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Specifications
Operating Temperature:
-40℃~+175℃
Mfr. Part #:
SMDNTC3225N03005MK0
Package:
SMD,8.1x6mm
Key Attributes
Model Number:
SMDNTC3225N03005MK0
Product Description
Product Overview
The SMD-3225 Series Sealed SMD NTC Thermistors are designed for circuit protection and various electronic applications. These thermistors feature advanced encapsulation technology with UL94-V0 rated materials, offering a compact size and excellent high-temperature and high-humidity performance. They possess strong surge suppression capabilities and are suitable for lead-free reflow/wave soldering automatic placement due to their SMD tape and reel packaging.
Product Attributes
- Brand: Songtian ()
- Product Type: Sealed SMD NTC Thermistor
- Series: SMD-3225
- Encapsulation Material: Meets UL94-V0
- Packaging: SMD Tape and Reel
- Soldering Compatibility: Lead-free Reflow/Wave Soldering
Applications
- Circuit Protection
- Industrial Equipment
- Communication Equipment
- Consumer Electronics
- Automotive Electronics
Technical Specifications
Part Number Coding Principle
SMD NTC 3225 N 2R5 05 M 0
- NTC: Negative Temperature Coefficient Thermistor
- 3225: Model, approximately 8.1*6.0mm
- N: Inner fold lead shape
- W: Outer fold lead shape
- 2R5: 25 Zero-Power Resistance (e.g., 2R5 = 2.5)
- 05: Maximum Steady State Current (e.g., 5.0A)
- M: Resistance Tolerance (e.g., M = 20%)
Product Marking Example
1. Songtian Logo
2. NTC (Negative Temperature Coefficient Thermistor)
3. 3225 (Size: approx. 8.1*6.0mm)
4. 050 (25 Zero-Power Resistance: 5.0)
5. M (Capacity Tolerance: M (20%))
Product Dimensions (mm)
Outer Fold (W)
| Parameter | Value |
|---|---|
| L | 8.1 0.3 |
| L1 | 10.0 0.3 |
| W | 6.0 0.3 |
| L2 | 11.4 0.3 |
| H | 2.5 0.3 |
| L3 | 0.5 0.3 |
| W1 | 2.5 0.3 |
| T | 0.15 0.01 |
Inner Fold (N)
| Parameter | Value |
|---|---|
| L | 8.1 0.3 |
| L1 | 8.5 0.3 |
| W | 6.0 0.3 |
| L2 | 6.0 Min |
| H | 2.5 0.3 |
| L3 | 1.1 0.3 |
| W1 | 2.5 0.3 |
Pad Dimensions (mm)
Outer Fold (W)
| Parameter | Value |
|---|---|
| a | 10.0 0.2 |
| b | 2.2 0.2 |
| c | 3.6 0.2 |
Inner Fold (N)
| Parameter | Value |
|---|---|
| a | 5.7 0.2 |
| b | 1.65 0.2 |
| c | 3.0 0.2 |
Electrical Performance
| Model | Rated Zero-Power Resistance @25 () | Max. Steady State Current @25 (A) | Max. Residual Resistance under Max. Steady State Current @25 () | B Value (K) 10% | Thermal Time Constant (S) | Thermal Dissipation Coefficient (mW/) | Operating Temperature Range () |
|---|---|---|---|---|---|---|---|
| SMDNTC3225*1R505** | 1.5 | 5 | 0.065 | 2600 | <43 | >13 | -40175 |
| SMDNTC3225*02005** | 2 | 5 | 0.085 | 2600 | <43 | >13 | -40175 |
| SMDNTC3225*2R505** | 2.5 | 5 | 0.095 | 2600 | <43 | >13 | -40175 |
| SMDNTC3225*03005** | 3 | 5 | 0.100 | 2600 | <43 | >13 | -40175 |
| SMDNTC3225*04004** | 4 | 4 | 0.150 | 2600 | <44 | >13 | -40175 |
| SMDNTC3225*05004** | 5 | 4 | 0.156 | 2800 | <45 | >13 | -40175 |
| SMDNTC3225*06003** | 6 | 3 | 0.240 | 2800 | <45 | >13 | -40175 |
| SMDNTC3225*6R803** | 6.8 | 3 | 0.245 | 2800 | <45 | >13 | -40175 |
