BSS209PW P-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The BSS209PW is a P-Channel MOSFET manufactured by Infineon Technologies, designed for surface mount applications in the SOT-323 package. This device operates at 20V drain-to-source voltage with a continuous drain current rating of 580mA at 25°C ambient temperature. The BSS209PW belongs to the OptiMOS™ series and is classified as obsolete product status. Due to its obsolete classification, identifying functionally equivalent substitute components is essential for design continuity, procurement flexibility, and long-term supply chain management.

Substiute Parts

BSS209PW

Infineon TechnologiesIn Stock: 59415BSS209PW Datasheet

Current PartRFQ

PMF170XP,115

Nexperia USA Inc.In Stock: 11861PMF170XP,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BSS209PW is determined by strict electrical and mechanical parameter alignment within the P-Channel MOSFET category. The following criteria establish substitution validity:

Primary Substitution Criteria:

• FET Type: P-Channel (required match)
• Drain-to-Source Voltage (Vdss): 20V minimum (equal or higher acceptable)
• Package Type: SOT-323 (SC-70) surface mount (physical compatibility required)
• Operating Temperature Range: -55°C to 150°C (minimum requirement)
• Gate Voltage (Vgs Max): ±12V (standard gate drive compatibility)

Secondary Electrical Parameters:

• Continuous Drain Current (Id): Substitute must equal or exceed 580mA at 25°C
• On-Resistance (Rds On): Lower values indicate improved performance; higher values require application verification
• Gate Threshold Voltage (Vgs(th)): Must fall within standard P-Channel operating range
• Power Dissipation: Substitute rating must support application thermal requirements

The PMF170XP,115 meets all primary and secondary substitution criteria and is classified as an active product with current manufacturing status.

Parameter Comparison

Engineering Selection Recommendations

Substitution Validity: The PMF170XP,115 is a valid electrical and mechanical substitute for the BSS209PW. Both devices share identical drain-source voltage ratings, gate voltage specifications, operating temperature ranges, and SOT-323 package geometry. Pin-to-pin compatibility is confirmed.

Product Status Advantage: The PMF170XP,115 carries active product status from Nexperia USA Inc., ensuring ongoing manufacturing support, documented availability, and supply chain continuity. The BSS209PW is classified as obsolete, making the PMF170XP,115 the preferred selection for new designs and long-term production requirements.

Compliance and Certification: The PMF170XP,115 is ROHS3 compliant and carries REACH unaffected status, meeting current regulatory requirements. Both devices are classified under ECCN EAR99 and share identical HTSUS codes (8541.29.0095 for substitute; 8541.21.0095 for original), confirming tariff classification alignment.

Electrical Performance Considerations: The PMF170XP,115 provides superior electrical characteristics: continuous drain current of 1A exceeds the BSS209PW requirement of 580mA, and on-resistance of 200mOhm at 1A, 4.5V is significantly lower than the 550mOhm specification of the original part. These improvements result in reduced power dissipation and improved thermal performance in equivalent applications.

Gate Drive Implications: The PMF170XP,115 exhibits higher gate charge (3.9nC versus 1.38nC) and input capacitance (280pF versus 89.9pF). Applications utilizing fast gate switching or current-limited gate drive circuits must verify compatibility with these increased capacitive loads.

Packaging and Handling: Both devices use SOT-323 surface mount packaging with MSL 1 (unlimited moisture sensitivity level), requiring no special moisture control during storage or assembly. Tape & Reel packaging of the PMF170XP,115 is suitable for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the PMF170XP,115 be used as a direct replacement for the BSS209PW in existing PCB designs?

A: Yes. The PMF170XP,115 is pin-compatible with the BSS209PW in SOT-323 packaging. No PCB layout modifications are required. However, gate drive circuit verification is recommended due to higher gate charge and input capacitance of the substitute part.

Q: What are the key electrical differences between these two parts?

A: The PMF170XP,115 provides higher continuous drain current (1A versus 580mA), lower on-resistance (200mOhm versus 550mOhm), and higher power dissipation capability at case temperature (1.67W versus 520mW ambient). Gate charge and input capacitance are also higher in the substitute. Drain-source voltage, gate voltage limits, and operating temperature ranges are identical.

Q: Why is the PMF170XP,115 preferred over the BSS209PW?

A: The PMF170XP,115 is classified as active product with current manufacturing support, while the BSS209PW is obsolete. For new designs and production continuity, the active substitute ensures long-term availability and supply chain reliability. Electrical performance improvements also provide design margin benefits.

Q: Are there any thermal management differences between these parts?

A: The PMF170XP,115 specifies power dissipation at both ambient temperature (290mW Ta) and case temperature (1.67W Tc), providing higher thermal capability. The BSS209PW specifies 520mW at ambient temperature only. Applications with elevated thermal environments may benefit from the substitute's improved thermal rating.

Q: Do these parts require different gate drive circuits?

A: Both parts operate with ±12V maximum gate voltage and are compatible with standard P-Channel MOSFET gate drive circuits. However, the PMF170XP,115 has higher gate charge (3.9nC) and input capacitance (280pF) compared to the BSS209PW (1.38nC and 89.9pF respectively). Gate drive circuits with current-limiting resistors or slow switching requirements should be verified for compatibility with the higher capacitive load.

Q: What is the inventory status of these parts?

A: The BSS209PW has 59,400 pieces in stock as new original inventory. The PMF170XP,115 has 11,760 pieces in stock as new original inventory in Tape & Reel packaging. Inventory levels should be confirmed with suppliers for current availability.

Q: Are there any compliance or regulatory differences?

A: The PMF170XP,115 is ROHS3 compliant; RoHS status for the BSS209PW is not specified. Both parts are REACH unaffected and classified under ECCN EAR99. The substitute meets current regulatory requirements for new product designs.

Q: Can the PMF170XP,115 handle higher current applications than the BSS209PW?

A: Yes. The PMF170XP,115 is rated for 1A continuous drain current at 25°C, compared to 580mA for the BSS209PW. Applications requiring higher current switching capability can utilize the substitute's increased current rating. Lower on-resistance also reduces power dissipation in high-current scenarios.