Equivalent & Substitute Parts for CS85-B2GA681KYGKA

Part Overview

The CS85-B2GA681KYGKA is a 680 pF ceramic capacitor manufactured by TDK Corporation, rated for 300VAC/440VAC operation with ±10% tolerance and B temperature coefficient. This component is classified as a high-voltage safety-rated capacitor (X1, Y2) designed for through-hole mounting in applications requiring reliable AC voltage suppression and filtering. The part maintains active product status with 1017 units in current inventory stock.

Alternative equivalent and substitute parts are necessary when the primary part becomes unavailable, when design flexibility is required for supply chain optimization, or when operational parameters allow for compatible alternatives from different manufacturers or series variants.

Substiute Parts

CS85-B2GA681KYGKA

TDK CorporationIn Stock: 1057CS85-B2GA681KYGKA 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-B2GA681KYGKA is determined by the following critical parameters:

Primary Substitution Criteria:

• Capacitance value: 680 pF (exact match required)
• Voltage rating: Minimum 440VAC (equal to or exceeding the primary part's maximum rating)
• Safety ratings: X1, Y2 (mandatory for safety-critical applications)
• Mounting type: Through Hole with Radial, Disc package configuration
• Lead style: Formed Leads - Kinked

Secondary Compatibility Parameters:

• Tolerance: ±10% or tighter (±20% acceptable with design verification)
• Temperature coefficient: B or equivalent performance range
• Operating temperature: -25°C ~ 125°C minimum
• RoHS compliance: ROHS3 Compliant

Two substitute parts meet these criteria with varying degrees of parameter alignment:

1. CS45-B2GA681K-NKA (TDK Corporation): Direct manufacturer alternative within the same product family, maintaining identical capacitance, tolerance, and temperature coefficient specifications.

2. VY2681M29Y5US63V7 (Vishay Beyschlag/Draloric/BC Components): Cross-manufacturer substitute with equivalent electrical performance, featuring relaxed tolerance (±20%) and extended temperature coefficient range (Y5U).

Parameter Comparison

Engineering Selection Recommendations

CS45-B2GA681K-NKA Selection: This substitute is the preferred direct equivalent. Both parts are manufactured by TDK Corporation and share identical electrical specifications: 680 pF capacitance, ±10% tolerance, B temperature coefficient, and -25°C ~ 125°C operating range. The CS45 variant operates at 440VAC maximum rating, which is within the primary part's rated envelope. Both maintain X1, Y2 safety certifications and ROHS3 compliance. The primary distinction is reduced physical diameter (8.00mm vs. 8.50mm), which may require PCB layout verification for lead spacing compatibility, though lead spacing remains constant at 0.295" (7.50mm).

VY2681M29Y5US63V7 Selection: This cross-manufacturer substitute from Vishay Beyschlag/Draloric/BC Components provides functional equivalence with trade-offs in tolerance and temperature coefficient specification. The part maintains 680 pF capacitance, 440VAC voltage rating, X1, Y2 safety ratings, and ROHS3 compliance. The tolerance specification is relaxed to ±20% (versus ±10% on the primary part), and the temperature coefficient is Y5U (E) rather than B. The operating temperature range extends to -40°C minimum, providing enhanced low-temperature performance. Physical dimensions are smallest among the three parts (7.50mm diameter), and inventory availability is significantly higher (44,646 units in stock).

Selection Criteria:

• Choose CS45-B2GA681K-NKA for direct specification matching and minimal design impact
• Choose VY2681M29Y5US63V7 when supply chain availability is prioritized and tolerance relaxation is acceptable within circuit design margins

Frequently Asked Questions (FAQ)

Q: Can CS45-B2GA681K-NKA be used as a direct replacement for CS85-B2GA681KYGKA?

A: Yes. Both parts share identical capacitance (680 pF), tolerance (±10%), temperature coefficient (B), voltage rating (440VAC maximum), and safety certifications (X1, Y2). The primary consideration is physical diameter reduction from 8.50mm to 8.00mm, which requires verification that PCB pad spacing accommodates the smaller component footprint. Lead spacing remains constant at 0.295" (7.50mm).

Q: What are the limitations of using VY2681M29Y5US63V7 as a substitute?

A: The Vishay part introduces two specification changes: tolerance increases from ±10% to ±20%, and temperature coefficient changes from B to Y5U (E). These changes are acceptable in applications where capacitance variation within ±20% does not affect circuit performance and where the Y5U temperature coefficient provides adequate stability across the -40°C ~ 125°C operating range. The smaller physical diameter (7.50mm) must be verified against PCB layout constraints.

Q: Are all three parts suitable for safety-critical applications?

A: Yes. All three parts carry X1, Y2 safety ratings and ROHS3 compliance, qualifying them for safety-critical AC voltage suppression and filtering applications. Selection should be based on supply availability, physical footprint compatibility, and tolerance requirements specific to the circuit design.

Q: What is the impact of lead spacing on PCB compatibility?

A: All three parts maintain identical lead spacing of 0.295" (7.50mm), ensuring PCB hole pattern compatibility. The variation in component body diameter (8.50mm, 8.00mm, and 7.50mm respectively) affects only the physical clearance around the component body and does not impact electrical connectivity or mounting reliability.

Q: How does inventory availability affect part selection?

A: CS85-B2GA681KYGKA has 1017 units in stock, CS45-B2GA681K-NKA has 2074 units, and VY2681M29Y5US63V7 has 44,646 units available. For applications requiring immediate procurement or high-volume production, VY2681M29Y5US63V7 offers significantly greater availability, provided tolerance and temperature coefficient specifications are acceptable for the intended application.