SMG100VB331M12X25LL Equivalent & Substitute Parts

Part Overview

The SMG100VB331M12X25LL is a 330 µF, 100 V aluminum electrolytic capacitor manufactured by Chemi-Con in the SMG series. This radial, through-hole component is rated for 2000 hours at 85°C and is designed for general-purpose applications. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing maintenance, repair, and legacy system support. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct replacement without circuit redesign.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	100 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Lead Spacing	0.197" (5.00 mm)
Diameter	0.492" (12.50 mm)
Height	0.984" (25.00 mm)
Mounting Type	Through Hole
Package Type	Radial, Can
Polarization	Polar

Substitute Part Grouping Explanation

Substitution of the SMG100VB331M12X25LL is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

Capacitance: 330 µF (exact match required)
Voltage Rating: 100 V (exact match required)
Tolerance: ±20% (exact match required)
Lifetime: 2000 Hrs @ 85°C (exact match required)
Operating Temperature: -40°C ~ 85°C (exact match required)

Mechanical Compatibility Requirements:

Lead Spacing: 0.197" (5.00 mm) (exact match required)
Diameter: 0.492" (12.50 mm) (exact match required)
Height: Maximum 1.063" (27.00 mm) (allows minor height variation within PCB clearance limits)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)

All substitute parts listed below meet these criteria. Height variations up to 1.063" are acceptable as they remain within standard through-hole PCB mounting tolerances for radial capacitors of this diameter.

Parameter Comparison

Parameter	SMG100VB331M12X25LL (Main)	ESMG101ELL331MK25S	UFW2A331MHD	UKW2A331MHD	ECA-2AM331
Manufacturer	Chemi-Con	Chemi-Con	Nichicon	Nichicon	Panasonic
Series	SMG	SMG	UFW	UKW	M-A
Capacitance	330 µF	330 µF	330 µF	330 µF	330 µF
Voltage Rating	100 V	100 V	100 V	100 V	100 V
Tolerance	±20%	±20%	±20%	±20%	±20%
Lifetime @ 85°C	2000 Hrs	2000 Hrs	2000 Hrs	2000 Hrs	2000 Hrs
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Lead Spacing	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)
Diameter	0.492" (12.50 mm)	0.492" (12.50 mm)	0.492" (12.50 mm)	0.492" (12.50 mm)	0.492" (12.50 mm)
Height (Max)	0.984" (25.00 mm)	1.043" (26.50 mm)	0.984" (25.00 mm)	0.984" (25.00 mm)	1.063" (27.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package Type	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Product Status	Obsolete	Active	Not For New Designs	Not For New Designs	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Active Product Status):

ESMG101ELL331MK25S (Chemi-Con) and ECA-2AM331 (Panasonic) are the preferred substitutes. Both parts are classified as active products with full ROHS3 compliance. ESMG101ELL331MK25S maintains the same manufacturer lineage as the original SMG100VB331M12X25LL, offering continuity in design characteristics. ECA-2AM331 provides an alternative from Panasonic with equivalent electrical and mechanical specifications. Both parts are suitable for new designs and ongoing production support.

Secondary Substitutes (Not For New Designs):

UFW2A331MHD (Nichicon) and UKW2A331MHD (Nichicon) are classified as "Not For New Designs" but remain electrically and mechanically equivalent. These parts are suitable for legacy system repairs and maintenance where the original SMG100VB331M12X25LL is unavailable. Both Nichicon parts carry ROHS3 compliance and maintain identical electrical performance specifications.

Compliance Consideration:

The original SMG100VB331M12X25LL is RoHS non-compliant. All listed substitutes are ROHS3 compliant, meeting current environmental and regulatory requirements for component procurement and assembly.

Frequently Asked Questions (FAQ)

Q: Can ESMG101ELL331MK25S directly replace SMG100VB331M12X25LL without PCB modification?

A: Yes. ESMG101ELL331MK25S is mechanically and electrically equivalent. The height difference (26.50 mm vs. 25.00 mm) is within standard through-hole PCB clearance tolerances for radial capacitors of 12.50 mm diameter. No PCB redesign is required.

Q: What is the difference between the Chemi-Con and Panasonic substitutes?

A: Both ESMG101ELL331MK25S and ECA-2AM331 meet identical electrical and mechanical specifications. The primary difference is manufacturer. ESMG101ELL331MK25S maintains Chemi-Con lineage; ECA-2AM331 is from Panasonic. Both are active products with ROHS3 compliance.

Q: Why are UFW2A331MHD and UKW2A331MHD marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued these series for new product development. However, they remain electrically and mechanically equivalent and are suitable for legacy system repairs and maintenance applications.

Q: Are there any ripple current differences between substitutes?

A: Ripple current specifications vary slightly between manufacturers. The main part specifies 760 mA @ 120 Hz and 1.14 A @ 100 kHz. Substitute parts specify 700–750 mA @ 120 Hz and 1.125–1.19 A at their respective high frequencies. These variations are within acceptable engineering tolerances for general-purpose applications.

Q: What is the maximum height variation allowed for PCB compatibility?

A: The original part height is 0.984" (25.00 mm). Substitute parts range up to 1.063" (27.00 mm). This 0.079" (2.00 mm) variation is acceptable for standard through-hole radial capacitor mounting, provided PCB clearance above the component allows for the taller height.

Q: Are all substitutes available in the same packaging format?

A: All substitutes are supplied in bulk packaging and are through-hole radial components. The original SMG100VB331M12X25LL packaging format is not specified in the provided data; however, all substitutes are compatible with standard through-hole PCB assembly processes.

Q: Which substitute should be selected for new designs?

A: ESMG101ELL331MK25S or ECA-2AM331 are recommended for new designs, as both are classified as active products. UFW2A331MHD and UKW2A331MHD should not be used for new designs per manufacturer designation.

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