NMB-MAT 3115RL-05W-B60 DC24V Industrial Axial Fan

Dimensioni: 80×80×38mm (8038), Dual-ball bearing, 2-wire version (power supply only, no tachometer feedback). Widely used for cooling inverterS, servoazionamenti and industrial control cabinets.

Specifiche elettriche principali

⚠️Suffix Distinction (Easily Confused within the Series)

B60: 2-filo, no tachometer feedback

B69: 3-filo, with tachometer (TACH) speed feedback

B66: 4-filo, PWM speed control + tachometer feedback

Dimensioni di montaggio

Flange cutout: 71.5×71.5 mm

Fori di montaggio: Viti M4, hole pitch 71.5mm

Spessore: 38mm

Scenari applicativi

Cooling for inverters (per esempio. ABB ACS880), servoazionamenti, high-power power supplies and industrial equipment enclosures.

OEM Status: NRND (Not Recommended for New Designs). Recommended replacement part number: 08038RA-24P-EA-00.

Compatibilità & Sourcing Criteria for Domestic Alternatives

All conditions must be satisfied simultaneously:

1. Form factor 80×80×38mm
2. DC24V, rated current ≥0.45A, speed 5200-5600RPM
3. Dual-ball bearing
4. Matching wiring: Do NOT select 2-wire B60 variant if equipment requires speed-monitoring signal.

Diagnosi dei guasti

1. Fan does not spin upon power-on: Verify 24V input voltage. Manually spin impeller when power is cut off. If locked-up, bearing damage has occurred; replace directly.
2. Bassa velocità & rumore anomalo: Bearing wear. Do not attempt repair in industrial environments; replace the fan.
3. Nota importante: B60 is a 2-wire fan without tachometer alarm output. If host equipment reports fan fault, the original unit requires B69 (3-wire tachometer version). B60 cannot be used as a drop-in replacement.

Replacement List for NMB 3115RL-05W-B60 (8038-24V-2-wire)

Key parameters of original fan: 80×80×38mm｜DC24V｜0.5A｜5500RPM｜Dual-ball bearing｜2-wire no tach feedback｜71.5mm mounting pitch

⚠️Critical Reminder: If the inverter triggers fan fault alarm, original hardware requires 3-wire tachometer B69. Do not apply 2-wire B60 or any 2-wire substitutes.

1. OEM Direct Replacement (NMB)

2. Delta / Sunon Foreign-brand Compatible Models

3. Domestic Industrial Alternatives (General for Inverters & Armadi di controllo)

✅Mandatory Checklist Prior to Replacement

1. Form factor: 80×80×38mm, mounting hole pitch 71.5mm for M4 screws
2. Cuscinetto: Dual-ball bearing is mandatory. Sleeve bearings have short service life and are not recommended for industrial sites.
3. DC24V power supply, rated current ≥0.45A. Insufficient current causes insufficient airflow and over-temperature protection.
4. Wiring specification: 2-filo: Red=24V+, Black=GND-. If equipment has fan fault alarm function, select 3-wire model with TACH tachometer output.
5. Gamma di velocità: 5200-5600giri al minuto. Too low speed yields insufficient static pressure & flusso d'aria, triggering inverter over-temperature tripping.

⚠️Common Pitfalls

1. 8025 (25 mm thickness) cannot replace 8038. Thickness difference of 13 mm prevents installation.
2. Avoid low-current 0.3A variants; insufficient airflow and static pressure will cause high-temperature alarms.
3. B60 is 2-wire without speed feedback. Some ABB ACS880 units are factory-fitted with B69 (3-wire tachometer). Direct installation of B60 will trigger fan fault alarms.

Typical Application Scenarios of NMB 3115RL-05W-B60 (DC24V 8038 2-filo)

Funzionalità principali: Alta pressione statica, 5500giri al minuto, dual-ball bearing, 2-wire without tach feedback, DC24V supply. Suitable for forced cooling inside equipment with high-resistance air ducts. Not applicable for systems requiring fan-fault alarm.

1. Invertitori (Most Common Deployment)
2. Internal cooling fans for certain high-power Schneider inverters, power range 7.5-30 kW air duct cooling.
3. Post-mounted cooling fans for high-power domestic inverters (Innovazione, Invt, Delta etc.), for models without fan-speed monitoring.

