PolySwitch®
PTC Devices
Overcurrent Protection Device
PRODUCT: TRF250-120UT
DOCUMENT: SCD26218
REV LETTER: E
REV DATE: JULY 26 2016
PAGE NO.: 1 OF 2
Specification Status: Released
Operating Conditions at 20°C:
Maximum Continuous Operating Voltage (V
MCO
): 60V
DC
Maximum Interrupt Current (I
INT
): 3A
RMS
Fault Ratings at 20°C:
250V
RMS
, 3A, 10 applications
Additional Info at 20°C:
Resistance matched: n/a
Lightning withstand: 1.5kV per ITU-T K.20
Helps equipment meet ITU-T K.20 Recommendations
Helps equipment meet Telcordia GR1089 intrabuilding
requirements
Lead Material:
22 AWG Sn-Plated Copper (0.64 mm [0.025”] nominal
diameter)
Marking:
TABLE I. DIMENSIONS:
A
MIN
mm:
in:*
--
--
MAX
6.0
(0.24)
MIN
--
--
B
MAX
10.0
(0.39)
MIN
--
--
C
MAX
3.8
(0.15)
MIN
4.7
(0.19)
D
MAX
--
--
E
NOM
5.0
(0.20)
F
MIN
--
--
MAX
6.0
(0.24)
*Rounded off approximation
TABLE II. PERFORMANCE RATINGS @ 20°C :
HOLD
TRIP
CURRENT CURRENT
(A)
(A)
RESISTANCE (Ω)
TIME TO TRIP(Sec)
@ 1A
MAX
1.5
OPERATING
TRIPPED
TEMPERATURE POWER DISSIPATION
(°C)
(W) 60V
DC**
MIN
MAX
TYP
MAX
-40
85
0.7
0.8
R MIN R MAX R
1 MAX
*
TYP
0.120
0.240
7.0
12.0
16.0
0.7
*Maximum device resistance at 20°C measured after 1 hour post trip
TABLE III. APPLICABLE PART DESCRIPTIONS:
PART DESCRIPTION
TRF250-120UT
PACKAGING TYPE
Bulk
NOTES
N/A
Agency Recognitions:
Reference Documents:
Precedence:
Effectivity:
CAUTION:
UL (File #E74889), CSA (File #78165C), TUV
PS300, ITU-T K.20
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
Materials Information
ROHS Compliant
© 2016 Littelfuse,Inc.
Specifications are subject to change without notice.
Revised July 26,2016
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