Radial-leaded
PolySwitch Radial-leaded
Resettable Devices
Raychem Circuit Protection has
pioneered PPTC technology for
over twenty years. Our radial-
leaded products represent the
widest range of product capabilities.
• RGE series for hold currents up
to 14A
• RHE series for flatter thermal
derating and operating tempera-
tures up to 125°C
• RUE series for balance of volt-
age rating (30V) and hold current
(up to 9A)
• RUSB series for fast time-to-trip
and low-resistance computer
applications
• RTE series specifically designed
for IEEE-1394 applications
• RXE series for low hold currents
(down to 50mA) and high volt-
age rating (up to 72V)
• TR600 series for North America
telephone applications
• TR250 series for ITU telephone
applications
• BBR series for cable telephone
applications
Whether for design or volume
application, our radial-leaded
products represent the most
comprehensive and complete set
of PPTC products available in
the industry today.
4
Features:
• Broadest range of radial-leaded
resettable devices available in
the industry
• Current ratings from 50mA to
14A
• Voltage ratings from 6V (computer
and electronic applications) to 90V
(cable and telecommunication
equipment)
• Agency recognition: UL, CSA,
TÜV
• Fast time-to-trip
• Low resistance
Applications:
• Satellite video receivers
• Industrial controls
• Transformers
• Computer motherboards
• Modems
• USB hub, ports and peripherals
• IEEE1394 ports
• CD-ROMs
• Game machines
• Battery packs
• Phones
• Fax machines
• Analog and digital line cards
• Printers
Benefits:
• Many product choices give
engineers more design flexibility
• Compatible with high-volume
electronics assembly
• Assists in meeting regulatory
requirements
• Higher voltage ratings allow use
in new applications
Devices in this section are grouped by:
Voltage Rating, Device Series, Hold Current
Raychem Circuit Protection Devices
PolySwitch Radial-leaded Resettable Devices
205
Selection Guide for Radial-leaded Devices
Step 1.
Determine the circuit’s operating parameters.
Fill in the following information about the circuit:
Maximum ambient operating temperature
Normal operating current
Maximum operating voltage
(i.e., RUE135 is 30V max.)
Maximum interrupt current
Step 2.
Select the PolySwitch device that will accommodate the
circuit’s maximum ambient temperature and normal operating
current.
Look across the top of Table R2 to find the temperature that most
closely matches the circuit’s maximum operating temperature. Look
down that column to find the value equal to or greater than the circuit’s
normal operating current. Now look to the far left of that row to find the
part number for the PolySwitch device that will best accommodate the
circuit. Devices in this section are grouped by voltage rating; therefore,
your operating current requirement may be found in more than one
product grouping.
The thermal derating curves located in Figures R1–R4 are the normal-
ized representations of the data in Table R2.
Step 3.
Compare the maximum electrical ratings of the selected
device with the maximum operating voltage and maximum inter-
rupt currents of the circuit.
Look down the first column of Table R3 to find the part number you
selected in Step 2. Look to the right in that row to find the device’s
maximum operating voltage (V
MAX
) and maximum interrupt current
(I
MAX
). Ensure that V
MAX
and I
MAX
are greater than or equal to operating
voltage and maximum interrupt current.
4
206
PolySwitch Radial-leaded Resettable Devices
Raychem Circuit Protection Devices
Radial-leaded
Step 4.
Determine time-to-trip.
Time-to-trip is the amount of time it takes for a device to switch
to a high-resistance state once a fault current has been applied
across the device. Identifying the PolySwitch device’s time-to-
trip is important in order to provide the desired protection
capabilities. If the device you choose trips too fast, undesired
or nuisance tripping will occur. If the device trips too slowly, the
components being protected may be damaged before the
device switches to a high-resistance state.
Refer to the typical time-to-trip curves for each of the
PolySwitch devices found in Figures R16–R21.
If the time-to-trip of the PolySwitch device is too fast or too slow
for the circuit, go back to Step 2 and choose an alternate
device.
Step 5.
Verify ambient operating conditions.
Ensure that your application’s minimum and maximum ambient
temperatures are within the operating temperature of -40°C to
85°C (-40 to 125°C for RHE device series).
Step 6.
Verify the PolySwitch device dimensions.
Using the dimensions in Table R4, compare the dimensions of
the PolySwitch device you selected with the application’s space
considerations.
4
Raychem Circuit Protection Devices
PolySwitch Radial-leaded Resettable Devices
207
Protection Application Selection Guide for Radial-leaded Devices
The guide below lists PolySwitch
devices that are typically used in
these applications.
