ERJT14J121U Panasonic Resistor (Other) In Stock
Panasonic ERJT14 anti-pulse thick film SMD resistor in 1210 case with 120Ω resistance, ±5% tolerance, and 0.5W power rating. Features ±200ppm/°C TCR and RoHS-compliant Pb-free construction for surge-exposed designs. From $0.05 in stock with worldwide shipping.
- Manufacturer
- Panasonic
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- ERJT14J121U Datasheet PDF
- Category
- Resistor
- Price
- From $0.0374(MOQ 5000)
- 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 ERJT14J121U?
- Anti-pulse construction tolerates repetitive surge loads well above rated 0.5W without drift
- 1210 case (3.2 mm × 1.6 mm × 0.6 mm) with low 0.6 mm profile for compact SMT layouts
- 120Ω ±5% value ideal for LED current limiting and gate-drive snubber networks
- ±200ppm/°C TCR maintains stable resistance from -55°C to +155°C
- RoHS-compliant Pb-free termination per JESD-609 e3 code for green manufacturing
What is ERJT14J121U used for?
The ERJT14J121U is frequently used as a current-limiting resistor in LED indicator strings and LCD backlight circuits, where the 120Ω value and 0.5W rating provide controlled forward current from 5V to 12V supply rails. Its anti-pulse characteristic also makes it suitable for snubber and gate-drive damping networks in MOSFET and IGBT switching stages. Industrial automation boards and automotive body-control modules rely on this part for reliable pull-up, pull-down, and bias functions across extended temperature ranges.
What are the specifications of ERJT14J121U?
| 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 | 120Ω |
| 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 ERJT14J121U datasheet?
ERJT14J121U Datasheet DownloadOfficial datasheet from Panasonic
What are equivalent replacements for ERJT14J121U?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the ERJT14J121U perform as an LED current limiter on a 12V rail compared with a non-anti-pulse resistor?
At 12V driving a red LED with ~2V forward voltage through the 120Ω ERJT14J121U, the steady-state current is approximately 83 mA and the power dissipation is about 0.83W—above the 0.5W DC rating. In pulsed LED applications with a duty cycle below 60%, average dissipation drops below 0.5W and the anti-pulse construction handles peak current spikes without resistance shift that would alter LED brightness over time.
Which automotive body-control circuits typically use the ERJT14J121U's 120Ω, 0.5W anti-pulse rating?
Automotive body-control modules use 120Ω resistors for CAN bus termination resistor networks, relay coil current-limit circuits, and low-side switch pull-down paths operating at 12V to 14.4V battery voltage. The ERJT14J121U's anti-pulse construction tolerates the repetitive inductive load kickback spikes that occur when relay coils are de-energized, where instantaneous power can reach 5× to 10× the rated 0.5W for microsecond durations.
Is ERJT14J121U suitable to replace a standard ERJ-14YJ121U in a 1210 footprint without board respinning?
Yes. Both parts share the 1210 package footprint (3.2 mm × 1.6 mm) and the same 120Ω ±5% electrical specification, making the ERJT14J121U a direct pin-compatible upgrade. The anti-pulse ERJT14 series adds surge robustness at a slightly higher unit cost, but no PCB re-layout or new qualification testing is needed when upgrading an existing 1210 land pattern design.
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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 |
|---|---|---|
| 5000+ | $0.0401 | $200.50 |
| 10000+ | $0.0386 | $386.00 |
| 25000+ | $0.0374 | $935.00 |
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