English
1.Vitreous Enamel Coating – Fused glass-like enamel provides exceptional protection against moisture, salt spray, and industrial contaminants, ensuring long-term reliability in harsh environments .
2.High-Temperature Operation – Continuous operation up to +200°C surface temperature, with excellent thermal shock resistance for demanding applications.
3.Fixed and Adjustable Options – RX20 series offers fixed resistance values for general use; RXG series features adjustable taps for circuit tuning and prototyping.
4.Precision Wirewound Construction – High-stability resistance wire wound on high-purity ceramic tube ensures accurate resistance values and excellent long-term stability.
5.Excellent Dielectric Strength – Tested to AC 2000V for 1 minute, ensuring safe operation in high-voltage circuits.
6.Mechanical Robustness – Rigid ceramic core and hard enamel coating withstand vibration, shock, and thermal cycling without degradation.
7.Wide Resistance Range – From 0.1Ω to 91kΩ, covering diverse applications from current sensing to voltage division.
8.Compact Power Density – Achieves high power ratings in relatively small package sizes, ideal for space-constrained designs.
9.Through-Hole Mounting – Standard lead spacing compatible with PCB mounting; optional bracket mounting available for chassis installation.
10.Custom Configurations – Special resistance values, tolerances, and termination styles available to meet OEM requirements.
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Model Series |
RX20 (Fixed), RXG (Adjustable) |
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Rated Power |
8W – 500W |
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Resistance Range |
0.1Ω – 91kΩ (depending on model and power) |
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Tolerance |
±5%, ±10% (standard) |
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Temperature Coefficient |
±200 ppm/°C to ±400 ppm/°C (typical) |
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Coating Material |
Vitreous enamel (fused glass) |
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Dielectric Strength |
AC 2000V for 1 minute |
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Working Temperature |
-55°C to +200°C (surface) |
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Insulation Resistance |
≥ 100MΩ @ 500V DC |
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Thermal Shock |
-55°C to +200°C, 5 cycles |
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Core Material |
High-purity ceramic tube |
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Termination |
Solder lugs |
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Mounting |
Through-hole / Bracket mount |
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Application |
Application details |
Description |
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Power Supplies |
Bleeder Resistors |
Provides safe discharge of filter capacitors after power-down in high-voltage supplies. |
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Snubber Circuits |
Absorbs transient energy in switching power supplies and inverters. |
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Pre-charge Resistors |
Limits inrush current during power-up of DC link capacitors. |
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Motor Drives & Controls |
Dynamic Braking |
Dissipates regenerative energy from motors during deceleration in VFD applications. |
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Soft-start Resistors |
Limits starting current in large AC motors and industrial machinery. |
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Load Simulation |
Provides resistive loads for motor drive testing and development. |
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Test & Measurement |
Dummy Loads |
Simulates electrical loads during equipment testing and calibration. |
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Current Sensing Shunts |
Precision low-ohm resistors for current measurement in test setups. |
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High-Voltage Dividers |
Voltage divider networks for HV measurement systems. |
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Industrial Controls |
Welding Equipment |
Current limiting and snubber resistors for welding power supplies. |
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Plating Rectifiers |
Load resistors for testing and ballasting in electroplating systems. |
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HVAC Drives |
Braking resistors for large fan and pump variable frequency drives. |
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Transportation |
Railway Systems |
Braking resistors for auxiliary drives and HVAC systems in rail vehicles. |
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Marine Electronics |
Load resistors for shipboard power systems requiring salt-spray resistance. |
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Medical Equipment |
X-Ray Power Supplies |
High-voltage bleeder and load resistors for medical imaging systems. |
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MRI Gradient Amplifiers |
Stable reference loads for gradient amplifier testing. |
RST Electric ensures safe delivery of every Vitreous Enamel Resistor:
● Individual Packaging: Each resistor is wrapped in anti-static bubble film and placed in individual boxes to prevent mechanical damage to the enamel coating.
● Bulk Packaging: For volume orders, resistors are securely packed in corrugated cartons with foam dividers to prevent contact during transit.
● Lead Protection: Terminal leads are protected with foam sleeves to prevent bending or damage.
● Adjustable Tap Protection: For RXG series, adjustable taps are secured to prevent movement during transit.
● Documentation: Packing lists and inspection certificates included with each shipment.
● Freight Options: We offer express courier (DHL/FedEx/UPS) for small quantities, air freight for medium volumes, and sea freight for bulk orders.
All units undergo 100% electrical testing before packaging to ensure they meet specified resistance values and dielectric strength requirements.
● We are a certified Manufacturer based in China, specializing in Vitreous Enamel Resistor production for over 10 years.
● Complete in-house control over ceramic core sourcing, wire winding, enamel coating, and testing – ensuring consistent quality.
● Factory-direct pricing on every Enamel Coated Resistor, with transparent cost structure and no middlemen.
● ISO 9001 certified facilities with dedicated winding and enameling production lines.
● 100% electrical testing (resistance, dielectric, insulation) performed on every unit.
● In-house thermal shock testing to validate enamel adhesion and durability.
● Experienced engineering team specializing in high-reliability resistor applications for harsh environments.
● Proven Supplier to power supply manufacturers, motor drive companies, and industrial equipment producers worldwide.
● Export track record to over 40 countries, including Germany, USA, Japan, South Korea, and Italy.
● Deep domain expertise in applications requiring moisture resistance and long-term stability.
● Power ratings: 8W to 500W (higher available in custom configurations).
● Resistance values: 0.1Ω to 91kΩ (special values available).
● Configurations: Fixed (RX20) or Adjustable (RXG) with movable tap.
● Tolerances: ±5%, ±10% (custom tolerances available).
● Termination styles: Wire leads / Solder lugs / Custom brackets.
● Mounting options: Through-hole / Chassis mount with brackets.
● Standard lead time: 10-20 working days for standard ratings; 20-30 days for custom configurations.
● Comprehensive documentation: Test reports, material certifications.
● 18-month warranty with remote troubleshooting and spare parts dispatch.
● Technical support available for integration with power supplies, drives, and test equipment.
Address
No. 13, North Shore Road, Huangjiang Town, Dongguan City, Guangdong Province, China
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