APT-LA39-E11F-Y pushbutton switch

Model Code Breakdown

2. Paramètres techniques de base

3. Caractéristiques du produit & Applications

Caractéristiques du produit

1. Conception compacte: Petite taille, ideal for compact and intensive panel control
2. Installation facile: Modular snap-in connection for convenient installation and maintenance
3. Reliable Contact: Self-cleaning contacts with positive break design for stable connection
4. Operation Type: Momentary (self-resetting) pushbutton, automatically returns when released
5. Appearance: Square head with bright yellow color for easy identification

Applications typiques

Industrial automation control panels

Machine tool operation interfaces

Textile machinery control

Marine electrical systems

Power equipment signal indication

Medical equipment control

4. Modèles alternatifs & Informations de commande

Alternative Models in the Same Series

Official Ordering Info

Standard Order No.: 101802139 (corresponds to LA39-E11F/Y)

Conditionnement: Individually packaged; discounts available for bulk orders

Lead Time: Regular stock item, typically shipped within 5 jours

5. Notes de sélection
6. Mounting Compatibility: Ensure panel cutout is Φ16mm, compatible with other 16mm series pushbuttons
7. Correspondance électrique: Load current ≤5A, voltage ≤250V
8. Mode de fonctionnement: Momentary type; select LA39-E11TF/Y for latching function
9. Environnement: Suitable for general industrial environments; higher IP rating recommended for harsh conditions
10. Color Usage: Yellow typically for warning or special function indication, adjustable by application
11. Brand Background

APT (formerly Shanghai Second Electric Works) was founded in 1993 and fully acquired by Siemens in 2008. It is now a professional low-voltage electrical brand under Siemens, focusing on R&D and manufacturing of pushbuttons, voyants lumineux, relais, etc.. As a core product line, the LA39 series is widely used in global industrial control for its high reliability, long life and complete specifications.

APT-LA39-E11F-Y is a Φ16mm miniature square yellow momentary pushbutton from Siemens APT (formerly Shanghai Second Electric Works) LA39‑E series, avec 1 NON + 1 Contacts NF.

Yellow is commonly used for warning, debugging, standby, jogging, reset, and intervention functions rather than main start/stop operations.

1. Automatisation industrielle & Control Cabinets

Fault reset and alarm acknowledgment on electrical cabinets and PLC control panels

Manual jogging, commissioning, and maintenance mode switching

Standby start, bypass control, and safety intervention

2. Machine Tools & CNC Equipment

Auxiliary action jogging for lathes, fraiseuses, machining centers

Temporary manual control of tool changers, lubrication and cooling systems

Machine tool alarm reset and safety bypass

3. Light Industry Machinery & Assembly Lines

Commissioning and fine-tuning for packaging, remplissage, printing, textile machinery

Temporary jogging of conveyors and sorting equipment

Quick reset of abnormal equipment status

4. CVC, Refrigeration, Ventilateurs & Pumps

Maintenance and commissioning for air conditioning and chiller units

Manual test and reset for fan and pump control cabinets

Auxiliary control for fire exhaust and fresh air systems

5. Power Distribution & Ring Main Units

Signal reset in low-voltage switchgears, ring main units and terminal boxes

On-site manual testing of circuit breakers and contactors

Operation buttons for inspection and commissioning in power distribution rooms

6. Engineering Machinery, Ships & Vehicles

Auxiliary control in engineering machinery cabs and on-board electrical cabinets

Miniature operation buttons on ship bridges and engine control consoles

Function control for special vehicles and sanitation trucks

7. Medical, Laboratory & Instrument Equipment

Mise en service, calibration and reset for medical devices and testing instruments

Jog control for small laboratory equipment and test benches

Instruments requiring compact installation with limited panel space

8. Ascenseurs, Lifting & Logistics Equipment

Inspection jog buttons in elevator car top/pit inspection boxes

Auxiliary control for lifting platforms, freight elevators and parking systems

Temporary manual operation for sorting and lifting equipment

Suitable for all industrial control scenarios requiring Φ16mm miniature mounting space and yellow pushbuttons for warning, debugging, reset or jogging functions.

Complete List of Siemens APT Product Series (2026 Latest)

Siemens APT (formerly Shanghai Second Electric Works) is a professional brand specializing in low-voltage electrical and industrial control components. Its product portfolio covers 8 core categories: pushbuttons/indicator lights, cam switches, relais, disjoncteurs, warning beacons, current transformers, limit switches, and control boxes, providing a full industrial control solution from miniature components to large protection devices.

