FMMTA06TC Equivalent & Substitute Parts

Part Overview

The FMMTA06TC is an NPN bipolar junction transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-23-3 package. This device is rated for 80 V collector-emitter breakdown voltage and 500 mA maximum collector current, with a maximum power dissipation of 330 mW. The FMMTA06TC is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, current capacity, and thermal characteristics while accommodating modern supply chain availability.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	80	V
Current - Collector (Ic) (Max)	500	mA
Power - Max	330	mW
Frequency - Transition	100	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 FMMTA06TC is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

Transistor Type: NPN
Voltage - Collector Emitter Breakdown (Max): 80 V minimum
Current - Collector (Ic) (Max): 500 mA minimum
Package / Case: SOT-23-3 (TO-236-3, SC-59)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Allowable Variation Parameters:

Power - Max: 200 mW or greater (substitute parts may exceed original specification)
Frequency - Transition: 100 MHz or greater (substitute parts may exceed original specification)
DC Current Gain (hFE): Varies by part; minimum values differ across substitutes
Vce Saturation: Varies by part; all substitutes remain within acceptable saturation ranges
Operating Temperature Range: Minimum -55°C to maximum 150°C (substitutes may have different lower limits)

All identified substitute parts meet or exceed the mandatory equivalence parameters and are classified as active products with current manufacturing status and full RoHS3 compliance.

Parameter Comparison

Parameter	FMMTA06TC (Diodes)	2SD1782KT146Q (Rohm)	2SD1782KT146R (Rohm)	CMPT3019 BK PBFREE (Central Semi)	PMBTA06,215 (Nexperia)	PMBTA06,235 (Nexperia)
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	80 V	80 V	80 V	80 V	80 V	80 V
Current - Collector (Ic) (Max)	500 mA	500 mA	500 mA	500 mA	500 mA	500 mA
Power - Max	330 mW	200 mW	200 mW	350 mW	250 mW	250 mW
Frequency - Transition	100 MHz	120 MHz	120 MHz	400 MHz	100 MHz	100 MHz
Operating Temperature (Max)	150°C	150°C	150°C	150°C	150°C	150°C
Package / Case	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (Nexperia PMBTA06 Series):

The PMBTA06,215 and PMBTA06,235 are direct functional equivalents to the FMMTA06TC. Both parts maintain identical electrical specifications for voltage, current, and frequency ratings. The PMBTA06,215 carries AEC-Q101 automotive qualification, making it suitable for applications requiring automotive-grade components. Both variants are manufactured by Nexperia USA Inc., classified as active products with substantial inventory availability, and maintain full ROHS3 compliance. These parts are recommended as primary substitutes due to specification parity and established supply chain presence.

Secondary Substitutes (Rohm 2SD1782 Series):

The 2SD1782KT146Q and 2SD1782KT146R are active Rohm Semiconductor products that meet all mandatory equivalence parameters. Both variants operate at 80 V breakdown voltage and 500 mA maximum collector current. The 2SD1782KT146R exhibits higher DC current gain (180 @ 100mA, 3V) compared to the 2SD1782KT146Q (120 @ 100mA, 3V). These parts feature 120 MHz transition frequency, exceeding the original 100 MHz specification. Power dissipation is rated at 200 mW, which is lower than the original 330 mW specification; circuit designs must account for reduced thermal headroom. Both parts are ROHS3 compliant and available in high inventory quantities.

Alternative Substitute (Central Semiconductor CMPT3019):

The CMPT3019 BK PBFREE is an active Central Semiconductor product that exceeds original specifications in multiple parameters. This part provides 400 MHz transition frequency and 350 mW power dissipation, both superior to the FMMTA06TC. The CMPT3019 operates across an extended temperature range of -65°C to 150°C, providing enhanced low-temperature performance. All mandatory electrical parameters are met. This part is suitable for applications requiring enhanced frequency response or thermal margin. ROHS3 compliance is confirmed.

Compliance and Regulatory Status:

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification, matching the regulatory profile of the original FMMTA06TC. Moisture sensitivity level is rated as MSL 1 (Unlimited) across all parts, indicating no special moisture handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the PMBTA06,215 and PMBTA06,235 be used interchangeably with the FMMTA06TC?

A: Yes. Both PMBTA06 variants maintain identical electrical specifications for collector-emitter breakdown voltage (80 V), maximum collector current (500 mA), transition frequency (100 MHz), and operating temperature range (to 150°C). Package and mounting type are identical (SOT-23-3, surface mount). The primary difference is that PMBTA06,215 carries AEC-Q101 automotive qualification, while PMBTA06,235 does not. Both are ROHS3 compliant and suitable for direct substitution.

Q: What is the difference between the 2SD1782KT146Q and 2SD1782KT146R?

A: Both parts are electrically equivalent with respect to voltage, current, and frequency ratings. The primary difference is DC current gain: the 2SD1782KT146R specifies a minimum hFE of 180 @ 100mA, 3V, while the 2SD1782KT146Q specifies 120 @ 100mA, 3V. Circuit designs relying on specific current gain characteristics should account for this variation. Both parts are rated for 200 mW maximum power dissipation, which is lower than the original FMMTA06TC specification of 330 mW.

Q: Why do some substitute parts have lower power dissipation ratings than the FMMTA06TC?

A: The 2SD1782KT146Q and 2SD1782KT146R are rated for 200 mW maximum power dissipation, compared to the FMMTA06TC specification of 330 mW. This represents a design difference between manufacturers and does not indicate functional incompatibility. Circuits designed for the FMMTA06TC must ensure that actual power dissipation remains within the lower 200 mW limit when using these Rohm substitutes. The CMPT3019 and PMBTA06 variants provide 350 mW and 250 mW ratings respectively, offering greater thermal margin.

Q: Is the CMPT3019 BK PBFREE suitable for high-frequency applications?

A: Yes. The CMPT3019 features a transition frequency of 400 MHz, significantly exceeding the original FMMTA06TC specification of 100 MHz. This part is suitable for applications requiring enhanced frequency response. All other electrical parameters (voltage, current, temperature) remain compatible with the original specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts—PMBTA06,215, PMBTA06,235, 2SD1782KT146Q, 2SD1782KT146R, and CMPT3019 BK PBFREE—are ROHS3 compliant. All parts also maintain REACH unaffected status and EAR99 export classification, matching the regulatory profile of the original FMMTA06TC.

Q: What is the significance of the AEC-Q101 qualification on the PMBTA06,215?

A: AEC-Q101 is an automotive industry qualification standard. The PMBTA06,215 carries this qualification, indicating suitability for automotive applications requiring qualified components. The PMBTA06,235 does not carry this qualification. For non-automotive applications, both parts are functionally equivalent.

Q: Can the FMMTA06TC be replaced in existing designs without circuit modification?

A: The PMBTA06,215 and PMBTA06,235 are direct replacements requiring no circuit modification. The 2SD1782KT146Q and 2SD1782KT146R require verification that circuit power dissipation remains within the 200 mW limit. The CMPT3019 BK PBFREE is compatible but offers enhanced performance characteristics that may benefit circuit operation. All parts use identical SOT-23-3 packaging and surface mount configuration.

Q: What inventory status should be considered when selecting a substitute?

A: The PMBTA06,215 has 90,200 units in stock, PMBTA06,235 has 27,772 units, 2SD1782KT146R has 120,480 units, 2SD1782KT146Q has 101,416 units, and CMPT3019 BK PBFREE has 996 units. All parts are classified as active products with current manufacturing status. Inventory levels should be evaluated based on production volume and supply chain requirements.

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