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HomeProductsInductors, Coils, ChokesFixed Inductors0805CS-182EJFS
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0805CS-182EJFS - Delta Electronics/Components

Manufacturer Part Number
0805CS-182EJFS
Manufacturer
Cyntec / Delta Electronics
Allelco Part Number
32D-0805CS-182EJFS
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
286,020 pcs available, New & Original
Parts Description
FIXED IND 1.8UH 350MA 900MOHM SM
Package
0805
Data sheet
0805CS-182EJFS.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 286020
  • Unit Price: $0.149
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $0.149 $0.15
200+ $0.06 $12.00
500+ $0.058 $29.00
1000+ $0.057 $57.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

0805CS-182EJFS Tech Specifications
Delta Electronics/Components - 0805CS-182EJFS technical specifications, attributes, parameters and parts with similar specifications to Delta Electronics/Components - 0805CS-182EJFS

Product Attribute Attribute Value
Manufacturer Cyntec / Delta Electronics
Type Drum Core, Wirewound
Tolerance ±5%
Supplier Device Package 0805
Size / Dimension 0.090" L x 0.067" W (2.29mm x 1.71mm)
Shielding Unshielded
Series 0805CS
Ratings -
Q @ Freq 15 @ 7.96MHz
Package / Case 0805 (2012 Metric)
Package Tape & Reel (TR)
Operating Temperature -40°C ~ 85°C
Product Attribute Attribute Value
Mounting Type Surface Mount
Material - Core Ferrite
Inductance Frequency - Test 7.96 MHz
Inductance 1.8 µH
Height - Seated (Max) 0.057" (1.45mm)
Frequency - Self Resonant 120MHz
Features -
DC Resistance (DCR) 900mOhm
Current Rating (Amps) 350 mA
Current - Saturation (Isat) -
Base Product Number 0805CS

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8504.50.4000

Frequently Asked Questions(FAQ)

