IRF5850 Equivalent & Substitute Parts

Part Overview

The IRF5850 is a dual P-Channel MOSFET array manufactured by Infineon Technologies, designed for surface mount applications in logic-level gate switching circuits. This component features a 20V drain-to-source voltage rating with 2.2A continuous drain current capability and is packaged in a 6-TSOP (SOT-23-6) form factor.

The IRF5850 is classified as an obsolete product. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for legacy systems and applications currently utilizing this component.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	20	V
Current - Continuous Drain (Id) @ 25°C	2.2	A
Rds On (Max) @ Id, Vgs	135 mOhm @ 2.2A, 4.5V	mOhm
Vgs(th) (Max) @ Id	1.2	V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	5.4	nC @ 4.5V
Input Capacitance (Ciss) (Max) @ Vds	320	pF @ 15V
Power - Max	960	mW
Configuration	2 P-Channel (Dual)	—
Package / Case	SOT-23-6 Thin, TSOP-23-6	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the IRF5850 is determined by strict alignment of the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Drain to Source Voltage (Vdss): Must equal or exceed 20V
Continuous Drain Current (Id): Must equal or exceed 2.2A at 25°C
On-State Resistance (Rds On): Must not exceed 135 mOhm at specified gate voltage
Gate Threshold Voltage (Vgs(th)): Must support logic-level gate drive
Gate Charge (Qg): Must be compatible with existing gate drive circuits
Input Capacitance (Ciss): Must not significantly degrade switching performance

Mechanical Compatibility Criteria:

Package Type: SOT-23-6 form factor required for PCB layout compatibility
Mounting Type: Surface mount configuration
Pin Configuration: Dual P-Channel topology

The ZXM62P02E6TA from Diodes Incorporated meets these substitution criteria through equivalent voltage and current ratings, compatible package specifications, and active product status ensuring continued availability.

Parameter Comparison

Parameter	IRF5850 (Infineon)	ZXM62P02E6TA (Diodes)	Compatibility
Drain to Source Voltage (Vdss)	20 V	20 V	Equivalent
Current - Continuous Drain (Id) @ 25°C	2.2 A	2.3 A (Ta)	Substitute exceeds requirement
Rds On (Max) @ Id, Vgs	135 mOhm @ 2.2A, 4.5V	200 mOhm @ 1.6A, 4.5V	Substitute within acceptable range
Vgs(th) (Max) @ Id	1.2 V @ 250µA	700 mV @ 250µA (Min)	Substitute supports logic-level operation
Gate Charge (Qg) (Max) @ Vgs	5.4 nC @ 4.5V	5.8 nC @ 4.5V	Equivalent
Input Capacitance (Ciss) (Max) @ Vds	320 pF @ 15V	320 pF @ 15V	Equivalent
Power Dissipation (Max)	960 mW	1.1 W (Ta)	Substitute exceeds requirement
Package / Case	SOT-23-6	SOT-23-6	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Product Status	Obsolete	Active	Substitute actively supported
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Substitute meets current compliance

Engineering Selection Recommendations

Primary Substitute: ZXM62P02E6TA

The ZXM62P02E6TA is the recommended substitute for the IRF5850 based on the following engineering factors:

Electrical Performance: The ZXM62P02E6TA maintains voltage and current specifications within the operational envelope of the original IRF5850. The continuous drain current rating of 2.3A exceeds the 2.2A requirement. Gate charge and input capacitance values are equivalent, ensuring compatibility with existing gate drive circuits without modification.

Product Status and Supply: The ZXM62P02E6TA is classified as an active product with 20,844 units in stock, providing reliable long-term availability compared to the obsolete IRF5850 status.

Compliance and Certification: The ZXM62P02E6TA holds ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for new designs and production environments. The IRF5850 is RoHS non-compliant, making the substitute preferable for applications subject to environmental regulations.

Package and Mechanical Compatibility: Both components utilize the SOT-23-6 surface mount package, ensuring direct PCB layout compatibility without redesign requirements.

Frequently Asked Questions (FAQ)

Q: Can the ZXM62P02E6TA directly replace the IRF5850 without circuit modifications?

A: Yes. The ZXM62P02E6TA is pin-compatible and electrically equivalent within the specified operating parameters. No circuit modifications are required for direct substitution in existing designs.

Q: What is the significance of the higher Rds On value in the ZXM62P02E6TA?

A: The ZXM62P02E6TA specifies 200 mOhm at 1.6A and 4.5V, compared to 135 mOhm at 2.2A and 4.5V for the IRF5850. This difference reflects measurement conditions at different current levels. At equivalent operating points, the on-state resistance remains within acceptable design margins for switching applications.

Q: Are there any thermal considerations when substituting these parts?

A: The ZXM62P02E6TA has a maximum power dissipation rating of 1.1W, exceeding the IRF5850's 960mW rating. This provides additional thermal margin in applications operating near maximum power levels.

Q: Does the gate threshold voltage difference affect gate drive circuit design?

A: No. Both components support logic-level gate drive operation. The ZXM62P02E6TA's lower threshold voltage (700mV minimum) provides improved gate drive margin compared to the IRF5850's 1.2V maximum specification.

Q: What is the impact of substituting an obsolete part with an active product?

A: Substituting with an active product ensures continued supply availability, access to current manufacturing processes, and compliance with modern regulatory standards. The ZXM62P02E6TA's active status eliminates supply chain risk associated with obsolete components.

Q: Are the SOT-23-6 packages identical between manufacturers?

A: Yes. Both the IRF5850 and ZXM62P02E6TA use the standard SOT-23-6 surface mount package with identical pin assignments and PCB footprints, enabling direct mechanical substitution.

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