SMQ400VS331M22X50T2 Equivalent & Substitute Parts

Part Overview

The SMQ400VS331M22X50T2 is a 330 µF, 400 V aluminum electrolytic capacitor manufactured by Chemi-Con in the SMQ series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring high voltage energy storage and filtering. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new designs.

Substiute Parts

SMQ400VS331M22X50T2

Chemi-ConIn Stock: 764SMQ400VS331M22X50T2 Datasheet

Current PartRFQ

ESMQ401VSN331MP50S

Chemi-ConIn Stock: 1137ESMQ401VSN331MP50S Datasheet

SimilarRFQ

380LQ331M400H052

Cornell Dubilier Electronics (CDE)In Stock: 755380LQ331M400H052 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMQ400VS331M22X50T2 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 330 µF (exact match required)
• Voltage Rating: 400 V (exact match required)
• Tolerance: ±20% (exact match required)
• Polarization: Polar (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package Style: Radial, Can - Snap-In (exact match required)
• Lead Spacing: 10.00 mm (exact match required)
• Operating Temperature Range: -25°C to 85°C (exact match required)
• Lifetime: 2000 Hrs @ 85°C (exact match required)

Allowable Variation Parameters:

• ESR @ 120Hz: Substitute values must not exceed the original specification to ensure equivalent or superior performance
• Ripple Current: Substitute values must meet or exceed original specifications
• Physical Dimensions (Diameter, Height): Minor variations acceptable within mechanical envelope constraints
• RoHS/REACH Compliance: Substitutes may have improved compliance status
• Product Status: Active substitutes preferred over obsolete originals

Two substitute parts meet these criteria and are documented in this reference.

Parameter Comparison

Engineering Selection Recommendations

ESMQ401VSN331MP50S (Chemi-Con)

This substitute maintains identical electrical specifications to the original SMQ400VS331M22X50T2 across all critical parameters: 330 µF capacitance, 400 V rating, ±20% tolerance, 2000 Hrs @ 85°C lifetime, and matching ripple current ratings. The part is active in production status, ensuring long-term availability. ESMQ401VSN331MP50S achieves RoHS compliance, addressing regulatory requirements for new designs and system upgrades. Physical dimensions are identical, guaranteeing direct mechanical compatibility. This part is the preferred substitute for applications requiring continuity with the original SMQ series design.

380LQ331M400H052 (Cornell Dubilier Electronics)

This substitute from CDE meets all mandatory electrical equivalence criteria: 330 µF capacitance, 400 V rating, ±20% tolerance, 2000 Hrs @ 85°C lifetime, and 1.9 A ripple current @ 120 Hz. The ESR specification of 603 mOhm @ 120Hz is lower than the original 754 mOhm, indicating superior performance characteristics. The part is active in production and ROHS3 compliant. Physical height is 52.00 mm compared to the original 50.00 mm; this 2 mm difference must be evaluated against available board space and mechanical constraints. High-frequency ripple current is specified at 2.66 A @ 20 kHz rather than 2.717 A @ 50 kHz; application-specific frequency requirements determine suitability. This substitute is suitable for designs where the increased height is accommodated and high-frequency performance at 20 kHz is acceptable.

Frequently Asked Questions (FAQ)

Q: Can ESMQ401VSN331MP50S directly replace SMQ400VS331M22X50T2 without circuit modification?

A: Yes. ESMQ401VSN331MP50S is electrically and mechanically equivalent across all critical parameters: capacitance, voltage rating, tolerance, lifetime, ripple current specifications, lead spacing, and mounting footprint. No circuit modifications are required. The substitute is pin-compatible and functionally identical.

Q: What is the significance of the ESR difference between the main part and 380LQ331M400H052?

A: The 380LQ331M400H052 has an ESR of 603 mOhm @ 120Hz compared to the original 754 mOhm. Lower ESR indicates reduced internal resistance and improved thermal performance under ripple current conditions. This is a performance advantage, not a limitation. Applications sensitive to ESR will benefit from this characteristic.

Q: Does the 2 mm height difference of 380LQ331M400H052 affect compatibility?

A: The 380LQ331M400H052 is 52.00 mm tall versus the original 50.00 mm. This 2 mm increase must be verified against available vertical clearance in the target application. If board-to-component spacing or enclosure height is constrained, this dimension difference may prevent direct substitution. Mechanical envelope validation is required before selection.

Q: Why is ESMQ401VSN331MP50S preferred over 380LQ331M400H052?

A: ESMQ401VSN331MP50S maintains identical physical dimensions to the original part, eliminating mechanical compatibility concerns. Both parts are electrically equivalent and active in production. ESMQ401VSN331MP50S is the preferred choice when mechanical constraints are strict or when maintaining exact form-factor compatibility is required.

Q: Are both substitutes suitable for new design applications?

A: Yes. Both ESMQ401VSN331MP50S and 380LQ331M400H052 are active production parts with current availability. Both meet RoHS compliance requirements for new designs. Selection between them depends on mechanical envelope constraints and high-frequency ripple current requirements specific to the application.

Q: What compliance advantages do the substitutes offer over the original SMQ400VS331M22X50T2?

A: The original part is RoHS non-compliant. ESMQ401VSN331MP50S achieves RoHS compliance, and 380LQ331M400H052 achieves ROHS3 compliance. Both substitutes satisfy regulatory requirements for products sold in markets with RoHS mandates. This compliance status is mandatory for new designs and system certifications.

Q: Can the substitutes be used in existing equipment containing the original SMQ400VS331M22X50T2?

A: Yes, both substitutes are electrically and mechanically compatible with applications designed for the original part. ESMQ401VSN331MP50S is the direct equivalent with identical dimensions. 380LQ331M400H052 requires verification of the 2 mm height increase against available space. Both substitutes maintain the same electrical performance envelope.