P6SMB100AT3 Equivalent & Substitute Parts

Part Overview

The P6SMB100AT3 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for surface mount applications in the DO-214AA (SMB) package. This unidirectional Zener diode provides 137V clamping voltage with 4.4A peak pulse current capability and 600W peak pulse power dissipation. The device is qualified to AEC-Q101 automotive standards and operates across -65°C to 150°C junction temperature range.

The P6SMB100AT3 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications requiring 85.5V reverse standoff voltage protection.

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	—
Capacitance @ 1MHz	215	pF

Substitute Part Grouping Explanation

Substitution eligibility for the P6SMB100AT3 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Parameters:

Voltage - Reverse Standoff (Typ): 85.5V (tolerance: ±5%)
Voltage - Breakdown (Min): 95V minimum
Voltage - Clamping (Max) @ Ipp: 137V maximum
Current - Peak Pulse (10/1000µs): 4.4A minimum
Power - Peak Pulse: 600W minimum
Package / Case: DO-214AA or SMB equivalent
Type: Zener, unidirectional
Unidirectional Channels: 1

Substitute Classification:

Direct Substitutes maintain identical electrical specifications and active product status:

P6SMB100A (Eaton - Electronics Division)

Similar Substitutes meet or exceed all critical electrical parameters with variations in secondary characteristics:

1KSMB100A (Taiwan Semiconductor Corporation) — higher peak pulse current (7.3A) and power (1kW)
P6SMB100A-M3/52 (Vishay General Semiconductor - Diodes Division)
P6SMB100A-M3/5B (Vishay General Semiconductor - Diodes Division)
SM6T100A (STMicroelectronics) — higher clamping voltage (178V) and peak pulse current (22.5A)
SM6T100A-M3/52 (Vishay General Semiconductor - Diodes Division)
SM6T100A-M3/5B (Vishay General Semiconductor - Diodes Division)
SMBJ85AE3/TR13 (Microchip Technology) — 85V reverse standoff (0.5V variance)
SMBJP6KE100A-TP (Micro Commercial Co)

All substitute parts maintain the DO-214AA (SMB) package form factor, unidirectional Zener topology, and surface mount mounting type required for direct PCB replacement.

Parameter Comparison

Part Number	Manufacturer	VWM (Typ) [V]	VBR (Min) [V]	VC (Max) [V]	Ipp [A]	PPP [W]	Temp Range [°C]	Status	RoHS
P6SMB100AT3	onsemi	85.5	95	137	4.4	600	-65 to 150	Obsolete	Non-compliant
P6SMB100A	Eaton	85.5	95	137	4.5	600	-55 to 150	Active	Compliant
1KSMB100A	Taiwan Semiconductor	85.5	95	137	7.3	1000	-55 to 175	Active	Compliant
P6SMB100A-M3/52	Vishay	85.5	95	137	4.4	600	-65 to 150	Active	Compliant
P6SMB100A-M3/5B	Vishay	85.5	95	137	4.4	600	-65 to 150	Active	Compliant
SM6T100A	STMicroelectronics	85.5	95	178	22.5	600	-55 to 150	Active	Compliant
SM6T100A-M3/52	Vishay	85.5	95	137	4.4	600	-65 to 150	Active	Compliant
SM6T100A-M3/5B	Vishay	85.5	95	137	4.4	600	-65 to 150	Active	Compliant
SMBJ85AE3/TR13	Microchip Technology	85	94.4	137	4.4	600	-65 to 150	Active	Compliant
SMBJP6KE100A-TP	Micro Commercial Co	85.5	95	137	4.5	600	-55 to 175	Active	Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): P6SMB100A (Eaton - Electronics Division) is the primary direct substitute. It maintains 85.5V reverse standoff voltage, 137V clamping voltage, and 600W peak pulse power. The device is active in production status and RoHS compliant, addressing supply continuity and regulatory requirements. Operating temperature range is -55°C to 150°C, which covers the majority of industrial and commercial applications. Peak pulse current is 4.5A, marginally exceeding the original 4.4A specification.

