LTR1-01

LTR1・2 & LTM1・2 Ultra-Miniature Illuminated Pushbutton Switches RoHS Compliant ■Series Conductive Rubber Contact（LTR type） Mettal Contact（LTM type） ■Features 1. Full Surface Illumination (LTM2, LTMG2, LTR2 Series Miniature, low-cost switch with full surface illumination by LED. Buttons available in square shape (7.5/10mm sq.) and round shape (7.5/10mm dia.) in 3 colors (Red, Green, Yellow). Non-illuminated switches also available (LTM1, LTMG1, LTR1 series). 2. Two Types of Contacts LTR series: Conductive rubber contact for soft tactile feel. LTM/LTMG series: Metal contact for sharp tactile feel. 3. PC Board Mount Terminal pitch is in inches (multiples of 2.54 mm) for all models. The unique terminal shape prevents the terminals from coming loose from the PC board during dip soldering. 4. Enhanced Resistance to Soldering Heat Improved terminal structure protects the contacts from soldering heat. In addition, each pole has two terminals which can be used as a jumper wire. 5. Compatible With Lead-Free Soldering (LTM Series) Heat-resistance resin for lead-free soldering. ■Specifications Rating Initial Contact Resistance LTR ：10mA 12VDC max. 10μ A Min. LTM：1VA max.（50mA max.48VDC max） 0.5mA min. LTMG：1VA Max.（50mA max.48VDC max.） 10 μ A min. LTR：500 Ω max.（1mA 2VDC at 1.47N｛150gf｝ ） LTM：100m Ω max （1.5mA 200μ VAC at 1.96N｛200gf｝ ） Dielectric Strength 250VAC 1 minute Insulation Resistance 100MΩ min Electrical Life Contact Bounce Travel Operating Force （at peak force） Operating −25∼＋70℃ Storage −40∼＋70℃ Temperature Range Temperature Range         （100VDC） LTR ：100,000 operations LTM：300,000 operations LTR ：3 msec. max.（Initial value） LTM：10 msec. max.（Initial value） LTR ：1 mm LTM：0.25 mm LTR ：0.98±0.39N LTM：1.37±0.39N LTR・LTM ■Part Numbering 2 ̶ 01 ̶ L2 LT M G Series Code Contact Plating Type of Contact ■Operating Force vs. Stroke Characteristics LED luminance Structure LED Color ■Type of Contacts and Contact Plating Code Type of Contact Contact Plating R Conductive rubber contact Gold plated M Metal contact Silver plated MG Metal contact Gold plated Note : The contacts of LTR series are all gold-plated. A図/Fig.A ■PC Hole Layouts Type LTR1/LTM1 LTR2/LTM2 ■Structure 1 Fig. 2 Dimensions （Top view） Structure Without LED （Non-illuminated） ■LLED liminance With LED ■LED Specifications  LTR2・LTM2・LTMG2 Forward V (VF) Reverse Voltage (VR) Forward Current (IF) nom. max. 30mA 2.0V 2.5V DC5V 25mA 2.2V 2.5V DC5V Yellow 30mA 2.1V 2.5V DC5V L2 Red 30mA 1.95V 2.5V DC5V L5 Green 30mA 3.2V 4.0V DC5V L8 Yellow 30mA 2.0V 2.5V DC5V Code Color L2 Red L5 Green L8 Luminance Normal High Symbol LED luminance 01 Normal luminance 31 High luminance ■Packaging Specifications Zipper Plastic Bag ■Table of Part Numbers LTM Series Silver Plated Contact plating Non-illuminated LED color 　LTM1−01 LTR Gold Plated −  LTMG1−01 Gold Plated 　LTR1−01 − Red 　LTM2−01−L2 　LTM2−31−L2 ★LTMG2−01−L2 　LTR2−01−L2 　LTR2−31−L2 Green 　LTM2−01−L5 　LTM2−31−L5 ★LTMG2−01−L5 　LTR2−01−L5 　LTR2−31−L5 Yellow 　LTM2−01−L8 　LTM2−31−L8 ★LTMG2−01−L8 　LTR2−01−L8 　LTR2−31−L8 ★：Made to order products. LTR（Conductive Rubber Contact） SPST Without LED（Non-illuminated） □6 2.5 STROKE（1） 6.5±0.3 0.4 Switching function 3.5±0.3 0.5 0.65 5.08±0.5 6.2 （4） 7 6±0.2 Circuit diagrams Part No. （2） LTR1-01 OFF Connecting terminals ̶ （ON） （1） t=0.3 （3） FUJI　 SOKU LTR1 Terminal numbers are not shown on the switch. SPST With LED □6 0.7 2.5 STROKE（1） 6.5±0.3 0.4 7±3 3.5±0.3 （6） 7 6±0.2 5.08±0.5 6.2 （4） t=0.3 （3） 0.5 Part No. 0.65 0.5 FUJI　 SOKU LTR2 （2） （1） （5） Terminal numbers are not shown on the switch. Switching function LTR2−01−L■ LTR2−31−L■ OFF Connecting terminals ̶ Circuit diagrams （ON） LED circuit LTM（Metal Contact） SPST Without LED（Non-illuminated） □6 2.5 STROKE（0.25） 6.5±0.3 0.4 Switching function 3.5±0.3 0.5 0.65 （2） （3） （1） 5.08±0.5 6.2 （4） LTM1−01 LTMG1−01 OFF Connecting terminals ̶ （ON） t=0.3 7 6±0.2 Circuit diagrams Part No. FUJISOKU LTM1 Terminal numbers are not shown on the switch. LTM2 