BC847S Equivalent & Substitute Parts

Part Overview

The BC847S is a dual NPN bipolar junction transistor (BJT) manufactured by onsemi in a 6-pin surface mount SC-88/SOT-363 package. This component is rated for 45V collector-emitter breakdown voltage, 200mA maximum collector current, and 300mW power dissipation across an operating temperature range of -55°C to 150°C. The BC847S is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and production continuity. Substitute parts must maintain compatibility with existing PCB layouts while meeting or exceeding the electrical performance requirements of the original specification.

Key Parameters

Parameter	BC847S Value	Unit
Transistor Type	2 NPN (Dual)	—
Voltage - Collector Emitter Breakdown (Max)	45	V
Current - Collector (Ic) (Max)	200	mA
Vce Saturation (Max) @ Ib, Ic	650mV @ 5mA, 100mA	mV
Current - Collector Cutoff (Max)	15	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	110 @ 2mA, 5V	—
Power - Max	300	mW
Frequency - Transition	200	MHz
Operating Temperature	-55 to 150	°C
Package / Case	6-TSSOP, SC-88, SOT-363	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BC847S is determined by the following critical parameters: package compatibility (6-TSSOP/SC-88/SOT-363), transistor configuration (dual NPN), voltage rating (minimum 45V collector-emitter breakdown), current rating (minimum 200mA collector current), and operating temperature range (-55°C to 150°C). Parts are grouped into three categories based on electrical performance alignment:

Category 1: Direct Electrical Equivalents (45V, 100mA–200mA) Parts BC847BDW1T1G, BC847BDW1T3G, BC847CDW1T1G, and NST45011MW6T1G maintain the 45V voltage rating and SC-88/SOT-363 package. These parts operate at reduced maximum collector current (100mA) compared to the BC847S (200mA), but retain full voltage compatibility and identical package footprint. These are suitable for applications where the 100mA current limit does not exceed circuit requirements.

Category 2: Mixed Voltage/Current Trade-offs (40V, 200mA–600mA) Parts MBT2222ADW1T1G, MBT3904DW1T1G, MBT3904DW1T3G, and MBT6429DW1T1G operate at 40V collector-emitter breakdown voltage with varying current ratings (200mA to 600mA). These parts are suitable only for applications where the 40V rating is acceptable and do not require the full 45V specification of the BC847S.

Category 3: Specialized Configurations Part BC847BPDW1T1G contains both NPN and PNP transistors in a single package, providing additional circuit design flexibility while maintaining 45V voltage rating and SC-88/SOT-363 package compatibility.

Parameter Comparison

Part Number	Manufacturer	Transistor Type	Ic (Max) mA	Vce Breakdown (Max) V	Vce Sat (Max) mV	hFE (Min)	Power (Max) mW	Frequency MHz	Package	Product Status
BC847S	onsemi	2 NPN (Dual)	200	45	650 @ 5mA, 100mA	110 @ 2mA, 5V	300	200	SC-88/SOT-363	Obsolete
BC847BDW1T1G	onsemi	2 NPN (Dual)	100	45	600 @ 5mA, 100mA	200 @ 2mA, 5V	380	100	SC-88/SOT-363	Active
BC847BDW1T3G	onsemi	2 NPN (Dual)	100	45	600 @ 5mA, 100mA	200 @ 2mA, 5V	380	100	SC-88/SOT-363	Active
BC847BPDW1T1G	onsemi	NPN, PNP	100	45	600 @ 5mA, 100mA	200 @ 2mA, 5V	380	100	SC-88/SOT-363	Active
BC847CDW1T1G	onsemi	2 NPN (Dual)	100	45	600 @ 5mA, 100mA	420 @ 2mA, 5V	380	100	SC-88/SOT-363	Active
MBT2222ADW1T1G	onsemi	2 NPN (Dual)	600	40	1000 @ 50mA, 500mA	100 @ 150mA, 10V	150	300	SC-88/SOT-363	Active
MBT3904DW1T1G	onsemi	2 NPN (Dual)	200	40	300 @ 5mA, 50mA	100 @ 10mA, 1V	150	300	SC-88/SOT-363	Active
MBT3904DW1T3G	onsemi	2 NPN (Dual)	200	40	300 @ 5mA, 50mA	100 @ 10mA, 1V	150	300	SC-88/SOT-363	Active
MBT6429DW1T1G	onsemi	2 NPN (Dual)	200	45	600 @ 5mA, 100mA	500 @ 100µA, 5V	150	700	SC-88/SOT-363	Active
NST45011MW6T1G	onsemi	2 NPN (Dual) Matched Pair	100	45	600 @ 5mA, 100mA	200 @ 2mA, 5V	380	100	SC-88/SOT-363	Active
NSVT45011MW6T3G	onsemi	2 NPN (Dual)	100	45	600 @ 5mA, 100mA	200 @ 2mA, 5V	380	100	SC-88/SOT-363	Active

