ZXTCM322TA Equivalent & Substitute Parts

Part Overview

The ZXTCM322TA is a Surface Mount NPN Bipolar Junction Transistor manufactured by Diodes Incorporated, rated for 50V collector-emitter breakdown voltage and 4A maximum collector current. This device is designed for general-purpose switching and amplification applications requiring moderate power dissipation up to 3W and transition frequency of 165MHz. The ZXTCM322TA is classified as Obsolete, necessitating identification of functionally equivalent active alternatives to maintain design continuity and ensure long-term component availability for new production and field replacements.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	50	V
Current - Collector (Ic) (Max)	4	A
Power - Max	3	W
Frequency - Transition	165	MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 2A, 2V	—
Vce Saturation (Max) @ Ib, Ic	320mV @ 200mA, 4A	—
Current - Collector Cutoff (Max)	25	nA
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the ZXTCM322TA is determined by electrical parameter equivalence across all critical performance specifications. The substitute part ZXTN619MATA maintains identical electrical characteristics including maximum collector current (4A), collector-emitter breakdown voltage (50V), maximum power dissipation (3W), transition frequency (165MHz), DC current gain (100 @ 2A, 2V), saturation voltage (320mV @ 200mA, 4A), and collector cutoff current (25nA). Both devices operate across the same temperature range (-55°C to 150°C junction temperature) and are classified as NPN transistors suitable for identical circuit applications.

The primary distinction between these parts is packaging format and product status. The ZXTCM322TA uses 3-MLP/DFN (2x2) packaging and is Obsolete, while the ZXTN619MATA uses DFN2020B-3 packaging and maintains Active product status. Both packages are Surface Mount configurations with equivalent thermal and electrical performance characteristics. Substitution is valid when PCB layout and footprint design accommodate the DFN2020B-3 package geometry.

Parameter Comparison

Parameter	ZXTCM322TA	ZXTN619MATA	Match
Transistor Type	NPN	NPN	Yes
Voltage - Collector Emitter Breakdown (Max)	50 V	50 V	Yes
Current - Collector (Ic) (Max)	4 A	4 A	Yes
Power - Max	3 W	3 W	Yes
Frequency - Transition	165 MHz	165 MHz	Yes
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 2A, 2V	100 @ 2A, 2V	Yes
Vce Saturation (Max) @ Ib, Ic	320mV @ 200mA, 4A	320mV @ 200mA, 4A	Yes
Current - Collector Cutoff (Max)	25 nA	25 nA	Yes
Operating Temperature Range	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	Yes
Mounting Type	Surface Mount	Surface Mount	Yes
Product Status	Obsolete	Active	Different
Package / Case	3-PowerSMD, Flat Leads	3-UDFN	Different
Supplier Device Package	3-MLP/DFN (2x2)	DFN2020B-3	Different
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Yes
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Yes
REACH Status	REACH Unaffected	REACH Unaffected	Yes

Engineering Selection Recommendations

The ZXTN619MATA is the direct electrical equivalent for the obsolete ZXTCM322TA. Selection of ZXTN619MATA is appropriate for new designs and production applications where component availability is critical. Both devices carry identical RoHS3 compliance and REACH Unaffected status, ensuring regulatory alignment across manufacturing environments.

The transition from ZXTCM322TA to ZXTN619MATA requires PCB layout modification to accommodate the DFN2020B-3 package footprint in place of the 3-MLP/DFN (2x2) package. Electrical circuit performance remains unchanged due to complete parameter equivalence. The ZXTN619MATA maintains Active product status with established supply chain availability, eliminating obsolescence risk associated with the ZXTCM322TA.

Frequently Asked Questions (FAQ)

Q: Can ZXTN619MATA directly replace ZXTCM322TA in existing circuit designs?

A: Electrical substitution is complete. All electrical parameters are identical. Physical substitution requires PCB footprint redesign to accommodate the DFN2020B-3 package geometry instead of the 3-MLP/DFN (2x2) package.

Q: What are the package differences between these two parts?

A: ZXTCM322TA uses 3-MLP/DFN (2x2) packaging with flat leads. ZXTN619MATA uses DFN2020B-3 packaging. Both are Surface Mount configurations with equivalent thermal performance. Pin count and electrical connections are identical; only physical dimensions and footprint differ.

Q: Are there compliance or regulatory differences between these parts?

A: No. Both devices are ROHS3 Compliant, REACH Unaffected, and carry identical environmental certifications. Regulatory requirements are satisfied by either part.

Q: Why is ZXTCM322TA classified as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. ZXTN619MATA is the active replacement offering identical electrical performance with ongoing manufacturing support.

Q: What is the moisture sensitivity level for these transistors?

A: Both ZXTCM322TA and ZXTN619MATA carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions during storage or handling.

Q: Can these parts be used interchangeably in high-frequency switching applications?

A: Yes. Both devices feature 165MHz transition frequency and identical saturation characteristics, supporting equivalent performance in switching circuits operating within this frequency range.

Q: What is the maximum power dissipation for both parts?

A: Both ZXTCM322TA and ZXTN619MATA are rated for 3W maximum power dissipation. Thermal management design remains unchanged between the two parts.

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