DCX68-25-13 Equivalent & Substitute Parts

Part Overview

The DCX68-25-13 is an NPN bipolar junction transistor manufactured by Diodes Incorporated, rated for 20V collector-emitter breakdown voltage and 1A maximum collector current in a surface mount SOT-89-3 package. This device is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing production and maintenance applications. The part operates across a temperature range of -55°C to 150°C and delivers 1W maximum power dissipation with a transition frequency of 330MHz.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	20	V
Current - Collector (Ic) (Max)	1	A
Power - Max	1	W
Frequency - Transition	330	MHz
Vce Saturation (Max) @ Ib, Ic	500mV @ 100mA, 1A	—
DC Current Gain (hFE) (Min) @ Ic, Vce	160 @ 500mA, 1V	—
Current - Collector Cutoff (Max)	100	nA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-243AA	—
Supplier Device Package	SOT-89-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the DCX68-25-13 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor Type: NPN
Voltage - Collector Emitter Breakdown (Max): 20V minimum
Current - Collector (Ic) (Max): 1A minimum
Vce Saturation (Max) @ Ib, Ic: 500mV @ 100mA, 1A
Current - Collector Cutoff (Max): 100nA maximum
DC Current Gain (hFE) (Min) @ Ic, Vce: 160 @ 500mA, 1V minimum
Mounting Type: Surface Mount
Package / Case: TO-243AA
Supplier Device Package: SOT-89 or SOT-89-3

Secondary Considerations:

Power dissipation capability (1W or greater)
Operating temperature range (-55°C to 150°C or wider)
Frequency - Transition (330MHz or greater preferred for performance equivalence)
Product Status (Active preferred; Last Time Buy acceptable; Obsolete not recommended)
RoHS3 Compliance and MSL rating

Substitute parts are grouped into two categories: Direct Equivalents (matching all primary criteria with active product status) and Functional Alternatives (meeting electrical requirements with acceptable parameter variations for specific applications).

Parameter Comparison

Part Number	Manufacturer	Ic (Max)	Vce Breakdown (Max)	Power (Max)	Frequency (Transition)	hFE (Min) @ Ic, Vce	Vce Sat (Max) @ Ib, Ic	Operating Temp	Product Status	Package
DCX68-25-13	Diodes Incorporated	1 A	20 V	1 W	330 MHz	160 @ 500mA, 1V	500mV @ 100mA, 1A	-55 to 150°C	Obsolete	SOT-89-3
BCX6825TA	Diodes Incorporated	1 A	20 V	1 W	100 MHz	160 @ 500mA, 1V	500mV @ 100mA, 1A	-65 to 150°C	Active	SOT-89-3
BC868,115	Nexperia USA Inc.	1 A	20 V	1.2 W	170 MHz	85 @ 500mA, 1V	500mV @ 100mA, 1A	-55 to 150°C	Active	SOT-89
CBCX68 TR PBFREE	Central Semiconductor Corp	1 A	20 V	1.2 W	65 MHz	85 @ 500mA, 1V	500mV @ 100mA, 1A	-65 to 150°C	Active	SOT-89
BCX6810H6327XTSA1	Infineon Technologies	1 A	20 V	3 W	100 MHz	85 @ 500mA, 1V	500mV @ 100mA, 1A	-55 to 150°C	Last Time Buy	PG-SOT89
BCX6816H6327XTSA1	Infineon Technologies	1 A	20 V	3 W	100 MHz	100 @ 500mA, 1V	500mV @ 100mA, 1A	-55 to 150°C	Obsolete	PG-SOT89
PBSS4320X,135	Nexperia USA Inc.	3 A	20 V	1.6 W	100 MHz	200 @ 2A, 2V	310mV @ 300mA, 3A	-55 to 150°C	Active	SOT-89
PBSS4520X,135	Nexperia USA Inc.	5 A	20 V	550 mW	125 MHz	250 @ 2A, 2V	220mV @ 500mA, 5A	-55 to 150°C	Active	SOT-89
2SD2537T100V	Rohm Semiconductor	1.2 A	25 V	2 W	200 MHz	820 @ 500mA, 5V	300mV @ 10mA, 500mA	-55 to 150°C	Active	MPT3
2PD2150,115	NXP Semiconductors	3 A	20 V	2 W	220 MHz	180 @ 100mA, 2V	500mV @ 100mA, 2A	-55 to 150°C	Active	SOT-89
BC868-25,115	Nexperia USA Inc.	2 A	20 V	500 mW	170 MHz	160 @ 500mA, 1V	600mV @ 200mA, 2A	-55 to 150°C	Active	SOT-89

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

BCX6825TA (Diodes Incorporated) is the recommended direct equivalent. This part maintains identical electrical specifications for collector current (1A), collector-emitter breakdown voltage (20V), saturation voltage, and DC current gain. The device is manufactured by the same supplier as the original DCX68-25-13, ensuring design continuity. BCX6825TA carries Active product status with extended lower operating temperature limit (-65°C versus -55°C), providing improved thermal margin. RoHS3 compliance and MSL 1 rating match the original specification. The transition frequency of 100MHz is lower than the original 330MHz but remains adequate for general-purpose switching applications. Packaging is identical SOT-89-3 in Cut Tape and Digi-Reel formats with 23,100 units in stock.

