PolySwitch®

PTC Devices

Overcurrent Protection Device

PRODUCT: RUSBF120

DOCUMENT: SCD25244

REV LETTER: F

REV DATE: JULY 26, 2016

PAGE NO.: 1 OF 2

© 2016 Littelfuse,Inc.

littelfuse.com

Specifications are subject to change without notice

Revised July 26,2016

Specification Status: Released

Electrical Rating

Current: 40A MAX

Insulating Material:

Cured, Flame Retardant Epoxy Polymer

meets

UL 94 V-O Requirements

Lead Material:

24 AWG Tin Plated Copper Clad Steel

Marking:

Manufacturer’s Mark

Lot Identification

and Part Identification

R120

TABLE I. DIMENSIONS:

A

B

C

D

E

MIN

MAX

MIN

MAX

MIN

MAX

MIN

MAX

MIN

MAX

mm:

--

6.9

--

11.7

4.3

5.9

7.6

--

--

3.1

in*:

--

(0.27)

--

(0.46)

(0.17)

(0.23)

(0.30)

--

--

(0.12)

TABLE II. PERFORMANCE RATINGS :

I HOLD

RATED

CURRENT

CURRENT

RATINGS

INITIAL RESISTANCE

VALUES

ONE HOUR

POST-TRIP

RESISTANCE

STANDARD

TRIP

TIME TO

TRIP

@ 8A

TRIPPED

-STATE

POWER

DISSIPAT

ION

AMPERS

AT 20

C

AMPERES

AT 20

C

OHMS

AT 20

C

OHMS

AT 20

C

SECONDS

AT

20

C

WATTS

AT 20

C

HOLD

HOLD

TRIP

MIN

TYP

MAX

MAX

1.2

1.2

2.0

0.07

0.08

0.0975

0.14

0.5

0.6

Agency Recognition:

UL, CSA, TUV

Reference Documents:

PS300

Precedence:

This specification takes precedence over documents referenced herein.

Effectivity:

Reference documents shall be the issue in effect on the date of invitation for bid.

CAUTION:

Operation beyond the rated voltage or current may result in rupture, electrical arcing or flame.

Materials Information

ROHS Compliant

ELV Compliant

Pb-Free

Halogen Free*

* Halogen Free refers to: Br≤900ppm, Cl≤900ppm, Br+Cl≤1500ppm.

HF