1KSMB56C Equivalent & Substitute Parts

Part Overview

The 1KSMB56C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for surface mount applications in DO-214AA (SMB) packaging. This component provides bidirectional overvoltage protection with a 47.8V reverse standoff voltage and 77V maximum clamping voltage at peak pulse current. The 1KSMB56C is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability for new production and field replacements.

Substiute Parts

1KSMB56C

Littelfuse Inc.In Stock: 6781KSMB56C Datasheet

Current PartRFQ

1KSMB56CA

Taiwan Semiconductor CorporationIn Stock: 154231KSMB56CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1KSMB56C is determined by electrical and mechanical parameter equivalence. The substitute part must maintain identical specifications across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 47.8V
• Voltage - Breakdown (Min): 53.2V
• Voltage - Clamping (Max) @ Ipp: 77V
• Current - Peak Pulse (10/1000µs): 13A
• Power - Peak Pulse: 1000W
• Bidirectional Channels: 1
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount

The 1KSMB56CA, manufactured by Taiwan Semiconductor Corporation, meets all electrical and mechanical requirements for direct substitution. Both parts share identical voltage ratings, peak pulse current specifications, and package configuration. The substitute part is classified as active product status, ensuring ongoing availability and supply chain support.

Parameter Comparison

Engineering Selection Recommendations

The 1KSMB56CA is a direct electrical and mechanical equivalent to the obsolete 1KSMB56C. Both components are classified as RoHS compliant, with the substitute part meeting ROHS3 specifications. The 1KSMB56CA maintains identical voltage and current ratings, ensuring functional compatibility in all circuit applications designed for the original 1KSMB56C.

The substitute part exhibits an extended operating temperature range (-55°C ~ 175°C) compared to the original part (-65°C ~ 150°C), providing additional thermal margin in high-temperature environments. Both components share MSL Level 1 moisture sensitivity classification, indicating unlimited shelf life under standard storage conditions.

The 1KSMB56CA is supplied in Tape & Reel (TR) packaging format, suitable for automated assembly processes. The original 1KSMB56C packaging format is not specified in the provided data. Both parts are classified under ECCN EAR99 and HTSUS 8541.10.0080 for export and tariff purposes.

Frequently Asked Questions (FAQ)

Q: Can the 1KSMB56CA be used as a direct replacement for the 1KSMB56C in existing designs?

A: Yes. The 1KSMB56CA meets all electrical specifications (voltage ratings, peak pulse current, and power dissipation) and mechanical requirements (DO-214AA SMB package, surface mount configuration) of the 1KSMB56C. No circuit modifications are required.

Q: What is the primary reason for substitution?

A: The 1KSMB56C is classified as obsolete product status. The 1KSMB56CA is an active product, ensuring continued availability and supply chain support for production and field replacement applications.

Q: Are there packaging differences between the two parts?

A: The 1KSMB56CA is supplied in Tape & Reel (TR) packaging, optimized for automated assembly. The original 1KSMB56C packaging format is not specified. Both parts use identical DO-214AA (SMB) component packaging.

Q: Do both parts meet RoHS compliance requirements?

A: Yes. The 1KSMB56C is RoHS Compliant. The 1KSMB56CA meets ROHS3 Compliant specifications, representing an updated compliance standard.

Q: What is the operating temperature difference between the parts?

A: The 1KSMB56C operates from -65°C to 150°C. The 1KSMB56CA operates from -55°C to 175°C. The substitute part provides extended high-temperature capability, suitable for applications requiring operation above 150°C.

Q: Are moisture sensitivity levels equivalent?

A: Yes. Both parts are classified as MSL Level 1 (Unlimited), indicating identical shelf life and storage requirements with no time-dependent moisture sensitivity restrictions.

Q: What is the inventory status of the substitute part?

A: The 1KSMB56CA has 15,400 pieces in stock as new original inventory, compared to 649 pieces available for the obsolete 1KSMB56C. The substitute part offers significantly greater supply availability.