MINIATURE SWITCHES Sub Miniature Pushbutton Switches for Printed Circuit Boards -- Wave Solderable Series B8000 PCB Pushbutton Switches SPECIFICATIONS * * * * Mechanical life -- 500,000 operations minimum Contact resistance -- 25 milliohms maximum Dielectric strength -- 1000 VAC rms Ambient temperature range -- -20C to +70C * * Weight -- 0.06 ounces (1.7 grams) Electrical life -- 100,000 operations minimum. Schematic -- Pushbutton PCB Switches SELECTION TABLES (Bold Face Type indicates items normally in Distributor Stock) Catalog No. By Terminal Type Note: Optional Snap-On button must be ordered separately Poles & Throw 2 Circ. Operation Momentary or Latch Down Momentary or Latch Down Momentary OPTIONAL BUTTON CAPS Right Angle P.C. Stand P.C. Mount Up Mount .220" .160" .120" (5.6 mm) (4.1 mm) (3.1 mm) Button Cap Color Black Red Catalog Number P281B P281R B8103 CURRENT RATINGS B8500 B8600 6 VDC 1 B8500/B8600 For Latch-Down, depress plunger and rotate 30 clockwise. Nominal Rating, Amperes 12 VDC 28 VDC 1 0.5 125 VDC 0.5 NOTE: For special .5 VA max. rating @ 28 VAC or DC contact Electroswitch. APPROXIMATE DIMENSIONS B8103, B8500 and B8600 Series "Crossed Wire" contact system eliminates bounce High Contact pressure gives low contact resistance Gold-plated shorting bar and terminals provide over 500,000 cycles low level current/ voltage operation Gold over nickel over silver over copper Drain holes permit complete flux washdown SPECIFICATIONS TYPE P281 SNAP-ON BUTTON (Optional) terminal length order B8103 Ultra-Miniature Pushbutton Switches AC and DC -- Round Base rating -- .75 amperes resistive at 125 VAC normally * Resistive open; .50 amperes resistive at 125 VAC normally closed; also rated 1.0 ampere normally open for 15,000 operations and .75 amperes normally closed for 10,000 operations. For 28 VDC rating 1.5 amperes normally open for 10,000 operations and 1.0 ampere normally closed for 10,000 operations. Dry circuit rated 10 milliamperes at 30 mVDC. APPROXIMATE DIMENSIONS -- .015 minimum/.050 maximum * Pretravel Overtravel -- .030 minimum * Operating force -- 8 oz. maximum * Electrical life -- 50,000 operations minimum * Mechanical life -- 50,000 operations minimum * Materials -- contacts and terminals are gold plated copper * Mounting hardware -- One #8-40 nut supplied unassembled * SELECTION TABLE Circuit N.O. N.O. N.C. N.C. Plunger Color Red Black Black Red Catalog Number SA1RV20 SA1BV20 SA1BW20 SA1RW20 OPTIONAL BUTTON CAPS ACTUAL SIZE OPTIONAL BUTTON CAP MUST BE ORDERED SEPARATELY Button Cap Color Red Black Catalog Number SW53AA1 SW53AA2 Description .250" Slip on cap for SA1 series .250" Slip on cap for SA1 series CAUTION -- MANUAL SWITCHES ARE AFFECTED BY HEAT, CLEANING SOLVENTS AND FLUX. EXTREME CARE SHOULD BE EXERCISED DURING HAND SOLDERING AND WAVE SOLDERING TO PREVENT SWITCH CONTAMINATION. 17