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RESISTOR CATEGORIES > FUSIBLE METAL FILM RESISTORS > FR Series
FR Series
FUSIBLE METAL FILM RESISTORS

FLAME-PROOF TYPE
FR SERIES

INTRODUCTION

These Fusible Resistors contain both functions as being resistor in normal condition and turned into fuse while abnormal current comes in. The FR series Fusible Metal Film Resistors are manufactured by high vacuum sputtering deposit metal film on high thermal conductivity and specific gravity ceramic rods, and are coated with multilayers of green color flameproof lacquer.
GENERAL SPECIFICATIONS
TPYE DIMENSION (mm) POWER
RATING 		MAXIMUM
WORKING
VOLTAGE 		MAXIMUM
OVERLOAD
VOLTAGE 		RESISTANCE RANGE
L ФD H Фd( ?0.05) ?2%(G) ?5%(J)
FR-25 6.0 ?0.2 2.3 ?0.3 28.0 ?2 0.5 1/4W 250V 300V 4.7 Ω -1K 2.2 Ω -1K
FR-50 9.0 ?0.5 3.2 ?0.3 26.0 ?2 0.6 1/2W 250V 400V 4.7 Ω - 1K 2.2 Ω - 1K
FR-100 11.0 ?0.5 4.5 ?0.5 35.0 ?2 0.8 1W 300V 500V 4.7 Ω - 1K 0.27 Ω - 1K
FR-200 15.0 ?0.5 5.0 ?0.5 32.0 ?2 0.8 2W 350V 500V 4.7 Ω - 1K 0.33 Ω - 1K
FR-300S 15.0 ?0.5 5.0 ?0.5 32.0 ?2 0.8 3WS 500V 500V 4.7 Ω - 1K 0.33 Ω - 1K
FR-300 17.0 ?0.5 6.0 ?0.5 32.0 ?2 0.8 3W 500V 500V 4.7 Ω -1K 0.33 Ω -1K
Other resistance value on request.
CHARACTERISTICS POWER
Temperature Coefficient ?350ppm
Insulation Resistance 1,000 M Ω Min
Load Life (1,000 hours)

?5% + 0.05 Ω)Max

Short-time Overload

?2% + 0.05Ω) Max

Temperature Cycling ?1% + 0.05Ω) Max
Moisture Resistance ?5% + 0.05Ω) Max
Shock and Vibration ?1% + 0.05Ω) Max
Effect of Soldering ?1% + 0.05Ω) Max
POWER Fusing Time
Maximum
16 x Wattage 1 Min.
20 40 Sec.
24 30 Sec.
28 20 Sec.
32 15 Sec.

NOTE :
 After voltaged the variable rate of resistance in excess (over) 100 times is open.
Operating Temperature Range

- 30°C~155°C.

OPERATING CURVE  
 
FUSING CHARACTERISTICS
WILDEX CORPORATION
 6F, NO.151, Sec.3, Beishen Rd, Shenkeng Dist, New Taipei City, Taiwan.
TEL:886-2-26641909 FAX:886-2-26640242 wildex@wildexco.com、wildex@ms26.hinet.net