Allen-Bradley 100-C85A00 AC Contactor

Nota importante: The standard coil of 100-C85A00 is AC240V 60Hz, NOT 220V 50Hz.

Preferred replacement for domestic 220V 50Hz supply: 100-C85KF00 (AC230V 50/60Hz universal for 220V applications)

Specifiche di base

Serie: 100-C IEC AC Contactor (Allen-Bradley, Rockwell Automazione)

Contatti principali: 3-polo n, AC-3 rated current 85A

Contatti ausiliari: 0NO+0NC (no built-in auxiliary contacts); external auxiliary contact modules available

Terminali: Morsetti a vite; coil terminals on Line Side

Montaggio: 35Guida DIN da mm

Standard: CEI/EN 60947-4-1, UL, Certificazione CCC

Ciclo vitale: 100-C85A00 discontinued; 100-C85KF00 active

Power Ratings (Carico motore AC-3)

230V trifase: 30HP

460V trifase: 60HP

575V trifase: 60HP

Ripartizione del modello

100-C85 A 00

100-C: MCS-C IEC contattore serie

85: AC-3 rated current 85A

UN: Coil code → AC240V 60Hz

00: Configurazione contatti ausiliari: 0NO+0NC

In-stock same-frame models for 220/230V

100-C85KF00: AC230V 50/60Hz coil (first choice for domestic 220V, no built-in aux contacts)

Con contatti ausiliari incorporati: 100-C85KF10 (1NO), 100-C85KF01 (1NC)

Linee guida per la sostituzione

1. Never directly replace 100-C85A00 (240V 60Hz) on domestic 220V 50Hz supply; insufficient pull-in force will cause chattering and coil burnout.
2. Sostituzione preferita: 100-C85KF00
3. Equivalente domestico: CJX2-8011; Schneider LC1D80

Accessori compatibili

Blocco contatti ausiliari: 100-F (1NO/1NC)

Soppressore di sovratensioni: 100-UN (RC type), 100-AR (varistor type)

Matching overload relay: 193-Serie E

Replacement Cross Reference for 100-C85KF00 (AC-3 85A, Bobina AC230V, 0NO+0NC)

Nota: Allen-Bradley offers 85A frame; Siemens and Schneider do not have an exact 85A model. The standard equivalent is the 80A frame with sufficient margin; select 95A for full current coverage.

Bobina: AC220/230V 50/60Hz for domestic use; all models come with built-in auxiliary contacts (no native 0-aux version; block off unused contacts if required).

Spiegazione del modello & Auxiliary Contact Notes

1. Siemens 3RT6037-1AN00

3RT6: SIRIO domestico; 037: 80UN; 1AN00: AC220V 50/60Hz

Limitazione: This frame always comes with 1NO+1NC built-in; no native zero-aux version. Cover unused contacts if the drawing requires 0NO+0NC.

2. Schneider LC1D80M7C

LC1D: TeSys Deca; 80: AC-3 80A; M7: AC220V 50/60Hz

Same limitation: 1NO+1NC built-in; no zero-aux original model.

3. If you strictly require zero built-in auxiliary contacts (all aux contacts external only):

Siemens and Schneider do not produce native zero-aux models in this current range due to design differences. This will not affect wiring or PLC logic; only drawing notation needs revision.

Motor Power Equivalence (400V trifase)

AB 100-C85KF00: 45kW

3RT6037-1AN00 / LC1D80M7C: 40kW

3RT6044-1AN00 / LC1D95M7C: 50kW

Matching Overload Relays

Allen-Bradley: 193-Serie E

Siemens: 3RU6137 (for 3RT6037)

Schneider: LRD43 (for LC1D80)

Replacement Risk Warnings

1. Mounting dimensions and DIN rail positions are similar, but terminal layout and overall height differ. Verify outline drawings before retrofitting existing panels.
2. Coil pull-in voltage range and power consumption differ slightly; do not reuse old coil parameters directly.
3. For AC-4 jogging and frequent forward/reverse operation, select the 95A frame instead of 80A.
4. Never directly replace 100-C85A00 (240V 60Hz); always use the KF coil variant first.

