P6SMB100AT3G Equivalent & Substitute Parts

Part Overview

The P6SMB100AT3G is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a reverse standoff voltage of 85.5V and clamping voltage of 137V at peak pulse current. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	85.5	V
Voltage - Breakdown (Min)	95	V
Voltage - Clamping (Max) @ Ipp	137	V
Current - Peak Pulse (10/1000µs)	4.4	A
Power - Peak Pulse	600	W
Operating Temperature Range	-65 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	—
Type	Zener	—
Unidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution for the P6SMB100AT3G is determined by strict electrical and mechanical compatibility across the following parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 85.5V (or 85V minimum tolerance)
Voltage - Clamping (Max) @ Ipp: 137V (or within specification range)
Current - Peak Pulse (10/1000µs): 4.4A minimum
Package / Case: DO-214AA, SMB (surface mount)
Type: Zener, unidirectional
Operating Temperature: -65°C to 150°C minimum range

Acceptable Variations:

Peak pulse current may exceed 4.4A (higher current rating is acceptable)
Peak pulse power may exceed 600W (higher power rating is acceptable)
Clamping voltage up to 178V is acceptable within the same voltage class
Manufacturer and series designation may differ

Substitute parts are grouped into two categories: direct electrical equivalents (matching all critical parameters) and functional equivalents (meeting minimum electrical requirements with enhanced performance characteristics).

Parameter Comparison

Part Number	Manufacturer	VWM (Typ) V	V(BR) Min V	VC(Max) @ Ipp V	Ipp (10/1000µs) A	Power W	Temp Range °C	Package	Status
P6SMB100AT3G	Littelfuse Inc.	85.5	95	137	4.4	600	-65 to 150	DO-214AA, SMB	Obsolete
P6SMB100A	Eaton - Electronics Division	85.5	95	137	4.5	600	-55 to 150	DO-214AA, SMB	Active
P6SMB100A-E3/52	Vishay General Semiconductor	85.5	95	137	4.4	600	-65 to 150	DO-214AA, SMB	Active
P6SMB100A-M3/52	Vishay General Semiconductor	85.5	95	137	4.4	600	-65 to 150	DO-214AA, SMB	Active
P6SMB100A-M3/5B	Vishay General Semiconductor	85.5	95	137	4.4	600	-65 to 150	DO-214AA, SMB	Active
SM6T100A-M3/52	Vishay General Semiconductor	85.5	95	137	4.4	600	-65 to 150	DO-214AA, SMB	Active
SM6T100A-M3/5B	Vishay General Semiconductor	85.5	95	137	4.4	600	-65 to 150	DO-214AA, SMB	Active
1KSMB100A	Taiwan Semiconductor Corporation	85.5	95	137	7.3	1000	-55 to 175	DO-214AA, SMB	Active
SM6T100A	STMicroelectronics	85.5	95	178	22.5	600	-55 to 150	DO-214AA, SMB	Active
SMBJ85AE3/TR13	Microchip Technology	85	94.4	137	4.4	600	-65 to 150	DO-214AA, SMB	Active

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Substitutes):

P6SMB100A-E3/52, P6SMB100A-M3/52, and P6SMB100A-M3/5B (all Vishay General Semiconductor) provide exact electrical equivalence to the P6SMB100AT3G with identical voltage ratings, current ratings, and operating temperature range. These parts are manufactured under the P6SMB series designation and carry ROHS3 compliance. All three are in active production status.

P6SMB100A (Eaton - Electronics Division) matches all critical electrical parameters with a minor temperature range reduction (-55°C to 150°C versus -65°C to 150°C). This part is suitable for applications not requiring the full lower temperature specification.

Functional Equivalents (Enhanced Performance):

1KSMB100A (Taiwan Semiconductor Corporation) maintains voltage compatibility while providing enhanced current handling (7.3A versus 4.4A) and power dissipation (1000W versus 600W). This part is suitable for applications requiring higher transient current capacity within the same voltage class. Operating temperature range extends to 175°C.

SM6T100A (STMicroelectronics) and SM6T100A-M3/52, SM6T100A-M3/5B (Vishay General Semiconductor) maintain voltage standoff and breakdown specifications while providing significantly higher peak pulse current (22.5A for STMicroelectronics version; 4.4A for Vishay versions) and clamping voltage of 178V. These are suitable for applications requiring enhanced transient suppression performance.

SMBJ85AE3/TR13 (Microchip Technology) provides near-equivalent performance with voltage ratings of 85V standoff and 94.4V breakdown, maintaining 137V clamping voltage and 4.4A peak pulse current. This part is suitable as a secondary alternative.

Compliance and Certification:

All recommended substitute parts carry ROHS3 compliance and REACH unaffected status, matching the original part's regulatory requirements. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Frequently Asked Questions (FAQ)

Q: Can P6SMB100A replace P6SMB100AT3G directly?

A: Yes. P6SMB100A maintains identical electrical specifications (85.5V standoff, 137V clamping, 4.5A peak pulse current). The only difference is the operating temperature range, which is reduced from -65°C to -55°C minimum. For applications operating above -55°C, this substitution is direct. For applications requiring full -65°C operation, use P6SMB100A-E3/52 or P6SMB100A-M3/52 instead.

Q: What is the difference between P6SMB100A-E3/52 and P6SMB100A-M3/52?

A: Both parts are manufactured by Vishay General Semiconductor with identical electrical specifications. The difference is in packaging: P6SMB100A-E3/52 is supplied in Tape & Reel (TR) format, while P6SMB100A-M3/52 is supplied in Tape & Box (TB) format. Electrical performance and pin compatibility are identical.

Q: Can 1KSMB100A be used as a drop-in replacement?

A: 1KSMB100A is electrically compatible in terms of voltage ratings (85.5V standoff, 137V clamping) and package (DO-214AA, SMB). However, it provides enhanced performance with 7.3A peak pulse current versus 4.4A, and 1000W power dissipation versus 600W. This part is suitable for applications requiring higher transient current handling. Operating temperature range extends to 175°C. No circuit modifications are required for substitution.

Q: Why does SM6T100A have a higher clamping voltage (178V)?

A: SM6T100A is designed for enhanced transient suppression with a clamping voltage of 178V while maintaining the same 85.5V standoff voltage. This higher clamping voltage provides additional protection margin in high-energy transient events. The part is suitable for applications where enhanced clamping performance is beneficial. Peak pulse current is significantly higher at 22.5A (8/20µs pulse).

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, matching the original P6SMB100AT3G specification. All parts are also REACH unaffected.

Q: What is the difference between SMB and SMBJ package designations?

A: Both SMB and SMBJ refer to the DO-214AA surface mount package with identical physical dimensions and pin compatibility. The designations reflect different manufacturer conventions. Parts with either designation are mechanically and electrically interchangeable in the same PCB footprint.

Q: Can SMBJ85AE3/TR13 replace P6SMB100AT3G?

A: SMBJ85AE3/TR13 is compatible with slightly different voltage specifications: 85V standoff (versus 85.5V) and 94.4V breakdown (versus 95V). Clamping voltage and peak pulse current match at 137V and 4.4A respectively. This part is suitable as a secondary alternative when primary substitutes are unavailable. Operating temperature range matches at -65°C to 150°C.

Q: What is the inventory status of substitute parts?

A: P6SMB100A-E3/52 has the highest inventory (22,800 pcs), followed by SM6T100A (22,600 pcs). P6SMB100A (Eaton) has 7,372 pcs available. Other variants have lower inventory levels (720–1,026 pcs). For high-volume procurement, P6SMB100A-E3/52 or SM6T100A are recommended based on availability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message