SMBJE460AH Equivalent & Substitute Parts

Part Overview

The SMBJE460AH is an active Transient Voltage Suppressor (TVS) diode manufactured by Eaton - Electronics Division. This unidirectional zener device is designed for transient overvoltage protection in telecom applications, featuring a 460V reverse standoff voltage and 735V maximum clamping voltage. The component is housed in a surface-mount DO-214AA (SMB) package and is qualified to AEC-Q101 automotive standards with ROHS3 compliance.

Equivalent and substitute parts are identified when alternative manufacturers offer TVS diodes with matching or compatible electrical and mechanical specifications, enabling procurement flexibility while maintaining circuit protection performance.

Substiute Parts

SMBJE460AH

Eaton - Electronics DivisionIn Stock: 773SMBJE460AH Datasheet

Current PartRFQ

TPSMB540A-A

Littelfuse Inc.In Stock: 3687TPSMB540A-A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJE460AH is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Criteria:

• Reverse standoff voltage: 460V (typical)
• Peak pulse current rating: 800mA
• Peak pulse power dissipation: 600W
• Unidirectional channel configuration: 1 channel
• Zener diode type classification

Mechanical Compatibility Criteria:

• Package type: DO-214AA (SMB) surface mount
• Mounting configuration: Tape & Reel (TR)

Compliance & Qualification Criteria:

• AEC-Q101 automotive qualification
• ROHS3 compliance
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts must maintain these specifications within the allowed parameter ranges. Variations in clamping voltage (735V to 740V) and breakdown voltage (510V to 513V) remain within acceptable engineering tolerances for TVS diode protection circuits. Operating temperature range extensions are permissible when the substitute part maintains the minimum specified range.

Parameter Comparison

Engineering Selection Recommendations

SMBJE460AH (Eaton - Electronics Division) is the primary component specification. This part maintains active product status with AEC-Q101 automotive qualification and ROHS3 environmental compliance. The device is suitable for telecom transient protection applications requiring 460V standoff voltage protection with 800mA peak pulse current handling.

TPSMB540A-A (Littelfuse Inc.) is a qualified substitute meeting all critical electrical and mechanical parameters. This alternative offers:

• Identical reverse standoff voltage (460V) and peak pulse current (800mA)
• Clamping voltage within acceptable tolerance (740V vs. 735V)
• Breakdown voltage within acceptable tolerance (513V vs. 510V)
• Extended operating temperature range (-65°C to 150°C vs. -55°C to 150°C)
• Matching AEC-Q101 qualification and ROHS3 compliance
• Identical surface-mount DO-214AA package configuration
• Equivalent moisture sensitivity rating

Both components are suitable for direct substitution in circuit designs where the SMBJE460AH specification is called out, provided the application does not impose additional constraints beyond the stated electrical and thermal parameters.

Frequently Asked Questions (FAQ)

Q: Can TPSMB540A-A replace SMBJE460AH in existing designs?

A: Yes. Both devices share identical reverse standoff voltage (460V), peak pulse current (800mA), and power dissipation (600W) ratings. The clamping voltage difference (740V vs. 735V) and breakdown voltage difference (513V vs. 510V) are within acceptable engineering tolerances for TVS diode protection circuits. Both components are AEC-Q101 qualified and ROHS3 compliant.

Q: Are there package differences between these parts?

A: No. Both SMBJE460AH and TPSMB540A-A use identical DO-214AA (SMB) surface-mount packages. PCB footprints and reflow soldering processes are interchangeable.

Q: What is the significance of the extended temperature range in TPSMB540A-A?

A: The TPSMB540A-A operates from -65°C to 150°C, compared to -55°C to 150°C for SMBJE460AH. This extended low-temperature specification provides additional operational margin in applications exposed to extreme cold environments. The upper temperature limit remains identical at 150°C.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both SMBJE460AH and TPSMB540A-A carry AEC-Q101 automotive qualification, indicating compliance with automotive reliability and quality standards.

Q: Are there moisture sensitivity differences?

A: No. Both components are rated at Moisture Sensitivity Level 1 (Unlimited), indicating no moisture-related handling restrictions during storage or assembly.

Q: What is the basis for substitution compatibility?

A: Substitution is based on matching reverse standoff voltage, peak pulse current, power dissipation, package type, and automotive qualification. Clamping and breakdown voltages vary within acceptable tolerances specific to TVS diode protection circuit design.