ALC10A102DF250 Equivalent & Substitute Parts

Part Overview

The ALC10A102DF250 is a 1000 µF, 250 V aluminum electrolytic capacitor manufactured by KEMET in the ALC10 series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring high capacitance and voltage ratings in a compact through-hole package. The part is currently Active in product status and maintains 15000 hours of operational life at 85°C. Substitute parts are identified when equivalent electrical and mechanical parameters align with application requirements, particularly when inventory availability or specific performance characteristics necessitate alternative sourcing.

Substiute Parts

ALC10A102DF250

KEMETIn Stock: 1343ALC10A102DF250 Datasheet

Current PartRFQ

B43305A9108M000

EPCOS - TDK ElectronicsIn Stock: 273852B43305A9108M000 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ALC10A102DF250 are identified based on strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 1000 µF (exact match required)
• Tolerance: ±20% (acceptable variation range)
• Package / Case: Radial, Can - Snap-In (physical form factor)
• Lead Spacing: 10.00 mm (PCB footprint compatibility)
• Mounting Type: Through Hole (assembly compatibility)
• Operating Temperature Range: -40°C to 85°C (environmental envelope)
• Polarization: Polar (electrical polarity requirement)

Allowable Variation Parameters:

• Voltage - Rated: May exceed 250 V (higher voltage rating provides backward compatibility)
• ESR @ 100Hz: May be lower (improved performance characteristic)
• Lifetime @ 85°C: May be lower (acceptable if application does not require 15000 hours)

The substitute part B43305A9108M000 meets all mandatory matching criteria while providing a higher voltage rating (400 V) and lower ESR (140 mOhm), making it electrically compatible for applications designed for the ALC10A102DF250.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: ALC10A102DF250

The ALC10A102DF250 is the recommended choice for new designs. This part maintains Active product status, ensuring long-term availability and manufacturer support. The 15000-hour lifetime at 85°C provides extended operational reliability for applications requiring sustained performance over extended periods. ROHS3 compliance and REACH Unaffected status confirm regulatory alignment for current manufacturing standards.

Substitute Selection: B43305A9108M000

The B43305A9108M000 serves as an electrical and mechanical substitute when the primary part is unavailable. This part is designated "Not For New Designs," indicating it is available for legacy system support or temporary sourcing solutions only. The 400 V voltage rating provides margin above the 250 V requirement, and the 140 mOhm ESR offers improved ripple current performance compared to the main part's 163 mOhm ESR.

Critical Consideration:

The substitute part exhibits a reduced lifetime specification of 2000 hours at 85°C compared to the main part's 15000 hours. This 7.5-fold reduction in rated lifetime must be evaluated against application requirements. Applications demanding continuous operation or extended service intervals should prioritize the ALC10A102DF250. The substitute's 2 mm height reduction (50 mm vs. 52 mm) is mechanically compatible with standard through-hole PCB layouts.

Both parts maintain identical lead spacing (10.00 mm), package form factor (Radial, Can - Snap-In), and operating temperature range (-40°C to 85°C), ensuring direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can B43305A9108M000 be used as a direct replacement for ALC10A102DF250 in existing designs?

A: Yes, from an electrical and mechanical standpoint. Both parts share identical capacitance (1000 µF), tolerance (±20%), lead spacing (10.00 mm), package form factor (Radial, Can - Snap-In), and operating temperature range (-40°C to 85°C). The substitute's higher voltage rating (400 V vs. 250 V) and lower ESR (140 mOhm vs. 163 mOhm) are compatible with the original design requirements. However, the reduced lifetime specification (2000 hours vs. 15000 hours at 85°C) must be evaluated for applications requiring extended operational life.

Q: What is the significance of the voltage rating difference?

A: The ALC10A102DF250 is rated for 250 V, while the B43305A9108M000 is rated for 400 V. A higher voltage rating does not negatively affect performance in a 250 V application; it provides additional safety margin. The substitute can safely operate at or below 250 V without derating or performance degradation.

Q: Why does the substitute have a shorter lifetime specification?

A: The B43305A9108M000 specifies 2000 hours at 85°C compared to the main part's 15000 hours. This difference reflects the manufacturer's testing and rating methodology for the B43305 series. Applications requiring continuous operation or long-term reliability should prioritize the ALC10A102DF250. For applications with intermittent duty cycles or shorter service intervals, the substitute's lifetime may be acceptable.

Q: Are there physical compatibility concerns with the 2 mm height difference?

A: No. The substitute's seated height of 50.00 mm compared to the main part's 52.00 mm represents a 2 mm reduction. This difference is within typical PCB layout tolerances and does not create mechanical interference or clearance issues in standard through-hole applications. Both parts maintain the same 35.00 mm diameter and 10.00 mm lead spacing.

Q: What is the impact of the ESR difference on circuit performance?

A: The substitute's lower ESR (140 mOhm vs. 163 mOhm at 100 Hz) results in reduced impedance and improved ripple current handling. This is a performance enhancement that does not negatively affect circuits designed for the main part. The substitute's ripple current rating at 100 Hz is 3.38 A compared to the main part's 3.26 A, indicating improved current capacity.

Q: Why is the substitute marked "Not For New Designs"?

A: This designation indicates that the B43305A9108M000 is in a mature or declining phase of its product lifecycle. EPCOS - TDK Electronics recommends the ALC10A102DF250 or other current-generation alternatives for new product development. The substitute remains available for legacy system support, repair, and replacement applications where existing designs are already in production or field deployment.

Q: Are both parts RoHS compliant?

A: Yes. Both the ALC10A102DF250 and B43305A9108M000 are ROHS3 Compliant, confirming compliance with current Restriction of Hazardous Substances regulations. Both parts are also REACH Unaffected, indicating no regulatory restrictions on their use in current manufacturing environments.

Q: What is the lead spacing significance for PCB design?

A: Both parts share identical lead spacing of 10.00 mm (0.394 inches). This ensures that PCB footprints designed for the ALC10A102DF250 will accommodate the B43305A9108M000 without modification. Lead spacing is a critical parameter for through-hole component placement and soldering compatibility.