ALA7DF681DF450 Equivalent & Substitute Parts

Part Overview

The ALA7DF681DF450 is a 680 µF, 450 V aluminum electrolytic capacitor manufactured by KEMET in the ALA7D series. This radial, can-style snap-in capacitor is designed for through-hole mounting and is rated for automotive applications under AEC-Q200 standards. The part is currently active in production with 1,044 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring identical or compatible electrical and mechanical characteristics.

Substiute Parts

ALA7DF681DF450

KEMETIn Stock: 1055ALA7DF681DF450 Datasheet

Current PartRFQ

ALA7DA681DF450

KEMETIn Stock: 912ALA7DA681DF450 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ALA7DF681DF450 are identified based on strict parametric equivalence in the following critical categories:

Electrical Parameters (Must Match):

• Capacitance: 680 µF
• Voltage Rating: 450 V
• Tolerance: ±20%
• ESR @ 100 Hz: 227.8 mOhm
• Lifetime @ Temperature: 15,000 Hrs @ 85°C
• Operating Temperature Range: -40°C ~ 85°C
• Polarization: Polar

Mechanical Parameters (Must Match):

• Package / Case: Radial, Can - Snap-In
• Mounting Type: Through Hole
• Size / Dimension: 1.378" Dia (35.00 mm)
• Height - Seated (Max): 2.047" (52.00 mm)

Compliance & Ratings (Must Match):

• AEC-Q200 Automotive Rating
• RoHS3 Compliance
• REACH Unaffected Status

The ALA7DA681DF450 qualifies as a parametric equivalent substitute based on matching all critical electrical, mechanical, and compliance parameters. Both parts belong to the KEMET ALA7D series and share identical capacitance, voltage rating, tolerance, ESR, lifetime rating, operating temperature range, package style, and physical dimensions. Both are AEC-Q200 rated and RoHS3 compliant.

Parameter Comparison

Engineering Selection Recommendations

Both the ALA7DF681DF450 and ALA7DA681DF450 are active production parts manufactured by KEMET with full AEC-Q200 automotive qualification and RoHS3 compliance. Selection between these parts is based on the following engineering criteria:

Primary Selection Criteria:

1. Electrical Equivalence: Both parts deliver identical capacitance (680 µF), voltage rating (450 V), tolerance (±20%), and ESR (227.8 mOhm @ 100 Hz). Both meet the same lifetime specification of 15,000 hours at 85°C and operate across the identical temperature range of -40°C to 85°C.

2. Mechanical Compatibility: Both parts are packaged as radial, can-style snap-in capacitors with through-hole mounting. Physical dimensions are identical: 1.378" diameter (35.00 mm) and 2.047" maximum seated height (52.00 mm). Direct board-level substitution is supported without layout modification.

3. Compliance & Ratings: Both parts carry AEC-Q200 automotive qualification, ROHS3 compliance, and REACH unaffected status. Both are suitable for automotive applications requiring these certifications.

4. Performance Variations: The ALA7DA681DF450 exhibits lower ripple current ratings (1.9 A @ 100 Hz and 3.7 A @ 10 kHz compared to 2.39 A and 5.46 A respectively) and higher impedance (567.8 mOhms versus 426 mOhms). These variations reflect internal design differences within the ALA7D series but do not affect parametric equivalence for standard capacitance, voltage, and tolerance specifications.

5. Inventory Availability: The ALA7DF681DF450 has 1,044 units in stock; the ALA7DA681DF450 has 899 units available. Selection may be influenced by procurement lead time and inventory requirements.

Frequently Asked Questions (FAQ)

Q: Can the ALA7DA681DF450 be used as a direct replacement for the ALA7DF681DF450?

A: Yes. Both parts are parametric equivalents with matching capacitance (680 µF), voltage rating (450 V), tolerance (±20%), ESR (227.8 mOhm @ 100 Hz), lifetime (15,000 Hrs @ 85°C), operating temperature range (-40°C ~ 85°C), and physical dimensions (1.378" Dia × 2.047" Height). Both are AEC-Q200 rated and RoHS3 compliant. Direct board-level substitution is supported without design modification.

Q: What are the differences between these two parts?

A: The primary differences are ripple current ratings and impedance. The ALA7DF681DF450 provides higher ripple current capacity (2.39 A @ 100 Hz and 5.46 A @ 10 kHz) and lower impedance (426 mOhms) compared to the ALA7DA681DF450 (1.9 A @ 100 Hz, 3.7 A @ 10 kHz, and 567.8 mOhms impedance). These variations reflect internal design differences but do not affect the core electrical specifications for capacitance, voltage, tolerance, or ESR.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the ALA7DF681DF450 and ALA7DA681DF450 carry AEC-Q200 automotive qualification and are RoHS3 compliant. Both are approved for automotive applications.

Q: What is the physical package style for these capacitors?

A: Both parts are radial, can-style snap-in aluminum electrolytic capacitors designed for through-hole mounting. Physical dimensions are identical: 1.378" diameter (35.00 mm) and 2.047" maximum seated height (52.00 mm). Both use snap-in terminals for PCB mounting.

Q: Do these parts have the same operating temperature range?

A: Yes. Both the ALA7DF681DF450 and ALA7DA681DF450 operate across the identical temperature range of -40°C to 85°C with a rated lifetime of 15,000 hours at 85°C.

Q: Which part should I select if both are available?

A: Selection depends on application ripple current requirements. If your circuit requires higher ripple current handling (2.39 A @ 100 Hz or 5.46 A @ 10 kHz), select the ALA7DF681DF450. If ripple current requirements are lower (1.9 A @ 100 Hz or 3.7 A @ 10 kHz), either part is suitable. Both meet identical core specifications for capacitance, voltage, tolerance, ESR, and lifetime.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts are AEC-Q200 rated, RoHS3 compliant, and REACH unaffected. Both carry identical compliance and certification status.