American Accurate Components, Inc.

HIGH POWER RESISTOR – Non Inductive Chassis Mount, Screw Terminal

The content of this specification may change without notification 02/19/08

188 Technology Drive, Unit H, Irvine, CA 92618

TEL: 949-453-9888

FAX: 949-453-8889

2

SPECIFICATIONS

Series

Body Type/Circuit

Rated

Power

Resistance

Resistance

Range (

Ω)

EIA Values

TCR

(ppm/°C)

Tolerance

Operating Temp.

RST15*-

A4X, A4Y

150 W

Dual

0.1 ~ 1.0K

E24

±100

±5%

-55°C ~ +155°C

RST15-

B4X, B4Y

150 W

Dual

0.1 ~ 1.0K

E24

±100

±5%

-55°C ~ +120°C

RST20*-

A2X, A2Y, A4Z

200 W

Single

0.1 ~ 1.0K

E24

±100

±5%

-55°C ~ +155°C

RST20-

B2X, B2Y, B4Z

200 W

Single

0.1 ~ 1.0K

E24

±100

±5%

-55°C ~ +120°C

RST25*-

A4X

250 W

Dual

1.0 ~ 1.0K

E24

±100

±5%

-55°C ~ +120°C

RST25-

B4X, B4Y

250 W

Dual

0.1 ~ 1.0K

E24

±100

±5%

-55°C ~ +120°C

RST30*-

A4Z

300 W

Single

1.0 ~ 1.0K

E24

±100

±5%

-55°C ~ +120°C

RST30-

B2X, B2Y, B4Z

300 W

Single

0.1 ~ 1.0K

E24

±100

±5%

-55°C ~ +120°C

RST55-

B4X, B4Y

550 W

Dual

50.0 ~ 1.0K

E24

±100

±5%

-55°C ~ +120°C

RST60-

A4X

600 W

Dual

100 ~ 1.0K

All

±100

±10%

-55°C ~ +155°C

RST60-

B2X, B2Y, B4Z

600 W

Single

50.0 ~ 1.0K

E24

±100

±5%

-55°C ~ +120°C

RST90-

A4Z

600 W

Single

100 ~ 1.0K

All

±100

±10%

-55°C ~ +155°C

PERFORMANCE

Item

RST15*, RST20*

All other Series

Condition

Rated Power

Per specification

Per specification

RST15, RST20: with heat sink, 0.9 K/W

All Other Models: at flange -55°C ~ +25°C

Maximum Applied Voltage

E = √P*R

E = √P*R

Withstanding Voltage

2500V DC

2500V DC

60 seconds

Load Life

± (1.0% + 0.05 Ω)

± (1.0% + 0.05 Ω)

25°C, 90 min on, 30 min off, 1000 hrs

Humidity

± (1.0% + 0.05 Ω)

± (1.0% + 0.05 Ω)

40°C, 90 ~ 95% RH, DC 0.1W, 1000 hrs

*70°C, 90 ~ 95% RH, DC 0.1W, 1000 hrs

Temperature Cycle

± (1.0% + 0.05 Ω)

± (1.0% + 0.05 Ω)

-55°C, 30 min., +155°C, 30 min.; 20 cycles

-55°C, 30 min., +120°C, 30 min.; 20 cycles

Short Time Overload

± (0.25% + 0.05 Ω)

± (0.25% + 0.05 Ω)

Rated Power x 2.5, 2 sec. with heat sink

Soldering Heat

n/a

± (0.25% + 0.05 Ω)

350°C

± 5°C, 3 seconds

Solderability

n/a

n/a

Insulation Resistance

> 1,000 Meg ohm

> 1,000 Meg ohm

Between Terminals and Flange

Vibration

± (0.25% + 0.05 Ω)

± (0.25% + 0.05 Ω)

Flammability

UL94V-O

UL94V-O

PULSE OPERATION DURABLITY

1 = RST30- B2X, B2Y, B4Z

2 = RST25-B4X, B4Y (one resistor)

The figure illustrating pulse load shows the safe operation area, which measured

experimentally and which can operate with a rectangle pulse of a long cycle. However,

data does not guarantee the operation about the continuous pulse load of a short cycle in

which a resistor carries out a temperature rise with average electric power. Pulse peak

power recommends operating within the rated electric power. Pulse operation of models

RST60-B2X, B2Y, B4Z are the same as models RST30- B2X, B2Y, B4Z.

NOTES

For RST60-A4X and RST90-A4Z

When water cooled heat sink is used, maintaining a flange temperature of 25°C is difficult.

When the flange temperature is over 25°C, the rating will be decreased as illustrated in

the derating curve. In short pulse applications, the peak power can not exceed over

600W.

Pulse Peak Power (Watts)

Pulse Width (seconds)