Product Overview
The Songtian SMD-2522 Series is a series of encapsulated surface-mount thermistors designed for circuit protection and general electronic applications. These NTC thermistors feature advanced encapsulation technology meeting UL94-V0 standards, offering a compact size, small volume, and excellent high-temperature and high-humidity performance. They possess strong surge suppression capabilities and are supplied in tape and reel packaging, compatible with lead-free reflow and wave soldering for automated assembly. Applications include industrial equipment, communication devices, consumer electronics, and automotive electronics.
Product Attributes
- Brand: Songtian ()
- Series: SMD-2522
- Type: Encapsulated Surface Mount NTC Thermistor
- Encapsulation Material: Meets UL94-V0
- Packaging: Tape and Reel (SMD)
- Soldering Compatibility: Lead-free Reflow/Wave Soldering
- Origin: Shantou Free Trade Zone Songtian Electronic Technology Co., Ltd.
Technical Specifications
| Model | R25 () | Max. Steady Current @25 (A) | Max. Residual Resistance @25 () | B Value (K) 10% | Thermal Time Constant (S) | Dissipation Factor (mW/) | Operating Temp. Range () |
|---|---|---|---|---|---|---|---|
| SMDNTC2522N2R504** | 2.5 | 4 | 0.113 | 2600 | <35 | >11 | -40 to 175 |
| SMDNTC2522N03004** | 3 | 4 | 0.100 | 2600 | <35 | >11 | -40 to 175 |
| SMDNTC2522N04003** | 4 | 3 | 0.150 | 2600 | <35 | >11 | -40 to 175 |
| SMDNTC2522N05003** | 5 | 3 | 0.156 | 2800 | <34 | >11 | -40 to 175 |
| SMDNTC2522N06002** | 6 | 2 | 0.240 | 2800 | <34 | >11 | -40 to 175 |
| SMDNTC2522N6R802** | 6.8 | 2 | 0.245 | 2800 | <34 | >11 | -40 to 175 |
| SMDNTC2522N07002** | 7 | 2 | 0.2824 | 2800 | <34 | >11 | -40 to 175 |
| SMDNTC2522N08002** | 8 | 2 | 0.255 | 2800 | <32 | >11 | -40 to 175 |
| SMDNTC2522N10002** | 10 | 2 | 0.275 | 2800 | <32 | >11 | -40 to 175 |
| SMDNTC2522N12001** | 12 | 1 | 0.462 | 2800 | <32 | >11 | -40 to 175 |
| SMDNTC2522N13001** | 13 | 1 | 0.465 | 2800 | <32 | >11 | -40 to 175 |
| SMDNTC2522N15001** | 15 | 1 | 0.468 | 2800 | <30 | >11 | -40 to 175 |
| SMDNTC2522N16001** | 16 | 1 | 0.470 | 2800 | <30 | >11 | -40 to 175 |
| SMDNTC2522N18001** | 18 | 1 | 0.495 | 3000 | <30 | >11 | -40 to 175 |
| SMDNTC2522N20001** | 20 | 1 | 0.512 | 3000 | <30 | >11 | -40 to 175 |
| SMDNTC2522N22001** | 22 | 1 | 0.563 | 3000 | <30 | >11 | -40 to 175 |
| SMDNTC2522N25001** | 25 | 1 | 0.623 | 3000 | <30 | >11 | -40 to 175 |
| SMDNTC2522N30001** | 30 | 1 | 0.667 | 3000 | <30 | >11 | -40 to 175 |
| SMDNTC2522N33001** | 33 | 1 | 0.734 | 3000 | <30 | >11 | -40 to 175 |
| SMDNTC2522N47001** | 47 | 1 | 1.002 | 3000 | <30 | >11 | -40 to 175 |
| SMDNTC2522N50001** | 50 | 1 | 1.021 | 3000 | <30 | >11 | -40 to 175 |
| SMDNTC2522N600X8** | 60 | 0.8 | 1.215 | 3000 | <30 | >11 | -40 to 175 |
| SMDNTC2522N800X8** | 80 | 0.8 | 1.656 | 3200 | <30 | >11 | -40 to 175 |
| SMDNTC2522N101X8** | 100 | 0.8 | 2.053 | 3200 | <30 | >11 | -40 to 175 |
| SMDNTC2522N121X8** | 120 | 0.8 | 2.253 | 3200 | <30 | >11 | -40 to 175 |
| SMDNTC2522N201X5** | 200 | 0.5 | 4.121 | 3200 | <32 | >11 | -40 to 175 |