For Enhanced Performance Requirements: 1KSMB100A (Taiwan Semiconductor Corporation) provides higher peak pulse current (7.3A) and peak pulse power (1kW) while maintaining the same voltage protection window. Operating temperature extends to 175°C. This option is suitable for applications requiring additional transient energy absorption margin.

For Automotive and Extended Temperature Applications: P6SMB100A-M3/52 and P6SMB100A-M3/5B (Vishay General Semiconductor - Diodes Division) maintain the full -65°C to 150°C operating range of the original part. Both are active, RoHS compliant, and available in Tape & Box packaging. These variants preserve the exact electrical specifications and temperature performance of the P6SMB100AT3.

For High-Current Transient Protection: SM6T100A (STMicroelectronics) offers 22.5A peak pulse current with 178V clamping voltage, providing superior transient suppression capability. This part is suitable for applications experiencing higher energy transients while maintaining the 85.5V reverse standoff voltage threshold.

For Voltage-Sensitive Applications: SMBJ85AE3/TR13 (Microchip Technology) operates at 85V reverse standoff voltage (0.5V lower than the original specification) with identical clamping voltage and peak pulse current. This part is suitable only where the lower standoff voltage is acceptable within circuit design margins.

All recommended substitutes are active in production status and RoHS compliant, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can P6SMB100A be used as a direct replacement for P6SMB100AT3? A: Yes. P6SMB100A meets all critical electrical parameters: 85.5V reverse standoff voltage, 95V minimum breakdown voltage, 137V clamping voltage, and 4.5A peak pulse current. Both devices use the DO-214AA (SMB) package. The primary difference is product status (P6SMB100A is active; P6SMB100AT3 is obsolete) and RoHS compliance (P6SMB100A is compliant).

Q: What is the difference between similar substitutes like 1KSMB100A and SM6T100A? A: Both exceed the original specifications but in different ways. 1KSMB100A provides higher peak pulse current (7.3A) and power (1kW) while maintaining 137V clamping voltage. SM6T100A provides significantly higher peak pulse current (22.5A) but with elevated clamping voltage (178V). Selection depends on whether the application requires higher current capacity (1KSMB100A) or can tolerate higher clamping voltage (SM6T100A).

Q: Are all substitute parts available in the same SMB package? A: Yes. All substitute parts use the DO-214AA (SMB) or SMBJ (DO-214AA) package designation, ensuring mechanical and electrical compatibility with existing PCB layouts. Supplier device package designations may vary (SMB, SMBJ, DO-214AA), but all are physically and functionally equivalent.

Q: What is the impact of operating temperature range differences? A: The original P6SMB100AT3 operates from -65°C to 150°C. Some substitutes (P6SMB100A, SMBJP6KE100A-TP) have a lower limit of -55°C, which is acceptable for most industrial and commercial applications. Vishay variants (P6SMB100A-M3/52, P6SMB100A-M3/5B, SM6T100A-M3/52, SM6T100A-M3/5B) maintain the full -65°C to 150°C range. For automotive or extreme cold-weather applications, select parts with -65°C minimum rating.

Q: Why do some substitutes have higher clamping voltages? A: Higher clamping voltage (such as SM6T100A at 178V versus 137V) indicates the device allows greater voltage transient peaks before suppression. This is acceptable in applications where the circuit can tolerate higher transient voltages. However, if the original design requires strict 137V clamping, select substitutes maintaining this specification.

Q: What does RoHS compliance mean for this component? A: RoHS (Restriction of Hazardous Substances) compliance indicates the part does not contain lead, cadmium, mercury, or other restricted materials. The original P6SMB100AT3 is RoHS non-compliant. All active substitute parts are RoHS compliant, meeting current regulatory requirements for new designs and manufacturing in regulated markets.

Q: Can SMBJ85AE3/TR13 be used if the application requires exactly 85.5V standoff voltage? A: SMBJ85AE3/TR13 operates at 85V reverse standoff voltage, which is 0.5V lower than the original specification. This part is suitable only if circuit design margins accommodate the lower standoff voltage. For applications requiring strict 85.5V protection, select P6SMB100A, 1KSMB100A, or Vishay variants.

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