What are the practical current handling limits for the 0805CS-182EJFS inductor in switching power supply applications?
The 0805CS-182EJFS is rated for a maximum continuous current of 350 mA, which represents the thermal limit under standard operating conditions within the -40°C to 85°C range. The 900mOhm DC resistance means I²R losses of approximately 110 mW at full rated current. In boost or buck converter topologies, this 350 mA ceiling should be observed during the worst-case duty cycle scenario; exceeding this rating causes core saturation effects and accelerated thermal runaway. For applications requiring higher current handling with the same 1.8 µH inductance value, a larger case size or lower DCR variant must be substituted, as the compact 0805 (2.29mm × 1.71mm) footprint of the 0805CS-182EJFS inherently constrains thermal dissipation.
How does the 900mOhm resistance of the 0805CS-182EJFS affect efficiency in DC-DC converter designs?
The 900mOhm series resistance of the 0805CS-182EJFS introduces a voltage drop proportional to ripple current: at 200 mA ripple, this becomes roughly 180 mV, reducing converter efficiency by 1–3% depending on input voltage and switching frequency. In 3.3V or 5V input designs, this parasitic resistance becomes a dominant loss mechanism, particularly in low-dropout scenarios. The 0805CS-182EJFS DCR can be partially mitigated through converter topology selection—current-mode PWM controllers inherently compensate for DCR effects, whereas voltage-mode designs experience additional feedback loop stability challenges. For high-efficiency battery-powered applications under 10 mA average current, the 900mOhm DCR remains acceptable; however, sustained currents above 200 mA demand thermal analysis to prevent the core temperature rise that triggers inductor saturation in the 0805CS-182EJFS.
Can the 0805CS-182EJFS be used as a common-mode choke in EMI filtering applications?
The 0805CS-182EJFS is optimized as a single-ended inductor and is unsuitable for common-mode choke applications. Common-mode chokes require dual-winding construction with magnetic coupling coefficients near 1.0 and specific winding geometry; the 0805CS-182EJFS unshielded drum core design does not meet these specifications. Additionally, the 120 MHz self-resonant frequency and relatively low Q of 15 @ 7.96 MHz indicate that the 0805CS-182EJFS exhibits reduced impedance in the 10–100 MHz EMI band where common-mode filtering is most effective. For common-mode suppression in high-speed data lines or power distribution networks, a ferrite common-mode choke rated for the required impedance (typically 100–600 Ohms @ 100 MHz) should replace the 0805CS-182EJFS.
What is the frequency response behavior of the 0805CS-182EJFS, and how does it differ from shielded inductors?
The 0805CS-182EJFS exhibits a 1.8 µH inductance measured at 7.96 MHz with a Q factor of 15 at that frequency. The unshielded topology means external magnetic field coupling occurs, introducing potential crosstalk and susceptibility to external magnetic interference—particularly problematic when placed near switching nodes or other high-current traces. The 120 MHz self-resonant frequency indicates that above approximately 100 MHz, the 0805CS-182EJFS transitions from inductive to capacitive behavior due to inter-winding parasitic capacitance. Shielded inductors typically exhibit lower Q values and higher DCR but suppress radiated emissions and external coupling. For applications below 50 MHz where board space and cost are primary constraints, the unshielded 0805CS-182EJFS is acceptable; above 50 MHz or in sensitive analog circuits, shielded alternatives with similar inductance values should be evaluated despite the larger footprint penalty.
How does the ±5% inductance tolerance of the 0805CS-182EJFS impact loop stability in feedback control systems?
The ±5% tolerance specification for the 0805CS-182EJFS means actual inductance may range from 1.71 µH to 1.89 µH across the production batch and temperature range. In LC tank circuits or feedback networks, this tolerance directly shifts the resonant frequency by approximately ±2.5%, potentially causing phase margin degradation in compensated feedback loops. For voltage-mode buck converters using the 0805CS-182EJFS, a ±5% inductance variation shifts the output filter pole frequency, requiring compensation network redesign or acceptance of ±5% steady-state error. Current-mode control topologies are less sensitive because the loop compensates for inductor value variations; however, the bandwidth reduction and potential instability near the crossover frequency remain concerns. Design practices include selecting the 0805CS-182EJFS from the same manufacturing lot, performing burn-in testing at temperature extremes (-40°C and 85°C), or implementing adaptive compensation that tolerates the full ±5% spread without stability degradation.
What thermal considerations apply when operating the 0805CS-182EJFS at 350 mA continuous current?
At the 350 mA maximum rating, the 0805CS-182EJFS dissipates I²R losses of approximately 110 mW internally. The compact 0805 (2.29mm × 1.71mm) package with 1.45 mm maximum height provides minimal thermal mass and only limited PCB copper area for heat spreading. Thermal analysis requires knowledge of ambient temperature (specified -40°C to 85°C), PCB copper weight (1 oz. vs. 2 oz.), and proximity to other heat sources. At 85°C ambient with poor thermal coupling, the 0805CS-182EJFS core temperature may exceed 120°C, approaching the Curie temperature of ferrite materials where permeability degrades and inductance drops. This triggers a positive feedback loop where inductance loss increases ripple current, worsening losses and core heating. Practical design limits are typically 250–300 mA for the 0805CS-182EJFS in continuous operation at 85°C ambient; pulsed or intermittent operation can briefly approach the 350 mA rating if cooling cycles are provided between pulses.
How should the 0805CS-182EJFS be compared to alternative 1.8 µH inductors in 0603 or 1206 case sizes?
Moving from the 0805CS-182EJFS (0805 case, 2.29mm × 1.71mm) to a 0603 package reduces footprint by approximately 35% but typically increases DCR to 1.5–2.0 Ohms due to thinner wire, offsetting any area savings with increased power loss. Conversely, 1206 case inductors (3.2mm × 1.6mm) offer DCR values of 400–600 mOhm with higher current ratings (500+ mA), trading board area for efficiency gains of 2–5% in battery-powered applications. The 0805CS-182EJFS occupies a middle-ground position: it delivers superior current density compared to 0603 alternatives while maintaining lower cost and higher integration density than 1206 designs. When comparing the 0805CS-182EJFS to shielded 0805 inductors at 1.8 µH, the unshielded 0805CS-182EJFS typically costs 20–30% less but incurs EMI penalties; shielded variants exhibit 200–300 mOhm higher DCR. Design selection depends on whether EMI susceptibility or efficiency loss represents the binding constraint in the application.
Is the 0805CS-182EJFS suitable for input filtering in USB power delivery or fast-charging applications?
USB PD and fast-charging circuits often require inductors to handle transient currents exceeding 1 A for brief intervals, far exceeding the 350 mA continuous rating of the 0805CS-182EJFS. While the inductor can theoretically tolerate momentary overload if saturation current (Isat) were specified (currently listed as '-' in the datasheet), the absence of this parameter indicates the 0805CS-182EJFS lacks hard saturation protection and will suffer significant inductance collapse above approximately 400–450 mA, rendering it unsuitable for dynamic load transients. Additionally, fast-charging topologies often operate at switching frequencies near 500 kHz or higher; the 0805CS-182EJFS Q factor of 15 at 7.96 MHz becomes increasingly non-representative at higher frequencies, and the 120 MHz SRF may interact unfavorably with parasitic circuit elements. For USB PD input filtering, inductors specifically rated for transient currents (with defined Isat values) and optimized for high-frequency switching (>1 MHz) should replace the 0805CS-182EJFS.
What are the practical PCB layout guidelines for the 0805CS-182EJFS to minimize parasitic coupling?
The 0805CS-182EJFS unshielded ferrite core generates significant radiated magnetic fields, particularly at the 7.96 MHz fundamental and harmonics up to the 120 MHz SRF. Layout recommendations include: (1) orienting the 0805CS-182EJFS axis parallel to return paths to minimize coupling loop area; (2) maintaining ≥3× the inductor height (approximately 4.4 mm) separation from sensitive analog inputs or clock traces to avoid crosstalk; (3) placing ground vias within 1 mm of the 0805CS-182EJFS pads to establish low-impedance return paths that reduce external coupling; (4) routing high-frequency switching signals away from the inductor's field region, even if physical distance is adequate. In multilayer boards, the 0805CS-182EJFS should be placed on an outer layer with ground plane immediately below (layer 2) rather than buried between signal planes. These practices reduce the coupling coefficient from typical unshielded designs (0.1–0.3) to practical levels (<0.05), minimizing induced noise in adjacent circuits while the 0805CS-182EJFS operates.
How does moisture sensitivity level 1 (MSL 1) of the 0805CS-182EJFS affect manufacturing and storage?
MSL 1 classification indicates the 0805CS-182EJFS has unlimited shelf life and requires no moisture pre-bake before assembly, significantly reducing manufacturing complexity compared to higher MSL components. Ferrite core materials in the 0805CS-182EJFS are inherently hydrophobic, and the wirewound construction provides natural encapsulation, explaining the favorable MSL rating. However, 'unlimited' MSL does not mean the 0805CS-182EJFS is immune to moisture absorption during extended field storage in high-humidity environments (>90% RH); absorbed moisture can cause temporary inductance shifts of 1–2% until equilibrium is reached. For standard manufacturing, the 0805CS-182EJFS can be stored at room temperature without desiccant packs, reducing logistics costs and enabling just-in-time inventory models. ROHS3 compliance and REACH unaffected status further simplify supply chain management, though periodic reflow of assembled boards should still employ standard ESD and thermal profiling practices regardless of the favorable MSL status of the 0805CS-182EJFS.

