FMMT560QTC Equivalent & Substitute Parts

Part Overview

The FMMT560QTC is a high-voltage PNP bipolar junction transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-23-3 package. This device operates at collector-emitter breakdown voltages up to 500 V with a maximum collector current of 150 mA and is qualified to AEC-Q101 automotive standards. The part is currently active in production with 813 pieces in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, design flexibility, or inventory availability.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) Max	150	mA
Voltage - Collector Emitter Breakdown (Max)	500	V
Vce Saturation (Max) @ Ib, Ic	500 mV @ 10 mA, 50 mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 1 mA, 10 V	—
Power - Max	500	mW
Frequency - Transition	60	MHz
Operating Temperature Range	−55 to 150	°C
Package / Case	SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the FMMT560QTC with the TSA884CX RFG is based on electrical and mechanical parameter equivalence within the allowed tolerances for this product category. Both devices are PNP bipolar junction transistors with identical maximum collector current (150 mA) and collector-emitter breakdown voltage (500 V). Both share identical saturation voltage specifications and collector cutoff current ratings. Both are packaged in the SOT-23-3 surface mount package and operate across overlapping temperature ranges. The critical parameters that determine substitution eligibility are:

Transistor polarity (PNP)
Maximum collector current (150 mA)
Collector-emitter breakdown voltage (500 V)
Saturation voltage characteristics (500 mV @ 10 mA, 50 mA)
Collector cutoff current (100 nA)
Package type (SOT-23-3)
Surface mount compatibility
RoHS3 compliance

Parameter Comparison

Parameter	FMMT560QTC (Diodes Inc.)	TSA884CX RFG (Taiwan Semiconductor)	Match Status
Transistor Type	PNP	PNP	Equivalent
Current - Collector (Ic) Max	150 mA	150 mA	Equivalent
Voltage - Collector Emitter Breakdown (Max)	500 V	500 V	Equivalent
Vce Saturation (Max) @ Ib, Ic	500 mV @ 10 mA, 50 mA	500 mV @ 10 mA, 50 mA	Equivalent
Current - Collector Cutoff (Max)	100 nA	100 nA	Equivalent
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 1 mA, 10 V	150 @ 1 mA, 10 V	Substitute Higher
Power - Max	500 mW	300 mW	Substitute Lower
Frequency - Transition	60 MHz	50 MHz	Substitute Lower
Operating Temperature Range	−55 to 150 °C	Up to 150 °C	Substitute Narrower
Package / Case	SOT-23-3	SOT-23-3	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent

Engineering Selection Recommendations

The TSA884CX RFG is a qualified substitute for the FMMT560QTC in applications where the following conditions are met:

Electrical Compatibility: Both devices meet the core electrical requirements for PNP high-voltage transistor applications. The TSA884CX RFG exhibits a higher DC current gain (150 vs. 100 minimum), which is advantageous for base-drive efficiency. The maximum power dissipation of the TSA884CX RFG is 300 mW compared to 500 mW for the FMMT560QTC; circuit designs must ensure power dissipation does not exceed 300 mW. The transition frequency of the TSA884CX RFG is 50 MHz versus 60 MHz for the FMMT560QTC; applications requiring frequencies above 50 MHz must verify performance.

Temperature Range: The FMMT560QTC operates from −55°C to 150°C, while the TSA884CX RFG specification indicates operation to 150°C. Applications requiring operation below 0°C must use the FMMT560QTC.

Compliance: Both devices are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements. Both carry EAR99 export classification.

Package and Mounting: Both devices use identical SOT-23-3 surface mount packaging, ensuring mechanical and thermal compatibility on printed circuit boards.

Frequently Asked Questions (FAQ)

Q: Can the TSA884CX RFG replace the FMMT560QTC in all applications?

A: The TSA884CX RFG is electrically and mechanically compatible for applications where power dissipation remains below 300 mW, operating frequency does not exceed 50 MHz, and minimum operating temperature is not below 0°C. Applications outside these parameters require the FMMT560QTC.

Q: What is the difference in DC current gain between these devices?

A: The FMMT560QTC has a minimum DC current gain of 100 at 1 mA and 10 V. The TSA884CX RFG has a minimum DC current gain of 150 at the same conditions. Higher current gain in the TSA884CX RFG reduces base current requirements for equivalent collector current.

Q: Are the packages physically identical?

A: Yes. Both the FMMT560QTC and TSA884CX RFG use the SOT-23-3 package, also designated as TO-236-3 or SC-59. Pin configuration and footprint are identical, allowing direct board-level substitution.

Q: What is the maximum power dissipation difference?

A: The FMMT560QTC is rated for 500 mW maximum power dissipation, while the TSA884CX RFG is rated for 300 mW. Designs operating above 300 mW require the FMMT560QTC.

Q: Do both devices meet automotive qualification standards?

A: The FMMT560QTC carries AEC-Q101 automotive qualification. The TSA884CX RFG specification does not indicate AEC-Q101 qualification. Automotive applications requiring AEC-Q101 certification must use the FMMT560QTC.

Q: What is the transition frequency specification for each device?

A: The FMMT560QTC has a transition frequency of 60 MHz. The TSA884CX RFG has a transition frequency of 50 MHz. High-frequency applications operating above 50 MHz require verification with the FMMT560QTC.

Q: Are both devices RoHS compliant?

A: Yes. Both the FMMT560QTC and TSA884CX RFG are ROHS3 compliant and REACH unaffected.

Q: What is the operating temperature range for each device?

A: The FMMT560QTC operates from −55°C to 150°C. The TSA884CX RFG operates to 150°C. Applications requiring operation below 0°C must use the FMMT560QTC.

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