三菱 S-T35 AC200V 電磁接触器

The S-T35 AC200V is a 3-pole non-reversing 電磁接触器 の 三菱電機 MS-T Series. It has a rated current of 40A, compatible with 18.5kW @ 400V three-phase motors. Fitted with a 2NO+2NC auxiliary contact configuration and featuring IP20 protection degree with an AC200V coil, it is applied for direct-on-line starting of industrial motors and acts as a core component for motor control in automation systems.

1. 型式コードの説明

完全なモデル定義: S-T35 AC200V = Mitsubishi MS-T Series, frame size 35, AC200V coil, 3-pole 40A non-reversing magnetic contactor

2. 主要な技術仕様

3. 全モデルリスト (MS-T Series Non-reversing Contactors)

4. 代替モデル & 競合他社の比較

4.1 Mitsubishi Internal Replacements

4.2 ブランド間の競合他社の比較

5. アプリケーション環境 & 業界の事例

5.1 推奨アプリケーション

産業用モーター制御: Direct-on-line starting for three-phase motors such as pumps, ファン, コンプレッサーとコンベア

OEM Equipment: Supporting machine tools, 包装機械, printing machines and textile machinery

建物の電気システム: Control of critical motors including air conditioning units, fire water pumps and drainage pumps

一般産業: Motor control for production lines, automation equipment and material handling systems

商業施設: Control of refrigeration units, ventilation equipment and water pumps

5.2 推奨されないアプリケーション

Single-phase Motor Control: 3-pole design not suitable for single-phase circuits

高周波スタートストップ: 以上 1200 cycles per hour will shorten service life

High Altitude (>2000メートル): ディレーティングが必要 (10% reduction per 1000m elevation rise)

Severe Vibration Environments: Extra reinforcement is required to avoid malfunction

Corrosive Environments: IP20 protection is insufficient; additional enclosure is needed

5.3 代表的な応用例

場合 1: Fan System in Food Processing Plant

装置: 3 sets of 18.5kW centrifugal fans, 400V三相

構成: S-T35 AC200V + TH-T35 thermal overload relay + ノーヒューズサーキットブレーカー

結果: Realizes sequential start-up and overload protection; the system operates stably with zero faults over 3 年.

場合 2: Water Pump Control in Wastewater Treatment Plant

装置: 5 sets of 15kW submersible pumps, 400V三相

構成: S-T35 AC200V + PLC linkage control + GV2P32 motor circuit breaker

特徴: Low power design reduces cabinet temperature rise; 2NO+2NC contacts meet the demands of status monitoring and alarm output.

6. トラブルシューティング & Maintenance Manual

6.1 一般的な障害 & ソリューション

6.2 Maintenance Procedures

1. 日常点検 (毎週)

Check appearance for abnormal heat, odour or noise

Ensure terminals are tight with no overheating marks

Test auxiliary contacts to confirm synchronous operation with main contacts

2. 定期的なメンテナンス (毎 6 月)

Cut off power and remove dust from contactor and core surface

Inspect main and auxiliary contacts for burning and oxidation

Test coil resistance and insulation performance

3. 年次メンテナンス

Check lubrication of mechanical parts and apply grease if needed

Verify operational flexibility and reliability

Retighten all electrical connections and replace aged components

6.3 Quick Diagnosis Tips

No pull-in? Check voltage and coil resistance first.

Loud noise? Clean core; replace if shading ring breaks.

焼けた接点? Limit current and reduce switching cycles.

Signal error? Inspect linkage and correct NO/NC wiring.

7. 選択 & 設置ガイドライン

7.1 選択ルール

現在のマッチング: Motor Full Load Current (FLA) ≤ 40A; optimal for 18.5kW @ 400V motors

コイル電圧: Confirm control circuit voltage is AC200V to avoid mismatch

保護調整: Use with thermal overload relays (例えば. TH-T35) and motor circuit breakers

Derating for High Temperature: ディレート 1% per ℃ above 40℃

7.2 インストールに関する注意事項

取付方向: 縦置き設置 (allowable deviation: ±15°) to guarantee arc extinguishing performance and mechanical life

クリアランス: Reserve 10mm space on left & 右, 20mm on top & bottom for heat dissipation

