1KSMB8.2 Equivalent & Substitute Parts

Part Overview

The 1KSMB8.2 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This component provides transient overvoltage protection with a 12.1V clamping voltage and 82.6A peak pulse current capability in a surface-mount DO-214AA (SMB) package.

The 1KSMB8.2 carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for systems utilizing this component.

Substiute Parts

1KSMB8.2

Littelfuse Inc.In Stock: 10241KSMB8.2 Datasheet

Current PartRFQ

1KSMB8.2A

Littelfuse Inc.In Stock: 104771KSMB8.2A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1KSMB8.2 is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage Rating: Reverse standoff voltage of 7.02V (Typ), breakdown voltage minimum of 7.79V, and clamping voltage maximum of 12.1V at peak pulse current
• Current Handling: Peak pulse current of 82.6A at 10/1000µs pulse width
• Power Dissipation: Peak pulse power rating of 1000W
• Package Configuration: DO-214AA (SMB) surface-mount package
• Device Type: Unidirectional Zener TVS diode with single channel

The 1KSMB8.2A qualifies as a direct substitute based on identical electrical specifications and package format. Both components share the same voltage ratings, current capacity, and power dissipation characteristics. The primary distinction is product status and packaging configuration.

Parameter Comparison

Engineering Selection Recommendations

The 1KSMB8.2A is the direct functional equivalent of the 1KSMB8.2 for applications requiring identical electrical performance and package footprint. Selection between these parts should be based on the following criteria:

Product Status: The 1KSMB8.2 is classified as Obsolete, while the 1KSMB8.2A maintains Active status. For new designs or ongoing production requiring long-term component availability, the 1KSMB8.2A is the appropriate selection.

Compliance and Certifications: Both parts are RoHS compliant. The 1KSMB8.2A carries ROHS3 Compliant designation and REACH Unaffected status, providing enhanced regulatory alignment for current manufacturing standards.

Operating Temperature Range: The 1KSMB8.2 operates across -65°C to 150°C, while the 1KSMB8.2A operates across -55°C to 150°C. Applications requiring operation below -55°C must retain the original 1KSMB8.2 specification.

Packaging Configuration: The 1KSMB8.2 is supplied in bulk packaging, while the 1KSMB8.2A is supplied in Tape & Reel format. Packaging selection depends on production volume and assembly line requirements.

Frequently Asked Questions (FAQ)

Q: Can the 1KSMB8.2A be used as a direct replacement for the 1KSMB8.2 in existing designs?

A: Yes. The 1KSMB8.2A provides identical electrical specifications, including voltage ratings, current capacity, and power dissipation. Both components use the same DO-214AA (SMB) surface-mount package and footprint. The primary consideration is the reduced lower operating temperature limit (-55°C versus -65°C) in the 1KSMB8.2A. If your application operates above -55°C, substitution is direct.

Q: What is the difference between the 1KSMB8.2 and 1KSMB8.2A?

A: The electrical and mechanical specifications are identical. The differences are: (1) Product Status—1KSMB8.2 is Obsolete while 1KSMB8.2A is Active; (2) Operating Temperature Range—1KSMB8.2 operates to -65°C while 1KSMB8.2A operates to -55°C; (3) Packaging—1KSMB8.2 is supplied in bulk while 1KSMB8.2A is supplied in Tape & Reel; (4) Compliance—1KSMB8.2A carries ROHS3 and REACH certifications.

Q: Are there any electrical performance differences between these parts?

A: No. Both the 1KSMB8.2 and 1KSMB8.2A share identical electrical characteristics: 7.02V reverse standoff voltage, 7.79V minimum breakdown voltage, 12.1V maximum clamping voltage, 82.6A peak pulse current, and 1000W peak pulse power rating.

Q: Which part should I specify for new production?

A: The 1KSMB8.2A should be specified for new production. It maintains Active product status, ensuring long-term availability and supply chain continuity. It also carries current RoHS3 and REACH compliance certifications.

Q: Does the Tape & Reel packaging of the 1KSMB8.2A affect circuit performance?

A: No. Packaging format does not affect electrical performance or circuit functionality. Tape & Reel packaging is standard for high-volume surface-mount assembly and provides improved handling and automated placement capabilities.

Q: Can I use the 1KSMB8.2 in applications requiring operation below -55°C?

A: Yes. The 1KSMB8.2 is rated for operation down to -65°C, making it suitable for cryogenic or extreme cold-temperature applications. The 1KSMB8.2A is limited to -55°C minimum. For applications requiring the extended lower temperature range, the 1KSMB8.2 specification must be retained.