19mm 4PIN Push Button Switch Ring LED Momentary Stainless Steel for CNC/Marine | FILN

Button Switch DrawingProduct Overview

The 4 pin push button switch (Model: FLM19-FJ-2-E) is a high-performance industrial control component engineered for durability and precision. Manufactured by FILN, a leader in the switch industry, this 19mm waterproof metal switch features a premium stainless steel housing and a vibrant LED ring indicator. With certifications including ISO9001, CE, VDE, RoHS, SGS, UL, and IP65, it is designed for rigorous environments such as CNC machines, marine systems, and automation equipment. This momentary push button switch ensures reliable circuit control with silver contacts for superior conductivity. Whether you need a 12V LED button or a 220V industrial switch, our 4-pin terminal design provides a secure and efficient connection for various electrical control panels.

Quick Specifications

Model Number	FLM19-FJ-2-E
Mounting Hole Size	19mm (0.75 inch)
Operation Function	Momentary (Self-Reset)
LED Color	Red / Green / Yellow / Blue / White (Bi-color/Tri-color Customization)
Button Head Shape	Flat Head
Terminal Type	4-Pin Plug-in Terminal (2.8x0.5mm)

Performance Parameters

Rated Voltage	36V DC / 250V AC
Rated Current	5A DC / 5A AC
Rated Power	180W (DC) / 1250W (AC)
Insulation Resistance	≥ 1000MΩ
Dielectric Strength	1800V
Contact Resistance	< 50mΩ
LED Voltage Range	3V - 220V (12-24V / 110-220V Standard)
Certifications	ISO9001, CE, VDE, RoHS, SGS, UL, IP65

Component Materials

Button / Actuator	304 Stainless Steel / 6063 Aluminum Alloy
Shell / Housing	H59 Brass / 304 Stainless Steel
Internal Base	PA66+GF20% Flame Retardant Nylon
Contacts	Silver Alloy (AgCdO12)
Pins	H62 Brass Alloy
Sealing Ring	SIL Silicone (Waterproof)

General Characteristics

Operating Temperature	-25°C to +85°C
Protection Level	IP65 (Waterproof), IK08 (Vandal-Proof)
Mechanical Life	500,000 Cycles
Electrical Life	100,000 Cycles (250V/3A)

LED Optical/Electrical Characteristics

Forward Current	20mA (Typical)
Light Intensity	1000 mcd
Color Temperature (White)	8400K
Luminous Flux	4.8 lm
Max Soldering Temp	260°C (within 5s)

Key Features

• Superior Durability: Rated IP65 and IK08, this 19mm metal switch is dust-proof, waterproof, and resistant to impacts, making it ideal for harsh industrial environments.
• High Load Capacity: Supports up to 5A 250V AC/DC, allowing direct control of high-power equipment without the need for intermediate relays.
• Premium Material Selection: The 304 stainless steel shell offers exceptional corrosion resistance, suitable for medical and marine engineering.
• Silver Contact Technology: Utilizes AgCdO12 silver contacts to ensure low contact resistance (< 50mΩ) and minimize electrical arcing.
• Ultra-Compact Design: With a total length of approximately 26.5mm, it is perfect for space-constrained control panels and handheld devices.

Industrial Applications

This round push button switch is widely utilized across various sectors:

• Industrial control panels
• CNC machines
• Automation equipment
• Electrical cabinets
• Marine systems
• Medical devices
• Security systems
• Access control buttons

Installation Steps

1. Drill a 19mm diameter mounting hole in the control panel.
2. Insert the 4 pin button switch through the hole from the front.
3. Slide the waterproof O-ring and the metal hex nut from the back of the panel.
4. Tighten the hex nut to secure the switch body firmly to the panel.
5. Connect the wiring terminals according to the desired LED mode (Always ON or Synchronized).

4 Pin Push Button Switch Wiring Diagram

A 4-PIN switch consists of two parts: Switch Contacts (to control the device) and LED Terminals (marked with + and -). Below are two ways to wire the LED indicator.

• Horizontal Pins: The switch mechanism (Power In / Load Out).
• Vertical Pins (+ / -): The LED indicator light terminals.