Specifications for the suggested
device part numbers can be
found in this section.
Once a part number has been
selected, the user should evalu-
ate and test each product for its
intended application.
Protection Application
Electromagnetic loads
Halogen lighting
Lighting ballast
Loudspeakers
Medical equipment
MOSFET devices
Motors, fans, and blowers
POS equipment
Process and industrial controls
Satellite video receivers
Security and fire alarm systems
Test and measurement equipment
Transformers
UL1950/FCC Part 68 requirements
DDC computer video ports
PolySwitch Resettable Devices—Key Selection Criteria
Flatter
Lower Current
Small Size
Derating
Higher Voltage
RGE (<16V), RUE (<30V)
RGE (<16V), RUE (<30V)
RXE, BBR
RXE
RGE (<16V), RUE (<30V)
RGE (<16V), RUE (<30V)
RXE (<72V), RGE (<16V)
RXE, RUE
RXE, RUE
RGE (<16V), RUE (<30V)
RGE (<16V), RUE (<30V)
RGE (<16V), RUE (<30V)
RGE (<16V), RUE (<30V)
RXE
RUE
RTE
RUE
RUE
RUSB
RGE (<16V), RUE (<30V)
RHE (<16V)
RXE
RHE (<16V)
RHE (<16V)
RHE (<16V)
RHE (<16V)
RXE
RXE
RXE
RXE
RHE (<16V)
RHE (<16V)
RHE (<16V)
RXE
RXE
RHE (<16V)
RHE (<16V)
RXE
RXE
4
IEEE-1394 computer and consumer electronics
Mouse and keyboard
SCSI
USB
Traces and printed circuit board protection
This list is not exhaustive. Raychem Circuit Protection welcomes customer's input for additional application ideas for PolySwitch resettable devices.
208
PolySwitch Radial-leaded Resettable Devices
Raychem Circuit Protection Devices
Radial-leaded
Table R1. Product Series – Current Rating, Voltage Rating/Typical Resistance for Radial-leaded Devices
Voltage Rating
Hold Current (A)
0.050
0.080
0.100
0.110
0.120
0.145
0.150
0.160
0.170
0.180
0.200
0.250
0.300
0.400
0.500
0.550
0.650
0.700
0.750
0.900
1.10
1.20
1.35
1.55
1.60
1.85
1.90
2.50
3.00
3.75
4.00
4.50
5.00
6.00
6.50
7.00
7.50
8.00
9.00
10.0
11.0
12.0
13.0
BBR
90V
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.67Ω
—
—
0.56Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
TR600
60/600V*
—
—
—
—
—
—
—
9.0Ω
7.0Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
TR250
60/250V*
—
—
17.0Ω
—
—
6.0Ω
4.5Ω
—
—
—
1.4Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
RXE
72V
—
—
—
—
—
—
—
—
—
—
—
2.29Ω
1.60Ω
1.11Ω
0.71Ω
0.64Ω
—
0.40Ω
—
0.325Ω
0.255Ω
0.200Ω
—
0.155Ω
—
0.115Ω
0.100Ω
—
0.065Ω
0.050Ω
0.040Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
RXE
60V
9.2Ω
10.0Ω
—
3.50Ω
—
—
—
—
—
4.30Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
RTE
33V
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.097Ω
0.080Ω
—
—
—
0.054Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
RUE
30V
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.095Ω
0.075Ω
—
0.060Ω
—
0.050Ω
0.045Ω
—
0.030Ω
0.035Ω
—
0.020Ω
—
0.020Ω
0.013Ω
—
0.013Ω
—
0.013Ω
0.008Ω
—
—
—
—
—
RGE
16V
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.0514Ω
—
0.030Ω
—
0.0192Ω
0.0145Ω
—
0.0105Ω
—
0.0086Ω
0.0070Ω
0.0056Ω
0.0050Ω
0.0046Ω
—
0.0040Ω
RHE
16V
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.42Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
0.029Ω
—
0.0175Ω
0.0144Ω
—
0.0173Ω
—
—
0.0083Ω
—
—
0.0055Ω
—
RUSB
16V
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.10Ω
0.075Ω
—
0.060Ω
—
0.050Ω
0.045Ω
—
0.030Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
RUSB
6V
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.14Ω
—
—
0.080Ω
—
0.058Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
4
14.0
—
—
—
—
—
—
*
Refer to Telecommunications and Networking section for specific voltage rating information.
Raychem Circuit Protection Devices
PolySwitch Radial-leaded Resettable Devices
209
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