The KEMET C323C180K3G5TA from the GoldMax 300 Comm C0G series represents a precision radial leaded ceramic capacitor engineered with Class I C0G (NP0) dielectric material, delivering 18 pF capacitance at a rated voltage of 25V. This through-hole component operates across an extended temperature range from -55°C to 125°C while maintaining stable electrical performance, making it suitable for circuits requiring minimal capacitance drift over temperature and time. The ±10% tolerance specification provides reliable capacitance accuracy for general purpose filtering, coupling, and timing applications where Class I temperature characteristics are required.
Built on C0G ceramic dielectric technology, this capacitor exhibits near-zero temperature coefficient, ensuring capacitance stability across its full operating range without the aging effects typical of Class II dielectrics. The radial lead configuration with 0.200" (5.08mm) lead spacing and formed leads facilitates straightforward PCB integration in through-hole assembly processes. Physical dimensions of 0.200" L x 0.125" W (5.08mm x 3.18mm) with a maximum seated height of 0.300" (7.62mm) allow compatibility with standard component spacing on mixed-technology circuit boards.
The Low ESL (Equivalent Series Inductance) feature enhances high-frequency performance by minimizing parasitic inductance, which becomes significant in RF circuits, precision oscillators, and signal conditioning stages. This characteristic, combined with the inherent low dissipation factor of C0G dielectric, supports applications in analog signal paths, resonant circuits, and precision timing networks where reactive component quality directly influences circuit accuracy. The 25V voltage rating provides adequate margin for 5V, 12V, and other low-voltage digital and analog systems commonly found in instrumentation, communications equipment, and embedded control designs.
As an active product manufactured to RoHS3 compliance standards and unaffected by REACH regulations, the C323C180K3G5TA maintains qualification for contemporary electronics manufacturing while avoiding moisture sensitivity concerns applicable to surface-mount alternatives. The bulk packaging format suits prototyping, small-batch production, and repair operations where tape-and-reel packaging overhead is unnecessary. The combination of proven radial lead technology, stable C0G dielectric performance, and general purpose rating positions this component for reliable integration across diverse electronic systems requiring predictable capacitive behavior under varying environmental and electrical conditions.
C323C180K3G5TA (1)
Replacing KEMET C323C180K3G5TA in 18 pF C0G Through-Hole Capacitor Designs
When a KEMET C323C180K3G5TA ceramic capacitor becomes unavailable, reaches an allocation constraint, or needs second-source approval, the replacement decision is not based on capacitance alone. In RF tuning, timing, filtering, oscillator trimming, and high-impedance analog circuits, small-value capacitors such as 18 pF can affect frequency response, phase margin, parasitic behavior, and long-term stability.
The original part is a KEMET GoldMax 300 Comm C0G radial ceramic capacitor rated at 18 pF, ±10%, 25 V, with a C0G/NP0 dielectric. Suitable replacement evaluation should consider capacitance tolerance, voltage derating, temperature coefficient, lead spacing, radial body size, dielectric class, parasitic inductance, and production availability.
Potential equivalent and alternative part numbers for KEMET C323C180K3G5TA include:
- KEMET
C322C180K3G5TA
C322C180K3G5TA
KEMET
CAP CER RAD 18PF 25V C0G 10%
2000000
- KEMET
C315C180K3G5TA
C315C180K3G5TA
KEMET
CAP CER 18PF 25V C0G/NP0 RADIAL
200000
- Murata
RCE5C1H180J0A2H03B
RCE5C1H180J0A2H03B
Murata Electronics
CAP CER 18PF 50V NP0 RADIAL
200000
- TDK
FG18C0G1H180JNT06
FG18C0G1H180JNT06
TDK Corporation
CAP CER 18PF 50V C0G RADIAL
2000000
- KYOCERA AVX SR211A180KAA
- Vishay
K180K15C0GF5TL2
K180K15C0GF5TL2
Vishay Beyschlag/Draloric/BC Components
CAP CER 18PF 50V C0G/NP0 RADIAL
2000000
These parts are not interchangeable in every layout or application without verification. Some offer the same nominal capacitance and dielectric behavior but differ in voltage rating, tolerance, lead pitch, body size, packaging, or availability. The best replacement for KEMET C323C180K3G5TA depends on whether the design priority is drop-in PCB fit, tighter capacitance control, higher voltage margin, RF stability, or procurement flexibility.
