Overcurrent Protection Device
PolySwitch®
PTC Devices
PRODUCT: TRF250-183S
DOCUMENT: SCD26744
REV LETTER: F
REV DATE: JULY 26, 2016
PAGE NO.: 1 OF 2
Operating Conditions at 20°C:
Maximum Continuous Operating Voltage (V
MCO
): 100V
DC
Maximum Interrupt Current (I
INT
): 10A
RMS
Fault Ratings at 20°C:
250V
RMS
, 3A, 10 applications
Specification Status: Released
A
C
B
Additional Info at 20°C:
Resistance matched: n/a
Lightning withstand: 1.5 kV per ITU-T K.20, K.21
Helps equipment meet ITU-T K.20, K.21 Recommendations
Helps equipment meet Telcordia GR1089 intrabuilding requirements
Lead Material:
22 AWG Sn-Plated Copper (0.64 mm [0.025”] nominal diameter)
External Coating Material:
Cured, flame retardant epoxy polymer, meeting UL94 V-0 requirements
Marking:
D
E
(Center-to-Center)
TABLE I. DIMENSIONS:
MIN
MAX
MIN
mm:
--
7.5
--
in:*
--
(0.29)
--
*Rounded off approximation
HOLD
TRIP
CURRENT CURRENT
(A)
(A)
A
B
MAX
9.5
(0.37)
MIN
--
--
C
MAX
3.8
(0.15)
MIN
4.7
(0.19)
D
MAX
--
--
E
NOM
5.0
(0.20)
TABLE II. PERFORMANCE RATINGS @ 20°C:
RESISTANCE (Ω)
R MIN R MAX R
1 MAX
*
0.183
0.685
0.8
2.0
3.4
*Post Trip Resistance measured after one hour.
TIME TO TRIP(Sec)
OPERATING
@ 3A
TEMPERATURE
(°C)
TYP
MAX
MIN
MAX
0.55
1.8
-40
85
TRIPPED
POWER DISSIPATION
(W) @ 100V
DC
TYP
MAX
0.9
1.1
PART DESCRIPTION
TRF250-183S
TRF250-183S-2
TABLE III. APPLICABLE PART DESCRIPTIONS:
Bulk
PACKAGING TYPE
NOTES
N/A
Dim “D” not applicable
Tape and Reel
Materials Information
ROHS Compliant
Agency Recognitions:
Reference Documents:
Precedence:
Effectivity:
CAUTION:
UL (File #E74889), CSA (File #78165C), TUV
PS300, ITU-T K.20, K.21
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.
ELV Compliant
Pb-Free
© 2016 Littelfuse,Inc.
Specifications are subject to change without notice.
Revised July 26, 2016
littelfuse.com
Overcurrent Protection Device
PolySwitch®
PTC Devices
PRODUCT: TRF250-183S
DOCUMENT: SCD26744
REV LETTER: F
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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