ERJ3BWFR033V Panasonic Resistor (Resistor Chip) In Stock
ERJ3BWFR033V is a 0603 thick film fixed resistor by Panasonic with 33 mΩ resistance and ±1% tolerance rated at 0.25 W. Key specs: ±250 ppm/°C temperature coefficient, 1.6 mm x 0.8 mm SMD package, high-precision current sensing. From $0.10, in stock with worldwide shipping.
- Manufacturer
- Panasonic
- Package
- Resistor Chip
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- ERJ3BWFR033V Datasheet PDF
- Category
- Resistor
- Temp Range
- -55.0°C to 155.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-low 33 mΩ resistance with ±1% tolerance enables high-precision current sensing in 0603 SMD package
- 0.25 W power rating in compact 1.6 mm x 0.8 mm footprint delivers high power density for space-constrained current shunt applications
- ±250 ppm/°C temperature coefficient ensures stable resistance across operating temperature range for accurate current measurement in automotive and industrial designs
Applications
The ERJ3BWFR033V is primarily used as a current sense shunt resistor in battery management systems, motor controllers, and power monitors where precise low-resistance measurements are needed. Its 33 mΩ value produces measurable voltage drops at currents above 100 mA without excessive power dissipation, making it ideal for over-current protection and coulomb counting circuits. The 0603 footprint integrates easily into compact PCB designs for portable devices and automotive electronics requiring accurate current feedback.
Specifications
| Reach Compliance Code | Compliant |
| Factory Lead Time | 18Weeks |
| YTEOL | 12 |
| Additional Feature | HIGH PRECISION |
| Construction | Rectangular |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 0.55mm |
| Package Length | 1.6mm |
| Package Shape | RECTANGULAR PACKAGE |
| Package Style | SMT |
| Package Width | 0.8mm |
| Packing Method | TR, PUNCHED, 7 INCH |
| Rated Power Dissipation (P) | 0.33W |
| Rated Temperature | 70°C |
| Reference Standard | AEC-Q200, IEC60115-8 |
| Resistance | 0.033Ω |
| Resistor Type | FIXED RESISTOR |
| Size Code | 0603 |
| Surface Mount | YES |
| Technology | METAL GLAZE/THICK FILM |
| Temperature Coefficient | 0,250 ppm/°C |
| Terminal Finish | TIN |
| Terminal Shape | WRAPAROUND |
| Tolerance | 1% |
| Working Voltage | 0.1044V |
| Package | Resistor Chip |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8533.21.00.30 |
| Country of Origin | Japan |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
At what current level does the ERJ3BWFR033V reach its 0.25 W power rating limit?
The ERJ3BWFR033V with 33 mΩ resistance reaches its 0.25 W power limit at approximately 2.75 A, calculated from P = I² × R (0.25 = I² × 0.033). For battery management systems and power monitors, operating below 2.5 A ensures a safe thermal margin, while the resulting 82.5 mV voltage drop at that current is easily measured by common 16-bit ADCs.
How does the ±1% tolerance and ±250 ppm/°C temperature coefficient of ERJ3BWFR033V affect current measurement accuracy in a -40°C to +85°C industrial environment?
With a ±250 ppm/°C temperature coefficient, the 33 mΩ resistance of ERJ3BWFR033V shifts by up to ±3125 ppm (±0.31%) across a -40°C to +85°C range (125°C span). Combined with the ±1% initial tolerance, worst-case total error is approximately ±1.31%, which is acceptable for battery state-of-charge monitoring but may require calibration compensation in precision metering requiring sub-0.5% accuracy.
Can ERJ3BWFR033V replace a 0.05 Ω current sense resistor for lower power loss in a 1 A motor drive circuit?
Yes, replacing a 0.05 Ω (50 mΩ) resistor with ERJ3BWFR033V (33 mΩ) reduces power dissipation at 1 A from 50 mW to 33 mW—a 34% reduction. The trade-off is a smaller sense voltage of 33 mV versus 50 mV at 1 A, so the amplifier gain on the current sense signal would need to be increased by approximately 1.5× to maintain the same ADC input range.
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