1.800.554.4784 | www.thermistor.
com
For over 30 years, Defense and
Space subcontractors have relied
upon Quality Thermistors’ components
in their most critical applications.
2108 Century Way | Boise, ID 83709
A major aerospace
company has
awarded Quality
Thermistor a 100% quality
rating for 2007 for both quality
and on-time delivery stating:
“You have achieved a rating
of 100% for both quality and
delivery for 2007, an exceptional
accomplishment which only the
best of the best have realized.”
Quality Thermistor's test laboratory can Testing Capabilities: Test Conditions:
perform a wide range of testing
services. Quality Thermistor is » Power Burn-In » Environmental: 150mTorr to 150 PSI
» Temperature Cycling » -180°C to 1400°C up to 100% Relative Humidity
ISO:9001:2001 and AS9100 certified » Moisture Resistance » DC Power: 0 to 6000 volts
and can perform testing and screening » Shock and Vibration » 0 to 100 amps
to the following specifications: » Temperature Characteristics » Visual Inspection: 0x to 100x optical
» Space Level Testing » Digital image capture
» MIL-PRF-23648/ » QCI Military Requirements » Shock/Vibration: 30g to 1500g 75 Hz to 2000 Hz
» MIL-PRF-32192/1, /2, /3, /4 and /5 » Cryo-Chamber Conditioning » Wire bond pull: 0g to 100g
» MIL-STD-202 » Wafer Evaluation » Die shear: 0g to 10 Kg
» MIL-STD-883 » Die Shear » Solderability: to appropriate MIL. Spec’s.
» GSFC S311-P827 » Wire Bonding/Evaluation Sectioning » Density: .001 to 61 g/cm
» Customer Source Control Drawings » Dye penetrant
» Many others, call for details
PHOTO: NASA
E N G I N E E R I N G N E W S
in detail: Design Engineers for high-reliability military and aerospace markets are faced with chal-
lenges when given the assignment of redesigning legacy applications which have a high count of radial and
axial leaded passive components, or generating a new design which needs to incorporate a high percentage of
surface mount passive components. Quality Thermistors’ high reliability surface mount thermistors are manu-
factured to meet or exceed the MIL-PRF-32192 military specification, as well as the newly introduced NASA-
GSFC S-311-P-827 specifications.
The Defense Supply Center Columbus (DSCC) New GSFC approved thermistor specification
introduced a new surface mount thermistor specifica- being released Q1 2008. S-311-P-827 gives the Aero-
tion in November of 2006. MIL-PRF-32192 now gives space engineers a cost-effective option and more.
the design Engineer fully qualified DSCC options for two
PTC and three NTC surface mount package styles. As the Aerospace market continues to thrive and grow; the
push for smaller, lighter, more accurate and reliable parts
MIL-PRF-32192/1 intensifies. While the new DSCC MIL-PRF-32192 Specifica-
Bare PTC thermistor die available in resistance values from tion is sufficient for Defense/Military requirements, the
10 ohms to 10,000 ohms. This specification should be Aerospace community requires additional screening to
considered in new designs and for legacy designs which qualify parts for space flight.
used either MIL-PRF-23648/9 or MIL-PRF-23648/19.
Many customers have chosen to create their own SCD’s that
MIL-PRF-32192/2 incorporated all or part of the M32192 specification but also
Basic EIA 0805 PTC surface mount package available in added additional 100% screening requirements. This
resistance values from 22 ohms to 5,600 ohms. This specifi- escalates customer costs internally and increases the unit
cation should be considered for new designs as well as an cost due to a lack of standardization.
alternative to MIL- PRF-23648/9 and MIL-PRF-23648/19.
To meet the demands of our Aerospace customers and help
MIL-PRF-32192/3 “standardize” the aerospace test regimen, Quality thermistor
Bare NTC thermistor die available in resistance values from engineers worked jointly with engineers as NASA/GSFC to
15 ohms to 20 Mega ohms. This is ideal for new board create a GSFC approved SMD thermistor specification. This
designs which contain other bare die, wire bondable new specification, S-311-P-827, incorporates PTC
components could easily integrate this part style. This thermistors(both EIA 0805 and hybrid 0303 die) and NTC
specification should be considered for legacy replacements thermistors (EIA 0805). All devices procured to this specifi-
which used either MIL- PRF-23648/1 or MIL- PRF- cation will meet the requirements for Level I classification
23648/20. per EEE-INST-002.
MIl-PRF-32192/4 There are two NTC thermistors currently listed in the specifi-
Basic EIA 0805 NTC surface mount package. Any new high cation. These parts are available in “interchangeable”
reliability application PCB design can take advantage of this tolerances of either ±0.5C or ±1.0C over the range of 0c to
part style. This specification should be considered for new 70C. The PTC thermistors are all available in 1% or 2%
designs as well as an alternative to MIL-PRF-23648/1 and tolerances at the reference temperature of 25C. Qualifica-
MIL-PRF-23648/20. tions are now underway for the PTC 0805 with the hybrid
0303 and both NTC 0805’s soon to follow.
MIl-PRF-32192/5
Basic EIA 1206 NTC surface mount package. Any new high For more information, contact the engineering staff at
reliability application PCB design can take advantage of this Quality Thermistor, or see the link below for the complete
part style. This specification should be considered for new specification on the NASA NEPP website: nepp.nasa.gov.
designs as well as an alternative to MIL- PRF-23648/1 and
MIL- PRF-23648/20.
Quality Thermistor, Inc. | www.thermistor.com | 2108 Century Way - Boise, Idaho 83709 | 1.800.554.4784