Additional Domestic Alternatives

CJX2-8011 (Bobina AC220V, 80UN, 1NO+1NC built-in)

Allen-Bradley Bulletin 100-C (IEC AC Contactor) Full Catalog List

Serie: 100-C = standard 3-pole contactors (AC-3); 104-C = reversing contactors (avanti/indietro); 100S-C / 104S-C = positively guided safety contactors

Model Rule: `100-Cxx△yy`

xx: Corrente nominale AC-3

△: Codice bobina (Chiave: KF=AC230V 50/60Hz, first choice for domestic 220V supply)

yy: Contatti ausiliari incorporati: 00=0NO+0NC; 10=1NO; 01= 1 NC; 11=1NO+1NC

1. Current Frame Base Models (swap coil code only)

2. Coil Code Reference (Most Common Domestic Types)

Auxiliary suffix: 00 /10 /01 /11

Esempio: 100-C85KF00 = 85A, AC230V, zero built-in aux contacts; 100-C85KF10 = 85A, 230V, 1NO built-in

3. Full Active Catalog Numbers (3-palo, terminali a vite, line-side coil)

09UN

100-C09KJ00 / 100-C09KJ10 / 100-C09KJ01 / 100-C09KJ11

100-C09KF00 / 100-C09KF10 / 100-C09KF01 / 100-C09KF11

100-C09KV00 / 100-C09D00

12UN

100-C12KJ00 / 100-C12KF00 / 100-C12KV00 / 100-C12D00

16UN

100-C16KJ00 / 100-C16KF00 / 100-C16KV00 / 100-C16D00

23UN

100-C23KJ00 / 100-C23KF00 / 100-C23KV00 / 100-C23D00

30UN

100-C30KJ00 / 100-C30KF00 / 100-C30KV00 / 100-C30D00

37UN

100-C37KJ00 / 100-C37KF00 / 100-C37KV00 / 100-C37D00

43UN

100-C43KJ00 / 100-C43KF00 / 100-C43KV00 / 100-C43D00

50UN

100-C50KJ00 / 100-C50KF00 / 100-C50KV00 / 100-C50D00

60UN

100-C60KJ00 / 100-C60KF00 / 100-C60KV00 / 100-C60D00

72UN

100-C72KJ00 / 100-C72KF00 / 100-C72KV00 / 100-C72D00

85UN

100-C85KJ00

100-C85KF00 (domestic 220V standard model)

100-C85KF10, 100-C85KF01, 100-C85KF11

100-C85KV00

100-C85D00

100-C85A00 (legacy 240V 60Hz; not recommended for direct domestic replacement)

97UN

100-C97KJ00 / 100-C97KF00 / 100-C97KV00 / 100-C97D00

4. 104-C Reversing (Avanti/Indietro) Complete Catalog Numbers (integrated mechanical interlock)

Formato: 104-CxxKF22 (22 = 1NO+1NC built-in aux contacts)

104-C09KF22, 104-C12KF22, 104-C16KF22, 104-C23KF22

104-C30KF22, 104-C37KF22, 104-C43KF22, 104-C50KF22

104-C60KF22, 104-C72KF22, 104-C85KF22, 104-C97KF22

5. Compatible Spare Parts (Universal for all 100-C frames)

Blocco contatti ausiliari: 100-FA11 (1NA+1NC), 100-FA20 (2NO), 100-FA02 (2NC)

Soppressione delle sovratensioni: 100-UN (Ammortizzatore RC), 100-AR (varistore)

Matching overload relay: 193-Serie E (direct plug-on fit with 100-C)

Interblocco meccanico: 100-M05 for C09~C43; 100-M13 for C50~C97

6. Note sulla selezione
7. 100-C is an IEC frame, not NEMA; NEMA contactors are the 100-D series with higher current ratings.
8. Screw terminals are standard; spring-clamp terminals carry the CR suffix (100-CR…).
9. Ciclo vitale: 100-C85A00 (A coil) interrotto; KF coil variants remain active with CCC certification for mainland China.
10. 4-contattori polari: 100-Cxx□400 (4NO main contacts for resistive loads only).
11. Overload Relay Quick Matching (193-E)

