STD250-FF1 Brushless DC Motor for FFU — 100 W, 220 VAC, Sensorless
STD250-FF1 Brushless DC Motor for FFU — 100 W, 220 VAC, Sensorless
SKU: 2002-BLDC-STD250-FF1
STD250-FF1 is a 3-phase sensorless brushless DC motor made by Senter Motor for FFU and clean-air fans. With the Senter control board and its matched Ø470 mm impeller it draws 100 W at 930 rpm, accepts 175–265 VAC, and is speed-controlled by a 0–5 V DC signal with FG feedback. Available as motor only, control board only, or a complete motor + impeller + control board set.
- Motor Type 3-Phase Brushless DC, Sensorless
- Rated Voltage AC 220 V (control board input)
- Load Power 100 W ±8%
- Load Speed 930 ±30 rpm
- Speed Control 0–5 V DC
- Noise ≤45 dB (no load)
- Matched Impeller Ø470 mm
Product Description
STD250-FF1 is a 3-phase brushless DC motor designed and manufactured by Senter Motor for FFU (fan filter unit) and clean-air fan applications. It uses 180° sinusoidal drive with sensorless (Hall-free) position detection, accepts 175–265 VAC at the control board input, and is speed-controlled by a 0–5 V DC signal with FG speed feedback.
Tested with the Senter control board and its matched Ø470 mm impeller, the motor draws 100 W at 930 rpm under load, with no-load noise of ≤45 dB and vibration of ≤1.6 mm/s.
Supply Options
| Option | Includes |
|---|---|
| Motor only | STD250-FF1 motor |
| Control board only | Senter control board (driver) |
| Complete set | Motor + Ø470 mm matched impeller + control board |
The impeller is supplied only as part of the complete set. Motor, impeller, and control board are matched; the rated performance on this page is measured with that combination.
Product Features
- 3-phase BLDC, 12 slots / 8 poles, 180° sinusoidal drive
- Sensorless (no Hall) position detection
- 0–5 V DC speed control with FG speed feedback
- Wide input range 175–265 VAC (rated 220 VAC)
- Class B insulation, PA66 flame-retardant end insulation
- 6202ZZ double-shielded bearings
- Clockwise rotation viewed from shaft end
Performance
Measured with the Senter control board and the Ø470 mm matched impeller at 10–35 °C, 30–90% RH, shaft horizontal. Values are for reference.
| Item | No Load | Load |
|---|---|---|
| Input power | 17 W ±8% | 100 W ±8% |
| Current | 0.16 A ±8% | 0.84 A ±8% |
| Speed | 2000 ±30 rpm | 930 ±30 rpm |
- Winding temperature rise: ≤78 K (load)
- Noise: ≤45 dB, no abnormal sound (no load)
- Vibration: ≤1.6 mm/s (no load)
Dimensions
| Item | Value |
|---|---|
| Flange diameter | Ø151 mm |
| Mounting hole circle | Ø140 ±0.3 mm |
| Motor body diameter | Ø123 mm |
| Motor body length | 88 mm |
| Shaft end to flange | 94.5 ±2 mm |
| Shaft | Ø14 mm (−0.02/−0.04), flat 13 mm (0/−0.2), flat length 20 ±0.5 mm |
| Shaft extension | 30 ±0.5 mm |
| Lead length | 950 ±20 mm (to connector 1050 ±30 mm) |
See the outline drawing in the gallery for full dimensions.
Starting Performance
- Room temperature: after 4 h at 25 ±3 °C with the specified load, starts at 65% of rated voltage or lower.
- Low temperature: after 4 h at −10 ±3 °C with the specified load, starts at 75% of rated voltage or lower.
