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YB series

Product catalog summary

General Specifications
The Series YB Short Body Pushbuttons are designed with specific electrical and mechanical specifications. They support a power level of 3A at 125V AC, 250V AC, or 30V DC for silver contacts, and a logic level of 0.4VA maximum at 28V AC/DC for gold contacts. The contact resistance is 50 milliohms maximum for silver and 100 milliohms maximum for gold. Insulation resistance is at least 200 megohms at 500V DC, and dielectric strength is 1,000V AC minimum between contacts for one minute. The mechanical life is rated at 1,000,000 operations for momentary circuits and 200,000 for maintained circuits, with an electrical life of 100,000 operations minimum.

Materials & Finishes
The housing and bezel are made from glass fiber reinforced polyamide, while the snap-in frame is stainless steel. Contacts are made from silver alloy or brass with appropriate plating, and terminals are phosphor bronze with tin plating.

Environmental Data
The operating temperature range is -25°C to +50°C for illuminated models and -25°C to +70°C for non-illuminated models. The switches are designed to withstand humidity levels of 90-95% at 40°C for 96 hours, vibrations from 10-55Hz, and shocks of 50G.

Installation
The maximum mounting torque is 0.785Nm, and the quick connect force is 24.5N. Soldering guidelines are provided in the supplement section.

Standards & Certifications
The switches comply with UL94V-0 flammability standards and are UL and CSA certified under specific conditions.

Distinctive Characteristics
The pushbuttons offer full face or spot illumination with various LED options. They feature a combination bezel-barrier to prevent accidental actuation and are designed to be dust and oil-tight, qualifying for IP65 standards. The snap-action contacts provide shock resistance and long life.

Ordering Information
The document provides detailed ordering instructions, including options for panel seals, contact materials, and terminal types. Various LED and cap color options are available, with specific part numbers for different configurations.

Electrical Specifications for LEDs
The document details specifications for bright and super bright LEDs, including forward current, voltage, and ambient temperature ranges. It also provides guidelines for using resistors with LEDs to ensure proper operation.

Specifications for Bicolor LEDs
Key parameters include maximum forward current, typical forward current, forward voltage, current reduction rate above 25°C, and ambient temperature range. The LED circuit is isolated and requires an external power source. If the source voltage exceeds the rated voltage, a ballast resistor is required, with calculations provided in the Supplement section.

Materials and Design
The Bicolor LED AT621 is available in various configurations, including lens and insert made of polycarbonate, and seal/diffuser made of thermoplastic elastomer. Available in clear/white colors with different shapes like square, round, and rectangular.

Switch Dimensions and Mounting
The document details dimensions for various switch types, including square, rectangular, and round designs with specific measurements for bushing and snap-in mounting. Panel thickness and cutouts are specified for different mounting types. Single pole models do not have terminals 4, 5, & 6.

Optional Accessories
Accessories include dust/splash covers and protective guards, which reduce the depth of the switch behind the panel. Materials used include polycarbonate and glass fiber reinforced polyamide. The document also lists adaptors for single and double pole configurations.

Assembly Instructions
Instructions for assembling the switch and LED components are provided, including grip slot projections and top view of switch assembly. Tools available for installation, such as socket wrenches and cap extractors.

Printing and Customization
Recommendations for printing methods on lenses and film inserts are provided, with laser etching and screen printing suggested. NKK Switches offers custom legends for caps upon request.

Catalog excerpts

Series YB Short Body Pushbuttons Supplement Accessories Indicators Touch Tilt Tactiles Slides Rotaries Keylocks Programmable Illuminated PB Pushbuttons Rockers Toggles General Specifications Electrical Capacity (Resistive Load) Power Level (silver): 3A @ 125V AC or 3A @ 250V AC or 3A @ 30V DC Logic Level (gold): 0.4VA maximum @ 28V AC/DC maximum (Applicable Range 0.1mA ~ 0.1A @ 20mV ~ 28V) Note: Find additional explanation of operating range i Supplement section. _ Other Ratings Contact Resistance: Insulation Resistance: Dielectric Strength: Mechanical Life: Electrical Life: Nominal Operating Force: Contact Timing: Travel: 50 milliohms maximum for silver; 100 milliohms maximum for gold 200 megohms minimum @ 500V DC 1,000V AC minimum between contacts for 1 minute minimum; 1,500V AC minimum between contacts & case for 1 minute minimum 1,000,000 operations minimum for momentary circuit 200,000 operations minimum for maintained circuit 100,000 operations minimum Single pole: 1.47N for nonsealed; 1.67N for sealed Double pole: 2.75N for nonsealed; 2.94N for sealed Nonshorting (break-before-make) Pretravel .059" (1.5mm); Overtravel .059" (1.5mm); Total Travel .118" (3.0mm) Materials & Finishes Housing/Bezel: Snap-in Frame: Base: Movable Contactor: Movable Contacts: Stationary Contacts: Switch Terminals: Lamp Terminals: Environmental Data Operating Temperature Range: Humidity: Vibration: Shock: Sealing: Installation Mounting Torque: Quick Connect Force: Soldering Time & Temperature: Standards & Certifications Flammability Standards: UL: Glass fiber reinforced polyamide (UL94V-0) Stainless steel Glass fiber reinforced polyamide (UL94V-0) Phosphor bronze with silver or gold plating Silver alloy with silver plating or brass with gold plating Silver alloy or copper with gold plating Phosphor bronze with tin plating Phosphor bronze with tin plating -25°C through +50°C (-13°F through +122°F) for Illuminated -25°C through +70°C (-13°F through +158°F) for Nonilluminated 90 ~ 95% humidity for 96 hours @ 40°C (104°F) 10 ~ 55Hz with peak-to-peak amplitude of 1.5mm traversing the frequency range & returning in 1 minute; 3 right angled directions for 2 hours 50G (490m/s2) acceleration (tested in 6 right angled directions, with 5 shocks in each direction) IP65 of IEC60529 standard for panel seal models 0.785Nm (6.95 lbfin) maximum 24.5N maximum downward force on connector Manual Soldering: See Profile A in Supplement section. UL94V-0 housing & base File No. E44145 - Recognized only when ordered with marking on switch. Add "/U" or "/CUL" before first dash in part number to order UL recognized switch. All solder lug models recognized at 3A @ 125/250V AC or 0.4VA @ 28V AC/DC maximum. File No. 023535_0_000 - Certified only when ordered with marking on switch. Add "/C" before first dash in part number to order CSA certified switch. All solder lug models certified at 3A @ 125/250V AC or 0.4VA @ 28V AC/DC maximum.

