1KSMB62 Equivalent & Substitute Parts

Part Overview

The 1KSMB62 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 53V reverse standoff voltage with an 89.25V maximum clamping voltage and 11.8A peak pulse current capability in a DO-214AA (SMB) package. The part is currently listed as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

1KSMB62

Littelfuse Inc.In Stock: 7601KSMB62 Datasheet

Current PartRFQ

1KSMB62A

Taiwan Semiconductor CorporationIn Stock: 101611KSMB62A Datasheet

DirectRFQ

P6SMB62A

Thinking Electronics Industrial Co.In Stock: 7345P6SMB62A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1KSMB62 is determined by the following critical parameters:

• Voltage Rating Match: Reverse standoff voltage of 53V and breakdown voltage minimum of 55.8V
• Clamping Voltage Compatibility: Maximum clamping voltage at Ipp must not exceed 89.25V to maintain circuit protection integrity
• Current Handling: Peak pulse current capability of 11.8A minimum
• Package Compatibility: DO-214AA (SMB) surface-mount package required
• Diode Type: Unidirectional Zener configuration
• Temperature Range: Operating temperature capability of -55°C minimum to 150°C minimum

The substitute parts listed below meet these core electrical and mechanical requirements, enabling direct functional replacement in the circuit application.

Parameter Comparison

Engineering Selection Recommendations

1KSMB62A (Taiwan Semiconductor Corporation) is the primary substitute for the obsolete 1KSMB62. This part maintains identical reverse standoff voltage (53V), peak pulse current (11.8A), and power dissipation (1000W) specifications. The clamping voltage is reduced to 85V, providing improved protection margin. The part is in active production status with ROHS3 compliance and extended operating temperature range to 175°C. Packaging is supplied as Tape & Reel (TR), suitable for automated assembly.

P6SMB62A (Thinking Electronics Industrial Co.) is an alternative substitute with matching voltage ratings and package configuration. This part operates within the same temperature range as the original (-55°C ~ 150°C) and maintains RoHS compliance. However, the peak pulse current is reduced to 7.06A and power dissipation is 600W, making this option suitable only for applications where the lower current and power ratings are acceptable within the circuit design margins.

Frequently Asked Questions (FAQ)

Q: Can the 1KSMB62A directly replace the 1KSMB62 without circuit modification?

A: Yes. The 1KSMB62A maintains the critical electrical parameters: 53V reverse standoff voltage, 11.8A peak pulse current, and 1000W power dissipation. The reduced clamping voltage (85V vs. 89.25V) provides enhanced protection. Both parts use identical DO-214AA (SMB) packaging.

Q: What is the difference between the 1KSMB62A and P6SMB62A substitutes?

A: Both parts share the same voltage ratings and package. The primary difference is current handling capacity: 1KSMB62A provides 11.8A peak pulse current and 1000W power dissipation, while P6SMB62A is rated for 7.06A and 600W. Select based on circuit peak transient current requirements.

Q: Are there packaging differences between substitute options?

A: Both substitute parts are supplied in DO-214AA (SMB) surface-mount packages. The 1KSMB62A is available in Tape & Reel (TR) packaging for automated assembly, while P6SMB62A is also supplied in Tape & Reel format. Both are compatible with standard pick-and-place equipment.

Q: Do the substitute parts meet the same compliance standards as the original?

A: Yes. Both 1KSMB62A and P6SMB62A are RoHS compliant with MSL 1 (Unlimited) moisture sensitivity rating. The 1KSMB62A carries ROHS3 certification matching the original part. Both are REACH unaffected.

Q: What is the temperature operating range difference?

A: The original 1KSMB62 and P6SMB62A operate from -55°C to 150°C. The 1KSMB62A extends the upper limit to 175°C, providing additional thermal margin for high-temperature applications.