Component Specifier: Transformers And Inductors

TRANSFORMERS TYPE/Model ...

April 12, 2004

3 min read

TRANSFORMERS
TYPE/Model	Features	P & A	Source
CURRENT SENSE ACST-260	Low-profile current-sense transformer designed to monitor current in low-frequency applications monitors current up to 30 A at frequencies up to 200 Hz turns ratio is 1:500 primary to sense class B insulation system dielectric strength of 3 kV	Starts at $1.29 each in 1000-unit lots eight to 10 weeks	Zettler Magnetics Inc. www.zettlermagnetics.com (949) 360-5838
CURRENT SENSE CST5028 series	Surface-mount current-sense transformers for dc-dc converter applications low profile (0.280 in.) footprint is 0.495 in. by 0.575 in. pick and place header turns ratios of 1:1:50, 100, 200 15-A current rating 50- to 500-kHz frequency range	Starts at $0.81 each in 1000-unit lots stock to six weeks	Inductor Supply Inc. www.inductorsupply.com (800) 854-1881
TOROIDAL Custard	Custard (CUSTom/standARD) line of customizable general-purpose toroidal transformers based on the company's standard cores with primary windings and insulation in place power ratings range from 20 VA to 1000 VA standard primary windings for 117 V/230 V, 50- to 60-Hz operation secondary windings as specified by customer certified to UL, CSA, EN, and IEC standards class B insulation system	Example is $52.50 each in 100-unit quantities for 500-VA transformer with two secondary windings within 72 hours	Bridgeport Magnetics www.bridgeportmagnetics.com (800) 836-5920
BALUN FB650/FB850	Subminiature surface-mount femto balanced to unbalanced (balun) transformers designed for differential input and output locations on next-generation wireless chip sets 0.055-dB insertion loss (max) 2.4- to 2.5-GHz frequency (FB650) 4.8- to 5.9-GHz frequency (FB850)	Ranges from $0.10 to $0.20 each depending on volume stock	Anaren Inc. www.anaren.com (315) 432-8909
INDUCTORS
TYPE/Model	Features	P & A	Source
SMT CHIP GLTZ series	Series of extremely small surface-mount chip inductors inductance range of 1.0 nH to 27 nH in 17 models standard tolerance on inductance is ± 5% epoxy encapsulated 0.5 mm by 0.25 mm by 0.25 mm (0201 size) high Q at microwave frequencies	$0.092 each in 15,000-unit lots; 10 weeks	Sprague-Goodman Electronics www.spraguegoodman.com (516) 334-8700
MINIATURE SHIELDED HM66 series	Low-profile high-current shielded surface-mount inductors board-mounted profiles range from 1.8 to 4.0 mm rated for up to 10 A continuous current inductance values from 1 to 330 µH; dc resistance of 0.0081 O to 1.540 O ; - 25 ° C to 125 ° C operating temperature range	Typically $0.25 each in quantities of 25,000 stock to 10 weeks	BI Technologies Corp. www.bitechnologies.com (714) 447-2345
POWER CHOKE B82731T	Series of current-compensated power chokes double choke with ferrite EE core 250-V ac rated voltage 0.3- to 1.8-A rated current 3.3- to 100-mH rated inductance two-section winding used in switch-mode power supplies and electronic lamp ballasts	$0.60 each in 10,000-unit lots six weeks	Epcos Inc. www.epcos.com (800) 888-7728
POWER PG0137 series	Low-profile, surface-mount inductors for dc-dc converters 0.090- to 1.35-µH inductance value 3.2-mm maximum height footprint is 6.8 mm by 6.8 mm (industry standard 2525 footprint) current rating up to 18 A temperature range to 130 ° C	Starts at $0.29 each in 100,000-unit lots four to six weeks	Pulse Engineering Inc. www.pulseeng.com (858) 674-8100
HIGH CURRENT HC8	Family of high-current, surface-mount inductors 4.0-mm height 0.141- to 1.27-µ H inductance range 16- to 39-A current range frequency range up to 500 kHz designed for use in VRM circuits with high-speed switch-mode applications	Mid $0.70s stock to eight weeks	Cooper Electronic Technologies www.cooperet.com (561) 752-5000