C09~C16: 193-EECB

C23~C43: 193-EEED

C50~C72: 193-EEEE

C85 / C97: 193-EEEF

Difetti comuni & Troubleshooting for Allen-Bradley 100-C /100S-C /104-C Contactors

Applicable to your 100-C series. Importante: No separate replacement parts for main contacts, armature cores or springs for the 100-C frame. Only coils can be ordered individually; replace the entire unit if mechanical or contact damage occurs.

Precauzioni di sicurezza: Isolate power, apply lockout/tagout, and verify zero voltage before maintenance.

1. Bobina eccitata, contactor fails to pull in completely

Sintomo: No movement or sound when control voltage is applied

Cause profonde

1. Missing coil supply, broken wiring, open emergency stop / interblocco di sicurezza / interlocking contacts
2. Avvolgimento della bobina aperta (resistance reading infinite on multimeter)
3. Wrong coil specification (caso tipico: 100-C85A00 (AC240V 60Hz) connected to 220V 50Hz supply → insufficient pull-in force or no pull-in)
4. Mechanical binding: iron core clogged with metal dust, dirt, deformed housing, jammed guide rail or fatigued return spring
5. Control voltage lower than 85% di valore nominale

Soluzioni

1. Measure voltage directly at coil terminals (not just power supply terminals); check E-stop, cancelli di sicurezza, PLC outputs and 104-C mechanical interlocks
2. Verify coil catalog code (KF=AC230V, KJ=AC24V, KV=AC110V, D=24 V CC)
3. Replace coil if open circuit; replace the whole contactor if core jamming or housing deformation occurs
4. Clean dust and oil from pole faces; check for skewed mounting
5. Chiacchiere, loud buzzing, repeated pull-in and drop-out (contact chatter)

Sintomo: Rapid “click-click” vibration with continuous hum; contacts cycle rapidly and burn quickly

Cause profonde

1. Low control voltage, excessive voltage drop on long cables, insufficient power supply capacity (most frequent cause)
2. Dirty, rusted or oily core pole faces with poor contact; broken short-circuit ring on AC coils (100-C AC models)
3. Wrong coil rating (60Hz North American coil used on 50Hz mains)
4. Poor contact on auxiliary contacts causing loose holding/latching circuit
5. Loose DIN rail mounting leading to cabinet resonance

Soluzioni

1. Measure coil voltage under load; maintain voltage within 85%~110% of rated value
2. Clean pole faces when de-energized; replace the entire contactor if the short-circuit ring is broken (no spare ring available)
3. Replace legacy A-code (240V 60Hz) coils with KF-code (AC230V 50/60Hz universal) bobine
4. Tighten DIN rail and mounting screws
5. Repeated coil burnout and excessive overheating

Sintomo: Discolored coil with burnt odor and melted insulation; repeated coil failure within short periods

Cause profonde

1. Sustained overvoltage (>110% valutato) or sustained under-voltage with incomplete core closure (large magnetizing current due to air gap)
2. Operating frequency exceeding the rated mechanical operation rate of the 100-C series
3. Temperatura ambiente elevata, scarsa ventilazione dell'armadio, and overcrowded contactors with no heat gap
4. No surge suppression for frequent switching of inductive loads (motori, elettrovalvole)
5. Misapplication: AC coil used on DC supply

Soluzioni

1. Eliminate mechanical binding to ensure full core closure; stabilize supply voltage
2. Upgrade to 100-E series or select one frame larger for high-frequency jogging duty
3. Maintain spacing between contactors; add cabinet cooling fans; install surge suppressors 100-A (RC) / 100-AR (varistore)
4. Nota: Standard DC coils run hot with continuous energization (no energy-saving circuit)
5. Main contact erosion, scolorimento, perdita di fase, surriscaldamento, weak motor torque