配線規格: 1.5-35mm² copper wire for main circuit (トルク: 6-8Nm); 0.5-1.5mm² copper wire for control circuit (トルク: 0.8-1.2Nm)

Interlock for Reversing Operation: Fit mechanical interlock to prevent phase short circuit

Protection for Harsh Environments: Install extra enclosure for dusty or humid conditions

8. Production Status & 代替ソリューション

Current Status of S-T35 AC200V: In production, no discontinuation plan (as of June 2026)

アップグレード & 交換オプション:

1. Functional Upgrade: S-T35BC/SA series (built-in surge suppressor to reduce external components)
2. インテリジェントなアップグレード: Mitsubishi NF series (with communication function for remote monitoring)
3. 国内代替品: Chint NXC-40, Delixi CDC1 series (lower cost with equivalent performance)

Application Cases of Mitsubishi S-T35 AC200V Magnetic Contactor

Featuring a 40A rated current, 2NO+2NC auxiliary contacts and low-power AC200V coil, the S-T35 AC200V is widely used for 18.5kW @ 400V three-phase motor control. It serves industries including water treatment, 食品加工, 自動車製造, 繊維 & dyeing, building HVAC, delivering reliable solutions for direct-on-line starting and status monitoring.

1. Overview of Main Application Fields

The S-T35 AC200V is compatible with 18.5kW @ 400V (or 11kW @ 220V) three-phase squirrel-cage induction motors. Typical applications are listed below:

2. 詳細な業界適用事例

場合 1: 1+1 Standby Control System for 15kW Submersible Pumps in Wastewater Treatment Plant

プロジェクトの背景

Phase II project of an urban wastewater treatment plant. Five aeration tanks are equipped with 15kW submersible pumps for 24-hour continuous aeration. The system requires automatic duty/standby switching and automatic alarm upon faults.

Equipment Configuration

Main units: 5 sets of 15kW 400V three-phase submersible pumps

Control components: S-T35 AC200V contactor + TH-T35 thermal overload relay + GV2P32 motor circuit breaker + Mitsubishi FX3U PLC

Auxiliary components: GVAE11 auxiliary contact block (ステータス監視) + Audible & visual alarm + Manual/Auto selector switch

Solution Features

1. 冗長設計: Independent control circuit for each pump to ensure uninterrupted operation
2. Status monitoring: 2NO+2NC contacts of S-T35 connect to PLC and alarm system for real-time status feedback
3. 省エネ: 18VA pull-in power and 3.8W holding power reduce energy consumption and cabinet temperature rise
4. Multi-level protection: Circuit breaker for short-circuit protection, thermal relay for overload protection and contactor for circuit breaking to ensure equipment safety

Application Results

安定した動作 3 years with zero unplanned shutdown

Automatic switching time ≤ 2 秒, meeting process continuity requirements

15% energy saving compared with traditional contactors

40% lower maintenance cost and high versatility of spare parts

場合 2: Temperature Control System for 18.5kW Centrifugal Fans in Food Processing Plant

プロジェクトの背景

The sterilization workshop of a dairy plant needs to maintain a constant temperature of 120℃. Three 18.5kW centrifugal fans are deployed to automatically adjust operating quantity according to ambient temperature for energy saving.

Equipment Configuration

Main units: 3 sets of 18.5kW 400V three-phase centrifugal fans

Control components: 3 × S-T35 AC200V contactors + Temperature sensors + 三菱シーケンサ + HMI

保護コンポーネント: Moulded case circuit breaker + サーマルリレー + Phase sequence protection relay

Solution Features

1. Graded control: Automatically run 1/2/3 fans according to temperature ranges (≤115℃ / 115-125℃ / ≥125℃)
2. Star-delta starting: Reduces inrush current; the contactor withstands high starting impulse current effectively
3. Visualization: HMI displays real-time operating status, current and temperature of each fan
4. Maintenance reminder: Cumulative runtime recording reminds users of regular contactor maintenance

Application Results

Temperature control accuracy improved to ±1℃, product yield increased by 3%

22% 省エネ, saving approximately 120,000 RMB on electricity annually

Extended fan service life and reduced replacement frequency

Simplified operation with less manual intervention

場合 3: Conveyor Interlock Control System in Auto Parts Factory

プロジェクトの背景

The assembly line of an automotive seat factory consists of 12 conveyors driven by 15kW motors. The system requires sequential start-up from feed end to discharge end, reverse sequence shutdown, and full-line shutdown protection once any conveyor fails.

