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TRF250-184

P1-P3
PolySwitch®
PTC Devices
Overcurrent Protection Device
PRODUCT: TRF250-184
DOCUMENT: SCD27165
REV LETTER: D
REV DATE: JULY 26, 2016
PAGE NO.: Page 1 of 3
© 2016 Littelfuse,Inc. littelfuse.com
Specifications are subject to change without notice.
Revised July 26,2016
Specification Status: Released
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:
250 V
RMS
, 3A, 10 applications
(See page 2 of this SCD for further application fault ratings)
Additional Info at 20°C:
Resistance matched: n/a
Lightning withstand: 4.0 kV with primary protection 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:
TABLE I. DIMENSIONS:
A
C
D
E
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
NOM
mm:
--
7.7
--
10.5
--
4.6
4.7
--
5.0
in:*
--
(0.30)
--
(0.41)
--
(0.18)
(0.19)
--
(0.20)
*Rounded off approximation
TABLE II. PERFORMANCE RATINGS @ 20°C: As measured in Mueller Kelvin Clips:
HOLD
CURRENT
(A)
TRIP
CURRENT
(A)
RESISTANCE (Ω)
TIME TO TRIP(Sec)
@ 3A
OPERATING
TEMPERATURE
(°C)
TRIPPED
POWER DISSIPATION
(W) @ 100V
DC
R MIN
R MAX
R
1 MAX
*
TYP
MAX
MIN
MAX
TYP
MAX
0.184
1.0
1.2
2.4
3.1
0.5
1.3
0
85
0.9
1.1
*Post Trip Resistance measured after one hour.
TABLE III. APPLICABLE PART DESCRIPTIONS:
PART DESCRIPTION
PACKAGING TYPE
NOTES
TRF250-184
Bulk
N/A
Agency Recognitions: UL (File # E74889), CSA (File #1026908), and TUV (License #R72041425).
Reference Documents: PS300, ITU-T K.20, K.21
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
PolySwitch®
PTC Devices
Overcurrent Protection Device
PRODUCT: TRF250-184
DOCUMENT: SCD27165
REV LETTER: D
REV DATE: JULY 26, 2016
PAGE NO.: Page 2 of 3
© 2016 Littelfuse,Inc. littelfuse.com
Specifications are subject to change without notice.
Revised July 26,2016
Additional Application Fault Ratings at 20°C
I) Power contact: 250 V
RMS
, 10load in series with TRF250-184, 1 application, t = 15 min (see Test Schematic 1 below).
– Meets Acceptance Criterion A or B of ITU-T K.20, K.21.
Test Schematic 1: 250 V
RMS
, 10load in series with TRF250-184:
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
II) Power contact: 250 V
RMS
, sequentially testing at 10204080160300600 in series with TRF250-184 & SiBar
TM
devices,
total 7 applications, t = 2 min at each load, 5 min wait between applications (see Test Schematic 2 below).
– Tested (a) to (b) with ungrounded circuit.
– Tested either transversely [ a- terminal and ground together to b- terminal,
b-terminal and ground together to a- terminal ], or port-to-earth [ (a and b) together to ground with grounded circuit.
– Meets Acceptance Criterion A or B of ITU-T K.20, K.21.
Test Schematic 2: 250 V
RMS
, 10 to 600load in series with TRF250-184 & SiBar devices:
Ungrounded circuit Grounded circuit
Note:
1) SiBar device (TVB275NSB-L): V
DM
= 275V maximum, V
BO
= of 350V maximum, I
PP
= 100A (V
OC
10/700s).

III) Power induction (10A
2
s): 447
RMS
(t = 2.0s) to 1500 V
RMS
(t=0.18s), 200load in series with TRF250-184 & SiBar devices with primary
protection, 5 applications, 1 min wait between applications (see Test Schematic 3 below).
– Tested (a) to (b) with ungrounded circuit.
– Tested either transversely [ a- terminal and ground together to b- terminal,
b-terminal and ground together to a- terminal ], or port-to-earth [ (a and b) together to ground with grounded circuit.
– Meets Acceptance Criterion A or B of ITU-T K.20, K.21.
Test Schematic 3: 447
RMS
(t = 2.0s) to 1500 V
RMS
(t=0.18s), 200load in series with TRF250-184, SiBar, GDT devices:
Ungrounded circuit Grounded circuit

Note:
1) SiBar device (TVB275NSB-L): V
DM
= 275V maximum, V
BO
= of 350V maximum, I
PP
= 100A (V
OC
10/700s)
2) GDT device (GTCA28-421M-R10 for ungrounded circuit and GTCR(A)38-421M-R10 for grounded circuit): Nominal DC sparkover
voltage = 420V @100V/s
PolySwitch®
PTC Devices
Overcurrent Protection Device
PRODUCT: TRF250-184
DOCUMENT: SCD27165
REV LETTER: D
REV DATE: JULY 26, 2016
PAGE NO.: Page 3 of 3
© 2016 Littelfuse,Inc. littelfuse.com
Specifications are subject to change without notice.
Revised July 26,2016
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.
P1-P3

TRF250-184

Mfr. #:
Buy TRF250-184
Manufacturer:
Littelfuse
Description:
Resettable Fuses - PPTC 100Vdc 10Arms PolySwitch Reset Dev
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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