SH331M016ST Equivalent & Substitute Parts Reference

Part Overview

The SH331M016ST is a 330 µF, 16 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, indicating it is no longer in active production. The SH series has been superseded by newer product lines with improved performance characteristics and extended operational lifetimes. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and optimize performance in applications requiring 330 µF capacitance at 16 V rated voltage.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Tolerance	±20%	—
Voltage - Rated	16	V
ESR (Equivalent Series Resistance)	720	mOhm @ 120Hz
Lifetime @ Temperature	2000	Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C	—
Lead Spacing	0.138"	(3.50 mm)
Diameter	0.315"	(8.00 mm)
Height - Seated (Max)	0.453"	(11.50 mm)
Mounting Type	Through Hole	—
Package / Case	Radial, Can	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SH331M016ST is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Matching Parameters:

Capacitance: 330 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: 16 V (exact match required)
Lead Spacing: 0.138" (3.50 mm) (exact match required)
Diameter: 0.315" (8.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)

Performance Parameters (Allowable Variation):

ESR: Substitute parts may have different ESR values provided they do not exceed application requirements
Lifetime @ 105°C: Substitute parts may have equal or extended lifetime ratings
Operating Temperature Range: Substitute parts may have equal or extended temperature ranges
Ripple Current: Substitute parts may have equal or higher ripple current ratings

All substitute parts listed maintain identical mechanical footprint and electrical interface compatibility with the original SH331M016ST, ensuring direct replacement capability in through-hole PCB applications.

Parameter Comparison

Parameter	SH331M016ST (Main)	SEK331M016ST	EEU-FC1C331	UHE1C331MPD	UPW1C331MPD
Manufacturer	CDE	CDE	Panasonic	Nichicon	Nichicon
Product Status	Obsolete	Active	Active	Not For New Designs	Not For New Designs
Capacitance	330 µF	330 µF	330 µF	330 µF	330 µF
Tolerance	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	16 V	16 V	16 V	16 V	16 V
ESR	720 mOhm @ 120Hz	720 mOhm	117 mOhms (Impedance)	130 mOhms (Impedance)	117 mOhms (Impedance)
Lifetime @ 105°C	2000 Hrs	2000 Hrs	2000 Hrs	7000 Hrs	3000 Hrs
Operating Temperature	-40°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 105°C
Lead Spacing	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)
Diameter	0.315" (8.00 mm)	0.315" (8.00 mm)	0.315" (8.00 mm)	0.315" (8.00 mm)	0.315" (8.00 mm)
Height - Seated (Max)	0.453" (11.50 mm)	0.433" (11.00 mm)	0.453" (11.50 mm)	0.453" (11.50 mm)	0.453" (11.50 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: SEK331M016ST

The SEK331M016ST is the direct upgrade path from the obsolete SH331M016ST. Both are manufactured by Cornell Dubilier Electronics, ensuring design continuity and material consistency. The SEK series maintains identical electrical specifications (330 µF, ±20%, 16 V, 720 mOhm ESR) and mechanical footprint. The SEK331M016ST is currently in active production status with 1599 units in stock, providing reliable supply chain availability. The extended operating temperature range (-55°C to 105°C) offers improved performance margin compared to the original -40°C specification. This part is the preferred choice for direct replacement in existing designs.

Secondary Recommendation: EEU-FC1C331

The EEU-FC1C331 from Panasonic Electronic Components is an active production alternative meeting all critical electrical and mechanical parameters. This part carries AEC-Q200 automotive qualification, indicating enhanced reliability testing and process controls. The Panasonic FC series demonstrates superior ripple current performance (360.8 mA @ 120 Hz and 555 mA @ 100 kHz) compared to the original specification. The extended operating temperature range (-55°C to 105°C) and 2000-hour lifetime at 105°C provide equivalent performance characteristics. This part is suitable for applications requiring automotive-grade reliability or where multi-source qualification is required.

Tertiary Options: UHE1C331MPD and UPW1C331MPD

Both Nichicon alternatives (UHE1C331MPD and UPW1C331MPD) meet all critical substitution parameters and are currently in stock. However, both are designated "Not For New Designs," indicating these series are in end-of-life phase. The UHE1C331MPD offers extended 7000-hour lifetime at 105°C, suitable for long-term reliability applications. The UPW1C331MPD provides 3000-hour lifetime with extended temperature range (-55°C to 105°C). These options are appropriate for legacy system maintenance or where existing design qualifications reference these specific part numbers.

Frequently Asked Questions (FAQ)

Q: Can the SEK331M016ST directly replace the SH331M016ST without PCB modification?

A: Yes. The SEK331M016ST maintains identical lead spacing (0.138" / 3.50 mm), diameter (0.315" / 8.00 mm), and mounting type (through hole radial). The maximum seated height of SEK331M016ST is 0.433" (11.00 mm) compared to 0.453" (11.50 mm) for the original, representing a 0.020" reduction that does not affect PCB layout compatibility. Direct substitution is possible without design changes.

Q: What is the difference between ESR and Impedance specifications listed for different manufacturers?

A: ESR (Equivalent Series Resistance) is typically measured at a specific frequency (120 Hz for the SH331M016ST). Impedance is a broader measurement encompassing both resistive and reactive components across a frequency range. The EEU-FC1C331 lists impedance of 117 mOhms, which is lower than the original 720 mOhm ESR specification, indicating superior high-frequency performance. Both measurements are valid; impedance values generally indicate better performance characteristics at higher frequencies.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (SEK331M016ST, EEU-FC1C331, UHE1C331MPD, and UPW1C331MPD) are ROHS3 compliant, meeting current environmental and hazardous substance restrictions. The original SH331M016ST is also ROHS3 compliant.

Q: Which substitute part should be selected for new product designs?

A: The SEK331M016ST is the recommended choice for new designs. It is in active production status, manufactured by the same supplier as the original part, and provides identical electrical performance with extended operating temperature range. The EEU-FC1C331 is an alternative for designs requiring automotive-grade qualification (AEC-Q200). Both UHE1C331MPD and UPW1C331MPD are designated "Not For New Designs" and should not be selected for new product development.

Q: What is the significance of the "Not For New Designs" status?

A: This designation indicates the manufacturer is discontinuing the product line and recommends against using these parts in new designs. While the parts remain functionally equivalent and are currently in stock, they represent end-of-life products. Using these parts in new designs may result in future supply unavailability or extended lead times. The SEK331M016ST or EEU-FC1C331 are preferred alternatives for new development.

Q: Can the EEU-FC1C331 be used in general-purpose applications, or is it limited to automotive use?

A: The EEU-FC1C331 is qualified for automotive applications (AEC-Q200) but is fully suitable for general-purpose applications. AEC-Q200 qualification represents enhanced reliability testing and process controls that exceed general-purpose requirements. This part can be used in any application where the SH331M016ST was previously specified.

Q: How do the ripple current ratings affect component selection?

A: Ripple current ratings indicate the maximum AC current the capacitor can handle at specified frequencies without exceeding temperature limits. The original SH331M016ST specifies 285 mA @ 120 Hz and 342 mA @ 10 kHz. The EEU-FC1C331 provides higher ripple current capability (360.8 mA @ 120 Hz and 555 mA @ 100 kHz), indicating superior performance in high-ripple-current applications. If the application requires ripple current handling above the original specification, the EEU-FC1C331 or UHE1C331MPD are preferred selections.

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