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Specifications
Type:
Wirewound Resistor
Resistance:
3.9Ω
Voltage-Supply(Max):
-
Power(Watts):
250mW
Temperature Coefficient:
±350ppm/℃
Tolerance:
±5%
Mfr. Part #:
RXF-1/4W-3.9R-J-T52
Package:
Through Hole,D3xL7mm
Key Attributes
Model Number:
RXF-1/4W-3.9R-J-T52
Product Description
Product Overview
The RXF series from Dongguan Hongda Electronic Technology Co., Ltd. are high-performance resistors designed for a wide range of electronic applications. These resistors offer excellent surge resistance, good fusing consistency, and a compact size for easy installation, ensuring safety and reliability. They are widely used in electronic equipment such as light sources, switching power supplies, chargers, and home appliances.
Product Attributes
- Brand: RXF Series
- Manufacturer: Dongguan Hongda Electronic Technology Co., Ltd.
- Origin: China
- Certifications: VDE (Certificate No.: 40036858), UL/CUL (Certificate No.: E359590), CQC (Certificate No.: 0.5W-CQC13001095211, 1W-CQC13001095213, 2W-CQC13001095221)
Technical Specifications
Dimensions and Lead Lengths
| Model | Rated Power (W) | Dimensions (mm) | Allowable Lead Length* (mm) | Dmax. | Lmax. | H1 | d0.05 |
|---|---|---|---|---|---|---|---|
| RXF 0.25, 0.5S, 1WX | 3.0 | 7.0 | 6070 | 0.380.45 | 1 | ||
| 0.5, 1S, 2WX | 4.0 | 10.0 | 6090 | 0.430.60 | 1.5 | ||
| 1, 2S, 3WX | 5.0 | 12.0 | 6070 | 0.540.72 | |||
| 2, 3S | 6.0 | 16.0 | 6080 | 0.600.72 |
Electrical Characteristics
| Model | Rated Power (W) | Resistance Range () | Resistance Tolerance (%) | Insulation Voltage (V) (DC or AC peak) | Component Limit Voltage (V) |
|---|---|---|---|---|---|
| RXF 0.25, 0.5S, 1X | 0.22-300 | 5, 10 | 250 | 200 | |
| 0.5, 1S, 2X | 250 | 350 | |||
| 1, 2S, 3X | 350 | 350 | |||
| 2, 3S | 0.22-47 | 500 | 350 |
General Data
| Parameter | Specification |
|---|---|
| Nominal Resistance Tolerance | 5%, 10% |
| Climatic Category | 55/155/21 |
| Low Air Pressure | 8.5kpa |
| Stability Grade | 5% |
| Limit Resistance Variation | 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 | I2(A)=P(W)/R() |
| Power Derating Curve | Refer to Figure 2. Rated power is the maximum continuous operating value at 70. Power consumption decreases 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 initial test current. Fusing time is the time from applying overload to fusing. |
| Fusing Time Requirements | Under specified rated current overload multiples, fusing time should comply with tables. (See Table 3-1 for standard and high lightning surge types; Table 3-2 for explosion-proof types; Table 3-3 for semi-fusing types). Fusing time can be custom-made per user requirements. |
| Impact Resistance | Test according to Figure 3. Repeatedly switch K1 ON for 2S and OFF for 2S for 100 cycles. Test resistor should not be open-circuited. (Capacitance C selection based on customer requirements, default C=10uF. Resistance R selection based on circuit, converted to internal resistance, R power rating 20W, power factor 0.8, for resistors under 10W generally take 20W, 5.1K(5%)). |
Main Test Items, Methods, and Performance Requirements
| No. | Test Item | Test Method | Performance Requirements |
|---|---|---|---|
| 1 | Resistance | Measured by resistance error sorter. | 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 and calculate variation rate. | Resistance variation: R(2%R+0.05) |
| 3 | Solderability | Dip lead ends in solder pot at (2605) for 20.5S, depth 2+0/-0.5mm from body. Observe solder coverage. | Over 90% surface coverage in circumferential direction of dipped part. |
| 4 | Voltage Proof | Place resistor in metal 'V' groove, apply specified insulation voltage between lead wires and 'V' groove for 60S. | No visible damage, clear marking; no breakdown, arcing. |