⚠️Note: ABB ACS880 is mostly factory-equipped with B69 (3-wire tachometer). B60 cannot be directly substituted, otherwise fan fault alarm will occur.

1. Servoazionamenti / Motion Control Units
2. Internal power-module cooling for high-power multi-axis servo units;
3. Air duct cooling for numerical-control drive units and machine-tool servo control cabinets.

Applicable condition: Equipment only supplies power to fan, no fan-speed detection & alarm function.

III. Industrial Power & Power-Electronic Equipment

1. High-power DC24V industrial switching power supplies & charging modules;
2. Power-cavity cooling for medium-small UPS uninterruptible power supplies;
3. Auxiliary cooling for energy-storage converters and compact energy-storage modules;
4. Power-device cooling for high-frequency welders and plasma power sources.
5. Industrial Chassis & Armadi di controllo
6. Exhaust ventilation inside compact industrial control cabinets;
7. Forced ventilation for industrial IPC & industrial host chassis;
8. Auxiliary cooling inside robot control cabinets.

24 VDC input, can be directly driven by PLC 24V power supply, no extra AC-DC converter required.

1. Altre attrezzature industriali
2. Apparecchiature laser: Cooling for laser power supplies and laser controller enclosures;
3. Industrial medical equipment: Power-module cooling for non-life-support industrial medical instruments;
4. Rail-transit equipment: Cooling for on-board control boxes and vehicle-mounted power modules;
5. Stage-lighting equipment: Internal cooling for high-power moving-head beam lights;
6. Apparecchiature per l'automazione: Control-box cooling for textile, printing and packaging machinery.

✅Key Engineering Application Restrictions

1. B60 is 2-wire with no tachometer feedback. Never select B60 if host equipment implements fan-fault alarm; choose B69 (3-wire tachometer) variant instead.
2. High-static-pressure characteristic: Optimized for air ducts with radiators, baffles and filter screens. For open cabinet ventilation, low-static-pressure general-purpose fans are acceptable.
3. Alimentazione elettrica: DC24V only. Do NOT connect to AC220V. Allowable operating voltage:14-27.6V.
4. OEM lifecycle status: NRND (Not Recommended for New Designs). For new-project design, use official replacement part 08038RA-24P-EA-00.

Service Life of NMB 3115RL-05W-B60 Fan

This fan adopts dual-ball bearing. NMB official datasheet specifies:

50000 hours @25℃ free-air condition (L10 life).

Definition of L10 Life

L10 life: Statistically, 90% of fans within a batch can achieve this runtime; 10% will fail earlier. It is NOT a guaranteed service life for every single unit.

Expected Service Life under Different Operating Conditions

Reference conversion: 50000 h continuous operation ≈ 5.7 years of 24-hour non-stop runtime. Industrial field conditions rarely reach theoretical rating; noise degradation is commonly observed after 3-4 years of service.

Sintomi tipici di guasto

1. Increased noise & abnormal rattling (ball-bearing wear)
2. Calo di velocità, degraded airflow & pressione statica, triggering system over-temperature alarms
3. Hard to start; fan requires manual spin-up upon power-on, eventually locks up completely.

Practical Engineering Recommendations

1. For continuously-running industrial equipment, perform preventive replacement every 2-3 anni. Avoid unplanned shutdown caused by fan seizure and consequent inverter over-temperature tripping.
2. Install filter screens for dusty cabinet environments and conduct regular dust removal to extend fan service life.
3. This model is NRND. New-project design shall adopt replacement part 08038RA-24P-EA-00, updated bearing process with identical life rating.

Supplementary Comparison

Equivalent-size sleeve-bearing fans: Typical service life 8000-15000 h, not recommended for industrial deployment.

B69 (3-wire tachometer version) shares identical bearing hardware with B60, same theoretical service life, only adds tachometer circuit.

Real-world Engineering Application Cases of NMB 3115RL-05W-B60 (2-wire 24V 8038)

Important premise: B60 is 2-wire fan without tachometer feedback. Only deploy in equipment without fan-speed detection & allarme guasto. Systems with fan-fault protection require B69 (3-wire tachometer), direct substitution is invalid.

1. Inverter Sector (Most Frequently Encountered in Teardowns)

Caso1: Cooling for 15-18.5 kW Domestic Inverters

Attrezzatura: Innovazione MD380, Invt CHV series high-power inverters, selected Delta high-power inverters

Condizioni operative: 24-hour continuous operation for textile & injection-molding machines. High-resistance radiator air duct requiring high static-pressure fan. Equipment does not monitor fan speed, powered directly by internal DC24V supply.

