BC847AT-TP Equivalent & Substitute Parts

Part Overview

The BC847AT-TP is a small-signal NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This surface mount device operates at 45 V collector-emitter breakdown voltage with a maximum collector current of 100 mA and transition frequency of 100 MHz. The part is Active status and RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter ranges. Alternative sources and package options are available from manufacturers including NXP Semiconductors, Nexperia USA Inc., and Diodes Incorporated.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Collector Current (Max)	100	mA
Collector-Emitter Breakdown Voltage (Max)	45	V
Transition Frequency	100	MHz
Power Dissipation (Max)	150	mW
Operating Temperature Range	-55 to 150	°C
Package Type	SOT-523	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Transistor type: NPN
Collector current rating: 100 mA (maximum)
Collector-emitter breakdown voltage: 45 V (maximum)
Transition frequency: 100 MHz (minimum)
Operating temperature range: -55°C to 150°C (minimum requirement)

Mechanical Compatibility Criteria:

Surface mount technology
Package compatibility (SOT-523 or equivalent footprint)
RoHS3 compliance
MSL rating: 1 (Unlimited)

Substitution Groups:

Group 1: SOT-523 Package (Direct Footprint Match) Parts maintaining SOT-523 package with 150 mW power rating and identical electrical specifications.

Group 2: SOT-323 Package (Alternate Surface Mount) Parts with SOT-323 (SC-70) package offering 200 mW power rating with equivalent electrical performance. Package footprint differs but maintains surface mount compatibility.

Group 3: TO-236AB Package (Larger Surface Mount) Parts with TO-236AB (SOT-23-3, SC-59) package offering 250 mW power rating. Larger footprint with enhanced thermal performance.

All substitute parts maintain NPN type, 100 mA collector current, 45 V breakdown voltage, 100 MHz transition frequency, and RoHS3 compliance.

Parameter Comparison

Part Number	Manufacturer	Package	Ic (Max) mA	Vce(br) V	Vce(sat) @ 5mA, 100mA mV	hFE (Min) @ 2mA, 5V	Power (Max) mW	Freq (MHz)	Temp Range °C	Grade
BC847AT-TP	Micro Commercial Co	SOT-523	100	45	600	110	150	100	-55 to 150	Standard
BC847AW,115	NXP Semiconductors	SOT-323	100	45	400	110	200	100	-55 to 150	Automotive
BC847AW,135	Nexperia USA Inc.	SOT-323	100	45	400	110	200	100	-55 to 150	Standard
BC847B,215	Nexperia USA Inc.	TO-236AB	100	45	400	200	250	100	-55 to 150	Automotive
BC847B,235	Nexperia USA Inc.	TO-236AB	100	45	400	200	250	100	-55 to 150	Automotive
BC847BT-7-F	Diodes Incorporated	SOT-523	100	45	600	200	150	100	-55 to 150	Standard
BC847BW,115	NXP USA Inc.	SOT-323	100	45	400	200	200	100	-55 to 150	Automotive
BC847BW,135	Nexperia USA Inc.	SOT-323	100	45	400	200	200	100	-55 to 150	Standard
BC847C,215	Nexperia USA Inc.	TO-236AB	100	45	400	420	250	100	-55 to 150	Automotive
BC847C,235	Nexperia USA Inc.	TO-236AB	100	45	400	420	250	100	-55 to 150	Automotive
BC847CT-7-F	Diodes Incorporated	SOT-523	100	45	600	420	150	100	-55 to 150	Standard

Engineering Selection Recommendations

For Direct Footprint Replacement (SOT-523 Package):

BC847BT-7-F (Diodes Incorporated) and BC847CT-7-F (Diodes Incorporated) maintain identical SOT-523 package geometry and 150 mW power rating. Both parts are RoHS3 compliant with MSL 1 rating and Active product status. BC847BT-7-F provides hFE minimum of 200 at specified conditions, while BC847CT-7-F provides hFE minimum of 420. Selection between these variants depends on DC current gain requirements for the application circuit.

