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Illuminated pushbutton switch LTR/LTM

●To make a purchase, contact Distributors, or use e-commerce below.
SALES CHANNEL  ;Check our Distributors.
SALES CHANNELClick here to check our Distributors.
To the Illuminated pushbutton switch “LTR/LTM series” page on the DigiKey online shop
To the Illuminated pushbutton switch “LTR/LTM series” page on the Mouser online shop

Ultra-Miniature Illuminated Pushbutton Switches

 
FeaturesFeatures
  • 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).

  • Two Types of Contacts LTR series: Conductive rubber contact for soft tactile feel. LTM/LTMG series: Metal contact for sharp tactile feel.

  • 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.

  • 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.

Specifications

Rating 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.
Initial Contact Resistance

LTR: 500Ω max.(1mA 2VDC at 1.47N{ 150gf})

LTM:100mΩ max (1.5mA 200μ VAC at 1.96N{ 200gf})
Dielectric Strength 250VAC 1 minute
Insulation Resistance 100MΩ min( 100VDC)
Electrical Life LTR:100,000 operations
LTM:300,000 operations
Contact Bounce

LTR:3 msec. max. ( Initial value)
LTM:10 msec. max. ( Initial value)

Operating Force (at peak force)

LTR:0.98±0.39N
LTM:1.37±0.39N

Travel

LTR:1 mm
LTM:0.25 mm

Operating Temperature Range -25~+70℃
Storage Temperature Range -40~+70℃

Part Number Designation

LTMG2-01-L2

Series

Type of Contact

M: Metal contact

R: Conductive rubber contact

Contact Plating

Blank: Silver plated

G: Gold plated

Structure

1: Non-illuminated

2: Illuminated

LED luminance

01: Normal

31: High

LED Color

(Plaease refer below)

LED specification
  • LTM2-##-## / LTMG2-##-## / LTR2-##-## 
Part No. (##-##)LED colorLuminanceForward current
(IF)
Forward V
(VF)/nom.
Forward V
(VF)/ max.
Reverse voltage
(VR)
01-L2 Red Normal 30 mA 2.0 VDC 2.5 VDC 5 VDC
01-L5 Green Normal 25 mA 2.2 VDC 2.5 VDC 5 VDC
01-L8 Yellow Normal 30 mA 2.1 VDC 2.5 VDC 5 VDC
31-L2 Red High 30 mA 1.95 VDC 2.5 VDC 5 VDC
31-L5 Green High 30 mA 3.2 VDC 4.0 VDC 5 VDC
31-L8 Yellow High 30 mA 2.0 VDC 2.5 VDC 5 VDC

List of Part Numbers

Part numberType of Contact LED Color Contact PlatingLED LuminanceCAD
LTM1-01 Metal contact Silver plated
LTM2-01-L2 Metal contact Red Silver plated Normal
LTM2-01-L5 Metal contact Green Silver plated Normal
LTM2-01-L8 Metal contact Yellow Silver plated Normal
LTM2-31-L2 Metal contact Red Silver plated High
LTM2-31-L5 Metal contact Green Silver plated High
LTM2-31-L8 Metal contact Yellow Silver plated High
LTMG1-01 Metal contact Gold plated
★LTMG2-01-L2 Metal contact Red Gold plated Normal
★LTMG2-01-L5 Metal contact Green Gold plated Normal
★LTMG2-01-L8 Metal contact Yellow Gold plated Normal
LTR1-01 Conductive rubber contact Gold plated
LTR2-01-L2 Conductive rubber contact Red Gold plated Normal
LTR2-01-L5 Conductive rubber contact Green Gold plated Normal
LTR2-01-L8 Conductive rubber contact Yellow Gold plated Normal
LTR2-31-L2 Conductive rubber contact Red Gold plated High
LTR2-31-L5 Conductive rubber contact Green Gold plated High
LTR2-31-L8 Conductive rubber contact Yellow Gold plated High
★: Made to oder products.
Optical Accessories
1. Color buttons
SizeIlluminated
type or Non
LuminanceColorPart No.Outline dimenions
□7.5 ㎜ Without LED Black 140007480168
Gray 140007480169
White 140007480170
Ivory 140007480171
Red 140007480172
Green 140007480174
Blue 140007480173
With LED Normal Clear 140007480422
Red clear 140007480205
Green clear 140007480206
Yellow clear 140007480207
High Clear 140007480554
Green clear 140007480552
Yellow clear 140007480553
Φ7.5 ㎜ Without LED Black 140007480178
Gray 140007480179
White 140007480180
Ivory 140007480181
With LED Normal Clear 140007480451
Red clear 140007480208
Green clear 140007480209
□10 ㎜ Without LED Black 140007480188
Gray 140007480189
White 140007480190
Ivory 140007480191
Red 140007480192
Green 140007480194
Blue 140007480193
With LED Normal Clear 140007480505
Red clear 140007480211
Green clear 140007480212
Yellow clear 140007480213
High Green clear 140007480560
Yellow clear 140007480561
Φ10 ㎜ Without LED Black 140007480198
Gray 140007480199
White 140007480200
Red 140007480202
Green 140007480204
Blue 140007480203
With LED Normal Clear 140007480506
Red clear 140007480214
Green clear 140007480215
2. Dot illuminated color buttons
SizeLuminanceLED colorButton colorPart No.Outline dimensions
□10 ㎜ Normal Clear Gray 140007480453
White 140007480454
Φ10 ㎜ Normal Clear Black 140007480459
Gray 140007480460
White 140007480461
3. Mounting frames
Applicable sizeColorPart No.Outline dimensions
 for □7.5 ㎜ Black 140000340170
Gray 140000340179
White 140000340180
Ivory 140000340181
 for Φ7.5 ㎜ Black 140000340171
Gray 140000340182
White 140000340183
for □10 ㎜ Black 140000340168
Gray 140000340173
White 140000340174
Ivory 140000340175
for Φ10 ㎜ Black 140000340169
Gray 140000340176
White 140000340177
Ivory 140000340178
The mounting frame can be used for both illuminated and non-illuminated types depending on the applicable size.

Precautions

◆Soldering
SeriesLTMLTR

Manual soldering

380 ℃ Max.
3 sec. Max.
380 ℃ Max.
3 sec. Max.
Auto soldering 275 ℃ Max.
6 sec. Max.
265 ℃ Max.
6 sec. Max.
  • Preheating in the fl ow line should be 80~120℃ , 120 sec. max. 
  • Do not dip solder the switches with color buttons or mounting frames attached. Soldering heat may deform the accessories or cause ingress of fl ux.
◆Flux Cleaning
  • Solvents : Fluorine or Alcohl type
  • LTM 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.
  • After 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.
◆Ambient Conditions
  • In 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 aff ect the silver plating.
  • LTM and LTR series are open-structure switches and should not be used in a dusty environment.

Outline Dimensions

(Unit:mm)

Packaging Specification

(Unit:mm)

Environmental Data

●The above contents and descriptions are subject to change without notice. 

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