Wirewound resistor is constructed by winding alloy resistance wire on a high-temperature ceramic core. It is the preferred power resistor for DC and low-frequency industrial circuits, featuring high power rating and strong short-time surge withstand. Standard single-winding designs carry inherent parasitic inductance, which is the key design trade-off.Guangdong Qingda supplies both conventional inductive wirewound resistors and Ayrton‑Perry non-inductive wirewound resistors, in vitreous enamel, cement and aluminum housed packages. Global and Hong Kong orders are handled by Qingda Industrial Co., Limited with compliance documents and cross-border delivery.
High-purity alumina ceramic core as insulation skeleton. Resistance wire (Nichrome, Constantan or Manganin) is wound with controlled turns, then terminated and protected by enamel coating, cement or thermally conductive aluminum housing.
Nichrome wire: high temperature resistance for power braking and discharge
Manganin / Constantan wire: ultra-low TCR for precision high-current sensing
Single winding: low cost, obvious parasitic inductance
Ayrton‑Perry non-inductive winding: counter-wound layers cancel magnetic flux and minimize inductance
Comparison:
Wirewound: high power & surge capacity; inductive by default, not for RF
RI80 glass glaze: high voltage, high resistance bleed
MF metal film: low noise precision small signal, low power
MELF wafer: SMT surge resistor for PCB
High continuous power rating up to several kilowatts
Excellent short-time overload and pulse energy withstand
Low TCR; Manganin versions down to ±5ppm/℃ for precision sensing
Accurate resistance, easy for low mΩ values
Multiple packages: vitreous enamel, cement, aluminum housed with screw mounting
Wide operating temperature, vibration resistant for industrial chassis
Important note: Standard wirewound resistors have significant self-inductance, which causes oscillation in high-speed pulse circuits. Choose non-inductive wirewound or RF thin-film resistors for high-frequency paths. Wirewound resistors are not suitable for GΩ-level high resistance; use RI80 glass glaze instead.
Vitreous enamel tubular wirewound: axial lead, 1W~30W, for PCB assembly
Cement encapsulated wirewound: flame retardant, 5W~100W, cost-effective for power boards
Aluminum housed wirewound: potting with thermal compound, mountable on heat sink, 20W~3000W, widely used for braking, pre-charge and electronic load, 4-terminal sensing type available.
Resistance: 0.005Ω ~ 22kΩTolerance: ±0.05%, ±0.1%, ±0.25%, ±0.5%, ±1%, ±5%Custom winding, 4-terminal layout, mounting holes and power rating supported, samples within 7 days.
VFD braking resistors, servo dynamic braking, BMS pre-charge, battery discharge load, electronic aging load, high-current precision sensing, UPS, welding machine, charging piles and industrial test equipment.
In-house power cycling, overload and temperature rise test, test reports available.
One-stop BOM supply, bundled with glass glaze, MELF, metal film, RF microwave and shunt resistors.
Dual-entity cross-border service: manufacturing in Zhuhai factory; Hong Kong delivery and global trade via Qingda Industrial Co., Limited with FOB/CIF terms, RoHS & MSDS documents.
Power thermal design support, help select inductive / non-inductive versions and avoid thermal runaway or oscillation.
Q: Inductive vs non-inductive wirewound?A: Inductive for DC / 50Hz steady brake load; Ayrton‑Perry non-inductive for switching pulse circuits requiring low inductance.Q: Can wirewound resistors be used for RF circuits?A: Not recommended. Special RF microwave thin-film resistors are required for GHz bands.Q: Must aluminum housed types use a heat sink?A: Derating is mandatory without heat sink under full power.Q: Hong Kong delivery available?A: Yes, arranged via Qingda Industrial Co., Limited.Q: Difference between wirewound manganin resistor and manganin shunt?A: Manganin shunt is dedicated 4-terminal low-ohm sensing part; manganin wirewound suits higher power sensing scenarios.
Contact Guangdong Qingda Electronic Technology Co., Ltd. for domestic inquiries. Overseas & Hong Kong orders please contact Qingda Industrial Co., Limited.