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1825J3K00101KCT - Knowles Syfer

Name: Knowles Syfer 1825J3K00101KCT
Brand: Knowles Syfer
SKU: 1825J3K00101KCT
Price: 1.14 USD
Availability: InStock
Rating: 5 (10 reviews)

Manufacturer Part Number: 1825J3K00101KCT

Manufacturer: Knowles Syfer

Allelco Part Number: 98D-1825J3K00101KCT

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 47,311 pcs available, New & Original

Parts Description: CAP CER 100PF 3KV C0G/NP0 1825

Package: 1825 (4564 Metric)

Data sheet: 1825J3K00101KCT.pdf

HTML Datasheet
MLCC Capacitor Datasheet.pdf

Environmental Information
Environmental Status Syfer.pdf

RoHs Status: ROHS3 Compliant

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Specifications

1825J3K00101KCT Tech Specifications
Knowles Syfer - 1825J3K00101KCT technical specifications, attributes, parameters and parts with similar specifications to Knowles Syfer - 1825J3K00101KCT

Product Attribute	Attribute Value
Manufacturer	Knowles Syfer
Voltage - Rated	3000V (3kV)
Tolerance	±10%
Thickness (Max)	0.098" (2.50mm)
Temperature Coefficient	C0G, NP0 (1B)
Size / Dimension	0.177" L x 0.252" W (4.50mm x 6.40mm)
Series	-
Ratings	-
Package / Case	1825 (4564 Metric)
Package	Tape & Reel (TR)

Product Attribute	Attribute Value
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount, MLCC
Lead Style	-
Lead Spacing	-
Height - Seated (Max)	-
Features	-
Failure Rate	-
Capacitance	100 pF
Base Product Number	1825J
Applications	General Purpose

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8532.24.0020

Frequently Asked Questions(FAQ)

What makes the 1825J3K00101KCT suitable for high-voltage filtering applications compared to standard MLCCs?: The 1825J3K00101KCT is rated for 3kV, which positions it in the high-voltage ceramic capacitor segment where standard general-purpose MLCCs typically max out at 50V to 100V. This 3000V rating on a 100 pF capacitance enables the 1825J3K00101KCT to function in power conversion topologies, high-voltage DC bus filtering, and test equipment where voltage stress across decoupling stages exceeds conventional ratings. The C0G/NP0 temperature coefficient ensures capacitance drift remains under 0.3% across the -55°C to 125°C operating window, critical for precision analog circuits that cannot tolerate capacitive value shifts during thermal transients.

How does the ±10% tolerance of the 1825J3K00101KCT affect circuit design for resonant or tuned filter networks?: The ±10% tolerance band on the 1825J3K00101KCT creates a capacitance range of 90 pF to 110 pF, which introduces a ±5.3% frequency shift in LC resonant circuits. For a tuned filter targeting a specific frequency, this tolerance stack demands post-assembly trimming or parallel/series tuning networks if center frequency accuracy within ±2% is required. In snubber and damping applications, the 1825J3K00101KCT's tolerance is less critical because energy dissipation and overshoot control degrade gradually across the tolerance band rather than causing catastrophic failure. Engineers must account for worst-case component pairing when matching multiple 1825J3K00101KCT units in parallel for capacitance multiplication or in ladder networks for high-frequency switching supplies.

Can the 1825J3K00101KCT withstand transient voltage spikes above its 3kV rating without degradation?: Ceramic capacitors including the 1825J3K00101KCT exhibit voltage derating rather than binary failure thresholds. Exposure to transient spikes 10–15% above the 3000V rating may cause micro-cracking and accelerated aging, reducing the effective dielectric lifetime without immediate open-circuit failure. The 1825J3K00101KCT's C0G/NP0 dielectric is more resilient to voltage stress than class II formulations, but design practice requires implementing surge suppression (varistors, TVS diodes, or primary-side clipping) to keep transient peaks within the 3kV envelope. For space-constrained designs, operating the 1825J3K00101KCT at 85–90% of rated voltage (approximately 2.5–2.7kV) extends capacitor life by reducing field strength acceleration effects.

What is the parasitic inductance and ESR impact of the 1825J3K00101KCT in high-frequency switching applications?: The 1825J3K00101KCT's 1825 (4.5mm × 6.4mm × 2.5mm) package geometry introduces approximately 300–400 pH of lead-frame inductance, limiting high-frequency impedance reduction above 100 MHz. In switch-mode power supplies operating at 500 kHz to 1 MHz, the 1825J3K00101KCT's inductive reactance becomes significant relative to its 100 pF capacitive reactance, reducing the effective filtering bandwidth. ESR (typically 50–200 mΩ for high-voltage ceramics) creates thermal dissipation during ripple current events. Engineers using the 1825J3K00101KCT in MHz-range applications should pair it with lower-inductance components (0402 or 0201 packages) in parallel, or position the 1825J3K00101KCT at bulk-filtering stages where frequency response is less critical than voltage handling and stability.

