Contactor,circuit breaker,solar inverter,electric meter,solar batteries
Product Type: 3-pole AC contactor, discontinued. Recommended replacement: 3RT6026-1AN20 (domestic 3RT6 series)
Core Parameters: 22A / 400V at AC-3 duty, suitable for 11kW motors; coil AC230V 50/60Hz; auxiliary contacts 2NO + 2NC
Positioning: Size 1, general-purpose industrial type, used for motor starting/stopping, equipment control and power distribution switching
- Full Model Interpretation (Including Complete Order Number)
Complete order number: 3TF4322-0XM0. Segment meanings are as follows:
| Model Segment | Meaning | Detailed Description |
| 3TF | Series Code | Siemens AC contactor series (distinguished from 3TH auxiliary contactors and older 3TB series) |
| 43 | Size / Current Rating | Size 1, rated current 22A at AC-3 400V, suitable for 3-phase motors up to 11kW |
| 22 | Auxiliary Contact Configuration | 2 Normally Open (NO) + 2 Normally Closed (NC), standard built-in auxiliary contacts, expandable |
| 0X | Coil Type | 0X = AC coil (1X = DC coil); 0XM indicates AC230V series |
| M0 | Coil Voltage | AC230V 50/60Hz. Full voltage codes: M=230V, F=115V, G=42V, Q=400V |
| Status | Product Lifecycle | Discontinued. Siemens official recommendation: upgrade to 3RT6 / 3RT5 series |
- Core Technical Specifications (Authoritative Data)
| Parameter Category | Specification | Remarks / Application |
| Main Circuit Parameters | ||
| Number of Poles | 3-pole | 3-phase AC circuit, no neutral pole |
| Rated Operational Voltage | AC 690V (insulation); AC 400V (typical) | Standard industrial voltage range |
| AC-3 Rated Current | 22A | At 400V, for 11kW 3-phase induction motors |
| AC-4 Rated Current | 11A | For severe duty such as direct starting and reversing of squirrel-cage motors |
| Breaking Capacity | AC-3 400V: 150kA; AC-3 660V: 35kA | Meets industrial short-circuit breaking requirements |
| Coil Parameters | ||
| Coil Voltage | AC230V 50/60Hz | Standard 0XM0 configuration, coil power approx. 12VA |
| Coil Type | AC electromagnetic coil | Stable pull-in, strong anti-interference |
| Mechanical / Electrical Life | ||
| Mechanical Life | ≥ 12,000,000 operations | No-load frequent operation, suitable for high-cycle applications |
| Electrical Life | ≥ 1,000,000 operations (AC-3) | Long-term reliable operation at 22A / 400V |
| Environment & Protection | ||
| Operating Temperature | -25°C ~ +55°C | Wide temperature range for outdoor, workshop and harsh environments |
| Ingress Protection | IP20 | Finger-safe, suitable for panel mounting |
| Mounting | TH35 standard rail | Quick installation, compatible with standard distribution boards |
| Approval Standards | ||
| Compliance | IEC 60947-4-1, GB 14048.4 | Globally recognized certifications, safe and reliable |
- Core Functions & Design Advantages
- Double-break Arc Extinction System: Main contacts feature double-break structure, strong arc quenching, reliable breaking, extended contact life
- Modular Accessory Compatibility: Supports add-on auxiliary contact blocks, shunt trips, undervoltage trips, mechanical interlocks, etc.
- Screw Terminals: Reliable screw connection for main circuit, suitable for high-current wiring; auxiliary terminals available in spring or screw type
- Wide-range Coil Design: Universal for 50/60Hz, adaptable to global grids, reduces spare part variety
- Mechanical Position Indication: Clear ON/OFF status for on-site inspection and safe operation
- Typical Applications
Motor Control: Starting, stopping, forward/reverse control of 3-phase induction motors (≤11kW), e.g. pumps, fans, machine tools
Industrial Machinery: Main circuit control for packaging, textile, injection molding, conveyors and other equipment
Power Distribution: Branch circuit switching in distribution boards and power boxes, local/remote control
Automated Lines: Integrated with PLCs and relays for automatic control in continuous production lines
- Replacement Solutions (Key)
5.1 Siemens Original Replacement (Recommended)
| Original Model | Replacement Model | Key Differences | Compatibility |
| 3TF4322-0XM0 | 3RT6026-1AN20 | Same size, AC-3 22A, AC230V coil, 2NO+2NC; accessories not interchangeable, full replacement required | Perfect drop-in replacement, identical mounting, improved performance |
| 3RT5026-1AN20 | Same current rating, longer mechanical life, heavy-duty rated | Domestic 3RT5 series, replaces legacy 3TF |
5.2 Cross-brand Alternatives
| Brand | Replacement Model | Matching Key Parameters | Application |
| ABB | AF16-30-01 | 3-pole, 22A AC-3, AC230V coil | General industrial, cost-effective |
| Schneider | LC1D25M7 | 3-pole, 25A AC-3, AC230V coil, 2NO+1NC | Slightly larger dimensions, verify mounting space |
| CHINT | CJX1-22/22 | 3-pole, 22A AC-3, AC230V coil, 2NO+2NC | Domestic alternative, significant cost advantage |
- Installation & Maintenance Guidelines
6.1 Installation Specifications
Mount vertically on TH35 rail, maintain ≥10mm clearance to adjacent devices for heat dissipation
For 22A rated current, main circuit recommended copper cable ≥ 4mm², tightening torque approx. 2.5N·m
Route coil wiring away from main high-voltage circuits to avoid EMI; auxiliary terminal cable ≥ 1.5mm²
6.2 Maintenance Recommendations
Regular inspection (every 6 months): contact erosion, terminal tightness, coil insulation
Contact maintenance: replace main contacts if worn below 1mm; clean or replace auxiliary contacts if poor connection
Cleaning: Use compressed air to remove dust, prevent insulation degradation
Troubleshooting: Coil fails to pull in → check voltage and wiring; contact burning → check load current and arc system
- Summary & Upgrade Suggestions
- Status: 3TF4322-0XM is discontinued by Siemens. 3RT6026-1AN20 is the preferred direct replacement with better performance and reliability.
