product guide
METAL FILM, FUSIBLE RESISTOR
Resistance Tolerance ± 5%
Features:
- UL Approved
- Ideal circuit opening controller, disconnecting units from overload rating specified
- Too low or too high ohmic value can be supplied on a case to case basis
Fusing Characteristics
FRN-25
FRN-50
FRN-100
FRN-200 & FRN-300
Derating Curve Overload Curve
Performance Specifications
Characterisitcs Test Methods Limits
Temperature coefficient
JIS -C -5202 5.2		 Natural resistance change per temp. degree centigrade
R2 -R1 x 106 (PPM/°C)
R1 (t2 - t1)

R1: Resistance value at room temperature (t1)
R2: Resistance value at room temp. plus100°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:
Step Temperature Time
1 -55°C ± 3°C 30 mins
2 Room temp. 10 ~ 15 mins
3 +155°C ± 2°C 30 mins
4 Room temp. 10 ~ 15 mins
Resistance change rate is ± (2% +0.05 ) Max. with no evidence of mechanical damage
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 ± (5%+0.05) Max. with no evidence of mechanical damage.
Short-time overload
JIS -C -5202 5.5		 Permanent resistance change after the application of a potential of 2.5 times RCWV for 5 seconds. Resistance change rate is ± (2%+0.05) Max. with no evidence of mechanical damage.
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.
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 ambient. Resistance change rate is ± (5%+0.05) Max. with no evidence of mechanical damage
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
Solderability
JIS -C -5202 6.5		 The area covered eith 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.
Flame retardent
JIS -C -5202 7.12		 The burner is placed remote from rsistor ignited and adjusted to produce a blue flame 38mm in height and a top flame 127mm above the top of burner tube.
Resistor is supported from its lead at 45 degree from the horizontal so that the lower end of resistor is the top of blue flame. The tes flame is placed to remain for 15 seconds and removed for 15 seconds. The operation is to be repaeated until resistor has been subjected to 5 application of test flame.		 Not have any specimens which burn with flaming combustion after each application of test flame.
ORDERING INFORMATION
Example: 1W 10ohm 5%
FRN-100
10R0
J
Type
Resistance
Tolerance
4 digit. <100 use R for decimal. >100 4th digit is multiplier
J = 5%
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