STB95N3LLH6 Equivalent & Substitute Parts

Part Overview

The STB95N3LLH6 is an N-Channel 30V 80A MOSFET manufactured by STMicroelectronics in the DeepGATE™ and STripFET™ VI series. This device is packaged in TO-263 (D2PAK) surface mount configuration with a maximum power dissipation of 70W at case temperature. The part is classified as Obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	80	A
Rds On (Max) @ 40A, 10V	4.2	mOhm
Power Dissipation (Max)	70	W
Gate Charge (Qg) @ 4.5V	24.5	nC
Input Capacitance (Ciss) @ 25V	2200	pF
Operating Temperature (TJ)	175	°C
Package Type	TO-263-3 (D2PAK)	-
Mounting Type	Surface Mount	-

Substitute Part Grouping Explanation

Substitution of the STB95N3LLH6 is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a Drain to Source Voltage (Vdss) of 30V or higher to ensure compatibility with the original design specifications.

Current Rating: Substitute parts must support a continuous drain current (Id) at or above 80A at 25°C to meet or exceed the original device performance.

On-Resistance (Rds On): The maximum on-resistance must be comparable to the original 4.2mOhm specification to maintain thermal and efficiency characteristics within acceptable design margins.

Package and Mounting: All substitutes must use the TO-263-3 (D2PAK) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Compliance and Status: Substitute parts must maintain RoHS3 compliance and appropriate product status for the intended application lifecycle.

The substitute parts are grouped into two categories: direct current-rated alternatives (80A–100A range) and higher-current alternatives (140A–150A range) that provide enhanced performance headroom.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On Max (mOhm)	Power Dissipation (W)	Qg @ 4.5V (nC)	Ciss @ Vds (pF)	Package	Product Status
STB95N3LLH6	STMicroelectronics	30	80	4.2 @ 40A, 10V	70	24.5	2200 @ 25V	TO-263-3 (D2PAK)	Obsolete
IRF3709ZSTRRPBF	Infineon Technologies	30	87	6.3 @ 21A, 10V	79	26	2130 @ 15V	TO-263-3 (D2PAK)	Not For New Designs
IRL3803STRLPBF	Infineon Technologies	30	140	6 @ 71A, 10V	200	140	5000 @ 25V	TO-263-3 (D2PAK)	Not For New Designs
IRL7833STRLPBF	Infineon Technologies	30	150	3.8 @ 38A, 10V	140	47	4170 @ 15V	TO-263-3 (D2PAK)	Not For New Designs
PHB66NQ03LT,118	Nexperia USA Inc.	25	66	10.5 @ 25A, 10V	93	12	860 @ 25V	TO-263-3 (D2PAK)	Obsolete
PSMN017-30BL,118	Nexperia USA Inc.	30	32	17 @ 10A, 10V	47	10.7	552 @ 15V	TO-263-3 (D2PAK)	Obsolete
PSMN4R3-30BL,118	Nexperia USA Inc.	30	100	4.1 @ 15A, 10V	103	41.5	2400 @ 15V	TO-263-3 (D2PAK)	Active

Engineering Selection Recommendations

Primary Substitute: PSMN4R3-30BL,118

The PSMN4R3-30BL,118 from Nexperia USA Inc. is the recommended substitute for the STB95N3LLH6. This device maintains the 30V voltage rating and provides 100A continuous drain current, exceeding the original 80A specification. The on-resistance of 4.1mOhm at 15A, 10V is comparable to the original device, ensuring thermal performance remains within acceptable design parameters. The part is currently in Active product status, ensuring long-term availability and supply chain stability. RoHS3 compliance and MSL 1 rating match the original device specifications.

Secondary Substitute: IRF3709ZSTRRPBF

The IRF3709ZSTRRPBF from Infineon Technologies provides 87A continuous drain current at 30V, closely matching the original 80A specification. Power dissipation of 79W exceeds the original 70W rating, providing thermal headroom. This device is classified as Not For New Designs, limiting its suitability for new product development but remaining viable for legacy system maintenance.

Higher-Current Alternatives: IRL7833STRLPBF and IRL3803STRLPBF

The IRL7833STRLPBF and IRL3803STRLPBF offer significantly higher current ratings (150A and 140A respectively) with improved on-resistance characteristics. These devices are suitable for applications requiring enhanced performance margins or thermal management improvements. Both are classified as Not For New Designs.

Not Recommended: PHB66NQ03LT,118 and PSMN017-30BL,118

The PHB66NQ03LT,118 operates at 25V, below the required 30V specification, and provides only 66A current rating. The PSMN017-30BL,118 provides only 32A current rating, insufficient for the original 80A requirement. Both parts are Obsolete and do not meet the electrical requirements of the original design.

Frequently Asked Questions (FAQ)

Q: Can the PHB66NQ03LT,118 substitute for the STB95N3LLH6?

A: No. The PHB66NQ03LT,118 has a maximum Vdss rating of 25V, which is below the required 30V specification. Additionally, its 66A current rating does not meet the 80A requirement. This part is not suitable for direct substitution.

Q: What is the difference between the PSMN4R3-30BL,118 and the IRL7833STRLPBF?

A: Both devices maintain 30V voltage rating and TO-263-3 packaging. The PSMN4R3-30BL,118 provides 100A at 4.1mOhm on-resistance and is currently Active. The IRL7833STRLPBF provides 150A at 3.8mOhm on-resistance but is classified as Not For New Designs. The PSMN4R3-30BL,118 is preferred for new designs due to its Active status and supply availability.

Q: Is the PSMN017-30BL,118 a suitable substitute?

A: No. The PSMN017-30BL,118 provides only 32A continuous drain current, which is significantly below the required 80A specification. This part cannot support the electrical requirements of the original design.

Q: Why is product status important in selecting a substitute?

A: Product status indicates manufacturer support and supply chain availability. Active parts ensure long-term availability and continued manufacturing support. Obsolete and Not For New Designs classifications indicate limited or discontinued production, affecting supply reliability and future design flexibility.

Q: Can I use a higher-current rated device as a substitute?

A: Yes. Devices with higher current ratings (such as the IRL7833STRLPBF at 150A) can substitute for the STB95N3LLH6 provided all other electrical parameters remain compatible. Higher current ratings provide performance headroom and thermal margin. Verify that on-resistance, gate charge, and input capacitance remain within acceptable design tolerances.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain RoHS3 compliance and MSL 1 rating, matching the original device specifications.

Q: What is the significance of on-resistance (Rds On) in substitution?

A: On-resistance directly affects power dissipation and thermal performance. Lower on-resistance reduces heat generation at equivalent current levels. The original device specifies 4.2mOhm at 40A, 10V. Substitute parts with comparable or lower on-resistance maintain thermal characteristics within design specifications.

Q: Does package type affect substitution compatibility?

A: Yes. All substitute parts must use the TO-263-3 (D2PAK) surface mount package to ensure mechanical compatibility with existing PCB layouts and thermal management designs. Package changes require PCB redesign and thermal analysis.

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