SMAJ200 Equivalent & Substitute Parts

Part Overview

The SMAJ200 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. It features a 200V reverse standoff voltage rating with a 340.2V maximum clamping voltage and 1.2A peak pulse current capability in a surface-mount DO-214AC (SMA) package. The SMAJ200 is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement.

Substiute Parts

SMAJ200

Littelfuse Inc.In Stock: 877SMAJ200 Datasheet

Current PartRFQ

SMAJ200A

Good-Ark SemiconductorIn Stock: 20214SMAJ200A Datasheet

MFR RecommendedRFQ

SMAJ200A

Good-Ark SemiconductorIn Stock: 20214SMAJ200A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMAJ200 is determined by strict equivalence across the following critical parameters:

• Reverse standoff voltage: 200V (nominal)
• Peak pulse current rating: 1.2A
• Power dissipation capability: 400W
• Package type: DO-214AC (SMA) surface mount
• Diode type: Unidirectional zener

The SMAJ200A from Good-Ark Semiconductor qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. While the clamping voltage differs (324V vs. 340.2V), both values remain within acceptable operating margins for the 200V standoff class. The SMAJ200A maintains identical peak pulse current, power rating, package configuration, and mounting type.

Parameter Comparison

Engineering Selection Recommendations

The SMAJ200A from Good-Ark Semiconductor is the direct equivalent for SMAJ200 applications. Selection is supported by:

• Identical reverse standoff voltage (200V) and peak pulse current rating (1.2A)
• Matching 400W power dissipation capability
• Identical DO-214AC (SMA) package and surface-mount configuration
• Active product status ensuring ongoing availability and supply chain continuity
• ROHS3 compliance and MSL 1 rating matching the original specification
• Clamping voltage variance (324V vs. 340.2V) remains within acceptable tolerance for 200V standoff class TVS diodes

The SMAJ200A operates across a slightly narrower temperature range (-55°C to 150°C vs. -65°C to 150°C), which is acceptable for most general-purpose applications. Designs requiring the full -65°C lower temperature limit should verify application requirements before substitution.

Frequently Asked Questions (FAQ)

Q: Can SMAJ200A be used as a direct replacement for SMAJ200 in existing designs?

A: Yes. The SMAJ200A matches all critical electrical parameters (200V standoff, 1.2A peak pulse, 400W power) and package configuration (DO-214AC, SMA). Both are unidirectional zener TVS diodes with identical mounting type and compliance certifications.

Q: What is the significance of the clamping voltage difference (340.2V vs. 324V)?

A: Both values fall within the acceptable clamping range for 200V standoff class TVS diodes. The 16.2V difference does not affect functional equivalence for general-purpose overvoltage protection applications.

Q: Does the temperature range difference affect substitution?

A: The SMAJ200A operates from -55°C to 150°C, compared to SMAJ200's -65°C to 150°C. For applications requiring operation below -55°C, verify that the narrower range is acceptable for your specific use case.

Q: Are both parts RoHS compliant?

A: Yes. Both SMAJ200 and SMAJ200A are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), meeting current environmental and reliability standards.

Q: What packaging options are available for SMAJ200A?

A: SMAJ200A is supplied in Tape & Reel (TR) packaging, maintaining the same DO-214AC (SMA) component package as the original SMAJ200.