1. Silicone Foil Heating Element L 400mm W 290mm 1000W (with 140°C Limiter)
Hongtai manufactures high-precision silicone foil heating elements designed for applications requiring rapid thermal transfer with guaranteed overheat protection. This specific model features a large L 400mm W 290mm surface area, delivering 1000W of power at 230V via advanced etched foil circuits.
Unlike standard heaters, this unit is equipped with a built-in temperature limiter silicone encapsulated switch. This safety device automatically cuts power if the surface temperature exceeds T.max 140°C, preventing damage to the heater or the substrate (e.g., a dry water tank or plastic enclosure). This makes it the safest choice for unattended heating applications.
2. Key Technical Features
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Etched Foil Technology: The internal circuit uses chemically etched metal foil rather than wire. This covers 90% of the surface area, ensuring exceptionally uniform heat distribution without “hot spots.”
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Integrated Safety: A bi-metal thermal protector is vulcanized directly into the pad, providing a hard cutoff at 140°C. This is critical for fire safety and equipment protection.
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Thermal Efficiency: The thin profile (1.5mm) and aluminum-compatible adhesive (3M 468MP) ensure heat transfers instantly to the heat sink or tank wall.
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Durability: Fiberglass-reinforced silicone rubber provides insulation resistance >500 MΩ and dielectric strength >1500V.
3. Technical Specifications
| Parameter | Specification |
| Heater Type | Silicone foil heating element |
| Dimensions | L 400mm x W 290mm |
| Power Output | 1000W (+5% / -10%) |
| Input Voltage | 230V AC (50/60Hz) |
| Max Temperature (T.max) | 140°C (Limiter Cut-off) |
| Heating Element | Etched Nickel Alloy Foil |
| Mounting | Self-Adhesive Backing (PSA) |
| Lead Wire | 500mm Silicone Insulated Leads |
| IP Rating | IP64 (Moisture Resistant) |
4. Industrial Applications
This silicone foil heating element L 400mm W 290mm 1000W 230V t.max. 140°C with temperature limiter silicone is engineered for:
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Commercial Food Warmers: Preventing element burnout if the Bain Marie runs dry.
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Medical Sterilizers: Heating stainless steel autoclaves with precise safety limits.
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Battery Warming: Large format battery enclosures where exceeding 140°C would be catastrophic.
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Ultrasonic Cleaners: Heating the cleaning solvent tank externally.
5. Why the 140°C Limiter Matters?
In many heating applications, control failure is a risk. If your primary thermostat fails in the “ON” position, a standard 1000W heater will continue to rise in temperature until it melts or causes a fire.
The Hongtai T.max 140°C limiter acts as a fail-safe. It is completely independent of your main controller. If the surface hits 140°C, it mechanically opens the circuit, stopping the runaway heating event immediately.
6. FAQ
Q: Is the limiter auto-reset?
A: Yes. Once the temperature drops below the safe threshold (typically around 110°C-120°C), the limiter will close the circuit and heating will resume.
Q: Can I use this for 110V?
A: This specific SKU is designed for 230V. Running it at 110V would result in only 250W of power (1/4 of rated power), which is likely insufficient for a heater of this physical size. Please order our 110V version for US/Japan markets.
