Rev Date: 01/25/2011 1 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
CB Series
Ceramic Housed with Axial Leads Wirewound Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Features:
• Fireproof power wirewound
• High thermal conductivity
• Non-inductive styles available
• Body standoffs available; add “F” after CB
• RoHS compliant / lead-free
0.5% 1% 5% 10%
CB 2 2W - - 0.1 - 300 0.1 - 300
CB 3 3W - - 0.1 - 680 0.1 - 680
CB 5 5W - - 0.1 - 680 0.1 - 680
CB 7 7W - - 0.1 - 1.5K 0.1 - 1.5K
CB 10 10W - - 0.1 - 2K 0.1 - 2K
CB 15 15W - - 0.15 - 2K 0.15 - 2K
CB 20 20W - - 0.2 - 2K 0.2 - 2K
CB 22 22W - - 1 - 250 1 - 250
CB 25 25W - - 0.2 - 2K 0.2 - 2K
CB 30 30W - - 1 - 250 1 - 250
WCB 2 2W 1 - 5K 0.1 - 5K 0.1 - 5K -
WCB 3 3W 1 - 10K 0.1 - 10K 0.1 - 10K -
WCB 5 5W 1 - 10K 0.1 - 10K 0.1 - 10K -
WCB 7 7W 1 - 15K 0.1 - 15K 0.1 - 15K -
WCB 10 10W 1 - 20K 0.1 - 20K 0.1 - 20K -
WCB 15 15W 1 - 20K 0.1 - 20K 0.1 - 20K -
MCB 3 3W - - 1 - 500K -
MCB 5 5W - - 1 - 500K -
MCB 7 7W - - 1 - 500K -
Resistance Temperature Coefficient Standard:
CB series: ±800ppm below 1Ω & ±300ppm for 1Ω and above; WCB series: ±50ppm from 0.1Ω to 10Ω & ±20ppm above 10Ω;
MCB series: ±200ppm
Ohmic Range(Ω) and Tolerance
Type / Code Power Rating
(Watts) @ 70ºC
Electrical Specifications
Power Derating Curve:
120
100
80
60
40
20
25 275 325
Ambient Temperature (ºC)
75 125 175 225
Percent Rated Power (%)
Rev Date: 01/25/2011 2 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
CB Series
Ceramic Housed with Axial Leads Wirewound Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
0.709 ± 0.039 0.276 ± 0.039 0.276 ± 0.039 0.025 ± 0.002 0.3 ± 0.039 inches
18.0 ± 1.0 7.0 ± 1.0 7.0 ± 1.0 0.65 ± 0.05 7.6 ± 1.0 mm
0.866 ± 0.039 0.312 ± 0.039 0.312 ± 0.039 0.032 ± 0.002 0.375 ± 0.039 inches
22.0 ± 1.0 8.0 ± 1.0 8.0 ± 1.0 0.81 ± 0.05 9.5 ± 1.0 mm
0.866 ± 0.039 0.394 ± 0.039 0.394 ± 0.039 0.032 ± 0.002 0.437 ± 0.039 inches
22.0 ± 1.0 10.0 ± 1.0 10.0 ± 1.0 0.81 ± 0.05 11.1 ± 1.0 mm
1.378 ± 0.039 0.394 ± 0.039 0.394 ± 0.039 0.032 ± 0.002 0.5 ± 0.039 inches
35.0 ± 1.0 10.0 ± 1.0 10.0 ± 1.0 0.81 ± 0.05 12.7 ± 1.0 mm
1.89 ± 0.039 0.394 ± 0.039 0.394 ± 0.039 0.032 ± 0.002 0.5 ± 0.039 inches
48.0 ± 1.0 10.0 ± 1.0 10.0 ± 1.0 0.81 ± 0.05 12.7 ± 1.0 mm
1.89 ± 0.039 0.492 ± 0.039 0.492 ± 0.039 0.032 ± 0.002 0.625 ± 0.039 inches
48.0 ± 1.0 12.5 ± 1.0 12.5 ± 1.0 0.81 ± 0.05 15.9 ± 1.0 mm
2.362 ± 0.039 0.571 ± 0.039 0.531 ± 0.039 0.032 ± 0.002 0.625 ± 0.039 inches
60.0 ± 1.0 14.5 ± 1.0 13.5 ± 1.0 0.81 ± 0.05 15.9 ± 1.0 mm
2.5 ± 0.039 0.5 ± 0.039 0.5 ± 0.039 0.036 ± 0.002 0.625 ± 0.039 inches
63.5 ± 1.0 12.7 ± 1.0 12.7 ± 1.0 0.91 ± 0.05 15.9 ± 1.0 mm
2.362 ± 0.039 0.571 ± 0.039 0.531 ± 0.039 0.032 ± 0.002 0.625 ± 0.039 inches
