Product Overview
The LA73 series offers thick film linear positive temperature coefficient (PTC) flat chip resistors, also known as Thermal Sensors. These components are designed for applications requiring temperature-dependent resistance changes. They feature a linear positive relationship between temperature and resistance, quick thermal response, and are suitable for both reflow and wave soldering processes. The product's lead-free termination meets EU-RoHS requirements, with exemptions for lead glass used in electrodes, resistor elements, and glass. These sensors are ideal for general industrial applications, with a specific caution advised for use in automotive, medical, and aerospace equipment due to the potential for serious damage or loss of life in case of malfunction. The product is manufactured by KOA Global.
Product Attributes
- Brand: KOA Global
- Product Type: Thermal Sensors (Thick Film Linear Positive Temperature Coefficient Flat Chip Resistors)
- Coating Color: Orange
- Certifications: EU-RoHS compliant (with specific exemptions)
- Reference Standards: IEC 60115-8, JIS C 5201-8
Technical Specifications
| Specification | Details | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Series | LA73 | ||||||||||||||||||||||||
| Features | Resistance value changes linearly positive to temperature, Quick response to temperature change, Suitable for reflow and flow solderings, Lead-free termination (EU-RoHS compliant) | ||||||||||||||||||||||||
| Dimensions (Inch Size Code) | 1J (0603), 2A (0805), 2B (1206) | ||||||||||||||||||||||||
| Dimensions (mm) |
| ||||||||||||||||||||||||
| Weight (g/1000pcs) | 1J: 0.45, 2A: 0.5, 2B: 0.6 | ||||||||||||||||||||||||
| Type Designation Structure | LA73 - [Size Code] - [Power Rating] - [Product Code] - [Resistance Tolerance] - [T.C.R.] - [Termination Surface Material] - [Taping] | ||||||||||||||||||||||||
| Power Rating | 1J: 0.063W, 2A: 0.1W, 2B: 0.125W | ||||||||||||||||||||||||
| Resistance Tolerance | J: 5% | ||||||||||||||||||||||||
| T.C.R. (10^-6/K) | 4 digits (e.g., 1000, 1200, 1400, etc.) | ||||||||||||||||||||||||
| Termination Surface Material | T: Sn (Lead-free is standard) | ||||||||||||||||||||||||
| Taping | TD: 4mm pitch punch paper, BK: Bulk | ||||||||||||||||||||||||
| Ratings (for TD 1J) | Thermal Dissipation Constant: 7.6 mW/, Max. Working Voltage: 25V, Rated Ambient Temp.: +70, Operating Temp. Range: -55 to +125, Taping & Q'ty/Reel: 5,000 pcs | ||||||||||||||||||||||||
| Ratings (for TD 2A) | Thermal Dissipation Constant: 8.2 mW/, Max. Working Voltage: 50V, Rated Ambient Temp.: +70, Operating Temp. Range: -55 to +125, Taping & Q'ty/Reel: 5,000 pcs | ||||||||||||||||||||||||
| Ratings (for TD 2B) | Thermal Dissipation Constant: 9 mW/, Max. Working Voltage: 50V, Rated Ambient Temp.: +70, Operating Temp. Range: -55 to +125, Taping & Q'ty/Reel: 5,000 pcs | ||||||||||||||||||||||||
| Resistance Range () | E12 series (e.g., 1k10k, 6806.8k, 4704.7k, etc., varies by T.C.R.) | ||||||||||||||||||||||||
| T.C.R. Tolerance | 20010^-6/K | ||||||||||||||||||||||||
| T.C.R. Measuring Temperature | +25/+75 | ||||||||||||||||||||||||
| Derating Curve | Applies for ambient temperatures of 70 or above. | ||||||||||||||||||||||||
| Approximate Expression for Resistance-Temperature Characteristics | RT=R25(C0+C1T+C2T2) (Typical values, not guaranteed) | ||||||||||||||||||||||||
| Performance Test Items | Resistance, T.C.R., Overload (Short time), Resistance to soldering heat, Rapid change of temperature, Moisture resistance, Endurance at 70 | ||||||||||||||||||||||||
| Performance Requirements (Limit) | R(+0.1 ) values vary by test item (e.g., 1%, 3%) | ||||||||||||||||||||||||
| Performance Requirements (Typical) | Values vary by test item (e.g., 0.5%, 1.5%) | ||||||||||||||||||||||||
| Actual Value (Out of guarantee) - High temperature exposure | 3% at +125, 1000h | ||||||||||||||||||||||||
| Actual Value (Out of guarantee) - ESD | 300V Human model, 100pF 1.5k | ||||||||||||||||||||||||
| Precautions | Consider self-heating for resistance change. Be cautious of static electricity damage during assembly and mounting. Resistance drift may be larger above 70. Special film may be damaged by ESD. |
2410121441_KOA-LA731JTTD222J1000_C516163.pdf
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