| Product Dimensions (mm) | Pad Dimensions (mm) | ||
|---|---|---|---|
| Parameter | Value | Parameter | Value |
| L | 6.00.1 | a | 5.5 Min |
| L1 | 7.00.15 | b | 2.20.1 |
| W | 5.550.1 | c | 3.60.2 |
| L2 | 6.00.15 | ||
| H | 2.380.1 | ||
| L3 | 0.50.1 | ||
| W1 | 2.50.02 | ||
| Reliability Test | |||
|---|---|---|---|
| No. | Item | Test Method | Standard |
| 1 | Vibration | Frequency: 10~55Hz, Amplitude: 0.75mm, Direction: X, Y, Z axes for 2 hours each | No visible damage, Resistance change rate: 10% |
| 2 | Solderability | Temperature: 2455, Time: 30.5s | Uniform tinning, area 95% |
| 3 | Resistance to Soldering Heat | Immerse leads in 2605 solder bath for 101s | Resistance change rate: 10% |
| 4 | High Temperature Storage | 1000+48 hours at 1252, static for 2 hours | Resistance change rate: 20% |
| 5 | Damp Heat Resistance | 1000 hours at 402, 90-95% RH; or 500 hours with 1/20 max dissipation voltage (min 0.5V) | Resistance change rate: 20% |
| 6 | Thermal Shock | -4030min 255min 12530min 255min, 5 cycles | 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 Voltage Proof | 750Vac applied for 1 minute between windings and leads | No external damage |
| Packaging Information (Tape Reel) | |
|---|---|
| Parameter | Value (mm) |
| A0 | 5.70.1 |
| B0 | 7.30.1 |
| K0 | 2.70.1 |
| P | 12.00.1 |
| P0 | 4.00.1 |
| P2 | 2.00.1 |
| T | 0.30.1 |
| N (Inner Fold) | 16.00.3 |
| W | 1.750.1 |
| E | 7.50.1 |
| F | 1.5+0.1/-0 |
| D0 | 1.50+0.1/-0 |
| D1 | |
| Components per Reel (N Inner Fold) | 3000pcs |
| Packaging Information (13-inch Reel) | |
|---|---|
| Parameter | Value (mm) |
| 12 | |
| E | 2.6 |
| F | 10.8 |
| W | 1.0 |
| 12.5 | |
| T1 | 0.2 |
| 2.0 | |
| T2 | 0.2 |
| 2.0 | |
| A | +0/-2 |
| 330 | |
| N | 3.0 |
| 100 | |
| Soldering Instructions (Lead-Free Reflow) | |
|---|---|
| Parameter | Condition |
| Peak Temperature | 230260 |
| Time above 230 | 1030s |
| Preheating Temperature | 170 max. |
| Soldering Instructions (Soldering Iron Rework) | |
|---|---|
| Parameter | Condition |
| Soldering Iron Tip Temperature | 400 (max.) |
| Soldering Time | 3.5 sec (max.) |
| Soldering Iron Power | 50W (max.) |
| Storage Environment | |
|---|---|
| Parameter | Condition |
| Recommended Storage Period | Within 6 months after delivery |
| Temperature | 10~30 |
| Relative Humidity | 60% max. |
| Soldering after Opening Moisture-proof Bag | Within 168 hours |
| Re-baking (if required) | 60 * 168hr |
| Usage Precautions | |
|---|---|
| Parameter | Notes |
| Operating Temperature | Must be within specified technical range. |
| Component Placement | Avoid placement near heat-generating or combustible components; maintain >3mm spacing. |
| Handling | Wear gloves when handling leads. |
| Product Integration | Customer must evaluate and confirm the integration of Songtian products into their own systems. |
| Failure Mode | In case of NTC failure, a short circuit may occur. Implement fail-safe mechanisms (e.g., fuses) to prevent hazards like ignition or fire. |
2508261540_STE-SMDNTC2522N2R504MK0_C50751518.pdf
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