60 ± 1 14.5 ± 1.0 13.5 ± 1.0 0.81 ± 0.05 15.9 ± 1.0 mm
2.5 ± 0.039 0.625 ± 0.039 0.625 ± 0.039 0.036 ± 0.002 inches
63.5 ± 1.0 15.9 ± 1.0 15.9 ± 1.0 0.91 ± 0.05 mm
0.7 ± 0.039 0.245 ± 0.039 0.255 ± 0.039 0.032 ± 0.002 0.3 ± 0.039 inches
17.8 ± 1.0 6.2 ± 1.0 6.5 ± 1.0 0.81 ± 0.05 7.6 ± 1.0 mm
0.875 ± 0.039 0.312 ± 0.039 0.312 ± 0.039 0.032 ± 0.002 0.375 ± 0.039 inches
22.2 ± 1.0 7.9 ± 1.0 7.9 ± 1.0 0.81 ± 0.05 9.5 ± 1.0 mm
0.875 ± 0.039 0.375 ± 0.039 0.375 ± 0.039 0.032 ± 0.002 0.437 ± 0.039 inches
22.2 ± 1.0 9.5 ± 1.0 9.5 ± 1.0 0.81 ± 0.05 11.1 ± 1.0 mm
1.4 ± 0.039 0.375 ± 0.039 0.375 ± 0.039 0.036 ± 0.002 0.5 ± 0.039 inches
35.6 ± 1.0 9.5 ± 1.0 9.5 ± 1.0 0.91 ± 0.05 12.7 ± 1.0 mm
1.875 ± 0.039 0.375 ± 0.039 0.375 ± 0.039 0.036 ± 0.002 0.5 ± 0.039 inches
47.6 ± 1.0 9.5 ± 1.0 9.5 ± 1.0 0.91 ± 0.05 12.7 ± 1.0 mm
1.875 ± 0.039 0.5 ± 0.039 0.5 ± 0.039 0.036 ± 0.002 0.625 ± 0.039 inches
47.6 ± 1.0 12.7 ± 1.0 12.7 ± 1.0 0.91 ± 0.05 15.9 ± 1.0 mm
EUnAB C D
WCB 15
CB 2
CB 3
CB 20
CB 22
CB 25
CB 30
WCB 10
WCB 7 / MCB 7
CB 7
CB 10
CB 15
CB 5
Type / Code
-
WCB 2
WCB 3 / MCB 3
WCB 5 / MCB 5
its
Mechanical Specifications
± 5%
± 2%
± 5%
± 2%
± 2%
± 2%
Thermal Shock
Load Life @ 70°C - 1,000 hrs.
Test Test Results
Moisture Resistance
Operating Temperature Range: -55°C to +275°C
Dielectric Withstanding Voltage
Resistance to Soldering Heat
Short Time Overload - 5xPn for 5sec
Performance Characteristics
Rev Date: 01/25/2011 3 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
CB Series
Ceramic Housed with Axial Leads Wirewound Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Nominal
Resistance Tolerance
100 5%
Code Description Tolerance SEI Types Pkg Qty Description Code
CB 2 3 0.5% CB 2, CB 3, CB 5, MCB 3, MCB 5 750
WCB 5 7 1% WCB 2, WCB 3, WCB 5 500
MCB 10 15 5%
CBF 20 22 10%
WCBF 25 30 CB 20, CB 22, CB 25, CB 30 100
MCBF
NCB Non inductive
NCBF Non inductive
with standoff
bulk B
CB 2 B
Code
Standard
With standoff
CB 7, CB 10, CB 15, WCB 7,
WCB 10, WCB 15, MCB 7 250
SEI Type Code Packaging
How to Order
New part number format starting January 3rd, 2011:
123456789
CB2JB100R
Series Code
CB 2 Code Quantity
WCB 3D
MCB 5 F
CBF 7 J 500
WCBF 10 K
MCBR 15
NCB 20
NCBF 22 100
25
30
2
3
5
7
10
15
3
5
7
Packaging
WCB
MCB
1%
5%
10%
15W
3W
5W
7W
3W
5W
7W
10W
22W
25W
30W
2W
7W
10W
15W
20WNon-inductive
Non-inductive with standoff
Standard
With standoff bulk
MCB 7
CB 20, 22, 25, 30
CB 7, 10, 15
WCB 7, 10, 15
Four characters with
the multiplier used as
the decimal holder.
3.32 Kohm = 3K32
0.1 ohm = R100
33 ohm = 33R0
2W Tol
250
MCB 3, 5 750
3W 0.5%
WCB 2, 3, 5
5W
CB 2, 3, 5
CB B
Product Series Power Tolerance
Code Description Size
Resistance Value
How to Order
