STP20NF20 Equivalent & Substitute Parts

Part Overview

The STP20NF20 is an N-Channel MOSFET manufactured by STMicroelectronics, rated for 200V drain-to-source voltage and 18A continuous drain current in a TO-220 through-hole package. This device belongs to the STripFET™ series and is classified as Active product status. The STP20NF20 is suitable for applications requiring moderate voltage and current switching capabilities with thermal management through the TO-220 form factor.

Equivalent and substitute parts are identified based on matching or exceeding the electrical and mechanical specifications of the main device, ensuring functional compatibility in target applications while considering inventory availability and product lifecycle status.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	200	V
Continuous Drain Current (Id) @ 25°C	18	A
On-State Resistance (Rds On) @ 10A, 10V	125	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4	V
Gate Charge (Qg) @ 10V	39	nC
Power Dissipation (Max)	110	W
Operating Temperature Range	-55 to 175	°C
Package Type	TO-220-3	—
Mounting Type	Through Hole	—

Substitute Part Grouping Explanation

Substitute parts for the STP20NF20 are classified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Equal to or greater than 200V
Continuous Drain Current (Id): Equal to or greater than 18A
Package Type: TO-220-3 through-hole configuration
Operating Temperature Range: Minimum -55°C to 175°C
Gate Drive Voltage: 10V nominal
RoHS3 Compliance and REACH Unaffected status

Substitution Categories:

Category A - Direct Equivalents (Matching Vdss and Id): Parts with 200V Vdss and 18A or higher Id rating, suitable for direct replacement with equivalent thermal and electrical performance.

Category B - Voltage-Reduced Alternatives (Lower Vdss): Parts with reduced Vdss (100V) but matching or exceeding Id rating. These are suitable only for applications where the lower voltage rating is acceptable.

Category C - Current-Enhanced Alternatives (Higher Id): Parts with 200V Vdss and Id ratings exceeding 18A, providing additional current margin for the same voltage class.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On @ 10V (mOhm)	Qg @ 10V (nC)	Power Dissipation (W)	Product Status	Package
STP20NF20	STMicroelectronics	200	18	125	39	110	Active	TO-220-3
IRF640NPBF	Infineon Technologies	200	18	150	67	150	Not For New Designs	TO-220-3
IRFB4020PBF	Infineon Technologies	200	18	100	29	100	Active	TO-220-3
IRFB4620PBF	Infineon Technologies	200	25	72.5	38	144	Active	TO-220-3
PHP20NQ20T,127	NXP Semiconductors	200	20	130	65	150	Active	TO-220-3
IRF530NPBF	Infineon Technologies	100	17	90	37	70	Active	TO-220-3

Engineering Selection Recommendations

For Direct Replacement (Active Product Status):

IRFB4020PBF is the preferred direct substitute. It maintains 200V Vdss and 18A Id ratings with Active product status, ensuring long-term availability and design support. The lower on-state resistance (100 mOhm vs. 125 mOhm) and reduced gate charge (29 nC vs. 39 nC) provide improved switching efficiency and reduced drive circuit stress.

IRFB4620PBF offers enhanced current capability (25A vs. 18A) at the same 200V rating with Active status. This part is suitable when additional current margin is required without changing the voltage class or package footprint.

PHP20NQ20T,127 from NXP Semiconductors provides 200V/20A rating with Active status. This part is compatible with the STP20NF20 footprint and electrical requirements, with higher power dissipation capability (150W).

For Voltage-Reduced Applications:

IRF530NPBF is suitable only for applications where 100V Vdss is sufficient. This part has Active status and lower on-state resistance (90 mOhm), but the reduced voltage rating restricts its use to lower-voltage circuit designs.

Not Recommended for New Designs:

IRF640NPBF carries "Not For New Designs" status despite matching 200V/18A specifications. This classification indicates the manufacturer has discontinued active support for new design implementations. Existing designs using this part may continue operation, but new projects should select from Active-status alternatives.

Compliance Considerations:

All recommended substitutes maintain RoHS3 compliance and REACH Unaffected status, matching the environmental and regulatory requirements of the STP20NF20.

Frequently Asked Questions (FAQ)

Q: Can I use IRF530NPBF as a direct replacement for STP20NF20?

A: IRF530NPBF is not a direct replacement. While it shares the TO-220-3 package and similar gate characteristics, its 100V Vdss rating is significantly lower than the STP20NF20's 200V rating. Use IRF530NPBF only in applications where the circuit voltage does not exceed 100V.

Q: What is the difference between IRFB4020PBF and IRFB4620PBF?

A: Both parts maintain 200V Vdss and TO-220-3 packaging. IRFB4020PBF is rated for 18A continuous drain current, matching the STP20NF20 specification. IRFB4620PBF is rated for 25A, providing 39% additional current capacity. IRFB4620PBF has lower on-state resistance (72.5 mOhm vs. 100 mOhm), resulting in reduced power dissipation at equivalent current levels.

Q: Why is IRF640NPBF listed if it has "Not For New Designs" status?

A: IRF640NPBF is included for reference in existing designs that currently use this part. The "Not For New Designs" designation indicates Infineon has transitioned this product to end-of-life status. New designs should select IRFB4020PBF or IRFB4620PBF as active alternatives.

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

A: Yes. All listed substitute parts use TO-220-3 through-hole packaging, ensuring mechanical compatibility with STP20NF20 PCB layouts and thermal management solutions.

Q: How do I determine which substitute is best for my application?

A: Evaluate based on three criteria: (1) Required voltage rating—all substitutes except IRF530NPBF support 200V; (2) Required current rating—IRFB4620PBF and PHP20NQ20T,127 exceed 18A; (3) Product lifecycle status—prioritize Active-status parts (IRFB4020PBF, IRFB4620PBF, PHP20NQ20T,127) for new designs.

Q: What is the significance of on-state resistance (Rds On) differences?

A: Lower Rds On reduces power dissipation during conduction. IRFB4620PBF (72.5 mOhm) dissipates less heat than STP20NF20 (125 mOhm) at equivalent current levels. This improves thermal performance and may reduce heatsink requirements.

Q: Can I use PHP20NQ20T,127 in a design currently using STP20NF20?

A: Yes. PHP20NQ20T,127 matches the 200V/20A electrical specification, TO-220-3 package, and operating temperature range. The higher gate charge (65 nC vs. 39 nC) requires verification that the gate drive circuit can supply the additional charge within acceptable switching times.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message