Product Overview

The RXF series resistors from Dongguan Hongda Electronic Technology Co., Ltd. are designed for excellent surge resistance and good fusing consistency. These compact, easy-to-install, and reliable components are widely used in electronic equipment such as light sources, switching power supplies, chargers, and home appliances. The series has obtained VDE, UL/CUL, and CQC safety certifications.

Product Attributes

• Brand: RXF Series
• Manufacturer: Dongguan Hongda Electronic Technology Co., Ltd.
• Origin: China
• Certifications: VDE, UL/CUL (Cert No.: E359590), CQC (Cert No.: 0.5W-CQC13001095211, 1W-CQC13001095213, 2W-CQC13001095221)

Technical Specifications

General Data

• Nominal resistance tolerance: 5%, 10%
• Climatic category: 55/155/21
• Low air pressure: 8.5kpa
• Stability grade: 5%
• Resistance change limit: 5.1 Long-term test: (5%R+0.1); 5.2 Short-term test: (1%R+0.05)
• Temperature coefficient: Standard type 350 ppm; Semi-fusing type, explosion-proof type, high lightning surge type: 35001500 ppm
• Rated current: I(A) = P(W)/R()
• Derating curve: Rated power is the maximum value for continuous operation at 70. Power consumption is derated according to the curve when exceeding 70.
• Fusing characteristic: Defined as significant increase in resistance when subjected to specified overload, causing current to drop below 1/50 of the initial test current. Fusing time is the time from application of overload to fusing.
• Fusing time requirements under specified rated current overload conditions:
• Standard and High Lightning Surge Type (Table 3-1):
• 0.25W R1: 30S (6x rated current); R1: 30S (7x rated current)
• 0.5-2W R1: 30S (6x rated current); R1: 30S (6x rated current)
• Explosion-proof Type (Table 3-2): (Details not provided in excerpt)
• Semi-fusing Type (Table 3-3): (Details not provided in excerpt)
• Surge resistance performance: Test involves repeated closing and opening of switch K1 for 100 cycles (2S ON, 2S OFF). Test resistor should not become open circuit.
• Major test items, test methods, and performance requirements (Table 4):
• Resistance: Within nominal resistance and allowable deviation.
• Short-time overload: 2.5x rated voltage for 5S, resistance change R(2%R+0.05).
• Solderability: Over 90% circumferential coverage of solder on the immersed part.
• Voltage proof: No visible damage, clear marking, no breakdown or arcing.
• Resistance to soldering heat: Resistance change R(1%R+0.05).
• Rapid temperature change: Resistance change R(1%R+0.05).
• Endurance: Resistance change R(5%R+0.1).
• Lead strength: Resistance change R(1%R+0.05).
• Vibration: No mechanical damage; Resistance change R(1%R+0.05).
• Climatic sequence: Resistance change R(5%R+0.1); Insulation resistance 100M.
• Accidental overload: Silk screen cylinder does not catch fire.

Packaging and Marking

• Taped style and dimensions (Figure 4, Table 5): Various tape specifications (T26, T52, T63, T72) with corresponding dimensions.
• Sleeved product style and dimensions (Figure 5, Table 6): TA and TB types with specified dimensions.
• Molded style and dimensions (Figure 6, Table 7): N, B, and L types with specified dimensions.
• Model specification name explanation: Example: RXF 1W S 10 J. Includes rated power, resistance tolerance (J: 5%, K: 10%, M: 20%), nominal resistance (E24 series), miniaturization indicators (S: small, X: ultra-small), and color band marking system.
• Packaging method: Inner box: 1K/reel. Outer box packaging.