Failure phenomenon: After 3-4 years runtime, bearing wear causes abnormal noise and airflow reduction, triggering inverter over-temperature shutdown. Issue resolved by replacing with 3115RL-05W-B60 or domestic equivalent.

⚠️ABB ACS880 is factory-equipped with B69 (3-wire tachometer). B60 direct swap triggers fan fault alarm.

Caso2: Low-power hoist / lifting-machine inverters

-Attrezzatura: 11-22 kW hoist-dedicated inverters deployed in overhead cranes & lifting-mechanism control cabinets.

-Condizioni operative: Heavy-dust site with mixed intermittent-continuous operation. Fan mounted rear-side of power-module radiator for forced draw-through cooling.

1. Servo & Numerical-control Equipment Cases

Caso3: High-power multi-axis servo drives (no fan-monitoring variant)

-Attrezzatura: Domestic multi-axis servo units, machine-tool servo control cabinets; no fan-speed monitoring programmed in controller firmware.

Condizioni operative: Cabinet ambient temperature 40-50 ℃ inside CNC lathe & machining-center control enclosures. Fan provides forced cooling for servo power boards and IGBT power modules.

Repair scenario: Seized fan causes servo-module over-temperature & power derating; service restored after B60 replacement.

Caso4: Legacy CNC system power-supply units

Attrezzatura: Older-generation machine-tool high-power power-supply boxes with internal DC24V power rail.

Caratteristica: Equipment only supplies power to fan without speed reading; 80×80×38 mounting footprint accepts this fan directly.

III. Power-supply Sector Cases

Caso5: Industrial high-power DC24V charging-power modules

Attrezzatura: Automation-equipment charging power supplies, welder power supplies, plasma-cutting power sources.

Condizioni operative: Metal-dust-laden welding-shop environment. Fan installed behind radiator, high static pressure overcomes filter-screen and duct resistance.

Caso6: Medium-small-size industrial UPS

Attrezzatura: 5-10 kVA industrial UPS units for internal power-component cooling.

Caratteristica: Powered directly from UPS internal 24 VDC busbar; no additional AC-DC conversion required.

1. Mobiletto & Automation-equipment Cases

Case 7: Auxiliary cooling for robot secondary control cabinets

Attrezzatura: External expansion control cabinets for robots (not robot native built-in fans).

Condizioni operative: Production-line cabinet exhaust ventilation. Driven by PLC DC24V power supply, pure exhaust function without fault-detection logic.

Case 8: Laser-equipment power-supply enclosures

Attrezzatura: Fiber-laser power supplies and laser-controller cabinets.

Condizioni operative: Smoke-laden laser-processing workshops. Fan pushes air through filter screens for power-component cooling. High static pressure and dual-ball long-life are critical requirements.

1. Other-industry Real-world Cases

Case 9: High-power stage-lighting equipment

Attrezzatura: High-power beam moving-head lights, internal power-module cooling.

Condizioni operative: High-temperature high-vibration venue environment; dual-ball bearing provides vibration resistance, Ingresso alimentazione DC24V.

Case 10: Rail-transit on-board control cabinets

Attrezzatura: Vehicle-mounted electrical cabinets and metro auxiliary control modules (non-safety-critical loops).

Condizioni operative: 14-27.6 V wide-voltage input accommodates vehicle-bus voltage fluctuation. Dual-ball bearing tolerates bump and vibration.

📌Real-world Maintenance Pitfall Case

Fault scenario: Maintenance technician replaces factory-fitted B69 (3-wire tachometer) with B60 (2-filo) on ABB ACS880 inverter. Fan-fault alarm activates upon power-on and equipment refuses to run.

Causa ultima: B60 provides no tachometer-feedback signal for inverter speed detection.

Risoluzione: Install B69 variant. Disabling fan-fault detection in firmware is possible but not recommended, as thermal protection is lost.

Project-sourcing Reference

1. Spare-part replacement for legacy equipment: Use same B60 part number if original unit is B60.
2. New-project design: Model is NRND, prioritize official replacement 08038RA-24P-EA-00.
3. If equipment has fan-fault alarm function: B60 is strictly prohibited, select B69 (3-wire tachometer).

