ERJ3BWFR030V Panasonic Resistor (Resistor Chip) In Stock
Panasonic ERJ3BWFR030V is a 0.03 Ω, high-precision surface-mount chip resistor in a 0603 (1.6 mm x 0.8 mm) package rated for accurate current sensing. Features tight tolerance and high power handling for demanding analog and power management circuits. Available from stock worldwide.
- Manufacturer
- Panasonic
- Package
- Resistor Chip
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- ERJ3BWFR030V 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
- 0.03 Ω (30 mΩ) resistance value with high-precision tolerance for accurate current sensing in power management circuits
- 0603 package (1.6 mm x 0.8 mm x 0.55 mm) combines compact SMT footprint with robust power handling
- Panasonic ERJ3BW series construction provides stable resistance across temperature extremes for reliable current measurement
Applications
The ERJ3BWFR030V is designed for current sensing and shunt resistor applications in battery management systems, motor control circuits, and DC-DC converters where low-resistance, high-precision measurement is critical. Its 30 mΩ value minimizes power loss in the sense path while providing sufficient voltage drop for accurate current measurement with standard sense amplifiers. The 0603 SMT package allows placement close to the load in compact power electronic designs.
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 | 0.03Ω |
| 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 | 0.0995V |
| 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
What resistance value does ERJ3BWFR030V provide, and how does it minimize power loss in current sensing applications?
The ERJ3BWFR030V has a resistance of 0.03 Ω (30 mΩ). At 1 A of load current, the sense resistor dissipates only 0.9 mW of power (P = I² × R = 1² × 0.03), minimizing losses in the current path. This low resistance value is ideal for high-current sensing applications in battery management and DC-DC converter circuits where efficiency is critical.
What package size does ERJ3BWFR030V use and what SMT assembly considerations apply to this component?
The ERJ3BWFR030V uses a 0603 chip package measuring 1.6 mm x 0.8 mm x 0.55 mm (Package Length x Width x Height). This size is handled by standard 0603-compatible SMT pick-and-place feeders and reflow soldering profiles. Designers should use appropriately sized PCB pads per IPC-7351 standard for 0603 resistors to ensure reliable solder joints.
How does the high-precision characteristic of ERJ3BWFR030V benefit battery management system designs?
In battery management systems (BMS), an accurate 0.03 Ω shunt resistor like the ERJ3BWFR030V allows coulomb-counting ICs to measure charge and discharge current with minimal error. Tight resistance tolerance ensures that the voltage drop across the shunt at rated current, for example 30 mV at 1 A, is predictable enough for the sense amplifier to calculate state-of-charge accurately across temperature, extending battery cycle life and safety.
How does ERJ3BWFR030V compare to a 0.05 Ω sense resistor when selecting shunt values for a motor drive current loop?
Choosing ERJ3BWFR030V at 0.03 Ω instead of a 0.05 Ω shunt reduces power dissipation by 40% at the same current, since P = I² × R. For a 5 A motor drive, 0.03 Ω dissipates 0.75 W while 0.05 Ω dissipates 1.25 W. The tradeoff is a lower sense voltage (150 mV vs. 250 mV at 5 A), requiring a higher-gain sense amplifier but yielding better thermal performance in compact motor control PCBs.
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