Siemens 3RT1064-6AP36 Contactor

3RT1064-6AP36

1. 3RT: SIRIO Electromagnetic Contactor Serie
2. 1: Classic imported SIRIUS 3RT1 Series (Domestic equivalent: 3RT5/3RT6)
3. 0: 3-pole contactor for motor loads (3NESSUN contatto principale)
4. 64: Frame Size S10, AC-3 rated current 225 UN
5. 6: Conventional electromagnetic operating mechanism (non-electronic coil)
6. UN: Coil voltage code → AC/DC 220～240 V (Bobina AC/DC universale)
7. P: Main circuit busbar connection
8. 36: Permanently built-in auxiliary contacts 2NO + 2NC

Descrizione completa: 3-pole power contactor, Frame S10, terminali di sbarre, 220~240 V AC/DC coil, fisso 2 Normalmente aperto + 2 Contatti ausiliari normalmente chiusi.

2. Main Electrical Specifications

Cable Connection Capacity

Circuito principale: Stranded cable 70～240 mm²

Circuito ausiliario: 0.5～4 mm²

3. Contorno & Installation Information

Metodo di montaggio: Base plate screw mounting (DIN rail mounting NOT supported; large S10 frame can only be fixed to cabinet base plate)

Front protection class: IP00

Ambient operating temperature: -25℃ ~ +60 ℃ (full-load operation at 60℃)

4. Scenari applicativi tipici

Direct-on-line starting of 3-phase induction motors, main contactor for star-delta starters, VFD bypass

Compressori d'aria, pompe dell'acqua, tifosi, macchine per lo stampaggio ad iniezione, high-power production line drives

HVAC, centrale elettrica, metallurgia, port crane power circuits

⚠️ Not recommended for long-term inching operation under AC-4 duty; select higher frame size for frequent start-stop applications.

5. Alternative Selection Reference

1) Direct OEM replacement (Siemens original)

3RT1064-6AP36 (Modello soggetto, 220~240 V AC/DC coil)

Coil voltage variants:

3RT1064-6AP36 = 220~240 V AC/DC

3RT1064-6BP36 = 110~127 V AC/DC

2) Upgraded alternative

3RT1065-6AP36: Frame S10, AC-3 265 UN (Higher capacity, identical mounting dimensions)

⚠️ Important distinction: 3RT12xx series are vacuum contactors with different construction; not directly interchangeable.

Domestic economical model: 3RT5064 (AC-only coil, different terminal structure; cannot directly replace imported busbar-type 3RT1064).

6. Selection Pitfall Reminders
7. Main circuit adopts busbar connection, not cable terminals; terminal adapter accessories are required if cable wiring is needed.
8. S10 frame without DIN rail base, only base plate mounting available.
9. Bobina AC/DC universale; compatible with both AC230 V control and DC220 V control circuits.
10. Auxiliary contacts 2NO+2NC are permanently built-in, cannot be removed or reconfigured freely.
11. Standard ordering designation with hyphen: 3RT1064-6AP36, do not omit the hyphen.
12. Optional Compatible Accessories

3RU thermal overload relays (S10 frame rating)

Soppressori di sovratensione (RC network, varistor for coil protection)

Mechanical interlock kits (for forward/reversing contactor pairs)

Main circuit terminal adapters (cable-to-busbar transition)

Mounting Dimensions – Siemens 3RT1064-6AP36 (Frame S10)

Important Precondition: DIN rail mounting is not supported; only base plate bolt mounting

1. Overall Outer Dimensions (L × A × P, mm)

Width W: 145 mm

Height H: 210 mm

Depth D: 202 mm (cabinet internal depth occupation)

2. Base Plate Mounting Hole Dimensions (Critical for cabinet sheet metal processing)

4 fixing through holes, bolt specification: M8

1. Interasse orizzontale (left-right): 124 mm
2. Interasse verticale (up-down): 186 mm
3. Diametro del foro di montaggio: Φ9 mm (for M8 bolts)

Bounding outline of mounting hole centers: 124 mm (W) × 186 mm (H)

3. Wiring Clearance for Main Circuit Busbar

Main terminals exposed on top and bottom for busbar installation:

Phase spacing: 50 mm

Terminal bolt: M12

Recommended maximum busbar thickness ≤12 mm

4. Minimum Cabinet Installation Clearance (Siemens official heat dissipation specification)

Top clearance above contactor: ≥10 mm

Bottom clearance below contactor: ≥10 mm

Left & right side clearance: ≥10 mm

Front clearance (towards arc shield): ≥20 mm

Insufficient clearance causes temperature rise and derated operation.

5. Peso

Net weight of unit: ca. 7.8 kg

6. Supplementary Installation Notes
7. 3RT1064-6AP36 = busbar connection version. Cable-terminated models of the same frame share identical overall dimensions, only terminal structure differs.
8. 3RT1065 (265 UN) of the same series uses S10 frame; mounting dimensions are fully interchangeable, base plate hole layout can be reused.
9. Minimum center-to-center distance between two side-by-side contactors with mechanical interlock for forward/reversing circuit: 150 mm.
10. For continuous full-load operation above 40℃ ambient temperature, expand surrounding heat dissipation clearance to minimum 15 mm.

Service Life Parameters – Siemens 3RT1064-6AP36 (Frame S10)

1. Vita utile meccanica (Typical value from official datasheet)

Resistenza meccanica: 10,000,000 cicli operativi (10 milioni di volte)

Definizione: No-load open/close cycles without main circuit load. Built-in standard mechanical auxiliary contacts (2NO+2NC) do not reduce mechanical life.

⚠️ Distinction:

If electronic auxiliary modules are fitted → mechanical endurance reduced to 5,000,000 cicli.

Standard built-in 2NO+2NC mechanical auxiliary contacts of this model are not subject to this limitation.

2. Vita utile elettrica (Contatti principali, key reference for selection)

Duty condition: AC-3, 400 V, normal motor start-stop (breaking 6×Ie starting current)

Electrical endurance ≈ 200,000 cicli (200,000 volte)

AC-4 inching duty (rotore bloccato, frequent reversing): Electrical life drops significantly, typically limited to tens of thousands of cycles. Select higher-rated contactor or dedicated AC-4 contactor for frequent jogging applications.

3. Key Supplementary Notes
4. Mechanical life ≠ Electrical life

Mechanical endurance reflects durability of magnetic core, springs and transmission mechanism; electrical endurance is limited by contact arc erosion. In most operating conditions, electrical service life expires first.

2. Environmental Influences

Alta temperatura, polvere, umidità, coil voltage deviation and vibration will shorten both mechanical and electrical service life.

3. Maximum Permissible Operating Frequency

Standard duty: ≤1200 cycles/hour. Exceeding this frequency requires current derating, resulting in aggravated temperature rise and accelerated service life reduction.

4. Interchangeability within Frame

All S10 frame contactors including 3RT1064 / 3RT1065 share uniform mechanical endurance of 10 milioni di cicli, applicable for reference.