Vertical Ceramic Wirewound Resistor

Design Advantage

The Vertical Ceramic Wirewound Resistor from RST Electric addresses a common challenge in modern electronics design: delivering high power dissipation within constrained board space. Unlike horizontal axial-lead resistors that consume significant linear board area, this Radial Resistor mounts vertically, with leads exiting from one end of the rectangular ceramic body, allowing it to stand upright. This orientation reduces the PCB footprint by 50-70% compared to equivalent axial-lead components, making it ideal for densely packed power supplies, motor drives, and consumer electronics.

Construction, Thermal Management & Configurations

The construction of this Ceramic Encased Resistor prioritizes thermal management and mechanical robustness. The resistive element—available in wirewound construction for high pulse capability (down to 0.1Ω) or metal film for low noise and high resistance (up to 100kΩ)—is encapsulated in an inorganic silica filler and housed in a flame-retardant ceramic case. The vertical orientation naturally promotes convective cooling, while the radial leads provide secure through-hole mounting with excellent solder joint strength. The SQM series includes standard vertical packages as well as two special configurations: WS (wide-body slim) and WB (wide-body extended lead spacing), offering design flexibility for different mounting hole patterns and voltage clearance requirements.

Quality Validation & Manufacturing Expertise

Each unit undergoes comprehensive validation. Solderability testing ensures >90% coverage at 260±5°C for 2 seconds. Dielectric withstand is verified at 500VAC for 5 seconds with no breakdown. Temperature coefficient is maintained at ≤ ±250 ppm/°C (better than standard horizontal equivalents). Temperature cycling from -55°C to +200°C confirms structural integrity, while endurance testing at rated voltage for 1000 hours validates long-term reliability. Overload testing at 10× rated power (wirewound) or 5× rated power (metal film) confirms pulse capability. As a trusted Vertical Ceramic Resistor manufacturer in China, RST Electric combines over 10 years of power resistor expertise with precision manufacturing to deliver components that optimize board space without compromising performance.

Technical Specification

Product Features of Vertical Ceramic Wirewound Resistor

1.Space-Saving Vertical Orientation – Radial lead design allows upright mounting, reducing PCB footprint by 50-70% compared to axial-lead alternatives .

2.Dual Element Technology – Wirewound option for low resistance (0.1Ω) and high pulse capability; metal film option for low noise and high resistance (100kΩ) .

3.Improved Temperature Coefficient – ≤ ±250 ppm/°C provides better stability across operating temperature range compared to standard ceramic resistors .

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

5.Multiple Body Styles – Standard vertical (SQM), wide-body slim (WS), and wide-body extended lead spacing (WB) configurations for design flexibility .

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

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

8.Robust Lead Strength – 10N pull test ensures reliable through-hole mounting and resistance to vibration.

9.Standardized Lead Spacing – Consistent pitch (5mm, 7.5mm, 8mm, 10mm, 12.5mm) accommodates common PCB layouts and automatic insertion equipment.

Product Applications

Drawing and dimensions

Package and shipment

RST Electric ensures safe delivery of every Vertical Ceramic Wirewound Resistor:

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

● Lead Protection: Radial leads are kept straight and protected with foam end caps.

● 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.

Regarding us

RST Electric is a legally certified manufacturer in China, specializing in the production of Vertical Ceramic Wirewound Resistors. We focus on addressing the core pain point of limited PCB space in modern electronic design, and are committed to providing global customers with high-performance and space-saving resistance solutions. We are a professional vertical resistor manufacturer in the industry.

Throughout the entire production process, we achieve full-process self-control. From the winding of wire-wound components, metal film deposition, to packaging and final inspection, all are completed by our internal team. This full-process self-management model ensures the stability of product quality and eliminates the uneven quality caused by outsourcing of individual stages. We adhere to the factory direct supply model, with transparent cost structure and no intermediate links, enabling customers to purchase high-quality resistors at more favorable prices while enjoying reliable quality assurance.

Our production base has obtained ISO 9001 certification and is equipped with an exclusive production line for radial lead ceramic resistors. The production process is standardized and strictly controlled. Each vertical ceramic wire-wound resistor undergoes 100% electrical testing, covering core indicators such as resistance value, dielectric strength, and insulation performance. We also conduct sample tests in accordance with the IEC 60115 standard, including temperature cycling, durability, and humidity testing, to ensure stable product operation. Our engineering team is highly experienced and focuses on power resistor applications in space-constrained scenarios, providing professional technical support to our customers.

With stable product quality and professional services, we have become a trusted supplier for global power equipment manufacturers, home appliance OEMs, and industrial control enterprises. Our products are exported to 40+ countries including Germany, the United States, Japan, South Korea, Brazil, and India. In the application field of "large power capacity in small PCB space", we have rich industry experience and can provide comprehensive customization services and reliable delivery support. We offer 12-month warranty and professional after-sales service, and are committed to creating long-term value for global customers.