Film Resistors, buy HMF High Precision flammeproof Metal Film Fixed Resistors on China Suppliers Mobile

Product Details

LMF HMF LCM HCM High Precision flammeproof Metal Film Fixed Resistors

Nonflammabe Metal Film Resistors(LMF/HMF/LCM/HCM)

Features:

1, Low temperature coefficient, high precision, and good high frequency performance.

2, Operating ambient temperature:-55 to +155.

3,Film the metal in Vacuum with the good waterproof.

4, The surface is nonflammable, the normal size coating is brick red and the small size coating is green.

5, Resistance tolerance:±1%,±5%.

Performance Test:

Test Item Test Condition Performance

Temperature coefficient ±350ppm/

Short time overload R≤±(1%R₀+0.05R)

Pulse overload R≤±(2% R₀+0.05R)

Resistance to soldering heat R≤±(1% R₀+0.05R)

Solerability The soldering area is over 95%

Temperature cycling R≤±(1% R₀+0.05R)

Load life in humidity R≤±(5% R₀+0.05R)

Load life in heat R≤±(5% R₀+0.05R)

Nonflammability No visible flame.

A, High heat exchanged Ceramic core.

B, High stability Electric conduction film.

C, Iron Cap.

D, Silicon resin coating.

E, Color Ring.

F, Tinned copper lead wire or CP lead wire.

Dimensions and Voltage Performance:

Performance Test:

Test Item	Test Condition	Performance
Temperature coefficient	Test the resistance value at normal temperature and normal temperature added 100℃,calculate per℃ resistance value change rate .	±350ppm/℃
Short time overload	2.5 × rated voltage or Max.overload voltage (get the lower) for 5 seconds.	ΔR≤±(1%R0+0.05Ω)
Pulse overload	At 4 × rated voltage or Max. pulse overload voltage (get the lower) cycle 10000±200 times(1 second on, 25 seconds off ).	ΔR≤±(2%R0+0.05Ω)
Resistance to soldering heat	Immerge into 350±10℃ tin stove for 2~3 seconds.	ΔR≤±(1%R0+0.05Ω)
Solderability	Immerge into 245±3℃ tin stove for 2~3 seconds.	The area of soldering is over 95%
Temperature cycling	At -55℃ for 30 min, then at +25℃ for 10~15 min, then at +125℃ for 30 min, then at +25℃ for 10~15 min, total 5 cycles.	ΔR≤±(1%R0+0.05Ω)
Load life in humidity	Overload rated voltage or ing voltage (get the lower) for 1000 hours (1.5 hours on and half-hour off ) at the 40±2℃ and 90~95% relative humidity.	ΔR≤±(5%R0+0.05Ω)
Load life in heat	Overload rated voltage or ing voltage (get the lower ) for 1000 hours (1.5 hours on and half-hour off) at the 70±2℃.	ΔR≤±(5%R0+0.05Ω)
Nonflammability	Respectively load AC voltage by 5,10,16 times rared power for 5 minutes.	No visible flame