Circuit Examples

PRF18 Series Characteristics

The POSISTORr has the

following advantages over

Bimetal devices.

1. Noise free

2. No contact problems

3. Low price

The POSISTORr has the

following additional advantages

over Zener Diodes.

1. Reduced numbers of parts

used in circuits

2. Reduced process costs of

mounting parts on PCBs

3. Reduces occupied space,

helping high density PCB

mounting

Bimetal

Zener Diode

POSISTORr

POSISTORr

PRF

+

-

PRF

Zener Diode

POSISTORr

Mounting Area

Parts

Parts

Diode

Transistor

Resistor

Op. Amp.

UPS

1

2

7

1

Parts

POSISTORr

Transistor

Resistor

Op. Amp.

UPS

1

1

2

0

Total

11

Total

4

Part Number

Characteristics

Resistance

(at +25

°C)

Sensing Temp. *

(at 4.7k ohm)

Maximum

Voltage

Operating Temp.

PRF18AS471QB1RB

PRF18AR471QB1RB

PRF18BA471QB1RB

PRF18BB471QB1RB

PRF18BC471QB1RB

PRF18BD471QB1RB

PRF18BE471QB1RB

PRF18BF471QB1RB

PRF18BG471QB1RB

AS

AR

BA

BB

BC

BD

BE

BF

BG

470 ohm

±50%

145

±5°C

135

±5°C

125

±5°C *

115

±5°C *

105

±5°C *

95

±5°C *

85

±5°C *

75

±5°C

65

±5°C

32VDC

Maximum

Current

30mA

-20 to +160

°C

-20 to +150

°C

-20 to +140

°C

-20 to +130

°C

-20 to +120

°C

-20 to +110

°C

-20 to +100

°C

-20 to + 90

°C

-20 to + 80

°C

(in mm)

Electrode

Construction

Cross-sectional

Nickel Barrier

Sn Plating

Ceramic

PTC

0.1-0.6

1.6

±0.15

0.8

±0.15

0.8

±0.15

* Also available with tolerance

Rating (0603) - Lead Free Terminations Type and UL1434 (except BF, BG types)

Dimensions

Part Number

Characteristics

Resistance

(at +25

°C)

Sensing Temp.

(at 4.7k ohm)

Maximum

Voltage

Operating Temp.

PRF18BA473QB1RB

Low Current Consumption!

BA

130

±5°C

-20 to +140

°C

New

470k ohm

±50%

32VDC

• This PDF catalog is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our

sales representatives or product engineers before ordering.

• This PDF catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.

!Note

R01E.pdf

06.1.25