PTC heater STW Series

ceramicindustrialfor electric vehicles

Overview
KLC high-voltage PTC heaters provide self-regulating, rapid and energy-efficient heating across a broad voltage range (12 V–999 V), with UL/CSA approvals for 12 V–600 V. Engineered for electric vehicles, battery systems, charging infrastructure and industrial equipment, these heaters deliver consistent thermal output, simplified thermal management and options for OEM customization under IATF 16949 manufacturing processes.

Key Features

• Self-regulating PTC ceramic: Limits current as temperature rises to prevent overheating and simplify control.
• Wide voltage compatibility: 12 V–999 V (UL/CSA certified for 12 V–600 V) for EV platforms, chargers and industrial supplies.
• High power density: Up to 30,000 W depending on size and configuration for fast warm-up.
• Multi-stage output: Configurable power stages for application-specific energy optimization.
• Automotive/industrial quality: Manufactured to IATF 16949 / ISO 9001 standards with global certification pathways.
• Customizable form factors: Flexible dimensions, tube count, fin options and wiring/connectors to meet OEM requirements.

Models (selected)
Voltage Range | Model | Dimensions (mm) | Tube No. | Fin Width (mm) | Fin Pitch (mm) | Standard | Wired
12~500V | MH(W) | 26 x 90 x L (70~492) | 2 or 3 | 90 | 1.2 / 2.0 / 2.6 | Terminal type | Available
12~500V | MSH(W) | 26 x 65 x L (70~492) | 3 | 65 | 1.68 / 2.6 | Terminal type | Available
12~500V | SH(W) | 26 x 65 x L (70~492) | 2 | 65 | 1.68 | Terminal type | Available
12~500V | TH(W) | 26 x 45 x L (70~492) | 2 | 45 | 2.0 | Terminal type | Available
12~500V | OH(W) | 26 x 30 x L (30~492) | 1 | 30 | 1.68 | Terminal type | Available
12~999V | STW Series | 10 x 10 x 10 ~ 999 × 337.5 × 25 | – | – | – | Custom | Customizable

Applications

• Charging stations: maintain optimal temperatures during battery charging in cold climates.
• Electric trucks, buses and cars: cabin heating, component protection and cold-start assistance.
• Battery systems: cell and pack temperature maintenance for performance and longevity.
• Construction, agricultural and industrial electric machinery: ensure operational readiness and reduce downtime.
• Rail and special-purpose vehicles operating in harsh environments.
• HVAC and air-handling units requiring compact, efficient electric heating.

Why Choose KLC High Voltage PTC Heaters?

• Fast warm-up effective down to -20°C for cold-start scenarios.
• Improved energy efficiency compared with conventional resistive heaters in many use cases.
• Industrial and automotive-grade production (IATF 16949, ISO 9001) with UL/CSA certification options.
• Engineering support: 3D simulation, lab testing, life-cycle validation and integration assistance.
• Design flexibility for non-standard housings, connectors and high-voltage platforms (including 800 V+).

Technical Specifications

• Voltage: 12 V ~ 999 V (UL & CSA approved: 12 V ~ 600 V)
• Power output: Up to 30,000 W (dependent on size & design)
• Heating element: PTC ceramic (self-regulating)
• Form factors: Standard MH / MSH / SH / TH / OH families and custom STW series (10×10×10 mm to 999×337.5×25 mm)
• Fin widths: 30, 45, 65, 90 mm (model dependent)
• Tube configurations: 1 to 3 tubes (model dependent)
• Fin pitch examples: 1.2 mm / 1.68 mm / 2.0 mm / 2.6 mm
• Certifications: IATF 16949, ISO 9001:2015; UL/CSA up to 600 V; VDE optional; certification pathways available for >600 V
• Typical applications: EV cabin heating, battery heating, charging stations, industrial heating, HVAC, cold-start assistance