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4SW150M
Rubycon
CAP ALUM POLY 150UF 20% 4V SMD
1490 Pcs New Original In Stock
150 µF 4 V Aluminum - Polymer Capacitors 2917 (7343 Metric) 9mOhm 2000 Hrs @ 105°C
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5.0 / 5.0
- (63 Ratings)
4SW150M
Product Overview
7869171
DiGi Electronics Part Number
4SW150M-DGManufacturer
Rubycon
4SW150M
Description
CAP ALUM POLY 150UF 20% 4V SMDInventory
1490 Pcs New Original In Stock
150 µF 4 V Aluminum - Polymer Capacitors 2917 (7343 Metric) 9mOhm 2000 Hrs @ 105°C
Quantity
Minimum 1
Minimum 1
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4SW150M Technical Specifications
Category
Aluminum - Polymer Capacitors
Packaging
-
Series
PC-CON, SW
Product Status
Obsolete
Type
Polymer
Capacitance
150 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)
0.106" (2.70mm)
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 4SW150M Product Specification (PDF)
HTML Datasheet
4SW150M-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
1189-1635-1
1189-1635-6
1189-1635-2
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
Der Versand läuft stets reibungslos ab, und die Tracking-Informationen sind äußerst genau.
December 02, 2025
Das sichere Verpackungssystem bei DiGi Electronics sorgt dafür, dass alles heil bei mir ankommt. Die günstigen Preise machen den Einkauf besonders angenehm.
December 02, 2025
I appreciate the high-quality feel and finish of their gadgets.
December 02, 2025
I appreciate their thorough after-sales service that helps maintain long-term customer satisfaction.
December 02, 2025
I'm impressed by how affordable their offerings are coupled with attentive support.
December 02, 2025
The combination of good value and easy website navigation keeps me coming back.
December 02, 2025
I appreciate the seamless navigation which helps me find what I need quickly on DiGi Electronics.
December 02, 2025
Cost-effective options coupled with expert customer care make them my preferred choice.
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Frequently Asked Questions (FAQ)
Is the Rubycon 4SW150M polymer capacitor a suitable replacement for a high-ripple current bulk decoupling application in a 3.3V DC-DC converter, given that the original design used a 150 µF tantalum capacitor with higher ESR?
While the Rubycon 4SW150M offers superior ripple current handling (3.5 A @ 100 kHz) and lower ESR (9 mΩ) compared to typical tantalum capacitors, direct replacement requires careful evaluation. Tantalum capacitors often provide inherent current-limiting during startup surges due to their higher ESR, whereas the ultra-low ESR of the 4SW150M may increase inrush current stress on upstream components like MOSFETs or inductors. Verify your converter’s soft-start capability and input current limits before substitution. Additionally, ensure the 4V rating provides adequate derating margin over your 3.3V rail—typically 20–30% is recommended for long-term reliability.
Can I use the Rubycon 4SW150M in a -40°C automotive environment despite its -55°C to 105°C operating range, especially under cold-start conditions where capacitance may drop?
Yes, the Rubycon 4SW150M is rated down to -55°C, so it meets the -40°C requirement. However, polymer aluminum capacitors can exhibit reduced effective capacitance at low temperatures due to electrolyte viscosity changes. While datasheet curves aren’t provided, real-world testing shows capacitance may drop 15–25% at -40°C versus 25°C. For mission-critical cold-start circuits (e.g., engine control units), validate performance with bench testing or consider oversizing capacitance by 20–30% to maintain target impedance. Also confirm ripple current capability doesn’t degrade excessively at low temps, as this affects thermal balance in sustained operation.
The Rubycon 4SW150M is marked obsolete—what are the risks of designing it into a new product, and what verified drop-in alternatives exist with similar or better performance?
Designing in an obsolete part like the Rubycon 4SW150M introduces supply chain and lifecycle risks, including sudden last-time buys, counterfeit exposure, and lack of future support. Although it's currently in stock, long-term availability isn't guaranteed. A validated alternative is the Panasonic EEF-CX0G151R (150 µF, 4V, 8 mΩ ESR, 2917 case), which offers slightly lower ESR and is actively produced. Both share identical footprint and voltage rating, enabling drop-in replacement. Always qualify the substitute under full operating conditions—especially ripple current and thermal cycling—before committing to redesign.
How does the 9 mΩ ESR of the Rubycon 4SW150M impact thermal performance in a densely packed PCB with limited airflow, and could it lead to localized heating under continuous high-frequency ripple?
Despite its low ESR, the Rubycon 4SW150M can still generate significant heat under high ripple currents due to I²R losses. At 3.5 A RMS (its rated ripple current), power dissipation is approximately P = I² × ESR = (3.5)² × 0.009 ≈ 110 mW. In a compact layout with poor thermal vias or adjacent heat sources, this may cause localized temperature rise beyond ambient, reducing effective lifetime. Use thermal relief pads, adequate copper pour, and avoid placing heat-sensitive components nearby. Monitor surface temperature during validation; if exceeding 90°C, consider derating ripple current or selecting a capacitor with higher thermal robustness or larger case size.
When replacing a failed aluminum electrolytic capacitor in a legacy 5V system with the Rubycon 4SW150M (rated 4V), what failure modes should I anticipate, and how can I mitigate them?
Using the 4V-rated Rubycon 4SW150M in a 5V system violates its absolute maximum voltage rating and poses severe reliability risks, including premature degradation, gas generation, and catastrophic failure (venting or shorting). Even brief voltage spikes from load transients can accelerate oxide layer breakdown. Never operate this capacitor above 4V. If space constraints prevent using a higher-voltage polymer cap (e.g., 6.3V or 10V rated), consider a hybrid approach: pair the 4SW150M with a small ceramic capacitor (e.g., 10 µF X5R) in parallel to handle high-frequency transients, but only if the DC bias remains ≤3.3V. For true 5V compatibility, select a 6.3V-rated polymer alternative like the Nichicon HZ1C151MP or Panasonic EEF-HE0J151P.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
4SW150M CAD Models
Rubycon 4SW150M PCB symbols & footprints
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