UPDATE.MAY–Cooling Devices–SC
Product Update: Cooling Devices
Cooling devices are becoming more important as today's electronic
equipment packs in more density and runs at faster speeds. Here's a look
at some of the latest fans, blowers, heat sinks, and heat exchangers, and
related accessories
Color Photo
Cooling assembly cools microprocessors
Designed to cool microprocessors such as the Intel 486, the Series 350
cooling assembly consists of a 40-mm2 , 12-Vdc fan mounted to a
black anodized finned heat sink. Total assembly height is 0.73 in. The
assembly limits the chip case's temperature rise to 1.6 to 1.8
°C/W. It is available with a ball-bearing fan rated 4.6 cfm or a
sleeve-bearing fan rated 7 cfm. Other options include custom termination
on standard wire leads, and thermally conductive mounting tape. (With
sleeve-bearing fan, $10.65 ea/50–stock.) Calmark Corp., San Gabriel, CA
R.L. Rosenthal 818-287-0451 Fax 818-287-7350
Clip-on heat sinks cool TO-220 packages
Four heat sinks, the 7136D, 7137D, 7139D, and 7140D, accommodate TO-220
packages. The 7136D and 7137D are designed to mount vertically on the pc
board. They measure 0.840 (H) x 0.520 (W) x 0.510 (D) in. and 0.840 (H) x
0.900 (W) x 0.375 (D) in., respectively. Both have lock-in tabs to prevent
the device from dislodging. The 7139D and 7140D are for horizontal
mounting. They measure 0.510 (H) x 0.520 (W) x 0.780 (D) in. and 0.375 (H)
x 0.900 (W) x 0.700 (D) in., respectively. All of the heat sinks are made of
tin-plated copper. (7139D, $0.24 ea/500–stock.) Thermalloy, Inc.,
Dallas, TX David Barnes 214-243-4321, ext. 250 Fax 214-241-4656 EEM
FILE 2600
Air conditioner fits in narrow spaces
The latest addition to the company's line of TrimLine Narrow-Panel air
conditioners is 12 (W) x 33 (H) in. The NP33 has a built-in condensate
evaporator, thermostat, and EMI surge suppression filter. The cooling
capacity ranges from 2,000 to 5,000 BTU/hr for air-cooled models and 2,000
to 6,000 BTU/hr for water-cooled models. The air conditioner also comes
with the company's mounting template and assembly bracket. (price-avail.)
Kooltronic, Inc., Hopewell, NJ Nancy Brenfleck 800-321-KOOL; in NJ,
609-466-3400, ext. 217 Fax 609-466-1114
Dc fans come in choice of sizes
KD series miniature dc fans come in sizes from 25 x 10 mm to 120 x 38 mm.
They have a redesigned stator and single coil design that lowers noise by
6 dBA over competitive fans. Cooling capacities range from 1.5 to 120 cfm.
(80 x 25-mm fan, from $3.50 ea/prod qty–stock to 10 weeks.) Electric
Motor Engineering Mission Viejo, CA Frank Buday 714-583-9802 Fax
714-583-9785
Thermoelectric cooler covers diverse cooling needs
The Frigichip FC0.65 Series thermoelectric cooling device is rated 2 A
and is available with 4 to 66 thermocouples to meet a wide range of
cooling requirements. Heat pump ratings range from 0.54 to 8.89 W. The
cooler is available in a choice of configurations and mounting arrangements.
($35 ea/1,000–2 to 6 weeks ARO.) Melcor, Trenton, NJ Milton Levine
609-393-4178 Fax 609-393-9461
The FanPack is a 19-in. rack-mountable fan tray with three five-blade
fans. The tray stands just 1U high, leaving room for other instruments.
Two switched 115-Vac outlets on the rear are unfused for flexible use. The
fans provide a cooling capacity of 210 cfm and operate quietly. They are
UL, CSA, and VDE approved. (FanPack, $250–stock.) Matrix Corp., Raleigh,
NC Stephen Beer 800-848-2330; in NC, 919-231-8000 Fax 919-231-8001 EEM
FILE 2600
Cooling assembly for CPUs
A heat sink/fan assembly reduces the heat generated by a computer's CPU.
It measures 1 7/8 x 1 7/8 x 11/16 in. and produces 5 cfm. The power
consumption is 0.8 W, and the operating voltage range is 10.2 to 13.6 Vdc.
