Is there a pin-compatible replacement for CY1102ME1IEF45W2A2?

Yes, CY1102ME1PEF45W2P0 and CY1102KE1IEB49H2A2 both feature the same radial package with 10mm lead spacing, making them physically compatible. As they are simple 2-pin devices, their pinout is compatible.

What risks should I check before replacing CY1102ME1IEF45W2A2?

Before replacing, you must verify the safety class (must be Y1 or higher), AC voltage rating (≥400V), and capacitance (1nF). Using a part with a different safety class (like X2 or Y2) or lower voltage is a critical safety risk.

CY1102ME1IEF45W2A2 Alternatives, Datasheet & Cross Reference | Dersonic

Find and compare alternatives for the Dersonic CY1102ME1IEF45W2A2, a 1nF 400V AC Y1 safety capacitor. Review pin-compatible options, upgrades, and parametric alternatives to ensure circuit performance and safety compliance.

AI replacement insight

Package risklow

Top candidates match the radial package and 10mm lead spacing.

Electrical riskmedium

Risks include using a part with different capacitance or dielectric properties. Avoid parts with lower voltage or safety ratings.

Can it be replaced directly?

CY1102ME1PEF45W2P0 is a strong candidate for direct replacement, matching all key electrical parameters and package details. However, datasheet verification is recommended.

Best replacement path

The best path is an upgrade to CY1102KE1IEB49H2A2, which offers tighter tolerance and a better temperature characteristic (Y5P vs Y5V).

Main risk

The main risk is using a part with different capacitance or a lower safety rating (e.g., Y2 instead of Y1), which can compromise circuit performance and safety compliance.

Recommended alternatives

Strong alternative with matching package, voltage, capacitance, and tolerance. Belongs to the same manufacturer series.

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Alternative comparison matrix

Feature / factor	CY1102ME1IEF45W2A2	CY1102ME1PEF45W2P0	CY1102KE1IEB49H2A2	Compatibility / risk
Package	Radial, 10mm Lead Spacing	Radial, 10mm Lead Spacing	Radial, 10mm Lead Spacing	Radial, 10mm Lead Spacing — Package and lead spacing match.; CY1102KE1IEB49H2A2: Package and lead spacing match.
Voltage	400V	400.0V	400.0V	400.0V — AC voltage rating matches.; CY1102KE1IEB49H2A2: AC voltage rating matches.
Capacitance	1nF	1nF	1nF	1nF — Capacitance matches.; CY1102KE1IEB49H2A2: Capacitance matches.
Dielectric	Y5V	Y5V	Y5P	Y5V / Y5P — Dielectric material matches.; CY1102KE1IEB49H2A2: Y5P has a better temperature characteristic than Y5V.
Tolerance	±20%	±20%	±10%	±20% / ±10% — Tolerance matches.; CY1102KE1IEB49H2A2: Tighter tolerance is an upgrade.

Application & sourcing insights

Questions & answers

The best alternative is likely CY1102KE1IEB49H2A2, which is an upgrade with tighter tolerance and a better temperature characteristic. For a like-for-like replacement, CY1102ME1PEF45W2P0 is a very strong match.