Equipment Configuration

Main units: 12 sets of 15kW 400V three-phase conveyor motors

Control components: 12 × S-T35 AC200V contactors + 三菱シーケンサ + 6 非常停止ボタン + Safety relay

Signal system: 12 × GVAE11 auxiliary contact blocks (ステータスフィードバック) + 24 インジケーターライト (operation/fault)

Solution Features

1. Interlock logic: PLC realizes interlock between conveyors via contactor auxiliary contacts to prevent material accumulation
2. 安全設計: Emergency stop signal directly cuts off coil power of all contactors with response time ≤ 0.1 2番
3. Fast fault diagnosis: Contactor status uploaded to PLC for quick fault location
4. モジュラー設計: Unified model reduces spare parts inventory and maintenance costs

Application Results

Production line failure rate reduced by 60%, production capacity increased by 15%

Average fault troubleshooting time shortened from 45 minutes to 5 分

Improved operational safety with zero safety incidents

30% lower spare parts cost and higher maintenance efficiency

場合 4: Dual-motor Control System for Carding Machine in Textile Mill

プロジェクトの背景

Renovation of BEFAMA CRIII carding machine in a wool textile mill. The original 37kW wound rotor motor with large starting current is replaced by a 7.5kW + 11kW dual-motor drive (total power 18.5kW), requiring synchronous start and balanced load.

Equipment Configuration

Main units: 7.5kW + 11kW 400V three-phase dual motors

Control components: 2 × S-T35 AC200V contactors + Mitsubishi inverter + PLC + Current sensors

保護コンポーネント: 2 × thermal overload relays + Short-circuit protection circuit breaker

Solution Features

1. Load balancing: PLC monitors motor current via sensors and dynamically adjusts inverter output
2. Smooth start: Combined inverter and contactor reduces starting current from 68A to 28A and minimizes grid fluctuation
3. Energy-saving operation: Motor speed automatically adjusted according to load, 30% energy saved
4. 障害保護: Both contactors trip simultaneously if either motor is overloaded to avoid equipment damage

Application Results

Starting current reduced by 59%, eliminating grid fluctuation

30% 省エネ, saving approximately 80,000 RMB on electricity annually

Extended equipment service life, maintenance cycle prolonged to 1 年

Improved product quality and wool sliver uniformity by 2%

3. Application Classification & 選定ガイドライン

3.1 In-depth Analysis of Applicable Scenarios

3.2 推奨されないシナリオ & 代替案

4. まとめ & 選択の推奨事項

4.1 Application Value Summary

高い信頼性: 10 million mechanical cycles and 1 million electrical cycles (AC-3 40A/400V) for long-term industrial operation

コスト効率: 低消費電力 (18VA pull-in, 3.8W holding) cuts operational cost and heat generation inside cabinets

柔軟性: 2NO+2NC auxiliary contacts support status monitoring, alarm and interlock functions

優れた互換性: Matches GV2/GV3 motor circuit breakers and TH-T thermal overload relays to form a complete protection system

4.2 選択ニーモニック

Ideal match for 18.5kW motors, S-T35 is your first choice

AC200V coil fits well, low power saves energy all the way

2NO plus 2NC contacts complete, for monitoring and alarm needs

IP20 solid protection, stable performance in industrial sites

4.3 Application Optimization Suggestions

1. 保護のマッチング: Equip with thermal overload relays (例えば. TH-T35) and motor circuit breakers for dual protection against overload and short circuit.
2. Installation Standard: 垂直に取り付ける (±15°); reserve sufficient heat dissipation space (10mm left/right, 20mm top/bottom).
3. 配線仕様: 1.5-35mm² copper wire for main circuit (torque 6-8Nm); 0.5-1.5mm² copper wire for control circuit (torque 0.8-1.2Nm).
4. メンテナンスサイクル: Inspect contacts every 6 月; replace frequently operated contactors annually.
5. High-temperature Adaptation: ディレート 1% per ℃ when ambient temperature exceeds 40℃.