P6SMBJ440C Equivalent & Substitute Parts

Part Overview

The P6SMBJ440C 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 376V reverse standoff voltage with 632.1V maximum clamping voltage and 1A peak pulse current capability in a DO-214AA (SMB) package.

The P6SMBJ440C is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

P6SMBJ440C

Littelfuse Inc.In Stock: 832P6SMBJ440C Datasheet

Current PartRFQ

SMBJP6KE440CA-TP

Micro Commercial CoIn Stock: 3871SMBJP6KE440CA-TP Datasheet

DirectRFQ

P6SMB440CA

Eaton - Electronics DivisionIn Stock: 740193P6SMB440CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMBJ440C is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 376V
• Voltage - Clamping (Max) @ Ipp: Must not exceed 632.1V to ensure protection threshold compatibility
• Current - Peak Pulse (10/1000µs): 1A minimum
• Power - Peak Pulse: 600W minimum
• Package / Case: DO-214AA, SMB (surface-mount compatibility)
• Mounting Type: Surface Mount
• Operating Temperature Range: Minimum -55°C ~ 150°C

The identified substitute parts maintain these core electrical and mechanical parameters, ensuring functional equivalence in circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain electrical equivalence with the P6SMBJ440C across all critical protection parameters. Selection between SMBJP6KE440CA-TP and P6SMB440CA should be based on the following factors:

SMBJP6KE440CA-TP (Micro Commercial Co) offers an extended operating temperature range of -55°C ~ 175°C, providing additional thermal margin in high-temperature environments. This part is supplied in Tape & Reel packaging and carries REACH Unaffected status.

P6SMB440CA (Eaton) is the manufacturer-recommended substitute, supplied in Cut Tape and Digi-Reel formats with significantly higher inventory availability (740,100 pcs). This part maintains the original operating temperature range of -55°C ~ 150°C and carries REACH Unaffected status.

Both parts are RoHS compliant and suitable for direct replacement in existing designs. The lower clamping voltage (602V vs. 632.1V) of both substitutes provides improved protection margins.

Frequently Asked Questions (FAQ)

Q: Can SMBJP6KE440CA-TP and P6SMB440CA be used interchangeably with P6SMBJ440C?

A: Yes. Both parts maintain the same reverse standoff voltage (376V), peak pulse current (1A), and power dissipation (600W). The lower clamping voltages (602V) of the substitutes provide enhanced protection. Package and mounting type are identical (DO-214AA, SMB, surface mount).

Q: What is the difference in clamping voltage between the original and substitute parts?

A: The P6SMBJ440C specifies a maximum clamping voltage of 632.1V, while both substitutes specify 602V. The lower clamping voltage in the substitutes results in faster voltage suppression and is acceptable for circuit protection applications.

Q: Are there temperature range considerations when selecting a substitute?

A: The SMBJP6KE440CA-TP supports -55°C ~ 175°C, exceeding the original -55°C ~ 150°C range. The P6SMB440CA maintains the original temperature range. Selection depends on application thermal requirements.

Q: What packaging formats are available for the substitute parts?

A: SMBJP6KE440CA-TP is supplied in Tape & Reel format. P6SMB440CA is available in Cut Tape and Digi-Reel formats. Both are compatible with automated assembly processes.

Q: Are both substitutes RoHS compliant?

A: Yes. SMBJP6KE440CA-TP is ROHS3 Compliant. P6SMB440CA is RoHS Compliant. Both meet environmental compliance requirements.