1. Pushbutton Switch Series (Gamme de produits de base)
2. LA39 Series (Classic General Purpose, Φ12/16/22/30mm)

LA39-E: Φ16mm miniature pushbuttons (par ex., LA39-E11F-Y, yellow square momentary type)

LA39-A/B/C: Φ22mm standard pushbuttons with flat, mushroom, key-operated heads

LA39-T: Illuminated pushbuttons with LED

LA39-EM: Metal pushbuttons for harsh environments

Principales fonctionnalités: Modular snap-in, self-cleaning contacts, positive break, mechanical life >1,000,000 cycles

2. PB3 Series (Quick Mount, Φ22mm)

Tool-free quick installation

Multiple operator head combinations for modern control panels

Suitable for mass production and fast maintenance

3. LA42 Series (Compact, Φ16mm)

Ultra-slim profile, space-saving

Momentary/latching optional, 1NO/1NC standard

For small equipment and instruments

4. LA58 Series (Heavy Duty, Φ30mm)

High mechanical strength, shock-resistant

For metallurgy, mining and harsh environments

Supports high-current loads up to 10A

5. Special Function Pushbuttons

2. Indicator Light Series
3. AD16 Series (Classic General Purpose, Φ16/22/30mm)

AD16-16: Φ16mm miniature LED indicators, faible puissance

AD16-22: Φ22mm standard indicators, high brightness, long life

AD16-30: Φ30mm large indicators for long-distance visibility

Couleurs: Rouge, Jaune, Vert, Bleu, Blanc, Orange

2. AD11 Series (Flush Mount)

Flush with panel surface

For clean rooms, food processing and hygienic environments

IP65 waterproof, dustproof and moisture-proof

3. AD09 Series (Micro Indicator, Φ9mm)

Ultra-small for high-density panels

Low current draw for battery-powered devices

Widely used in instruments and medical equipment

3. Cam Switch Series
4. LW39 Series (Universal Cam Switches)

LW39-16A: 16A thermal current, switching angles 30°/45°/90°

LW39-25A: Medium current for motor control

LW39-40A: High current for power distribution

LW39-N: For relay protection industry, haute fiabilité

Applications: Control circuit switching, distribution d'énergie, motor forward/reverse

2. LW26 Series (Cam Switches)

Multi-position, complex logic control

Modulaire, customizable contact combinations

For automated production lines and machine tools

3. LW8 Series (Miniature Cam Switches)

Taille compacte, space-saving

2–4 positions, 1–2 contact sets

For instruments and small equipment

4. Relay Series
5. SR Series (General Purpose Electromagnetic Relays)

Standard 8-pin/11-pin base, internationally compatible

Contact rating: AC250V/5A, DC24V/3A

Coil voltages: AC24V/110V/220V, DC12V/24V

For control circuit switching and signal amplification

2. NR Series (Power Relays)

High contact rating: AC250V/10A, DC24V/5A

Excellent vibration resistance for automotive and high-speed lines

Low coil power consumption

3. ER Series (Safety Relays)

Compliant with EN60947-5-1, for safety circuits

Positive-guided contacts for guaranteed break

For elevators, hoisting and safety-critical systems

4. HR Series (Time Relays)

Modes: on-delay, off-delay, interval delay

Timing range: 0.1s~100h, accuracy ±5%

Digital display or knob adjustment available

5. Circuit Breaker Series
6. ATH Series (Miniature Circuit Breakers, 6A~63A)

Compliant with IEC60898, 6kA pouvoir de coupure en court-circuit

Déclenchement thermomagnétique, overload and short-circuit protection

For final distribution and control cabinet power protection

2. ATZ Series (Disjoncteurs à boîtier moulé, 16A~800A)

Modular design with expandable accessories

Optional earth leakage protection for personnel safety

For workshop distribution and large equipment protection

3. ATQ Series (Isolating Switches, 100A~2500A)

High rated current, switchable under load

Visible break point for safe maintenance

Main switches for low-voltage distribution systems

6. Other Core Product Series
7. Warning Beacon Series

TL Series: Multi-layer signal beacons with audible-visual alarm

TL-50ED Series: LED source, faible puissance, long life

Applications: Equipment status, alarme de panne, safety alerts

2. Current Transformer Series

ALH Series: 0.66kV low-voltage transformers, accuracy 0.2~0.5 class

ALH-K Series: Split-core type, installable without busbar disassembly

ALH-B Series: High-ratio transformers for high-current systems up to 6300A

Applications: Energy metering, protection, power monitoring

3. Limit Switch Series

ALS1 Series: Standard limit switches, IP67 protection

ALS3 Series: Slow-make type for precise positioning

ALS5 Series: Heavy-duty, high shock resistance

Applications: Machine travel control, automation positioning, elevator leveling

4. Control Box Series

XKA Series: Plastic control boxes, ABS housing, shock-resistant, corrosion-resistant

XKB Series: Metal control boxes, acier inoxydable, for outdoor and harsh environments

Customization: Custom cutouts and internal layout available

3. Certifications de produits

Full series certified by CCC, CE, RoHS

Some products with UL, CSA certifications for North American market

8. Supplementary Info for LA39-E11F-Y

Full Definition: APT LA39-E series (Φ16mm), 1NON+1NC, square flat head, yellow momentary pushbutton

Standard Order No.: 101802139

Matching Indicator: AD16-16 series Φ16mm yellow indicator for integrated operation and indication

Recommended Partner: SR series relays (par ex., SR-05DC110V) for signal amplification and control expansion

Siemens APT product series cover full industrial control scenarios, from miniature pushbuttons to large protection devices, for standard and harsh environments. The LA39 series, as APT’s classic line, is a top choice in industrial automation for its reliability and versatility.