SM6T68A-M3/52 Equivalent & Substitute Parts

Part Overview

The SM6T68A-M3/52 is an active-status Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This unidirectional zener diode operates with a reverse standoff voltage of 58.1V and provides 92V maximum clamping voltage at peak pulse current. The device is packaged in DO-214AA (SMB) surface mount configuration and is ROHS3 compliant with unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified when designs require alternative sourcing, inventory availability, or when specific performance enhancements within the same electrical specification range are acceptable.

Substiute Parts

SM6T68A-M3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 842SM6T68A-M3/52 Datasheet

Current PartRFQ

P6SMB68A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 6338P6SMB68A-E3/52 Datasheet

DirectRFQ

1KSMB68A

Taiwan Semiconductor CorporationIn Stock: 573381KSMB68A Datasheet

MFR RecommendedRFQ

P6SMB68A

Eaton - Electronics DivisionIn Stock: 32269P6SMB68A Datasheet

MFR RecommendedRFQ

P6SMB68A

Eaton - Electronics DivisionIn Stock: 32269P6SMB68A Datasheet

MFR RecommendedRFQ

SMBJP6KE68A-TP

Micro Commercial CoIn Stock: 5551SMBJP6KE68A-TP Datasheet

MFR RecommendedRFQ

TPSMB68A

Littelfuse Inc.In Stock: 3541TPSMB68A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SM6T68A-M3/52 are grouped based on strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 58.1V
• Voltage - Clamping (Max) @ Ipp: 92V
• Voltage - Breakdown (Min): 64.6V
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional

Acceptable Variation Range:

• Current - Peak Pulse (10/1000µs): 6.5A minimum (higher values acceptable)
• Power - Peak Pulse: 600W minimum (higher values acceptable)
• Operating Temperature: -55°C to 175°C acceptable (encompasses or matches primary range)
• RoHS Status: ROHS3 Compliant or RoHS Compliant

Parts meeting these criteria are electrically interchangeable for general-purpose transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Preferred for Drop-In Replacement): P6SMB68A-E3/52 from Vishay General Semiconductor matches all electrical parameters and operating temperature range of the primary part. Both devices share identical voltage specifications, current ratings, and power dissipation characteristics.

Enhanced Performance Alternative: 1KSMB68A from Taiwan Semiconductor Corporation provides higher peak pulse current (10.9A vs. 6.5A) and increased power dissipation (1000W vs. 600W) while maintaining identical voltage clamping characteristics. This part is suitable for applications requiring higher transient energy absorption. Operating temperature range extends to 175°C maximum.

Automotive-Grade Alternative: TPSMB68A from Littelfuse Inc. is qualified to AEC-Q101 automotive standard and extends operating temperature to -65°C to 175°C. This part is appropriate for automotive and harsh-environment applications requiring enhanced reliability qualification.

Alternative Sourcing: SMBJP6KE68A-TP from Micro Commercial Co provides equivalent electrical performance with extended temperature range (-55°C to 175°C) and maintains ROHS3 compliance.

All substitute parts listed maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring compatibility with standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can P6SMB68A-E3/52 replace SM6T68A-M3/52 directly? A: Yes. Both parts share identical voltage specifications (58.1V standoff, 92V clamping), current rating (6.5A peak pulse), and power dissipation (600W). The primary difference is the series designation (P6SMB vs. SM6T) and packaging variant (SMB vs. SMBJ), both of which are DO-214AA surface mount packages. Direct substitution is electrically valid.

Q: What is the difference between 1KSMB68A and SM6T68A-M3/52? A: The 1KSMB68A provides enhanced performance with higher peak pulse current (10.9A vs. 6.5A) and increased power dissipation (1000W vs. 600W). Voltage clamping characteristics remain identical. The 1KSMB68A also extends maximum operating temperature to 175°C. This part is suitable for applications requiring higher transient energy handling within the same voltage protection window.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance. One alternative (P6SMB68A from Eaton) carries RoHS compliance without the "3" designation, which remains acceptable for most applications.

Q: What is the significance of the SMBJ vs. SMB package designation? A: Both SMBJ and SMB refer to DO-214AA surface mount packages. SMBJ typically indicates a variant with enhanced mechanical robustness or specific lead configuration. Electrically, both are compatible for the same PCB footprint and application requirements.

Q: Can TPSMB68A be used in non-automotive applications? A: Yes. TPSMB68A is qualified to AEC-Q101 automotive standard but is not restricted to automotive use. The automotive qualification indicates enhanced reliability testing and is acceptable for general-purpose applications. The extended operating temperature range (-65°C to 175°C) provides additional margin for harsh-environment applications.

Q: What inventory considerations apply to these substitutes? A: P6SMB68A-E3/52 has 6,300 pieces in stock. 1KSMB68A has 57,300 pieces available. SMBJP6KE68A-TP has 5,516 pieces in stock. TPSMB68A has 3,453 pieces available. Inventory levels may influence sourcing decisions for high-volume production requirements.