337KBM100MSQ Equivalent & Substitute Parts Reference

Part Overview

The 337KBM100MSQ is a 330 µF, 100 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the KBM series. This radial, through-hole component is designed for general-purpose applications requiring stable capacitance and extended operational life. The part maintains Active product status with full RoHS3 compliance and REACH unaffected designation. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Key Parameters

Parameter	Specification
Capacitance	330 µF
Voltage Rating	100 V
Tolerance	±20%
Operating Temperature Range	-40°C to 105°C
Lifetime at Temperature	10000 Hrs @ 105°C
Polarization	Polar
Mounting Type	Through Hole
Package Type	Radial, Can
Lead Spacing	0.295" (7.50 mm)
Case Diameter	0.630" (16.00 mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 337KBM100MSQ is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 100 V (exact match required)
Tolerance: ±20% (exact match required)
Operating Temperature Range: -40°C to 105°C (exact match required)
Lifetime: 10000 Hrs @ 105°C (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)
Lead Spacing: 0.295" (7.50 mm) (exact match required)
Case Diameter: 0.630" (16.00 mm) (exact match required)
Compliance: RoHS3 Compliant, REACH Unaffected (exact match required)

All identified substitute parts meet these mandatory criteria. Variations in ESR, impedance, and ripple current ratings are permissible within the scope of general-purpose applications, provided the core electrical and mechanical specifications remain equivalent.

Parameter Comparison

Parameter	337KBM100MSQ (Cornell Dubilier)	EKY-101ELL331ML25S (Chemi-Con)	EKYB101ELL331ML25S (Chemi-Con)	100YXJ330M16X25 (Rubycon)
Capacitance	330 µF	330 µF	330 µF	330 µF
Voltage Rating	100 V	100 V	100 V	100 V
Tolerance	±20%	±20%	±20%	±20%
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Lifetime @ 105°C	10000 Hrs	10000 Hrs	10000 Hrs	10000 Hrs
Polarization	Polar	Polar	Polar	Polar
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package Type	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Lead Spacing	0.295" (7.50 mm)	0.295" (7.50 mm)	0.295" (7.50 mm)	0.295" (7.50 mm)
Case Diameter	0.630" (16.00 mm)	0.630" (16.00 mm)	0.630" (16.00 mm)	0.630" (16.00 mm)
Height (Max)	1.063" (27.00 mm)	1.043" (26.50 mm)	1.043" (26.50 mm)	1.063" (27.00 mm)
ESR @ 120 Hz	402 mOhm	Not specified	Not specified	Not specified
Impedance	Not specified	38 mOhms	28 mOhms	44 mOhms
Ripple Current @ 120 Hz	650 mA	850 mA	1.125 A	1.547 A
Ripple Current @ 100 kHz	1.3 A	1.7 A	2.25 A	2.21 A
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All three substitute parts—EKY-101ELL331ML25S, EKYB101ELL331ML25S, and 100YXJ330M16X25—are electrically and mechanically equivalent to the 337KBM100MSQ and are suitable for direct substitution in general-purpose applications.

Compliance Basis: All parts maintain Active product status, RoHS3 compliance, and REACH unaffected designation. No regulatory or environmental restrictions apply to any substitute option.

Physical Compatibility: All substitute parts share identical lead spacing (0.295" / 7.50 mm), case diameter (0.630" / 16.00 mm), and mounting type (through-hole radial). Height variations between 1.043" (26.50 mm) and 1.063" (27.00 mm) are within standard PCB layout tolerances for radial capacitor footprints.

Electrical Equivalence: All parts deliver the specified 330 µF capacitance at 100 V with ±20% tolerance, -40°C to 105°C operating range, and 10000-hour lifetime at 105°C. Ripple current ratings across all substitutes meet or exceed the original specification, providing equivalent or improved performance margins in ripple-sensitive applications.

Selection Criteria: Component selection should be based on inventory availability, lead time, and procurement cost. All parts are functionally interchangeable within the specified electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can EKY-101ELL331ML25S be used as a direct replacement for 337KBM100MSQ?

A: Yes. EKY-101ELL331ML25S meets all mandatory electrical and mechanical parameters: 330 µF capacitance, 100 V rating, ±20% tolerance, -40°C to 105°C operating range, 10000-hour lifetime at 105°C, through-hole radial mounting, 0.295" lead spacing, and 0.630" case diameter. RoHS3 and REACH compliance are equivalent.

Q: What is the difference between EKYB101ELL331ML25S and EKY-101ELL331ML25S?

A: Both are Chemi-Con products with identical core specifications. EKYB101ELL331ML25S (KYB series) provides higher ripple current ratings (1.125 A @ 120 Hz, 2.25 A @ 100 kHz) and lower impedance (28 mOhms) compared to EKY-101ELL331ML25S (KY series, 850 mA @ 120 Hz, 1.7 A @ 100 kHz, 38 mOhms impedance). Both are electrically equivalent for general-purpose applications.

Q: Are there height differences between substitute parts and the original?

A: Yes. The 337KBM100MSQ and 100YXJ330M16X25 have maximum seated heights of 1.063" (27.00 mm), while EKY-101ELL331ML25S and EKYB101ELL331ML25S have maximum seated heights of 1.043" (26.50 mm). This 0.020" (0.50 mm) difference is within standard PCB layout tolerances for radial capacitor footprints and does not affect mechanical or electrical compatibility.

Q: Can I use 100YXJ330M16X25 (Rubycon) in place of the Cornell Dubilier part?

A: Yes. 100YXJ330M16X25 is parametrically equivalent across all mandatory specifications: 330 µF, 100 V, ±20% tolerance, -40°C to 105°C operating range, 10000-hour lifetime at 105°C, through-hole radial package, 0.295" lead spacing, and 0.630" case diameter. RoHS3 and REACH compliance are maintained.

Q: What parameters determine substitution eligibility?

A: Substitution is determined by exact equivalence in capacitance (330 µF), voltage rating (100 V), tolerance (±20%), operating temperature range (-40°C to 105°C), lifetime (10000 Hrs @ 105°C), polarization (polar), mounting type (through-hole), package type (radial can), lead spacing (0.295" / 7.50 mm), case diameter (0.630" / 16.00 mm), and regulatory compliance (RoHS3, REACH unaffected). Variations in ESR, impedance, and ripple current are permissible.

Q: Is inventory availability a factor in part selection?

A: Inventory levels are provided for reference: 337KBM100MSQ (912 pcs), EKY-101ELL331ML25S (2684 pcs), EKYB101ELL331ML25S (1313 pcs), and 100YXJ330M16X25 (1465 pcs). Selection should account for procurement lead time and supply chain requirements, as all parts are functionally equivalent.

Q: Do all substitute parts have the same ESR or impedance?

A: No. ESR and impedance values vary: 337KBM100MSQ specifies 402 mOhm ESR @ 120 Hz; EKY-101ELL331ML25S provides 38 mOhms impedance; EKYB101ELL331ML25S provides 28 mOhms impedance; 100YXJ330M16X25 provides 44 mOhms impedance. These variations are within acceptable ranges for general-purpose applications and do not affect substitution eligibility.

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