P6SMB150AT3 Equivalent & Substitute Parts

Part Overview

The P6SMB150AT3 is a unidirectional transient voltage suppressor (TVS) diode manufactured by onsemi, designed for surface mount applications in the DO-214AA (SMB) package. This component provides transient overvoltage protection with a 128V reverse standoff voltage and 207V maximum clamping voltage at peak pulse current. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Reverse Standoff Voltage (Typ)	128	V
Breakdown Voltage (Min)	143	V
Clamping Voltage (Max) @ Ipp	207	V
Peak Pulse Current (10/1000µs)	2.9	A
Peak Pulse Power	600	W
Operating Temperature Range	-65 to 150	°C (TJ)
Package Type	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Unidirectional Channels	1	—
Capacitance @ 1MHz	150	pF

Substitute Part Grouping Explanation

Substitution eligibility for the P6SMB150AT3 is determined by the following critical parameters:

Reverse Standoff Voltage (Typ): 128V ±tolerance
Breakdown Voltage (Min): 143V minimum
Clamping Voltage (Max) @ Ipp: 207V maximum
Peak Pulse Current (10/1000µs): 2.9A minimum
Peak Pulse Power: 600W minimum
Package Type: DO-214AA (SMB) surface mount
Unidirectional Configuration: Single channel

Substitute parts are classified into two categories:

Direct Substitutes maintain identical electrical specifications across all critical parameters and support pin-for-pin replacement without circuit modification.

Similar Substitutes share the same package, mounting type, and core voltage protection characteristics but may exhibit variations in peak pulse current, clamping voltage, or operating temperature range. These parts are functionally compatible for the same application class but require verification of specific circuit requirements.

Parameter Comparison

Part Number	Manufacturer	Standoff Voltage (V)	Breakdown Min (V)	Clamp Voltage Max (V)	Peak Pulse Current (A)	Peak Power (W)	Temp Range (°C)	Package	Status	RoHS
P6SMB150AT3	onsemi	128	143	207	2.9	600	-65 to 150	DO-214AA (SMB)	Obsolete	Non-compliant
P6SMB150A	Good-Ark Semiconductor	128	143	207	2.9	600	-55 to 150	DO-214AA (SMB)	Active	ROHS3 Compliant
1KSMB150A	Littelfuse Inc.	128	143	207	4.8	1000	-55 to 150	DO-214AA (SMB)	Active	ROHS3 Compliant
SM6T150A	STMicroelectronics	128	143	265	15 (8/20µs)	600	-55 to 150	DO-214AA (SMB)	Active	ROHS3 Compliant
SM6T150A-M3/52	Vishay General Semiconductor	128	143	207	2.9	600	-65 to 150	DO-214AA (SMB)	Active	ROHS3 Compliant
SM6T150A-M3/5B	Vishay General Semiconductor	128	143	207	2.9	600	-65 to 150	DO-214AA (SMB)	Active	ROHS3 Compliant
SMBJ130A	MDD	130	144	209	2.9	600	-50 to 150	DO-214AA (SMB)	Active	ROHS3 Compliant
SMBJ150A	MDD	150	167	243	2.5	600	-50 to 150	DO-214AA (SMB)	Active	ROHS3 Compliant
SMBJP6KE150A-TP	Micro Commercial Co	128	143	207	2.9	600	-55 to 175	DO-214AA (SMB)	Active	ROHS3 Compliant
TVP06B151A-G	Comchip Technology	128	142.5	207	2.9	600	-55 to 150	DO-214AA (SMB)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Preferred Direct Substitutes (identical electrical specifications, active product status, RoHS3 compliant):

P6SMB150A (Good-Ark Semiconductor): Exact electrical match with -55°C lower operating temperature limit. Highest inventory availability (41,700 pcs). Recommended for new designs and high-volume procurement.
SM6T150A-M3/52 and SM6T150A-M3/5B (Vishay General Semiconductor): Exact electrical match with extended temperature range (-65°C to 150°C), matching the original part. TransZorb® series qualification. Lower inventory levels suitable for replacement applications.
SMBJP6KE150A-TP (Micro Commercial Co): Exact electrical match with extended upper temperature limit (-55°C to 175°C). Suitable for high-temperature environments.
TVP06B151A-G (Comchip Technology): Exact electrical match with minimal breakdown voltage variation (142.5V vs. 143V). Active status with RoHS3 compliance.

