Product Overview
The Analog Technologies ATH30K1R8B3950K 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), high resistance accuracy (1%), 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 also 100% Lead (Pb)-free and RoHS Compliant.
Product Attributes
- Brand: Analog Technologies, Inc.
- Product Type: Ultra-Stable Axial Leaded Thermistor
- Encapsulation: Glass
- Leads: Tin-plated Copper-Clad Steel Wire
- Certifications: 100% Lead (Pb)-free and RoHS Compliant
- Dimensions (Thermistor Body): 1.8mm x 3.7mm
- Dimensions (Leads): Diameter 0.5mm, Length 28mm
Technical Specifications
| Parameter | Symbol | Value | Tolerance |
|---|---|---|---|
| Nominal Resistance @ 25C | R25 | 30K | 1% |
| B Value @ 25C / 50C | B25/50 | 3950K | 1% |
| Thermistor Diameter | DT | 1.8 mm | 0.2 mm |
| Thermistor Length | LT | 3.7 mm | 0.3 mm |
| Lead Diameter | DL | 0.5 mm | 0.05 mm |
| Lead Length | LL | 28 mm | 1 mm |
| 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 | ||
| Stability | <0.1C/year | ||
Applications
The ATH30K1R8B3950K 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).
Reliability Data
| Item | Standard Test Conditions | Requirements |
|---|---|---|
| Terminal Pull Strength and Duration | IEC60068-2-21, Grip thermistor two leads, Pull Strength: 51N, Time Duration: 101s | No Obvious Appearance Damage, R25/R25 2% |
| Solderability | IEC60068-2-20, Temperature: 245C 5C, Time Duration: 2 ~ 3s | Coverage area 95%. |
| 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% |
| Humidity and Heat Sustainability | IEC60068-2-78, Temperature: 40C 2C, Humidity: 93% 2%, Time Duration: 500hrs | R25/R25 2% |
| Thermal Cycling Sustainability | IEC60068-2-14, -55C 30min25C 5min250C 30min25C 5min, 5 cycles | R25/R25 2% |
| High Temperature Storage Sustainability | IEC60068-2-2, Temperature: 250C 5C, Time Duration: 1000hrs | R25/R25 2% |
| Low Temperature Storage Sustainability | IEC60068-2-1, Temperature: -55C, Time Duration: 1000hrs | R25/R25 2% |
Part Number Convention
ATH30K1R8B3950K
- ATH: Company Code (Analog Technologies, Inc.)
- 30K: Resistance @ 25C (R25 = 30k)
- 1R8: Diameter (1.8mm)
- B3950K: B Value (B25/50 = 3950K)
- R: Decimal Point
Storage and Handling Recommendations
Storage: Store in original packaging between -25C to +45C with relative humidity <75% (average) and max 95%. Avoid heat, direct sunlight, and corrosive gases. Use within 12 months (SMD) or 24 months (leaded) after shipment for optimal soldering performance.
Handling: Prevent dropping to avoid damage. 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 prior notice. Check descriptions before ordering. Availability is not guaranteed.
3. Customers are responsible for evaluating product suitability for their specific applications. ATI does not guarantee suitability for all applications.
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 within warranty may be exchanged free of charge.
5. ATI reserves the right to make changes or discontinue products/services without notice.
6. All products are sold subject to terms and conditions of sale. Customers are responsible for their applications using ATI products.
7. ATI does not grant any license under its intellectual property rights.
8. Publication of third-party information does not constitute endorsement.
9. ATI retains ownership of all rights for its technologies, designs, and improvements.
10. Despite operating within specifications, malfunctions may occur. In safety-critical applications, implement measures to prevent injury or damage in case of component failure.
2401121843_ATI-ATH30K1R8B3950K_C20606751.pdf
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