Characteristics - Electrical

Resistance Values:

Series E24 5% E12 10% (see tables for value

limits per style)

Resistance Tolerance:

±5% ±10%

Maximum Continuous Voltage:

√P x R

Load Life:

ΔR <±3% 1000 hours at 70°C

Power Rating:

See Surface Temperature Curve (below)

Characteristics - Environmental and Mechanical

Temperature Coefficient of Resistance:

200ppm/°C (400ppm/°C below 18R)

Resistance to Solder Heat:

ΔR < 0.2% (350°C for 2.5 seconds)

Voltage Coefficient of Resistance:

Negligible

Operating Temperature Range:

-55°C to +350°C

Load Stability:

ΔR < 5% (full load at 70°C for 1000 hours)

Long Term Damp Heat:

ΔR < 0.2% (21 days at 40°C for 93% humidity)

Shelf Life:

ΔR < 1.0% (per 12 months)

Insulation Resistance:

> 10000M

Dielectric Strength:

2000V RMS

Lead Material:

Steel - Solder coat

Marking:

Legend mark, Manufacturer name, type, ohmic value

and tolerance.

Surface Temperature Rise Curve

Derating Curve

250

200

150

100

50

0

125

100

80

60

40

20

0

02

4

6

8

10

12

14

16

18

Power in Watts

25

75

125

175

225

275

325

375

Ambient Temperature

NB - SBC Series will

run 15°C hotter than

described here

High Power Resistor

Type SBC (Square Ceramic) Series

1773278 CIS BI 06/2011

Dimensions are in millimeters

Dimensions are shown for

For email, phone or live chat, go to: te.com/help

and inches unless otherwise

reference purposes only.

specified. Values in brackets

Specifications subject

are standard equivalents.

to change.

Key Features

Resistance

Invited

Distribution

This range of Power Wirewound Resistors are wound on continuous glass fibre elements

or have a ceramic core depending on resistance value. The element is housed in a

ceramic case and sealed with an inorganic silica filler. Their construction gives a resistor

with high insulation resistance and low surface temperature, capable of withstanding high

overload currents. These resistors are ideally suited to a variety of applications within

industrial and commercial environments, where performance and reliability are of prime

importance. Applications include fan force ovens, cooker hoods, power supplies and triac

based speed controls. Custom Design Variants in value and style are welcomed.