ERJT14J391U Panasonic Resistor (Other) In Stock
Panasonic ERJT14J391U is a 1210 anti-pulse thick film surface mount resistor with 390Ω resistance, ±5% tolerance, 0.5W power rating, and ±200ppm/°C temperature coefficient. From $0.01 in stock worldwide shipping.
- Manufacturer
- Panasonic
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- ERJT14J391U Datasheet PDF
- Category
- Resistor
- Price
- From $0.1180(MOQ 5)
- 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 ERJT14J391U?
- 390Ω anti-pulse construction for superior short-duration overload tolerance
- 0.5W continuous power rating in robust 1210 (3225 metric) SMT package
- ±200ppm/°C TCR ensuring stable resistance from -55°C to +155°C
- Thick film rectangular design providing high pulse energy absorption capability
- Pb-free and RoHS compliant (JESD-609 e3) for global regulatory compliance
- 3.2mm × 2.5mm × 0.6mm profile balancing power handling with compact board footprint
What is ERJT14J391U used for?
The ERJT14J391U anti-pulse resistor is engineered for circuits subject to repetitive voltage and current spikes, such as motor drive snubbers, relay coil suppression networks, and inductive load discharge paths where momentary overcurrents far exceed steady-state levels. Its enhanced pulse energy absorption makes it preferable over standard thick film resistors in automotive ignition systems, SMPS snubber circuits, and defibrillator-class medical electronics. The 1210 package and 0.5W rating provide the thermal robustness needed for demanding environments operating across the full -40°C to +125°C automotive temperature range.
What are the specifications of ERJT14J391U?
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| Factory Lead Time | 22Weeks |
| YTEOL | 12 |
| Construction | Rectangular |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 0.6mm |
| Package Length | 3.2mm |
| Package Shape | RECTANGULAR PACKAGE |
| Package Style | SMT |
| Package Width | 2.5mm |
| Packing Method | TR, EMBOSSED, 7 INCH |
| Rated Power Dissipation (P) | 0.5W |
| Rated Temperature | 70°C |
| Reference Standard | AEC-Q200, IEC60115-8 |
| Resistance | 390Ω |
| Resistor Type | FIXED RESISTOR |
| Size Code | 1210 |
| Surface Mount | YES |
| Technology | METAL GLAZE/THICK FILM |
| Temperature Coefficient | 200ppm/°C |
| Terminal Finish | TIN |
| Terminal Shape | WRAPAROUND |
| Tolerance | 5% |
| Working Voltage | 200V |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8533.21.00.30 |
| Country of Origin | Japan |
Where can I find the ERJT14J391U datasheet?
ERJT14J391U Datasheet DownloadOfficial datasheet from Panasonic
What are equivalent replacements for ERJT14J391U?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the anti-pulse design of ERJT14J391U differ from a standard thick film 390Ω resistor?
Anti-pulse thick film resistors use a modified resistive element geometry that distributes pulse energy across a larger active area, enabling 5x to 10x higher single-pulse energy absorption compared to standard designs. The ERJT14J391U can absorb short-pulse energy bursts well above its 0.5W continuous rating without cracking or value shift, making it suitable for repetitive transient applications.
What snubber circuit role is the ERJT14J391U best suited for in a DC motor drive?
In a DC motor drive RC snubber, the ERJT14J391U at 390Ω paired with a 10nF capacitor forms a snubber with a time constant of 3.9µs, effectively damping switching transients at frequencies up to 100kHz. Its 0.5W continuous rating and enhanced pulse tolerance prevent resistor degradation from the repetitive inductive flyback pulses generated during motor commutation.
Can the ERJT14J391U replace a wirewound resistor in pulse applications, and what are the trade-offs?
The ERJT14J391U can replace wirewound resistors in many pulse applications, offering advantages of SMT mounting, 0.6mm low profile versus wirewound's typically 5mm to 10mm height, and automated assembly compatibility. However, wirewound resistors at 390Ω can typically handle higher single-pulse energies (10J to 100J range) versus the anti-pulse film type's lower but still significantly enhanced pulse rating.
What LED drive current does a 390Ω ERJT14J391U provide at a 5V supply with a standard LED?
With a 5V supply and a typical green LED forward voltage of 2.1V, the ERJT14J391U at 390Ω limits LED current to approximately 7.4mA ((5V - 2.1V) / 390Ω). This is within the safe operating range for standard indicator LEDs rated at 10mA to 20mA, and represents only 21mW of power — well within the resistor's 0.5W rating.
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About Panasonic
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 5+ | $0.1300 | $0.65 |
| 25+ | $0.1250 | $3.13 |
| 50+ | $0.1180 | $5.90 |
In Stock · 24h Response · Worldwide Shipping
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