CS85-B2GA681KYNKA Equivalent & Substitute Parts

Part Overview

The CS85-B2GA681KYNKA is a 680 pF ceramic capacitor manufactured by TDK Corporation, rated for 300VAC/440VAC operation with B temperature coefficient. This component is classified as a safety-rated capacitor (X1, Y2) designed for high-voltage applications requiring through-hole radial mounting. The part is currently active in production with ROHS3 compliance and is suitable for applications demanding reliable AC voltage suppression and filtering in safety-critical circuits.

Substitute parts are identified when equivalent electrical performance can be maintained within the specified parameter tolerances and mechanical compatibility requirements for this product category.

Substiute Parts

CS85-B2GA681KYNKA

TDK CorporationIn Stock: 853CS85-B2GA681KYNKA Datasheet

Current PartRFQ

CS45-B2GA681K-NKA

TDK CorporationIn Stock: 2095CS45-B2GA681K-NKA Datasheet

DirectRFQ

VY2681M29Y5US63V7

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 44705VY2681M29Y5US63V7 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CS85-B2GA681KYNKA is determined by the following critical parameters:

Primary Substitution Criteria:

• Capacitance value: 680 pF (exact match required)
• Voltage rating: Minimum 300VAC, with 440VAC preferred for full compatibility
• Safety ratings: X1, Y2 certification mandatory
• Mounting type: Through hole radial configuration
• Lead spacing: 0.295" (7.50mm) for PCB compatibility
• RoHS compliance: ROHS3 Compliant

Secondary Compatibility Factors:

• Tolerance: ±10% preferred; ±20% acceptable with circuit validation
• Temperature coefficient: B preferred; Y5U acceptable within operating range
• Operating temperature: Minimum -25°C ~ 125°C coverage required
• Package dimensions: Radial disc format with kinked formed leads

Two substitute parts meet these criteria with documented electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

CS45-B2GA681K-NKA (TDK Corporation)

This substitute maintains identical electrical specifications to the main part with ±10% tolerance and B temperature coefficient. The voltage rating is 440VAC, which covers the primary operating condition of the CS85-B2GA681KYNKA. Physical dimensions are slightly reduced (0.315" vs 0.335" diameter), but lead spacing remains at 0.295" (7.50mm), ensuring PCB compatibility. Both parts carry ROHS3 compliance and X1, Y2 safety ratings. This substitute is suitable for direct replacement in applications where the 300VAC rating of the main part is not a specific requirement.

VY2681M29Y5US63V7 (Vishay Beyschlag/Draloric/BC Components)

This substitute provides 680 pF capacitance at 440VAC with Y5U temperature coefficient and ±20% tolerance. The operating temperature range extends to -40°C, providing broader low-temperature coverage than the main part. Lead spacing and safety ratings (X1, Y2) are identical. The tolerance specification of ±20% represents a relaxation from the main part's ±10%, requiring circuit-level validation for applications with tight capacitance requirements. ROHS3 compliance is maintained. This substitute is applicable where the extended temperature range and alternative temperature coefficient are acceptable within circuit design parameters.

Frequently Asked Questions (FAQ)

Q: Can CS45-B2GA681K-NKA be used as a direct replacement for CS85-B2GA681KYNKA?

A: Yes. Both parts share identical capacitance (680 pF), tolerance (±10%), temperature coefficient (B), operating temperature range (-25°C ~ 125°C), safety ratings (X1, Y2), and lead spacing (0.295"). The CS45 variant is rated for 440VAC, which satisfies the primary voltage requirement. Physical diameter is slightly smaller (0.315" vs 0.335"), but this does not affect electrical performance or PCB mounting compatibility.

Q: What is the key difference between the two substitute parts?

A: CS45-B2GA681K-NKA maintains the same tolerance (±10%) and temperature coefficient (B) as the main part. VY2681M29Y5US63V7 has a wider tolerance (±20%) and different temperature coefficient (Y5U), but extends the operating temperature range to -40°C. Selection depends on circuit requirements for capacitance tolerance and temperature performance.

Q: Is the ±20% tolerance of VY2681M29Y5US63V7 acceptable?

A: Tolerance acceptability is determined by circuit design specifications. The ±20% specification represents a wider capacitance variation band than the main part's ±10%. Applications requiring tighter capacitance control should use CS45-B2GA681K-NKA or the original CS85-B2GA681KYNKA.

Q: Are all three parts rated for safety applications?

A: Yes. All three parts carry X1, Y2 safety ratings and are suitable for safety-critical applications. All maintain ROHS3 compliance.

Q: Does the physical size difference affect PCB layout?

A: Lead spacing is identical across all three parts at 0.295" (7.50mm), ensuring PCB footprint compatibility. Diameter variations (0.335", 0.315", 0.295") do not affect electrical performance or mounting compatibility, though component placement clearance should be verified for space-constrained layouts.