Aluminium High Frequency Resistors

Product Description

 Aluminium High Frequency Resistors are wound with Nickel Copper or Nickel Chromium wire for obtaining required resistance on a ceramic core fitted with end caps. The winded assembly is then encapsulated in a anodised Heat sink using high temperature moulding compound.

Features of Aluminium High Frequency Resistors 

Application

These Resistors are applied where high wattage dissipation is required in a small space. The metal heat sink ensures good heat dispersal & allows a low hot-spot temperature. Major application include Induction furnace, Medical equipments, Humidity Chambers etc.

Technical Specifications

• Power Rating:  5 Watts to 250Watts
• Terminations: L Screws for 100 - 250W
• Temp Coeff: + 50PPMto 200PPM
• Tolerance:  + 10%, Closer tolerances available.
• Dielectric Voltage:  1000 VAC for5W&10W, 1500 VAC for 25W&200W 2000 VAC for 250W
• Operating temp: -55^oC to 250^oC
• De ratings: De ratings required for reduced chassis mounted area and for high ambient temperatures.
• De rate to zero Power Linearly at 250°C ambient.
• De rating necessary for unmounted resistors at ambient temperatures of 25°C,  5W & 10W - 40%, 25W-50% 50W & above 60%.

DIMENSIONS & RANGE

D i m e n s i o n s i n M . M .																	Dimensions M.M. for Aluminium Heatsink			Resistance Range
Watts	A ±1.0	B ± 0.25	C Max 4.0	D ± 0.25	E ± 1.60	F ± 1.00	G ± 1.00	H ± 0.80	l ± 0.25	J ± 0.80	K ± 0.13	L Max	M ± 1.60	N ± 0.50	P ± Min	Q ± 0.13	R	S	T
5	28.6	12.5	2.00	11.3	15.3	6.80	8.50	12.5	-	16.4	2.40	8.20	3.40	1.70	1.60	1.30	100	100	2.0	0.1W-500
10	34.9	15.9	2.40	14.3	19.1	7.90	10.7	15.9	-	20.4	2.40	9.90	4.20	1.90	2.00	2.00	100	100	2.0	0.1W-1K
25	50.0	20.0	4.40	18.3	27.0	11.2	14.0	20.0	-	27.5	3.18	14.0	5.90	1.90	2.00	2.00	150	150	1.5	0.1W-5K
50	71.0	21.4	5.00	39.8	50.0	11.2	16.0	21.4	-	29.0	3.18	15.5	7.90	2.25	2.00	2.00	150	150	3.0	0.1W-10K
100	95.0	37.0	15.0	35.0	65.0	15.0	26.0	37.0	-	47.0	5.00	26.0	11.0	3.50	4.00	-	150	200	3.0	0.1W-20K
150/200	139	57.0	9.50	70.0	89.0	25.0	46.0	57.0	-	73.0	5.00	45.0	20.0	5.00	5.00	-	150	300	3.0	0.1W-35K
250/300	178	63.5	8.00	98.4	115	32.0	54.0	63.5	76.0	76.0	5.00	56.0	25.0	5.00	6.00	-	300	300	3.0	0.1W-50K

R = Length, S = Width, T = Thickness
value & wattages lower & higher than specified available.
Non - inductive type available

 

Technical specification

Dielectric Voltage	1000 VAC for 5W & 10W,1500 VAC for 25 W & 200W,2000 VAC for 250 W
Power Rating	25-600 Watt
Operating Temp	-55-250 Degree C
Type	AHR
Terminations	Lugs for 5-50 W,Screws for 100-250 W
Temp Coeff	+- 50 PPM to 200 PPM
Overload	5 x wattage rating for 5 sec.
Insulation Resistance	Greater Than 20 M Ohms

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