ERJP03J3R9V Panasonic Resistor (Resistor Chip) In Stock
Panasonic ERJP03J3R9V is a thick-film chip resistor featuring 3.9 ohm nominal value with ±5% tolerance in a compact 0603 surface-mount package. This component offers 0.2W power dissipation and temperature coefficient range from -150 to +400 ppm/°C, making it suitable for current-sensing applications in power management circuits. Widely available in stock globally with express shipping for rapid integration into high-volume consumer and industrial PCB assembly operations.
- Manufacturer
- Panasonic
- Package
- Resistor Chip
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- ERJP03J3R9V Datasheet PDF
- Category
- Resistor
- Price
- From $0.0390(MOQ 50)
- Temp Range
- -55.0°C to 155.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Low 3.9Ω value optimized for power-supply current sensing with minimal circuit efficiency loss
- 0.2W dissipation handles up to 224 mA continuous current in 12V and 24V power distribution networks
- 0603 footprint (1.6×0.8 mm) provides optimal balance between thermal performance and board density
Applications
The ERJP03J3R9V excels as a precision current-sense resistor in switch-mode power supply feedback networks, a load-balancing component in multi-output converter designs, and a protective element in battery charging circuits monitoring fast-charge currents from 1-2 amperes. Its 3.9Ω value and 0.2W rating make it ideal for 12V automotive power distribution, industrial 24V control modules, and consumer power adapters operating continuously from 0°C to 70°C.
Specifications
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| YTEOL | 12 |
| Construction | Rectangular |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 0.45mm |
| 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) | 0.2W |
| Rated Temperature | 70°C |
| Reference Standard | AEC-Q200, IEC60115-8 |
| Resistance | 3.9Ω |
| Resistor Type | FIXED RESISTOR |
| Size Code | 0603 |
| Surface Mount | YES |
| Technology | METAL GLAZE/THICK FILM |
| Temperature Coefficient | -150,400 ppm/°C |
| Terminal Finish | TIN |
| Terminal Shape | WRAPAROUND |
| Tolerance | 5% |
| Working Voltage | 150V |
| 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, Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What maximum continuous current can the ERJP03J3R9V carry at its 0.2W power rating?
At 0.2W dissipation with 3.9Ω resistance, the ERJP03J3R9V safely handles approximately 224 mA continuous current (calculated from P=I²R: 0.2=I²×3.9), generating a precise 0.87V voltage drop for accurate current monitoring in power supplies. This current capacity suits 12V automotive battery charging applications where a single resistor measures charge currents between 100-200 mA with minimal power loss. The temperature coefficient of -150 to +400 ppm/°C can contribute up to 0.6% value drift over 0°C to 70°C ranges, requiring circuit design margins for critical threshold applications.
How does ERJP03J3R9V compare to ERJP03F3R9V for current-sensing applications?
Both ERJP03J3R9V and ERJP03F3R9V share identical 3.9Ω nominal value and 0.2W power rating, but the J-suffix (±5% tolerance) variant provides cost savings over F-suffix (±1% tolerance) precision grades. For applications tolerating ±5% current-measurement variation (most power supply designs), ERJP03J3R9V costs 10-15% less while maintaining full 224 mA current capacity. Reserve ERJP03F3R9V for battery management systems and solar charge controllers requiring <1% accuracy; standard industrial power supplies and automotive circuits achieve adequate performance at ±5% tolerance and lower cost with the J-variant.
Why choose the 0603 package over smaller 0402 resistors for current-sense applications?
The ERJP03J3R9V's 0603 package (1.6×0.8 mm, area 1.28 mm²) provides 3.5x more copper thermal coupling surface than 0402 (2.0×1.0 mm), enabling superior heat dissipation during 0.2W operation at 224 mA continuous current. In high-current charging circuits where sustained 224 mA may generate 0.18W dissipation causing 2-3°C PCB temperature rise, the 0603 package keeps the resistor cooler, maintaining temperature coefficient accuracy to within ±3% compared to ±8% for undersized 0402 resistors. Most production designs leverage 0603 for current sensing at moderate currents; reserve 0402 for ultra-low impedance paths below 100 mA.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 50+ | $0.0500 | $2.50 |
| 250+ | $0.0420 | $10.50 |
| 500+ | $0.0410 | $20.50 |
| 20000+ | $0.0400 | $800.00 |
| 30000+ | $0.0390 | $1170.00 |
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