PolySwitch®
PTC Devices
Overcurrent Protection Device
PRODUCT: TRF250-120T-RA-B-0.5
DOCUMENT: SCD26216
REV LETTER: E
REV DATE: MAY 11, 2011
PAGE NO.: 1 OF 1
Specification Status: Released
Operating Conditions at 20°C:
Maximum Continuous Operating Voltage (VMCO): 60VDC
Maximum Interrupt Current (IINT ): 3ARMS
Fault Ratings at 20°C:
250 VRMS, 3A, 10 applications
Additional Info at 20°C:
Resistance matched: 0.5 Ohm
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:
TABLE I. DIMENSIONS:
A B C D E F
MIN MAX MIN MAX MIN MAX MIN MAX NOM MAX
mm:
-- 6.5 -- 11.0 -- 4.6 4.7 -- 5.0 7.0
in:* -- (0.26) -- (0.43) -- (0.18) (0.19) -- (0.20) (0.28)
*Rounded off approximation
TABLE II. PERFORMANCE RATINGS @ 20°C:
HOLD
CURRENT
(A)
TRIP
CURRENT
(A)
RESISTANCE (Ω) TIME TO TRIP(Sec)
@ 1A
OPERATING
TEMPERATURE
(°C)
TRIPPED
POWER DISSIPATION
(W) @ 60VDC
R MIN R MAX
R1 MAX* TYP MIN MAX TYP MAX
0.120 0.240 7.0 9.0 16.0 1.2 -40 85 0.8 0.9
*Maximum device resistance at 20°C measured 1 hour post trip
TABLE III. APPLICABLE PART DESCRIPTIONS:
PART DESCRIPTION PACKAGING TYPE NOTES
TRF250-120T-RA-B-0.5 Bulk N/A
Agency Recognitions: UL (File #E74889), CSA (File #78165), TUV
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
© 2006, 2011 Tyco Electronics Corporation, a TE Connectivity Ltd. Company. All rights reserved.
