TAP686M020CCS Equivalent & Substitute Parts

Part Overview

The TAP686M020CCS is a 68 µF conformal coated tantalum capacitor rated at 20 V with ±20% tolerance, manufactured by KYOCERA AVX in the TAP series. This through-hole radial component features 900mOhm ESR and operates across -55°C to 125°C. The part is Active status and ROHS3 compliant, making it suitable for general-purpose applications requiring reliable energy storage in compact form factors.

Substitute parts are identified when design requirements allow for parameter flexibility within the electrical and mechanical constraints of the application circuit.

Substiute Parts

TAP686M020CCS

KYOCERA AVXIn Stock: 900TAP686M020CCS Datasheet

Current PartRFQ

TAP686K025CCS

KYOCERA AVXIn Stock: 1313TAP686K025CCS Datasheet

UpgradeRFQ

TAP686M025CCS

KYOCERA AVXIn Stock: 1221TAP686M025CCS Datasheet

UpgradeRFQ

TAP686M020HSB

KYOCERA AVXIn Stock: 978TAP686M020HSB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TAP686M020CCS is determined by the following criteria:

Electrical Compatibility: Capacitance value must remain 68 µF. Voltage rating may be equal or higher. Tolerance may vary within ±10% to ±20%. ESR values between 800mOhm and 900mOhm are acceptable.

Mechanical Compatibility: Package type must be radial through-hole. Physical dimensions (0.354" diameter, 0.630" height) must match. Lead spacing must accommodate 0.197" (5.00mm) or 0.250" (6.35mm) pitch depending on PCB layout.

Environmental & Compliance: Operating temperature range -55°C to 125°C, conformal coating type, ROHS3 compliance, and Active product status are required.

Identified Substitutes:

• TAP686K025CCS: Voltage upgrade (25V), improved tolerance (±10%), reduced ESR (800mOhm)
• TAP686M025CCS: Voltage upgrade (25V), same tolerance (±20%), reduced ESR (800mOhm)
• TAP686M020HSB: Identical electrical specs, alternate lead spacing (0.250" vs 0.197")

Parameter Comparison

Engineering Selection Recommendations

TAP686K025CCS serves as an upgrade substitute when circuit design permits higher voltage rating. The 25 V rating provides additional safety margin over the original 20 V specification. The ±10% tolerance offers tighter capacitance control compared to the ±20% of the original part. Reduced ESR (800mOhm vs 900mOhm) improves transient response characteristics. Lead spacing remains 0.197" (5.00mm), ensuring direct PCB compatibility. All compliance certifications (ROHS3, REACH Unaffected) and Active product status are maintained.

TAP686M025CCS provides voltage upgrade capability while maintaining the original ±20% tolerance specification. The 25 V rating increases design margin. ESR reduction to 800mOhm improves performance. Lead spacing compatibility (0.197") is preserved. This substitute is appropriate when voltage headroom is desired without requiring tighter tolerance control.

TAP686M020HSB is the manufacturer-recommended equivalent with identical electrical specifications (20 V, ±20%, 900mOhm ESR). The primary difference is lead spacing at 0.250" (6.35mm) versus the original 0.197" (5.00mm). This substitute requires PCB layout verification to confirm lead spacing accommodation. All other mechanical and environmental parameters remain identical.

Frequently Asked Questions (FAQ)

Q: Can TAP686K025CCS replace TAP686M020CCS in any application? A: TAP686K025CCS is electrically compatible as a direct substitute. The higher 25 V rating is backward-compatible with 20 V circuit requirements. Verify PCB layout accommodates the 0.197" (5.00mm) lead spacing. The tighter ±10% tolerance may improve circuit performance but is not required for compatibility.

Q: What is the difference between TAP686M025CCS and TAP686K025CCS? A: Both parts share 25 V rating, 68 µF capacitance, 800mOhm ESR, and 0.197" lead spacing. The primary difference is tolerance: TAP686K025CCS offers ±10% while TAP686M025CCS offers ±20%. Selection depends on circuit tolerance requirements.

Q: Can TAP686M020HSB be used as a direct drop-in replacement? A: TAP686M020HSB matches all electrical specifications of the original part. However, lead spacing differs at 0.250" (6.35mm) versus 0.197" (5.00mm). PCB layout must be verified to confirm the wider lead spacing is compatible with existing pad patterns.

Q: Are all substitute parts ROHS3 compliant? A: Yes. TAP686K025CCS, TAP686M025CCS, and TAP686M020HSB are all ROHS3 compliant and REACH Unaffected, matching the compliance status of TAP686M020CCS.

Q: What happens if I use a 25 V rated part in a 20 V circuit? A: Using a higher voltage-rated capacitor in a lower voltage application is electrically safe and common practice. The 25 V parts (TAP686K025CCS and TAP686M025CCS) will operate reliably in 20 V circuits with no performance degradation.

Q: Does ESR difference affect circuit performance? A: ESR reduction from 900mOhm to 800mOhm improves transient response and reduces heat generation. This is beneficial in high-frequency or high-current applications but may not be critical in general-purpose circuits. Verify application requirements before selection.