Non-inductive Metal Plate Resistor

What advantages does it have in high-frequency circuits?

The Non-inductive Metal Plate Resistor from RST Electric addresses a critical need in modern power electronics: the requirement for low-inductance, high-pulse-capable resistors that do not introduce phase shift or voltage spikes in fast-switching circuits. Unlike conventional wirewound resistors that inherently possess significant inductance due to their coiled element, this Low Inductance Resistor employs a planar metal plate element that minimizes magnetic fields and parasitic inductance, making it ideal for snubber circuits, current sensing in switching power supplies, and output networks in high-frequency amplifiers.

How can resistors with stable performance be manufactured?

The construction of this Metal Plate Resistor emphasizes both electrical performance and mechanical reliability. The resistive element consists of a precisely etched or stamped metal alloy plate, chosen for its low temperature coefficient and excellent pulse-handling characteristics. This element is encapsulated in an inorganic silica filler and housed in a flame-retardant ceramic case, ensuring thermal conductivity, electrical isolation, and protection against environmental stress. The MPR series offers two basic configurations: single-element units (2W, 3W, 5W, 10W) for standard applications, and multi-element combined units (2+2, 3+3, 5+5, 7+7) that integrate two matched resistors in a single package, saving board space and ensuring consistent thermal tracking for differential sensing or push-pull circuits.

How can compliance with industrial standards be ensured?

Electrical performance is validated through rigorous testing. Overload testing is conducted at 2.5× rated power for 5 seconds (lower than wirewound due to the planar structure, reflecting its intended use in steady-state sensing rather than high-energy braking). Temperature coefficient is maintained at ≤ ±250 ppm/°C, ensuring stable readings across operating conditions. Endurance testing at rated voltage for 1000 hours confirms long-term reliability. As a trusted Non-inductive Metal Plate Resistor manufacturer in China, RST Electric combines over 10 years of power resistor engineering expertise with precision manufacturing to deliver components that provide accurate, low-distortion performance in high-frequency and pulsed-power applications.

Technical Specification

Performance Test Data

Product Advantages

1.Non-Inductive Construction – Planar metal plate element minimizes parasitic inductance, enabling use in high-frequency circuits (e.g., switching power supplies, RF amplifiers) without introducing phase shift or voltage overshoot.

2.Ultra-Low Resistance Capability – Available from 0.01Ω, making Non-inductive Metal Plate Resistor ideal for high-current sensing, shunt applications, and low-ohmic power distribution.

3.Low Temperature Coefficient – ≤ ±250 ppm/°C ensures stable resistance values across the operating temperature range for accurate current measurement.

4.Flame-Retardant Ceramic Housing – Encapsulated in inorganic silica filler within a ceramic case for excellent heat dissipation and electrical insulation.

5.Dual-Element Combined Packages – Unique 2+2, 3+3, 5+5, and 7+7 configurations offer two matched resistors in one housing, saving PCB space and ensuring thermal tracking for differential sensing or push-pull circuits.

6.High Pulse Capability – Engineered to withstand 2.5× rated power for 5 seconds, suitable for inrush current limiting and snubber applications.

7.Precision Tolerances – Available from ±1% to ±10% to meet tight circuit requirements.

8.Compact Package – Low profile (5mm height) and small footprint enable high-density PCB layouts.

9.Robust Lead Strength – 10N pull test ensures reliable through-hole mounting and solder joint integrity.

10.Customizable Forming – Lead forming and custom dimensions available to suit specific PCB layouts or assembly processes.

Product Applications

Drawing and dimensions

Package and shipment

RST Electric ensures safe delivery of every Non-inductive Metal Plate Resistor:

● Bulk Packaging: Resistors are packed in blister box, then placed in corrugated cartons to prevent lead bending and ceramic damage.

● Lead Protection: Leads are kept straight with foam end caps or tape.

● Matched Pair Packaging: Combined packages are individually wrapped to prevent mixing of unmatched pairs.

● Documentation: Packing lists and inspection certificates included with each shipment.

● Freight Options: Express courier (DHL/FedEx/UPS) for small quantities, air freight for medium volumes, sea freight for bulk orders.

All units undergo 100% electrical testing and visual inspection before packaging to ensure they meet specified resistance values and cosmetic standards.

Why choose RST Electric？

When low inductance and high frequency performance matter, RST Electric delivers.

Direct Factory, Metal Plate Specialists

● We are a certified Manufacturer based in China, specializing in Non-inductive Metal Plate Resistor production for over 10 years.

● Complete in-house control over element stamping/etching, encapsulation, and testing – ensuring consistent quality.

● Factory-direct pricing on every MPR Resistor, with transparent cost structure and no middlemen.

Professional Manufacturing & Quality Assurance

● ISO 9001 certified facilities with dedicated production lines for low-inductance power resistors.

● 100% electrical testing (resistance, dielectric, insulation) performed on every unit.

● Sample testing per IEC 60115 including temperature cycling, endurance, and damp heat.

● Experienced engineering team specializing in current sensing and high-frequency applications.

Global Experience, Trusted Supplier

● Proven Supplier to power supply manufacturers, motor drive companies, and automotive electronics producers worldwide.

● Export track record to over 40 countries, including Germany, USA, Japan, South Korea, Brazil, and India.

● Deep domain expertise in applications requiring ultra-low inductance and precision current sensing.

Endless Customization

● Power ratings: 2W to 10W single; combined configurations up to 7W+7W.

● Resistance values: 0.01Ω to 1kΩ (special values available).

● Tolerances: ±1%, ±2%, ±5%, ±10% (custom tolerances down to ±0.5% available).

● TCR: ≤ ±250 ppm/°C (lower TCR available for precision requirements).

● Lead forming: Straight / Cut and formed / Stand-off / Custom.

● Combined packages: Matched pairs for differential sensing.

● Custom dimensions: Available for special PCB layouts.

Reliable Delivery & Lifetime Support

● Standard lead time: 7-10 days for standard ratings; 10-15 days for customization product.

● Comprehensive documentation: Test reports, material certifications, RoHS/CE declarations.

● 12-month warranty with remote troubleshooting and spare parts dispatch.

● Technical support available for integration into power supplies, drives, and high-frequency circuits.