STB70NH03LT4 Equivalent & Substitute Parts

Part Overview

The STB70NH03LT4 is an N-Channel MOSFET manufactured by STMicroelectronics, rated for 30V drain-to-source voltage with 60A continuous drain current at 25°C. The device is housed in a D2PAK surface mount package and is part of the STripFET™ III series. This part is classified as obsolete, necessitating identification of equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain compatibility across electrical ratings, thermal characteristics, and mechanical packaging to ensure direct replacement capability.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	60	A
On-Resistance (Rds On) @ 30A, 10V	9.5	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	1	V
Gate Charge (Qg) @ 5V	21	nC
Power Dissipation (Max)	858	W
Operating Temperature Range	-55 to 175	°C
Package Type	D2PAK (TO-263-3)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the STB70NH03LT4 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Drain-to-Source Voltage (Vdss) must equal or exceed 30V
Continuous Drain Current (Id) must meet or exceed 60A at 25°C
On-Resistance (Rds On) characteristics must support equivalent power dissipation performance
Gate threshold voltage and gate charge must be compatible with existing drive circuitry
Maximum operating temperature must span -55°C to 175°C

Mechanical Compatibility Requirements:

Package type must be D2PAK (TO-263-3) for direct PCB footprint compatibility
Surface mount configuration required
Tape & Reel packaging for automated assembly

Regulatory Compliance:

RoHS3 compliance required
REACH unaffected status required
Moisture Sensitivity Level (MSL) of 1 (Unlimited) required

Substitute parts are grouped based on their ability to satisfy these parameters while maintaining functional equivalence in circuit applications.

Parameter Comparison

Parameter	STB70NH03LT4	IRF3709ZSTRRPBF	PSMN4R3-30BL,118	PSMN017-30BL,118
Manufacturer	STMicroelectronics	Infineon Technologies	Nexperia USA Inc.	Nexperia USA Inc.
Vdss (V)	30	30	30	30
Id @ 25°C (A)	60	87	100	32
Rds On (mOhm)	9.5 @ 30A, 10V	6.3 @ 21A, 10V	4.1 @ 15A, 10V	17 @ 10A, 10V
Vgs(th) (V)	1 @ 250µA	2.25 @ 250µA	2.15 @ 1mA	2.15 @ 1mA
Gate Charge (nC)	21 @ 5V	26 @ 4.5V	41.5 @ 10V	10.7 @ 10V
Power Dissipation (W)	858	79	103	47
Operating Temperature (°C)	-55 to 175	-55 to 175	-55 to 175	-55 to 175
Package	D2PAK	D2PAK	D2PAK	D2PAK
Product Status	Obsolete	Not For New Designs	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: PSMN4R3-30BL,118

The PSMN4R3-30BL,118 manufactured by Nexperia USA Inc. is the recommended substitute for the STB70NH03LT4. This part maintains identical Vdss rating (30V) and exceeds the continuous drain current requirement (100A versus 60A). The device features superior on-resistance characteristics (4.1 mOhm versus 9.5 mOhm), enabling improved thermal performance and reduced power dissipation in high-current applications. The part is classified as Active, ensuring long-term availability and supply chain stability. All regulatory requirements are satisfied: ROHS3 compliance, REACH unaffected status, and MSL 1 rating. D2PAK packaging provides direct mechanical compatibility with existing PCB designs.

Secondary Substitute: IRF3709ZSTRRPBF

The IRF3709ZSTRRPBF manufactured by Infineon Technologies meets all electrical and mechanical requirements with 30V Vdss and 87A continuous drain current. On-resistance of 6.3 mOhm provides acceptable thermal performance. The part is classified as Not For New Designs, limiting its suitability for new product development but remaining viable for legacy system maintenance. ROHS3 compliance and D2PAK packaging ensure regulatory and mechanical compatibility.

Tertiary Substitute: PSMN017-30BL,118

The PSMN017-30BL,118 manufactured by Nexperia USA Inc. maintains 30V Vdss rating but provides only 32A continuous drain current, falling below the 60A requirement of the original part. This substitute is suitable only for applications where the actual circuit current demand is lower than the original specification. The part is classified as Obsolete, similar to the STB70NH03LT4. ROHS3 compliance and D2PAK packaging are maintained.

Frequently Asked Questions (FAQ)

Q: Can the PSMN4R3-30BL,118 directly replace the STB70NH03LT4 without circuit modifications?

A: Yes. Both devices share identical Vdss (30V), compatible operating temperature range (-55°C to 175°C), and D2PAK packaging. The PSMN4R3-30BL,118 exceeds the current rating (100A versus 60A) and provides superior on-resistance characteristics. No circuit modifications are required for direct substitution.

Q: What is the significance of the gate threshold voltage difference between STB70NH03LT4 (1V) and substitute parts (2.15V to 2.25V)?

A: Gate threshold voltage determines the gate-source voltage at which the device begins to conduct. The STB70NH03LT4 exhibits a lower threshold (1V), while substitutes range from 2.15V to 2.25V. Drive circuitry must supply sufficient gate voltage to exceed the threshold of the selected substitute. Existing gate drive circuits rated for 5V or 10V operation will function with all listed substitutes.

Q: Why does the PSMN017-30BL,118 have lower power dissipation than the STB70NH03LT4?

A: Power dissipation is directly related to continuous drain current rating. The PSMN017-30BL,118 is rated for 32A continuous current versus 60A for the STB70NH03LT4. Lower current capacity results in lower maximum power dissipation specification (47W versus 858W). This part is suitable only for applications requiring less than 32A continuous current.

Q: Are all substitute parts available in Tape & Reel packaging for automated assembly?

A: Yes. All listed substitute parts are supplied in Tape & Reel (TR) packaging, compatible with standard surface mount assembly equipment and processes.

Q: What is the impact of gate charge differences on circuit performance?

A: Gate charge (Qg) affects switching speed and gate drive power requirements. The STB70NH03LT4 requires 21 nC at 5V, while substitutes range from 10.7 nC to 41.5 nC. Higher gate charge increases switching losses and gate drive current demand. The PSMN017-30BL,118 (10.7 nC) offers the lowest gate charge, reducing drive circuit stress. The PSMN4R3-30BL,118 (41.5 nC) requires higher gate drive capability but remains compatible with standard 5V and 10V drive circuits.

Q: Which substitute is recommended for new product designs?

A: The PSMN4R3-30BL,118 is recommended for new designs. This part carries Active product status, ensuring long-term availability and supply chain continuity. The IRF3709ZSTRRPBF and PSMN017-30BL,118 are classified as Not For New Designs and Obsolete, respectively, and should be reserved for legacy system support and maintenance applications.

Q: Do all parts meet the same regulatory and compliance standards?

A: Yes. All listed parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. All parts are classified under ECCN EAR99 and HTSUS 8541.29.0095, ensuring equivalent regulatory treatment for procurement and export purposes.

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