What KEMET C323C180K3G5TA Provides in the Original Circuit
KEMET C323C180K3G5TA is an 18 pF ±10% ceramic capacitor using C0G/NP0 dielectric technology. Its 25 V rating, -55°C to 125°C operating range, radial through-hole package, and low ESL construction make it suitable for stable low-capacitance functions where dielectric drift and voltage coefficient must remain low.
Key characteristics influencing replacement selection include:
| Parameter | KEMET C323C180K3G5TA Engineering Relevance |
|---|---|
| Manufacturer | KEMET |
| Series | GoldMax 300 Comm C0G |
| Capacitance | 18 pF; replacement should normally remain 18 pF unless circuit retuning is acceptable |
| Tolerance | ±10%; tighter tolerance alternatives may improve repeatability but can slightly change production calibration assumptions |
| Rated Voltage | 25 V; alternatives with 50 V or 100 V ratings are usually acceptable if size and parasitics remain compatible |
| Dielectric | C0G/NP0; replacement should stay C0G/NP0 for stable capacitance over temperature and voltage |
| Operating Temperature | -55°C to 125°C; replacements should match this range for industrial or wide-temperature designs |
| Mounting Type | Through hole, radial; SMD capacitors are not direct replacements without PCB redesign or adapters |
| Lead Spacing | 0.200 inch / 5.08 mm; a close match reduces forming stress and assembly changes |
| Body Size | 0.200" L x 0.125" W, 0.300" seated height max; affects board clearance and component density |
| Features | Low ESL; relevant in RF, high-speed edges, timing networks, and low-loss signal paths |
| Compliance | RoHS3 compliant, REACH unaffected; replacements should meet the same compliance expectations |
The C0G/NP0 dielectric is the main reason this capacitor is used in precision and frequency-sensitive circuits. Unlike high-K dielectrics such as X7R or Y5V, C0G maintains capacitance stability across temperature, applied voltage, and aging. Therefore, an 18 pF X7R capacitor should not be treated as an equivalent substitute for KEMET C323C180K3G5TA even if the capacitance and voltage rating appear similar.
Typical application areas include oscillator load capacitance, RF matching and trimming, ceramic resonator circuits, small-signal filters, timing networks, high-impedance analog paths, and general-purpose stable capacitance nodes. In these uses, the replacement must preserve both the nominal capacitance and the parasitic profile closely enough that the circuit does not require redesign.
Candidate Replacements for KEMET C323C180K3G5TA 18 pF C0G Radial Capacitor
The following table compares practical replacement candidates for KEMET C323C180K3G5TA. Each option should be checked against the latest manufacturer datasheet, PCB footprint, lead forming requirements, and application voltage.
| Manufacturer | Part Number | Key Specifications | Product Features | Typical Applications | Why It Can Replace the Original Part | Main Differences or Limitations | Recommended Usage |
|---|---|---|---|---|---|---|---|
| KEMET |
C322C180K3G5TA
KEMET
CAP CER RAD 18PF 25V C0G 10%
2000000
| 18 pF, ±10%, 25 V, C0G/NP0, radial ceramic capacitor | Same manufacturer family, stable C0G dielectric, through-hole construction | General-purpose stable capacitance, RF trimming, oscillator circuits, low-pF filtering | Closely aligned electrical rating and dielectric behavior with KEMET C323C180K3G5TA | Case code and physical dimensions may differ from C323; lead spacing and seated height must be confirmed | Strong first-choice alternative when KEMET sourcing continuity and similar electrical behavior are preferred |
| KEMET |
C315C180K3G5TA
KEMET
CAP CER 18PF 25V C0G/NP0 RADIAL
200000
| 18 pF, ±10%, 25 V, C0G/NP0, radial ceramic capacitor | KEMET GoldMax-style C0G stability, through-hole leaded construction | Compact through-hole boards, stable timing and tuning circuits | Same capacitance, tolerance, voltage class, dielectric type, and manufacturer | Smaller or different body/lead geometry may not be drop-in for a 5.08 mm footprint | Suitable when electrical equivalence matters more than exact mechanical duplication |
