Definitions
Voltage Rating for Telecom Devices
Agency approvals for PolySwitch devices:
I
= Hold current—maximum current at which the
For Raychem Circuit Protection telecom
devices (TC, TGC, TRx, TSx) there are
two applicable voltage ratings. These are
PolySwitch devices, where appropriate,
have been tested and have gained the
following safety agency approvals:
• UL Component Recognition in Category
XGPU2, Thermistor Type Devices
• CSA Component Acceptance Class
9073 32, Thermistors—PTC Type
H
device will not trip under specified conditions at
20°C unless otherwise specified.
V
Operating and V
Interrupt. To
max.
max.
I
= The highest fault current that can safely
help understand the nature of these two
different voltage ratings the following
definitions are provided:
max.
be used to trip a PolySwitch device under
specified conditions.
¨
• TUV Rheinland Certification, PTC
V
= The highest voltage that can safely be
V
Interrupt: Under specified
max.
Resistors
max.
dropped across a PolySwitch device
continuously in its tripped state under specified
fault conditions.
conditions this is the highest voltage
that can be applied to the device at the
maximum current. Devices have been
designed to trip safely under higher power
level cross conditions, as listed above, to
assist equipment in meeting the
®
R max. = Maximum device resistance under
1
®
specified conditions measured 1 hour post trip or
post reflow.
appropriate industry conditions.
R max. = Maximum device resistance under
automotive conditions specified in PS400
measured 1 hour after stress has been removed.
V
Operating: For telecom devices
a
max.
this is the voltage we have used to obtain
component recognition under UL1434.
Most Raychem Circuit Protection devices
(TC, TGC, TRx, TSx) are certified at 60V
but can withstand higher Vmax. TR600 and
TS600 product families are certified at
250V but can withstand higher Vmax.
Interrupt conditions as noted above.
Rmax. Initial = Maximum device resistance
under specified conditions as supplied.
I
= Minimum current at which a device will trip
T
under specified conditions.
For the purposes of this brochure we have
included in the table of electrical ratings
WARNING!
the more applicable V
Interrupt value.
max.
• Operation beyond maximum ratings or improper
use may result in device damage and possible
electrical arcing and flame.
• These devices are intended for protection
against occasional overcurrent or overtemper-
ature fault conditions, and should not be used
when repeated fault conditions are anticipated.
• TR and TS devices are not intended for contin-
uous utility line voltage such as 120/220V or
240V.
• LVR Product Notes:
Standard PolySwitch product families
include, RGEF, RHEF, RTEF, RUEF, RXEF,
LVR, SMDF, nanoSMDF, microSMDF,
miniSMDF, BBRF, LR4F, LTPF, SRPF,
VTPF, VLRF, VLPF, AHRF, AGRF, and
AHS. PolySwitch TS, TR and ASMD
product families offer a selected number of
RoHS compliant parts. In addition, special
devices, such as speaker devices (SPK),
terminal devices (TD) and custom chip
devices, can be manufactured to meet
performance requirements that could be
outside of the performance band of the
standard products listed in this short form
catalog. Please contact a Raychem Circuit
Protection Customer Service representative
to discuss your special product needs.
1. A PTC device is not a fuse—it is a nonlinear
thermistor that limits current. Because under a
fault condition all PTC devices go into a high
resistance state but not open circuit, hazardous
voltage may be present at PTC locations.
2. The devices are intended for protection
against occasional overcurrent or
overtemperature fault conditions and should not
be used when repeated fault conditions or
prolonged trip events are anticipated.
3. Please refer to the SCD for complete
information and applications limitations, which
can be obtained from product management
(650-361-6900) or the web:
www.circuitprotection.com/lvr/
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