How does the C0G/NP0 temperature coefficient of the 1825J3K00101KCT compare to X7R or Y5V alternatives for precision analog front-ends?: The 1825J3K00101KCT specifies C0G/NP0 temperature coefficient, guaranteeing capacitance change within ±0.3% across -55°C to 125°C. X7R formulations allow ±15% drift, and Y5V permits ±82% variation, making them unsuitable for precision timing, reference filtering, or matched-pair applications. In transimpedance amplifier input stages or precision current-mode circuits, the 1825J3K00101KCT's stability prevents gain and bandwidth shifts that would otherwise require recalibration across temperature extremes. For medical or aerospace applications where temperature swings exceed 100°C, the 1825J3K00101KCT's controlled thermal behavior eliminates parametric drift as a design risk factor, reducing validation complexity and improving field reliability predictions.

What thermal management considerations apply when the 1825J3K00101KCT dissipates ripple current in a 3kV bus?: Ripple current dissipation in the 1825J3K00101KCT generates localized heating at the capacitor body, particularly in high-frequency or high-duty-cycle applications. A 1 A RMS ripple current at 1 MHz through the 1825J3K00101KCT with estimated 100 mΩ ESR produces approximately 100 mW continuous dissipation. High-voltage capacitors have limited thermal pathways due to thick dielectric structures, so localized temperature rise of 20–40°C above ambient is common. Designers must ensure the 1825J3K00101KCT operates below its specified maximum temperature of 125°C under worst-case ambient and ripple conditions. In densely packed assemblies, grouping multiple high-voltage capacitors like the 1825J3K00101KCT creates thermal hotspots; spreading components or ensuring air circulation extends capacitor life significantly.

Why is MSL 1 (Unlimited) moisture sensitivity significant for the 1825J3K00101KCT in automated board assembly?: MSL 1 classification on the 1825J3K00101KCT means the component absorbs moisture irreversibly without moisture barrier packaging, and reflow soldering at 260°C poses no risk of delamination or cracking. This contrasts with MSL 3–4 parts that require pre-bake conditioning and strict lead-time management. In high-volume manufacturing, the 1825J3K00101KCT's unlimited MSL allows warehouse storage without desiccant bags or ESD dry boxes, reducing material handling complexity and component cost. However, designers should verify that the printed circuit board's glass transition temperature (Tg) exceeds 140°C; if board Tg is marginal, moisture absorption in adjacent components may still cause reliability issues independent of the 1825J3K00101KCT's MSL rating.

How do voltage derating curves for the 1825J3K00101KCT interact with operating temperature to affect capacitor lifetime models?: Ceramic capacitor lifetime follows an Arrhenius relationship: a 10°C temperature increase approximately halves the expected service life. The 1825J3K00101KCT operating at 3kV and 125°C (maximum rated temperature) experiences cumulative stress from both voltage and thermal fields. If real operating temperature is reduced to 85°C, lifetime approximately doubles for the same voltage stress. Conversely, if applied voltage is derated to 2.5kV at 125°C, lifetime improves significantly due to reduced electric field intensity. Design calculations must integrate both derating factors; operating the 1825J3K00101KCT at 80% voltage and 40°C below maximum temperature can extend operational life by 5–10× compared to worst-case ratings, enabling 10+ year reliability predictions in mission-critical applications.

What soldering profile and thermal stress considerations are specific to the 1825J3K00101KCT's 1825 package geometry?: The 1825J3K00101KCT's relatively large 4.5mm × 6.4mm footprint creates thermal mass that resists rapid heating during reflow. Standard lead-free soldering profiles (peak 260°C, 220 second ramp-to-peak) may require extended preheat time for the 1825J3K00101KCT to avoid internal thermal gradients that crack the ceramic body. Manufacturers typically recommend preheat to 150–180°C for 60–120 seconds before peak heating. Upon cooldown, the 1825J3K00101KCT cools more slowly than smaller 0402 components, potentially creating mechanical stress if rapid convection cooling is applied. Wave soldering the 1825J3K00101KCT is not recommended; reflow soldering with controlled thermal ramps (3–5°C/second) ensures uniform ceramic temperature and minimizes cracking risk during first assembly.

