FMMT722TC PNP Bipolar Transistor Equivalent & Substitute Parts

Part Overview

The FMMT722TC is a PNP bipolar junction transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-23-3 package. This device operates at 70 V collector-emitter breakdown voltage with a maximum collector current of 1.5 A and a transition frequency of 200 MHz. The FMMT722TC is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector-Emitter Breakdown Voltage (Max)	70	V
Collector Current (Max)	1.5	A
Vce Saturation (Max)	260	mV @ 200mA, 1.5A
DC Current Gain (hFE Min)	300	@ 100mA, 5V
Power Dissipation (Max)	625	mW
Transition Frequency	200	MHz
Operating Temperature Range	-55 to 150	°C
Package	SOT-23-3	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the FMMT722TC are categorized based on electrical parameter compatibility and physical packaging equivalence. The primary substitution criteria are:

Parametric Equivalents (Direct Substitutes): Parts that maintain identical electrical specifications across all critical parameters including collector-emitter breakdown voltage (70 V), maximum collector current (1.5 A), Vce saturation (260 mV @ 200mA, 1.5A), DC current gain (300 @ 100mA, 5V), power dissipation (625 mW), and transition frequency (200 MHz). These parts are interchangeable without circuit modification.

Manufacturer Recommended Alternatives: Parts that operate within reduced electrical specifications but maintain the same package form factor (SOT-23-3) and general application class. These parts feature lower maximum collector current (100 mA versus 1.5 A), reduced collector-emitter breakdown voltage (65 V versus 70 V), lower power dissipation (250–300 mW versus 625 mW), and reduced transition frequency (100–200 MHz). Selection of these alternatives requires circuit-level evaluation to confirm compatibility with application current and voltage requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Ic (Max) A	Vce(br) V	Vce Sat mV	hFE (Min)	Power mW	Freq MHz	Temp °C	Package
FMMT722TC	Diodes Inc.	Obsolete	1.5	70	260	300	625	200	-55 to 150	SOT-23-3
FMMT722QTA	Diodes Inc.	Active	1.5	70	260	300	625	200	-55 to 150	SOT-23-3
FMMT722TA	Diodes Inc.	Active	1.5	70	260	300	625	200	-55 to 150	SOT-23-3
BC856,215	Nexperia USA	Active	0.1	65	650	125	250	100	-55 to 150	SOT-23-3
BC856A,215	Nexperia USA	Active	0.1	65	650	125	250	100	-55 to 150	SOT-23-3
BC856ALT1G	onsemi	Active	0.1	65	650	125	300	100	-55 to 150	SOT-23-3
BC856B,215	Nexperia USA	Active	0.1	65	650	220	250	100	-55 to 150	SOT-23-3
BC856B,235	NXP USA	Active	0.1	65	650	220	250	100	-55 to 150	SOT-23-3
BC856B-TP	Micro Commercial	Active	0.1	65	650	220	310	200	-55 to 150	SOT-23-3
BC856BLT1G	onsemi	Active	0.1	65	650	220	300	100	-55 to 150	SOT-23-3
BC856BLT3G	onsemi	Active	0.1	65	650	220	300	100	-55 to 150	SOT-23-3

Engineering Selection Recommendations

Direct Parametric Equivalents: FMMT722QTA and FMMT722TA are direct parametric equivalents manufactured by Diodes Incorporated. Both parts maintain identical electrical specifications to the FMMT722TC across all critical parameters. FMMT722QTA carries automotive-grade qualification (AEC-Q101) and active product status. FMMT722TA is available in higher inventory quantities and active product status. Both parts are suitable for direct substitution without circuit modification.

Manufacturer Recommended Alternatives: The BC856 series parts from Nexperia USA Inc., NXP USA Inc., onsemi, and Micro Commercial Co are manufacturer-recommended alternatives. These parts operate at reduced maximum collector current (100 mA), reduced collector-emitter breakdown voltage (65 V), and reduced power dissipation (250–310 mW). Selection of BC856 series alternatives requires verification that application circuit current requirements do not exceed 100 mA and that the 65 V breakdown voltage margin is acceptable for the intended application voltage. Multiple variants within the BC856 series exist with different DC current gain specifications (hFE 125 or 220) and transition frequencies (100 or 200 MHz). onsemi BC856BLT1G and BC856BLT3G variants offer the highest inventory availability and active product status with AEC-Q101 automotive qualification available for certain variants.

Frequently Asked Questions (FAQ)

Q: Can FMMT722QTA and FMMT722TA be used interchangeably with FMMT722TC?

A: Yes. FMMT722QTA and FMMT722TA are parametric equivalents with identical electrical specifications. The primary difference is packaging format: FMMT722QTA is supplied in Tape & Reel format with automotive qualification, while FMMT722TA is supplied in Cut Tape & Digi-Reel format. Both are direct substitutes for the obsolete FMMT722TC.

Q: What are the key differences between FMMT722TC and BC856 series parts?

A: The BC856 series operates at significantly reduced maximum collector current (100 mA versus 1.5 A), lower collector-emitter breakdown voltage (65 V versus 70 V), lower power dissipation (250–310 mW versus 625 mW), and reduced transition frequency (100 MHz for most variants versus 200 MHz). BC856 series parts are suitable only for applications with collector current requirements below 100 mA.

Q: Which BC856 variant should be selected for new designs?

A: BC856BLT1G and BC856BLT3G from onsemi offer the highest inventory availability, active product status, and full operating temperature range (-55°C to 150°C). Both variants maintain identical electrical specifications with 300 mW power dissipation and 100 MHz transition frequency. Selection between Cut Tape (LT1G) and Tape & Reel (LT3G) packaging depends on procurement and assembly requirements.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed are RoHS3 compliant. REACH status is unaffected for all parts. Moisture sensitivity level is MSL 1 (Unlimited) for all parts except those with unspecified MSL ratings.

Q: Can BC856 parts be used in high-current applications designed for FMMT722TC?

A: No. BC856 series parts are rated for maximum collector current of 100 mA. Applications requiring collector currents above 100 mA must use FMMT722QTA or FMMT722TA. Using BC856 parts in circuits exceeding 100 mA collector current will result in device failure.

Q: What is the difference between BC856A and BC856B variants?

A: BC856A and BC856B variants differ in DC current gain specification. BC856A specifies minimum hFE of 125 at 2 mA, 5 V. BC856B specifies minimum hFE of 220 at 2 mA, 5 V. All other electrical parameters remain identical. Selection depends on circuit bias requirements and gain tolerance specifications.

Q: Are automotive-qualified variants available?

A: Yes. FMMT722QTA carries AEC-Q101 automotive qualification. Multiple BC856 variants from Nexperia USA Inc. and NXP USA Inc. carry AEC-Q101 qualification. Automotive qualification status is specified in the product data for each part.

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