Sintomo: Hot terminal lugs, unbalanced three-phase current, motor hunting, frequent overload relay tripping

Cause profonde

1. Continuous overload or AC-4 jogging / frequent forward-reverse operation with undersized contactor (AC-3 and AC-4 ratings differ significantly)
2. Loose terminal screws creating high contact resistance and thermal runaway
3. Arc erosion and end-of-life contact wear
4. Mismatched upstream circuit breaker/fuse protection leading to short-circuit damage to contacts

Soluzioni

1. Retorque main terminal screws per Rockwell torque specifications
2. Measure three-phase current and re-evaluate load rating; select one frame larger for AC-4 duty (upgrade C85 to C97)
3. Replace the entire contactor if contacts are heavily arced; do not file or repair contacts for long-term service
4. Verify SCCR short-circuit coordination with upstream protection devices
5. Failure to drop out after de-energization; saldatura a contatto (HAZARD CONDITION)

Sintomo: Main contacts remain closed even after coil power is removed; motor cannot stop

Cause profonde

1. Severe short-circuit or locked-rotor current melting contact silver plating (most dangerous failure mode)
2. Progressive welding caused by continuous contact chatter and repeated arcing
3. Fatigued return springs or oil-sticky pole faces preventing core release
4. Jammed mechanical interlock on 104-C reversing contactors

Soluzioni

1. ⚠️ Never pry welded contacts open for continued service; replace the whole unit immediately
2. Investigate phase short circuits, motor stall conditions, and implement triple protection (program interlock + interblocco elettrico + interblocco meccanico) for forward/reverse circuits
3. Upsize contactor rating, add current limiting, adjust star-delta timing, and fit surge suppressors if welding recurs
4. Inspect 100-Mxx mechanical interlock parts for deformation or jamming on 104-C units
5. Auxiliary contact failures (external 100-FA blocks)

Sintomo: Unstable PLC feedback, intermittent latching, lost control signals

Cause profonde

1. Poorly latched auxiliary contact modules with loose snap-on clips
2. Auxiliary contacts rated only for low-power control circuits; cannot directly drive solenoid loads
3. Arc burn and mechanical fatigue
4. Failed positively guided mirror contacts on 100S-C safety models (safety circuit risk)

Soluzioni

1. Reinstall 100-FA modules and confirm full clip engagement
2. Use auxiliary contacts only for dry control signals; do not switch high-power solenoids directly
3. Use 100S-C positively guided safety contactors for safety feedback circuits; never use standard 100-C models
4. Special Faults for 104-C Reversing (Avanti/Indietro) Contattori

Jammed or broken mechanical interlock: 100-Mxx interlock parts can be ordered separately for replacement

Simultaneous pull-in of forward and reverse contactors: Implement three-level interlock (program logic + interblocco elettrico + interblocco meccanico) and avoid short transition timing

8. Ambientale & Aging Failures

Umidità, corrosive gas and dust: Core rusting, insulation degradation and leakage current

High-altitude or high-temperature enclosures: Derate current rating and select one frame larger

Long-term storage: Dust buildup on pole faces; manually test mechanical operation before power-up

Step-by-Step On-site Troubleshooting Procedure

1. De-energize power → Visual inspection: burnt marks, scolorimento, terminali allentati, deformed housing
2. Measure coil resistance and cross-check coil voltage catalog code
3. Manually depress the contactor to check for smooth mechanical movement and binding
4. Apply power under supervised conditions; measure coil voltage under load to rule out undervoltage
5. Test continuity across main three-phase contacts to detect welding or open phases
6. Check auxiliary contacts, interblocchi, emergency stops and safety loops

Selezione chiave & Note applicative (for your 100-C85KF00)

Never replace KF coils with legacy A coils (240V 60Hz); chatter and coil burnout will occur on 50Hz mains

No separate main contact kits for 100-C; replace the whole unit once contacts are damaged; only coils are available as spare parts

Upsize one frame for AC-4 jogging and frequent forward/reverse cycling