Radial Cement Resistor

What Makes the Radial Cement Resistor Stand Out in Compact High-Power Applications?

The Radial Cement Resistor from RST Electric bridges the gap between PCB-mounted power resistors and larger chassis-mount units, offering a compact yet thermally efficient solution for applications requiring high power dissipation in constrained spaces. Unlike standard axial or radial resistors that rely solely on PCB traces and ambient air for cooling, this Chassis Mount Resistor incorporates robust metal brackets that allow direct attachment to a heat sink or metal equipment chassis, dramatically improving heat transfer and enabling sustained high-power operation.

How Is the High Power Cement Resistor Built for Thermal & Mechanical Reliability?

The construction of this High Power Cement Resistor prioritizes thermal conductivity and mechanical stability. The resistive element—available in wirewound configuration for low-resistance, high-pulse applications (down to 0.1Ω) or metal film for low-noise, high-resistance requirements (up to 100kΩ)—is encapsulated in an inorganic silica filler and housed in a flame-retardant ceramic case. The unique SQHG design features both radial leads for electrical connection and integrated mounting brackets with pre-drilled holes (typically 4.0mm diameter) for screw or bolt fixation. This dual connection method ensures both electrical integrity and mechanical security, even in high-vibration environments. The package orientation is horizontal, with the long axis of the resistor parallel to the mounting surface, minimizing height profile while maximizing contact area for heat transfer.

What Rigorous Tests Confirm the Resistor’s Durability in Industrial Environments?

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 at ≤ ±250 ppm/°C. 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 Radial Cement Resistor manufacturer in China, RST Electric combines over 10 years of power resistor expertise with precision manufacturing to deliver components that provide robust thermal management in industrial and commercial equipment.

Technical Specification

What are the advantages of this product?

1.Integrated Mounting Brackets – Built-in metal brackets with pre-drilled holes (4.0–4.2mm) enable secure attachment to chassis or heatsinks, maximizing thermal transfer.

2.High Power Density – Up to 50W in a compact rectangular package, ideal for applications where board space is limited but power dissipation requirements are high.

3.Dual Electrical & Mechanical Termination – Radial leads provide solder connections while brackets provide mechanical support, reducing stress on PCB solder joints.

4.Improved Temperature Coefficient – ≤ ±250 ppm/°C ensures stable resistance values across the full operating temperature range.

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

6.Wide Resistance Range – Wirewound version down to 0.1Ω for high-current sensing; metal film version up to 100kΩ for voltage division.

7.High Temperature Operation – Continuous operation up to +200°C case temperature with linear derating.

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

9.Robust Construction – Withstands vibration (50m/s²) and temperature cycling (-55°C to +200°C) without performance degradation.

10.Comprehensive Quality Validation – 100% testing of solderability, dielectric strength, and endurance per IEC 60115 standards.

Product Applications

Drawing and dimensions

Package and shipment

RST Electric ensures safe delivery of every Radial Cement Resistor:

We attach great importance to the transportation safety of each Ceramic Resistor. Before delivery, we will provide customized packaging solutions based on the order size to ensure the integrity of the products throughout the process.

For regular orders, an independent packaging process is adopted: each resistor is first fully covered with static electrical insulation film, and then placed in an independent box to provide adequate protection for the ceramic body and the support structure. For large-scale purchases, corrugated cardboard is used for whole-box packaging, with foam partitions inside to effectively prevent pin bending and support deformation, ensuring installation accuracy.

For key parts such as pins and supports, we will additionally fill foam pads for reinforcement to ensure they remain straight during transportation and do not affect subsequent installation. Each shipment of goods is accompanied by a packing list and inspection certificate, facilitating quick acceptance and archiving by customers.

The delivery method is flexible and can be adapted to the purchase scale: small batches can choose international express delivery services such as DHL/FedEx/UPS; medium-sized batches are suitable for air transportation; large-scale orders are transported by sea, balancing cost and timeliness.

Before packaging all Ceramic Resistors, 100% electrical testing and appearance inspection are conducted to ensure that the core indicators such as resistance values are accurately met, and the product appearance is strictly controlled to comply with the custom standards, ensuring that the delivered products fully meet the usage and compliance requirements.