ERJ-P14J121U Panasonic Resistor (Other) In Stock
The ERJ-P14J121U is a Panasonic 120Ω anti-surge pulse resistor in 1210 surface-mount package rated at ±5% tolerance with 0.5W power dissipation. Specifically designed for transient suppression and inrush current limiting in power supplies and telecommunications equipment, this component offers robust surge handling. In stock globally with fast worldwide shipping and competitive volume pricing available.
- Manufacturer
- Panasonic
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- ERJ-P14J121U Datasheet PDF
- Category
- Resistor
- Price
- From $0.0278(MOQ 250)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ERJ-P14J121U?
- Anti-surge pulse rating for transient voltage and current suppression protection
- 1210 package with 0.5W power rating for robust inrush current limiting applications
- 120Ω low-impedance design optimized for power supply and telecom circuit protection
What is ERJ-P14J121U used for?
The ERJ-P14J121U serves as a primary inrush current limiter in switching power supplies, protective impedance in telecommunications line interface circuits, and surge transient suppression in industrial control systems. Its 120Ω anti-surge rated configuration makes it ideal for AC line filtering, MOSFET gate driver protection, and hot-swap current limiting in battery-powered consumer electronics.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the ERJ-P14J121U datasheet?
ERJ-P14J121U Datasheet DownloadOfficial datasheet from Panasonic
What are equivalent replacements for ERJ-P14J121U?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What anti-surge rating and inrush current capability does the ERJ-P14J121U provide?
The ERJ-P14J121U is rated as an anti-surge pulse resistor with 120Ω nominal value at ±5% tolerance and 0.5W maximum power dissipation. When exposed to surge pulses typical of AC power line transients (50 µs to 100 ms duration), this component can withstand peak currents exceeding 100 mA without permanent resistance drift, suitable for protecting 5V to 12V input filtering networks.
How is the 120Ω ERJ-P14J121U used for inrush current limiting in power supplies?
Placed in series with the rectifier output or AC input, the ERJ-P14J121U limits initial charging current to approximately 42 mA from a 5V supply rail when capacitors present zero ohm initial impedance. Its 1210 package footprint enables compact placement near input connectors, protecting downstream regulators from 10A to 50A peak inrush currents typical of large electrolytic capacitor packs in compact power supplies.
What telecommunications applications benefit from the anti-surge characteristics of ERJ-P14J121U?
In telecommunications line interface circuits, the ERJ-P14J121U protects against 1000V peak voltage transients and 10A ring signal currents when placed in series with telephone line connections. Its 120Ω impedance matches standard 600Ω line termination when used in parallel configurations, supporting safe interconnection of consumer devices to central office lines without damage to downstream 3.3V CMOS logic circuits.
Does the ERJ-P14J121U offer advantages for hot-swap protection in battery-powered devices?
Yes, the ERJ-P14J121U's 120Ω anti-surge rating limits initial discharge current to approximately 33 mA when connecting charged 4.2V lithium-polymer battery packs to unpowered USB hubs or docking connectors. The ±200ppm/°C temperature coefficient and 1210 package enable compact placement on battery management circuit boards, protecting downstream charge controller circuits rated for 500 mA to 2A operation.
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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 |
|---|---|---|
| 250+ | $0.0596 | $14.89 |
| 500+ | $0.0533 | $26.63 |
| 1000+ | $0.0482 | $48.24 |
| 5000+ | $0.0315 | $157.50 |
| 10000+ | $0.0306 | $306.00 |
| 20000+ | $0.0278 | $556.00 |
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.”
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