Insulation & EMC Immunity
| Test | Condition | Requirement |
|---|---|---|
| Dielectric strength | AC 1500 V, 50/60 Hz, 1 min, leads to housing (production: AC 1800 V, 1 s) | No damage, leakage ≤5 mA |
| Insulation resistance | DC 500 V, leads to housing | ≥100 MΩ |
| Surge | L–N 1 kV; N–PE, L–PE 2 kV; ±; 5 times each | No malfunction or damage |
| Fast transient (EFT) | 1 kV, direct power-line injection, ±, 0–360° | No malfunction or damage |
| ESD | Contact 4 kV, air 8 kV, ± 10 times each | No malfunction or damage |
Reliability Tests
| Test | Condition |
|---|---|
| Thermal shock | 120 °C 2 h ↔ −10 °C 2 h, 5 cycles, unpowered |
| High-temperature storage | 105 °C, 96 h, unpowered |
| Low-temperature storage | −20 °C, 96 h, unpowered |
| Damp heat | 85 °C / 85% RH, 96 h, unpowered |
| Humidity cycling | −10 °C 2 h, then 40 °C / 85–95% RH 5 h, unpowered |
| Locked rotor | No smoke, no fire, no exposed live parts |
| Endurance run | 10,000 h powered, room temperature and humidity |
Construction & Materials
| Part | Material |
|---|---|
| Shaft | 45# carbon steel |
| Front / rear end cover | SPCC, electrophoretic coating |
| Rotor / stator core | Silicon steel |
| Magnets | Ferrite × 8 |
| Winding | Enamelled copper wire |
| End insulation | PA66, flame-retardant |
| Bearings | 6202ZZ × 2 |
| Power leads | RV-90 0.75 mm², brown / yellow / blue |
| Ground lead | UL1015 18 AWG, yellow/green, Φ5.3 ground rings |
| Connector | PA66 housing, phosphor-bronze terminals |
The motor complies with GB/T 5171 (general specification for small power motors) and GB 12350 (safety requirements for small power motors). Rated motor voltage is DC 310 V, supplied by the control board from 220 VAC.
Operating Conditions
- Operating: −10 to +50 °C, ≤95% RH, no condensation
- Storage: −20 to +60 °C, ≤95% RH, no condensation
- Not for use or storage in corrosive gas, flammable gas, or dusty environments
- Not for use under vibration that affects motor performance
Installation & Safety
- Do not carry the motor by its leads or shaft.
- Seat connectors fully and wire correctly; poor contact can overheat and cause fire.
- Do not damage the leads during installation and wiring.
- Operate only at rated voltage; do not touch rotating parts while powered.
- Do not disassemble, repair, or modify the motor.
Product Design Drawings
| Parameter | Value |
|---|---|
| Model | STD250-FF1 |
| Motor Type | 3-Phase Brushless DC, Sensorless |
| Slots / Poles | 12 Slots / 8 Poles |
| Rated Voltage | AC 220 V (control board input) |
| Voltage Range | 175–265 VAC (control board input) |
| Drive | 3-Phase 180° Sinusoidal |
| Speed Control | 0–5 V DC |
| Speed Feedback | FG Signal |
| Rotation | Clockwise (viewed from shaft end) |
| Insulation Class | B |
| Line Resistance | 18.6 Ω ±8% (20 °C) |
| Line Inductance | 120 mH ±8% |
| No-Load Power / Current / Speed | 17 W / 0.16 A / 2000 rpm |
| Load Power / Current / Speed | 100 W / 0.84 A / 930 rpm |
| Test Load | Senter control board + Ø470 mm matched impeller |
| Winding Temperature Rise | ≤78 K |
| Noise | ≤45 dB (no load) |
| Vibration | ≤1.6 mm/s (no load) |
| Bearings | 6202ZZ × 2 |
| Power Leads | RV-90 0.75 mm², brown / yellow / blue |
| Operating Environment | −10 to +50 °C, ≤95% RH |
| Storage Environment | −20 to +60 °C, ≤95% RH |
| Endurance Run Test | 10,000 h |
| Flange / Mounting Hole Circle | Ø151 mm / Ø140 ±0.3 mm |
| Body Diameter × Length | Ø123 × 88 mm |
| Shaft | Ø14 mm with flat, 30 ±0.5 mm extension |
| Lead Length | 950 ±20 mm |
| Standards | GB/T 5171, GB 12350 |
| Supply Options | Motor / Control Board / Motor + Ø470 mm Impeller + Control Board Set |
Product Description
STD250-FF1 is a 3-phase brushless DC motor designed and manufactured by Senter Motor for FFU (fan filter unit) and clean-air fan applications. It uses 180° sinusoidal drive with sensorless (Hall-free) position detection, accepts 175–265 VAC at the control board input, and is speed-controlled by a 0–5 V DC signal with FG speed feedback.
