Precautions Precautions Safety Precautions ■ Cautions Use the DIP Switch within the rated voltage and current ranges, otherwise the DIP Switch may have a shortened life expectancy, radiate heat, or burn out. This particularly applies to the instantaneous voltages and currents when switching. ■ Do not use an automatic soldering bath or manual soldering for A6S or A6H models. Confirm in advance that flux will not bubble up onto the side of the PCB to which the Switch is mounted. Depending on the type of Switch, the flux may have an adverse effect if it enters the Switch. Correct Use PCB surface Flux surface Circuit Design Although the minimum current is 10 m A (3.5 VDC), contact reliability may need to be improved in some cases. This is particularly true when switching causes an increase in instantaneous current, such as in C-MOS IC applications. Do not let the peak current exceed the rated value here or any other time. Only BCD/hexadecimal 1-2-4-8 code is available for A6C/A6CV/ A6R/A6RV models. If BCD/hexadecimal 1-2-4-8 complement code is required, make the appropriate provisions in the circuit. Mounting Normally the default striker setting is OFF for slide-type DIP Switches and the default rotor setting is 0 for Rotary DIP Switches. Do not change these settings when mounting, soldering, washing or drying Switches. In rare cases, the striker may be deformed by heat generated during soldering. The A6S and A6H are designed specifically for reflow soldering. Do not use an automatic soldering bath or manual soldering for these models. Reflow Soldering Observe the following conditions for reflow soldering the A6S and A6H models. A6S 250 Automatic Insertion Machine Use a body stopper system for the chute stopper of automatic insertion machines. When mounting Switches using an insertion machine incorporating a half-lead stopper, make sure the machine will not deform the terminals of the Switch, or improper insertion may result. Check actual mounting conditions prior to using a half-lead stopper system. 240 Soldering temperature (°C) 150 A printed circuit board that is 1.2 to 1.6 mm thick is recommended. Holes on the PCB should be at least 0.9 mm in diameter for automatic insertion. 2 minutes max. Soldering time 20 seconds max. A6H Manual or IC Socket Insertion Commercially available insertion tools are recommended for mounting ICs on PCBs. Terminal pitch, dimensions and other features are identical to that of standard ICs for IC socket compatibility (except for the A6H and A6S). Align the terminals so they slide in simultaneously when the Switch is inserted into socket holes or into mounting holes predrilled at the specified dimensions. Apply downward force on the Switch until the terminals are properly seated on the PCB. Do not try to remove a Switch by inserting a screwdriver between it and the PCB, and then twisting the screwdriver to peel the Switch off. Use a commercially available inserter/remover to remove the Switch. Soldering Observe the following conditions when soldering the DIP Switch. General Precautions for Soldering Set the pins to OFF before soldering an A6ER DIP Switch. Before soldering the Switch on a PCB, make sure there is no unnecessary space between the Switch and the PCB. Before soldering the Switch on a multilayer PCB, conduct a test to make sure the Switch will not be deformed by soldering heat on the pattern or land of the multilayer PCB. Automatic Soldering Bath (Except A6S/A6H) Soldering temperature: 260°C max. Soldering time: 5 s max. for a 1.6-mm thick, single-side PCB 4 240 230 Soldering temperature (°C) 150 Soldering time 2 minutes max. 20 seconds max. Do not use reflow soldering for any models other than the A6S and A6H. Otherwise the plastic case may melt or deform. The soldering conditions and the temperature around the Switch may vary with the type of reflow bath. Check the temperature profile and confirm soldering conditions as well as the amount of heat applied to the Switch prior to soldering. Manual Soldering (Except A6S/A6H) Soldering temperature: 350°C at the tip of the soldering iron. Soldering time: 3 s max. for a 1.6-mm thick, single-side PCB Do not solder the Switch more than twice including any rectification soldering. An interval of five minutes is required between the first and second soldering. Precautions Precautions Washing Washable and Non-washable Models The models for which washing are possible are shown in the following table. Washable