The easy-to-install cooling assembly comes in a UL 94V-0 rated,
thermoplastic housing. ($29–stock.) InterLogic Industries Melville, NY
Bert Freifeld 516-420-8111 Fax 516-420-8007
Air conditioner allows programmable operation
The ProAir CR43 enclosure air conditioner has a cooling capacity of 8,500
BTU/h at an ambient temperature of 131 °F (55 °C). It is
available with a programmable control for simpler operation. The air
conditioner can be door, side, or front mounted. The unit's front cover
hinges open for easy access to all components. Blowers can be easily
replaced. The air conditioner measures 43.31 (H) x 15.75 (W) x 10.25 (D)
in. It is available in 115-V, 50/60-Hz; 115-V, 60-Hz; 230-V, 50-Hz; and
230-V, 60-Hz versions. ($1,600–stock.) McLean Midwest A Subsidiary of
Zero Corp. Brooklyn Park, MN Denise Didier 612-561-9400 Fax
612-569-0533
40-mm fan meets spot-cooling needs
A miniature fan generates 8 cfm for cooling of hot spots on pc boards. It
measures 40 (Dia) x 15 (H) mm and weighs just 20 g. The fan operates on 12
Vdc and has a ball-bearing design for quiet operation. ($11 ea/prod
qty–stock.) NMB Technologies Inc. Chatsworth, CA Myron Jones
818-341-3355
Fans come in choice of sizes
The 12-V series KDA and 24-V series KDB fans come in sizes from 25 x 10
to 120 x 38 mm. Capacities range from 1.3 to 110 cfm, depending on the
model. The fans have a sleeve-bearing design and run for up to 50,000
hours at 25 °C. A ball-bearing design is available for some models.
(About $5 ea/small qty–stock.) Indek Corp., San Jose, CA Information
408-432-1199 Fax 408-433-9330
Heat exchanger cools circuit cards
A compact heat exchanger measures 9 x 6.8 x 6.8 in. and is designed to
cool an array of circuit cards. It has inlet and outlet connections to
circulate air or liquid. It is extruded of aluminum and has grooves on the
top and bottom of the chassis to direct heat away from the cards. The heat
exchanger dissipates 180 W. ($1,500 ea/prod qty–5 to 6 weeks ARO.) Lytron
Inc., Woburn, MA Dan DeFreitais 617-933-7300 Fax 617-935-4529
2600
Thermoelectric cooler generates up to 20 W
A self-contained thermoelectric cooling assembly provides up to 20 W and
uses no chlorofluorocarbons. It achieves provides a maximum temperature
difference of 41 °F below ambient in air-to-air, air-to-water, or
cool plate-to-air use. The assembly is available as the model DA-020 (for
cold-plate cooling), or as the model AA-020 (for cooling small
enclosures). Operating voltages range from 5 to 24 Vdc. Power requirements
are 12 Vdc at 3 A for both units. (Model DA-020, $105 ea/1,000; model
AA-020, $120 ea/1,000–stock.) Cool Corp., Minneapolis, MN William
Mielenz 612-559-3117 Fax 612-559-9679
Heat-dissipating assembly has efficient design
The maxiTHERM-HD heat-dissipating assembly is constructed of aluminum
fins epoxied to an extended heat spreader. Compared to the usual aluminum
extruded heat sink that typically achieves a fin density ratio of 6:1,
this assembly can achieve a ratio of as much as 25:1. The epoxy interface
adds negligible thermal resistance, as overall thermal resistance is less
than 0.1 °C/W. The assembly is available in configurations for both
forced-air and natural-convection applications. (From $10 ea/prod qty–4
to 6 weeks ARO.) Ahamtor Inc., Temecula, CA Mike Glover 800-367-7688;
in CA, 714-676-4151 Fax 714-676-3031
Heat sink holds Intel, Motorola processors
A heat sink for the Intel 80486 and Motorola 68040 microprocessors is
available in six models, all offered with nonconductive attachment clips
for fast assembly. The heat sink is available in straight-fin and pin-fin
configurations with heights of 0.25, 0.35, or 0.60 in. (Typical sink for
Intel 80486, $1.05 ea/1,000–stock.) Aavid Engineering, Inc. Laconia,
NH Gary Kuzmin 603-528-3400 Fax 603-528-1478
Heat sink and fan cools 486 processors
The FanSink is an integral fan and heat sink. It measures 45 mm2 x
12.5 mm high and is designed to cool Intel 486 microprocessors. The
assembly operates at 12 Vdc and has a cooling capacity of 1.5 °C/W.
It meets UL and CSA requirements. ($25 ea/sample qty–stock.) Nidec Corp.
, Canton, MA Charles Welsch 617-828-6126 Fax 617-838-3215
Thermally conductive material replaces grease
Adhesive-coated, thermally conductive material replaces grease in
applications that do not require electrical insulation. Q-Pad 3 consists
of graphite embedded in a polymer matrix that has an elastomer on one side
and a pressure-sensitive adhesive on other. The elastomer conforms to
surface textures, creating an air-tight interface between heat-generating
components and heat sinks. Thermal impedance is 0.1 °/in.
material is supplied as roll stock with the adhesive lightly adhered to a
release liner. (For TO-220 part, $0.27 ea/500–stock.) The Bergquist Co.