SPST With LED □6 0.7 2.5 STROKE（0.25） 6.5±0.3 0.4 Part No. 7±3 3.5±0.3 FUJISOKU 5.08±0.5 6.2 7 6±0.2 t=0.3 （3） （6） （2） （1） （5） Terminal numbers are not shown on the switch. （ON） ：Momentary Circuit diagrams 0.65 0.5 （4） 0.5 Switching function LED color to be specified in ■. LTM2−01−L■ LTMG2−01−L■ LTM2−31−L■ OFF Connecting terminals ̶ （ON） LED circuit ■ ：Refer to "Table of Part Numbers" on P.171. LTR・LTM ■Flux Cleaning ■Soldering Series Manual soldering Auto soldering LTM LTR 380℃ Max. 3sec. Max. 275℃ Max. 6sec. Max. 380℃ Max. 3sec. Max. 265℃ Max. 6sec. Max. ・ Preheating in the flow line should be 80~120℃ , 120 sec. max. ● Do not dip solder the switches with color buttons or ⑴Solvents : Fluorine or Alcohl type ⑵LTM and LTR series are not washable. To wash the PC board, clean the soldering surface of the PC board with a brush so that the switch is not exposed to the cleaning solution. ⑶After soldering, wait until the temperature of the terminals cool down to 90℃ or below or until the parts are exposed to room temperature for more than 5 min. before washing. mounting frames attached. Soldering heat may deform the accessories or cause ingress of flux. ■Ambient Conditions ■Dimensions of Assembled Switch Ｂ Ａ ⑴In case of switches with silver-plated contacts, do not use in an environment where there is corrosive gas such as sulfuric or ammonia gas which may affect the silver plating. ⑵LTM and LTR series are open-structure switches and should not be used in a dusty environment. 1.5 size A size B □10 □12.5 10mm sq. 12.5mm sq. φ10 φ12.5 10mm dia. 12.5mm dia. □7.5 □10 7.5mm sq. 10mm sq. φ7.5 φ10 7.5mm dia. 10mm dia. 2 7.5 3.5 （12.5） Button □10 10mm sq. φ10 10mm dia. □7.5 7.5mm sq. φ7.5 7.5mm dia. ■Precautions LED circuit Accessories mounting Current to be applied to the LED must be lower than the forward current (IF) indicated in the LED Specifications of each switches. Resistance value R should be calculated using the formula on the right. Installing the Mounting Frame 1.Installing Install the mounting frame so that the tab on the frame is in the same direction as the slot on the switch. Example : E=5V, R= E－VF IF R= 5－2.0 0.01 IF=10mA =300Ω Use VF=2.0V to calculate. 2. Installing the Button Install the button so that the protrusions on the switch fit into the square holes on the button. The mounting frame cannot be installed with the switch button installed. LTR・LTM ■Optional Accessories 《Sold separately》 Color Button Part Name □10 Normal luminance High luminance Illuminated type Non-illuminated type Dimensions Dark gray 140007480168 140007480178 140007480188 140007480198 Gray 140007480169 140007480179 140007480189 140007480199 Light gray 140007480170 140007480180 140007480190 140007480200 Ivory 140007480171 140007480181 140007480191 140007480201 Red 140007480172 140007480182 140007480192 140007480202 Green 140007480174 140007480184 140007480194 140007480204 Blue 140007480173 140007480183 140007480193 140007480203 Clear 140007480422 140007480451 140007480505 140007480506 Red clear 140007480205 140007480208 140007480211 140007480214 Green clear 140007480206 140007480209 140007480212 140007480215 Yellow clear 140007480207 140007480210 140007480213 140007480216 Clear 140007480554 − 140007480562 − Red clear 140007480551 − 140007480559 − Green clear 140007480552 − 140007480560 − Yellow clear 140007480553 − 140007480561 − 取付枠/Mounting Frame Part Name Dimensions □10 □12.5 Dark gray 140000340170 140000340171 140000340168 140000340169 Gray 140000340179 140000340182 140000340173 140000340176 Light gray 140000340180 140000340183 140000340174 140000340177 Ivory 140000340181 140000340184 140000340175 140000340178 Mounting frame is common to both illuminated and non-illuminated switches. Color Button Part Name Illuminated type Dimensions LED luminance ②Screen color ①Color Normal luminance Normal luminance Clear Clear Dark gray 140007480452 140007480459 Gray 140007480453 140007480460 Light gray 140007480454 140007480461 ：Optional Accessories