Surge Arrester Resistor Disc (ZnO Varistor Blocks) | ASIAPOWER
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⚡ IEC 60099-4 · IEEE C62.11

Surge Arrester Resistor Disc (ZnO Varistor Blocks)

High energy absorption · Low leakage current · Excellent thermal stability · IEC compliant

ZnO Varistor Blocks - Surge Arrester Resistor Disc
Ø32mm – Ø128mm | 0.28kV – 1000kV

Key Features of ASIAPOWER Resistor Discs

Engineered for superior overvoltage protection and long-term reliability

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High Energy Absorption Capability

Up to 300 J/cm³ energy handling. Suitable for severe lightning and switching surge environments.

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Low Leakage Current

≤5µA at 0.75 V₁ₘₐ, typical ≤2µA. Minimises thermal runaway risk and extends arrester life.

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Stable Nonlinear Coefficient (α)

α value > 40 ensures excellent clamping performance and consistent protection level.

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Excellent Thermal Stability

Wide operating temperature -40°C to +85°C, with low degradation under repeated surges.

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IEC Standard Compliant Manufacturing

Full compliance with IEC 60099-4, IEEE C62.11. Third-party test reports available.

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OEM / ODM Customization

Custom voltage gradient, diameter, and energy rating to meet your specific arrester design.

Available Diameters & Voltage Range

📐 0.28 kV · 3 kV · 6 kV · 10 kV · 20 kV · 35 kV · 66 kV · 110 kV · 220 kV · 330 kV · 500 kV · 750 kV · 1000 kV
Ø32mm Ø38mm Ø42mm Ø48mm Ø56mm Ø62mm Ø75mm Ø84mm Ø100mm Ø110mm Ø128mm

Applications

ASIAPOWER resistor discs are widely used in the following surge arrester types

⚡ Distribution Surge Arresters
🏭 Transmission Line Arresters
🔌 Substation Arresters
🛡️ Polymer & Porcelain Arresters
🌬️ Wind & Solar Farm Protection
🚄 Railway Traction Systems

Arrester Accessories: Disconnector & Mounting Bracket

Reliable components for complete surge arrester / lightning arrester assembly

Disconnector

Designed for surge arrester and lightning arrester applications. Provides clear fault indication and isolates a failed arrester from the system, preventing prolonged short-circuit faults.

  • ✓ Low transient overvoltage
  • ✓ Hermetically sealed, IP67 option
  • ✓ Compatible with ASIAPOWER resistor discs
  • ✓ IEC 60099-4 compliant

Mounting Bracket

Heavy-duty galvanized bracket for secure installation of surge arresters on poles, walls, or substation structures. Minimises mechanical stress and ensures stable alignment.

Surge Arrester Mounting Bracket
  • ✓ Hot-dip galvanized / stainless steel optional
  • ✓ Custom hole patterns available
  • ✓ Withstands high mechanical loads

✅ Ask about our complete package — resistor discs + disconnector + bracket, ready for OEM assembly.

🔧 OEM / ODM Manufacturing Tailored to Your Arresters

Custom voltage gradient (V/mm), precise leakage current screening, special coating, and polarity marking. We co-develop varistor blocks that match your exact protection curve. From small batch prototypes to mass production — ASIAPOWER is your reliable partner.

ASIAPOWER resistor disc manufacturing workshop - ZnO varistor block production lineAdvanced manufacturing facility — precision pressing, high-temperature sintering, and 100% electrical testing.

Need Surge Arrester Resistor Discs?

Send us your requirement — we’ll reply within 24 hours

⚡ Voltage level 📏 Diameter (Ø32–128mm) 🔋 Energy class / J/cm³ 📦 Quantity (pcs/month)

Frequently Asked Questions

❓ What is ZnO varistor block used for?
ZnO varistor blocks are the core components inside metal-oxide surge arresters (also known as lightning arresters). They clamp overvoltages by changing from high resistance to low resistance during lightning or switching surges, protecting transformers, lines, and substations.
❓ What is the lifespan of resistor discs?
Under normal operating conditions (within rated voltage and surge duty), ASIAPOWER resistor discs have an expected life of over 30 years, with low degradation and stable leakage current throughout service life.
❓ Can you customize energy rating?
Yes. We offer OEM/ODM customization of energy absorption capability (up to 300 J/cm³), voltage gradient, diameter, and even special coating requirements. Just provide your technical specification.
❓ Do you provide samples for testing?
Yes, free samples are available for qualified projects. Please contact us with your application details and expected annual volume.

Contact ASIAPOWER

📧 [email protected]
🌐 www.asiapower.net
📞 WhatsApp: +86 13786188769

✅ OEM/ODM | Fast lead time | Full IEC compliance

👉 Learn more about Surge Arrester Resistor Discs
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