Minneapolis, MN Chris Hanson 800-347-4572; in MN, 612-835-2322 Fax
612-835-4156
Centrifugal blower for battery systems
A high-pressure centrifugal blower comes in four frame sizes with
capacities up to 19 cfm at zero pressure. Noise ratings range from 44 to
54 dBA. Standard operating voltages are 4.8, 6, and 7.2 V with other
voltages available on a custom basis. ($20 to $60 ea/small qty–4 to 6
weeks ARO.) Micronel U.S., Vista, CA Information 619-727-7400 FaxEEM
FILE 2600
Motorized impeller cools enclosures
A packaged motorized impeller is available in versions to produce 160 to
800 cfm and operate at two-, four-, and six-pole motor speeds. It is
available with a choice of finishes, wheel sizes, and mounting styles.
Construction is galvanized steel. Motors have sealed ball bearings and
carry UL, CSA, and VDE approvals. ($55 ea/1,000–stock.) McLean
Engineering A Div.of Zero Corp. Princeton Junction, NJ Craig Reed
609-799-0100 Fax 609-799-1081
Heat sinks hold Intel processor
The Penguin heat sinks come in three versions that hold various Intel
microprocessors. The 669 Series holds Intel 80486DX and 80486DX2
microprocessors. The 629 Series holds those same chips, but used with AMP
17 x 17 PGA LIF sockets. The 698 Series pin-fin heat sinks hold the
upcoming Pentium microprocessors as well as Hewlett-Packard PA RISC chips.
($1.30 to $2 per assembly/5,000–stock.) EG&G Wakefield Engineering
Wakefield, MA David Saums 617-245-5900 Fax 617-246-0874
Heat sink for Intel Pentium
A two-piece microprocessor dissipator is designed to cool Intel's Pentium
microprocessor as well as other standard 21 x 21 PGA packages. It has a
quick-connect clip and is available with a PGA spring tool to attach the
clip. No socket is needed. The heat dissipator is extruded of aluminum and
has a black anodized finish. It typically exhibits a thermal resistance of
1.2 to 2.9 °C/W at 400 lin ft/min. ($3.40 ea/100–stock.) IERC
Corp., Burbank, CA George Ollen 213-849-2481 Fax 818-848-8872
2600
Cooling module has circuit breaker
The model D-4118 cooling module now has a circuit breaker and an on/off
switch for added protection against overheating. It stands just 1U high
and can be specified with one to nine fans, each rated 105 cfm. The module
is easily installed in any 19-in. cabinet. ($129 each, depending on number
of fans–4 weeks ARO.) General Devices, Inc. Indianapolis, IN Michael
Knight 800-626-9484; in IN, 317-897-7000 Fax 317-898-2917
2600
Heat exchanger in six models
The Mini-Techline air-to-air heat exchanger comes in six models with
thermal capacities from 41.8 to 72 W/K. Dimensions range from 1,200 x 271
x 110 mm to 1,780 x 439 x 110 mm. Each heat exchanger operates on 230 V,
50/60 Hz, and comes with a power cord and slip-on connectors. The
operating temperature range is -5 ° to +55 °C. ($450 to $1,100,
depending on model.) Rittal Corp., Springfield, OH Hans Hoogendoorn
800-477-4000; in OH, 513-399-0500; Fax 513-390-5599
Dc fan meets tight space needs
A subminiature, brushless dc fan measures just 10 mm thick and is
available in sizes of 25, 40, 50, and 60 mm2 . The fan is available
in 5- or 12-Vdc ratings and can be equipped with a temperature sensor to
control fan speed. The fan has a rated life of 50,000 hours. (About $8
ea/1,000–stock to 8 weeks.) Evox/Rifa, Inc. Lincolnshire, IL Andrew
Bellavia Jr. 708-948-9511 Fax 708-948-9320
Tube-axial fans have rugged design
A line of brushless tube-axial cooling fans includes both ac and dc
models. Both types have ball-bearing designs for quiet operation and long
life in industrial or office environments. The model R87F/T ac-powered fan
comes in sizes of 80, 90, and 120 mm2 and in 25- or 38-mm widths.
The model R85F dc-powered fan comes in standard profile sizes of 40, 60,
and 80 mm2 in 20-mm widths. Also available are slim-profile models
measuring 80 mm2 x 15 mm deep, 62 mm2 x 15 mm deep, and 40
mm2 x 10 mm deep. (Ac fans, $28 to $37 each; dc fans, $16 to $20
each–stock.) Omron Electronics, Inc Schaumburg, IL Linda Cazan
708-843-7900 Fax 708-843-7787
Fan mounts in 19-in. rack
A fan tray is designed to mount in a 19-in. rack. It has a socket for power
cable connections, front panel with on/off switch and indicator lamp, fuse
and auxiliary power output connector. The fan tray measures 1.75 in. (1 U)
high and can be outfitted with three, six, nine, or twelve fans. Each fan
in the mount can have a rating of up to 77 cfm. (Three-fan unit, from
$180–stock.) Schroff Inc., Warwick, RI Gary McEldowney 800-451-8755;
in RI, 401-732-3770 Fax 401-738-2904
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