POLYSWITCH RESETTABLE
DEVICES
Surface-Mount Devices
PolySwitch surface-mount devices are an effective circuit
protection method for computer, consumer, multimedia,
portable and automotive electronics applications.
In an affort to reduce the size and cost of surface-
mount devices, Littelfuse PolySwitch team introduced
the miniSMD product series in 1995. Subsequently,
we developed the microSMD, nanoSMD, picoSMD and
femtoSMD family of products. The femtoSMD series
reduced the device size to a 1608mm (0603 mils)
footprint, which is one-twelfth the size of the popular
miniSMD series.
Recent additions to the PolySwitch surface-mount series
include 1.1A picoSMD 1210mm (0805 mils) and 0.35A
femtoSMD 1608mm (0603 mils) devices.
BENEFITS APPLICATIONS
Smaller size helps save board space and cost Computer
Many product choices optimizes design flexibility Portable electronics
Compatible with high-volume electronics assembly Multimedia
Assists in meeting regulatory requirements Game machines
Higher voltage ratings allow use in new applications Telephony and broadband
Mobile phones
FEATURES Automotive
Industrial controls
RoHS compliant
Battery
Halogen free
(refers to: Br 900ppm, Cl 900ppm, Br+Cl 1500ppm)
Broadest range of resettable devices available in the
industry
Current ratings from 0.05 to 3.1A
Voltage ratings from 6V computer and electronic
applications to 60V telecom applications
Agency recognition: UL, CSA, TV
Small footprint
Fast time-to-trip
Low resistance
RoHS Compliant, ELV Compliant Halogen Free Specifications subject to change without notice. 2016 Littelfuse, Inc. 123
HFPolySwitch Resettable Devices
Surface-Mount Devices
Application Selection Table
The table below lists PolySwitch surface-mount devices recommended for use in typical applications
Specifications for the suggested PolySwitch surface-mount device part numbers can be found in this table
Once a part has been selected, the user should evaluate and test each product for the intended application
PolySwitch Resettable Devices - Key Selection Criteria
Overcurrent Fast Time-to-trip
Protection Application Additional Comments Overvoltage Small Size Low Resistance (Temperature Protection)
AC Adapter Input Power Use w/ Zener & Triac SMD250F SMD250F SMD200F
Battery Pack Protection nanoSMDC150F miniSMDC260F miniSMDE200F/16
Charger Protection nanoSMDC050F miniSMDC110F/16 nanoSMDC075F
CPU/IC Protection nanoSMDC110F nanoSMDC150F nanoSMDC075F
Data Acquisition/Sensor microSMD005F microSMD005F
DC Input/Output Power 6V nanoSMDC075F nanoSMDC150F nanoSMDC050F/13.2
12V miniSMDC075F miniSMDC110F/16 miniSMDC075F
DDC nanoSMDC075F nanoSMDC110F nanoSMDC050F/13.2
Device Bay System DB12, DB20 miniSMDC200F miniSMDC260F miniSMDC200F
DB32 miniSMDC260F SMD300F miniSMDC200F
Ethernet/LAN nanoSMDC050F/13.2 miniSMDC110F/16 nanoSMDC075F
Fan microSMD035F microSMD050F microSMD035F
HDMI picoSMDC035S picoSMDC035S picoSMDC035S
IEEE 802.3af VoIP decaSMDC050F/60 decaSMDC050F/60 decaSMDC050F/60
IEEE-1394 Power Provider SMD100F/33 SMD185F SMD100F/33
Alt. Power Provider SMD185F SMD185F SMD150F/33
Self-Powered SMD185F SMD185F SMD150F/33
LCD Inverter nanoSMDC050F/13.2 miniSMDC110F/16 nanoSMDC075F
LCD Screen Power nanoSMDC050F/13.2 nanoSMDC050F/13.2 microSMD035F
LNB (Low Noise Block) SMD075F SMD075F SMD050F
Motor 6V nanoSMDC110F nanoSMDC150F microSMD075F
13.2V miniSMDC075F miniSMDC110F/16 miniSMDC075F
PS/2 Mouse/Keyboard nanoSMDC075F nanoSMDC110F nanoSMDC050F/13.2
Signal - Data Communication 6V nanoSMDC075F nanoSMDC075F nanoSMDC075F
13.2V miniSMDC050F miniSMDC075F miniSMDC020F
30V SMD030F-2018 SMD075F SMD050F
SCSI nanoSMDC110F nanoSMDC150F nanoSMDC075F
SIM/Smart Card Reader femtoSMDC010F femtoSMDC010F femtoSMDC005F
Telecom - Modem Digital Line OC miniSMDC014F miniSMDC014F miniSMDC014F
Telecom - PBX Subscriber OC miniSMDC014F miniSMDC014F miniSMDC014F
Temperature Sensor CPU nanoSMDC050F/13.2 nanoSMDC075F nanoSMDC050F/13.2
USB Individual Port nanoSMDC075F nanoSMDC110F nanoSMDC050F/13.2
2 Port Ganged nanoSMDC150F miniSMDC150F miniSMDC125F
3 Port Ganged miniSMDC200F miniSMDC200F miniSMDC200F
Note: This list is not exhaustive. Littelfuse welcomes our customers input for additional application ideas for PolySwitch resettable devices.
124 Specifications subject to change without notice. 2016 Littelfuse, Inc. Halogen Free RoHS Compliant, ELV Compliant
HF