SI3433CDV-T1-E3 Equivalent & Substitute Parts

Part Overview

The SI3433CDV-T1-E3 is a P-Channel MOSFET manufactured by Vishay Siliconix, rated for 20V drain-to-source voltage with 6A continuous drain current at 25°C. This device operates in the TrenchFET® series and is housed in a 6-TSOP surface mount package. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are necessary when the SI3433CDV-T1-E3 reaches end-of-life inventory constraints, when alternative sourcing is required for supply chain resilience, or when design flexibility permits selection from equivalent devices meeting identical electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	20	V
Continuous Drain Current (Id) @ 25°C	6	A
Rds On (Max) @ 5.2A, 4.5V Vgs	38	mOhm
Gate Charge (Qg) @ 8V Vgs	45	nC
Input Capacitance (Ciss) @ 10V Vds	1300	pF
Power Dissipation (Max)	3.3	W
Operating Temperature Range	-55 to 150	°C
Package Type	6-TSOP (SOT-23-6)	—
FET Type	P-Channel	—
Technology	MOSFET (Metal Oxide)	—

Substitute Part Grouping Explanation

Substitution eligibility for the SI3433CDV-T1-E3 is determined by strict alignment across the following critical parameters:

Mandatory Matching Criteria:

Drain to Source Voltage (Vdss): 20V
FET Type: P-Channel
Technology: MOSFET (Metal Oxide)
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C
RoHS3 Compliance: Required
Moisture Sensitivity Level: MSL 1 (Unlimited)

Functional Equivalence Parameters:

Continuous Drain Current (Id) @ 25°C: 6A or greater
Rds On (Max): 38mOhm or lower (at comparable Vgs and Id conditions)
Gate Charge (Qg): 45nC or lower
Input Capacitance (Ciss): 1300pF or lower
Power Dissipation: 3.3W or greater

Package Compatibility:

Primary: 6-TSOP (SOT-23-6 Thin, TSOT-23-6)
Secondary: Functionally compatible packages with identical pinout and thermal characteristics

Substitute parts meeting all mandatory criteria and maintaining or exceeding functional performance in the specified parameters are classified as direct equivalents. Parts with reduced current ratings or increased on-resistance are classified as functional substitutes suitable for lower-stress applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On Max (mOhm)	Qg Max (nC)	Ciss Max (pF)	Power Diss (W)	Package	Product Status
SI3433CDV-T1-E3	Vishay Siliconix	20	6	38	45	1300	3.3	6-TSOP	Active
AO6409A	Alpha & Omega Semiconductor	20	5.5	41	11	905	2.1	6-TSOP	Not For New Designs
BSL207SPH6327XTSA1	Infineon Technologies	20	6	41	20	1007	2	6-TSOP	Active
DMP2066LDM-7	Diodes Incorporated	20	4.6	40	10.1	820	1.25	SOT-26	Active
FDC602P	onsemi	20	5.5	35	20	1456	1.6	SuperSOT-6	Active
FDC604P	onsemi	20	5.5	33	30	1926	1.6	SuperSOT-6	Active
FDC638APZ	onsemi	20	4.5	43	12	1000	1.6	SuperSOT-6	Active
FDC638P	onsemi	20	4.5	48	14	1160	1.6	SuperSOT-6	Active
IRLTS2242TRPBF	Infineon Technologies	20	6.9	32	12	905	2	6-TSOP	Active
NTGS3136PT1G	onsemi	20	3.7	33	29	1901	0.7	6-TSOP	Obsolete
PMN42XPEAX	Nexperia USA Inc.	20	5.7	46	17.3	1410	0.5 / 8.33	6-TSOP	Active

Engineering Selection Recommendations

Tier 1: Direct Equivalents (Active Status, Full Performance Match)

BSL207SPH6327XTSA1 (Infineon Technologies) and IRLTS2242TRPBF (Infineon Technologies) are the primary direct equivalents. Both devices maintain 20V Vdss, 6A or greater continuous drain current, and 6-TSOP package compatibility. BSL207SPH6327XTSA1 delivers 41mOhm on-resistance with 20nC gate charge, while IRLTS2242TRPBF provides superior performance at 32mOhm on-resistance with 12nC gate charge. Both carry Active product status and full RoHS3 compliance.

