1KSMB110C Equivalent & Substitute Parts

Part Overview

The 1KSMB110C is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This component is classified as Obsolete, which necessitates identification of equivalent substitute parts for ongoing design support and procurement. The 1KSMB110C operates as a unidirectional Zener-type TVS diode in a surface-mount DO-214AA (SMB) package, providing transient voltage suppression with a 152V clamping voltage and 6.6A peak pulse current capability.

Substiute Parts

1KSMB110C

Littelfuse Inc.In Stock: 8111KSMB110C Datasheet

Current PartRFQ

1KSMB110CA

Littelfuse Inc.In Stock: 9081KSMB110CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1KSMB110C is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 94V
• Voltage - Breakdown (Min): 105V
• Voltage - Clamping (Max) @ Ipp: 152V
• Current - Peak Pulse (10/1000µs): 6.6A
• Power - Peak Pulse: 1000W (1kW)
• Bidirectional Channels: 1
• Type: Zener

Mechanical Parameters (Must Match):

• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount

Compliance Parameters:

• RoHS Status: RoHS Compliant or equivalent
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The 1KSMB110CA qualifies as a direct substitute based on identical electrical specifications and mechanical packaging. The primary distinction is product status (Active versus Obsolete) and packaging format (Tape & Reel versus bulk), which do not affect functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The 1KSMB110CA is a direct functional equivalent to the 1KSMB110C for circuit applications requiring identical electrical performance. Selection between these parts is based on the following criteria:

Use 1KSMB110C when:

• Existing inventory of the obsolete part is available and acceptable for the application
• Extended low-temperature operation below -55°C is required (operating range extends to -65°C)

Use 1KSMB110CA when:

• New procurement is required (Active product status ensures ongoing availability)
• Tape & Reel packaging format is compatible with assembly processes
• Operating temperature range of -55°C to 150°C satisfies application requirements
• ROHS3 compliance is required for regulatory or customer specifications

Both parts are RoHS compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, indicating no special storage or handling requirements. The electrical specifications are identical across all critical parameters: 94V reverse standoff voltage, 105V minimum breakdown voltage, 152V maximum clamping voltage, and 6.6A peak pulse current. Both components are housed in the DO-214AA (SMB) surface-mount package and are suitable for direct PCB substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the 1KSMB110CA be used as a direct replacement for the 1KSMB110C in existing designs?

A: Yes. The 1KSMB110CA provides identical electrical performance across all critical parameters: reverse standoff voltage, breakdown voltage, clamping voltage, and peak pulse current. Both components use the same DO-214AA (SMB) surface-mount package, enabling direct PCB substitution without design changes.

Q: What is the difference between the 1KSMB110C and 1KSMB110CA?

A: The primary differences are product status and packaging format. The 1KSMB110C is Obsolete and supplied in bulk packaging, while the 1KSMB110CA is Active and supplied in Tape & Reel format. The 1KSMB110C operates from -65°C to 150°C, whereas the 1KSMB110CA operates from -55°C to 150°C. All electrical specifications are identical.

Q: Does the operating temperature range difference affect substitution?

A: The 1KSMB110CA has a narrower low-temperature operating range (-55°C minimum versus -65°C minimum for the 1KSMB110C). If the application requires operation below -55°C, the 1KSMB110C is required. For applications within the -55°C to 150°C range, the 1KSMB110CA is fully suitable.

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

A: Both parts are RoHS compliant. The 1KSMB110C carries RoHS Compliant status, while the 1KSMB110CA carries ROHS3 Compliant status. Both maintain MSL 1 (Unlimited) moisture sensitivity ratings. The 1KSMB110CA includes REACH Unaffected status in its documentation.

Q: What packaging formats are available for these parts?

A: The 1KSMB110C is supplied in bulk packaging. The 1KSMB110CA is supplied in Tape & Reel (TR) format. Both use the DO-214AA (SMB) component package. Packaging format selection depends on assembly process requirements and volume considerations.

Q: Are these parts suitable for telecom applications?

A: The 1KSMB110C is specifically rated for telecom applications. The 1KSMB110CA is rated for general-purpose applications. Both provide equivalent transient voltage suppression performance and are suitable for telecom circuit protection when electrical specifications match application requirements.

Q: What is the peak pulse power rating for these TVS diodes?

A: Both the 1KSMB110C and 1KSMB110CA are rated for 1000W (1kW) peak pulse power with a 10/1000µs pulse waveform. This rating applies to transient suppression events and is not continuous power dissipation.