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Home > Products > Resistors > Chip Resistor - Surface Mount > PU3921FKN130U4L
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PU3921FKN130U4L

In Stock 35137 pcs Reference Price(In US Dollars)
1+
$1.4469
200+
$0.5776
500+
$0.5594
1000+
$0.5496
Manufacturer Part Number:
PU3921FKN130U4L
Manufacturer / Brand
YAGEO
Part of Description:
RES 400 UOHM 1% 3W
Datasheets:
PU3921FKN130U4L.pdf
Lead Free Status / RoHS Status:
RoHS Compliant
Stock Condition:
New original, 35137 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number PU3921FKN130U4L
Manufacturer / Brand YAGEO
Stock Quantity 35137 pcs Stock
Category Resistors > Chip Resistor - Surface Mount
Description RES 400 UOHM 1% 3W
Lead Free Status / RoHS Status: RoHS Compliant
Tolerance ±1%
Temperature Coefficient ±175ppm/°C
Supplier Device Package -
Size / Dimension 0.394" L x 0.205" W (10.00mm x 5.20mm)
Series PU
Resistance 400 µOhms
Ratings AEC-Q200
Power (Watts) 3W
Package / Case Nonstandard
Package Tape & Reel (TR)
Operating Temperature -65°C ~ 170°C
Number of Terminations 2
Height - Seated (Max) 0.025" (0.63mm)
Features Automotive AEC-Q200, Moisture Resistant
Failure Rate -
Composition Metal Element

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



We accept the payment terms: Telegraphic Transfer(T/T), Credit Card, PayPal and Western Union.

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PayPal Bank Information:
Company Name : IC COMPONENTS LTD
Paypal ID: Info@IC-Components.com

BANK TRANSFAR (Telegraphic Transfer)

Payment For Telegraphic Transfers:
Company Name : IC COMPONENTS LTD Beneficiary Account Number : 549-100669-701
Beneficiary Bank name : Bank of Communications (Hong Kong) Ltd Beneficiary Bank Code : 382 (for local payment)
Beneficiary Bank SWIFT : COMMHKHK
Beneficiary Bank Address : Tsuen Wan Market Street Branch 53 Market Street, Tsuen Wan N.T., Hong Kong

Any inquires or questions, please kindly contact us Email: Info@IC-Components.com


Frequently Asked Questions

How should I route the PCB around PU3921FKN130U4L to get accurate current sensing?
PU3921FKN130U4L is a 2-terminal 400 uOhm shunt, so the layout around the pads usually matters more than the part itself. Keep the current path short and wide, place the sense amplifier pickup points as close to the resistor terminals as possible, and avoid sharing copper with noisy load-current return paths. If the design uses remote sensing, route the Kelvin traces as a matched pair and keep them away from switching nodes so the small sensed voltage is not corrupted by IR drop or inductive pickup.
Is PU3921FKN130U4L suitable for automotive battery, inverter, or ECU current measurement?
PU3921FKN130U4L carries AEC-Q200: and moisture-resistant features, so it fits many automotive-style passive component requirements, but the full system still needs validation for solder joint integrity, thermal cycling, vibration, and the actual current waveform. In battery and inverter designs, confirm that board copper can remove heat effectively and that the sensing amplifier can resolve the very small voltage developed across 400 uOhm over the expected current range.
Can PU3921FKN130U4L handle pulsed or surge current, or is it only for steady-state use?
PU3921FKN130U4L is rated at 3 W, which gives a useful steady-state starting point, but pulse capability depends on waveform, duty cycle, copper area, and ambient temperature. A short surge may be acceptable if the average heating remains controlled, yet repeated pulses can raise the element temperature and shift the measured value. For designs with motor starts, inrush, or battery fault events, verify the transient thermal behavior on the actual PCB rather than relying only on the nominal power rating.
What voltage-drop and signal-chain issues should I check when using PU3921FKN130U4L with an ADC or current-sense amplifier?
PU3921FKN130U4L develops only a very small sense voltage, so the amplifier offset, input common-mode range, and PCB noise can dominate the measurement error. For example, 1 A produces about 0.4 mV across 400 uOhm, so even a modest offset or trace drop can be significant at low currents. In practice, choose an amplifier whose input offset and common-mode behavior fit the measurement topology, and calibrate the system if you need good accuracy near the low end of the range.
Can PU3921FKN130U4L replace another 400 uOhm current-sense resistor as a drop-in part?
PU3921FKN130U4L should not be treated as a drop-in replacement unless the footprint, pad spacing, height, power dissipation, temperature coefficient, and mounting method all line up. Even if another part is also 400 uOhm, differences in package outline, resistance tolerance, and thermal mass can change both measurement accuracy and heating. When migrating from another YAGEO, Vishay, Isabellenhutte, or Panasonic current-sense resistor family, compare the land pattern and current derating curve first, then verify the electrical offset in the target circuit.
Is PU3921FKN130U4L better for high-side or low-side current sensing?
PU3921FKN130U4L can be used in either topology because it is a passive 2-terminal shunt, but the supporting electronics differ. Low-side sensing is usually simpler because the amplifier sees a ground-referenced signal, while high-side sensing requires an amplifier with the right common-mode range and rejection of switching noise. If the load is in a noisy power stage, high-side placement can preserve ground integrity, but only if the front end is designed for that common-mode voltage.
How does temperature drift affect PU3921FKN130U4L in industrial or long-life equipment?
PU3921FKN130U4L has a temperature coefficient of +/-175 ppm/C, so the resistance will move with ambient temperature and self-heating. Over a wide operating range, that drift can become visible in current measurement, especially at higher currents where the resistor heats itself. For industrial systems, it helps to model the shunt temperature, use copper for heat spreading, and apply calibration or firmware compensation if measurement repeatability matters across temperature.
Is PU3921FKN130U4L a good choice for humid, mechanically stressed, or long-storage environments?
PU3921FKN130U4L includes moisture-resistant construction and an MSL 1 classification, which simplifies handling and storage compared with moisture-sensitive parts. For field reliability, the remaining risks usually come from solder joint fatigue, board flex, and localized heating rather than moisture absorption alone. In vibration-prone assemblies, keep the resistor close to mechanical support and avoid board cutouts or heavy connectors that can concentrate stress near the termination pads.

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PU3921FKN130U4L

YAGEO

RES 400 UOHM 1% 3W

In Stock: 35137

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