A6A, A6C, A6CV, A6D, A6DR, A6T (with seal tape), A6S (with seal tape), A6H (with seal tape) Non-washable A6R, A6RV, A6T (standard/raised actuator), A6S (standard/raised actuator), A6E, A6ER Washing Procedure Ultrasonic cleaning is not available for slide-type DIP Switches with seal tape. These models may be wiped or dipped into washing agents for one minute maximum. Slide-type DIP Switches with seal tape can be washed as long as the seal tape is not removed or pasted before washing. Non-compliance here will cause the quality of the seal to decline. Washing equipment incorporating more than one washing bath can be used to clean washable models, provided that the washable models are cleaned for one minute maximum per bath and the total cleaning time does not exceed three minutes. Washing Agents Apply alcohol-based solvents to clean washable models. Do not apply water or any other agents to clean any washable models, as such agents may degrade the materials or performance of the Switch. Washing Precautions Do not impose any external force on washable models while washing. Do not clean washable models immediately after soldering. The cleaning agent may be absorbed into the incomplete seal through respiration as the Switch cools. Wait for at least three minutes after soldering before cleaning. Do not use washable Switches submerged in water or in locations exposed to water. Handling Slide-type DIP Switch operation Do not apply excessive operating force to the Switch. Otherwise the Switch may be damaged or deformed, and the switch mechanism may malfunction as a result. Apply an operating force not exceeding 200% of the maximum rated operating force to the Switch. damage it. Do not set the DIP Switch using the point of a mechanical pencil, or lead powder or fragments may fall into the Switch and internal circuit board, causing the DIP Switch to malfunction and reducing the dielectric strength of the circuit board. Although raised-type (A6B standard type) and piano-type strikers can be operated by fingertip, do not push too hard or too fast because this will deform or damage the striker. Rotary DIP Switch Operation Incorrect Set rotary-type DIP Switches with a flat-blade screwdriver that fits into the screwdriver groove. Using a screwdriver of inappropriate dimensions, or using a tool other than a flat-blade screwdriver may cause damage to the groove that may make the Switch impossible to operate. Correct Insert the flat-blade screwdriver vertically to operate the Switch. The Switch may be damaged if the screwdriver is inserted at an angle. Set slide-type DIP Switches with a tiny, rounded object, such as the tip of a ball-point pen or a small screwdriver. Do not set the DIP Switch using tweezers or any other sharp object that may Item Do not use excessive force to operate the Switch, or it may damage or deform the Switch. A6R/A6RV Top/Side operation, flat type Screwdriver groove A6A Standard type, flat type 4 0.65 1.0 A6C/A6CV Shaft type, wheel type 4 dia. Top/Side operation type 0.7 2.5 2.9 0.8 Depth: 1.0 Depth: 0.9 Depth: 0.9 Depth: 1.0 Applicable screwdriver: A 1.8 to 2.1 3.5 to 3.8 2.0 to 2.4 Applicable screwdriver: B 0.7 to 0.8 0.4 to 0.5 0.5 to 0.6 Part names A B Flat-blade screwdriver Groove A6A, A6C/A6CV, A6R/A6RV Rotary DIP Switch Note: All units are in millimeters unless otherwise indicated. 5 Precautions ■ Precautions Packing specifications • A6S models with embossed taping specifications are shown below. 1.5 +0.4 −0.2 dia. Perforations • A6H models with embossed taping specifications are shown below. 2±0.15 1.5±0.1 dia. Perforations 16±0.15 8±0.15 4±0.15 P=4±0.15 1.75±0.1 2±0.15 B Tape drawing direction A C B±0.15 A +0.4 −0.2 (See note.) Tape drawing direction (ON side) 1.5 dia. holes 2.24 Tape drawing direction D Note: The perforations along both sides are for 8-pole Switches only. The perforations on the bottom of the diagram are not for 4- and 6-pole Switches. Tape drawing direction Applicable A6H-@102-P models Three, 2±0.15 13 dia. Applicable models A6S-@102-P Standard Conforms to JEITA. Package quantity 900 per reel 6 Label 21±0.8 dia. 330±2 dia. 13±0.5 dia. No. of poles 13 dia. 4 6 8 A +0.4 −0.2 24 24 32 B±0.15 11.5 11.5 14.2 C 11.6 16.7 21.7 D (30) (30) (38) E --- --- 28.4 Label 330±2 dia. No. of poles 4 6 8 10 Standard Conforms to JEITA. A +0.3 −0.1 12 24 24 24 Package quantity 4,000 per reel B±0.13 5.5 11.5 11.5 11.5 C (6.6) (11.7) (11.7) (14.4) D (18) (30) (30) (30)