Engineering Selection Recommendations

For Direct Replacement (45V Voltage Requirement)

BC847BDW1T1G, BC847BDW1T3G, and BC847CDW1T1G are active production parts manufactured by onsemi with identical SC-88/SOT-363 package footprints. These parts maintain the 45V collector-emitter breakdown voltage specification of the BC847S. All three parts carry RoHS3 compliance and REACH Unaffected status. Selection between these three parts depends on current requirements: if circuit design operates at or below 100mA collector current, any of these three parts provide direct electrical substitution. BC847CDW1T1G offers higher DC current gain (420 minimum) compared to BC847BDW1T1G and BC847BDW1T3G (200 minimum), providing improved amplification characteristics in low-current applications.

NST45011MW6T1G and NSVT45011MW6T3G are matched-pair variants maintaining 45V rating and SC-88/SOT-363 package. These parts are suitable for applications requiring transistor matching characteristics, such as differential amplifiers or precision current mirrors.

For Applications Accepting 40V Voltage Rating

MBT3904DW1T1G and MBT3904DW1T3G provide 200mA maximum collector current matching the BC847S specification, with 40V collector-emitter breakdown voltage. These parts are suitable for applications where the 40V rating is acceptable and do not require the full 45V specification. Both parts feature improved saturation voltage characteristics (300mV maximum) and higher transition frequency (300MHz) compared to the BC847S.

MBT6429DW1T1G maintains the 45V voltage rating with 200mA collector current and offers significantly higher transition frequency (700MHz) and DC current gain (500 minimum), suitable for high-frequency applications.

Compliance and Availability

All substitute parts listed carry RoHS3 compliance and REACH Unaffected status. All parts are classified as active production items with confirmed inventory availability. MSL rating of 1 (Unlimited) applies to all substitute parts, matching the BC847S specification.

Frequently Asked Questions (FAQ)

Q: Can BC847BDW1T1G directly replace BC847S in existing designs?

A: BC847BDW1T1G maintains identical package footprint (SC-88/SOT-363) and voltage rating (45V). However, maximum collector current is reduced from 200mA to 100mA. Direct replacement is possible only if circuit design operates at or below 100mA collector current. Verify circuit current requirements before substitution.

Q: What is the difference between BC847BDW1T1G and BC847CDW1T1G?

A: Both parts share identical electrical ratings (45V, 100mA, SC-88/SOT-363 package). The primary difference is DC current gain: BC847CDW1T1G specifies minimum 420 hFE at 2mA/5V, while BC847BDW1T1G specifies minimum 200 hFE. BC847CDW1T1G is preferred for applications requiring higher amplification in low-current signal paths.

Q: Why would I select MBT3904DW1T1G over BC847BDW1T1G?

A: MBT3904DW1T1G operates at 40V (versus 45V) but provides 200mA collector current (matching BC847S), superior saturation voltage (300mV versus 650mV), and higher transition frequency (300MHz versus 100MHz). Selection depends on whether the 40V rating is acceptable for the application and whether improved high-frequency performance is required.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance and REACH Unaffected status, matching the environmental compliance profile of the BC847S.

Q: What is the significance of matched-pair variants NST45011MW6T1G and NSVT45011MW6T3G?

A: These parts are specifically designed for applications requiring precise transistor matching, such as differential amplifiers, logarithmic converters, or precision current mirrors. Matched-pair variants guarantee tighter parameter tolerances between the two transistors within the package. Standard dual-transistor parts (BC847BDW1T1G, BC847CDW1T1G) do not provide this matching guarantee.

Q: Can I use MBT6429DW1T1G as a direct replacement for BC847S?

A: MBT6429DW1T1G maintains 45V voltage rating and 200mA collector current, providing full electrical compatibility. The primary advantage is significantly higher transition frequency (700MHz versus 200MHz) and higher DC current gain (500 minimum versus 110 minimum). This part is suitable for high-frequency applications where the BC847S may be bandwidth-limited. Package footprint (SC-88/SOT-363) is identical.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. This applies to both the BC847S and all substitute parts listed, simplifying inventory management and reducing handling requirements.

Q: Are there any substitutes with different package options?

A: All substitute parts listed maintain the 6-TSSOP/SC-88/SOT-363 package format. No alternative package options are provided in this substitution list. If alternative packages are required, separate component research is necessary.

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