RXF21A/B/C (FRT) wire - wound fusing resistors

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RXF21A/B/C (FRT) wire - wound fusing resistors

Product Features

Excellent surge - proof performance.
Resistance fuses instantaneously in case of a short - circuit.
Approved by UL, CUL, VDE, and CQC.
Grey flame - retardant coating, color marking, and blister - tape and lead forming (optional) are available.

Applications

Special for energy - saving lamps (RXF21A/C).
Special for chargers (RXF21B).

Dimensions (mm)

Type	Lmax	Dmax	d ± 0.05	l ± 3
RXF21(A/B) - 1W(1/2W)	10.5	3.9	0.7	25.0
RXF21(A/B) - 2W(1W)	14.0	5.5	0.8	33.0
RXF21(A/B) - 3W(2W)	17.0	6.5	0.8	32.0
RXF21(C) - 1755	7.0	2.7	0.6	25
RXF21(C) - 2070	9.5	3.5	0.7	25
RXF21(C) - 2580	10.5	3.9	0.7	25
RXF21(C) - 3011	14.0	5.0	0.8	33

Fusing Time Characteristics (RXF21C)

Reted Current	Fusing Time
100%	4 hours Min
200%	60 Secs Max

Test Items, Specifications and Test Methods

Test Item	Specifications	Test Method
Short - time overload	ΔR ≤ ± (2%R + 0.05Ω)	10VR, 5S
Rapid change of temperature	ΔR ≤ ± (1%R + 0.05Ω)	- 55°C/275°C, 30min, 5 cycles
Resistance to sold heat	ΔR ≤ ± (1%R + 0.05Ω)	350 ± 10°C, 3.5 ± 0.5S
Climatic category	ΔR ≤ ± (5%R + 0.1Ω)	125°C, 16h/55°C, RH93 ± 3%, 24h/ - 55°C, 2h/8.5kpa, 15 - 35°C, 1h
Endurance at 70°C	ΔR ≤ ± (5%R + 0.1Ω)	70 ± 2°C, PR, 1000h

Technical Specifications

Type	Rated Power	Resistance Range (Ω)	Tolerances	Rating Ambient Temp	Operating Temp. Range
RXF21(A/B) - 1W(1/2W)	1W(1/2W)	0.1Ω - 120Ω	multirow{3}{*}{± 5% ± 10%}	multirow{3}{*}{70°C}	multirow{3}{*}{- 55°C - 155°C}
RXF21(A/B) - 2W(1W)	2W(1W)	0.1Ω - 120Ω
RXF21(A/B) - 3W(2W)	3W(2W)	0.2Ω - 470Ω

Type	Rated Voltage	Rated Current
RXF21(C) - 1755	250V	0.5A - 3.15A
RXF21(C) - 2070	250V	0.5A - 4A
RXF21(C) - 2580	250V	0.5A - 5A
RXF21(C) - 3011	250V	0.5A - 5A

Shockproof Property

As shown in the chart, close the air switch K, cut K2, and turn K1 on and off repeatedly 30 times. The resistance will not open - circuit.

Short Circuit Fusing Characteristic (RXF21 - A)

As shown, close K, K1, and K2. The experimental part will fuse immediately, and the 6A air switch K will not disconnect.

Surge Proof Characteristic (RXF21 - B)

Connect the experimental resistor into a suitable battery charger, and exert a voltage of 1000V - 3000V on the battery charger according to the requirements of the IEC61000 - 4 - 5 test standard (as required by the charger). After the experiment, the resistance will not be open - circuit.

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