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U1M-342-IT1
Suggested applications
Temperature sensing in microwave ovens
Temperature sensing of catalyst and exhaust gases in waste disposal machinery
Advantages
Wide operating temperature range
Easy installation using one M3-size screw
UL listed component (UL E222639)
Shape and dimensions:
Lot mark
Indicated in black, using last figures of years and month.
(note: October, November and December are shown as X, Y and Z)
Example: "41" means manufactured in January of 2004
Specifications:
| Resistance | R = 4kΩ ±5% (at 200℃) |
| B constant | B = 5133K ±2% (between 200℃ and 300℃) |
| Insulation resistance | Over 100MΩ at 500V DC megger (at room temperature, between protecting pipe and connector) |
| Dielectric strength | No failure with 1250V AC applied for one minute, 1500V AC for 1 second (cut-off current 0.5mA, at room temperature, between protecting pipe and connector) |
| Thermal time constant | τ = approximately 80 seconds (in still air) |
| Thermal dissipation constant | σ = approximately 4mW/℃ (in still air) |
| Maximum power consumption | 10mW at 25℃ |
| Recommended power consumption | below 0.35mW |
| Operating temperature range | 0℃ to +400℃ (from flange to tip of pipe) |
| Maximum operating temperature | +500℃ x 100 hours (from flange to tip of pipe) |
| Storage temperature range | +15℃ to +35℃ (recommended value) |
| Storage humidity range | 25 to 85% relative humidity (recommended value) |
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 Download R/T table for U1M-342-IT1
Reliability testing: other rating
Normal operations cannot be guaranteed if the following parameters are exceeded
| Mechanical strength tests |
| Lead tensile strength | Protecting pipe is fixed; 20N of straight pulling force is gradually applied to lead wires (two wires together), then held for 10 seconds. |
| Bending test | Protecting pipe is fixed so that the lead wires are vertical; wires are bent 90° to the right for 5 seconds, then 90° to the left, completing one cycle. 5 cycles are performed. |
| Drop test | Drop from height of 75cm onto 15 x 15cm oak board of 3cm or greater thickness.
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| Environmental resistance tests |
| Heat resistance | 1,000 hours at 400℃ ±10℃ |
| Moisture resistance | 1,000 hours in air at 60℃ ±2℃, relative humidity 90 to 95% |
| Temperature cycle | 500 cycles of the following test:
400℃ ±10℃ to room temperature to 0℃ ±5℃
*CHART TO COME |
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Instructions for handling, installation and use of thermistors
Please carefully follow these instructions to avoid damage and/or faulty operation of the thermistors:
| 1. | Never exceed maximum rated power. |
| 2. | When the thermistor is used as a sensor for the control of a device, be sure to incorporate appropriate safety measures to prevent accidents, such as a separate safety circuit or back-up sensor. |
| 3. | If the thermistor will be exposed within the device, an instruction to end users warning that the thermistor must not be touched must be included. |
| 4. | Ensure that the thermistor is not placed into the mouth or eyes; keep away from children and pets. |
| 5. | Use of thermistors in the following conditions may degrade thermistor function or lifespan; the customer must make their own checks of performance and reliability:
Corrosive gases, such as C12, NH3, SOx, NOx
Environment with high electric conductivity, such as electrolytes, water, saltwater, etc.
Presence of acids, alkalis or organic solvents
Dusty or dirty environments
When thermistors are resin sealed or resin coated
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| 6. | When disposing of thermistors, treat them as industrial waste and observe all applicable laws and regulations. |
| 7. | The thermistor is not waterproof, so the area from the flange to the lead wire end should be kept from dew, condensate and other moisture; horizontal installation is recommended. |
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U1M-342-IT1
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