681KD07 Equivalent & Substitute Parts

Part Overview

The 681KD07 is a metal oxide varistor (MOV) disc designed for transient voltage suppression applications. Manufactured by YAGEO, this through-hole component provides 680 V nominal varistor voltage with 1.2 kA surge current capacity in a compact 7mm disc package. The part is classified as Active and maintains full operational status in the market. Equivalent substitute parts are identified when identical electrical specifications and mechanical compatibility are maintained across manufacturers, ensuring direct replacement capability in circuit protection applications.

Substiute Parts

681KD07

YAGEOIn Stock: 1189681KD07 Datasheet

Current PartRFQ

B72207S0421K101

EPCOS - TDK ElectronicsIn Stock: 6957B72207S0421K101 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 681KD07 is determined by strict equivalence across the following critical parameters:

• Varistor Voltage Range: Minimum 612 V, Typical 680 V, Maximum 748 V
• Surge Current Rating: 1.2 kA
• Maximum AC/DC Voltage Ratings: 420 V AC / 560 V DC
• Package Configuration: Disc 7mm through-hole mounting
• Number of Circuits: Single circuit (1)
• Operating Temperature: -40°C to 105°C
• Capacitance Specification: 75 pF @ 1 kHz

The substitute part B72207S0421K101 (EPCOS - TDK Electronics) meets all specified electrical and mechanical parameters, enabling direct replacement in the same application context.

Parameter Comparison

Engineering Selection Recommendations

Both the 681KD07 and B72207S0421K101 are Active products with identical electrical and mechanical specifications across all critical parameters. The B72207S0421K101 carries ROHS3 compliance and REACH Unaffected status, providing additional regulatory alignment for applications requiring environmental compliance documentation. The energy absorption difference (42 J versus 32 J) reflects manufacturing variance within the same product class but does not affect substitution eligibility given identical voltage and current ratings.

Selection between these parts should be based on:

• Availability: B72207S0421K101 maintains higher inventory levels (6847 pcs vs. 1129 pcs)
• Regulatory Requirements: B72207S0421K101 provides explicit ROHS3 and REACH compliance statements
• Supply Chain Continuity: Either part provides equivalent circuit protection performance

Frequently Asked Questions (FAQ)

Q: Can the B72207S0421K101 directly replace the 681KD07 in existing designs?

A: Yes. Both parts share identical varistor voltage specifications (680 V typical), surge current ratings (1.2 kA), maximum voltage ratings (420 V AC / 560 V DC), operating temperature range (-40°C to 105°C), and disc 7mm through-hole package configuration. No circuit modifications are required.

Q: What is the significance of the energy rating difference (42 J vs. 32 J)?

A: Energy absorption ratings reflect the component's thermal dissipation capacity during transient events. Both parts are rated for identical voltage and current parameters, indicating both are suitable for the same application class. The energy difference represents manufacturing tolerance within the varistor product family.

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

A: The B72207S0421K101 explicitly declares ROHS3 compliance and REACH Unaffected status. The 681KD07 does not provide these certifications in the available data. Applications requiring environmental compliance documentation should reference the B72207S0421K101.

Q: Do both parts have the same capacitance characteristics?

A: Yes. Both parts measure 75 pF at 1 kHz, ensuring identical high-frequency behavior in circuit applications.

Q: What is the moisture sensitivity level for these parts?

A: The 681KD07 is classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. The B72207S0421K101 lists MSL as Not Applicable, consistent with varistor disc technology.

Q: Can these parts be used interchangeably in new designs?

A: Yes. Both parts meet identical electrical and mechanical specifications for transient voltage suppression applications. Design selection can be based on availability, compliance requirements, or supply chain preferences.