Equivalent & Substitute Parts for 35ST155MB33225

Part Overview

The 35ST155MB33225 is a 1.5 µF film capacitor rated for 35V DC, featuring acrylic metallized dielectric construction in a 1210 (3225 metric) surface mount package. This component is designed for DC link and DC filtering applications. The part is currently listed as obsolete, making identification of suitable substitutes essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Capacitance	1.5 µF
Tolerance	±20%
Voltage Rating (DC)	35V
Dielectric Material	Acrylic, Metallized
Operating Temperature Range	-55°C to 125°C
Package / Case	1210 (3225 Metric)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	4 (72 Hours)

Substitute Part Grouping Explanation

Substitution for the 35ST155MB33225 is based on strict electrical and mechanical parameter matching:

Critical Matching Parameters:

Capacitance value: 1.5 µF
Tolerance: ±20%
Voltage rating: 35V DC minimum
Dielectric type: Acrylic, Metallized
Package: 1210 (3225 Metric)
Mounting: Surface Mount
Temperature range: -55°C to 125°C
RoHS3 compliance

The substitute part 35MU155MB33225 meets all these criteria. The primary difference is the series designation (MU versus ST) and product status (Active versus Obsolete), with the MU series representing the current production equivalent.

Parameter Comparison

Parameter	35ST155MB33225 (Main)	35MU155MB33225 (Substitute)
Manufacturer	Rubycon	Rubycon
Series	PMLCAP®, ST	PMLCAP®, MU
Product Status	Obsolete	Active
Capacitance	1.5 µF	1.5 µF
Tolerance	±20%	±20%
Voltage Rating (DC)	35V	35V
Dielectric Material	Acrylic, Metallized	Acrylic, Metallized
Operating Temperature	-55°C to 125°C	-55°C to 125°C
Package / Case	1210 (3225 Metric)	1210 (3225 Metric)
Size / Dimension	0.126" L x 0.098" W (3.20mm x 2.50mm)	0.126" L x 0.098" W (3.20mm x 2.50mm)
Height - Seated (Max)	0.079" (2.00mm)	0.087" (2.20mm)
Mounting Type	Surface Mount	Surface Mount
Termination	Solder Pads	Solder Pads
Applications	DC Link, DC Filtering	DC Link, DC Filtering
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	4 (72 Hours)	4 (72 Hours)
REACH Status	REACH Unaffected	REACH Unaffected
Packaging	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

The 35MU155MB33225 is the direct active production equivalent of the obsolete 35ST155MB33225. Both parts are manufactured by Rubycon and share identical electrical specifications, dielectric composition, and thermal operating range. The substitute maintains full ROHS3 compliance and REACH unaffected status.

The primary distinction is product lifecycle status: the ST series is obsolete while the MU series is in active production. For new designs or ongoing procurement, the 35MU155MB33225 is the appropriate selection. The maximum seated height difference of 0.008" (0.20mm) is within typical PCB design tolerances for 1210 package components and does not affect functional performance in DC link and DC filtering applications.