Tested with the Senter control board and its matched Ø470 mm impeller, the motor draws 100 W at 930 rpm under load, with no-load noise of ≤45 dB and vibration of ≤1.6 mm/s.
Supply Options
| Option | Includes |
|---|---|
| Motor only | STD250-FF1 motor |
| Control board only | Senter control board (driver) |
| Complete set | Motor + Ø470 mm matched impeller + control board |
The impeller is supplied only as part of the complete set. Motor, impeller, and control board are matched; the rated performance on this page is measured with that combination.
Product Features
- 3-phase BLDC, 12 slots / 8 poles, 180° sinusoidal drive
- Sensorless (no Hall) position detection
- 0–5 V DC speed control with FG speed feedback
- Wide input range 175–265 VAC (rated 220 VAC)
- Class B insulation, PA66 flame-retardant end insulation
- 6202ZZ double-shielded bearings
- Clockwise rotation viewed from shaft end
Performance
Measured with the Senter control board and the Ø470 mm matched impeller at 10–35 °C, 30–90% RH, shaft horizontal. Values are for reference.
| Item | No Load | Load |
|---|---|---|
| Input power | 17 W ±8% | 100 W ±8% |
| Current | 0.16 A ±8% | 0.84 A ±8% |
| Speed | 2000 ±30 rpm | 930 ±30 rpm |
- Winding temperature rise: ≤78 K (load)
- Noise: ≤45 dB, no abnormal sound (no load)
- Vibration: ≤1.6 mm/s (no load)
Dimensions
| Item | Value |
|---|---|
| Flange diameter | Ø151 mm |
| Mounting hole circle | Ø140 ±0.3 mm |
| Motor body diameter | Ø123 mm |
| Motor body length | 88 mm |
| Shaft end to flange | 94.5 ±2 mm |
| Shaft | Ø14 mm (−0.02/−0.04), flat 13 mm (0/−0.2), flat length 20 ±0.5 mm |
| Shaft extension | 30 ±0.5 mm |
| Lead length | 950 ±20 mm (to connector 1050 ±30 mm) |
See the outline drawing in the gallery for full dimensions.
Starting Performance
- Room temperature: after 4 h at 25 ±3 °C with the specified load, starts at 65% of rated voltage or lower.
- Low temperature: after 4 h at −10 ±3 °C with the specified load, starts at 75% of rated voltage or lower.
Insulation & EMC Immunity
| Test | Condition | Requirement |
|---|---|---|
| Dielectric strength | AC 1500 V, 50/60 Hz, 1 min, leads to housing (production: AC 1800 V, 1 s) | No damage, leakage ≤5 mA |
| Insulation resistance | DC 500 V, leads to housing | ≥100 MΩ |
| Surge | L–N 1 kV; N–PE, L–PE 2 kV; ±; 5 times each | No malfunction or damage |
| Fast transient (EFT) | 1 kV, direct power-line injection, ±, 0–360° | No malfunction or damage |
| ESD | Contact 4 kV, air 8 kV, ± 10 times each | No malfunction or damage |
Reliability Tests
| Test | Condition |
|---|---|
| Thermal shock | 120 °C 2 h ↔ −10 °C 2 h, 5 cycles, unpowered |
| High-temperature storage | 105 °C, 96 h, unpowered |
| Low-temperature storage | −20 °C, 96 h, unpowered |
| Damp heat | 85 °C / 85% RH, 96 h, unpowered |
| Humidity cycling | −10 °C 2 h, then 40 °C / 85–95% RH 5 h, unpowered |
| Locked rotor | No smoke, no fire, no exposed live parts |
| Endurance run | 10,000 h powered, room temperature and humidity |
Construction & Materials
| Part | Material |
|---|---|
| Shaft | 45# carbon steel |
| Front / rear end cover | SPCC, electrophoretic coating |
| Rotor / stator core | Silicon steel |
| Magnets | Ferrite × 8 |
| Winding | Enamelled copper wire |
| End insulation | PA66, flame-retardant |
| Bearings | 6202ZZ × 2 |
| Power leads | RV-90 0.75 mm², brown / yellow / blue |
| Ground lead | UL1015 18 AWG, yellow/green, Φ5.3 ground rings |
| Connector | PA66 housing, phosphor-bronze terminals |
The motor complies with GB/T 5171 (general specification for small power motors) and GB 12350 (safety requirements for small power motors). Rated motor voltage is DC 310 V, supplied by the control board from 220 VAC.
