STP9NK90Z Equivalent & Substitute Parts

Part Overview

The STP9NK90Z is an N-Channel 900V 8A MOSFET manufactured by STMicroelectronics in the SuperMESH™ series. This device is designed for high-voltage switching applications requiring through-hole mounting in TO-220 packaging. The part is currently Active in product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified to provide design flexibility for applications where alternative packaging formats, thermal performance requirements, or supply chain considerations necessitate component alternatives.

Substiute Parts

STP9NK90Z

STMicroelectronicsIn Stock: 8135STP9NK90Z Datasheet

Current PartRFQ

STW9NK90Z

STMicroelectronicsIn Stock: 19312STW9NK90Z Datasheet

Parametric EquivalentRFQ

FQP9N90C

onsemiIn Stock: 1692FQP9N90C Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STP9NK90Z is determined by electrical and mechanical parameter alignment within the N-Channel MOSFET category. The critical parameters that define substitution compatibility are:

Electrical Parameters:

• Drain to Source Voltage (Vdss): 900V minimum
• Continuous Drain Current (Id): 8A minimum at 25°C
• Gate-Source Voltage (Vgs): ±30V maximum rating
• Operating Temperature Range: -55°C to 150°C minimum
• Drive Voltage: 10V maximum for Rds On specification

Mechanical Parameters:

• Mounting Type: Through Hole
• Technology: MOSFET (Metal Oxide)
• FET Type: N-Channel

Substitute parts are classified into two categories: Parametric Equivalents (identical electrical specifications with alternative packaging) and Similar Parts (matching core electrical ratings with minor parameter variations within acceptable engineering tolerances).

Parameter Comparison

Engineering Selection Recommendations

STW9NK90Z (TO-247-3 Package)

The STW9NK90Z is a parametric equivalent to the STP9NK90Z with identical electrical specifications. Both devices are manufactured by STMicroelectronics and belong to the SuperMESH™ series. The primary distinction is packaging format: STW9NK90Z uses TO-247-3 instead of TO-220-3. Selection of this substitute is appropriate when thermal management requirements or PCB layout constraints favor the TO-247-3 package geometry. Both parts maintain Active product status, ROHS3 compliance, and unlimited moisture sensitivity rating. Inventory availability for STW9NK90Z is higher (19,260 pcs) compared to STP9NK90Z (8,064 pcs).

FQP9N90C (TO-220-3 Package)

The FQP9N90C is a similar substitute manufactured by onsemi in the QFET® series. This device maintains the same 900V/8A electrical rating and TO-220-3 packaging as the STP9NK90Z. Parameter variations include: Rds On of 1.4Ω (versus 1.3Ω), gate charge of 58nC (versus 72nC), input capacitance of 2730pF (versus 2115pF), and power dissipation of 205W (versus 160W). These variations remain within acceptable engineering tolerances for high-voltage switching applications. The FQP9N90C is Active in product status with ROHS3 compliance. This substitute is suitable for applications where onsemi device qualification is required or where the higher power dissipation rating provides additional thermal margin.

All three devices maintain identical operating temperature ranges (-55°C to 150°C), gate-source voltage ratings (±30V), and regulatory compliance status (ROHS3, REACH Unaffected).

Frequently Asked Questions (FAQ)

Q: Can the STW9NK90Z (TO-247-3) be used as a direct replacement for the STP9NK90Z (TO-220-3)?

A: The STW9NK90Z is electrically equivalent to the STP9NK90Z with identical Vdss, Id, Rds On, gate charge, and operating temperature specifications. However, the TO-247-3 package has different pin spacing and mounting hole geometry compared to TO-220-3. PCB layout modifications are required for mechanical compatibility. Electrical performance is equivalent.

Q: What are the key differences between the STP9NK90Z and FQP9N90C?

A: Both devices share 900V Vdss, 8A continuous drain current, and TO-220-3 packaging. The FQP9N90C has slightly higher Rds On (1.4Ω versus 1.3Ω), lower gate charge (58nC versus 72nC), higher input capacitance (2730pF versus 2115pF), and higher power dissipation rating (205W versus 160W). These differences are within acceptable tolerances for switching applications and do not prevent substitution.

Q: Are all three devices RoHS3 compliant?

A: Yes. The STP9NK90Z, STW9NK90Z, and FQP9N90C are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which substitute should be selected for improved thermal performance?

A: The FQP9N90C offers a higher power dissipation rating of 205W compared to 160W for both STMicroelectronics devices. Selection of FQP9N90C is appropriate for applications requiring additional thermal margin. The STW9NK90Z (TO-247-3) also provides improved thermal characteristics due to its larger package footprint compared to TO-220-3.

Q: Can the STP9NK90Z be used in applications requiring the TO-247-3 package format?

A: No. The STP9NK90Z is manufactured exclusively in TO-220-3 packaging. For TO-247-3 format, the STW9NK90Z must be selected. Both devices are electrically equivalent and manufactured by STMicroelectronics.

Q: What is the moisture sensitivity level for all three devices?

A: The STP9NK90Z and STW9NK90Z have MSL rating of 1 (Unlimited). The FQP9N90C has MSL listed as Not Applicable. All three devices are suitable for standard storage and handling conditions without special moisture control requirements.

Q: Are there inventory considerations when selecting between these substitutes?

A: Yes. STW9NK90Z has the highest inventory availability at 19,260 pcs, followed by FQP9N90C at 1,637 pcs, and STP9NK90Z at 8,064 pcs. Supply chain requirements may influence substitute selection based on delivery timelines and quantity needs.