Power Precision Wirewound Resistors (KNP-R)

Add To Inquiry Page

Wire Wound Resistors (KNP-R)

Power Wire Wound Resistors Boast Consistent Precision Power Operation.

DeMint’s highest quality conformal axial terminal ceramic-silicone coated KNP-R power resistors for applications requiring high stability and precision. The KNP-R wire-wound has a low temperature coefficient and maintain a high degree of stability under demanding conditions.

The power precision KNP-R series meeting MIL-R-26E (U and V characteristics) and surface temperature (hot spot) 375°C max. Resistors with a wide range of 0.01Ω ~ 82kΩ, covering applications from precision to power. Products with lead-free terminations meet EU RoHS and China RoHS requirements.

Characteristics U :
275°C Maximum hot spot temperature. 1% Maximum ΔR in 1000 hours load life.

Characteristics V :
375°C Maximum hot spot temperature. 3% Maximum ΔR in 1000 hours load life.

Operating temperature range is -55°C ~ +375°C and derated power at high ambient temperatures as according to the chart below. DeMint is equipped to design and produce custom components to meet many design and reliability demands. In addition to standard military-grade resistor products, we also have many resistive products designed to meet various source-controlled drawings.

Download complete PDF Wire Wound Resistors (KNP-R).

Features :

Excellent load life stability
High Precision and reliability
Axial ceramic-silicone coated
Meets the Standards of MIL-R-26E
RoHS compliant with 100% lead free

Applications :

Radar, Ground Vehicles
Communications systems
Bias supply, Current shunts, Voltage dropping
Motor speed controls, Voltage divider networks
Medical instrumentation and Medical implantables

Technical Specifications (KNP-R)

Type	MIL - R-26E	Power Rating (W)		Max. Working Voltage (V)		Resistance Range (Ω)		Dimensions (Unit: mm)
Type	MIL - R-26E	U	V	U	V	0.1% 0.25% 0.5%	1% 2% 3% 5%	L ± 0.81	D ± 0.81	d ± 0.1
KNP-R1/4	-	0.40	-	20	-	10~950	1~3.4K	6.35	1.98	0.51
KNP-R1/2	RW70	0.75	-	29	-	10~1.3K	1~4.9K	7.92	1.98	0.51
KNP-R1A	-	1.00	-	53	-	1~2.7K	0.1~10.4K	10.31	2.36	0.64
KNP-R1	RW69	1.10	-	62	-	1~4.0K	0.1~15K	13.49	2.36	0.64
KNP-R2A	-	2.50	3.25	138	157	1~8.6K	0.01~32.3K	12.70	5.33	0.81
KNP-R2	RW79	3.00	3.75	135	148	1~5K	0.01~2K	13.49	4.06	0.81
KNP-R3A	-	3.00	3.75	135	148	1~6.5K	0.01~34.5K	14.27	5.33	0.81
KNP-R3	-	3.25	4.75	185	220	1~11.4K	0.01~42.1K	20.62	5.33	1.02
KNP-R4	RW67	4.00	5.50	210	250	1~12.7K	0.01~47.1K	15.88	7.62	1.02
KNP-R5	RW74	5.00	6.50	330	376	0.5~24.5K	0.01~51K	22.22	7.62	1.02
KNP-R7	RW68	7.00	9.00	504	576	0.5~41.4K	0.01~75K	30.94	9.52	1.02
KNP-R10	RW78	10.00	13.00	799	911	0.5~71.3K	0.01~82K	45.21	9.52	1.02
Temperature Coefficient: 1 Ω and below ± 150 ppm/°C, 1 Ω to 9.9 Ω ± 100 ppm/°C, 10 Ω and above ± 100 ppm/°C, (50 ppm/°C on request)

Electrical Performance (KNP-R)
Test Items	Test Method	Specifications
Short Time Overload	2.5 times of rated voltage 5 sec.	ΔR±(2%+0.05Ω)
Rated Load	Rated wattage 30 minutes.	ΔR±(1%+0.05Ω)
Voltage Withstanding	500VAC 1 minute.	ΔR±(1%+0.05Ω)
Insulation Resistance	500V	20MΩ
Temp. Cycle	-20°C ~ 85°C 5 cycles	ΔR±(1%+0.05Ω)
Soldering After Resistance	235°C for 3 sec	ΔR±(0.5%+0.05Ω)
Incombustibility	16 times of rated wattage for 5 min.	Not flamed
Load Life	+25°C, 1.5Hrs on ~ 0.5Hrs off cycle, 1000 Hrs.	U: ΔR±(1%+0.05Ω) V: ΔR±(3%+0.05Ω)