| SMDNTC3225*07003** | 7 | 3 | 0.2824 | 2800 | <45 | >13 | -40175 |
| SMDNTC3225*08003** | 8 | 3 | 0.255 | 2800 | <47 | >14 | -40175 |
| SMDNTC3225*10003** | 10 | 3 | 0.275 | 2800 | <47 | >14 | -40175 |
| SMDNTC3225*12002** | 12 | 2 | 0.462 | 2800 | <48 | >14 | -40175 |
| SMDNTC3225*13002** | 13 | 2 | 0.465 | 2800 | <50 | >14 | -40175 |
| SMDNTC3225*15002** | 15 | 2 | 0.468 | 2800 | <50 | >14 | -40175 |
| SMDNTC3225*16002** | 16 | 2 | 0.470 | 2800 | <50 | >14 | -40175 |
| SMDNTC3225*18002** | 18 | 2 | 0.495 | 3000 | <52 | >15 | -40175 |
| SMDNTC3225*20002** | 20 | 2 | 0.512 | 3000 | <52 | >15 | -40175 |
| SMDNTC3225*22002** | 22 | 2 | 0.563 | 3000 | <52 | >15 | -40175 |
| SMDNTC3225*25002** | 25 | 2 | 0.623 | 3000 | <52 | >15 | -40175 |
| SMDNTC3225*300S5** | 30 | 1.5 | 0.667 | 3000 | <52 | >15 | -40175 |
| SMDNTC3225*330S5** | 33 | 1.5 | 0.734 | 3000 | <52 | >15 | -40175 |
| SMDNTC3225*470S5** | 47 | 1.5 | 1.002 | 3000 | <52 | >15 | -40175 |
| SMDNTC3225*500S5** | 50 | 1.5 | 1.021 | 3000 | <52 | >15 | -40175 |
| SMDNTC3225*600S5** | 60 | 1.5 | 1.215 | 3000 | <52 | >15 | -40175 |
| SMDNTC3225*800S2** | 80 | 1.2 | 1.656 | 3200 | <52 | >15 | -40175 |
| SMDNTC3225*101S1** | 100 | 1.1 | 2.053 | 3200 | <50 | >15 | -40175 |
| SMDNTC3225*121S1** | 120 | 1.1 | 2.253 | 3200 | <50 | >15 | -40175 |
| SMDNTC3225*20101** | 200 | 1 | 4.121 | 3200 | <50 | >13 | -40175 |
Reliability Testing
| No. | Item | Test Method | Standard |
|---|---|---|---|
| 1 | Vibration | Frequency: 10~55Hz, Amplitude: 0.75mm, Direction and Time: X, Y, Z axes each 2 hours | No visible damage, Resistance change rate: 10% |
| 2 | Solderability | Temperature: 2455, Time: 30.5s | Uniform tinning and area 95% |
| 3 | Resistance to Soldering Heat | Immerse product leads in 2605 solder liquid for 101 seconds, then remove. | Resistance change rate: 10% |
| 4 | High Temperature Storage | Store at 1252 for 1000+48 hours, test after 2 hours static. | Resistance change rate: 20% |
| 5 | Humidity Resistance | 1. Place product in 402, 90-95% humidity environment for 1000 hours. 2. Place product in 402, 90-95% humidity environment with 1/20 of max. dissipation voltage applied (not less than 0.5V) for 500 hours. | Resistance change rate: 20% |
| 6 | Cold and Hot Shock | -4030min 255min 12530min 255min, 5 cycles total. | Resistance change rate: 20% |
| 7 | Endurance Test | 1. 255, Imax, 1000h; 2. 255, Imax, (1min ON /5min OFF) * 1000 times. | No visible damage, Resistance change rate: 20% |
| 8 | Insulation Withstand Voltage | Apply 750Vac voltage for 1 minute between a tight coil of metal wire around the product surface encapsulation and the leads. | No external damage. |
Packaging Information
Tape Packaging Specifications (Unit: mm)
| SPEC | Inner Fold (N) | Outer Fold (W) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A0 | B0 | K0 | P | P0 | P2 | T | N() | W() | ||||||
| Value | 6.350.1 | 8.450.1 | 3.250.1 | 8.00.1 | 4.00.1 | 2.00.1 | 0.30.05 | 6.160.1 | 11.900.15 | 3.100.1 | 8.00.15 | 4.00.15 | 2.00.15 | 0.30.05 |
Component/Reel
