IRLB3034PBF N-Channel 40V 195A MOSFET Equivalent & Substitute Parts

Part Overview

The IRLB3034PBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 40V drain-to-source voltage with 195A continuous drain current at 25°C. This device is packaged in TO-220AB through-hole configuration and is part of the HEXFET® series. The part is designated as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent or substitute parts is necessary for ongoing production support, maintenance applications, and legacy system repairs where the original part is no longer readily available or where design flexibility permits component substitution within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	40	V
Continuous Drain Current (Id) @ 25°C	195	A (Tc)
On-Resistance (Rds On Max) @ 195A, 10V	1.7	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ 250µA	2.5	V
Gate Charge (Qg Max) @ 4.5V	162	nC
Maximum Gate Voltage (Vgs Max)	±20	V
Input Capacitance (Ciss Max) @ 25V	10315	pF
Power Dissipation (Max)	375	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-220AB	Through Hole
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the IRLB3034PBF is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 40V
Continuous Drain Current (Id): Must equal or exceed 195A at 25°C
On-Resistance (Rds On): Must not exceed 1.7 mOhm at rated current and gate voltage
Gate Threshold Voltage (Vgs(th)): Must be compatible with 2.5V maximum specification
Maximum Gate Voltage (Vgs Max): Must support ±20V operation
Operating Temperature Range: Must span -55°C to 175°C
Package Type: Must be TO-220AB through-hole configuration
Compliance: Must maintain ROHS3 compliance and MSL 1 rating

Substitute Parts Identified:

IRLB3034PBFXKMA1 (Infineon Technologies) – Parametric equivalent with identical electrical specifications and Active product status
PSMN1R9-40PLQ (Nexperia USA Inc.) – Reduced current rating (150A) with comparable Rds On performance
PSMN2R2-40PS,127 (Nexperia USA Inc.) – Further reduced current rating (100A) with higher Rds On
PSMN4R5-40PS,127 (Nexperia USA Inc.) – Reduced current rating (100A) with significantly higher Rds On
PSMN8R0-40PS,127 (Nexperia USA Inc.) – Lowest current rating (77A) with highest Rds On among substitutes

All substitute parts maintain 40V Vdss rating, TO-220AB packaging, ±20V Vgs maximum, and -55°C to 175°C operating temperature range. Substitution feasibility depends on application current requirements and thermal management capabilities.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On Max (mOhm)	Vgs(th) Max (V)	Qg Max (nC)	Ciss Max (pF)	Power Diss (W)	Temp Range (°C)	Package	Product Status
IRLB3034PBF	Infineon	40	195	1.7	2.5	162	10315	375	-55 to 175	TO-220AB	Not For New Designs
IRLB3034PBFXKMA1	Infineon	40	195	1.7	2.5	162	10315	375	-55 to 175	TO-220AB	Active
PSMN1R9-40PLQ	Nexperia	40	150	1.7	2.1	120	13200	349	-55 to 175	TO-220AB	Obsolete
PSMN2R2-40PS,127	Nexperia	40	100	2.1	4.0	130	8423	306	-55 to 175	TO-220AB	Obsolete
PSMN4R5-40PS,127	Nexperia	40	100	4.6	4.0	42.3	2683	148	-55 to 175	TO-220AB	Obsolete
PSMN8R0-40PS,127	Nexperia	40	77	7.6	4.0	21	1262	86	-55 to 175	TO-220AB	Obsolete

Engineering Selection Recommendations

Primary Recommendation: IRLB3034PBFXKMA1

The IRLB3034PBFXKMA1 is the direct parametric equivalent to the IRLB3034PBF. This part maintains identical electrical specifications across all critical parameters: 40V Vdss, 195A continuous drain current, 1.7 mOhm Rds On, and 375W power dissipation. The IRLB3034PBFXKMA1 carries Active product status, ensuring ongoing availability and manufacturing support. Both parts are ROHS3 compliant with MSL 1 rating. This substitute provides seamless compatibility for applications requiring the full 195A current capability of the original IRLB3034PBF.

Secondary Recommendations: Nexperia PSMN Series

The Nexperia PSMN1R9-40PLQ, PSMN2R2-40PS,127, PSMN4R5-40PS,127, and PSMN8R0-40PS,127 are suitable substitutes only for applications where the required continuous drain current is lower than the IRLB3034PBF specification. These parts maintain the 40V Vdss rating and TO-220AB packaging but offer progressively reduced current ratings (150A, 100A, 100A, and 77A respectively). All Nexperia substitutes maintain the -55°C to 175°C operating temperature range and ROHS3 compliance.