Tier 2: Functional Substitutes (Active Status, Reduced Current Rating)

FDC602P and FDC604P (onsemi PowerTrench® series) operate at 5.5A continuous drain current with on-resistance values of 35mOhm and 33mOhm respectively. These devices are suitable for applications where the full 6A rating is not required. FDC602P and FDC604P maintain Active product status and SuperSOT-6 package compatibility with identical thermal and electrical footprints.

Tier 3: Lower-Current Alternatives (Active Status, Reduced Performance)

DMP2066LDM-7 (Diodes Incorporated) and FDC638APZ/FDC638P (onsemi) are rated for 4.6A and 4.5A continuous drain current respectively. These parts are suitable only for applications with reduced current demands. All three maintain Active product status and RoHS3 compliance.

Not Recommended for New Designs:

AO6409A (Alpha & Omega Semiconductor) carries "Not For New Designs" status and is not suitable for new circuit implementations.

Obsolete Status:

NTGS3136PT1G (onsemi) is classified as Obsolete and should not be selected for any new or ongoing applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute SI3433CDV-T1-E3 with AO6409A?

A: AO6409A is not recommended. Although it matches the 20V Vdss and 6-TSOP package, AO6409A carries "Not For New Designs" product status. For new circuit implementations, select from Active-status alternatives such as BSL207SPH6327XTSA1 or IRLTS2242TRPBF.

Q: What is the difference between BSL207SPH6327XTSA1 and IRLTS2242TRPBF?

A: Both are direct equivalents with 20V Vdss, 6A+ continuous drain current, and 6-TSOP packages. IRLTS2242TRPBF provides superior on-resistance performance (32mOhm vs. 41mOhm) and lower gate charge (12nC vs. 20nC), resulting in faster switching and reduced drive losses. BSL207SPH6327XTSA1 is the OptiMOS™ series device from Infineon. Selection depends on application-specific switching frequency and drive circuit requirements.

Q: Can I use FDC602P as a direct replacement?

A: FDC602P is a functional substitute, not a direct equivalent. It operates at 5.5A continuous drain current versus the SI3433CDV-T1-E3's 6A rating. FDC602P is suitable for applications where the full 6A rating is not required. The on-resistance is superior (35mOhm), but the package is SuperSOT-6 rather than 6-TSOP, requiring PCB layout verification.

Q: Why is NTGS3136PT1G listed if it is Obsolete?

A: NTGS3136PT1G is included for reference only to document historical equivalence relationships. This part must not be selected for any new designs or ongoing production. Use Active-status alternatives instead.

Q: What does "Not For New Designs" mean for AO6409A?

A: "Not For New Designs" indicates that the manufacturer has discontinued active support and recommends against using this part in new circuit designs. Existing designs may continue to use available inventory, but new implementations should select from Active-status alternatives.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance status and MSL 1 (Unlimited) moisture sensitivity rating, matching the SI3433CDV-T1-E3 environmental and regulatory requirements.

Q: What is the significance of package differences (6-TSOP vs. SuperSOT-6)?

A: Both 6-TSOP and SuperSOT-6 are surface mount packages with identical pinout and thermal characteristics. PCB layout and footprint files may differ between manufacturers. Verify footprint compatibility with your design tools before substitution. Thermal performance remains equivalent across these package types.

Q: Can I use PMN42XPEAX in automotive applications?

A: PMN42XPEAX carries AEC-Q101 automotive qualification and is suitable for automotive-grade applications. However, it is rated for 5.7A continuous drain current and 46mOhm on-resistance, making it a functional substitute rather than a direct equivalent. Verify that your application requirements align with the reduced performance specifications.

Q: What is the difference between FDC638APZ and FDC638P?

A: Both FDC638APZ and FDC638P are onsemi PowerTrench® devices rated for 4.5A continuous drain current and 1.6W power dissipation. FDC638APZ exhibits 43mOhm on-resistance, while FDC638P exhibits 48mOhm on-resistance. Both are suitable only for applications with reduced current demands below 6A.

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