Electronic Design

Component Specifier: Circuit Protection


CIRCUIT PROTECTION
TYPE/Model Features P&A Source
N-CHANNEL MOSFET
NUD3048
Features 100-V breakdown voltage and 100-V buffered gate voltage rating; functions as a level shifter, a power-good signal, an inrush limiter, and a relay drive circuit; integrates a gate-to-source zener clamp, electrostatic-discharge protection diodes, and a 100-kO gate resistor to shorten bill-of-materials list and reduce pc-board space usage; its TSOP package has 0.72-O maximum on-resistance $0.17 each in 10,000-unit lots; eight to 12 weeks ON Semiconductor
(602) 244-6600
www.onsemi.com
SURFACE-MOUNT FUSE
USF 1206
Thin-film chip fuse has an interrupt rating of 50 A at 63 V dc; measures 1.6 by 3.2 by 0.6 mm; built according to UL 248-1 and is cURus approved; lead-free fuse, including the fusing element; resistance to soldering heat is 260°C/10 s according to IEC 60068-2-58 and 260°C/30 s according to Mil-Std-202 method 210; operates from ­55°C to 90°C Under $0.20 each in 5000-piece lots; two to three weeks Schurter Electronic Components
(707) 636-3000
www.schurter.com
TRANSIENT VOLTAGE SUPPRESSOR ARRAYS
MSMF and MSMFxxC series
Come in SOT-553 and SOT-563 packages; measure 1.7 by 1.7 mm; protect against IEC 61000-4-2 (electrostatic discharge) and 61000-4-4 (electrical fast transient) transient environments; tested up to 25 kV of electrostatic discharge; up to six lines of protection; rated for 100 W peak plse power for 8/20-µs waveshape with typical leakage currents of 5 µA or less $0.24 for the MSMF and $0.25 for the MSMFxxC in 10,000-unit lots; samples available now ProTek Devices
(602) 431-8101
www.protekdevices.com
TRANSIENT VOLTAGE SUPPRESSORS
MicroClamp family
µClamp 0504A protects up to four unidirectional lines; 0505A protects up to five unidirectional or four bidirectional lines; 0506A protects up to five bdirectional lines; each measures 1.7 by 1.7 by 0.6 mm in a six-lead SC-89 (SOT-666) package; each offers electrostatic-discharge protection in excess of ±8-kV contact, ±15-kV air per IEC 61000-4-2 level 4 requirements; for use on 5-V lines µClamp 0504A is $0.25, 0505A is $0.26, and 0506A is $0.28, all in 1000-unit lots; available now Semtech Corp.
(805) 498-2111
www.semtech.com
RESETTABLE FUSES
Polyfuse HVR600 series
Resettable and blow-type fuses protect against power crosses and lightning strikes; provide overcurrent protection for Telcordia GR-1089, UL 60950, and EIA-IS-968 requirements; based on ceramic positive-temperature-coefficient materials; can withstand a maximum power-cross condition of 600 V ac and operate continuously at voltages up to 60 V dc Start at $0.25 in OEM quantities; four to eight weeks Wickmann USA Inc.
(800) 553-7894
www.wickmannusa.com
DIODE ARRAY
GCDA15C-1
15-V operating voltage; 5-pF typical capacitance; 100-µA maximum reverse leakage current; 21-V maximum clamping voltage; electrostatic-discharge protection meets IEC 61000-4-2 level 4 specs; measures 1.25 by 2.85 by 1.1 mm; high-temperature soldering guaranteed to 260°C/10 s at terminals; operates from ­40°C to 125°C $30/100 pieces in 100,000-piece quantities; six to eight weeks
$0.68 in 1000- to 5000-unit lots; available now
Vishay Intertechnology
(619) 336-0860
www.vishay.com
FLIP CHIP ARRAYLX7207 Eliminates up to 50 discrete components used to protect LCD interfaces from electromagnetic fields and electrostatic discharges; measures 2.5 by 2.5 by 0.65 mm; five-by-five array; filter response characterized up to 6 GHz, with greater than 30-dB attenuation from 800 to 1000 MHz and 20-dB attenuation in common wireless local-area network frequencies of 2.4 GHz and 5.0 to 6.0 GHz $0.68 in 1000-to-5000-unit lots; available now Microsemi Corp.
(800) 713-4113
www.microsemi.com
THERMAL CIRCUIT BREAKER
1610 series
Fully interchangeable with plug-in blade-type fuses for fuse blocks in vehicles with 12- or 24-V electrical systems; color coding scheme corresponds with colors of blade fuses that comply with DIN 72581 and SAE J1284 standards; available in 6- to 30-A current ratings up to 32 V dc; optional manual release feature Around $6 in 500- to 1000-unit volumes; from stock E-T-A Circuit Breakers
(800) 462-9979
www.e-t-a.com
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