CB Series — Ceramic Housed Wirewound with Axial Leads
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 / Code
Power Rating
(Watts) @ 70°C
2W
3W
5W
7W
10W
15W
20W
22W
25W
30W
2W
3W
5W
7W
10W
15W
3W
5W
7W
Ohmic Range and Tolerance
0.5%
–
–
–
–
–
–
–
–
–
–
1.0Ω – 5KΩ
1.0Ω – 10KΩ
1.0Ω – 10KΩ
1.0Ω – 15KΩ
1.0Ω – 20KΩ
1.0Ω – 20KΩ
–
–
-
1%
–
–
–
–
–
–
–
–
–
–
1.0Ω – 5KΩ
1.0Ω – 10KΩ
1.0Ω – 10KΩ
1.0Ω – 15KΩ
1.0Ω – 20KΩ
1.0Ω – 20KΩ
–
–
-
5%
0.10Ω – 300Ω
0.10Ω – 680Ω
0.10Ω – 680Ω
0.10Ω – 1.5KΩ
0.10Ω – 2.0KΩ
0.15Ω – 2.0KΩ
0.20Ω – 2.0KΩ
1.0Ω – 250Ω
0.20Ω – 2.0KΩ
1.0Ω – 250Ω
1.0Ω – 5KΩ
1.0Ω – 10KΩ
1.0Ω – 10KΩ
1.0Ω – 15KΩ
1.0Ω – 20KΩ
1.0Ω – 20KΩ
1.0Ω – 500KΩ
1.0Ω – 500KΩ
1.0Ω – 500KΩ
10%
0.10Ω – 300Ω
0.10Ω – 680Ω
0.10Ω – 680Ω
0.10Ω – 1.5KΩ
0.10Ω – 2.0KΩ
0.15Ω – 2.0KΩ
0.20Ω – 2.0KΩ
1.0Ω – 250Ω
0.20Ω – 2.0KΩ
1.0Ω – 250Ω
–
–
–
–
–
–
–
–
-
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
MCB 7
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
CBF
WCBF
MCBF
NWCB
NWCBF
Description
Standard
Code
2
5
3
7
Tolerance
0.5%
1%
5%
10%
SEI Type
CB 2, CB 3, CB 5, MCB 3, MCB 5
WCB 2, WCB 3, WCB 5
CB 7, CB 10, CB 15, WCB 7, WCB 10
WCB 15, MCB 7
CB 20, CB 22, CB 25, CB 30
Pkg Qty Description Code
750
500
250
100
Bulk
B
10 15
20 22
With Standoff
Non Inductive
Non Inductive
With Standoff
25 30
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
71
email: marketing@seielect.com
Rev 09/08
CB Series — Ceramic Housed Wirewound with Axial Leads
Body Standoff
Note:
CB - General Purpose Wirewound
WCB - Precision/Ceramic Wirewound
MCB - Metal Oxide Element
Mechanical Specifications
Type / Code
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 / MCB 3
WCB 5 / MCB5
WCB 7 / MCB 7
WCB 10
WCB 15
A
±0.039
±1.0
0.709
18.0
0.866
22.0
0.866
22.0
1.378
35.0
1.890
48.0
1.890
48.0
2.362
60.0
2.500
63.5
2.362
60.0
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
B
±0.039
±1.0
0.276
7.0
0.312
8.0
0.394
10.0
0.394
10.0
0.394
10.0
0.492
12.5
0.571
14.5
0.500
12.7
0.571
14.5
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
C
±0.039
±1.0
0.276
7.0
0.312
8.0
0.394
10.0
0.394
10.0
0.394
10.0
0.492
12.5
0.531
13.5
0.500
12.7
0.531
13.5
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
D
±0.002
±0.05
0.025
0.65
0.032
0.80
0.032
0.80
0.032
0.80
0.032
0.80
0.032
0.80
0.032
0.80
0.036
0.91
0.032
0.80
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
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
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
Performance Characteristics
Test
Moisture Resistance
Thermal Shock
Load Life @ 70°C – 1,000 hrs.
Resistance to Soldering Heat
Short Time Overload – 5xPn for 5sec
Dielectric Withstanding Voltage
Test Results
±5%
±2%
±5%
±2%
±2%
±2%
Operating Temperature Range : -55ºC to +275°C
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
72
email: marketing@seielect.com
Rev 09/08
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