| 5 | Resistance to Soldering Heat | Dip lead ends in solder pot at (35010) for 3.50.5S, depth 2+0/-0.5mm from body. Recover 1h, measure resistance and calculate variation rate. | Resistance variation: R(1%R+0.05) |
| 6 | Rapid Change of Temperature | Cycles of low temp (-553) for 30min, normal temp 2-3min, high temp (1553) for 30min, normal temp 2-3min. Perform 5 cycles, recover 1-2h, measure resistance and calculate variation rate. | Resistance variation: R(1%R+0.05) |
| 7 | Endurance | Place in constant temperature oven at (703), apply rated DC voltage, 1.5h ON, 0.5h OFF cycle for 1000h. Recover 1-4h, measure resistance and calculate variation rate. | Resistance variation: R(5%R+0.1) |
| 8 | Lead Strength | Tensile: 10N for 10S; Bending: Apply 5N load, tilt body approx. 90 in 2-3S, recover, bend in opposite direction (2 bends total). | Resistance variation: R(1%R+0.05) |
| 9 | Vibration | Resistor body 61mm from mounting point. Vibration frequency 10-500Hz, amplitude 0.75mm or acceleration 98m/s (whichever is smaller). Vibration direction Z, X, Y axes for 2h each (total 6h), period 1min (10-55-10Hz). Measure resistance and calculate variation rate after test. | 1) Appearance: No mechanical damage. 2) Resistance variation: R(1%R+0.05) |
| 10 | Climatic Sequence | Dry heat; Cyclic damp heat (Test Db, 1st cycle); Cold; Low pressure; Cyclic damp heat (Test Db, remaining cycles); DC load. | Resistance variation: R(5%R+0.1). Insulation Resistance: 100M. |
| 11 | Accidental Overload | Install sample in single-layer wire mesh cylinder 253mm from resistor body. Apply 5, 10, 16 times rated power overload for 5min or until open circuit. | Wire mesh cylinder does not ignite. |
Taping and Packaging
| Taping Specification | Dimensions (mm) | U | W | P | L1-L2 | T | Z | R | t | T26 |
|---|---|---|---|---|---|---|---|---|---|---|
| 381 | 260.5 | 50.5 | 0.5 | 60.1 | 1 | 0 | 3.2 | 1.5 | ||
| T52 | 642 | 521 | 1 | |||||||
| T63 | 752 | 631 | 100.5 | 1.2 | ||||||
| T72 | 842 | 722 | 50.5 | 1.2 |
Sleeve Product Specifications
| Shape | Dimensions (mm) | H1 | H11.5 | H21.5 | hh (15%) | h12 | h22 |
|---|---|---|---|---|---|---|---|
| TA Type | 70 | 20 | 20 | 50 | 10 | 10 | |
| TB Type | 80 | 5 | 25 | 40 | 10 | 30 |
Note: 1. Tolerance for exposed lead length 5 mm is +2/-1 mm. 2. Sleeve dimensions can be custom-made per customer requirements.
Molded Product Specifications
| Shape | Dimensions (mm) | P1.0 | H1 | h0.5 |
|---|---|---|---|---|
| n Type | 5 | 3.5 | 8 | 3.5 |
| B Type | 5 | 3.5 | 8 | 3.5 |
| L Type | 12.5 | 4.5 | 14.5 | 5.5 |
Note: Molded shape and dimensions can be custom-made per customer requirements.
Model Specification Naming Convention (Example)
| Component | Description |
|---|---|
| RXF | Series Name |
| Rated Power | 0.25w, 0.5w, 1w, 2w, 3w |
| S: Miniaturized, X: Ultra-miniaturized | Type |
| Resistance Tolerance | J: 5%, K: 10%, M: 20% |
| Nominal Resistance | E24 Series (See color code diagram) |
Color Code Marking Diagram
| Color | 1st Digit | 2nd Digit | 3rd Digit | Multiplier | Tolerance |
|---|---|---|---|---|---|
| Black | 0 | 0 | 0 | 10 | |
| Brown | 1 | 1 | 1 | 10 | 1% |
| Red | 2 | 2 | 2 | 10 | 2% |
| Orange | 3 | 3 | 3 | 10 | |
| Yellow | 4 | 4 | 4 | 10 | |
| Green | 5 | 5 | 5 | 10 | 0.5% |
| Blue | 6 | 6 | 6 | 10 | 0.25% |
| Violet | 7 | 7 | 7 | 10 | 0.1% |
| Gray | 8 | 8 | 8 | 10 | |
| White | 9 | 9 | 9 | 10 | |
| Gold | 10 | 5% | |||
| Silver | 10 | 10% | |||
| Plain | 20% |
Packaging Method
- Inner Box Packaging: Taped, 1K/box
- Outer Box Packaging: (Details not provided in source text)
2304140030_Hongda-RXF-1-4W-3-9R-J-T52_C2149596.pdf
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