Product Overview: A High-Reliability Double-Sided PCB for Intelligent Security
China’s electric vehicle fleet has surpassed 380 million units, making anti-theft alarms a standard safety feature on nearly every e-bike and EV. The domestic EV alarm market has grown from RMB 1.86 billion in 2020 to RMB 4.32 billion, with a compound annual growth rate of 18.4% and market penetration rising from below 35% to over 78%【6†L21-L26】. Within this rapidly expanding sector, the printed circuit board (PCB) serves as the “neural center” of the alarm system—its quality directly determines alarm reliability and service life.
UGPCB’s Electric Vehicle Alarm PCB is a high-performance double-sided rigid printed circuit board engineered specifically for vehicle anti-theft alarm systems. Manufactured with Kingboard KB6165F high‑Tg lead‑free FR‑4 laminate at 1.6 mm thickness and sized at 67 × 41.37 mm, this PCB delivers exceptional heat resistance, stable electrical performance, and robust mechanical strength. It offers an ideal carrier for electric vehicle alarm PCBA solutions.
Product Classification
Per IPC‑6012 Qualification and Performance Specification for Rigid Printed Boards, this product falls into the following categories:
| Classification Dimension | Category |
|---|---|
| By Structure | Double‑sided rigid PCB |
| By Base Material | FR‑4 epoxy glass fabric laminate (KB6165F) |
| By Surface Finish | Lead‑free HASL (Hot Air Solder Leveling) |
| By Flammability Rating | UL 94 V‑0 |
| By Performance Class | IPC‑6012 Class 2 (dedicated‑service electronic products) |
| By Application | Automotive electronics – security and monitoring systems |
Core Specifications and Design Essentials
Key Parameters
| Parameter | Specification | Engineering Significance |
|---|---|---|
| Laminate | Kingboard KB6165F FR‑4 | High‑Tg lead‑free compatible; meets IPC‑4101E/99 and /126 |
| Board Thickness | 1.6 mm | AEC‑recommended thickness balancing strength and assembly ease |
| Layer Count | Double‑sided | Supports alarm circuit density while optimizing cost |
| Dimension | 67 × 41.37 mm | Fits mainstream EV alarm enclosures |
| Minimum Finished Hole | 0.33 mm | Supports precision component leads and via‑in‑pad designs |
| Line Width / Spacing | 0.36 mm / 0.44 mm | Balances signal integrity with manufacturability |
| Copper Foil Thickness | 35 μm (1 oz) | Meets current‑carrying capacity and thermal dissipation needs |
| Surface Finish | Lead‑free HASL | RoHS‑compliant with excellent solderability and cost efficiency |
| Solder Mask / Legend | Green / White | Industry‑standard configuration for clear identification and protection |
Design Essentials for Electric Vehicle Alarm PCBs
PCB design for EV alarm systems must follow IPC‑2221 Generic Standard on Printed Board Design, while addressing alarm‑specific requirements:
Power Management – EV alarms typically draw power directly from the vehicle battery at 36 V to 60 V, requiring a DC‑DC step‑down to 5 V or 3.3 V for the MCU and sensors. PCB layout must carefully position the power conversion stage for optimal thermal and electrical performance.
Signal Integrity – KB6165F exhibits a dielectric constant (Dk) of 4.8 and a dissipation factor (Df) of just 0.015 at 1 MHz, ensuring high‑quality signal transmission for wireless modules such as Bluetooth 5.3 and 433 MHz remote controls.
Vibration and Reliability – Alarms endure continuous vibration during vehicle operation. The 1.6 mm board thickness, paired with KB6165F’s high mechanical strength (copper peel strength typically 1.30 N/mm at 125°C), delivers long‑term field reliability.
Working Principle
The Electric Vehicle Alarm PCB serves as the central interconnection and support platform for the entire alarm system. Its operation can be understood at three levels:
Electrical Interconnection – The PCB’s precisely etched copper traces electrically connect all components—power management IC, vibration sensor, wireless communication module, microcontroller (MCU), buzzer driver circuit, and others—according to the schematic, forming a complete alarm function circuit.
Signal Processing – When the vibration sensor detects abnormal motion, the signal travels through PCB traces to the MCU. After evaluating trigger conditions, the MCU drives the buzzer via the PCB’s driver traces to emit a high‑decibel alarm, while simultaneously sending a wireless alert to the user’s remote control.
Power Management – The PCB’s power management section steps down the high battery voltage (36 V–60 V) to low voltage (5 V/3.3 V), providing stable power to the entire alarm system.
Material Selection: KB6165F High‑Tg Lead‑Free FR‑4
Material Overview
KB6165F is a dedicated lead‑free high‑Tg FR‑4 copper‑clad laminate from Kingboard Laminates, utilizing a non‑DICY, phenolic‑cured epoxy resin system with proprietary fillers. Engineered specifically to withstand the high temperatures of lead‑free soldering processes, it has rapidly become a benchmark material for high‑reliability electronic products.
Thermal Performance
| Property | Test Method | Typical Value | Specification Requirement | Data Source |
|---|---|---|---|---|
| Glass Transition Temperature (Tg) | DSC (E‑2/105) | 157°C | ≥150°C | KB6165F datasheet |
| Thermal Decomposition Temperature (Td) | TGA (5% weight loss) | 346–352°C | ≥325°C | KB6165F datasheet |
| Z‑axis CTE (below Tg) | Alpha 1 | 37–40 ppm/°C | ≤60 ppm/°C | KB6165F datasheet |
| T‑288 (288°C thermal stress) | — | >240 seconds | — | KB6165F datasheet |
A Tg of 157°C ensures the laminate maintains rigidity under lead‑free reflow peak temperatures (approximately 260°C), effectively preventing delamination, blistering, and plated through‑hole (PTH) cracking. The Z‑axis CTE of 37–40 ppm/°C—far superior to the ≤60 ppm/°C industry benchmark—significantly reduces stress‑related failures caused by temperature cycling.