For Enhanced Thermal Performance (TO-236AB Package):

BC847B,215, BC847B,235, BC847C,215, and BC847C,235 offer TO-236AB package with 250 mW power dissipation capability. All variants carry Automotive grade qualification with AEC-Q101 certification. BC847B variants provide hFE minimum of 200, while BC847C variants provide hFE minimum of 420. These parts are suitable for applications requiring higher power handling or thermal margin.

For SOT-323 Package Option:

BC847AW,115, BC847AW,135, BC847BW,115, and BC847BW,135 provide SOT-323 (SC-70) package with 200 mW power rating. NXP and Nexperia variants with ",115" designation are available in Bulk packaging, while ",135" variants are supplied in Tape & Reel. Automotive-grade options (BC847AW,115 and BC847BW,115) include AEC-Q101 qualification.

All substitute parts maintain Active product status, RoHS3 compliance, and MSL 1 rating equivalent to the BC847AT-TP.

Frequently Asked Questions (FAQ)

Q: Can BC847BT-7-F replace BC847AT-TP in a direct footprint substitution?

A: Yes. Both parts use SOT-523 package with identical pin configuration. Electrical parameters match: 100 mA collector current, 45 V breakdown voltage, 100 MHz transition frequency, and -55°C to 150°C operating range. Both are RoHS3 compliant with MSL 1. The BC847BT-7-F provides hFE minimum of 200 compared to 110 for BC847AT-TP, which represents improved DC current gain performance within the same electrical class.

Q: What is the difference between SOT-523 and SOT-323 packages?

A: SOT-523 and SOT-323 are both surface mount packages for three-terminal transistors but differ in physical dimensions and thermal characteristics. SOT-523 is smaller with 150 mW power rating. SOT-323 (SC-70) is larger with 200 mW power rating. PCB layout and footprint design must accommodate the selected package. Substitution between these packages requires PCB redesign.

Q: Are automotive-grade BC847 variants interchangeable with standard-grade parts?

A: Automotive-grade parts (BC847AW,115, BC847B,215, BC847B,235, BC847C,215, BC847C,235, BC847BW,115) carry AEC-Q101 qualification and meet additional reliability and qualification requirements. Standard-grade parts do not carry this certification. Automotive-grade parts are suitable for use in standard applications, but standard-grade parts are not qualified for automotive applications. Selection depends on end-application requirements.

Q: What determines hFE variation across BC847 variants?

A: The BC847 family includes A, B, and C variants with different DC current gain (hFE) specifications. BC847A variants provide hFE minimum of 110, BC847B variants provide hFE minimum of 200, and BC847C variants provide hFE minimum of 420. All variants maintain identical voltage, current, and frequency ratings. Selection is based on circuit bias and amplification requirements.

Q: Can I use BC847C,235 in place of BC847AT-TP?

A: Electrical substitution is valid: both maintain 100 mA collector current, 45 V breakdown voltage, 100 MHz transition frequency, and -55°C to 150°C operating range. However, BC847C,235 uses TO-236AB package (larger footprint) with 250 mW power rating compared to SOT-523 with 150 mW. PCB layout modification is required. BC847C,235 provides hFE minimum of 420 compared to 110 for BC847AT-TP, representing significantly higher current gain.

Q: What is the significance of packaging codes ",115" and ",135"?

A: The ",115" designation indicates Bulk packaging, while ",135" indicates Tape & Reel (TR) packaging. Both contain identical electronic components with equivalent electrical performance. Packaging selection depends on assembly process requirements and quantity needs. Bulk packaging is typical for lower-volume applications, while Tape & Reel is standard for automated assembly lines.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance status. All parts maintain MSL 1 (Unlimited) moisture sensitivity level, indicating no special moisture handling requirements during storage or assembly.

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