RK271 27mm Size Metal Shaft Type High performance potentiometer with excellent operational feel ■ Typical Specifications Items Specifications Total resistance tolerance ±20％ Maximum operating voltage 30V AC Rotary Potentiometers Total rotational angle Rotational torque 8 to 35mN・m Slide Potentiometers Operating life 15,000 cycles 300°±3° Operating temperature range −10℃ to ＋70℃ Product Line Number of resistor elements Mounting direction Shaft type Length of the shaft L1（mm） Center detent Total resistance Resistance Minimumorder unit（pcs.） （k Ω） taper Japan Export Metal Shaft RK2711120026 31 Single-unit 25 Drawing No. 1 RK271111001T Slotted Insulated Shaft 20 Horizontal type Products No. 100 25 15A 100 500 RK27112A00AK 2 RK27112A00CC Without Dual-unit Knob Operating 20 RK27112A0A16 25 RK27112A00B9 Flat 3 Note Other varieties are also available. Refer to "Other Specifications" (P.342). Ring Type Packing Specifications Bulk Number of resistor elements/ Shaft length Single-unit / 25mm Dual-unit / 20mm Dual-unit / 25mm Number of packages（pcs.） 1 case /Japan 1 case /export packing Export package measurements（mm） 380×540×314 100 500 360×510×359 Refer to P.341 for attached parts. Refer to P.342 for other specifications. Refer to P.343 for ordering products not listed. Refer to P.349 for soldering conditions. 340 RK271／27mm Size Metal Shaft Type Dimensions Unit:mm No. Photo PC board mounting hole dimensions （Viewed from mounting side） Style Single-shaft, single-unit RK27111 Not specified slotting angle 27 25 15.3 5 10 1.6 Single-shaft, dual-unit RK27112 L1 20 12.5 12 ø3 4 M8G0.75 2 3-ø1.2 hole 1 2 3 1 Slide Potentiometers C0.5 R1 5 5 24.5 1 ø6 1 Mounting surface Rotary Potentiometers 7 25 25.3 Not specified slotting angle L1 Mounting surface 27 5 L1 20 6-ø1.2 hole 4 C0.5 2 M8G0.75 1 1 2 3 25 ﾟ Mounting surface 10 Knob Operating Single-shaft, dual-unit RK27112 R1 12.5 ø3 R2 Insulated Shaft 12 24.5 5 5 1 ø6 2 10 10 1.6 Metal Shaft 7 5 5 5 Ring Type 3 6–ø1.2 hole × 27mm Size Metal Shaft Type / Attached Parts The following parts are included with the product. Nut 11 Unit:mm Washer 2 ø14 ø8.1 0.5 外形図 RK27112A-RV6-寸法図.EPS M8×0.75 341 27mm Size Metal Shaft Type / Other Specifications In addition to the products listed, we can accommodate the follow specifications. Products Specification Rotary Potentiometers Type Model Single-shaft, single-unit RK27111 Single-shaft, dual-unit RK27112 Single-shaft, quad-unit RK27114 Mounting height（mm） Detent variety 12.5 Center 21 31 41 Gang error — −60dB to 0dB within 3dB −80dB to −60dB within 5dB possible depending on total resistance and taper. Total Resistance Variety Slide Potentiometers Total resistance（kΩ） 5 10 20 50 100 250 Resistance Taper Resistance taper 15A 3B Metal Shaft Dimensions of Shaft 1）Slotted type Unit:mm Insulated Shaft Not specified slotting angle L1 7 L1 1.6 1 Knob Operating 15 ø6 20 25 30 C0.5 M8G0.75 Ring Type 2）Flat type Unit:mm L1 ˚ R1 60 ø6 4.5 7 M8G0.75 Shaft shown in full CCW position L1 R1 15 7 20 12 25 12 30 12 C1 Note Marked are specifications recommended by Alps. 342 Refer to P.341 for attached parts. Refer to P.343 for ordering products not listed. 27mm Size Metal Shaft Type / Ordering Products Not Listed When ordering product varieties that are not listed, specify referring to the examples below. Sample Part Number R K 2 7 1 1 2 A 0 S 2 5 C 0 A 1 0 4 Model type Model type 111 Single unit 112 Single unit, with detent Dual unit for vol. Quad-unit for vol. Slide Potentiometers 12A 14A Rotary Potentiometers Code Shaft type Code Shaft type F Flat S Slotted Code Metal Shaft Length of the shaft L1（mm） Length of the shaft 15 20 25 25 30 30 Insulated Shaft 15 20 Detent C0 Without C1 Center 21 21 31 31 41 41 Ring Type Code Knob Operating Detent 70 60 50 40 3B ) 30 l)( 3B 80 20 ro V 90 on t 15A 10 0 A) 15 A( ol. c A 100 V (v Resistance taper Output volt.across term.1-2 100 (%) Input volt. across term. 1-3 G Code J Resistance taper 10 Term."1" 20 30 40 50 60 70 Rotation travel (%) 80 90 100 J Term."3" Total resistance Total resistance （k Ω） Code 502 5 503 50 103 10 104 100 203 20 254 250 Code Total resistance （k Ω） Note Marked are specifications recommended by Alps. 343 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