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4SW180M
Rubycon
CAP ALUM POLY 180UF 20% 4V SMD
1132 Pcs New Original In Stock
180 µF 4 V Aluminum - Polymer Capacitors 2917 (7343 Metric) 9mOhm 2000 Hrs @ 105°C
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5.0 / 5.0
- (307 Ratings)
4SW180M
Product Overview
7869544
DiGi Electronics Part Number
4SW180M-DGManufacturer
Rubycon
4SW180M
Description
CAP ALUM POLY 180UF 20% 4V SMDInventory
1132 Pcs New Original In Stock
180 µF 4 V Aluminum - Polymer Capacitors 2917 (7343 Metric) 9mOhm 2000 Hrs @ 105°C
Quantity
Minimum 1
Minimum 1
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4SW180M Technical Specifications
Category
Aluminum - Polymer Capacitors
Packaging
-
Series
PC-CON, SW
Product Status
Obsolete
Type
Polymer
Capacitance
180 µF
Tolerance
±20%
Voltage - Rated
4 V
ESR (Equivalent Series Resistance)
9mOhm
Lifetime @ Temp.
2000 Hrs @ 105°C
Operating Temperature
-55°C ~ 105°C
Ratings
-
Applications
General Purpose
Ripple Current @ High Frequency
3.5 A @ 100 kHz
Lead Spacing
-
Size / Dimension
0.287" L x 0.169" W (7.30mm x 4.30mm)
Height - Seated (Max)
0.114" (2.90mm)
Surface Mount Land Size
0.287" L x 0.169" W (7.30mm x 4.30mm)
Mounting Type
Surface Mount
Package / Case
2917 (7343 Metric)
Datasheet & Documents
Datasheets
Download 4SW180M Product Specification (PDF)
HTML Datasheet
4SW180M-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8532.22.0020
Additional Information
Other Names
1189-1636-6
1189-1636-1
1189-1636-2
Standard Package
2,000
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
Ich bin begeistert von der Kosteneffizienz bei DiGi Electronics und der benutzerfreundlichen Gestaltung der Webseite.
December 02, 2025
Der Checkout-Prozess war zügig, und ich konnte meine Bestellung ohne Verzögerung abschließen.
December 02, 2025
Bright, eco-conscious packaging made my unboxing a delightful experience, conveying quality from the start.
December 02, 2025
The quality of products from DiGi Electronics is always top-notch, exceeding expectations.
December 02, 2025
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Frequently Asked Questions (FAQ)
Can I safely replace the obsolete Rubycon 4SW180M polymer capacitor with a Panasonic EEF-SX0G181ER in a high-frequency DC-DC converter design operating at 1 MHz switching frequency?
Yes, the Panasonic EEF-SX0G181ER is a technically viable replacement for the Rubycon 4SW180M in high-frequency applications, but with important caveats. While both are 180 µF, 4V polymer capacitors with similar ESR (~9–10 mΩ), the EEF-SX0G181ER has a slightly larger footprint (7.3 mm x 4.3 mm vs. 7.3 mm x 4.3 mm nominal, but verify land pattern compatibility) and a lower rated ripple current (2.8 A @ 100 kHz vs. 3.5 A for the 4SW180M). At 1 MHz, actual ripple handling may differ due to frequency-dependent ESR behavior—bench validation under load is strongly recommended. Also, confirm thermal management, as sustained high ripple can cause localized heating even with low ESR. Always re-evaluate stability margins in your control loop, as capacitance vs. frequency roll-off characteristics may vary between manufacturers.
What are the key reliability risks when using the Rubycon 4SW180M in an industrial ambient environment with frequent thermal cycling between -40°C and 95°C?
The Rubycon 4SW180M, rated for -55°C to +105°C, can operate within this range, but frequent thermal cycling poses reliability risks due to CTE (coefficient of thermal expansion) mismatch between the polymer electrolyte, aluminum electrodes, and PCB. Over time, this can lead to increased ESR or intermittent connections, especially if the PCB lacks proper thermal relief or uses thin copper layers. Although the 2000-hour lifetime is rated at 105°C steady-state, thermal cycling accelerates fatigue beyond Arrhenius-based predictions. Mitigate risk by ensuring adequate pad design per IPC-7351, avoiding placement near high-heat components, and considering underfill or conformal coating in harsh environments. Monitor for ESR drift during burn-in testing.
How does the voltage derating strategy for the Rubycon 4SW180M compare to standard aluminum electrolytic capacitors in a 3.3V rail application with occasional 3.6V transients?
Unlike traditional aluminum electrolytics, polymer capacitors like the Rubycon 4SW180M exhibit more stable performance under light derating, but they still benefit from conservative voltage margins. Operating the 4SW180M at 3.3V nominal (82.5% of its 4V rating) with brief 3.6V transients (90% rating) is generally acceptable due to the robust oxide layer in polymer types. However, avoid sustained operation above 3.8V, as exceeding 95% of rated voltage accelerates oxide degradation, even in polymer designs. Compared to standard electrolytics—which often require 50% derating—the 4SW180M allows tighter design margins, but transient overshoots from inductive loads or hot-plug events must be clamped (e.g., with TVS diodes) to prevent cumulative damage.
Is the Rubycon 4SW180M suitable for parallel configuration to increase ripple current handling in a compact POL (point-of-load) regulator, and what layout pitfalls should I avoid?
Yes, the Rubycon 4SW180M can be used in parallel to boost ripple current capability, but layout symmetry is critical to prevent current imbalance. Place capacitors as close as possible with identical trace lengths and widths to the power and ground planes to ensure even current sharing. Avoid routing one capacitor’s path through vias while another uses direct plane connection, as this introduces parasitic inductance and resistance differences. Also, ensure the combined ripple current does not exceed the thermal limits of the PCB copper—each 4SW180M generates heat despite low ESR. Use thermal vias under each capacitor if stacking more than two. Finally, verify stability: parallel capacitors reduce total ESR, which may require adjusting compensation networks in voltage-mode controllers.
Given that the Rubycon 4SW180M is obsolete, what long-term sourcing and qualification steps should I take before redesigning a medical device power supply that currently uses it?
Since the Rubycon 4SW180M is obsolete, immediate action is required to avoid production disruptions. First, secure last-time buy inventory if feasible, but do not rely solely on it. Second, qualify the listed substitute—Panasonic EEF-SX0G181ER—under full operating conditions, including ripple stress, thermal cycling, and long-term bias testing (e.g., 1000+ hours at 105°C). Perform cross-correlation of impedance vs. frequency plots to ensure dynamic response matches. For medical applications, also validate biocompatibility of materials (though both are ROHS3 compliant) and update your device’s risk management file per ISO 14971. Consider dual-sourcing with a second alternate (e.g., United Chemi-Con APS series) and document all changes per your QMS. Never assume drop-in compatibility without empirical validation in the actual circuit.
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4SW180M CAD Models
Rubycon 4SW180M PCB symbols & footprints
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