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Short Body Pushbuttons Series YB Full face or spot illumination with incandescent lamps or multi-element LEDs, with or without resistors. Choice of super bright LEDs in white, green, and blue as well as bright LEDs in red, amber, and green. Combination bezel-barrier is an integral part of the switch and prevents accidental actuation. Unique thermoplastic elastomer seal inside caps plus rolled sleeve of nitrile butadiene rubber at joining of housing and inner case, all for added protection to interior mechanism. Dust and oil tight as well as splashproof panel seal models qualify to IP65 of IEC60529...

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TYPICAL SWITCH SPDT DPDT Panel Seal Silver Rated 3A @ 125V AC Gold Rated 0.4VA max. @ 28V AC/DC max. Solder Lug/.110” (2.8mm) Quick Connect Contact Materials & Ratings Bushing Mounting Snap-in Mounting Square Switches are supplied without UL & cULus marking unless specified. UL & cULus recognized only when ordered with marking on switch. Specific models, ratings, & ordering instructions are noted on the General Specifications page. DESCRIPTION FOR TYPICAL ORDERING EXAMPLE Touch Green, Super Bright LED Round with Bushing Mounting Black Housing SPDT ON-(ON) Circuit Led Cap with Clear Lens and White...

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Short Body Pushbuttons ORDERING EXAMPLE Incandescent Lamp Solid Cap: Lens/Insert Colors Spot Illuminated Cap: Lens/Insert Colors JA Bicolor LED for Full Face Illuminated Forward Voltage Clear/White Touch

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Series YB Short Body Pushbuttons POLES & CIRCUITS * When in latchdown position for the alternate circuit, cap position is .020" (0.5mm) above the built-in bezel. PANEL SEAL With Panel Seal Bushing Mounting Supplied with mounting nut. Snap-in Mounting Bushing Mounting only Supplied with mounting nut and o-ring AT089. SHAPES & MOUNTING TYPES Square Bushing Mounting Round Snap-in Mounting Round Bezel-barrier is an integral part of the switch body. HOUSING Black Housing available in black only. The 1-piece body and bezel-barrier have a matte finish. CONTACT MATERIALS & RATINGS Silver Contacts Gold...

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Short Body Pushbuttons Series YB Solder Lug/ .110" (2.8mm) Quick Connect Epoxy Seak (2.0) .079 _ 03 Straight PC Epoxy Seal (0.6) R_X .024 ^ Single Pole Double Pole INCANDESCENT LAMP & SOLID CAP Electrical specifications are determined at a basic temperature of 25°C. Lamp circuit is independent of switch operation. For dimension drawing of lamp see the Accessories & Hardware section. Solid Cap for Incandescent Lamp & Nonilluminated Lens/Insert Colors Available: White/White Red/White Yellow/White Green/White Blue/White Lens & Insert: Polycarbonate Seal/Filter: Thermoplastic Elastomer Translucent...

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Series YB Short Body Pushbuttons Series YB Short Body Pushbuttons SPOT ILLUMINATED CAP WITH BUILT-IN LED This spot-illuminated cap is factory assembled. AT3011 Round The electrical specifications shown are determined at a basic temperature of 25°C. LED circuit is isolated and requires external power source. Single color LEDs are colored in OFF state. Bicolor LED is translucent white in OFF state. If the rated voltage, a ballast resistor is required. The resistor value can be calculated by using the formula in the Supplement section. Single Color Single Color Lens/Insert Colors Available: Colored...

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