- Selection Key: Strictly match number of poles, rated current, coil voltage and auxiliary contact configuration to ensure system compatibility.
- Upgrade Direction: For extended life or smart functions, select 3RT6 models with expanded auxiliary contacts and remote diagnostics for modern industrial control.
Siemens 3RT6 Series (Domestic SIRIUS) Contactor Model List
Key Overview: The 3RT6 series is Siemens’ official replacement for the legacy 3TF series. Classified by frame size (S00 / S0 / S000 / S1 / S2 / S3), it covers 7-110A AC-3 current, suitable for 3-phase motors up to 55kW, available in 3-pole / 4-pole, AC / DC coils, with extensive accessory support. Below is a list of commonly used full order numbers, sorted by frame size for general industrial use.
- Model Format & Core Parameter Explanation
1.1 Full Order Number Format
3RT6xxx-xxxxx (Example: 3RT6026-1AN20)
| Segment | Meaning | Common Codes |
| 3RT6 | Series Code | Domestic SIRIUS AC contactor, replaces 3TF series |
| 016 / 017 / 025 / 026 | Size / Current | 016=S00(9A); 017=S0(17A); 025=S000(25A); 026=S000(25A); 034=S1(38A) |
| 1 | Main Contact Configuration | 1=3NO (3-phase NO); 2=3NC (3-phase NC, rare) |
| A / B / F / M / G / Q | Coil Voltage | A=AC24V; B=DC24V; F=AC115V; M=AC230V; G=AC42V; Q=AC400V |
| 20 / 21 / 22 / 40 | Auxiliary Contacts | 20=1NO+1NC; 21=1NO; 22=1NC; 40=2NO+2NC (larger frames) |
1.2 Core Parameter Quick Reference
| Frame Size | AC-3 Current (400V) | Motor Rating | Built-in Aux. Contacts | Application |
| S00 | 7–9A | ≤4kW | 1NO / 1NC | Small fans, pumps, solenoid valves |
| S0 | 12–17A | ≤5.5–7.5kW | 1NO+1NC | Small-to-medium machine tools, conveyors |
| S000 | 22–25A | ≤11kW | 2NO+2NC | 11kW motors, general industrial circuits (replaces 3TF43) |
| S1 | 32–38A | ≤18.5kW | None (add-on required) | Medium motors, air compressors, pumps |
| S2 | 50–63A | ≤30kW | None (add-on required) | Heavy equipment, main power distribution |
| S3 | 80–110A | ≤55kW | None (add-on required) | Large motors, new energy applications |
- 3RT6 Series Popular Models (3-pole, 3NO Main Contacts)
2.1 Frame S00 (7-9A, ≤4kW)
| Full Order No. | Coil Voltage | AC-3 Current | Aux. Contacts | Application | 3TF Replacement |
| 3RT6016-1AN21 | AC230V | 9A | 1NO | Small loads, solenoids | 3TF3000-0XM0 |
| 3RT6016-1AN22 | AC230V | 9A | 1NC | Small loads, solenoids | 3TF3001-0XM0 |
| 3RT6016-1BB41 | DC24V | 9A | 1NO | PLC control, low-voltage DC systems | 3TF3000-0BB4 |
| 3RT6016-1BF40 | DC110V | 9A | 1NO/1NC | Industrial DC control | 3TF3001-0BF4 |
| 3RT6016-1QF00 | AC400V | 9A | 1NO | High-voltage control circuits | 3TF3000-0QF0 |
2.2 Frame S0 (12-17A, ≤5.5-7.5kW)
| Full Order No. | Coil Voltage | AC-3 Current | Aux. Contacts | Application | 3TF Replacement |
| 3RT6017-1AN20 | AC230V | 17A | 1NO+1NC | Small-to-medium motors, fans | 3TF3300-0XM0 |
| 3RT6017-1AN21 | AC230V | 17A | 1NO | Small-to-medium motors, fans | 3TF3301-0XM0 |
| 3RT6017-1BB40 | DC24V | 17A | 1NO+1NC | PLC control, DC systems | 3TF3300-0BB4 |
| 3RT6017-1AF00 | AC115V | 17A | 1NO+1NC | Industrial control, machine tools | 3TF3300-0AF0 |
2.3 Frame S000 (22-25A, ≤11kW, Key Replacement for 3TF43)
| Full Order No. | Coil Voltage | AC-3 Current | Aux. Contacts | Application | Key Replacement Note |
