BSS84_D87Z P-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The BSS84_D87Z is a P-Channel metal oxide semiconductor field-effect transistor (MOSFET) manufactured by onsemi, rated for 50V drain-to-source voltage with 130mA continuous drain current. The device is packaged in a surface mount SOT-23-3 (TO-236-3) configuration and is classified as obsolete product status.

Due to the obsolete status of the BSS84_D87Z, equivalent and substitute parts from active product lines are necessary to ensure design continuity and long-term component availability. Substitute devices maintain the same electrical performance envelope and mechanical compatibility while offering active manufacturing status and improved availability.

Key Parameters

Parameter	Value	Unit
FET Type	P-Channel	—
Drain-to-Source Voltage (Vdss)	50	V
Continuous Drain Current (Id) @ 25°C	130	mA
On-Resistance (Rds On) @ 100mA, 5V	10	Ω
Gate-Source Threshold Voltage (Vgs(th)) @ 1mA	2	V
Maximum Gate-Source Voltage (Vgs)	±20	V
Power Dissipation (Max)	360	mW
Operating Temperature Range	-55 to 150	°C
Package Type	SOT-23-3 (TO-236-3)	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BSS84_D87Z are selected based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Electrical Parameters (Must Match):

FET Type: P-Channel
Drain-to-Source Voltage (Vdss): 50V
Continuous Drain Current (Id): 130mA @ 25°C
On-Resistance (Rds On): 10Ω @ 100mA, 5V
Gate-Source Threshold Voltage (Vgs(th)): 2V @ 1mA or 250µA
Maximum Gate-Source Voltage (Vgs): ±20V
Package Type: SOT-23-3 (TO-236-3) or equivalent surface mount package

Mechanical Parameters (Must Match):

Mounting Type: Surface Mount
Package/Case: TO-236-3, SC-59, or SOT-23-3
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories:

Direct Parametric Equivalents: Parts with identical electrical specifications and power dissipation ratings (360mW), maintaining full compatibility with the original design.
Functional Equivalents: Parts with identical core electrical parameters but reduced power dissipation ratings (225mW to 300mW), suitable for applications where thermal performance is not a limiting factor.

All substitute parts maintain the same gate charge characteristics, input capacitance, and operating temperature range compatibility with the original BSS84_D87Z.

Parameter Comparison

Parameter	BSS84_D87Z (onsemi)	BSS84 (Good-Ark)	BSS84LT1G (onsemi)	BSS84-H (onsemi)	BSS84,215 (Nexperia)	BSS84-7-F (Diodes)
FET Type	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel
Vdss (V)	50	50	50	50	50	50
Id @ 25°C (mA)	130	130	130	130	130	130
Rds On @ 100mA, 5V (Ω)	10	10	10	10	10	10
Vgs(th) @ 1mA or 250µA (V)	2	2	2	2	2	2
Vgs (Max) (±V)	20	20	20	20	20	20
Power Dissipation (mW)	360	225	225	360	250	300
Operating Temperature (°C)	-55 to 150	to 150	-55 to 150	-55 to 150	-65 to 150	-55 to 150
Package	SOT-23-3	SOT-23	SOT-23-3	SOT-23-3	TO-236AB	SOT-23-3
Product Status	Obsolete	Active	Active	Active	Not For New Designs	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: BSS84LT1G (onsemi)

The BSS84LT1G is the preferred substitute for the obsolete BSS84_D87Z. This part is manufactured by the same original equipment manufacturer (onsemi) and maintains identical electrical specifications including Vdss, Id, Rds On, and Vgs(th) parameters. The BSS84LT1G carries active product status with ROHS3 compliance certification, ensuring long-term availability and regulatory compliance. The operating temperature range (-55°C to 150°C) matches the original specification. Power dissipation is reduced to 225mW, which is acceptable for most applications where the original 360mW rating was not a critical design constraint.

Secondary Recommendation: BSS84-H (onsemi)

The BSS84-H provides a direct parametric equivalent with identical power dissipation (360mW) and all electrical specifications matching the BSS84_D87Z. This part is also manufactured by onsemi with active product status and ROHS3 compliance. The BSS84-H is suitable for applications requiring the full 360mW power dissipation capability of the original device.

Alternative Recommendation: BSS84-7-F (Diodes Incorporated)

The BSS84-7-F from Diodes Incorporated is an active product with all core electrical parameters matching the BSS84_D87Z. Power dissipation is rated at 300mW, providing a middle ground between the 225mW and 360mW options. This part carries ROHS3 compliance and active product status.

Not Recommended for New Designs: BSS84,215 (Nexperia)

The BSS84,215 is classified as "Not For New Designs" and should not be selected for new circuit implementations, despite meeting electrical parameter requirements.

Frequently Asked Questions (FAQ)

Q: Can the BSS84LT1G directly replace the BSS84_D87Z in existing designs?

A: Yes. The BSS84LT1G maintains identical electrical specifications for Vdss, Id, Rds On, Vgs(th), and Vgs(max). The package type (SOT-23-3) and pin configuration are identical. The reduced power dissipation (225mW vs. 360mW) is acceptable unless thermal analysis indicates the original 360mW rating was critical to the design.

Q: What is the difference between the BSS84LT1G and BSS84-H?

A: Both parts are manufactured by onsemi and are electrically equivalent to the BSS84_D87Z. The primary difference is power dissipation: BSS84-H maintains the original 360mW rating, while BSS84LT1G is rated at 225mW. For most applications, the BSS84LT1G is sufficient. Select BSS84-H only if thermal calculations require the full 360mW dissipation capability.

Q: Are all substitute parts in the same package?

A: All substitute parts use SOT-23-3 (TO-236-3) or equivalent surface mount packages. The BSS84,215 uses TO-236AB packaging, which is mechanically compatible with SOT-23-3 footprints. No PCB layout modifications are required for any of the recommended substitutes.

Q: What is the impact of reduced power dissipation on circuit performance?

A: Power dissipation ratings indicate the maximum thermal energy the device can safely dissipate. Lower ratings (225mW vs. 360mW) do not affect electrical performance or switching characteristics. They indicate the device operates at lower junction temperatures under the same load conditions. If your circuit analysis shows power dissipation below 225mW, the BSS84LT1G is fully compatible.

Q: Are all substitute parts RoHS compliant?

A: Yes. All active product substitutes (BSS84LT1G, BSS84-H, BSS84-7-F, and BSS84) carry ROHS3 compliance certification. The BSS84,215 is also ROHS3 compliant but is not recommended for new designs.

Q: Can I use the Good-Ark BSS84 as a substitute?

A: Yes. The Good-Ark BSS84 meets all electrical parameter requirements and is an active product. However, the operating temperature range is specified only to 150°C (upper limit) without a lower limit specification, whereas the original BSS84_D87Z specifies -55°C to 150°C. Verify the lower temperature limit requirement for your application before selection.

Q: What is the moisture sensitivity level for all substitute parts?

A: All substitute parts maintain MSL 1 (Unlimited) classification, identical to the original BSS84_D87Z. No special moisture handling procedures are required during storage or assembly.

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