Brushless vs Brushed DC Motor: Which One for Your Application?

# Brushless vs Brushed DC Motor: The Engineer's Decision Guide Choosing between a brushed DC motor and a brushless DC motor (BLDC) is one of the most consequential decisions in micro drive design. This guide breaks down the trade-offs. ## The Short Answer | If You... | Choose | |:---|:---| | Need the lowest cost ($2-15 per motor) | **Brushed DC** | | Need the longest life (10K-20K+ hrs) | **BLDC** | | Need near-silent operation (<30dB) | **BLDC (Slotless)** | | Have a simple DC power supply | **Brushed DC** | | Need precise speed/position control | **BLDC + Controller** | | Are building high volume consumer products | **Brushed DC** | | Are building medical or aerospace devices | **BLDC** | ## Detailed Comparison | Dimension | Brushed DC | BLDC | |:---|:---|:---| | Cost (motor only) | $2 – $15 | $12 – $65+ | | Controller Required | No (DC voltage) | Yes (electronic commutation) | | Service Life | 1K – 5K hrs | 10K – 20K+ hrs | | Noise | 50-55 dB | <30 dB (slotless) | | EMI | High (brush arcing) | Low | | Efficiency | 50-70% | 70-90% | | Speed Range | 3K – 15K RPM | 5K – 50K+ RPM | ## Application Recommendations | Application | Recommended | Why | |:---|:---|:---| | Smart Lock | Brushed N20 | Cost-sensitive, intermittent use, simple control | | Medical Ventilator | BLDC BL-24C | 15K+ hrs, <30dB, continuous use | | EV Charging Gun | Brushed N20 Worm | Self-locking, cost-optimized, intermittent | | Drone Gimbal | BLDC | High efficiency, smooth | | Toy/Consumer | Brushed | Lowest cost | [Browse our product catalog →](/products)