Enhanced Performance Alternatives (higher current/power ratings, same voltage class):

1KSMB150A (Littelfuse Inc.): Maintains identical voltage specifications but provides 4.8A peak pulse current and 1000W peak power (vs. 2.9A/600W). Suitable for applications requiring higher transient energy absorption. High inventory availability (30,200 pcs).

Voltage-Shifted Alternatives (similar protection class, different voltage rating):

SMBJ130A (MDD): 130V standoff voltage with 209V clamping. Suitable for lower voltage protection circuits. Not recommended as direct replacement without circuit analysis.
SMBJ150A (MDD): 150V standoff voltage with 243V clamping. Suitable for higher voltage protection circuits. Not recommended as direct replacement without circuit analysis.

All recommended substitutes are RoHS3 compliant and carry active product status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can P6SMB150A be used as a direct replacement for P6SMB150AT3?

A: Yes. P6SMB150A maintains identical electrical specifications (128V standoff, 143V breakdown minimum, 207V clamping maximum, 2.9A peak pulse current, 600W peak power) and uses the same DO-214AA (SMB) package. The only difference is the lower operating temperature limit (-55°C vs. -65°C). For applications operating above -55°C, this part is a direct substitute.

Q: What is the difference between direct substitutes and similar substitutes?

A: Direct substitutes match all critical electrical parameters and support pin-for-pin replacement without circuit modification. Similar substitutes share the same package and voltage protection class but may have different peak pulse current ratings, clamping voltages, or temperature ranges. Similar substitutes require circuit-level verification before implementation.

Q: Why does 1KSMB150A have higher peak pulse current (4.8A) than the original part (2.9A)?

A: The 1KSMB150A is a higher-power variant of the same voltage class. It maintains identical voltage specifications but is designed for applications requiring greater transient energy absorption. It can be used as a substitute if the circuit can accommodate the higher current rating, but it is not necessary for applications designed for 2.9A.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed are RoHS3 compliant. The original P6SMB150AT3 is RoHS non-compliant due to its obsolete status. RoHS3 compliance is required for new designs and procurement in most regulated markets.

Q: Can SMBJ130A or SMBJ150A be used instead of P6SMB150AT3?

A: These parts use the same DO-214AA (SMB) package but have different voltage ratings (130V and 150V standoff, respectively). They are not direct substitutes. Use only if your circuit design specifically requires these voltage ratings. Verify circuit protection requirements before substitution.

Q: What is the temperature range consideration for substitute selection?

A: The original P6SMB150AT3 operates from -65°C to 150°C. Most active substitutes operate from -55°C to 150°C, which is acceptable for most applications. SM6T150A-M3/52, SM6T150A-M3/5B, and SMBJP6KE150A-TP offer extended ranges (-65°C to 150°C or -55°C to 175°C) for temperature-critical applications.

Q: Is inventory availability a factor in substitute selection?

A: Yes. P6SMB150A has the highest inventory (41,700 pcs), followed by SMBJ150A (71,200 pcs) and 1KSMB150A (30,200 pcs). Lower inventory parts (SM6T150A-M3/52 with 822 pcs, SM6T150A-M3/5B with 778 pcs) are suitable for replacement applications but may not support high-volume new designs.

Q: Can the package type be changed during substitution?

A: No. All substitute parts use the DO-214AA (SMB) surface mount package, matching the original part. Package compatibility is mandatory for PCB assembly without redesign.

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