1. Specifications

The EH Miniature Lighted Pushbutton Switch features multiple contact configurations including Normally Open (NO), Normally Closed (NC), and Common (C) terminals. It supports electrical ratings up to 600V AC RMS between NC and NO, and 1500V AC RMS between terminals and ground, tested at 50/60Hz for 60 seconds. Contact resistance is low, with silver contacts under 30mΩ and W/E alloy contacts under 50mΩ. Insulation resistance exceeds 100MΩ at 500V DC, and dielectric strength is rated at 1000V AC RMS between NC and NO terminals. Mechanical life ranges from 200,000 operations (alternate action) to over 2 million (momentary action), with electrical life exceeding 100,000 operations at maximum load. Operating conditions include temperatures from -15°C to +50°C and humidity up to 80% RH. The operating force is a maximum of 4.41N with a 3mm travel distance.

2. Features

Key features include silver contacts with gold plating and W/E Alloy #1 cross-bar contacts for durability and tactile feedback, a precision snap-action mechanism with coil spring, and compact button sizes (14.2mm square and 14.2×20.4mm rectangular). The light cartridge is front-removable for easy maintenance. Built-in resistors are available for 5V and 12V DC (not for 24V). LED illumination options cover a wide color range (Hi-Bright Super Blue, Super White, Super Green, Red, Green, Yellow) and various illumination types such as full-face, split-face, dual-color, spot, and lamp. The design is compact with only 22.5mm depth behind the panel.

3. Electrical and LED Ratings

LED forward current and voltage vary by color and type, typically ranging from 5mA to 20mA. External resistor values for non-built-in resistor types are calculated using the formula R = (Vcc - VF) / IF. LED duty cycles and pulse widths are specified for optimal performance. Lamp life is approximately 5000 hours for AC use and 2500 hours for DC use at temperatures below 50°C.

4. Mechanical Dimensions and Structure

Detailed mechanical dimensions are provided for square and rectangular buttons, light cartridges, filters, and housings with ±0.4mm tolerance. Terminal shapes and layouts support soldering and tab connections. Internal wiring diagrams for various LED illumination types (full-face, split-face, dual-color) are included to assist in correct assembly and wiring.

5. Accessories

Accessories include side and center barriers to prevent accidental activation and separate switches in group mounting, guard covers with spring return mechanisms (180° for square, 90° for rectangular), dust-proof covers for panel thicknesses from 1.0 to 3.2mm, sockets for easy switch replacement, and matrix fitting frames for mounting multiple switches in arrays.

6. Assembly and Disassembly Procedures

Procedures cover removal and fitting of light cartridges and buttons using clips and grooves, installation of filters and dividers for split-face buttons, fitting lamps and light cartridges with audible click confirmation, mounting switches on panels with frames and barriers, installing guard and dust-proof covers with proper alignment, and socket insertion ensuring correct MULON mark orientation.

7. Panel Layout and Mounting

Panel cut dimensions and layouts are specified for square and rectangular buttons with ±0.4mm tolerance. Recommendations for spacing when mounting switches in groups with or without barriers are provided. Instructions for converting horizontal mounting to vertical orientation include rotating retaining clips or using long retaining clips for rectangular types. Compatible panel thickness ranges from 1.0 to 3.2mm.

8. Important Notes and Recommendations

Panel cut dimensions should be finalized after panel painting to ensure proper fit. Use of barriers and guard covers is advised to prevent accidental activation, especially in serial mounting. For LED operation without built-in resistors, appropriate external resistors must be installed according to provided tables and formulas. Simultaneous lighting of multiple LEDs is possible but requires careful resistor selection. Correct polarity and connection of LED terminals are critical to avoid damage.

Additional Overview and Ordering Information

The document also details button shapes (rectangular, square, dimple), illumination types (dual-color, split-face horizontal/vertical, full-face), and LED colors (Super Green, Super White, Super Blue, Yellow, Green, Red). Contact types include DPDT and SPDT with W/E Alloy or silver gold-plated contacts. Operation modes cover flat indicator, indicator, alternate, and momentary actions. LED supply voltages supported are 5V, 12V, and 24V with options for built-in or non-resistor types. For split-face non-resistor types, a universal selection code is used for all voltages. Built-in resistor types are not recommended for split-face due to heating concerns.

Simultaneous lighting of dual-color LEDs is generally not feasible without external resistors or specific sockets. Recommended resistor values for simultaneous lighting are 36Ω (5V), 270Ω (12V), and 1.1kΩ (24V) with specified power ratings. For 24V dual-color, non-resistor types with external resistors or sockets are recommended. For 12V dual-color, non-resistor types with 510Ω resistor or sockets are advised for simultaneous lighting. 5V dual-color supports simultaneous lighting with built-in resistors.

Button and filter colors are specified with clear requirements for split-face and dual-color buttons. Ordering codes define button shape, illumination, LED color, supply voltage, resistor type, button and filter colors, and terminal types (#110 tab/solder, PCB connector, K connector). Light cartridges and housings can be ordered separately.

Recommendations emphasize specifying LED and filter color locations clearly in split-face configurations, avoiding heating issues by preferring external resistors, and adhering to limited color combinations. Buttons have a flat, locked level.

Summary Table Highlights

• Button Shapes: Rectangular, Square, Dimple
• Illumination Types: Dual-Color, Split-Face (Horizontal/Vertical), Full-Face
• LED Colors: Super Green, Super White, Super Blue, Yellow, Green, Red
• Contact Types: DPDT, SPDT with W/E Alloy or Silver (Gold-Plated)
• Operation Modes: Flat Indicator, Indicator, Alternate, Momentary
• Supply Voltages: 5V, 12V, 24V
• Resistor Types: Built-in, Non-Resistor (external resistor recommended for simultaneous lighting)
• Terminal Types: #110 Tab/Solder, PCB Connector, K Connector

This comprehensive technical summary facilitates correct selection, installation, and maintenance of EH series miniature lighted pushbutton switches, ensuring compatibility with electrical, mechanical, and operational requirements while addressing thermal and illumination considerations.