Method 1: LED Synchronized with Device (On when Active)

Logic: The button light only turns ON when the device is running. It serves as a "Status Indicator."

• Wiring: Connect LED (+) to the Output side of the switch. LED (-) to Power Negative.
• Applications: Power start buttons, car fog lights, industrial machinery.
• Benefit: Saves power; provides visual feedback that the system is active.

Figure 1: LED turns ON only when button is pressed

Method 2: LED Always ON (Backlight Mode)

Logic: The button light stays ON constantly as long as there is power, regardless of the button position.

• Wiring: Connect LED (+) directly to the Power Positive. LED (-) to Power Negative.
• Applications: Dark environments, hallway switches, standby power indicators.
• Benefit: Allows you to find the switch easily in total darkness.

Figure 2: LED stays ON constantly (Backlight)

Mode	LED Status (Idle)	LED Status (Pressed)
Sync (Status)	OFF	ON
Always ON (Backlight)	ON	ON

Industry Knowledge

What is a 4-Pin Push Button Switch?

A 4-pin push button switch is a fundamental component in industrial electronics. It separates the switching circuit (2 pins) from the indicator circuit (2 pins for the LED). This design allows for independent control of the light, which can act as a status indicator or a constant backlight. In FILN products, these switches are often built with metal shells for enhanced RFI shielding and mechanical strength.

Latching vs. Momentary Function

Feature	Momentary (Self-Reset)	Latching (Self-Locking)
Operation	Springs back when released	Stays in place until pressed again
Best For	PC Power, Horns, Doorbells	Main Power, Light Switches

LED Color Meanings

• Red: Emergency, Stop, Error.
• Green: Normal operation, Start, Safety.
• Yellow: Warning, Standby, Pre-heating.
• Blue: Specific functions, Manual mode.
• White: High-visibility neutral indicator.

Terminal Type Comparison

Type	Advantages	Best Use Case
Pin Terminal (4-Pin)	Fast assembly with connectors	Mass production/Control panels
Screw Terminal	Very secure, no soldering needed	Field maintenance/Thick cables
Pre-Wired	Plug-and-play, saves time	DIY/Prototyping

FILN Factory Direct Advantage

As a specialized manufacturer, FILN provides flexible solutions for global B2B industrial sourcing:

• ✅ No MOQ: Small orders welcome for testing and prototyping.
• ✅ Fast Delivery: Global shipping with short lead times.
• ✅ Customization: Voltage (3V-220V), Wire length, and Connectors.
• ✅ Certified Quality: Full CE/RoHS/UL compliance.

Get Free Sample Now

Official Website: www.filn.com
Contact Email: [email protected]
View All: All Push Button Switches

Frequently Asked Questions

Q1: Is the 19mm 4-pin switch waterproof?
A: Yes, it is IP65 rated, making it resistant to water splashes and dust, suitable for outdoor use.

Q2: Can I use this 4-pin LED button for a 110V circuit?
A: Yes, we offer LED voltage customization from 3V to 220V AC/DC. Please select the 110V version when ordering.

Q3: What is the difference between a 4-pin and a 5-pin switch?
A: A 4-pin switch has one set of normally open contacts + 2 LED pins. A 5-pin switch typically offers NO/NC (Common, Normally Open, Normally Closed) plus 2 LED pins.

Q4: Do you support custom wire harness for these switches?
A: Yes, FILN provides wire length and connector customization to meet your specific assembly requirements.

Q5: Can I get a free sample for testing?
A: Absolutely! Please contact our sales team at [email protected] for sample requests.

Q6: What is the material of the metal shell?
A: The standard material is 304 stainless steel, but we also offer H59 brass and aluminum options.

Q7: Is the LED ring always illuminated?
A: It depends on your wiring. You can wire it to be "Always ON" or "Only when pressed."

Q8: How many cycles will this switch last?
A: It has a mechanical life of 500,000 cycles and an electrical life of 100,000 cycles at 3A load.

Q9: What is the mounting hole size required?
A: It requires a standard 19mm (approx. 3/4 inch) diameter round hole.

Q10: Does FILN provide bulk pricing for industrial buyers?
A: Yes, we specialize in B2B supply and provide competitive tiered pricing for factory orders.