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Specifications
Tolerance:
±25%
Temperature Coefficient:
±250ppm/℃
Power(Watts):
150mW
Resistance:
300kΩ
Mfr. Part #:
VGF39NCHXT-B304
Package:
SMD-3P,3.8x3.7mm
Key Attributes
Model Number:
VGF39NCHXT-B304
Product Description
HOKURIKU ELECTRIC INDUSTRY CO., LTD. - VGF39NCHXT HDK Type Variable Resistor
Product Overview
The HOKURIKU ELECTRIC INDUSTRY CO., LTD. VGF39NCHXT is a 3mm chip trimmer potentiometer featuring a Metal-Glaze-Resistor. Designed for general electronic equipment, this variable resistor offers a nominal total resistance range from 100 to 1 M with a tolerance of 25%. It operates within a wide temperature range of -40 to +100 and is suitable for applications requiring precise resistance adjustment.
Product Attributes
- Brand: HOKURIKU ELECTRIC INDUSTRY CO., LTD.
- Type: HDK VGF39NCHXT
- Resistor Type: Metal-Glaze-Resistor
- Origin: CHINA (Manufactured by DANDONG NEW LAND ELECTRONIC Co., Ltd.)
- Certifications: RoHS Compliant
Technical Specifications
| Specification | Value | Details |
|---|---|---|
| Model Number | VGF39NCHXT | |
| Type | 3mm Chip Trimmer Potentiometer | With Metal-Glaze-Resistor |
| Application | General Electronic Equipment | |
| Operating Temperature Range | -40 to +100 | |
| Storage Temperature Range | -40 to +100 | |
| Nominal Total Resistance Range | 100 to 1 M | Refer to Application List for series 1, 2, 3, 5, E |
| Total Resistance Tolerance | 25 % | |
| Rated Power | 0.15 W (@ +70 ) | Power derating curve vs. ambient temperature applies |
| Rated Voltage | E=PR | When rated voltage exceeds max. operating voltage, max. operating voltage is applied. |
| Maximum Operating Voltage | 50 V | |
| Mechanical Rotation | 270 20 | |
| Rotational Torque | 0.98 mNm to 11.76 mNm | |
| Push Load | 9.8 N | Applied axially for 30 seconds |
| Torsion Moment | 14.7 mNm | Applied to spindle for 5 seconds |
| End Stop Strength | 14.7 mNm | Applied to spindle for 5 seconds |
| Soldering Strength | 9.8 N (Lateral), 4.9 N (Upward) | Applied for 30 seconds after soldering |
| Contact Resistance (Total resistance 1 k) | 5 % of nominal total resistance | |
| Contact Resistance (Total resistance > 1 k) | 2 % of nominal total resistance | |
| Residual Resistance (1-2 or 2-3) | 20 | For total resistance 1 k |
| Residual Resistance (1-2 or 2-3) | 2 % of nominal total resistance | For total resistance > 1 k |
| Ineffective Rotation | 10 % of total mechanical rotation | At each end |
| Temperature Coefficient of Resistance (T.C.R.) | 250 ppm/ | Measured at specific temperatures |
| Load Life | 1000 h 12 h at 70 2 | Change in total resistance 5 % |
| Vibration Resistance | 1.5 mm amplitude, 10 Hz - 55 Hz - 10 Hz cycle for 2h per axis (X, Y, Z) | Change in resistance between 1-2 5 %; No distinct looseness or poor contact |
| Resistance to Soldering Heat | Peak Temp. 260 (10s), Application Time 230 (40s) | Change in resistance between 1-2 5 %; No instant open |
| High Temperature Storage | 1000 h 12 h at 70 2 | Change in total resistance 2 %; No distinct looseness or poor contact |
| Humidity Load Life | 1000 h 12 h at 40 2 , 90-95% RH | Change in total resistance 5 % |
| Humidity Resistance | 1000 h 12 h at 40 2 , 90-95% RH | Change in total resistance 5 %; No distinct looseness or poor contact |
| Temperature Cycle Durability | 5 successive cycles as specified | Change in total resistance 2 %; No distinct looseness or poor contact |
| Rotational Life | 20 cycles 2 cycles at 10 min (90% of total rotation) | Change in total resistance 10 % |
| Preset Position (Delivery) | 50% 15% of total rotation angle | |
| Taping Quantity | 2,500 pcs/reel (excluding fractions) |
Materials
| Part Name | Base Material | Plating | Remarks |
|---|---|---|---|
| Board | CERAMIC (Al2O3) | ||
| Resistor | METAL GLAZE COATING | ||
| Electrode | AgPd | ||
| 1st, 3rd Terminal | STEEL | Under Plating: Ni (0.5-2 m), Surface Plating: Sn (2-4 m) | |
| 2nd Terminal | STEEL | Under Plating: Ni (0.5-2 m), Surface Plating: Sn (2-4 m) | |
| Moving Contact | STAINLESS STEEL | ||
| Sealing Resin | ACRYLIC | SOLDER (Sn-3Ag-0.5Cu) Lead-free solder |
Application Notes
- Recommended for reflow soldering; flow soldering is not supported.
- Avoid excessive force when adjusting resistance; use a driver perpendicular to the operating shaft.
- Handle with care to prevent flux and solder scattering on the resistor surface and sliding contact.
- The product is not washable.
- Do not use adhesives for fixing the slider, as it may cause contact instability.
- Excessive soldering time or temperature can impair product function.
- For reflow soldering, cream solder thickness should be 100-150m. Ensure appropriate solder amount to avoid insufficient bonding or solder bridges.
- If wiring patterns are located directly beneath the product after mounting, ensure insulation measures (e.g., using resist).
- Refer to EIAJ RCR-2191A for potentiometer usage guidelines.
- For applications requiring high reliability and safety, implement fail-safe designs (e.g., protective circuits, redundant circuits).
Product Storage Conditions
- Recommended storage: Normal temperature (5 to 35 ), Normal humidity (45% to 85% RH).
- Storage period: 6 months from delivery.
- Store in original packaging, avoiding stress on the product. Handle opened items with moisture and gas protection.
- Avoid storage under direct sunlight or in corrosive gas atmospheres.
2411220546_HDK-VGF39NCHXT-B304_C22461626.pdf
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