2PD602AQ,115 Equivalent & Substitute Parts

Part Overview

The 2PD602AQ,115 is an NPN bipolar junction transistor manufactured by NXP USA Inc., rated for 50 V collector-emitter breakdown voltage and 500 mA maximum collector current. This surface mount device in SOT-23-3 (TO-236-3) package is designed for general-purpose switching and amplification applications requiring 250 mW power dissipation capability.

The 2PD602AQ,115 carries an obsolete product status. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this transistor.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	50	V
Current - Collector (Ic) (Max)	500	mA
Power - Max	250	mW
Frequency - Transition	140	MHz
Vce Saturation (Max) @ Ib, Ic	600mV @ 30mA, 300mA	—
DC Current Gain (hFE) (Min) @ Ic, Vce	85 @ 150mA, 10V	—
Operating Temperature (Max)	150	°C
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 2PD602AQ,115 is determined by the following critical electrical and mechanical parameters:

Mandatory Compatibility Criteria:

Transistor Type: NPN
Package / Case: TO-236-3, SC-59, SOT-23-3 (surface mount)
Mounting Type: Surface Mount
Voltage - Collector Emitter Breakdown (Max): Equal to or greater than 50 V
Current - Collector (Ic) (Max): Equal to or greater than 500 mA
Power - Max: Equal to or greater than 250 mW
Operating Temperature (Max): Equal to or greater than 150°C
RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories based on voltage rating:

Category A: 50 V Rated Devices Parts meeting or exceeding the original 50 V specification: MMBT6428LT1G, FMMT619TA

Category B: 45 V Rated Devices Parts with 45 V rating, suitable for applications where the full 50 V margin is not required: BC817-25 RFG, BC817-25LT1G, BC817-40LT1G, BC817-40LT3G, BC817K40E6433HTMA1, BCX19T116, MMBT100

All substitute parts maintain SOT-23-3 package compatibility, surface mount configuration, RoHS3 compliance, and operating temperature capability to 150°C or higher.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce(br) (Max) V	Power (Max) mW	fT (MHz)	hFE (Min)	Product Status	Package
2PD602AQ,115	NXP USA Inc.	500	50	250	140	85	Obsolete	SOT-23-3
MMBT6428LT1G	onsemi	200	50	225	700	250	Active	SOT-23-3
FMMT619TA	Diodes Incorporated	2000	50	625	165	200	Active	SOT-23-3
BC817-25 RFG	Taiwan Semiconductor Corporation	500	45	300	100	160	Active	SOT-23-3
BC817-25LT1G	onsemi	500	45	300	100	160	Active	SOT-23-3
BC817-40LT1G	onsemi	500	45	300	100	250	Active	SOT-23-3
BC817-40LT3G	onsemi	500	45	300	100	250	Active	SOT-23-3
BC817K40E6433HTMA1	Infineon Technologies	500	45	500	170	250	Last Time Buy	SOT-23-3
BCX19T116	Rohm Semiconductor	500	45	350	250	100	Not For New Designs	SOT-23-3
FMMT413TD	Diodes Incorporated	100	50	330	150	50	Active	SOT-23-3
MMBT100	onsemi	500	45	350	250	100	Active	SOT-23-3

Engineering Selection Recommendations

Primary Substitutes (Active Product Status, Full Compatibility):

BC817-25LT1G and BC817-40LT1G from onsemi are recommended as primary substitutes. Both devices maintain 500 mA collector current capability, SOT-23-3 package compatibility, and active product status. The BC817-40LT1G variant offers higher DC current gain (250 vs. 160), providing improved switching characteristics. The 45 V rating is suitable for applications where the 50 V specification margin is not critical to circuit operation.

FMMT619TA from Diodes Incorporated provides 50 V rated operation matching the original specification, with enhanced current handling (2 A) and power dissipation (625 mW). This device is appropriate for applications requiring the full 50 V voltage margin or higher current capability.

Secondary Substitutes (Active Status, Current Limitations):

MMBT100 from onsemi offers 500 mA capability with 45 V rating and active product status. This device is suitable for direct pin-compatible replacement in applications not requiring the full 50 V specification.

MMBT6428LT1G from onsemi maintains 50 V rating but is limited to 200 mA collector current. This device is appropriate only for applications where collector current does not exceed 200 mA.

Not Recommended for New Designs:

BC817K40E6433HTMA1 (Infineon) carries Last Time Buy status. BCX19T116 (Rohm Semiconductor) is marked Not For New Designs. FMMT413TD is limited to 100 mA collector current and is unsuitable for 500 mA applications.

All recommended substitutes maintain RoHS3 compliance, unlimited moisture sensitivity level (MSL 1), and operating temperature capability to 150°C or higher.

Frequently Asked Questions (FAQ)

Q: Can the 2PD602AQ,115 be replaced with a 45 V rated device in my application?

A: Substitution with 45 V rated devices (BC817 series, MMBT100) is permissible only if your circuit design does not require the full 50 V collector-emitter breakdown margin. Review your application's maximum operating voltage to confirm 45 V rating adequacy. If your design operates near or above 45 V, use 50 V rated substitutes (FMMT619TA, MMBT6428LT1G).

Q: What is the difference between BC817-25LT1G and BC817-40LT1G?

A: Both devices are identical in electrical ratings (45 V, 500 mA, SOT-23-3 package) and product status (Active). The primary difference is DC current gain: BC817-25LT1G specifies minimum hFE of 160 at 100 mA, while BC817-40LT1G specifies minimum hFE of 250 at the same condition. The "-40" suffix indicates higher gain. Select BC817-40LT1G for applications requiring higher current gain or faster switching response.

Q: Is the SOT-23-3 package identical across all substitute parts?

A: All listed substitute parts use TO-236-3, SC-59, or SOT-23-3 designations, which are equivalent package specifications for surface mount three-terminal devices. Pin configuration and footprint are identical, enabling direct PCB replacement without layout modification.

Q: Why is FMMT619TA rated for 2 A when the original part is 500 mA?

A: FMMT619TA is a higher-current variant within the same package family. Its 2 A rating provides design margin for applications requiring higher current handling. It remains compatible with the 2PD602AQ,115 footprint and can be used as a direct substitute. The higher current rating does not create incompatibility; it provides additional capability.

Q: Can I use MMBT6428LT1G as a direct replacement?

A: MMBT6428LT1G maintains 50 V rating and SOT-23-3 package compatibility but is limited to 200 mA maximum collector current. Use this device only if your application's collector current does not exceed 200 mA. For applications requiring the full 500 mA capability, select BC817-25LT1G, BC817-40LT1G, or FMMT619TA.

Q: What is the significance of "Last Time Buy" status for BC817K40E6433HTMA1?

A: Last Time Buy status indicates the manufacturer has announced end-of-life for this part number. While currently available, future availability is not guaranteed. For new designs or long-term production requirements, select parts with Active product status: BC817-25LT1G, BC817-40LT1G, MMBT100, or FMMT619TA.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 Compliant certification, matching the original 2PD602AQ,115 specification. All devices maintain unlimited moisture sensitivity level (MSL 1) and REACH Unaffected status.

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