コンタクタ,サーキットブレーカー,ソーラーインバーター,電気メーター,太陽電池
型式コードの説明
| モデルパーツ | 説明 |
| 3RA6 | SIRIUS Compact Load Feeder / Direct On-Line Starter Series |
| 1 | Direct on-line starter type (DOL) |
| 20 | Rated operational current range: 1–4 A |
| 2 | Main circuit connection: spring-loaded terminals (1 = screw terminals) |
| CB | Control voltage: 24 AC/DCV |
| 32 | 標準バージョン: 1 いいえ + 1 NC補助接点, electronic overload protection |
- 主要な技術仕様
Electrical Data
タイプ: SIRIUS Compact Load Feeder / Direct On-Line Starter
定格電圧: 690 Vと, 3-段階
Control voltage: 24 AC/DCV (50/60 Hz)
定格動作電流: 1–4 A
Motor power rating: 1.5 kW 400 V, 3 kW 690 V
補助接点: 1 いいえ + 1 ノースカロライナ州
保護: Electronic overload protection, 短絡保護
Degree of protection: IP20
Mechanical Data
幅: 45 mm
取り付け: 標準 35 mm DINレール取付 (screw and clip fixing)
重さ: 約. 1.51 kg (3.335 lb)
Connection type: Main circuit-spring-loaded terminals; Auxiliary circuit-spring-loaded terminals
Ⅲ. 動作環境
| Environmental Parameter | Range | 備考 |
| 動作温度 | -20 °C to +60 ℃ | Accuracy of protection functions may be affected outside this range |
| Storage temperature | -55 °C to +80 ℃ | Also applicable during transport |
| Installation altitude | まで 2000 メートル | Derating by 10% per 1000 m increase in altitude |
| Relative humidity | 5% に 95% | Non-condensing, no dew formation |
| 汚染度 | 2 | Standard for industrial environments |
| Mounting position | Vertical mounting (推奨) | Derating required for horizontal mounting |
代表的な用途
Control of small fans and pumps
Light-duty equipment such as conveyors and mixers
HVAC control in building automation systems
Auxiliary equipment control in industrial automation production lines
Replacement of conventional contactor + thermal relay combinations to save cabinet space
- Replacement Models and Brand Comparison
Siemens Replacement in Same Series
| モデル | 違い | Suitable Application |
| 3RA6120-1CB32 | Main circuit with screw terminals | Environments with high vibration requiring more secure wiring |
| 3RA6120-2CB31 | Different auxiliary contact configuration | Special control circuit requirements |
Replacement Models from Other Brands
| ブランド | モデル | 主要なマッチングパラメータ |
| シュナイダーエレクトリック | LC1D09 + LRD06 | 9 コンタクタ + 0.63–1 A thermal relay, に適した 1.5 kW motors |
| ABB | AF09-30-00 + TA25DU0.63 | 9 コンタクタ + 0.63–1 A thermal relay |
| チント | NXC09 + NR2-25/Z | 9 コンタクタ + 0.63–1 A thermal relay |
- 公式注文情報
Official order number: 3RA6120-2CB32 (globally unified)
Product status: Active product (PLM: PM300)
Minimum packaging: 1 unit/package
認証: CE, UL, CSA and other international certifications
- Complete Model List for 3RA61 Series (1–4 A Range)
| モデル | Connection Type | 制御電圧 | 補助接点 |
| 3RA6120-1CB32 | ネジ端子 | 24 AC/DCV | 1 いいえ + 1 ノースカロライナ州 |
| 3RA6120-1DB32 | ネジ端子 | 110 Vと | 1 いいえ + 1 ノースカロライナ州 |
| 3RA6120-1FB32 | ネジ端子 | 220 Vと | 1 いいえ + 1 ノースカロライナ州 |
| 3RA6120-2CB32 | Spring-loaded terminals | 24 AC/DCV | 1 いいえ + 1 ノースカロライナ州 |
| 3RA6120-2DB32 | Spring-loaded terminals | 110 Vと | 1 いいえ + 1 ノースカロライナ州 |
| 3RA6120-2FB32 | Spring-loaded terminals | 220 Vと | 1 いいえ + 1 ノースカロライナ州 |
Ⅶ. Engineering Recommendations and Risk Warnings
インストールに関する注意事項
- Mounting orientation: Vertical installation preferred; 10% derating required for horizontal installation
- Heat dissipation space: Reserve at least 5 mm on both sides for adequate cooling
- 配線仕様: Main circuit conductor cross-section 0.5–2.5 mm²; auxiliary circuit 0.5–1.5 mm²
- 制御回路: Surge suppressor recommended to protect against voltage spikes
Risks in Cross-Brand Replacement
- Ensure overload protection curve matches the motor to avoid protection failure
- Spring-loaded and screw terminals are not directly interchangeable; rewiring and retightening required
- Electronic overload parameters must be reset according to motor nameplate data
- Short-circuit protection characteristics may vary between brands; short-circuit withstand rating must be verified
メンテナンスポイント
- Regularly check terminal tightness, 特に振動環境では
- Clean dust from the device surface to maintain heat dissipation
- Periodically test overload protection function
- Consider voltage stabilizer if control voltage fluctuates beyond ±10%
VIII. まとめ
Siemens 3RA6120-2CB32 はコンパクトな, コンタクタを組み合わせた統合ダイレクトオンラインスタータ, 短絡保護と電子過負荷保護. 小型三相モーター用に設計されています。 (1.5 kW 400 V, 3 kW 690 V). Featuring spring-loaded terminals for quick wiring and a narrow 45 mm width to save cabinet space, its 24 V AC/DC wide-range control voltage supports various automation systems.
Typical Applications of Siemens 3RA6120-2CB32
This is a Siemens SIRIUS compact direct on-line starter with a rated current of 1–4 A, suitable for low-power three-phase motors, especially in applications requiring small motors, light loads and compact installation space.
- Fan Applications
Small axial fans, cabinet cooling fans
Fans for air conditioning units, fresh air system fans
Small smoke exhaust fans, cooling fans
- Pump Applications
Small booster pumps, circulation water pumps
Cooling water pumps, lubrication pumps
Make-up pumps for hydraulic systems
- Conveying and Light Industry Machinery
Small belt conveyors, roller conveyors
Feeders, small elevators
Packaging machines, labeling machines, small conveyors
- Machine Tools and Automation Auxiliaries
Machine tool cooling pumps, lubrication pumps
Small chip conveyors
Drive motors for tooling and fixtures
- 食べ物, Packaging and Textile Light Industry
Small mixers and blenders
Textile small rollers, feeding mechanisms
Small drive motors for food processing
- Building and HVAC Systems
Drive for small valve actuators
Air handling unit fans, coil fans
Small water treatment supporting equipment
- General Industrial Auxiliaries
小型ファン, vibration motors
Auxiliaries for small air compressors
Auxiliary drive motors for various equipment
Suitable for all applications involving three-phase small motors up to approximately 1.5 kW 400 V with current 1–4 A, requiring direct starting, 過負荷 + 短絡保護, and compact size with fast wiring.
