Overview
The PL502-37QC-R is a high-performance power line filter and surge suppressor designed for industrial power supplies, automation equipment, and high-reliability electronic systems. This device effectively protects downstream electronic equipment and improves system stability and immunity by suppressing power ripple, high-frequency interference, and surge voltage .
The PL502-37QC-R integrates common-mode/differential-mode filtering to reduce EMI (electromagnetic interference) and RFI (radio frequency interference) while maintaining low voltage drop characteristics to ensure system power efficiency. It is widely used in industrial control power supplies, medical instruments, communication equipment, network servers, and high-end consumer electronics .
Core parameters
| Parameter Items | Specification |
| Product Type | Power line filter/surge suppressor |
| Rated voltage | 250V AC / 300V DC |
| Rated current | 2A – 5A (typical value, depending on model) |
| Frequency range | 50Hz – 400Hz (Industrial power frequency) |
| Common-mode rejection ratio (CMRR) | >40 dB (10kHz–100kHz) |
| Differential mode suppression | >30 dB |
| Operating temperature range | -40°C ~ +125°C |
| Encapsulation type | Plug-in type / PCB mounting / QC terminal block |
| Surge suppression capability | 1.5 kV (line to line) |
| Security Certification | UL, CSA, VDE (depending on the specific model) |
Features
- High-efficiency filtering
- It supports common-mode/differential-mode filtering, which can suppress high-frequency interference from the power supply and reduce EMI and RFI.
- Surge protection
- Integrated surge suppression circuitry can withstand transient overvoltages and protect sensitive electronic components.
- Wide operating voltage and current range
- Suitable for 100–250V AC industrial and commercial power systems, with a maximum current support of 5A.
- Industrial-grade reliability
- With its high temperature resistance, moisture resistance, and vibration resistance design, it can work in industrial environments for extended periods.
- Low voltage drop design
- It ensures efficient power transmission while effectively filtering out high-frequency noise.
- Easy to install
- Plug-in or PCB mounting design for quick deployment to the power inlet.
Typical application scenarios
- Industrial automation equipment
- PLC power supply, industrial servo control, sensor power protection.
- Medical instruments
- Precision measuring equipment, monitors, and imaging equipment.
- Network and communication equipment
- Server power modules, switches, and communication base station power inputs.
- Consumer electronics and home appliances
- High-end audio equipment, smart home appliance controllers, and UPS power filtering.
- Power module and adapter protection
- Power input filtering and surge protection extend module lifespan.
Performance Comparison
| Index | PL502-37QC-R | Similar filters (reference models) |
| Rated voltage | 250V AC / 300V DC | 250V AC |
| Maximum rated current | 5A | 3A |
| Common-mode rejection ratio | >40 dB | 35 dB |
| Differential mode suppression | >30 dB | 25 dB |
| Surge protection | 1.5 kV | 1 kV |
| Operating temperature | -40°C ~ +125°C | -25°C ~ +85°C |
The PL502-37QC-R is significantly superior to similar products in terms of filtering efficiency, surge suppression capability, and industrial temperature adaptability .
Manufacturer Profile
The PL series filters are supplied by several industrial power supply and electronic component manufacturers (such as Schurter, Panasonic, TDK, etc.), focusing on power management, interference immunity, and protection solutions . The PL502-37QC-R is renowned for its high reliability, strong interference immunity, and industrial-grade application experience , and is widely used in industrial and commercial electronic equipment.
Why choose PL502-37QC-R?
- High-efficiency common-mode/differential-mode filtering reduces power supply noise.
- Integrated surge suppression function to protect sensitive electronic components
- Wide operating voltage and current range, suitable for a variety of power supply systems
- Industrial-grade operating temperature (–40°C ~ +125°C)
- Easy to install and deploy via plug-in or PCB
- High reliability, compliant with UL, CSA, and VDE safety certifications.
Frequently Asked Questions (FAQ)
Q1: Is PL502-37QC-R suitable for high-frequency switching applications?
This relay has good electrical and mechanical life and is suitable for medium-frequency switching operations. In applications with extremely high frequencies or rapid repetitive actions, contact wear needs to be assessed in conjunction with the specific load and coil voltage.
Q2: Can it be used for industrial power supply or load control?
Yes. The PL502-37QC-R features high contact current ratings (typically 5~8A) and good isolation performance, making it ideal for industrial power management, load switching, and automation control applications, with high reliability.
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Product Details: Win Source – PL502-37QC-R
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