Product Overview
The NTC 8D-15/P=7.5 is a power NTC thermistor designed for surge current suppression. It features a small size with high power handling, fast response, high reliability, and a long lifespan. The thermistor offers a large material constant (B value) and low residual resistance, operating across a wide temperature range. It is suitable for various applications including switch mode power supplies, adapters, LED drivers, electronic ballasts, motors, and filament protection in lighting devices.
Product Attributes
- Brand: (Chengxi Electronics)
- Origin: Dongguan, China
- Product Code: NTC 8D-15/P=7.5
- Encapsulation Material: Phenolic Resin
- Coating Color: Black
- Lead Material: CP Wire
Technical Specifications
| Model | Rated Zero-Power Resistance (R25) | Material Constant (B25/50) | Max. Steady State Current | Dissipation Constant | Thermal Time Constant | Operating Temperature Range | Dimensions (D x T x F) | Lead Diameter (d) |
|---|---|---|---|---|---|---|---|---|
| NTC 8D-15 | 8 20% | 2800 10% | 5 A | 16 mW/ | 90 s | -40 ~ 200 | 17.5mm x 6.0mm x 7.5mm | 0.75mm |
Mechanical Characteristics
| Item | Specification | Test Conditions/Methods |
|---|---|---|
| Solder-ability | Terminals uniformly tinned, area 95% | Dipping in 240-245 tin bath for 2-3s (6mm from body) |
| Resistance To Soldering Heat | No visible damage, R/RN 20% | Dipping in 2655 tin bath for 101s (6mm from body), recover 4-5h at 252 |
| Strength of lead terminal | No break out, R/RN 20% | IEC68-2-21 (GB2423.29) Ua/Ub: 10N pull (10s), 5N bend (90, 10s), 5N twist (180, 10s), recover 4-5h at 252 |
Electrical Characteristics
| Item | Specification | Test Conditions/Methods |
|---|---|---|
| Rated Zero-Power Resistance RN | 8 20% | Ambient temp. 251, Testing voltage: 1.5VDC, after 1-2h stabilization |
| Thermal Dissipation Constant | 16 mW/ | Calculated by change in power dissipation vs. change in temperature |
| Thermal Time Constant | 90 s | Time to reach 63.2% of ambient temp. change under zero power |
| Material Constant B | 2800 10% | B=T1T2/(T2-T1) Ln(R1/R2), T1=298.15K(25), T2=323.15K(50) |
| Max. Steady State Current | No visible mechanical damage, RN / RN 20% | Ambient temp. 252, Test Current: 5.0A |
Reliability Test
| Item | Specification | Test Conditions/Methods |
|---|---|---|
| Temp. Cycling Testing | No visible damage, RN / RN 20% | Ta=-403 (30min) 252 (5min) Tb=2003 (30min) 252 (5min), 5 cycles. Recover 4-5h at 252. |
| Electrical Cycling Testing | No visible damage, RN / RN 20% | Ambient temp. 252, Cycles: 1,000 times, On/Off: 1min/5min, Test Current: 5.0A. Recover 4-5h at 252. |
| Load Life (Endurance) Testing | No visible damage, RN / RN 20% | Ambient temp. 252, 3.0A / 1,00024h. Recover 4-5h at 252. |
| Humidity Testing | No visible damage, RN / RN 20% | Ambient temp. 402, R.H.: 933%, Energized time: 100024 h. Recover 4-5h at 252. |
Storage Conditions
Temperature: -10+40
Humidity: 70%RH
Environment: Avoid corrosive/oxidizing gases, flammable/explosive gases, oil, water, chemical liquids, and direct sunlight. Minimize exposure after opening package; store in a sealed container with desiccant.
Usage Restrictions: Do not exceed maximum operating current or temperature range. Ensure adequate heat dissipation to prevent overheating.
Soldering Recommendation
Wave Soldering: Refer to profile (not detailed in source).
Soldering Iron: Temperature: 360 (max), Time: 3 sec (max), Distance from resistor: 2mm (min).
Marking
NTC XD-Y: NTC thermistor, X = Rated Zero-Power Resistance, D = Disk-Type, Y = Max diameter of disk (mm).
Tape Size (for Taped Components)
| Description | Symbol | Dimension (mm) |
|---|---|---|
| Feed hole pitch | P0 | 12.7 1.0 |
| Taping pitch | P | 25.4 1.0 |
| Lead spacing | F | 7.5 1.0 |
| Feed hole off alignment | P1 | 2.6 0.7 |
| Lead crimp height | H | 20 1.0 |
| Bottom height | H1 | 40.0 max |
| Carrier tape width | W | 18.0 1.0 |
| Adhesive tape width | W0 | 8.0 / 10.0 |
| Feed hole height off alignment | W1 | 9.0 0.5 |
| Adhesive tape thickness | W2 | 3.0 max |
| Overall tape thickness | t | 0.7 0.2 |
| Body diameter | D | See separate specification |
| Feed hole diameter | D0 | 4.0 0.3 |
| Wire lead diameter | d | 0.75 |
| Lead end protrusion (F Style figure2) | A | 1.0max |
| Body thickness | T | See separate specification |
| Body warp | P | 0 0.2 |
| Body inclination | h | 2.0 max |
2411151443_DGCX-NTC-8D-15_C42383352.pdf
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