How should designers select between the 1825J3K00101KCT and lower-voltage alternatives when designing power conversion circuits with multiple voltage domains?: In multi-rail systems with 48V intermediate bus converter outputs feeding downstream isolated converters, using 1825J3K00101KCT at the 48V rail would be significant over-specification; a 100V or 200V ceramic capacitor would suffice. The 1825J3K00101KCT justifies selection only when primary or secondary bus voltages approach or exceed 1.5kV, or when the design must accommodate transient peak voltages from back-EMF events or dV/dt coupling. For a 400V DC bus with ±20% overshoot potential, the 1825J3K00101KCT's 3kV rating provides 2.1× safety margin, whereas a 630V MLCC would offer only 1.5× margin. Selecting the 1825J3K00101KCT requires justification through transient analysis; using it for 400V applications when a 630V alternative costs similarly reflects incomplete cost trade-off evaluation.

What is the effective capacitance of the 1825J3K00101KCT under DC bias voltage conditions in high-voltage circuits?: The 1825J3K00101KCT operates at or near its rated 3kV in many applications, and DC bias effects become significant. Class II ceramics (including C0G/NP0) experience nominal 5–15% capacitance loss at full rated voltage due to polarization effects. At 3kV bias, the 1825J3K00101KCT's 100 pF nominal value may drop to 85–95 pF in actual circuit operation. This bias derating is often overlooked in hand calculations; circuit designers assuming 100 pF at 3kV risk underestimating ripple voltage or filter frequency shifts. Detailed datasheets typically provide bias curves showing capacitance versus applied voltage; engineers must cross-reference these curves and account for worst-case bias conditions when the 1825J3K00101KCT operates continuously near rated voltage.

Can multiple 1825J3K00101KCT units be paralleled safely to achieve higher capacitance while maintaining voltage rating integrity?: Paralleling the 1825J3K00101KCT units increases total capacitance linearly (two units yield 200 pF) while voltage rating remains 3kV. Parallel connection is thermally and electrically safe provided PCB layout minimizes trace inductance between pads and ensures current distribution is approximately equal among paralleled elements. Unequal current sharing can stress one capacitor preferentially, reducing its effective lifetime. The main design consideration is identifying how parallel parasitic inductance affects high-frequency filtering: two 1825J3K00101KCT units in parallel reduce total inductance by approximately 50% compared to a single unit, improving impedance profile above 50–100 MHz. However, this benefit is realized only if PCB layout implements symmetric, interleaved trace paths; otherwise, the 1825J3K00101KCT units see different resonant frequencies, complicating filter response prediction.

How does RoHS3 compliance of the 1825J3K00101KCT affect supply chain and long-term availability for legacy or extended-lifecycle designs?: The 1825J3K00101KCT is RoHS3 compliant, indicating lead-free solder compatibility and compliance with EU/global electronics material directives. RoHS3 status does not automatically guarantee 10+ year availability; component discontinuation is driven by manufacturing volume and market demand rather than regulatory classification. For aerospace, defense, or 20+ year lifecycle products, designers must confirm extended-lifecycle or mil-grade variants of high-voltage ceramics separate from the 1825J3K00101KCT. Military or screened versions may use alternative part numbers and longer lead times. RoHS3 compliance of the 1825J3K00101KCT simplifies procurement in civilian markets but should not be conflated with extended availability or long-term supply guarantees; designers requiring guaranteed supply should evaluate design alternatives or negotiate long-term supply agreements independent of RoHS status.

Parts with Similar Specifications

The three parts on the right have similar specifications to Knowles Syfer 1825J3K00101KCT

Product Attribute
Part Number	1825J3K00101FCT	1825J3K00101JCT	1825J3K00101KCR	1825J3K00100KCT
Manufacturer	Knowles Syfer	Knowles Syfer	Knowles Syfer	Knowles Syfer
Lead Style	-	-	-	-
Features	-	-	-	Simultaneous Sampling
Height - Seated (Max)	-	-	-	-
Lead Spacing	-	-	-	-
Thickness (Max)	-	-	-	-
Base Product Number	-	DAC34H84	MAX500	ADS62P42
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Tolerance	-	-	-	-
Applications	-	-	-	-
Temperature Coefficient	-	-	-	-
Capacitance	-	-	-	-
Failure Rate	-	-	-	-
Voltage - Rated	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Ratings	-	-	-	-
Size / Dimension	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Series	-	-	-	-

1825J3K00101KCT Datasheet PDF

Download 1825J3K00101KCT pdf datasheets and Knowles Syfer documentation for 1825J3K00101KCT - Knowles Syfer.

HTML Datasheet: MLCC Capacitor Datasheet.pdf
Environmental Information: Environmental Status Syfer.pdf

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