Interchangeable Radial Leaded NTC Thermistor
The QTI interchangeable NTC thermistor offer industry standard 3" long, #32 Awg. (.0075") bare leads. The designation name “interchangeable” is given to thermistors which have ultra-tight tolerances guaranteed to track a specific resistance-temperature curve.

• Thermal Time Constant: 8 seconds max in still air
• Dissipation Constant: 2 mW/°C min in still air
• Power Rating: .25 W at 25°C, derate to 0 W at 125°C
• Resistance @25°C: 2252 ohm to 100K ohm
• Operating temperature range: -55°C to 125°C
• Storage temperature range: -65°C to 150°C
• RoHS Compliant

Military Grade NTC thermistors, MIL-PRF-23648/20
MIL-PRF-23648/20 specified NTC Thermistor, meeting or exceeding all the requirements of MIL-PRF-23648. Certified by the Department of Defense, Defense Supply Center Columbus, Qualified Products List QPL-23648

• Thermal Time Constant: seconds max in still air
• Dissipation Constant: mW/°C min in still air
• Power Rating: W at 25°C, derate to 0 W at 125°C
• Resistance @25°C:
• Operating temperature range: -55°C to 125°C
• Storage temperature range: -65°C to 150°C

Interchangeable Radial Leaded NTC Thermistor, Insulated Leads
The QTI interchangeable NTC thermistor with insulated leads is a proven design for precision temperature measurement. QTI’s Industry Standard Curve-Tracker The designation name "interchangeable" is given to thermistors, which have ultra-tight tolerances, guaranteed to track a specific resistance-temperature curve.

• Thermal Time Constant: 8 seconds max in still air
• Dissipation Constant: 2 mW/°C min in still air
• Power Rating: .25 W at 25°C, derate to 0 W at 125°C
• Resistance @25°C: 2252 ohm to 100K ohm
• Operating temperature range: -55°C to 125°C
• Storage temperature range: -65°C to 150°C
• RoHS Compliant

Miniature Interchangeable Radial Leaded NTC Thermistor, Insulated Lead
Quality Thermistor’s miniature NTC thermistors feature a small .038” maximum bead diameter providing an extremely fast thermal time response. The QTMB Mini Bead NTC Thermistor is an extension of the QTI Interchangeable series for applications that require interchangeability in a smaller size. The small .038” bead diameter provides an extremely fast thermal time response. Standard 6” long #34 AWG insulated leads enable direct placement into probe housings or remote temperature sensing where space is limited.

• Thermal Time Constant: 1 second max in still air
• Dissipation Constant: 1 mW/°C min in still air
• Power Rating: .0625 W at 25°C, derate to 0 W at 125°C
• Resistance @25°C: 10K ohm and 15K ohm
• Operating temperature range: -55°C to 125°C
• Storage temperature range: -65°C to 150°C

Radial Leaded NTC Thermistor, Bare Leads
Quality Thermistor’s bare leaded NTC thermistors are the ideal solution for low cost temperature measurement between the range of –55°C to +150°C. Their small size allows for PC board mounting as well as for potting into enclosures.

• Thermal Time Constant: 8 seconds max in still air
• Dissipation Constant: 2 mW/°C min in still air
• Power Rating: .25 W at 25°C, derate to 0 W at 125°C
• Resistance @25°C: 100 ohm to 9.8 meg ohm
• Operating temperature range: -55°C to 125°C
• Storage temperature range: -65°C to 150°C

Radial Leaded NTC Thermistor, Insulated Leads
NTC thermistors with insulated leads provide a hassle free solution for potting into enclosures. Insulated leads can also provide a “built in” circuit board standoff for airflow measurement.

• Thermal Time Constant: 8 seconds max in still air
• Dissipation Constant: 2 mW/°C min in still air
• Power Rating: .25 W at 25°C, derate to 0 W at 125°C
• Resistance @25°C: 100 ohm to 9.8 meg ohm
• Operating temperature range: -55°C to 125°C
• Storage temperature range: -65°C to 150°C
• RoHS Compliant

High Temperature NTC Thermistor
Quality Thermistor’s high Temperature NTC Thermistors are ideal where measurements must be made at elevated temperatures. Constructed with materials designed for high temperature operation, they have exceptional time response and durability at elevated temperatures. The QTHT series is competitively priced to glass bead thermistors. With more rugged construction than glass beads. QTHT-1 leads can be soldered or welded. Use up to 200°C continuous, and intermittent use to 250°C is specified.

• Thermal Time Constant: 8 seconds max in still air
• Dissipation Constant: 2 mW/°C min in still air
• Power Rating: .25 W at 25°C, derate to 0 W at 125°C
• Resistance @150°C: 10K ohm
• Operating temperature range: -55°C to 250°C intermittent
• Storage temperature range: -65°C to 250°C

Glass-Bead Radial Leaded NTC Thermistor
Quality Thermistor glass-bead NTC thermistors are designed for high-stability applications where reliability, repeatability, and/or high moisture resistance are crucial. These QTGB series thermistors are designed for the harshest of environments, and virtually eliminate the concern of moisture related failure. The QTGB series is one of very few interchangeable offerings in the industry with up to +/-.1°C accuracy. The QTI glass-bead interchangeable thermistor has an ultra-tight tolerance guaranteed to track the specified resistance/temperature curve. Internal Quality Conformance Inspection testing ensures that these QTGB thermistors will meet or exceed the stringent requirements of qualification testing per MIL-PRF-23648.

• Thermal Time Constant: 20 seconds max in still air
• Dissipation Constant: .625 mW/°C min in still air
• Power Rating: W at 25°C, derate to 0 W at 125°C
• Resistance @25°C: 5000 ohm and 10000 ohm
• Operating temperature range: -55°C to 300°C
• Storage temperature range: -65°C to 350°C
• RoHS Compliant