Parts with Similar Specifications

The three parts on the right have similar specifications to Delta Electronics/Components 0805CS-182EJFS

Product Attribute 0805CS-181EJFS 0805CS-182EKFS 0805CS-182EJTS 0805CS-181EJTS
Part Number 0805CS-181EJFS 0805CS-182EKFS 0805CS-182EJTS 0805CS-181EJTS
Manufacturer Delta Electronics/Components Delta Electronics/Components Delta Electronics/Components Delta Electronics/Components
Q @ Freq - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Current - Saturation (Isat) - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Current Rating (Amps) - - - -
Type - - - -
Height - Seated (Max) - - - -
Size / Dimension - - - -
Inductance Frequency - Test - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Inductance - - - -
Material - Core - - - -
Frequency - Self Resonant - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Tolerance - - - -
DC Resistance (DCR) - - - -
Series - - - -
Features - - - Simultaneous Sampling
Ratings - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Base Product Number - DAC34H84 MAX500 ADS62P42
Shielding - - - -

0805CS-182EJFS Datasheet PDF

Download 0805CS-182EJFS pdf datasheets and Delta Electronics/Components documentation for 0805CS-182EJFS - Delta Electronics/Components.

Datasheets
0805CS Series Datasheet.pdf

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Evaluation: 10 Articles

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    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

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  • Circ***FixerTom
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    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
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    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
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    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
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    one of my hobbies is skydiving. and when i'm skydiving this works great.

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0805CS-182EJFS Image

0805CS-182EJFS

Delta Electronics/Components
32D-0805CS-182EJFS

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