×
Siemens Industry Online Support
Siemens AG
SiePortal

3LD2103-1TL51

(EAN: 4011209402928 / UPC: 754554732701)

3LD switch disconnector, main switch

  • Product details
  • Technical data
  • CAx data

Technical data

SENTRON, Switch disconnector 3LD, main switch, 4-pole, Iu: 25 A, Operating power / at AC-23 A at 400 V: 9.5 kW, front-mounted, rotary operating mechanism, black, 4-hole mounting of the handle
Model
product brand name SENTRON
product designation Switch disconnector
design of the product Main switch
display version for switch position indicator manual operation 1 ON - 0 OFF
type of switch front mounted
design of the actuating element Short rotary knob
color of the actuating element black
design of handle rotary operating mechanism, black
type of the driving mechanism motor drive No
General technical data
number of poles 4
size of switch disconnector 2
mechanical service life (operating cycles) typical 100 000
electrical endurance (operating cycles)
● at AC-23 A at 690 V 6 000
operating frequency maximum 50 1/h
degree of pollution 3
Voltage
insulation voltage rated value 690 V
surge voltage resistance rated value 6 kV
operating voltage
● at AC rated value 690 V
operating frequency rated value
● minimum 50 Hz
● maximum 60 Hz
Protection class
protection class IP IP65
degree of protection NEMA rating 1, 3R, 4X, 12
protection class IP on the front IP65
Dissipation
power loss [W] for rated value of the current at AC in hot operating state per pole 1.1 W
Main circuit
operational current
● at AC-21 at 690 V rated value 25 A
● at AC-21 A at 240 V rated value 25 A
● at AC-21 A at 400 V rated value 25 A
● at AC-21 A at 440 V rated value 25 A
● at AC-23 A at 400 V rated value 20 A
operating power
● at AC-23 A at 240 V rated value 5 kW
● at AC-23 A at 400 V rated value 10 kW
● at AC-23 A at 440 V rated value 9.5 kW
● at AC-23 A at 690 V rated value 10 kW
● at AC-3 at 240 V rated value 4 kW
● at AC-3 at 400 V rated value 8 kW
● at AC-3 at 690 V rated value 7.5 kW
Auxiliary circuit
number of CO contacts for auxiliary contacts 0
number of NC contacts for auxiliary contacts 0
number of NO contacts for auxiliary contacts 0
operating voltage of auxiliary contacts at AC maximum 500 V
continuous current of the auxiliary contact rated value 10 A
insulation voltage of the auxiliary switch rated value 500 V
Suitability
suitability for use main switch Yes
suitability for use switch disconnector Yes
suitability for use EMERGENCY OFF switch No
suitability for use safety switch Yes
suitability for use maintenance/repair switch Yes
Product details
product feature can be locked into OFF position Yes
accessories
product extension optional
● motor drive No
● voltage trigger No
number of connectable NC contacts for auxiliary contacts attachable maximum 2
number of connectable NO contacts for auxiliary contacts attachable maximum 2
number of connectable CO contacts for auxiliary contacts attachable maximum 0
number of bracket locks maximum 3
hasp thickness of the bracket locks 4 ... 8 mm
Short circuit
conditional short-circuit current with line-side fuse protection
● at 690 V by gG fuse rated value 50 kA
let-through current with closed switch
● at 240 V for combination switch + gG fuse maximum 3.5 kA
● at 440 V for combination switch + gG fuse maximum 3.5 kA
● at 690 V for combination switch + gG fuse maximum permissible 4 kA
I2t value with closed switch
● at 240 V for combination switch + gG fuse maximum 4 kA2.s
● at 440 V for combination switch + gG fuse maximum 4 kA2.s
● at 690 V for combination switch + gG fuse maximum 4 kA2.s
design of the fuse link
● for short-circuit protection of the main circuit required fuse gL/gG: 25 A
● for short-circuit protection of the auxiliary switch required fuse gL/gG: 10 A
operational current of upstream fuse rated value 25 A
according UL
operational current at AC according to UL 508/UL 60947-4-1 rated value 25 A
operating voltage at AC at 50/60 Hz according to UL 508/UL 60947-4-1 rated value 600 V
active power [hp] at AC at 480 V according to UL 508/UL 60947-4-1 rated value 10
active power [hp] at AC at 600 V according to UL 508/UL 60947-4-1 rated value 15
short-time withstand current (SCCR) at 600 V according to UL 508/UL 60947-4-1 5 kA
continuous current of upstream fuse according to UL rated value 50 A
type of fuse according to UL RK5
Connections
AWG number as coded connectable conductor cross section solid maximum
●   8
●   14
type of connectable conductor cross-sections for copper conductor
● solid 1x (1,5...16mm²)
● finely stranded with core end processing 1x (1,5...10mm²)
● stranded 1x (1,5...16mm²)
type of connectable conductor cross-sections for auxiliary contacts
● solid lateral auxiliary switch 2x (0,75 ... 2,5mm²), 1x 4mm²; front auxiliary switch 1x (0,75 ... 2,5mm²)
● finely stranded with core end processing lateral auxiliary switch 2x (0,75 ... 1,5mm²), 1x 2,5mm²; front auxiliary switch 1x 2,5mm²
● stranded lateral auxiliary switch 2x (0,75 ... 2,5mm²), 1x 4mm²; front auxiliary switch 1x (0,75 ... 2,5mm²)
type of electrical connection
● for main current circuit box terminal
● for auxiliary contacts connection terminals
Mechanical Design
height 84 mm
width 67 mm
depth 92.5 mm
type of device fixed mounting
fastening method Built-in unit fixed-mounted version
fastening method
● 4-hole front mounting Yes
● front mounting with central attachment No
● rail mounting No
net weight 236 g
Environmental conditions
ambient temperature during operation
● minimum -25 °C
● maximum 55 °C
ambient temperature during storage
● minimum -25 °C
● maximum 55 °C
Approvals Certificates
General Product Approval
General Product Approval Test Certificates Marine / Shipping other Environment
Environment
Further information
Information on the packaging
Information- and Downloadcenter (Catalogs, Brochures,…)
Industry Mall (Online ordering system)
Service&Support (Manuals, Certificates, Characteristics, FAQs,...)
Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, ...)
CAx-Online-Generator
Tender specifications
3LD2103-1TL51
3LD2103-1TL51
3LD2103-1TL51
3LD2103-1TL51
3LD2103-1TL51
last modified: 6/20/2023
Date
3/1/2025
Subject to change without notice
© Copyright Siemens 2025
Technical data for the product is also available in the following languages:
  • German
  • French
  • Italian
  • Spanish
  • Chinese (simplified)
  • Dutch
  • Russian
  • Czech
  • Portuguese
  • Turkish
  • Japanese
  • Polish