B3FS-4002P

Overview of Omron B3FS-4002P Tactile Switch

The Omron B3FS-4002P is a durable and reliable surface-mount tactile switch designed for modern, compact electronic assemblies. As part of the high-performance B3FS-4 series from Omron Electronics, this non-illuminated switch features a momentary OFF-(ON) function, activated by a round black actuator with a light 1.5 N operating force. Engineered for longevity, it boasts an impressive mechanical life of 3 million cycles, making it an ideal choice for high-use applications. Its compact 12mm x 12mm footprint and low 4.3mm profile allow for efficient use of PCB space in densely packed designs. With a rating of 50 mA at 24 VDC and a gull-wing SMD termination, this SPST switch is perfectly suited for user interface controls in consumer electronics, industrial control panels, telecommunications equipment, and medical devices, providing a consistent tactile feedback experience.

Manufacturer Information

Omron Electronics is a globally recognized leader in industrial automation, electronic components, and healthcare systems. With decades of innovation, Omron has established a core expertise in sensing and control technologies, manufacturing a vast portfolio of reliable switches, relays, sensors, and controllers. The company is renowned for its rigorous quality standards, engineering excellence, and commitment to providing solutions that enhance efficiency and safety across diverse industries, from factory automation to advanced medical equipment.

Key Features

• Delivers a long operational lifespan with a rated mechanical durability of 3,000,000 cycles.
• Features a compact SMD/SMT gull-wing design for efficient automated PCB assembly and space-saving layouts.
• Provides consistent tactile response with a light 1.5 N operating force for user-friendly interface design.
• Utilizes a reliable SPST contact form with a rating of 50 mA at 24 VDC for low-power circuit control.

Packaging Details

SMD/SMT Package (Dimensions: 12.0mm × 12.0mm × 4.3mm), 4-Terminal Gull Wing Lead, compatible with standard reflow soldering processes.

Equivalent / Alternative Parts

• B3FS-4000 (Omron) - Key Match: Same footprint and electrical ratings, different actuator color/force.
• TS-0227A-C (C&K) - Key Match: Similar SMD size and SPST function, suitable for cross-brand replacement.

Advantages

• Offers superior mechanical life (3M cycles) compared to many standard tactile switches, reducing long-term replacement needs.
• The gull-wing SMD termination provides better solder joint reliability and visual inspection capability versus other SMT styles.

Lifecycle Status & Updates

Status: Active; Update: No product change notifications (PCN) or discontinuance notices (PDN) are currently active, indicating stable supply.

Application Examples

• Keypad matrix in telecom devices (Low force, high cycle life)
• Control buttons on industrial HMIs (SMD mounting, 24V rating)
• Mode selection on medical monitors (Reliable SPST switching)
• Reset/function keys on consumer electronics (Compact 12x12mm size)

Technical Specifications

• Product Category: Tactile Switches
• Switch Function: Momentary OFF-(ON)
• Contact Form: SPST
• Operating Force: 1.5 Newtons
• Electrical Rating: 50 mA @ 24 VDC
• Mechanical Life: 3,000,000 Cycles
• Termination: Gull Wing Lead (SMD)
• Dimensions (LxWxH): 12.0 mm x 12.0 mm x 4.3 mm

Pinout and Functionality

• No dedicated pins. This is a 4-terminal SPST switch. Two diagonally opposite terminals are common, connecting to the other two upon actuation. Typical application: PCB-mounted user input.

FAQ Section

Q: What is the operating force?
A: 1.5 Newtons (light actuation).

Q: Is this switch illuminated?
A: No, it is a non-illuminated model.

Q: What is the mechanical lifespan?
A: Rated for 3 million actuation cycles.

Q: What is the mounting type?
A: Surface-mount (SMD/SMT) with gull-wing leads.

Q: What is the voltage rating?
A: 24 Volts DC maximum.

Q: What is the package size?
A: 12.0mm x 12.0mm footprint.