Substitution Constraints:

Applications requiring 195A continuous drain current must use IRLB3034PBFXKMA1
Applications requiring 150A or less may use PSMN1R9-40PLQ
Applications requiring 100A or less may use PSMN2R2-40PS,127 or PSMN4R5-40PS,127
Applications requiring 77A or less may use PSMN8R0-40PS,127
All substitutes are Obsolete or Not For New Designs status; verify long-term availability before design commitment
Thermal management design must account for increased Rds On values in lower-current Nexperia alternatives

Frequently Asked Questions (FAQ)

Q1: Can IRLB3034PBFXKMA1 be used as a direct replacement for IRLB3034PBF?

A: Yes. The IRLB3034PBFXKMA1 is a parametric equivalent with identical electrical and mechanical specifications. It maintains 40V Vdss, 195A continuous drain current, 1.7 mOhm Rds On, and TO-220AB packaging. The primary advantage is Active product status, ensuring continued availability compared to the Not For New Designs status of the original IRLB3034PBF.

Q2: Why do the Nexperia PSMN parts have different current ratings?

A: The Nexperia PSMN series represents a product family with varying on-resistance and current ratings within the same 40V voltage class and TO-220AB package. PSMN1R9-40PLQ is rated for 150A, while PSMN2R2-40PS,127, PSMN4R5-40PS,127, and PSMN8R0-40PS,127 are rated for 100A, 100A, and 77A respectively. Selection depends on application current requirements.

Q3: What is the impact of higher Rds On values in substitute parts?

A: Higher on-resistance increases power dissipation at the same current level. For example, PSMN4R5-40PS,127 has 4.6 mOhm Rds On compared to 1.7 mOhm in the IRLB3034PBF. This results in approximately 2.7 times greater resistive losses at equivalent current. Thermal design must accommodate this increased dissipation through enhanced heatsinking or reduced operating current.

Q4: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts, including IRLB3034PBFXKMA1 and the Nexperia PSMN series, maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original IRLB3034PBF specifications.

Q5: Can lower-current Nexperia parts be used in applications designed for 195A?

A: No. Applications requiring 195A continuous drain current must use IRLB3034PBFXKMA1. Using lower-current substitutes (PSMN1R9-40PLQ at 150A or PSMN series at 100A or 77A) in 195A applications will result in device thermal stress, reduced reliability, and potential failure. Current rating must not be exceeded.

Q6: What is the difference between gate charge specifications across substitutes?

A: Gate charge (Qg) varies from 162 nC in IRLB3034PBF to 21 nC in PSMN8R0-40PS,127. Lower gate charge reduces driver power requirements and switching losses. However, gate charge is not a substitution-limiting parameter if the gate driver can supply the required charge within the specified voltage and timing constraints.

Q7: How do input capacitance differences affect circuit design?

A: Input capacitance (Ciss) ranges from 1262 pF in PSMN8R0-40PS,127 to 13200 pF in PSMN1R9-40PLQ. Higher capacitance increases gate driver current requirements and switching transition times. Circuit designs must verify that gate drivers can supply sufficient current to charge the input capacitance within required switching frequency and rise/fall time specifications.

Q8: Are all substitute parts available in the same packaging?

A: Yes. All identified substitutes use TO-220AB through-hole packaging, matching the IRLB3034PBF. This ensures mechanical compatibility with existing PCB layouts and heatsink mounting configurations.

Q9: What is the significance of product status (Active vs. Obsolete vs. Not For New Designs)?

A: Product status indicates lifecycle stage. IRLB3034PBFXKMA1 is Active, ensuring ongoing manufacturing and supply. IRLB3034PBF is Not For New Designs, indicating end-of-life. Nexperia PSMN parts are Obsolete, indicating discontinued production. For new designs, IRLB3034PBFXKMA1 is preferred. For legacy support, verify availability with distributors before committing to Obsolete alternatives.

Q10: Can gate threshold voltage differences affect circuit operation?

A: Gate threshold voltage (Vgs(th)) ranges from 2.1V in PSMN1R9-40PLQ to 4.0V in Nexperia PSMN2R2, PSMN4R5, and PSMN8R0 series. Higher threshold voltage requires higher gate drive voltage to achieve full on-state conduction. Gate drivers must supply sufficient voltage to exceed the substitute part's Vgs(th) specification while remaining within the ±20V maximum gate voltage rating.

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