Product Overview

The SMD-2522 Series is a range of encapsulated surface-mount thermistors designed for circuit protection and various electronic applications. These NTC thermistors feature advanced encapsulation technology meeting UL94-V0 standards, offering a compact size, small volume, and excellent space-saving capabilities. They provide superior performance in high-temperature and high-humidity environments, along with strong surge current suppression. Packaged in SMD tape reels, they are suitable for lead-free reflow and wave soldering automated assembly.

Product Attributes

• Brand: Songtian ()
• Series: SMD-2522
• Encapsulation Material: Meets UL94-V0
• Packaging: SMD Tape Reel
• Soldering Compatibility: Lead-free Reflow/Wave Soldering
• Origin: Shantou Free Trade Zone Songtian Electronic Technology Co., Ltd.

Technical Specifications

Product Dimensions (SMD-2522 Series):

Pad Dimensions (SMD-2522 Series):

Electrical Characteristics:

Applications:

• Circuit Protection
• Industrial Equipment
• Communication Equipment
• Consumer Electronics
• Automotive Electronics

Part Number Coding Principle:

SMD NTC 2522 N 050 04 M 0

• NTC: Negative Temperature Coefficient Thermistor
• Internal Management Code
• Model: SMD
• Size: 2522 (approx. 6.0*5.5mm)
• Lead Shape: N (Inner Fold)
• Zero-Power Resistance @25: 020: 2.0, 050: 5.0, 201: 200
• Max. Steady Current: X5: 0.5A, 01: 1.0A, 02: 2.0A, 03: 3.0A, 04: 4.0A
• Resistance Tolerance: L: 15%, M: 20%

Product Marking (Example):

1. Songtian Logo
2. NTC (Negative Temperature Coefficient Thermistor)
3. 2522 (Size: approx. 6.0*5.5mm)
4. 050 (Zero-Power Resistance @25: 5.0)
5. M (Capacity Tolerance: M (20%))

Reliability Testing:

Packaging Information:

Carrier Tape Packaging:

13-inch Reel Dimensions:

Outer Carton Packaging:

Lead Form N: Inner Fold

Curves:

• Resistance-Temperature Characteristic Curve
• Maximum Current Derating Curve
  ITa = [1-(Ta-25)/(Tu-25)]Imax
  TU: Upper Limit of Working Temperature ()
  TL: Lower Limit of Working Temperature ()
  Ta: Ambient Temperature ()
  Imax: Maximum Steady Current

Soldering Instructions:

• Lead-Free Reflow Soldering Curve:
  When reflow soldering capacitors, it should be performed under the following conditions:
  Soldering Temperature: 230260
  Soldering Time: 1030s
  Preheating Temperature: 170 max
• Wave Soldering Curve
• Soldering Iron Rework Conditions:
  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 the moisture-proof packaging, store the NTC in the moisture-proof packaging with 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 the package is opened, baking (60 * 168hr) is required before soldering.
• Reference data for baking before reflow soldering when the exposure time of the opened product exceeds the exposure life, or when the temperature and humidity around the product exceed the requirements due to other reasons (exposure life starts from zero after baking).
• Do not store products in corrosive substances such as sulfur, chlorine gas, or acid, as this will cause pin oxidation and reduce solderability.
• To avoid the influence of moisture, dust, and other substances, products should be stored on shelves.
• Products stored in warehouses should avoid thermal shock, vibration, and direct sunlight.

Usage Precautions:

• The working environment temperature should be within the range specified by the technical conditions.
• Do not install close to heat-generating or combustible components; maintain a gap of more than 3mm if possible to avoid damaging the components.
• Wear gloves before touching the pins.
• 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 specifications.
• If your trial use of our products exceeds the product functions defined by this test specification, we will not be responsible for any resulting failures.
• When an NTC is damaged, the failure may result in a short circuit. To prevent dangerous situations such as ignition, smoking, or fire during a short circuit, please implement automatic fail-safe functions using components such as fuses in the circuit.