Surface Mount PTC Thermistors
The QT0805 Surface Mount PTC Thermistors are the ideal solution for temperature compensation networks. The patented design features Leach Guard terminations which are able to withstand many of today's modern automated assembly and soldering processes. Standard EIA sizing allows for tape and reel packaging designed for automated placement equipment. Contact Sequoia Technology for information regarding our SMD engineering kit

• Positive Temperature Coefficient: .7%/°C
• Thermal Time Constant: 30 seconds max in still air
• *Dissipation Constant: 2.5 mW/°C min in still air
• *Power Rating: .250 W at 25°C, derate to 0 W at 125°C
• Resistance @25°C: 22 ohm to 36K ohmOperating temperature range: -55°C to 100°C
• Storage temperature range: -65°C to 150°C
• *Thermal Time Constant and Dissipation Constant may vary depending on mounting

PTC Hybrid Microelectronics Chip Thermistors
PTC Silicon Die thermistors are used in wire-bonding and specialized reflow-soldering applications.

Board attachment by either wire bonding, conductive epoxy, or a combination of both may be used. Solder attachment may be performed using different solder configurations, however, it is not recommended.

• Positive Temperature Coefficient: .7%/°C
• Thermal Time Constant: 8 seconds max in still air
• *Dissipation Constant: 2 mW/°C min in still air
• *Power Rating: .0625 W at 25°C, derate to 0 W at 125°C
• Resistance @25°C: 10 ohm to 10K ohm
• Operating temperature range: -55°C to 125°C
• Storage temperature range: -65°C to 150°C
• *Thermal Time Constant and Dissipation Constant may vary depending on mounting
• Max Dimensions: .038 x .038 x .072 +/-.010. See individual drawing for actual part dimensions
• RoHS Compliant

Military Grade PTC Chip Thermistor, MIL-PRF-32192/1
The High-Rel M32192/1 Positive Temperature Coefficient chip thermistor is designed for wire bonding applications found in hybrid circuitry. The devices exhibit a linear Resistance vs. Temperature curve approximating 0.7%/C which make them the ideal solution for temperature compensation applications.

DSCC (Defense Supply Center, Columbus) issued specification MIL-PRF-32192/1 in the Summer of 2005 which dictates the performance and inspection requirements for these devices which includes a test for wire bonding integrity. Many leading Aerospace companies around the world have selected these components for their mission critical space flight applications.

• Positive Temperature Coefficient: .7%/°C
• Thermal Time Constant: 30 seconds max in still air
• *Dissipation Constant: 2.5 mW/°C min in still air
• *Power Rating: .125 W at 25°C, derate to 0 W at 125°C Resistance @25°C: 10 ohm to 10K ohm
• Operating temperature range: -55°C to 125°C
• Storage temperature range: -65°C to 150°C
• *Thermal Time Constant and Dissipation Constant may vary depending on mounting.
• Max Dimensions: .038 x .038 x .072 +/-.010. See individual drawing for actual part dimensions

Military Grade PTC Surface Mount Thermistor, MIL-PRF-32192/2
M32192/2 PTC Surface Mount Thermistors exhibit a stable, proportional and resistance vs. temperature signal approximating 0.7%/C.

DSCC (Defense Supply Center, Columbus) issued specification MIL-PRF-32192 in 2005 which dictates the performance and inspection requirements for these Thermistors. Many leading Aerospace companies around the world have selected these components for their mission critical applications.

• Thermal Time Constant: 30 seconds max in still air
• *Dissipation Constant: 2.5 mW/°C min in still air
• *Power Rating: .250 W at 25°C, derate to 0 W at 125°C
• Resistance @25°C: 22 ohm to 5620 ohm
• Operating temperature range: -55°C to 125°C
• Storage temperature range: -65°C to 150°C
• *Thermal Time Constant and Dissipation Constant may vary depending on mounting

PTC Hybrid Mount Microelectronic SMT's
PTC Microelectronic Surface Mount Thermistors are the solution where hybrid mounting is a must. The 5-sided wrap-around terminations allow reliable mounting using conventional conductive epoxy onto various substrates. Substrates such as alumina as well as standard PC Board material work well with the QTCH series PTC Thermistor. Solder attachment is NOT recommended.

• Positive Temperature Coefficient: .7%/°C
• Thermal Time Constant:
• *Dissipation Constant:
• *Power Rating: .0625 W at 25°C, derate to 0 W at 125°C
• Resistance @25°C: 3300 ohm to 10K ohm
• Operating temperature range: -55°C to 125°C
• Storage temperature range: -65°C to 150°C
• *Thermal Time Constant and Dissipation Constant may vary depending on mounting
• Max Dimensions: .030 x .030 x .050 +/-.010. See individual drawing for actual part dimensions
• RoHS Compliant