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KWX Fusible Resistors RFU

Product catalog summary

Overview: The document provides technical specifications and performance details for RFU and RFS fusible resistors manufactured by Shenzhen KWX Electronics Co., Ltd. These resistors are designed to function as standard resistors under normal conditions and offer quick fusing to protect circuits from overloads. They are compliant with UL 1412 and EU-RoHS standards.

Specifications:

Dimensions and weights are specified for different resistor types, ranging from RFU 1/6 to RFU 2 and RFS 1/4 to RFS 3.
Lead wire, cap, ceramic base, helical cutting groove, film, marking or color code, and insulation coat are the main construction features.

Performance and Ratings:

Resistance range varies from 0.1Ω to 33KΩ depending on the type.
Maximum working voltage ranges from 100V to 350V, with overload voltages up to 500V.
Dielectric withstanding voltage and temperature coefficient of resistance (T.C.R) are specified.

Fusing Characteristics:

Fusing time is specified as a maximum of 60 seconds for various resistance ranges and power ratings.
Residual resistance is at least 100 times the nominal resistance.

Performance Tests:

Tests include resistance, T.C.R, short time overload, load life, load life in humidity, moisture resistance, temperature cycle, solderability, and resistance to soldering heat.
Performance requirements are detailed, including specified tolerances and test methods according to JIS C 5201-1 standards.

Ordering Information:

Series name, power rating, resistance tolerance, and resistance value are provided for ordering.

Catalog excerpts

r® RFU Fusible Resistor RFS Fusible Resistor 0 Features I Function as a resistor in normal operation condition. □ Quick fusing protects circuit from excessive over load. ^Approvals awarded; UL 1412 File No.E341249. IVProducts meet EU-RoHS. % Dimensions Type Series Name Power Resistance Resistance Rating Tolerance

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■® RFU Fusible Resistor (standard Type) RFS Fusible Resistor (small Type)

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