| SPEC | Value (N) | Value (W) |
|---|---|---|
| Components/Reel | 4000pcs | 4000pcs |
15-inch Reel Dimensions (Unit: mm)
| SPEC | Inner Fold (N) | Outer Fold (W) | ||
|---|---|---|---|---|
| Value | Value | |||
| E0.5 | 2.3 | 2.3 | ||
| F0.5 | 10.75 | 10.75 | ||
| W0.2 | 16.4 | 24.4 | ||
| T10.3 | 2.2 | 2.2 | ||
| T20.3 | 2.2 | 2.2 | ||
| A+0/-2 | 380 | 380 | ||
| N3.0 | 100 | 100 | ||
| D0.3 | 13.3 | 13.3 | ||
Soldering Instructions
Lead-Free Reflow Soldering Curve
When soldering reflow capacitors, it should be performed under the following conditions:
- Soldering Temperature: 230260
- Soldering Time: 1030s
- Preheating Temperature: 170 max
Wave Soldering Curve
(Curve data not provided in source)
Soldering Iron Rework Conditions
| Condition | Value |
|---|---|
| Soldering Iron Tip Temperature | 400 (max.) |
| Soldering Time | 3.5 sec (max.) |
| Soldering Iron Power | 50W (max.) |
Storage Environment
- Store products under the following conditions and use within 6 months after delivery.
- Temperature: 10~30, Relative Humidity: 60% max.
- Solder NTC within 168 hours after opening the moisture-proof packaging. After opening, store the NTC in the moisture-proof packaging with a desiccant and HIC card, maintaining the above conditions.
- If the storage period exceeds 6 months, or the indicator color of the accompanying HIC card changes after opening the package, baking (60 * 168hr) is required before soldering.
- Reference data for baking when product humidity exceeds requirements before reflow soldering, or when exposure time exceeds bare lifespan after package opening (bare lifespan starts from zero after baking): (Data not provided in source)
- Do not store products in corrosive substances such as sulfur, chlorine gas, or acids, as this may cause lead oxidation and reduce solderability.
- To avoid the influence of moisture, dust, etc., products should be stored on shelves.
- When stored in a warehouse, avoid thermal shock, vibration, and direct sunlight.
Usage Precautions
- The operating ambient temperature should be within the specified range of the technical conditions.
- Do not install close to heat-generating or combustible components. Maintain a gap of more than 3mm to avoid damaging the components.
- Wear gloves when handling the leads.
- This specification guarantees the quality of our products as individual components. When our products are installed in your products, please ensure that your products have been effectively evaluated and confirmed according to your company's specifications.
- If your company's trial use of our products exceeds the product functions defined in this test specification, we will not be responsible for any failures caused.
- When an NTC is damaged, the failure may result in a short circuit. To prevent dangerous situations such as overheating, smoking, or fire during a short circuit, please use components like fuses in the circuit to set up an automatic fail-safe function.
2508261540_STE-SMDNTC3225N03005MK0_C50751508.pdf
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