PolySwitch®
PTC Devices
Overcurrent Protection Device
PRODUCT: RUEF400K
DOCUMENT: SCD25700
REV LETTER: G
REV DATE: JULY 26, 2016
PAGE NO.: 1 OF 2
Specification Status: Released
Maximum Electrical Rating at
20°C
30 V
DC
/100 A
DC
30 V
AC
/70 A
RMS
Insulating Material:
Cured, Flame Retardant Epoxy Polymer
meets UL94 V-0 Requirements
Lead Material:
20 AWG Tin Plated Copper
Marking:
Manufacturer’s Mark
U400
and Part Identification
Lot Identification
TABLE I. DIMENSIONS:
mm:
in*:
A
B
MIN
MAX
MIN
MAX
--
14.0
--
21.3
--
(0.55)
--
(0.84)
*Rounded off approximation
C
MIN
4.3
(0.17)
MAX
5.8
(0.23)
MIN
7.6
(0.30)
D
MAX
--
--
MIN
--
--
E
MAX
3.0
(0.12)
TABLE II. PERFORMANCE RATINGS:
I HOLD
CURRENT
RATINGS
TIME TO
TRIP
RESISTANCE
ONE-HOUR
POST-TRIP
RESISTANCE
STANDARD
TRIP
OHMS
AT 20°C
MAX
0.05
TRIPPED POWER
DISSIPATION
AMPS
20°C
HOLD
4.00
AMPS AT
20°C
HOLD
TRIP
4.00
8.00
SECONDS AT
20°C, 20.0A
MAX
12.7
OHMS
AT 20.0° C
MIN
MAX
0.01
0.03
WATTS AT
20°C
NOMINAL
2.50
WATTS AT
20°C
MAX
2.68
Agency Recognitions:
Reference Documents:
Precedence:
Effectivity:
CAUTION:
UL, CSA, TUV, CQC
PS300
This specification takes precedence over documents referenced herein.
Reference documents shall be the issue in effect on the date of invitation for bid.
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*
HF
* Halogen Free refers to: Br≤900ppm, Cl≤900ppm, Br+Cl≤1500ppm.
© 2016 Littelfuse,Inc
Specifications are subject to change without notice.
Revised July 26, 2016
Littelfuse.com
PolySwitch®
PTC Devices
Overcurrent Protection Device
PRODUCT: RUEF400K
DOCUMENT: SCD25700
REV LETTER: G
REV DATE: JULY 26, 2016
PAGE NO.: 2 OF 2
Information
furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their
own applications. Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, military, aerospace, medical, lifesaving,
life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired
operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation.
Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall
not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse
documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse.
© 2016 Littelfuse,Inc
Specifications are subject to change without notice.
Revised July 26, 2016
Littelfuse.com
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