Electrical Properties
| Property | Typical Value | Data Source |
|---|---|---|
| Surface Resistance | 2.6 × 10⁸ MΩ | KB6165F datasheet |
| Volume Resistance | 3.4 × 10⁹ MΩ·cm | KB6165F datasheet |
| Dielectric Constant (Dk) @ 1 MHz | 4.8 | KB6165F datasheet |
| Dissipation Factor (Df) @ 1 MHz | 0.015 | KB6165F datasheet |
| Dielectric Breakdown Voltage | ≥45 kV | KB6165F datasheet |
| Arc Resistance | 127 seconds | KB6165F datasheet |
Safety and Environmental Certifications
KB6165F carries UL94 V‑0 flame‑retardant certification—the highest classification in the vertical burn test, requiring self‑extinguishment within 10 seconds with no flaming drips that ignite cotton. The material also fully complies with RoHS lead‑free environmental directives.
Product Structure and Performance Characteristics
Structural Features
This double‑sided PCB utilizes both top and bottom layers within a compact 67 × 41.37 mm footprint. The 1.6 mm board thickness aligns with AEC‑recommended PCB thickness ranges, balancing mechanical strength with assembly convenience. 35 μm (1 oz) copper foil thickness delivers adequate current‑carrying capacity for power‑hungry loads such as alarm buzzers.
Performance Advantages
- High Thermal Resistance – Tg ≥150°C (157°C typical), fully compatible with lead‑free reflow soldering
- Dimensional Stability – Low Z‑axis CTE (37–40 ppm/°C) minimizes interlayer stress under temperature cycling
- Superior Electrical Performance – Low dissipation factor (Df = 0.015) ensures signal transmission quality
- High Reliability – Td of 346–352°C prevents resin decomposition during high‑temperature soldering
- UL94 V‑0 Flammability – Meets stringent fire‑safety requirements
Manufacturing Process
UGPCB manufactures EV alarm PCBs in full compliance with IPC‑6012 quality control requirements:
① Raw Material Cutting → ② Drilling (min. hole 0.33 mm) → ③ Electroless Copper / Panel Plating → ④ Pattern Transfer (line width/spacing 0.36/0.44 mm) → ⑤ Pattern Plating → ⑥ Etching → ⑦ Solder Mask (green) → ⑧ Legend Printing (white) → ⑨ Surface Finish (lead‑free HASL) → ⑩ Routing / Profiling → ⑪ Electrical Test → ⑫ Final Inspection & Packaging
PTH copper plating quality is especially critical. Per IPC‑6012 Class 2 requirements, average plated copper thickness in vias must be no less than 20 μm, with no point below 18 μm. UGPCB strictly enforces these standards to ensure every via’s long‑term reliability.
Application Scenarios
This PCB is purpose‑built for electric vehicle anti‑theft alarm systems, with primary applications including:
- E‑bikes / E‑scooters – Core PCB component for anti‑theft alarms
- New Energy Vehicles (NEVs) – Security alarm system control boards
- Electric tricycles – Anti‑theft and remote monitoring
- General vehicle security – Automotive anti‑theft alarm systems
Modern alarms have evolved from simple audible/visual warnings to smart systems integrating Bluetooth 5.3 and APP‑based remote control, placing ever‑higher demands on PCB signal integrity and electrical performance.
Why Choose UGPCB for Your EV Alarm PCB?
✅ Internationally Certified Laminate – Kingboard KB6165F high‑Tg FR‑4, meeting IPC‑4101E/99 and /126
✅ Automotive‑Grade Reliability – UL94 V‑0 certified, satisfying stringent automotive electronics requirements
✅ Precision Process Control – Minimum hole 0.33 mm, line width/spacing 0.36/0.44 mm for fine‑pitch routing
✅ Environmental Compliance – Lead‑free HASL surface finish, fully RoHS‑compliant
✅ One‑Stop Service – Full support from PCB design and fabrication to PCBA assembly
✅ Industry Expertise – Years of PCB manufacturing experience with deep understanding of automotive electronics quality standards
Get a Quote and Samples Today
UGPCB offers quick‑turn prototyping and volume production for electric vehicle alarm PCBs.
📞 Hotline: Contact UGPCB official customer service for the latest pricing
📧 Email: [Official email address]
🌐 Online Inquiry: Visit the UGPCB website to submit your PCB/PCBA requirements
Start your custom EV alarm PCB solution with UGPCB—where every board becomes a reliable security guardian.
Data Source Statement
The technical and market data cited in this document are derived from the following sources:
- KB6165F Material Performance Data – Cited from PCBSync Engineering Guide (KB-6165F Lead-Free High Tg FR-4: The Reliable Choice for Lead-Free PCB Production) and Kingboard Laminates official technical documentation
- IPC Standards Referenced – IPC‑6012 Qualification and Performance Specification for Rigid Printed Boards, IPC‑2221 Generic Standard on Printed Board Design, IPC‑4101 Specification for Base Materials for Rigid and Multilayer Printed Boards
- EV Alarm Market Data – Cited from 2025 and Next 5 Years China Electric Vehicle Alarm Market Status Analysis and Forecast Report
- UL94 Flammability Rating – Cited from UL94 Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances
Data as of August 2026. All technical parameters are based on publicly available technical data and industry standards. For the latest pricing and technical consultation, please contact UGPCB official.
