| product guide | |||||
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| Normal Size | ||||||||
| Style | Dimensions (mm) | Max. Working Voltage |
Max. Overload Voltage |
Dielectric Withstanding Voltage |
Resistance Range  |
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| L Max | D Max | H ±3 | d + 0.02 -0.05 |
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| MOR-1/4W | 7.5 | 2.5 | 28 | 0.6 | 250V | 400V | 250V | 0.3 ~ 50K |
| MOR-1/2W | 10.0 | 4.0 | 28 | 0.6 | 250V | 400V | 250V | 0.3 ~ 50K |
| MOR-1W | 12.0 | 5.0 | 28 | 0.7 | 350V | 600V | 350V | 0.3 ~ 50K |
| MOR-2W | 16.0 | 5.5 | 28 | 0.8 | 350V | 600V | 350V | 0.3 ~ 50K |
| MOR-3W | 17.5 | 6.5 | 28 | 0.8 | 500V | 800V | 500V | 5 ~ 100K |
| MOR-5W | 26.0 | 8.5 | 38 | 0.8 | 750V | 1000V | 750V | 5 ~ 150K |
| MOR-7W | 32.0 | 8.5 | 38 | 0.8 | 750V | 1000V | 750V | 20 ~ 150K |
| MOR-8W | 41.0 | 8.5 | 38 | 0.8 | 750V | 1000V | 750V | 30 ~ 200K |
| MOR-9W | 54.0 | 8.5 | 38 | 0.8 | 750V | 1000V | 750V | 50 ~ 200K |
| Small Size | ||||||||
| Style | Dimensions (mm) | Max. Working Voltage |
Max. Overload Voltage |
Dielectric Withstanding Voltage |
Resistance Range |
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| L Max | D Max | H ±3 | d + 0.02 -0.05 |
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| MOR-1/2W-S | 7.5 | 2.5 | 28 | 0.6 | 250V | 400V | 250V | 0.3 ~ 50K |
| MOR-1W-S | 10.0 | 4.0 | 28 | 0.7 | 350V | 600V | 350V | 0.3 ~ 50K |
| MOR-2W-S | 12.0 | 5.0 | 28 | 0.7 | 350V | 600V | 350V | 0.3 ~ 50K |
| MOR-3W-S | 16.0 | 5.5 | 28 | 0.8 | 350V | 600V | 350V | 0.3 ~ 50K |
| MOR-5W-SS | 17.5 | 6.5 | 28 | 0.8 | 500V | 800V | 500V | 5 ~ 100K |
| MOR-5W-S | 25.0 | 8.0 | 38 | 0.8 | 500V | 800V | 500V | 0.22 ~ 150K |
| * Too low or too high ohmic value can be supplied on a case to case basis. | ||||||||
| Performance Specifications | |||||||||||||||||
| Characterisitcs | Test Methods | Limits | |||||||||||||||
| Temperature coefficient JIS -C -5202 5.2 |
Natural resistance change per temp. degree centigrade
R1: Resistance value at room temperature (t1) R2: Resistance value at room temp. +100°C (t2) Test pattern: Room temp., Room temp. +100°C |
±350PPM/°C | |||||||||||||||
| Dielectric withstanding voltage JIS - C - 5202 5.7 |
Resistors shall be clamped in the trough of a 90° metalic V-block and shall be tested at AC potential respectively specified in the above list for 60 +10 / -0 seconds. |
No evidence of flashover, mechanical damage, arcing or insulation break down. | |||||||||||||||
| Temperature cycling JIS - C - 5202 7.4 |
Resistance change after continuous five cycles for duty cycle specified below:
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Resistance change rate is ± (2% +0.05  ) Max. with no evidence of mechanical damage |
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| Humidity (steady state) JIS - C - 5202 7.5 |
Temporary resistance change after a 240 hour exposure in a humidity test chamber controlled at 40°C ± 2°C and 90-95% relative humidity. | Resistance change rate is ± (2%+0.05) Max. with no evidence of mechanical damage. |
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| Short-time overload JIS - C - 5202 5.5 |
Permanent resistance change after the application of a potential of 2.5 times RCWV or the max. overload voltage respectively specified in the above list, whichever less for 5 seconds. | Resistance change rate is N: ± (1%+0.05) Max. S: ± (2%+0.05) Max. with no evidence of mechanical damage. |
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| Pulse overload JIS - C - 5202 5.8 |
Resistance change after 10,000 cycles (1 second "ON", 25 seconds "OFF") at 4 times RCWV or the max. pulse overload voltage. | Resistance change rate is N: ± (2%+0.05) Max. S: ± (5%+0.05) Max. with no evidence of mechanical damage. |
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| Load life in humidity JIS - C - 5202 7.9 |
Resistance change after 1,000 hours (1.5 hours "ON", 0.5 hour "OFF") at RCWV in a humidity test chamber controlled at 40°C ± 2°C and 90-95% relative humidity. | Resistance change rate is ± (5%+0.05) Max. with no evidence of mechanical damage. |
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| Load life JIS - C - 5202 7.10 |
Permanent resistance change after 1,000 hours operating at RCWV, with duty cycle of 1.5 hours "ON", 0.5 hour "OFF" at 70°C ± 2°C ambient. | Resistance change rate is ± (5%+0.05) Max. with no evidence of mechanical damage |
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| Terminal strength JIS - C - 5202 6.1 |
Direct load: Resistance to a 2.5 kg direct load for 10 seconds in the direction of the longitudinal axis of the terminal leads. Twist test: Terminal leads shall be bent through 90° at a point of about 6mm from the body of the resistor and shall be rotated through 360° about the original axis of the bent terminal in alternating direction for a total of 3 rotations. |
No evidence of mechanical damage | |||||||||||||||
| Resistance to soldering heat JIS - C - 5202 6.4 |
Permanent resistance change when leads immersed to 3.2 - 4.8 mm from the body in 350°C ± 10°C solder for 3 ± 0.5 sec. | Resistance change rate is ± (1%+0.05) Max. with no evidence of mechanical damage. |
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| Solderability JIS - C - 5202 6.5 |
The area covered with a new, smooth, clean, shiny and continuous surface free from concentrated pinholes. Test temp. of solder: 235°C ± 5°C Dwell time in solder: 3 +0.5 / -0 seconds |
95% coverage min. | |||||||||||||||
| Resistance to solvent JIS - C - 5202 6.9 |
Specimens shall be immersed in a bath of trichroethane completely for 3 minutes with ultrasonic. | No deterioration of protective coatings and markings | |||||||||||||||
| Flame retardent JIS - C - 5202 7.12 |
Resistors shall resist flaming or arcing when overloaded up to 16 times RCWV. | No evidence of flaming or arcing. | |||||||||||||||
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| Derating Curve | Heat Rise Chart | |
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