1KSMB82 Equivalent & Substitute Parts

Part Overview

The 1KSMB82 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for transient overvoltage protection in telecom applications. This component features a 70.1V reverse standoff voltage, 113V maximum clamping voltage, and 8.8A peak pulse current capability in a surface mount DO-214AA (SMB) package.

The 1KSMB82 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this component.

Substiute Parts

1KSMB82

Littelfuse Inc.In Stock: 10191KSMB82 Datasheet

Current PartRFQ

1KSMB82A

Taiwan Semiconductor CorporationIn Stock: 102411KSMB82A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1KSMB82 is determined by electrical and mechanical parameter equivalence. The following criteria establish valid substitution:

Electrical Parameters (Critical):

• Voltage - Reverse Standoff (Typ): 70.1V
• Voltage - Breakdown (Min): 77.9V
• Voltage - Clamping (Max) @ Ipp: 113V
• Current - Peak Pulse (10/1000µs): 8.8A
• Power - Peak Pulse: 1000W

Mechanical Parameters (Critical):

• Type: Zener
• Unidirectional Channels: 1
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount

Environmental Parameters (Supporting):

• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts must match all critical electrical and mechanical parameters. Operating temperature range and product status variations do not preclude substitution when electrical and mechanical specifications are identical.

Parameter Comparison

Engineering Selection Recommendations

The 1KSMB82A (Taiwan Semiconductor Corporation) is a direct electrical and mechanical equivalent to the 1KSMB82 (Littelfuse Inc.). All critical voltage, current, and power specifications are identical. Both components are packaged in DO-214AA (SMB) surface mount format with MSL 1 rating.

Product Status Consideration: The 1KSMB82 is obsolete, while the 1KSMB82A is active. Selection of the 1KSMB82A ensures ongoing component availability and supply chain continuity.

Compliance Consideration: Both parts are RoHS compliant. The 1KSMB82A carries ROHS3 compliance certification, representing current regulatory alignment. The 1KSMB82A is REACH Unaffected, confirming regulatory status under current chemical substance regulations.

Operating Temperature Consideration: The 1KSMB82A supports an extended operating temperature range (-55°C ~ 175°C) compared to the original part (-65°C ~ 150°C). This extended range provides additional thermal margin for applications operating at elevated temperatures.

Packaging Consideration: The 1KSMB82A is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. The original 1KSMB82 packaging specification is not detailed in available data.

Frequently Asked Questions (FAQ)

Q: Can the 1KSMB82A replace the 1KSMB82 in existing designs?

A: Yes. The 1KSMB82A is electrically and mechanically equivalent. All critical parameters—reverse standoff voltage (70.1V), breakdown voltage (77.9V), clamping voltage (113V), peak pulse current (8.8A), and power rating (1000W)—are identical. Both components use the DO-214AA (SMB) surface mount package.

Q: What is the primary reason to substitute the 1KSMB82?

A: The 1KSMB82 is classified as obsolete. The 1KSMB82A is an active product with confirmed supply availability, ensuring design continuity and production support.

Q: Are there differences in operating temperature ranges?

A: Yes. The 1KSMB82 operates from -65°C to 150°C (TJ), while the 1KSMB82A operates from -55°C to 175°C (TJ). The 1KSMB82A provides an extended upper temperature limit. For applications requiring the full -65°C lower limit, verify that the 1KSMB82A's -55°C minimum is acceptable for your thermal environment.

Q: Do both parts meet current regulatory requirements?

A: Both parts are RoHS compliant. The 1KSMB82A carries ROHS3 certification and is REACH Unaffected, confirming alignment with current environmental and chemical substance regulations.

Q: What is the packaging difference?

A: The 1KSMB82A is supplied in Tape & Reel (TR) format, optimized for automated assembly. This format is standard for high-volume production environments.

Q: Are the moisture sensitivity levels equivalent?

A: Yes. Both the 1KSMB82 and 1KSMB82A carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.

Q: Can I use the 1KSMB82A in telecom applications?

A: The 1KSMB82A is rated for general purpose applications. The original 1KSMB82 is specifically rated for telecom applications. Electrical specifications are identical; however, application-specific qualification should be performed if telecom-grade certification is a design requirement.