Round heating element INC series

ceramicautomotivewaterproof

Product overview
Thimble-type ceramic heaters are designed for automotive oxygen sensors used in electronic fuel injection engine control systems. The heater component enables faster warm-up of the sensor element to reduce cold-start emissions and ensure accurate air–fuel ratio monitoring.

Additional information
Thimble-type oxygen sensor heaters are manufactured with 1, 2, 3 or 4 wire configurations depending on design requirements. Due to emissions regulations, modern vehicles typically use sensors with an internal heater (commonly 4-wire). The thimble heater reaches operating condition approximately 40 seconds after ignition under typical conditions.

Thimble Oxygen Sensor Cutaway

• Ceramic inductor (zirconia tube)
• Heater rod (ceramic)
• Protective tube / outer sleeve

Features

• Fast warm-up: short ignition time to reach operating temperature after cold start
• Electrical insulation: ceramic materials ensure stable signal transmission
• High temperature and anti-poisoning resistance: reduced degradation from exhaust contaminants
• High compatibility: suitable for Bosch, Denso, Delphi, NTK & NGK and other mainstream sensor designs
• Durable design: produced by HTCC process for consistent performance
• Resistance to water and thermal shock: protective layer reduces cracking risk from condensate

Regular Product Model
Model | Size | Voltage | Resistance
INC-X5725TA | D2.5*57mm | 13V | 9±1% Ω
INC-X5729TDC | D2.9*57mm | 12V | 3.4±0.34 Ω
INC-X37255TA | D2.55*37mm | 13V | 5±0.5 Ω
INC-X50295TB | D2.95*50mm | 13V | 4.5±0.5 Ω
INC-X53430TE | D3*53.4mm | 13V | 13±1 Ω
INC-X56295TA | D2.95*56mm | 13V | 4.5±0.5 Ω
INC-X5736TFB | D3.6*57mm | 12V | 2.7~3.3 Ω
INC-X5736TG | D3.6*57.5mm | 12V | 2.3±0.3 Ω
INC-X5729TF | D2.9*57mm | 13V | 13±1.3 Ω

Product assembled and package photos
Assembled unit and packaging images are provided for inspection of final assembly, heater placement and packaging condition.

Technical specifications

• Product type: Thimble ceramic heater for automotive oxygen sensor
• Manufacturing process: HTCC (High-Temperature Co-fired Ceramic)
• Wire options: 1, 2, 3 or 4 wires (4-wire common in newer vehicles)
• Warm-up time: approx. 40 seconds after ignition
• Operating voltage: 12 V or 13 V depending on model
• Resistance range: approx. 2.3 Ω to 13 Ω (model dependent; see model table for specifics)
• Physical dimensions: diameters approx. 2.5–3.6 mm; lengths approx. 37–57.5 mm
• Compatibility: fits major oxygen sensor designs including Bosch, Denso, Delphi, NTK & NGK
• Materials and performance: ceramic heater rod with zirconia tube, providing electrical insulation and high-temperature resistance
• Durability: protective coating for increased resistance to water and thermal shock