Micro-Ohm Power Resistors- Series HS

product guide


Power Resistor - Series HS (Heat Sink) 5W to 250W

FEATURES:

Aluminum Finned Heat Sink Case

- Molded Construction

Screw Mounts on Chassis

- Complete Welded Construction

Heavy Spade lug type leads

- High Stability at Conventional Power Ratings

ELECTRICAL SPECIFICATIONS:

Models: 5, 10, 25 and 50 watts

- Resistance Range: .05 ohms to 200K ohms

Tolerances: .05% to 10%

- Temperature Coefficient: 20PPM to 90PPM

Dielectric Strength: 1000 VAC min.

- Non-inductive available: add letter N after P/N

POWER RANGE: HS resisitor ratings are based on the following (2) requirements:

(1) 275°C max. internal hotspot temp.

(2) 1% max.

R in 1000 hour load life for all models.

DERATING: HS resistors have an operating temperature range of -55° to +275°C. Derating is required for reduced chassis mounting area and for high ambient temperature.

Dimension Shown in Inches. Conversion to M.M. = Inch x 25.4

M-O P/N	MIL-PRF 18546	Com'l Watt	Max. Working Voltage	Max. Res.	A ±.005	B ±.005	C ±.032	D ±.062	E ±.015
HS5	RE60	5	160	20K	.444	.490	.600	1.125	.334
HS10	RE65	10	265	30K	.562	.625	.750	1.375	.438
HS25	RE70	25	550	75K	.719	.781	1.062	1.938	.500
HS50	RE75	50	1250	200K	1.563	.844	1.968	2.781	.625

M-O P/N	F ±.015	G ±.015	H ±.010	J ±.010	K ±.010	L ±.005	M ±.015	N ±.005	Mounting Hole Size
HS5	.646	.317	.075	.145	.078	.093	.078	.050	#2
HS10	.812	.406	.100	.203	.093	.093	.094	.086	#2
HS25	1.094	.563	.094	.250	.171	.125	.125	.086	#2
HS50	1.156	.625	.094	.281	.196	.125	.125	.086	#4

70 to 250 Watt Resistor

Chassis mount units are designed for maximum heat dissipation mounting solidly to metal chassis surface for maximum heat transfer. They are outstanding for their high power dissipation with precision tolerances in minimum physical sizes.

Electrical Specifications

Resistance Range -.05 ohms to 50K ohms

Tolerance - 5%, 3%, 1%, .5%, .25%, .1%, .05%

Temperature Coefficient - ± 20 to 90 PPM

General Specifications

Lower hot spot ratings due to exclusive complete encapsulation of element within anodized aluminum body.

Welded construction throughout assures long stable load life.

Threaded heavy stud terminals

Temperature range -> -55°C to + 275°C

5500 VAC minimum dielectric strength

DIMENSIONS
M-O P/N	MIL-PRF 18546	Com'l Watts	Max. Working Voltage	Max. Res.	A ±.01	Aa ±.01	B ±.01	C ±.094	D ±.094	E Ref
HS70	-	70	1400	275K	2.63	-	0.84	2.968	3.781	0.625
HS100	RE77	100	1900	50K	2.75	-	2.25	3.500	5.478	1.800
HS180	-	180	2100	50K	2.77	-	2.50	3.500	5.478	2.125
HS250	RE80	250	2300	45K	3.88	3.00	2.50	4.500	7.000	2.125

M-O P/N	F ±.031	G ±.031	H ±.016	J Ref.	K ±.031	L ±.01	M Ref.	N -	P ±.01	Screw Size
HS70	1.156	0.625	0.094	0.281	0.196	0.125	0.125	0.09	-	-
HS100	2.813	1.750	0.188	0.800	0.375	0.188	0.250	12/24	-	#8
HS180	3.000	2.188	0.250	0.950	0.375	0.188	0.200	12/24	-	#8
HS250	3.000	2.188	0.250	1.000	0.312	0.188	0.200	1/4/20	1.180	#8

DERATING

Power Rating
HS resistor curve D shown above is based on mounting to the following heat sink:
HS 5 & 10	4" x 6" x 2 .040" thick aluminum chassis (129 sq. in. surface area)
HS 25	5" x 7" x 2 .040" thick aluminum chassis (167 sq. in. surface area)
HS 50	12" x 12" x .059" thick aluminum panel (291 sq. in. surface area)
HS 100 & 250	12" x 12" x .125" thick aluminum panel (294 sq. in. surface area)

ORDERING INFORMATION

Example: 10W 10 ohm 5%

HS10	10R0	J
Type	Resistance	Tolerance
	4 digit. <100 use R for decimal. >100 4th digit is multiplier	J = 5% F = 1% D = .5% C = .25% B = .1% A = .05%
For Non-Inductive add "N" after Type

TO ORDER PRODUCT

E mail: microohm@mail.com

Call Toll Free: 1-800-845-5167

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