BSS84TC P-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The BSS84TC is a P-Channel Metal Oxide Semiconductor Field Effect Transistor (MOSFET) manufactured by Diodes Incorporated, rated for 50V drain-to-source voltage with 130mA continuous drain current. The device is packaged in SOT-23-3 surface mount configuration and is designed for general-purpose switching and amplification applications in low-power circuits.

The BSS84TC carries an Obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Key Parameters

Parameter	Value	Unit
FET Type	P-Channel	—
Drain to Source Voltage (Vdss)	50	V
Continuous Drain Current (Id) @ 25°C	130	mA
Rds On (Max) @ 100mA, 5V	10	Ohm
Vgs(th) (Max) @ 1mA	2	V
Vgs (Max)	±20	V
Power Dissipation (Max)	360	mW
Operating Temperature Range	-55 to 150	°C
Package Type	SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BSS84TC is determined by electrical and mechanical parameter equivalence within the P-Channel MOSFET category. The following parameters establish substitution validity:

Primary Equivalence Criteria:

FET Type: P-Channel
Drain to Source Voltage (Vdss): 50V minimum
Continuous Drain Current (Id): 130mA minimum at 25°C
Rds On (Max): 10 Ohm or lower at specified gate-source voltage
Gate-Source Threshold Voltage (Vgs(th)): 2V maximum
Maximum Gate-Source Voltage (Vgs): ±20V minimum
Operating Temperature Range: -55°C to 150°C minimum
Package: SOT-23-3 or equivalent surface mount configuration
Compliance: ROHS3 Compliant, Moisture Sensitivity Level 1

Substitution Logic: Parts meeting or exceeding all primary equivalence criteria are classified as direct substitutes. Variations in power dissipation rating, input capacitance, and specific threshold voltage test conditions do not preclude substitution when electrical performance parameters remain within or exceed the BSS84TC specification envelope. Product status (Active vs. Obsolete) indicates supply availability and design recommendation status but does not affect electrical substitutability.

Parameter Comparison

Parameter	BSS84TC (Main)	BSS84-7-F	BSS84 (Good-Ark)	BSS84,215	BSS84LT1G
Manufacturer	Diodes Incorporated	Diodes Incorporated	Good-Ark Semiconductor	Nexperia USA Inc.	onsemi
Product Status	Obsolete	Active	Active	Not For New Designs	Active
FET Type	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel
Vdss	50V	50V	50V	50V	50V
Id @ 25°C	130mA	130mA	130mA	130mA	130mA
Rds On (Max) @ 100mA, 5V	10Ohm	10Ohm	10Ohm	10Ohm @ 130mA, 10V	10Ohm
Vgs(th) (Max)	2V @ 1mA	2V @ 1mA	2V @ 250µA	2V @ 1mA	2V @ 250µA
Vgs (Max)	±20V	±20V	±20V	±20V	±20V
Power Dissipation (Max)	360mW	300mW	225mW	250mW	225mW
Operating Temperature	-55 to 150°C	-55 to 150°C	150°C	-65 to 150°C	-55 to 150°C
Package	SOT-23-3	SOT-23-3	SOT-23	TO-236AB	SOT-23-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute (Recommended for New Designs): BSS84-7-F (Diodes Incorporated) is the manufacturer-recommended substitute. This part maintains Active product status, ensuring long-term supply availability and design support. Electrical parameters are equivalent to the BSS84TC across all critical specifications. The BSS84-7-F is available in Cut Tape and Digi-Reel packaging formats, supporting both prototype and production volume requirements.

Secondary Substitutes (Active Status): BSS84LT1G (onsemi) and BSS84 (Good-Ark Semiconductor) are Active products meeting all electrical equivalence criteria. Both parts maintain the required operating temperature range, voltage ratings, and current specifications. These options provide alternative sourcing channels and supply chain redundancy.

Conditional Substitute (Not For New Designs): BSS84,215 (Nexperia USA Inc.) meets all electrical substitution criteria but carries a "Not For New Designs" status. This part is suitable for legacy system maintenance and repair applications where supply of the original BSS84TC is unavailable. The extended operating temperature range (-65°C to 150°C) provides additional thermal margin compared to the BSS84TC specification.

Selection Basis: Substitution recommendations are based on product status classification, ROHS3 compliance certification, and Moisture Sensitivity Level 1 rating. All substitute parts maintain electrical equivalence within the specified parameter envelope. Power dissipation variations among substitutes do not affect functional compatibility in applications designed for the BSS84TC 360mW rating, as all substitutes operate within acceptable thermal limits for SOT-23-3 package dissipation.

Frequently Asked Questions (FAQ)

Q: Can BSS84-7-F directly replace BSS84TC in existing circuit designs? A: Yes. The BSS84-7-F meets all electrical equivalence criteria for the BSS84TC, including Vdss (50V), Id (130mA), Rds On (10 Ohm), and operating temperature range (-55°C to 150°C). Both parts use identical SOT-23-3 packaging with matching pinout. No circuit modifications are required.

Q: What is the difference between BSS84-7-F and BSS84LT1G? A: Both parts are electrically equivalent substitutes for the BSS84TC. The primary difference is manufacturer: BSS84-7-F is manufactured by Diodes Incorporated, while BSS84LT1G is manufactured by onsemi. Power dissipation ratings differ (300mW vs. 225mW), but both are acceptable for BSS84TC applications. Selection between these parts depends on supply availability and procurement preferences.

Q: Why does BSS84,215 carry a "Not For New Designs" status? A: Product status reflects manufacturer design recommendations and supply strategy. "Not For New Designs" indicates the manufacturer is transitioning away from this part number for new applications. However, BSS84,215 remains electrically equivalent and suitable for legacy system support and repair applications where BSS84TC supply is unavailable.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts (BSS84-7-F, BSS84, BSS84,215, and BSS84LT1G) carry ROHS3 Compliant certification and Moisture Sensitivity Level 1 rating, matching the BSS84TC compliance profile.

Q: Can I use BSS84 (Good-Ark Semiconductor) in high-temperature applications? A: The Good-Ark BSS84 specifies a maximum operating temperature of 150°C (TJ), which meets the BSS84TC requirement. However, the Good-Ark part does not specify a minimum operating temperature in the provided data. For applications requiring the full -55°C to 150°C range, BSS84-7-F, BSS84LT1G, or BSS84,215 are preferred.

Q: What is the significance of the SOT-23-3 package designation? A: SOT-23-3 is a three-terminal surface mount package (also designated TO-236-3 or SC-59) with standardized pinout and footprint. All substitute parts use this package type or equivalent configurations (TO-236AB), ensuring mechanical and electrical compatibility with existing PCB designs without layout modifications.

Q: How do input capacitance variations affect substitution? A: Input capacitance (Ciss) variations among substitute parts (30 pF to 45 pF) do not affect substitutability for switching applications. These variations may influence high-frequency performance characteristics but remain within acceptable tolerances for general-purpose P-Channel MOSFET applications. Circuit performance validation is not required for standard switching applications.

Q: Is the BSS84TC still available for purchase? A: The BSS84TC carries an Obsolete product status, indicating discontinued manufacturing. Substitute parts with Active status (BSS84-7-F, BSS84LT1G, BSS84 from Good-Ark) are recommended for new procurement. Existing BSS84TC inventory may be available through authorized distributors, but long-term supply cannot be assured.

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