SMA6F7.5A-M3/6B Equivalent & Substitute Parts

Part Overview

The SMA6F7.5A-M3/6B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates as a Zener-type TVS device in the TransZorb® series, designed for general-purpose transient voltage protection applications. The device is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for this product category.

Substiute Parts

SMA6F7.5A-M3/6B

Vishay General Semiconductor - Diodes DivisionIn Stock: 1184SMA6F7.5A-M3/6B Datasheet

Current PartRFQ

SMAJ7.5A-TP

Micro Commercial CoIn Stock: 5836SMAJ7.5A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMA6F7.5A-M3/6B are identified based on the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff (Typ): 7.5V
• Voltage - Breakdown (Min): 8.33V
• Unidirectional channel configuration (1 channel)
• Type: Zener TVS diode
• General-purpose application classification

Mechanical Compatibility Criteria:

• Surface mount mounting type
• SMA-class package footprint (DO-214AC or DO-221AC variants)
• Active product status
• RoHS3 compliance

The SMAJ7.5A-TP from Micro Commercial Co meets the core electrical specifications (7.5V standoff, 8.33V breakdown minimum) and maintains surface-mount compatibility within the SMA package family. While peak pulse current and clamping voltage differ from the primary part, these parameters remain within acceptable substitution ranges for general-purpose TVS applications where the 7.5V protection threshold is the controlling specification.

Parameter Comparison

Engineering Selection Recommendations

Both the SMA6F7.5A-M3/6B and SMAJ7.5A-TP are active-status components with full RoHS3 compliance and REACH unaffected status. Selection between these parts depends on application-specific power dissipation requirements:

The SMA6F7.5A-M3/6B (Vishay) provides higher peak pulse current (235A) and peak pulse power (4000W), suitable for applications requiring robust transient suppression with greater energy absorption capacity.

The SMAJ7.5A-TP (Micro Commercial Co) provides lower peak pulse current (31A) and peak pulse power (400W), appropriate for applications with lower transient energy levels or space-constrained designs.

Both devices maintain identical reverse standoff voltage (7.5V) and breakdown voltage minimum (8.33V), ensuring equivalent protection threshold performance. Package differences (DO-221AC SlimSMA versus DO-214AC SMA) require PCB layout verification for mechanical fit.

Frequently Asked Questions (FAQ)

Q: What determines if SMAJ7.5A-TP can substitute for SMA6F7.5A-M3/6B?

A: The substitute part must maintain the same reverse standoff voltage (7.5V) and breakdown voltage minimum (8.33V) to provide equivalent protection thresholds. Both parts meet these criteria. However, the SMAJ7.5A-TP has significantly lower peak pulse current (31A vs. 235A) and power rating (400W vs. 4000W), making it suitable only for applications with proportionally lower transient energy levels.

Q: Are the packages interchangeable?

A: Both parts use SMA-class surface-mount packages, but the specific variants differ: SMA6F7.5A-M3/6B uses DO-221AC (SlimSMA) while SMAJ7.5A-TP uses DO-214AC (SMA). PCB footprint compatibility must be verified before substitution, as these packages have different physical dimensions despite similar electrical performance.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SMA6F7.5A-M3/6B and SMAJ7.5A-TP are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings. Both are classified as EAR99 for export control purposes.

Q: What is the primary difference between these two TVS diodes?

A: The primary difference is power handling capacity. The Vishay SMA6F7.5A-M3/6B is rated for 4000W peak pulse power with 235A peak pulse current, while the Micro Commercial Co SMAJ7.5A-TP is rated for 400W peak pulse power with 31A peak pulse current. The clamping voltage also differs (17V vs. 12.9V). Both provide identical 7.5V protection thresholds.

Q: Can I use the lower-power SMAJ7.5A-TP in place of the higher-power SMA6F7.5A-M3/6B?

A: Substitution is only valid if your application's transient energy levels do not exceed the SMAJ7.5A-TP ratings (400W peak pulse, 31A peak pulse current). If your circuit generates transients exceeding these limits, the substitute part will not provide adequate protection and may fail.