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PFE and PFR Series

Powr-Rib^® Series Edgewound and Round Wire

Designed in both Edgewound and Round Wire formats, these rugged resistors can handle 700 to 1000 Watts of power. Specify our Edgewound design for very low resistance and high power capacity. When higher resistance with lower power capacity is required use our Round Wire design. These resistors are constructed of a heavy resistance alloy mounted on ceramic insulators and supported by a metal mounting bracket. Metal parts, except for the resistance element, are heavily plated to prevent oxidation at high operating temperatures and to prevent corrosion. The mounting bar is slotted on each end to facilitate installation. Edgewound units provide clamp-type terminals, permitting a reliable connection which can be moved along the resistive element to obtain intermediate values.

SPECIFICATIONS Electrical Current Rating: Continuous duty as listed Wattage Rating: 700 to 1,000 (up to 1,600 watts on special order) Resistance Tolerance: ±10% standard, ±5% available Terminals: Clamps, movable along resistor wire for setting intermediate resistance values on Edgewound units (current must be derated in proportion). Temperature Coefficient: ±300 ppm/°C for resistors 50 amps and more; ±500 ppm/°C for resistors 47 amps or less Ohmic Values: See chart Mounting: Metal mounting bar is slotted on each end to facilitate installation. Short Term Overload: 10 times rated wattage for five seconds DERATING

HOW TO ORDER

ELECTRICAL INFORMATION

Key:
B = Standard values
C = Non-standard values subject to minimum handling charge per item

	Size* (number of insulator segments long)
	2	3	4	5 (standard size)				6	7	8
Dim. A (in./mm)	8.875 (225.425)	11.875 (30.163)	14.875 (377.825)	17.875 (454.025)				20.875 (530.225)	23.875 (606.425)	26.875 (682.625)
Dim. B (in./mm)	7.250 (184.150)	10.250 (31.750)	13.250 (336.550)	16.250 (412.75)				19.250 (488.950)	22.250 (565.150)	25.250 (641.350)
	Ohms	Ohms	Ohms	Ohms	Avail.	Part No.	Watts	Ohms	Ohms	Ohms	Max. Amps
080 and 030 types Edgewound "Powr-rib" Resistors	0.033	0.057	0.080	0.100	B	PFE5KR100E	1000	0.120	0.140	0.160	100
	0.040	0.070	0.100	0.120	C	PFE5KR120E	994	0.140	0.160	0.180	91
	0.046	0.078	0.110	0.140	B	PFE5KR140E	1100	0.170	0.200	0.230	89
	0.052	0.088	0.120	0.160	C	PFE5KR160E	973	0.190	0.220	0.250	78
	0.060	0.100	0.140	0.180	C	PFE5KR180E	1012	0.210	0.250	0.300	75
	0.070	0.120	0.180	0.220	B	PFE5KR220E	1017	0.260	0.300	0.340	68
	0.080	0.130	0.190	0.250	B	PFE5KR250E	992	0.300	0.350	0.400	63
	0.100	0.160	0.230	0.300	C	PFE5KR300E	975	0.360	0.420	0.480	57
	0.110	0.180	0.250	0.330	B	PFE5KR330E	962	0.400	0.470	0.540	54
	0.120	0.200	0.280	0.370	B	PFE5KR370E	925	0.450	0.530	0.610	50
	0.170	0.280	0.380	0.500	B	PFE5KR500E	1105	0.600	0.700	0.800	47
	0.210	0.330	0.460	0.600	B	PFE5KR600E	1109	0.720	0.850	0.980	43
	0.230	0.360	0.510	0.670	B	PFE5KR670E	1126	0.800	0.930	1.06	41
	0.260	0.420	0.580	0.750	B	PFE5KR750E	1141	0.900	1.05	1.20	39
	0.350	0.560	0.770	1.00	B	PFE5K1R00E	1089	1.20	1.40	1.60	33
	0.450	0.730	1.00	1.30	B	PFE5K1R30E	1093	1.50	1.75	2.00	29
	0.560	0.900	1.20	1.60	B	PFE5K1R60E	1082	1.90	2.20	2.50	26
	0.690	1.20	1.70	2.20	B	PFE5K2R20E	745	2.70	3.10	3.50	18.4
	0.880	1.50	2.20	2.80	B	PFE5K2R80E	744	3.40	4.00	4.60	16.3
	1.10	1.90	2.70	3.50	B	PFE5K3R50E	746	4.30	5.10	5.90	14.6
	1.40	2.40	3.50	4.50	B	PFE5K4R50E	726	5.50	6.50	7.50	12.7
	1.70	2.90	4.20	5.40	B	PFE5K5R40E	752	6.60	7.80	9.00	11.8
	2.10	3.70	5.30	6.80	B	PFE5K6R80E	721	8.30	9.80	11.3	10.3
	2.70	4.60	6.50	8.50	B	PFE5K8R50E	751	10.40	12.3	14.2	9.4
080 and 030 types Round-Wire "Powr-rib" Resistors	3.4	5.9	8.5	11.0	B	PFR5K11R0E	757	13.5	16.0	18.5	8.3
	4.1	7.1	10.0	13.0	B	PFR5K13R0E	750	15.9	18.8	21.7	7.6
	5.3	9.2	13.0	17.0	B	PFR5K17R0E	740	20.8	24.6	28.4	6.6
	6.3	10.9	15.4	20.0	B	PFR5K20R0E	696	24.5	29.0	33.5	5.9
	7.9	13.6	19.3	25.0	B	PFR5K25R0E	650	30.7	36.4	42.1	5.1

*Order non-standard sizes, or variations, by length, and ohms. Two terminals supplied as standard unless otherwise specified.
All values for reference only; Consult factory for details.