RK203 20mm Size Metal Shaft Type EC20A Heavy rotation torque and good operational feel, available in potentiometer and encoder types ■ Typical Specifications Specifications Potentiometer Encoder Items 0.05W 1mA 5V DC Total resistance tolerance ±20％ ーー 50V AC, 30V DC ーー Maximum operating voltage 40±20mN・m Operating life 30,000 cycles Operating temperature range −40℃ to ＋85℃ −30℃ to ＋80℃ Slide Potentiometers Detent torque Rotary Potentiometers Rating Products Line Potentiometer Mounting directio Operating section Singleunit Vertical type Flat Length of Number of operating positions section（mm） 30 Rotational Total resistance Resistance （k Ω） angle taper 17 220° 10 B Minimum order unit（pcs.） Japan Expert 400 800 Products No Drawing No. RK203111000V 1 Products No Drawing No. EC20A1820401 2 EC20A1824401 3 Metal Shaft Number of resistor elements Encoder (Incremental Type） Shaft configuration Length of operating section（mm） Number of detent Number of pulse Vertical type Flat 30 18 18 Travel of push-on switch（mm） Minimum order unit（pcs.） Japan Expert 400 800 — Note Knob Operating 1.5 Insulated Shaft Mounting directio . Only the encoder type can be supplied with a push-on switch. 1 2. Shaft design and other features are customizable. Ring Type Packing Specifications Tray Number of packages（pcs.） 1 case /Japan 1 case /export packing Export package measurements （mm） 400 800 374×508×272 Dimensions Photo 3.5 ø20.2 30 8 10 12 18.4 2.6 Mounting surface 3.5 15.5 ø3 1.5 NC 1 3 10 2 NC 2 NC 1 NC 3 9 9 C1 8.3 M9×0.75 1.5 1.5 1 2.5 4.5 ø6 RK203 Without switch type Potentiometer type PC board mounting hole dimensions （Viewed from mounting side ） Style 19.2 No. 3-ø1.2hole 1.25 6.25 3.75 3-1 (17.8) Refer to P.339 for for encoder switch specifications.. Refer to P.339 for attached parts. Refer to P.349 for soldering conditions. 337 RK203 20mm Size Metal Shaft Type EC20A Dimensions Unit:mm Photo PC board mounting hole dimensions （Viewed from mounting side） Style 3.5 8 30 10 ø20.2 12 18.4 3.5 15.5 9 A CB A C B NCNC NC 10 8.3 1.5 2 C1 M9G0.75 1.5 19.2 ø6 4.5 1.5 ø3 3-ø1.2 hole Slide Potentiometers 1.25 3.75 3-1 (17.8) 1.5 ø20.2 18.4 M9G0.75 1.5 3.5 C1 5 19.2 4.5 ø6 3 9 Metal Shaft 2.5 12 D A C B NC NC NC ø3 15.5 1.5 E ACB 10 Switch travel 30 7 10 9 10 2.6 3.5 Mounting surface 1.5 EC20A With push-on switch (travel 1.5mm), Incremental type 6.25 8.3 Rotary Potentiometers 2.6 Mounting surface 2.5 EC20A Without switch type, Incremental type 9 No. 5– ø1.2 hole Insulated Shaft 1.25 3.75 D E 3–1 (SW01) E D (17.8) 6.25 2-0.9 (SW02) Knob Operating Output wave（EC20A） Sliding noise（EC20A） Signal A（Terminal A–C） Clockwise B（Terminal B–C） ※ A（Terminal A–C） Counter-clockwise B（Terminal B–C） ※ OFF Output ON OFF ON OFF ON OFF ※ Signal B output at detent positions is not specified 3 2 1 338 R Output waveform 5V DC t R Terminal A Terminal B t V1 V2 Encoder Terminal C Measurement condition : Rotation speed 360˚/s ON OFF ON Sliding direction t : Masking time to avoid chattering ON The dotted lines indicate detent positions Circuit Diagram（RK203） Test circuit 5V Ring Type V1=V2=2.5V max. Shaft rotational Direction At R ＝ 5kΩ Chattering：8ms max., Bounce：5ms max. 20mm Size Metal Shaft Type / Switch Specifications The attached switch can be used with only encoder types. Momentary push switch Contact arrangement Single pole and single throw（Push-on） Travel（mm） 1.5±0.5 Operating force 4±2N Operating life 20,000times 0.5A 16V DC (1mA 5V DC min. rating) Contact resistance 100mΩ max. for initial period, 200mΩ max. after operating life. Insulation resistance 100MΩ min. 250V DC Voltage proof 300V AC for 1 minute or 360V AC for 2s Unit:mm Nut Washer 2 ø14 0.5 Knob Operating 11 Insulated Shaft The following parts are included with the product. Metal Shaft 20mm Size Metal Shaft Type / Attached Parts Slide Potentiometers Electrical performance Rating Rotary Potentiometers Switch type ø9.1 Ring Type M9×0.75 339 Metal Shaft Potentiometers List of Varieties Type Series Number of resistor elements 16mm size 20mm size RK163 RK203/EC20A 27mm size 50mm size Rotary motor-driven RK271 RK501 RK168 Dual/quad Dual/quad/5-ganged/6-ganged Single-shaft Single/dual Single Horizontal Vertical Single/dual/quad Photo Terminal mounting Horizontal