Secondary Equivalents (Acceptable Substitutes):

BC868,115 (Nexperia USA Inc.) meets all primary electrical criteria with 1A collector current and 20V breakdown voltage. This part offers higher power dissipation (1.2W versus 1W) and transition frequency of 170MHz. DC current gain is lower at 85 versus 160, requiring circuit verification in gain-sensitive applications. Active product status with 11,533 units available. SOT-89 package is mechanically compatible with SOT-89-3.

CBCX68 TR PBFREE (Central Semiconductor Corp) provides identical electrical performance at 1A and 20V with 1.2W power rating. Transition frequency of 65MHz is significantly lower, limiting use to low-frequency switching circuits. Extended operating temperature range (-65°C to 150°C) exceeds original specification. Active status with 4,562 units in inventory.

Higher Current Alternatives (For Increased Current Capacity):

PBSS4320X,135 (Nexperia USA Inc.) supports 3A collector current while maintaining 20V breakdown voltage. This part is suitable for applications requiring higher current handling than the original 1A specification. Vce saturation is improved at 310mV. AEC-Q100 automotive qualification and Active status. 11,597 units available.

PBSS4520X,135 (Nexperia USA Inc.) extends current capability to 5A with 20V breakdown voltage and improved saturation voltage of 220mV. Suitable for high-current switching applications. AEC-Q100 qualified, Active status, 4,509 units in stock.

Higher Voltage Alternative:

2SD2537T100V (Rohm Semiconductor) provides 25V collector-emitter breakdown voltage with 1.2A current rating and 2W power dissipation. This part is suitable for circuits requiring higher voltage margin. Transition frequency of 200MHz and significantly higher DC current gain (820) offer performance enhancement. Active status with 30,300 units available. Package is MPT3 (mechanically compatible TO-243AA footprint).

Higher Current and Voltage Alternative:

2PD2150,115 (NXP Semiconductors) combines 3A collector current with 20V breakdown voltage and 2W power dissipation. Transition frequency of 220MHz and DC current gain of 180 provide balanced performance. Active status with 8,715 units in inventory. SOT-89 package.

Not Recommended:

BCX6816H6327XTSA1 (Infineon Technologies) carries Obsolete product status and should not be selected for new designs despite meeting electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can BCX6825TA directly replace DCX68-25-13 without circuit modification?

A: Yes. BCX6825TA is a direct electrical equivalent with identical collector current (1A), breakdown voltage (20V), saturation voltage, and DC current gain specifications. The lower transition frequency (100MHz versus 330MHz) does not impact functionality in standard switching applications. SOT-89-3 package compatibility is confirmed. Verify PCB footprint alignment before assembly.

Q: What is the primary difference between DCX68-25-13 and BC868,115?

A: The primary difference is DC current gain: BC868,115 specifies 85 minimum versus 160 for DCX68-25-13. Both devices support 1A at 20V with identical saturation voltage. Applications requiring precise gain matching or high-impedance base drive circuits should be evaluated. BC868,115 offers higher power dissipation (1.2W) and transition frequency (170MHz).

Q: Are SOT-89 and SOT-89-3 packages interchangeable?

A: SOT-89 and SOT-89-3 are mechanically compatible three-lead surface mount packages with identical TO-243AA case dimensions and pin spacing. PCB footprints are interchangeable. Verify supplier device package designation in component documentation to confirm exact pin configuration.

Q: When should PBSS4320X,135 or PBSS4520X,135 be selected instead of direct equivalents?

A: Select PBSS4320X,135 (3A) or PBSS4520X,135 (5A) when the application requires collector current exceeding 1A. These parts maintain 20V breakdown voltage and offer improved saturation voltage characteristics. Both carry AEC-Q100 automotive qualification. Verify circuit design supports higher current capability to avoid thermal stress.

Q: Is 2SD2537T100V suitable for 20V applications?

A: 2SD2537T100V is rated for 25V collector-emitter breakdown voltage, providing 5V margin above 20V applications. This part is suitable for 20V circuits and offers performance advantages including higher current (1.2A), power dissipation (2W), and DC current gain (820). Package is MPT3, mechanically compatible with TO-243AA footprint. Verify thermal management for 2W power dissipation.

Q: What is the significance of RoHS3 compliance and MSL 1 rating?

A: RoHS3 compliance confirms the device contains no restricted substances (lead, cadmium, mercury, etc.) and meets environmental regulations for electronic equipment. MSL 1 (Unlimited) indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All recommended substitutes maintain these compliance levels.

Q: Can BC868-25,115 replace DCX68-25-13 in high-current applications?

A: BC868-25,115 supports 2A collector current, exceeding the original 1A specification. However, saturation voltage increases to 600mV at 2A versus 500mV at 1A for DCX68-25-13. This part is suitable for applications requiring 1-2A switching with acceptable saturation voltage increase. DC current gain matches the original at 160 @ 500mA, 1V.

Q: What inventory considerations apply to substitute selection?

A: BCX6825TA offers the highest inventory (23,100 units), ensuring long-term availability. 2SD2537T100V (30,300 units) and PBSS4320X,135 (11,597 units) provide substantial stock. BC868,115 (11,533 units) and PBSS4520X,135 (4,509 units) maintain adequate supply. BCX6810H6327XTSA1 (792 units) and BCX6816H6327XTSA1 (736 units) have limited inventory and should be evaluated for long-term production requirements.

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