Product Overview
The Analog Technologies ATH50K1R8B3950K is an ultra-stable axial leaded thermistor designed for precise temperature sensing. Featuring glass encapsulation for long-term stability and reliability, it offers a wide operating temperature range of -55C to 250C. Its compact size (1.8mm x 3.7mm) and quick response time (20s) make it suitable for demanding applications in automotive electronics, industrial electronics, and home appliances where cost-effective and accurate temperature monitoring is crucial. This thermistor is RoHS compliant and lead-free.
Product Attributes
- Brand: Analog Technologies, Inc.
- Product Type: Ultra-Stable Axial Leaded Thermistor
- Encapsulation: Glass Encapsulated
- Leads: Tin-plated Copper-Clad Steel Wire
- Compliance: 100% Lead (Pb)-free and RoHS Compliant
Technical Specifications
| Parameter | Symbol | Value |
|---|---|---|
| Nominal Resistance @ 25C | R25 | 50K 1% |
| B Value @ 25C /50C | B25/50 | 3950K 1% |
| Thermistor Diameter | DT | 1.8 0.2mm |
| Thermistor Length | LT | 3.7 0.3mm |
| Lead Diameter | DL | 0.5 0.05mm |
| Lead Length | LL | 28 1mm |
| Dissipation Factor | th | 2mW/C |
| Insulation Resistance | Ris | 500M |
| Maximum Power @ 25C | Pmax | 50mW |
| Time Constant | c | 20s (in still air @5~25C) |
| Operating Temperature Range | -55C to 250C |
Applications
The ATH50K1R8B3950K is suitable for temperature measurement and compensation in electronic circuits, temperature control systems (thermostats, ovens, incubators), power electronics for thermal protection, automotive electronics (engine management, climate control), battery management systems (BMS), and consumer electronics (smartphones, laptops).
Part Number Convention
A TH 50K 1R8 B3950K
- A: Company Code (Analog Technologies, Inc.)
- TH: Product Type (Thermistor)
- 50K: Resistance @ 25C (R25 = 50k)
- 1R8: Diameter (1.8mm, R = Decimal Point)
- B3950K: B Value (B25/50 = 3950K)
Reliability Data
| No. | Item | Standard Test Conditions and Methods | Requirements |
|---|---|---|---|
| 1 | Terminal Pull Strength and Duration | Grip thermistor two leads Pull Strength51N, Time Duration: 101s | No Obvious Appearance Damage, R25/R25 2% |
| 2 | Solderability | IEC60068-2-20 Temperature: 245C 5C Time Duration: 2 ~ 3s | Coverage Area 95% |
| 3 | Withstand Soldering Temperature | IEC60068-2-20 Solder Pot Temperature: 260C 5C Immerse leads 6mm away from thermistor body Time Duration: 5 1s | R25/R25 2% |
| 4 | Humidity and Heat Sustainability | IEC60068-2-78 Temperature: 40C 2C Humidity: 93% 2% Time Duration: 500hrs | R25/R25 2% |
| 5 | Thermal Cycling Sustainability | IEC60068-2-14 -55C 30min25C 5min250C 30min25C 5min, 5 cycles | R25/R25 2% |
| 6 | High Temperature Storage Sustainability | IEC60068-2-2 Temperature: 250C 5C Time Duration: 1000hrs | R25/R25 2% |
| 7 | Low Temperature Storage Sustainability | IEC60068-2-1 Temperature: -55C Time Duration: 1000hrs | R25/R25 2% |
Storage and Handling Guidelines
Storage: Store in original packaging between -25C to +45C with relative humidity less than 75% (max 95%, no dew). Avoid heat, direct sunlight, and corrosive environments (SOx, Cl). Use within 12 months (SMDs) or 24 months (leaded) for optimal soldering performance.
Handling: Prevent dropping. Use gloves and avoid touching with bare hands. Prevent surface contamination.
Soldering: Use resin-type or non-activated flux. Ensure proper preheating to avoid ceramic cracks. Avoid rapid cooling by dipping in solvent. Completely remove flux residue after soldering.
Notices
1. Read and follow all warnings and cautions. Failure to do so may result in malfunction, damage, or injury.
2. Product specifications are subject to change without notice. Check descriptions before ordering. Availability is not guaranteed.
3. ATI does not guarantee product suitability for all customer applications. Customers must evaluate product appropriateness for their specific needs.
4. ATI warrants products to perform according to specifications for one year from the date of sale, except for damage due to abuse. Defective products may be exchanged free of charge.
5. ATI reserves the right to make changes or discontinue products/services without notice. Obtain the latest information before ordering.
6. Products are sold subject to terms and conditions of sale. Customers are responsible for their applications. ATI assumes no liability for application assistance or customer product design.
7. ATI grants no license under any intellectual property right.
8. Publication of third-party information does not constitute endorsement.
9. ATI retains ownership of all rights for special technologies, techniques, designs, and inventions.
10. Despite proper operation, malfunctions may occur. In safety-critical applications, implement appropriate design measures (e.g., protective circuitry, redundancy) to prevent injury or damage in case of component failure.
2401121843_ATI-ATH50K1R8B3950K_C20606752.pdf
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