This is a radial-leaded aluminum electrolytic capacitor rated for 33µF at 400V DC, in a 13×21mm can. This size/rating is a very common general-purpose value used in switch-mode power supplies, LED drivers, ballasts, and higher-voltage DC filtering stages, and is available from multiple brands (Panasonic EEUEB2G330 is the equivalent in the larger 16×25mm case; the 13×21mm case is the more compact version commonly sold by Chinese manufacturers such as HYCDZ and others).

Technical Specifications

Parameter Value

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Capacitance 33 µF

Rated Voltage (DC) 400 V

Capacitance Tolerance ±20% (M)

Case Size 13mm diameter × 21mm height

Lead Spacing (Pitch) 5.0 mm

Operating Temp Range -25°C to +105°C

Rated Ripple Current ~193–335 mA (varies by series/brand, see note)

Max ESR ~1.2 Ω @ 100kHz, 20°C

Dissipation Factor (tanδ) ≤ 0.20 @ 120Hz, 20°C

Leakage Current ≤ 0.01CV or 3 µA (whichever is greater)

Load Life / Endurance 3,000–5,000 hours @ +105°C

Polarity Polarized (long lead = +, short lead = −)

Mounting Through-Hole (THT), Radial

Note on ripple current variance: Datasheets for this exact size/rating show a real spread — one manufacturer's "anti-lightning" long-life series rates it at 193mA, while another's standard series rates 335mA @ 100kHz. This is normal supplier-to-supplier variance for the same nominal size; worth confirming against your specific batch's datasheet if ripple current matters for the customer's application.

Applications

• SMPS input/output filtering on 300–400V DC rails

• LED driver and ballast circuits

• Bulk energy storage / snubber stages in high-voltage power supplies

• Industrial and outdoor power supply filtering (some variants rated for lightning-surge resistance)

Safety Cautions

• Polarized part — reverse connection can cause venting or explosive failure.

• Never exceed the 400V rating, including transient spikes.

• Discharge before handling; 400V rated caps can retain a lethal charge after power-off.

• Keep within rated ripple current to avoid internal heating and premature failure.