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Specifications
Pitch:
7.5mm
Operating Temperature:
-40℃~+175℃
Mfr. Part #:
NTC 3D-11
Package:
Through Hole,P=7.5mm
Key Attributes
Model Number:
NTC 3D-11
Product Description
Product Overview
This document details the specifications for the NTC 3D-11/P=7.5 internal bend lead thermistor, a negative temperature coefficient (NTC) thermistor designed for various applications. It provides comprehensive technical parameters, experimental methods, testing equipment, and performance requirements.
Product Attributes
- Brand: (Cheng Xi)
- Origin: Dongguan City, China
- Model: 3D-11
- Coating Color: Black
- Wrapper Material: Modified phenolic resin
- Lead Material: CP Wire
Technical Specifications
| Model | Size (mm) (D x H x W x d) | Zero Power Resistance at 25 () | B Value (K) | Thermal Time Constant (S) | Thermal Dissipation Constant (mW/) | Operating Temperature () | Max Steady State Current (A) |
|---|---|---|---|---|---|---|---|
| 3D-11 | Max12.0 x Max14.0 x 7.5+0.5 x 0.65+0.1 | 3 20% | 2700 | 43 | 13 | -40 to +175 | 5 |
Detailed Technical Parameters
| Parameter | Experiment Method | Test Equipment | Requirements |
|---|---|---|---|
| NTC Thermistor Technical Terms | |||
| Rated Zero Power Resistance | Zero power resistance measured at a reference temperature of 25. Zero power resistance RT is measured at a specified temperature using a measurement power that is negligible relative to the total measurement error. | HG-2515 Thermistor Tester | Resistance measurement within allowable deviation: M: 20%; L: 15%; K: 10%; J: 5% |
| B Value (K) | The thermal index of an NTC thermistor, defined as the ratio of the difference in natural logarithms of zero-power resistances at two temperatures to the difference in the reciprocals of those temperatures. B=[ln(RT1)- ln(RT2)]/(1/T1-1/T2) where T1 = 273.15+25() and T2 = 273.15+50 / 85(). | HG-2515 Thermistor Tester, Constant Temperature Oil Bath | Complies with datasheet requirements |
| Dissipation Coefficient () | At a specified ambient temperature, the dissipation coefficient of an NTC thermistor is the ratio of the change in power dissipated by the resistor body to the corresponding change in temperature of the resistor body, i.e., =P/T. Within the operating temperature range, varies with ambient temperature. | Dissipation Coefficient Tester | See Main Technical Parameters Table |
| Thermal Time Constant () | Under zero-power conditions, the time required for the temperature of the thermistor body to change to 63.2% of the difference between the initial and final temperatures when the temperature changes abruptly. The thermal time constant is proportional to the thermal capacity C of the NTC thermistor and inversely proportional to its dissipation coefficient , i.e., =C/. | Thermal Time Constant Tester | See Main Technical Parameters Table |
| Resistance-Temperature Characteristic (R-T) | R-T relationship diagram. | / | / |
| Static Volt-Ampere Characteristic | Refers to the relationship between voltage and current after the NTC thermistor has reached thermal equilibrium. Due to the large variation in the relationship between the terminal voltage and current of a thermistor, its volt-ampere characteristic curve is often represented on a double logarithmic scale. | / | / |
| Residual Resistance | Resistance value when the maximum DC current is applied through the thermistor and thermal equilibrium is reached under standard test conditions. | Steady State Current Test Machine | See Main Technical Parameters Table |
| Maximum Allowable Capacity | Under load conditions, the maximum allowable capacitance value of a capacitor connected to a thermistor. | Maximum Allowable Capacity Test Machine | Zero power resistance change rate 25% |
| Maximum Steady State Current | The maximum continuous DC current that can be applied to the thermistor at an ambient temperature of 25. | Maximum Steady State Current Test Machine | Appearance without damage, resistance change rate 25% |
| NTC Thermistor Process Performance ~ Mechanical Performance | |||
| Solderability | Dip the thermistor leads into molten tin at 2605 for 2 0.5s, then remove and observe the appearance. | Tin Pot | Uniform tinning on the lead-out end, with over 90% immersion area, and defects not concentrated in one spot. |
| Resistance to Soldering Heat | Dip the thermistor leads into molten tin at 26010. Immersion depth is 2.0mm+0/-0.5mm from the base plane, with an insulating layer of 1.50.2mm, maintained for 50.5s. Recovery time is 1 hour to 2 hours. | Tin Pot | Zero power resistance change rate 25% |
| Lead Strength | Apply the following load to one of the thermistor leads for 10 seconds: Lead diameter (mm): 0.6, 0.8, 1.0; Load (N): 10, 10, 20. Bend the other lead 90 degrees, restore, and then bend 90 degrees in the opposite direction, restore. | HG-2515 Thermistor Tester | No visible damage to appearance, zero power resistance change rate 25% |
| Vibration | Fix the thermistor on a vibration table. Use frequencies from 10Hz to 500Hz with an amplitude of 0.75mm for 6 hours, then observe the appearance. | Vibration Table | No visible damage to appearance, clear marking, zero power resistance change rate 25% |
| Shock | Fix the thermistor on a shock table and subject it to 400010 shocks with an acceleration of 390m/s, then observe the appearance. | Shock Table | No visible damage to appearance, clear marking, zero power resistance change rate 25% |
| Rapid Temperature Change | 1. TA = lower category temperature for 30min. 2. Transition time 5 min. 3. TB = upper category temperature for 30min. 4. Room temperature for 5 min. This constitutes one cycle. Perform 5 cycles. Recover for over 4 hours. | High and Low Temperature Test Chamber, HG-2515 Thermistor Tester | No visible mechanical damage to appearance, clear marking, zero power resistance change rate 25% |
| Climatic Sequence | 1. Dry Heat: IEC68-2-2 Test Ba, 16 hours. 2. Cyclic Damp Heat: IEC68-2-30 Test Db, 55, 24 hours per cycle. 3. Cold: -403, 2 hours. 4. Low Pressure: IEC68-2-13 Test M, test temperature between 15 and 35, duration 1h. 5. Alternating Damp Heat: IEC68230 Test Db, remaining cycles. After removal, place at room temperature for over 1 hour, measure zero power resistance within 24 hours. | High and Low Temperature Test Chamber, HG-2515 Thermistor Tester | No visible mechanical damage to appearance, clear marking, zero power resistance change rate 25% |
| Steady State Damp Heat | Place the thermistor in a test chamber at 402 and 90-95% RH for 21 days. After removal, recover for over 4 hours and measure zero power resistance. Compare the zero power resistance change before and after the test. | Test Chamber / HG-2515 Thermistor Tester | No visible mechanical damage to appearance, clear marking, zero power resistance change rate 25% |
| Upper Category Temperature Endurance | Measure and record the initial zero power resistance. Place the thermistor in a test chamber at the upper category temperature for 1000h. After removal from the test chamber, recover for over 4h and measure the zero power resistance. | Constant Temperature Test Chamber, HG-2515 Thermistor Tester | No visible mechanical damage to appearance, clear marking, zero power resistance change rate 25% |
2411151454_DGCX-NTC-3D-11_C42383217.pdf
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