CONSTRUCTION

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90/10 Tin-Lead

Solder Plating

Nickel Barrier

Thick Film Conductor

Substrate:

Alumina

Glass Passivation:

Glass Protective

Coating

Resistor:

Ruthenium Oxide

Model BSR Series

Short Time Overload, Max.

2.5 x rated voltage (

∆R ±1%+0.1 Ω)

Temperature Cycling

-55°C to +125°C, 5 cycles (

∆R ±5%+0.1 Ω)

Moisture Resistance

1,000 hours at 40°C, 95% RH (

∆R ±3%+0.1 Ω)

Load Life

1,000 hours at 70°C + Rated Voltage, Max. (

∆R ±3%+0.1 Ω)

Resistance to Solder Heat

260°C for 10 sec. (

∆R ±5%+0.1 Ω)

ENVIRONMENTAL

Surge Capability, Max.

1.2 / 50 µs, 250 V; 10 / 700 µs, 250 V (

∆R ±5%+0.1Ω)

Standard Resistance Range, Ohms

0.05 to 10000 Ohms

Standard Resistance Tolerances

±5%, ±10%, ±20% Optional : ±1%, ±2%

Operating Temperature Range

-55°C to +125°C

Temperature Coefficient of Resistance, Max.

±100ppm/°C above 10 Ohms

Power Ratings, Watts, at 70°C (See Note )

1 and 2

Operating Voltage, Max.

100 V dc or

√PR whichever is less

ELECTRICAL

sophisticated laser trimming to prevent flash over. In

the event of a very high voltage pulse the resistor will

go open-circuit preventing damage to surrounding

components or the printed circuit board. Two units are

required for each incoming line to protect both tip and

ring individually and collectively. The resistor is made

from nonflammable material.

The BSR Series is manufactured in BI’s highly

automated production facility in Glenrothes, Scotland,

which also produces standard 2512 chip resistors and

a wide range of chip resistor networks, R/C networks

as well as gull wing 14 and 16 lead resistor networks,

all of which are used on the PABX line card and in

many other areas of electronics.

APPLICATIONS

Note : For 2 watts limit part temperature to +155° C

5-8