1KSMB13C Equivalent & Substitute Parts

Part Overview

The 1KSMB13C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This bidirectional zener diode operates with a reverse standoff voltage of 11.1V and provides clamping protection at 18.2V with a peak pulse current rating of 54.9A. The device is packaged in a DO-214AA (SMBJ) surface mount configuration and rated for 1000W peak pulse power dissipation.

The 1KSMB13C carries an obsolete product status. Identifying equivalent substitute parts ensures design continuity and maintains supply chain reliability for applications requiring identical electrical and mechanical specifications.

Substiute Parts

1KSMB13C

Littelfuse Inc.In Stock: 8931KSMB13C Datasheet

Current PartRFQ

1KSMB13CA

Taiwan Semiconductor CorporationIn Stock: 141871KSMB13CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1KSMB13C is determined by strict equivalence across the following critical parameters:

• Voltage Rating: Reverse standoff voltage of 11.1V, breakdown voltage minimum of 12.4V, and clamping voltage maximum of 18.2V must be identical
• Current Handling: Peak pulse current of 54.9A at 10/1000µs pulse duration must be maintained
• Power Dissipation: Peak pulse power rating of 1000W must be matched
• Package Configuration: DO-214AA (SMB) surface mount package is required for mechanical and thermal compatibility
• Diode Type: Bidirectional zener topology with single channel configuration

The 1KSMB13CA manufactured by Taiwan Semiconductor Corporation meets all specified electrical and mechanical parameters and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The 1KSMB13CA is a direct electrical and mechanical equivalent to the obsolete 1KSMB13C. All critical voltage, current, and power parameters are identical. The substitute part maintains the same DO-214AA (SMB) surface mount package, ensuring compatibility with existing PCB layouts and assembly processes.

The 1KSMB13CA carries an active product status, providing long-term availability and supply chain stability. The substitute part exceeds the original operating temperature range (-55°C to 175°C versus -65°C to 150°C), offering enhanced thermal performance. Both parts maintain identical RoHS and moisture sensitivity classifications, ensuring compliance with environmental and manufacturing standards.

The 1KSMB13CA is manufactured by Taiwan Semiconductor Corporation and is available in significantly higher inventory quantities (14,100 pieces) compared to the original part, supporting production requirements without supply constraints.

Frequently Asked Questions (FAQ)

Q: Can the 1KSMB13CA be used as a direct replacement for the 1KSMB13C in existing designs?

A: Yes. The 1KSMB13CA provides identical electrical performance across all critical parameters: 11.1V reverse standoff voltage, 18.2V clamping voltage, 54.9A peak pulse current, and 1000W peak pulse power. The package configuration (DO-214AA SMB) is identical, enabling direct PCB substitution without layout modifications.

Q: Are there differences in operating temperature ranges between these parts?

A: The 1KSMB13CA operates across a wider temperature range (-55°C to 175°C) compared to the 1KSMB13C (-65°C to 150°C). This represents an enhancement in the substitute part and does not create compatibility issues for applications within the original temperature specification.

Q: Do both parts meet the same compliance standards?

A: Both parts are RoHS compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. The 1KSMB13CA is ROHS3 compliant, representing current regulatory alignment. Both parts carry identical ECCN and HTSUS classifications.

Q: What is the significance of the product status difference?

A: The 1KSMB13C is obsolete, indicating discontinued manufacturing and limited availability. The 1KSMB13CA is active, ensuring ongoing production, technical support, and supply chain continuity for new designs and production runs.

Q: Are there any application differences between the original and substitute part?

A: The 1KSMB13C is specified for telecom applications, while the 1KSMB13CA is designated for general purpose applications. The electrical and mechanical specifications are identical, making the substitute suitable for the original telecom application and broader use cases.