KT-AC-SPD/A1 Series

Product Description
KT Surge Protection Devices - Product Specification

KT Surge Protective Devices

China's Premier SPD Manufacturer

As a leading manufacturer of high-quality surge protective devices (SPDs) in China, KT leverages its deep understanding of industry standards and   regulations.

We produce millions of SPDs annually. Our dedicated teams deliver these surge protective devices, combining market-focused solutions with our commitment to exceptional client service and quality.

SPD Product

Product Parameter Table

ParameterSymbol275V320V385V440V
Nominal AC Voltage (50/60Hz)Un230V230V230V400V
Maximum Continuous Operating Voltage (AC)Uc275V320V385V440V
Nominal Discharge Current (8/20 μs)In20kA - 60kA
Maximum Discharge Current (8/20 μs)Imax60kA- 120kA
Impulse Discharge Current (10/350 μs)Iimp12.5kA - 25kA
Voltage Protection LevelUp≤1.8-2.0kV≤2.0-2.5kV≤2.0-2.8kV≤2.0-3.0kV
Response TimetA< 25 ns
Back-Up Fuse (max)-125 - 315 A gL / gG
Short-Circuit Current Rating (AC)Isccr25 kA
Operating Temperature RangeTa-40 °F to + 158 °F [-40 °C to + 70 °C]
Conductor Cross Section (max)-2 AWG (Solid, Stranded) / 4 AWG (Flexible)
Conductor Cross Section (max)-35 mm² (Solid, Stranded) / 25 mm² (Flexible)
Mounting-35 mm DIN Rail, EN 60715
Degree of Protection-IP 20 (built - in)
Operating State / Fault Indication-White ok / Red defect
Remote Contacts (RC)-Optional
RC Switching Capacity-AC: 250 V / 0.5 A; DC: 250 V / 0.1 A; 125 V / 0.2 A; 75 V / 0.5 A
RC Conductor Cross Section (max)-16 AWG (Solid) / 1.5 mm² (Solid)

Why Choose KaiTai? Your Agile Partner for SPD Electrical Solutions

We specialize in customized OEM/ODM manufacturing of AC/DC SPDs and empower partners with robust distribution support.

Customization

Flex-Focused Customization

(OEM/ODM Edge)

  • Zero-MOQ Production: Expert in small-batch development (no minimum order). Submit samples → receive initial design proposals in 3-5 workdays.
  • Precision Engineering: Portable 3D scanning + CAD   modeling with cost-optimized material recommendations. 50+ successful SME collaborations.
  • Brand Integration: Customize products   (LOGO/model/parameters), stickers (QR codes/IDs), and   packaging – all complimentary.

Cost-Smart Engineering

(Boost Your Margins)

  • Reduce Expenses: 8+ year engineers optimize structures   via SolidWorks, cutting production costs by 10-15%.
  • Modular Efficiency: Patented modular designs accelerate   assembly by 20% – ideal for 50-1,000 unit runs.
Value Engineering
Production Systems

Responsive Manufacturing

(Order Flexibility)

  • Agile Production: Compact CNC + industrial 3D printers   handle 50-1,000pcs orders.
  • Risk-Free Prototyping: 15-member team manages design-to-prototype validation, ensuring manufacturability before   scale-up.

Transparent Quality

(Trusted Supply Chain)

  • Triple Inspection: Raw material check → in-process sampling → 100% final testing.
  • 0.5% Defect Rate: 12-month core component warranty + real-time quality docs.
  • Open Factory Access: On-site audits welcome.
Quality Assurance
Customer Support

Partner-Centric Service

(OEM/ODM Priority)

  • 4-Hour Response: Founder-led project management.
  • "Design-Trial-Production" Service: End-to-end support + 3 free design modifications for first orders.
  • Dedicated Account Portfolios: Proactive improvement   tracking.

Elevate Your Electrical Solutions

Custom & Standard AC/DC Surge Protective Device

We Empower Distributors, Brands, Engineers, and E-commerce Platforms

Distributors & Wholesalers

Expand portfolios with certified   SPDs. Maximize margins with   competitive OEM pricing +technical backup.

Brands & OEM Partners

Launch white-label SPDs using our IEC/EN 61643-compliant engineering. Full   branding integration.

Engineers & Specifiers

Access project-ready technical documentation,   compliance support, and custom   design services.

E-Commerce Platforms

Leverage ready-to-ship SPDs + dropshipping.Includes digital marketing assets.

Strategic Partnership Program

For connectors in construction/energy sectors:

  • Earn commissions via referral incentives
  • Unlock exclusive distributor terms
  • Pursue project-based co-development

Power Progress Together – Let KaiTai be your surge protection solutions engine.

READY TO COLLABORATE?

Your next-generation SPD partnership starts here

① OEM/ODM

Send product specs for instant DFM analysis

② Distribution

Request territory-specific pricing & support

③ Project Broker

Explore commission structures

CONTACT US

Subject Line: "OEM Quote" / "Distribution Inquiry" / "Broker Program"

Your next-generation SPD partnership starts here.