Additional Industrial Applications for NMB 3115RL-05W-B60 (Excluding Inverters, Servi & Attrezzatura CNC)

Core premise: 2-wire without tachometer feedback; host equipment must have no fan-fault alarm function. High-static-pressure 8038 DC24V dual-ball-bearing fan optimized for filter-screen & radiator-restricted air ducts.

1️⃣ Laser-processing Equipment

1. Fiber-laser power supplies & YAG laser power boxes: Power-component cooling for laser cutters & laser markers. Overcome smoke-filter-screen resistance for 24-7 factory-continuous operation. Equipment only supplies power, no fan-speed detection.
2. Laser-welding-machine control cabinets: Forced air-cooling for laser-driver modules, deployed in metal-dust-heavy sheet-metal-processing workshops.

Maintenance case: Bearing wear reduces airflow and degrades laser-output power; performance restored after B60 replacement.

2️⃣ Welding & Plasma-cutting Equipment

1. Inverter plasma-cutting power supplies: IGBT radiator cooling for metal-dust-rich workshop environments. High static pressure penetrates dust-proof screens.
2. Industrial inverter welders & high-frequency induction-heating power supplies: High-power solid-state-component cooling via on-board DC24V supply.

3️⃣ Power-supply, Energy-storage & UPS Industry

1. High-power industrial DC-DC switching power supplies & charging modules: Internal cooling for automation-equipment power supplies and electronic-load test benches.
2. Medium-small-size industrial UPS (5-10 kVA): Power-cavity cooling powered directly by UPS internal 24 VDC busbar.
3. Compact energy-storage modules & residential energy-storage converter auxiliary cooling: Apply only to non-safety-critical circuits without fan-diagnostic logic.

4️⃣ Industrial Chassis & Robot Auxiliary Electrical Cabinets

1. Industrial IPC & compact sealed industrial chassis: Internal exhaust ventilation for filter-equipped enclosures.
2. Robot external expansion control cabinets (not robot native internal fans): Exhaust ventilation for production-line robot auxiliary cabinets, driven by PLC DC24V power supply.
3. ATE test-equipment cabinets & automated-test platforms: Power-module cooling for automatic-test-system hardware.

5️⃣ Rail-transit & Vehicle-mounted Industrial Equipment (Non-safety-critical Loops)

1. Metropolitana / train auxiliary on-board control boxes and vehicle-mounted signal peripheral cabinets: 14-27.6 V wide-voltage range accommodates vehicle-bus voltage fluctuation; dual-ball bearing resists mechanical shock and vibration.

Nota: Safety-relevant on-board hardware normally specifies B69 tachometer variant. B60 is limited to non-safety-critical circuits.

6️⃣ Stage-lighting & Audio-visual Equipment

1. High-power beam moving-head lights & stage high-power LED luminaire power compartments: High-vibration venue environment; dual-ball bearing anti-vibration performance, DC24V power supply.
2. High-power industrial power amplifiers & public-address power-amplifier enclosures.

7️⃣ Semiconductor & SMT Automation Equipment

1. SMT pick-and-place machine auxiliary power boxes & PCB-inspection-equipment electrical enclosures: Sub-module cooling (main-unit fans use dedicated tachometer-equipped variants).
2. Dispensing machines & spray-coating-equipment control-box cooling.

8️⃣ Other Specialized Industrial Equipment

1. Stampa & textile-machinery electrical cabinets: Power-unit cooling inside printing presses and warp-knitting-machine control enclosures.
2. Laboratory high-power instrumentation: High-power electronic loads and burn-in-test benches.
3. Packaging-machinery electrical cabinets.

⚠️Hard Sourcing Rules for Engineering Practice

1. B60 is 2-wire and has no speed-signal output. Never deploy B60 for any equipment with fan-fault-alarm or fan-stall-detection logic; select B69 (3-wire tachometer) instead.
2. Prefer this fan for air ducts fitted with radiators and filter screens. Low-static-pressure general-purpose fans suffice for open unrestricted-airflow cabinet ventilation.
3. OEM lifecycle status: NRND. New-project design prioritizes official replacement part 08038RA-24P-EA-00.
4. For dusty / oil-mist industrial environments, schedule preventive replacement every 2-3 years to avoid unexpected equipment over-temperature shutdown.