SMBJ350C Equivalent & Substitute Parts

Part Overview

The SMBJ350C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 350V reverse standoff voltage with a 595.35V maximum clamping voltage and 1.1A peak pulse current capability in a DO-214AA (SMB) package. The SMBJ350C is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

SMBJ350C

Littelfuse Inc.In Stock: 1017SMBJ350C Datasheet

Current PartRFQ

SMBJ350CA

MeritekIn Stock: 17259SMBJ350CA Datasheet

DirectRFQ

SMBJ350CA-TP

Micro Commercial CoIn Stock: 753SMBJ350CA-TP Datasheet

MFR RecommendedRFQ

TV06B351JB-HF

Comchip TechnologyIn Stock: 1004TV06B351JB-HF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ350C are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Reverse standoff voltage: 350V (nominal)
• Package / case: DO-214AA (SMB) surface mount
• Bidirectional channels: 1
• Type: Zener TVS diode
• General-purpose application classification

Allowable Parameter Variations:

• Clamping voltage (Max) @ Ipp: Range 567V to 595.35V
• Peak pulse current: 1.06A to 1.1A
• Operating temperature: -55°C to 175°C (minimum -55°C acceptable; maximum 150°C or higher acceptable)
• Product status: Active or obsolete

All substitute parts maintain the same 350V reverse standoff voltage, identical package configuration, and equivalent power dissipation capability (600W peak pulse power), ensuring direct functional replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

SMBJ350CA (Meritek): This part maintains full electrical equivalence with the SMBJ350C across all critical parameters. With active product status and ROHS3 compliance, it provides immediate availability for new designs and ongoing production. The 17,200-unit inventory level ensures supply continuity.

SMBJ350CA-TP (Micro Commercial Co): This variant offers the highest peak pulse current specification (1.1A, matching the original SMBJ350C) and the widest operating temperature range (-55°C ~ 175°C). Active product status and REACH compliance support long-term procurement. Bulk packaging is suitable for high-volume manufacturing.

TV06B351JB-HF (Comchip Technology): This part provides electrical equivalence with active product status and ROHS3 compliance. Tape & Reel packaging supports automated assembly processes. The 918-unit inventory supports medium-volume requirements.

All three substitute parts are suitable for direct replacement based on product status (active), regulatory compliance (ROHS3 or REACH unaffected), and electrical parameter alignment within specified tolerances.

Frequently Asked Questions (FAQ)

Q: Can SMBJ350CA directly replace SMBJ350C in existing designs? A: Yes. Both parts share identical reverse standoff voltage (350V), package configuration (DO-214AA/SMB), and peak pulse power rating (600W). The clamping voltage difference (567V vs. 595.35V) and peak pulse current variation (1.06A vs. 1.1A) fall within acceptable substitution tolerances for general-purpose TVS applications.

Q: What is the significance of the clamping voltage difference between SMBJ350C and its substitutes? A: The SMBJ350C specifies a maximum clamping voltage of 595.35V, while substitute parts specify 567V. Both values protect circuits designed for 350V standoff operation. The lower clamping voltage in substitutes provides equivalent or improved protection margins in most applications.

Q: Are all substitute parts suitable for automated assembly? A: SMBJ350CA and TV06B351JB-HF are available in standard surface-mount packaging. SMBJ350CA-TP is specifically offered in Tape & Reel format, optimized for pick-and-place assembly. SMBJ350CA is available in bulk packaging suitable for manual or semi-automated processes.

Q: Which substitute part offers the widest operating temperature range? A: SMBJ350CA-TP supports -55°C ~ 175°C, exceeding the original SMBJ350C specification of -65°C ~ 150°C at the upper temperature limit. This extended range accommodates high-temperature applications.

Q: Do all substitute parts meet RoHS compliance requirements? A: SMBJ350CA and TV06B351JB-HF carry ROHS3 compliance certification. SMBJ350CA-TP is REACH unaffected, meeting equivalent environmental standards. All parts satisfy current regulatory requirements for electronic component procurement.

Q: What is the inventory status for each substitute part? A: SMBJ350CA: 17,200 units; SMBJ350CA-TP: 648 units; TV06B351JB-HF: 918 units. SMBJ350CA provides the highest availability for immediate procurement needs.