Energy-efficient Bathroom Instant Water Heater

SZH's smart toilet control board PCBA is designed for premium electronic bidets, integrating seat heating, energy-saving algorithms, and multi-layer safety protection for enhanced user experience. With over 10 years of expertise, we provide ODM/OEM solutions for global brands, leveraging advanced R&D in precision molds and vertically integrated supply chains for fast delivery and cost efficiency. Annual production capacity exceeds 2 million units, SZH provide flexible customization, empowering clients to lead the smart bathroom market.

  • SZH
  • China
  • Information

1. Product Overview

    This product is designed for smart toilet instant water heaters, featuring high-density PCB integration ,with millisecond-level heating response. The core board connects via CAB-2837 certified cables to ensure complete water-electricity isolation, making it ideal for premium smart bathroom systems.

1.1 Key Features

? Precision Ciruit Design

  • Multi-layer PCB with STM32F103 MCU

  • 110123-series SMD resistors/capacitors for signal stability

? Safety Protection

  • Dual DB-2214 protection modules (overcurrent/overvoltage)

  • Color-coded wiring (red/blue/black for power/signal/ground)

? Smart Control

  • Cloud communication via CAB-2837 shielded cable

  • Real-time heating tube impedance monitoring


2. Technical Specifications

2.1 PCB Assembly Parameters

ParameterSpecification
MCUSTM32F103C8T6
Operating VoltageDC 12V±5% / Isolated AC 220V
Signal Accuracy±0.5% (110123 SMD resistors)
CommunicationRS-485 (via CAB-2837 shielded cable)

2.2 System Performance

  • Heating Response: ≤2 sec (standby to 40°C)

  • Temp Control Error: ±1°C (NTC feedback)

  • Insulation Resistance: ≥100MΩ (500V DC test)


3. Structural Details

3.1 PCB Layout

  • Power Zone (Left):

    • Red cable: AC 220V input (with ferrite bead)

    • Black cable: Grounding

  • Control Zone (Center):

    • Dual DB-2214 modules (symmetrical design)

    • 110123-component group (signal conditioning)

  • Output Zone (Right):

    • Blue cable: DC 12V relay output

    • Clear tubing: NTC sensor wires

3.2 Safety Design

  • Transparent insulation sleeves: Double-layer HV protection

  • Metal mount: Aluminum heatsink (visible screw holes)



Custom Smart Toilet Mainboard PCBA

Instant water heater

Modular Function Design

Core Functions (Rapid Integration)

Heating

Cleaning

Control

 Hygiene  

Seat heat

Bidet wash

Power-off flush

Nozzle clean

Dry heat

Feminine wash

Foot-sense flush

Foam shield

Temp adjust

Massage spray

Auto flush  

 

Advanced Customization

- Electronic Extensions:  

  IoT Control: APP/Wireless remote  

  HMI: Smart display + Voice feedback  

  Health: urinalysis (interface reserved)  

- Mechanical Synergy:  

  Auto-lid motor drive optimization  

  Precision foam generator control  

 

End-to-End Development

 Vertical Manufacturing Advantage:  

  Mold R&D: fast structural development (solves deformation/leaks)  

  Electro-mechanical integration: Unified PCBA & heating module design  

  Pilot to mass production: in-house SMT+assembly to ensure fast production


Competitive Benchmarking

Traditional Development Pain Points

Our Solutions

Technical Support

slow development due to excessive feature integration

Modular design + pre-reserved interfaces

patent portfolio

Electro-mechanical design misalignment

Parallel electro-mechanical co-development

In-house mold center + SMT production lines

Lengthy certification cycles

Pre-validated architecture (50% test time reduction)

10-year ODM empirical database 


Transform your smart toilet concept into a market-ready product. Welcome to contact with us today for a personalized proposal with functional prototypes, BOM optimization analysis, and turnkey delivery schedule.


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