| Murata |
RCE5C1H180J0A2H03B
Murata Electronics
CAP CER 18PF 50V NP0 RADIAL
200000
| 18 pF, ±5%, 50 V, C0G/NP0-class radial multilayer ceramic capacitor | Tighter tolerance than original, higher voltage rating, stable temperature behavior | Oscillator load capacitors, resonant circuits, RF and analog signal conditioning | Same nominal capacitance with C0G stability; 50 V rating provides additional voltage margin | ±5% tolerance may shift circuits originally designed around ±10% statistical spread; lead form and pitch require verification | Good choice for designs needing better capacitance consistency and higher voltage margin |
| TDK |
FG18C0G1H180JNT06
TDK Corporation
CAP CER 18PF 50V C0G RADIAL
2000000
| 18 pF, typically ±5%, 50 V, C0G, radial leaded multilayer ceramic capacitor | Low-loss C0G dielectric, radial through-hole style, higher voltage class | RF matching, filters, oscillators, stable small-signal networks | Same 18 pF value and C0G dielectric; higher rated voltage generally supports safe derating | Mechanical outline and lead style may not match KEMET C323 exactly; availability may vary by region | Suitable for performance-focused replacement where PCB fit is verified |
| KYOCERA AVX | SR211A180KAA | 18 pF, ±10%, C0G/NP0, radial ceramic capacitor, commonly higher voltage class depending on suffix | Established radial MLCC family, stable dielectric, through-hole mounting | RF circuits, timing networks, industrial control boards, replacement of legacy leaded capacitors | Same capacitance and tolerance class with C0G/NP0 behavior | Voltage rating and dimensions must be checked for the exact ordering suffix; may have different body profile | Useful second-source option where radial MLCC availability is the main concern |
| Vishay |
K180K15C0GF5TL2
Vishay Beyschlag/Draloric/BC Components
CAP CER 18PF 50V C0G/NP0 RADIAL
2000000
| 18 pF, ±10%, C0G/NP0-type radial ceramic capacitor, voltage rating dependent on exact series configuration | Leaded ceramic construction, stable dielectric class, suitable for small capacitance circuits | General-purpose signal circuits, oscillators, compensation and coupling where low capacitance is required | Same nominal capacitance and tolerance with C0G-type stability | Exact mechanical size, voltage rating, and lead pitch must be confirmed from the current Vishay datasheet | Consider when Vishay supply chain preference or alternate approved vendor coverage is required |
Among these candidates, KEMET
C322C180K3G5TA
is often the closest sourcing path because it remains within the KEMET radial C0G capacitor family. Murata
C322C180K3G5TA
KEMET
CAP CER RAD 18PF 25V C0G 10%
2000000
RCE5C1H180J0A2H03B
and TDK
RCE5C1H180J0A2H03B
Murata Electronics
CAP CER 18PF 50V NP0 RADIAL
200000
FG18C0G1H180JNT06
may provide tighter tolerance and higher voltage rating, which can be beneficial in oscillator and RF applications where capacitance spread affects frequency accuracy. KYOCERA AVX SR211A180KAA and Vishay
FG18C0G1H180JNT06
TDK Corporation
CAP CER 18PF 50V C0G RADIAL
2000000
K180K15C0GF5TL2
are useful broader second-source options, but their exact mechanical and voltage details should be validated before production substitution.
K180K15C0GF5TL2
Vishay Beyschlag/Draloric/BC Components
CAP CER 18PF 50V C0G/NP0 RADIAL
2000000
Engineering Comparison of KEMET C323C180K3G5TA Replacement Options
Replacement selection should begin by separating electrical compatibility from mechanical compatibility. A capacitor can match 18 pF C0G performance but still fail as a production substitute if the lead spacing, body height, or insertion profile does not fit the PCB or assembly process. Conversely, a mechanically similar part with a different dielectric class would not be a sound substitute in frequency-sensitive circuits.
