2
0.875
22.2
B
±0.031
±0.8
0.245
6.2
0.312
7.9
0.375
9.5
0.375
9.5
0.375
9.5
0.500
12.7
0.500
12.7
0.500
12.7
0.500
12.7
0.625
15.9
0.245
6.2
0.312
7.9
0.375
9.5
0.375
9.5
0.375
9.5
0.500
12.7
0.312
7.9
0.375
9.5
C
±0.031
±0.8
0.255
6.5
0.312
7.9
0.375
9.5
0.375
9.5
0.375
9.5
0.500
12.7
0.500
12.7
0.500
12.7
0.500
12.7
0.625
15.9
0.255
6.5
0.312
7.9
0.375
9.5
0.375
9.5
0.375
9.5
0.500
12.7
0.312
7.9
0.375
9.5
D
±0.002
±0.05
0.032
0.81
0.036
0.91
0.036
0.91
0.036
0.91
0.036
0.91
0.036
0.91
0.036
0.91
0.036
0.91
0.036
0.91
0.036
0.91
0.032
0.81
0.032
0.81
0.032
0.81
0.036
0.91
0.036
0.91
0.036
0.91
0.032
0.81
0.032
0.81
E
±0.031
±0.8
0.300
7.6
0.375
9.5
0.437
11.1
0.500
12.7
0.500
12.7
0.625
15.9
0.625
15.9
0.625
15.9
0.625
15.9
–
0.300
7.6
0.375
9.5
0.437
11.1
0.500
12.7
0.500
12.7
0.625
15.9
0.375
9.5
0.437
11.1
Units
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
Performance Characteristics
Test
Moisture Resistance
Thermal Shock
Load Life @ 70°C – 1,000 hrs.
Resistance to Soldering Heat
Short Time Overload
Dielectric Withstanding Voltage
Operating Temperature Range
Test Results
±5%
±2%
±5%
±2%
±2%
±2%
-55ºC to +275°C
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
60
email: marketing@seielect.com
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