Product Overview
The RXF series resistors from Dongguan Hongda Electronic Technology Co., Ltd. are designed for reliability and performance in electronic equipment. These resistors offer excellent surge resistance, good fusing consistency, and a compact size for easy installation. They are widely used in electronic devices such as light sources, switching power supplies, chargers, and home appliances. The RXF series has obtained several safety certifications, including VDE, UL/CUL, and CQC.
Product Attributes
- Brand: HONGDA
- Origin: Dongguan, China
- Certifications: VDE, UL/CUL (E359590), CQC
Technical Specifications
General Specifications
Nominal Resistance Tolerance: 5%, 10%
Climatic Category: 55/155/21
Low Pressure: 8.5kPa
Stability Grade: 5%
Resistance Change Limits:
- Long-term test: (5%R + 0.1)
- 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 continuous operating value at 70. Power derating is required above 70 according to the curve (Figure 2).
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 duration from overload application to fusing. This characteristic is detailed in Tables 3-1, 3-2, and 3-3 based on type and rated current multiples.
Impact Resistance: Tested by repeatedly switching a circuit (2s on, 2s off) for 100 cycles without open circuit failure (Figure 3).
Main Test Items, Methods, and Performance Requirements (Table 4)
| No. | Test Item | Test Method | Performance Requirement |
|---|---|---|---|
| 1 | Resistance | Resistance error sorting instrument measurement. | Resistance value within nominal resistance and allowable tolerance. |
| 2 | Short-time Overload | Apply 2.5 times rated voltage for 5s, recover 1-2h, measure resistance, calculate change rate. | Resistance change: R (2%R + 0.05) |
| 3 | Solderability | Dip leads in 2605 solder pot for 20.5s, 2+0/-0.5mm from body. Observe solder coverage. | Over 90% surface coverage in circumferential direction of immersed part. |
| 4 | Voltage Proof | Apply specified insulation voltage between leads and 'V' groove for 60s. | No visible damage, clear marking; no breakdown or arcing. |
| 5 | Resistance to Soldering Heat | Dip leads in 35010 solder pot for 3.50.5s, 2+0/-0.5mm from body. Recover 1h, measure resistance, calculate change rate. | Resistance change: R (1%R + 0.05) |
| 6 | Rapid Temperature Change | Cycles of -553 (30min), room temp (2-3min), 1553 (30min), room temp (2-3min), 5 cycles. Recover 1-2h, measure resistance, calculate change rate. | Resistance change: R (1%R + 0.05) |
| 7 | Endurance | Place in 703 oven, apply rated DC voltage, 1.5h on, 0.5h off, cycle for 1000h. Recover 1-4h, measure resistance, calculate change rate. | Resistance change: R (5%R + 0.1) |
| 8 | Lead Strength | Tensile test: 10N for 10s. Bending test: 5N load, bend 90 in one direction for 2-3s, repeat in opposite direction (2 bends total). | Resistance change: R (1%R + 0.05) |
| 9 | Vibration | Distance from body to mounting 61mm. Vibration 10-500Hz, amplitude 0.75mm or acceleration 98m/s (whichever is smaller). Directions X, Y, Z axes for 2h each (total 6h). Cycle 1min (10-55-10Hz). Measure resistance, calculate change rate. | 1) Appearance: No mechanical damage. 2) Resistance change: R (1%R + 0.05) |
| 10 | Climatic Sequence | Dry heat, cyclic damp heat (Db), cold, low pressure, cyclic damp heat (Db), DC load. | Resistance change: R (5%R + 0.1). Insulation resistance: 100M. |
| 11 | Accidental Overload | Install sample in single-layer wire mesh cylinder (253mm from body). Apply 5, 10, 16 times rated power overload for 5min or until open circuit. | Wire mesh cylinder does not ignite. |
Model and Specification Naming Convention (Example)
| Component | Description |
|---|---|
| RXF | Series Name |
| 1W | Rated Power (0.25W, 0.5W, 1W, 2W, 3W) |
| S | Miniaturization (S: Small, X: Extra Small) |
| 10J | Nominal Resistance (E24 series) and Tolerance (J: 5%, K: 10%, M: 20%) |
| Color Code | (See diagram for First Digit, Second Digit, Third Digit, Multiplier, Tolerance) |
Packaging
Inner Box Packaging: 1K/box (Taped)
Outer Box Packaging: (Details not fully specified, refer to Tables 5 & 6 for tape and sleeve dimensions).
2304140030_Hongda-RXF-2WS-10R-J-T52_C2149617.pdf
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