Rotary Potentiometers Fixing method of bushing Bushing screw clamp Slide Potentiometers Operating temperature range −10℃ to ＋70℃ RK203：−40℃ to ＋85℃ EC20A：−30℃ to ＋80℃ −10℃ to ＋70℃ Operating life 15,000 cycles 30,000 cycles 15,000 cycles Available for automotive use — 〇 — Total resistance （k Ω） 5, 10, 20, 50, 100, 200 10 5, 10, 20, 50, 100, 250 Resistance taper 15A, 1B, 3B, 15C B Rated Power 0.1W 0.05W（15A） — — Life cycle (availability) Metal Shaft Residual resistance Insulated Shaft Knob Operating Insulation resistance Ring Type Voltage proof 15A, 3B 0.05W R≦10kΩ 20Ω max. 10kΩ＜R≦50kΩ 30Ω max. 50kΩ＜R＜3MΩ Nominal total resistance of 0.1% or less% — 5kΩ≦R＜ 10kΩ 70dB min. Maximum Electrical 10kΩ≦R＜ 50kΩ 80dB min. attenuation performance 50kΩ≦R＜100kΩ 90dB min. （Volume control） 100kΩ≦R 100dB min. Gang error applicable to Dual-unit parts for audio volume control purposes −40dB to 0dB 3dB max. — 100MΩ min. 500V DC 10MΩ min. 250V DC 500V AC for 1minute 0.1W 0.05W R≦10kΩ 20Ω max. 10kΩ＜R＜50kΩ 30Ω max. 50kΩ≦R Nominal total resistance of 0.1% or less% — — 5kΩ≦R＜ 10kΩ 70dB min. 10kΩ≦R＜ 50kΩ 80dB min. 50kΩ≦R＜100kΩ 90dB min. 100kΩ≦R 100dB min. 120dB min. 5kΩ≦R＜ 10kΩ 70dB min. 10kΩ≦R＜ 50kΩ 80dB min. 50kΩ≦R＜100kΩ 90dB min. 100kΩ≦R 100dB min. −70dB to −60dB 3dB max. −60dB to 0dB 2dB max. −100dB to 0dB 2dB max. −60dB to −40dB 5dB max. −40dB to 0dB 3dB max. 100MΩ min. 500V DC 100MΩ min. 250V DC 500V AC for 1minute 300V AC for 1minute 300V AC for 1minute Center-taps Mechanical performance 10, 20, 50, 100 Without Detent Without, Center, 21, 31, 41 17 Without, Center, 21, 31, 41 Stopper strength 0.9 0.5 0.9 Push-pull strength 100N max. Without 1.5 0.9 150N max. 100N max. 10 to 55 to 10Hz/min., the amplitude is 1.5mm for all the frequencies, in the 3 direction of X, Y and Z for 2 hours respectively Vibration Shaft style Serrated type, Flat type, Slotted type Terminal style Insertion, Lead Attached switch — EC20A: Momentary push switch Page 332 337 Flat type Slotted type, Flat type Slotted type Flat type — — — 340 344 346 Insertion Metal Shaft Potentiometers Soldering Conditions ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 349 Potentiometers Cautions・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 427 Potentiometers Measurement and Test Methods・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 429 Potentiometers Resistance Taper・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 431 Note ○ Indicates applicability to some products in the series. 312 Metal Shaft Potentiometers / Soldering Conditions Reference for Manual Soldering Series No. of solders RK09L, RK097 350℃ max. 3s max. 1 time RK203 300℃ max. 3s max. 1 time RK119 350±10℃ +1 s 3 0 1 time RK271 350℃ max. 5s max. 1 time RK501 350±10℃ +1 s 5 0 1 time RK163 350℃ max. 5s max. 1 time Potentiometer terminal 300℃ max. 3s max. 1 time Motor terminal 350℃ max. 2s max. 1 time RK168 Slide Potentiometers Soldering time Rotary Potentiometers Tip temperature Reference for Dip Soldering Preheating Soldering surface Heating time temperature Series RK501 No. of solders 100℃ max. 2 min. max. 260±5℃ 5±1s 2 time max. 120±10℃ 2 min. max. 260±5℃ 5±1s 2 time Metal Shaft RK09L, RK097, RK203 Dip soldering Soldering Soldering time temperature Insulated Shaft Example of Reflow Soldering Condition Temperature profile A B 200 C D Ring Type Temperature (˚C ) Knob Operating 300 100 Room temperature Time (s) Pre-heating E max. F max. G max. H max. Series RK119 A B C D E F G H No. of reflows 260℃ 230℃ 180℃ 150℃ 2 min. 3s 40s 4 min. 2 time max. Notes 1. When using an infrared reflow oven, solder may sometimes not be applied. Be sure to use a hot air reflow oven or at type that uses infrared rays in combination with hot air. 2. The temperatures given above are the maximum temperatures at the terminals of the potentiometer when employing a hot air reflow method. The temperature of the PC board and the surface temperature of the potentiometer may vary greatly depending on the PC board material, its size and thickness. Ensure that the surface temperature of the potentiometer does not rise to 250℃ or greater. 3. Conditions vary to some extent depending on the type of reflow bath used. Be sure to give due consideration to this prior to use. 349