Equivalent & Substitute Parts: 168682K400C-F

Part Overview

The Cornell Dubilier Electronics model 168682K400C-F is a 6800 pF radial film capacitor rated for 400V DC operation with polyester metallized dielectric. This component is classified as Active and remains in production. Film capacitors of this specification are used in general-purpose applications requiring stable capacitance over a wide operating temperature range (-55°C to 125°C). Substitute parts are necessary when primary inventory is unavailable, when alternate certifications or enhanced tolerance specifications are required, or when alternative thermal or mechanical profiles better suit specific circuit board layouts.

Substiute Parts

168682K400C-F

Cornell Dubilier Electronics (CDE)In Stock: 818168682K400C-F Datasheet

Current PartRFQ

B32529C6682J000

EPCOS - TDK ElectronicsIn Stock: 97709B32529C6682J000 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 168682K400C-F is determined by strict alignment of electrical and mechanical parameters. Both the main part and acceptable substitutes must satisfy the following criteria:

• Capacitance Value: 6800 pF (exact match required)
• Voltage Rating (DC): 400V minimum
• Voltage Rating (AC): 200V minimum
• Dielectric Type: Polyester metallized film
• Temperature Range: -55°C to 125°C minimum
• Mounting Configuration: Through-hole, radial leads
• Lead Spacing: 0.197" (5.00mm)
• Termination Style: PC pins

The substitute part B32529C6682J000 meets all electrical requirements and maintains mechanical compatibility. The primary difference is tolerance specification (±5% versus ±10%), which represents an upgrade in capacitance accuracy. Physical dimensions differ slightly; the substitute is more compact. Both parts are ROHS3 compliant and rated for automotive applications.

Parameter Comparison

Engineering Selection Recommendations

168682K400C-F (Cornell Dubilier Electronics): Select this part when existing board layouts are constrained by the specified dimensions (0.283" × 0.138" × 0.295" seated height) or when ±10% capacitance tolerance satisfies circuit requirements. This part is ROHS3 compliant and MSL 1 rated for unlimited shelf life without moisture control.

B32529C6682J000 (EPCOS - TDK Electronics): Select this substitute when tighter capacitance tolerance (±5%) is required for circuit performance. This part occupies less board area (0.287" × 0.098" × 0.256" seated height), making it suitable for space-constrained designs. The substitute is ROHS3 compliant and maintains AEC-Q200 automotive qualification. Both parts carry identical voltage ratings and operating temperature specifications.

Frequently Asked Questions (FAQ)

Q: Can the B32529C6682J000 directly replace the 168682K400C-F on existing circuit boards? A: Yes, with layout verification. Both parts maintain identical lead spacing (0.197" / 5.00mm) and radial through-hole termination. The substitute is physically more compact (narrower and shorter), which may require verification of board footprint clearance, particularly for vertical component spacing. Electrical performance is equivalent across the specified operating range.

Q: What is the significance of the ±5% versus ±10% tolerance difference? A: Tolerance defines the allowable variation of capacitance from the nominal 6800 pF value. The 168682K400C-F allows variation of ±680 pF (6120–7480 pF range). The B32529C6682J000 restricts variation to ±340 pF (6460–7140 pF range). Select the tighter tolerance part when circuit performance depends on precise capacitance values; use the wider tolerance part when the application allows greater capacitance variation.

Q: Are both parts suitable for automotive applications? A: The 168682K400C-F is rated for general-purpose applications. The B32529C6682J000 is explicitly qualified to AEC-Q200 automotive standards. If automotive compliance or reliability qualifications are circuit requirements, the substitute is the appropriate selection.

Q: Does the compact size of the B32529C6682J000 affect electrical performance? A: No. Electrical characteristics (capacitance, voltage rating, operating temperature, dielectric properties) are independent of physical dimensions. The more compact profile results from improved manufacturing efficiency and stacked dielectric construction. Electrical performance is equivalent across rated voltage and temperature ranges.

Q: What is the MSL rating difference between these parts? A: The 168682K400C-F is MSL 1 (Unlimited), requiring no moisture-controlled storage. The B32529C6682J000 lists MSL as Not Applicable, indicating it does not require moisture sensitivity management for this component category. Both parts are storage-stable under standard industrial conditions.