Operating Conditions
- Operating: −10 to +50 °C, ≤95% RH, no condensation
- Storage: −20 to +60 °C, ≤95% RH, no condensation
- Not for use or storage in corrosive gas, flammable gas, or dusty environments
- Not for use under vibration that affects motor performance
Installation & Safety
- Do not carry the motor by its leads or shaft.
- Seat connectors fully and wire correctly; poor contact can overheat and cause fire.
- Do not damage the leads during installation and wiring.
- Operate only at rated voltage; do not touch rotating parts while powered.
- Do not disassemble, repair, or modify the motor.
Product Design Drawings
| Parameter | Value |
|---|---|
| Model | STD250-FF1 |
| Motor Type | 3-Phase Brushless DC, Sensorless |
| Slots / Poles | 12 Slots / 8 Poles |
| Rated Voltage | AC 220 V (control board input) |
| Voltage Range | 175–265 VAC (control board input) |
| Drive | 3-Phase 180° Sinusoidal |
| Speed Control | 0–5 V DC |
| Speed Feedback | FG Signal |
| Rotation | Clockwise (viewed from shaft end) |
| Insulation Class | B |
| Line Resistance | 18.6 Ω ±8% (20 °C) |
| Line Inductance | 120 mH ±8% |
| No-Load Power / Current / Speed | 17 W / 0.16 A / 2000 rpm |
| Load Power / Current / Speed | 100 W / 0.84 A / 930 rpm |
| Test Load | Senter control board + Ø470 mm matched impeller |
| Winding Temperature Rise | ≤78 K |
| Noise | ≤45 dB (no load) |
| Vibration | ≤1.6 mm/s (no load) |
| Bearings | 6202ZZ × 2 |
| Power Leads | RV-90 0.75 mm², brown / yellow / blue |
| Operating Environment | −10 to +50 °C, ≤95% RH |
| Storage Environment | −20 to +60 °C, ≤95% RH |
| Endurance Run Test | 10,000 h |
| Flange / Mounting Hole Circle | Ø151 mm / Ø140 ±0.3 mm |
| Body Diameter × Length | Ø123 × 88 mm |
| Shaft | Ø14 mm with flat, 30 ±0.5 mm extension |
| Lead Length | 950 ±20 mm |
| Standards | GB/T 5171, GB 12350 |
| Supply Options | Motor / Control Board / Motor + Ø470 mm Impeller + Control Board Set |
Frequently Asked Questions
A 3-phase sensorless brushless DC motor from Senter Motor for FFUs and clean-air fans. With the Senter control board and its matched Ø470 mm impeller it draws 100 W at 930 rpm.
Yes. You can buy the motor only, the control board only, or a complete set of motor + Ø470 mm impeller + control board. The impeller is supplied only in the complete set, because motor, impeller, and control board are matched.
Flange Ø151 mm with a Ø140 ±0.3 mm mounting hole circle, body Ø123 × 88 mm, shaft Ø14 mm with a flat and 30 mm extension.
By a 0–5 V DC signal to the control board, with an FG signal for speed feedback. Control board input is 175–265 VAC (rated 220 VAC).
Dielectric strength AC 1500 V / 1 min, insulation resistance ≥100 MΩ, surge 1 kV L–N / 2 kV to PE, EFT 1 kV, ESD 4 kV contact / 8 kV air, thermal shock, damp heat 85 °C / 85% RH, locked rotor, and a 10,000 h endurance run.
STD250-FF1 is tested with a Ø470 mm impeller: 100 W, 930 rpm, 6202ZZ bearings, clockwise. STD150-FF1 is tested with a Ø400 mm impeller: 115 W, 1140 rpm, 6201ZZ bearings, counter-clockwise.