Horizontal Ceramic Resistor

Basic Design

The Horizontal Ceramic Resistor from RST Electric represents a classic, highly versatile component family that balances power handling, reliability, and cost-effectiveness. Encased in a rectangular ceramic housing with axial leads, this Ceramic Power Resistor is designed for through-hole mounting on printed circuit boards or chassis mounting using brackets. The housing material – a high-temperature, flame-retardant ceramic – provides excellent thermal conductivity, electrical insulation, and mechanical protection, allowing the resistor to operate continuously at surface temperatures up to +200°C without degradation.

Internal Element Technologies & Structural Features

Internally, the SQP series offers two distinct element technologies: wirewound construction for applications requiring high pulse capability and low resistance values (down to 0.1Ω), and metal film construction for applications demanding lower noise and higher resistance values (up to 100kΩ). Both versions are encapsulated with inorganic silica filler, ensuring heat transfer efficiency and resistance to moisture and vibration. The horizontal (axial) lead configuration simplifies PCB layout and automatic insertion, while the flat rectangular shape provides stable mounting and clear marking for easy identification.

Quality Validation and Manufacturing Expertise

Each unit undergoes rigorous quality validation. Solderability testing ensures >90% coverage under 260±5°C for 2 seconds. Dielectric withstand is verified at 500VAC for 5 seconds with no breakdown. Temperature coefficient is maintained within ≤ ±300 ppm/°C. Temperature cycling from -55°C to +200°C (3 cycles) confirms mechanical integrity, while endurance testing at rated voltage for 1000 hours ensures long-term stability. Overload testing at 5× or 10× rated power (depending on element type) verifies pulse capability. As a trusted Horizontal Ceramic Resistor manufacturer in China, RST Electric combines over 10 years of resistor engineering expertise with precision manufacturing to deliver components that meet the demanding requirements of modern electronics.

Technical Specification

Product Features

1.Wide Power Range – From 1W to 100W in a single series, covering diverse applications from small signal circuits to high-power loads .

2.Dual Element Technology – Wirewound option for low resistance and high pulse capability; metal film option for low noise and high resistance .

3.Flame-Retardant Ceramic Housing – Encapsulated in inorganic silica filler within a ceramic case, providing excellent heat dissipation, electrical insulation, and mechanical protection .

4.High Temperature Operation – Continuous operation up to +200°C surface temperature with linear derating for safe use .

5.Precision Tolerances – Available from ±1% to ±10% to meet tight circuit requirements or cost-sensitive designs .

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

7.Rigorous Quality Validation – 100% testing of solderability, dielectric strength, and endurance ensures field reliability .

8.Low TCR – ≤ ±300 ppm/°C guarantees stable resistance values across operating temperature range .

9.Excellent Moisture Resistance – Damp heat testing at 40°C / 95% RH for 96 hours confirms performance in humid environments .

10.Standardized Form Factor – Consistent dimensions across power ratings simplify PCB layout and automatic insertion equipment setup .

Product Applications

Drawing and dimensions

Package and shipment

RST Electric ensures safe delivery of every Horizontal Ceramic Resistor:

● Bulk Packaging: Resistors are packed in anti-static plastic bags, then placed in corrugated cartons with foam cushioning to prevent lead bending and ceramic damage.

● Lead Protection: Leads are kept straight and protected with end caps or foam strips.

● 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.