| Decision Factor | KEMET C322C180K3G5TA | KEMET C315C180K3G5TA | Murata RCE5C1H180J0A2H03B | TDK FG18C0G1H180JNT06 | KYOCERA AVX SR211A180KAA | Vishay K180K15C0GF5TL2 |
|---|---|---|---|---|---|---|
| Electrical Compatibility | High; same nominal capacitance, tolerance, voltage class, and dielectric family | High electrically; same 18 pF, ±10%, 25 V, C0G profile | High; same value with tighter ±5% tolerance and 50 V rating | High; same value, C0G dielectric, typically tighter tolerance and higher voltage | High if exact suffix confirms C0G/NP0 and suitable voltage | High if exact datasheet confirms C0G/NP0 and voltage rating |
| Mechanical Compatibility | Potentially close, but case code should be checked against C323 footprint | May require lead forming or footprint review | Requires confirmation of lead pitch, body width, and seated height | Requires confirmation of radial pitch and component height | Requires confirmation of SR21 body dimensions and lead spacing | Requires confirmation of lead pitch and package outline |
| Performance Differences | Most similar to original electrical behavior | Similar electrical behavior; package parasitics may differ slightly | Tighter capacitance tolerance may improve repeatability in tuned circuits | Stable RF behavior expected; voltage margin may improve robustness | Good C0G stability; parasitics depend on body geometry | Suitable C0G behavior if exact series data matches requirements |
| Reliability Considerations | Same manufacturer ecosystem may simplify qualification | Same dielectric and voltage class; mechanical stress from footprint mismatch should be assessed | Higher voltage rating can improve derating margin in some circuits | Higher voltage rating supports conservative derating | Established leaded MLCC family; verify temperature and voltage ratings | Verify current production status and compliance documentation |
| Package Availability | Useful if C323 case is unavailable but KEMET line remains accessible | Useful for compact substitution if approved mechanically | Strong option where Murata radial MLCC supply is available | Strong option where TDK leaded MLCC sourcing is preferred | Useful for alternate AVL coverage | Useful for Vishay-approved supply chains |
| Cost Considerations | Usually comparable to original KEMET radial capacitor | May be comparable, depending on case and availability | Tighter tolerance and higher voltage may carry a price difference | Similar possibility of higher cost due to rating/tolerance | Cost depends on distributor stock and exact voltage suffix | Cost depends on lifecycle and stocking region |
| Best-Fit Scenario | Closest KEMET-family substitute when electrical matching is the priority | Electrical substitute where PCB layout can accept a different case | Designs needing tighter capacitance control or 50 V derating | RF or oscillator designs where C0G stability and voltage margin are preferred | Multi-source BOM strategy for leaded C0G capacitors | Alternate vendor approval when Vishay parts are already qualified |
| Main Limitation | Not automatically a mechanical drop-in without case verification | Mechanical mismatch risk versus C323 footprint | Tolerance difference may alter calibration assumptions | Mechanical fit and sourcing must be confirmed | Exact suffix matters for voltage and dimensions | Exact series configuration must be checked carefully |
For a near-equivalent KEMET C323C180K3G5TA replacement, start with KEMET
C322C180K3G5TA
and KEMET
C322C180K3G5TA
KEMET
CAP CER RAD 18PF 25V C0G 10%
2000000
C315C180K3G5TA
because they preserve the same manufacturer, capacitance, tolerance, rated voltage, and C0G dielectric class. If the design benefits from tighter tolerance or higher voltage derating, Murata
C315C180K3G5TA
KEMET
CAP CER 18PF 25V C0G/NP0 RADIAL
200000
RCE5C1H180J0A2H03B
and TDK
RCE5C1H180J0A2H03B
Murata Electronics
CAP CER 18PF 50V NP0 RADIAL
200000
FG18C0G1H180JNT06
become attractive alternatives. For broader approved-vendor coverage, KYOCERA AVX SR211A180KAA and Vishay
FG18C0G1H180JNT06
TDK Corporation
CAP CER 18PF 50V C0G RADIAL
2000000
K180K15C0GF5TL2
can be evaluated after confirming the exact package, lead spacing, voltage rating, and compliance data.
K180K15C0GF5TL2
Vishay Beyschlag/Draloric/BC Components
CAP CER 18PF 50V C0G/NP0 RADIAL
2000000
Before approving any alternative to KEMET C323C180K3G5TA, compare the candidate capacitor in the actual circuit for capacitance tolerance impact, frequency shift, insertion fit, thermal range, and assembly stress. For quotations and sourcing support for KEMET C323C180K3G5TA replacement parts, obtain pricing through IC-Components.com or email Info@IC-Components.com.
