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
What are the key features of ERJP03J3R9V?
- 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
What is ERJP03J3R9V used for?
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.
What are the specifications of ERJP03J3R9V?
| 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 |
Where can I find the ERJP03J3R9V datasheet?
ERJP03J3R9V Datasheet DownloadOfficial datasheet from Panasonic
What are equivalent replacements for ERJP03J3R9V?
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.
Related Guides
How to Choose an LMG1020YFFR GaN Gate Driver: Selection and Sourcing Guide
Compare LMG1020 and LMG1210 circuit roles, gate-drive requirements, ordering codes, and sourcing evidence before approving a GaN driver.
Nov 4, 2026
150141YS73100 LED Selection and Procurement Guide
Evaluate 150141YS73100 and four related LEDs using optical, electrical, mechanical, and sourcing checks before production approval.
Nov 4, 2026
LMG1020YFFR Gate-Driver Board Design and Validation Guide
Design an LMG1020YFFR gate-driver board with controlled gate loops, local power delivery, probing, and staged validation.
Nov 3, 2026
How to Choose a Thyristor Surge Protector: TISP4015L1BJR-S Selection Guide
Compare three Bourns TISP candidates by protection window, package, documentation, and procurement requirements before requesting an exact-part quote.
Nov 3, 2026
Why Buy from FindMyChip
About Panasonic
Panasonic is a leading electronic component manufacturer. FindMyChip sources Panasonic ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| 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 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”
You May Also Like
NC20J00682JBA
AVX
Resistor
PR02000201001JR500
Vishay
Resistor
CRCW060322K6FKEA
Vishay
Resistor
MC01W0805122K6
MULTICOMP
Resistor
MC0125W1206130K1
MULTICOMP
Resistor
CPF0603B22K6E1
TE Connectivity
Resistor
CRCW1206133RFKEAHP
Vishay
Resistor
MC1206S4F1330T5E
MULTICOMP
Resistor
MC0125W12061133R
MULTICOMP
Resistor
CRCW1206133RFKEB
Vishay
Resistor
CRCW1206133RFKEA
Vishay
Resistor
CRCW0805133RFKEAHP
Vishay
Resistor
RC0805FR-1010KL
YAGEO (PHYCOMP)
Resistor
CRCW0805270RJNEA
Vishay
Resistor
CRCW080512K0JNEA
Vishay
Resistor
CRCW08051K80JNEA
Vishay
Resistor
RN73C2A2K21BTDF
TE Connectivity
Resistor
RN73C2A100RBTDF
TE Connectivity
Resistor
RN73C2A30K1BTDF
TE Connectivity
Resistor
RL0402FR-070R05L
YAGEO (PHYCOMP)
Resistor
RC0805JR-0712KL
YAGEO (PHYCOMP)
Resistor
PCF0805R-2K43BI
WELWYN
Resistor
PCF0805-R-2K49BT1
WELWYN
Resistor
CF12JT360R
Stackpole Electronics Inc.
Resistor