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Product Detailed Parameters
- Description：PTC RESET FUSE 18V 700MA RADIAL
- Series：YQ
- Mfr：Amphenol Advanced Sensors (Thermometrics)
- Package：Bulk
- Type：Ceramic
- Voltage - Max：18V
- Current - Hold (Ih) (Max)：700 mA
- Current - Trip (It)：1.4 A
- Current - Max：4.3 A
- Time to Trip：-
- Resistance - Initial (Ri) (Min)：-
- Resistance - Post Trip (R1) (Max)：-
- Resistance - 25°C (Typ)：1.2 Ohms
- Operating Temperature：0°C ~ 60°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.433" Dia x 0.157" T (11.00mm x 4.00mm)
- Height - Seated (Max)：-
- Thickness (Max)：-
- Lead Spacing：0.236" (6.00mm)
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Overview
The YQZ120N1.20 is a PTC disc thermistor manufactured by Amphenol Advanced Sensors under the Thermometrics brand. It features a nominal resistance of 1.2 ohms with a tolerance of ±25%. The component utilizes tin-coated copper lead wires for connection. It is designed for through-hole mounting and operates within a temperature range of -40°C to +125°C. The device serves as a resettable fuse or current-limiting element in electronic circuits.
Feature Summary
- Positive temperature coefficient characteristic enables automatic current limiting upon overheating
- Resettable functionality restores normal operation after fault conditions clear
- Tin-coated copper leads provide reliable solderability and electrical conductivity
Applications
- Overcurrent protection in DC power supply inputs
- Battery pack thermal management and safety circuits
- Motor drive current limiting applications
Procurement Notes
Verify the specific resistance value and switch temperature against the official datasheet before integration. Confirm that the lead wire configuration matches the PCB layout requirements. Ensure the operating temperature range covers the intended environmental conditions. Check for RoHS compliance status if required by project specifications.
Selection Notes
Select this component when a self-resetting overcurrent protection mechanism is required. Compare the holding current and trip current ratings against the circuit's maximum load. Consider the physical size constraints due to the disc form factor. Evaluate the thermal coupling to ensure accurate temperature sensing relative to the protected component.
Part Context
This part belongs to the YQ series of PTC thermistors from Amphenol Advanced Sensors. The series offers various resistance values and switch temperatures for different current rating needs. These components are widely used in consumer electronics and industrial equipment for passive circuit protection without manual intervention.
Replacement Considerations
Substitute parts must match the 1.2-ohm resistance, ±25% tolerance, and 120°C switch temperature. Verify identical lead material and length specifications. Ensure the replacement maintains the same package dimensions and mounting style for mechanical compatibility.
