What does low ESR high-frequency mean for this capacitor?

Low ESR means the capacitor dissipates less heat under AC ripple current, and high-frequency rating means it maintains stable performance at 10kHz–100kHz switching frequencies typical in modern SMPS and inverters. This allows higher ripple current handling in a smaller can.

Will this fit a standard 35mm snap-in PCB layout?

Yes. The body is Ø35mm with 10mm pin pitch, which matches standard snap-in footprints such as Rubycon VXG, Nichicon LGX, and Vishay PUL-SI 35mm-class cans. Only the height (30mm) differs — verify chassis clearance.

Can I use a 500V capacitor where the original was 450V?

Yes, a 500V rating is safe headroom over a 450V original as long as capacitance (180uF) and case footprint match. It will run cooler and last longer under the same rail voltage.

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DIYMars

180MFD 500V Snap-in Aluminum Electrolytic Capacitor 35x30 Low ESR

Name: 180uF 500V Low ESR High-Frequency Snap-in Aluminum Electrolytic Capacitor 35×30mm
Brand: YourBrand
Price: 6.99 USD
Availability: InStock

$4.39 USD

~~$9.99 USD~~ $4.39 USD

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Size 500V 180UF(35*30)

180uF 500V Low ESR High-Frequency Snap-in Aluminum Electrolytic Capacitor – 35×30mm

100% brand new polarized 180µF (180MFD) aluminum electrolytic capacitor, snap-in mounting, rated 500V DC. Built as a low ESR / high-frequency power capacitor in a compact Ø35×30mm can with standard 10mm pin pitch. 105°C temperature rating, long-life electrolyte, high ripple current capability. Targeted at SMPS bulk stage, inverter DC-link, UPS bus, and servo drive filtering.[4,10](@ref)

Specifications

Capacitance	180µF (180MFD), ±20%
Voltage Rating	500V DC (surge ~550V per IEC convention)
Type	Non-solid polarized aluminum electrolytic
ESR	Low ESR grade (hundreds of mΩ range @ 120Hz, series dependent)
Ripple Current	High-frequency rated (verify by series; ~1.2–1.8A class @ 10kHz)
Mounting	Snap-in, through-hole PCB, 2-pin / keyed option
Case Size	Ø35mm × 30mm height
Pin Pitch	10mm standard
Temperature	105°C (–25°C to +105°C operating)
Lifetime	2000h–5000h @ 105°C (series dependent)
Polarity	Polarized – negative stripe + top vent

Why Low ESR + High Frequency

Lower self-heating under switched ripple current (10kHz–100kHz).
Smaller can for same ripple duty vs. general-purpose GP series.
Stable capacitance and low impedance at operating temperature, not just at 20°C/120Hz.
Longer service life in continuously switching supplies.

Cross-reference / Compatible Footprints

Rubycon: VXG series (e.g. 500VXG180MEFC35X30 class) [10](@ref)
Nichicon: LGX series 500V snap-in class [13](@ref)
Vishay BCcomponents: PUL-SI / 159 PUL-SI 500V long-life snap-in [1](@ref)
TDK-EPCOS: B43547 long-life snap-in 200–500V [4](@ref)
CDE: 380LQ / 383LQ snap-in equivalents

Typical Applications

SMPS input bulk / DC bus capacitor after PFC
Solar micro-inverter & string inverter DC-link
Servo drive and VFD DC bus filter
UPS bus capacitor and weld-source smoothing
Medical/professional power supply high-voltage rail
Replacement for bulged 180µF 500V snap-ins in industrial gear

Selection & Installation Notes

500V rated → for rectified 230V AC (~325V DC peak) with comfortable headroom, or 400V-class rails derated.
Ø35 + 10mm pitch = drop-in to standard 35mm snap-in hole patterns; check 30mm height clearance.
Don't parallel blindly without checking inrush/ripple share; match ESR if paralleling with existing caps.
Polarized only – never in AC couple or signal path; reverse = vent rupture.
Wave solder ≤260°C peak, ≤10s/pin; don't torque the can into the board.