| 3RT6026-1AN20 | AC230V | 25A | 2NO+2NC | 11kW motors, general industrial circuits | Direct replacement for 3TF4322-0XM0, same size, upgraded performance |
| 3RT6026-1AN21 | AC230V | 25A | 1NO | 11kW motors, general industrial circuits | Replaces 3TF4301-0XM0 |
| 3RT6026-1BB40 | DC24V | 25A | 2NO+2NC | 11kW motors, DC control systems | Replaces 3TF4322-0BB4 |
| 3RT6026-1QF00 | AC400V | 25A | 2NO+2NC | High-voltage industrial circuits | Replaces 3TF4322-0QF0 |
| 3RT6025-1AC20 | AC24V | 25A | 2NO+2NC | Low-voltage control, small equipment | 3TF4322-0AC2 |
2.4 Frame S1 (32-38A, ≤18.5kW)
| Full Order No. | Coil Voltage | AC-3 Current | Aux. Contacts | Application |
| 3RT6034-1AN20 | AC230V | 38A | 2NO+2NC | 18.5kW motors, air compressors |
| 3RT6034-1BB40 | DC24V | 38A | 2NO+2NC | 18.5kW motors, DC systems |
| 3RT6034-1AF00 | AC115V | 38A | 2NO+2NC | Industrial control, heavy equipment |
2.5 Frame S2 (50-63A, ≤30kW)
| Full Order No. | Coil Voltage | AC-3 Current | Aux. Contacts | Application |
| 3RT6045-1AN20 | AC230V | 63A | 2NO+2NC | 30kW motors, pumps, main power distribution |
| 3RT6045-1BB40 | DC24V | 63A | 2NO+2NC | 30kW motors, DC control systems |
| 3RT6046-1AN20 | AC230V | 80A | 2NO+2NC | 45kW motors, heavy equipment |
2.6 Frame S3 (80-110A, ≤55kW)
| Full Order No. | Coil Voltage | AC-3 Current | Aux. Contacts | Application |
| 3RT6054-1AN20 | AC230V | 110A | 2NO+2NC | 55kW motors, new energy, large industrial equipment |
| 3RT6055-1BB40 | DC24V | 110A | 2NO+2NC | 55kW motors, high-voltage DC systems |
- Popular 4-pole Models (3P+N, with Neutral Protection)
| Full Order No. | Poles | Coil Voltage | AC-3 Current | Aux. Contacts | Application |
| 3RT6026-1AN23 | 3P+N (4P) | AC230V | 25A | 2NO+2NC | 11kW motors, loads with neutral |
| 3RT6034-1AN23 | 3P+N (4P) | AC230V | 38A | 2NO+2NC | 18.5kW motors, loads with neutral |
| 3RT6045-1AN23 | 3P+N (4P) | AC230V | 63A | 2NO+2NC | 30kW motors, loads with neutral |
- Key Selection & Replacement Notes
4.1 Direct 3TF-to-3RT6 Replacement Table (Core)
| Legacy 3TF Model | Recommended 3RT6 Replacement | Key Matches | Difference |
| 3TF3000-0XM0 | 3RT6016-1AN21 | 9A, AC230V, 1NO | Same size, improved electrical life |
| 3TF3300-0XM0 | 3RT6017-1AN20 | 17A, AC230V, 1NO+1NC | Same size, longer mechanical life |
| 3TF4322-0XM0 | 3RT6026-1AN20 | 25A, AC230V, 2NO+2NC | Perfect drop-in, compatible mounting, higher breaking capacity |
| 3TF4400-0XM0 | 3RT6034-1AN20 | 38A, AC230V, 2NO+2NC | Upgraded size for higher-power motors |
4.2 Critical Selection Rules
- Coil voltage must match: AC coils use M/A/F/Q; DC coils use B/F to avoid burnout.
- Auxiliary contacts as needed: S00/S0 have integrated contacts; S1 and above require 3RH series add-on blocks.
- Breaking class: Standard duty = S class (≤150kA@400V); heavy-duty / high short-circuit = K/H class.
- Accessory expansion: Supports shunt trip, undervoltage trip, surge suppressors; accessories compatible with 3RT5/6 series.
- List Usage Instructions
- This list covers general industrial models. For special applications (explosion-proof, high protection), refer to Siemens’ official full catalog.
- When replacing, strictly match poles, current, coil voltage and auxiliary contacts to ensure mounting and system compatibility.
- For 4-pole versions, higher breaking class or special accessories, provide additional requirements for refined model selection.
