BC817-40/SNR Equivalent & Substitute Parts

Part Overview

The BC817-40/SNR is an NPN bipolar junction transistor manufactured by Nexperia USA Inc. in the TO-236AB surface mount package. This device is classified as obsolete, though functionally equivalent active alternatives are available. The BC817-40/SNR is rated for 45 V collector-emitter breakdown voltage, 500 mA maximum collector current, and 250 mW power dissipation with a transition frequency of 100 MHz. Due to its obsolete status, direct substitution with active product variants is necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Collector-Emitter Breakdown Voltage (Max)	45	V
Collector Current (Max)	500	mA
Vce Saturation (Max)	700 mV @ 50 mA, 500 mA	—
Collector Cutoff Current (Max)	100	nA
DC Current Gain (hFE Min)	250 @ 100 mA, 1 V	—
Power Dissipation (Max)	250	mW
Transition Frequency	100	MHz
Operating Temperature (Max)	150	°C
Package Type	TO-236-3 / SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BC817-40/SNR is determined by electrical and mechanical parameter equivalence. All substitute parts must maintain identical or superior ratings across the following critical parameters:

Transistor type: NPN
Collector-emitter breakdown voltage: 45 V minimum
Maximum collector current: 500 mA minimum
Vce saturation characteristics: 700 mV @ 50 mA, 500 mA
DC current gain (hFE): 250 minimum @ 100 mA, 1 V
Power dissipation: 250 mW minimum
Transition frequency: 100 MHz minimum
Package compatibility: TO-236-3 / SOT-23-3 surface mount
RoHS3 compliance and MSL Level 1

Substitute parts are grouped into two categories: direct manufacturer equivalents from Nexperia USA Inc. with active product status, and parametric equivalents from alternative manufacturers (onsemi, Good-Ark Semiconductor) that meet all electrical specifications. Packaging variants (Cut Tape, Tape & Reel, Digi-Reel) do not affect electrical substitutability but influence procurement and handling requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Ic (Max) mA	Vce(br) V	hFE (Min)	Power mW	Freq MHz	Package	Qualification
BC817-40/SNR	Nexperia USA Inc.	Obsolete	500	45	250	250	100	TO-236AB	—
BC817-40,215	Nexperia USA Inc.	Active	500	45	250	250	100	TO-236AB	—
BC817-40,235	Nexperia USA Inc.	Active	500	45	250	250	100	TO-236AB	AEC-Q101
BC817-40-QR	Nexperia USA Inc.	Active	500	45	250	250	100	TO-236AB	AEC-Q101
BC817-40-QVL	Nexperia USA Inc.	Active	500	45	250	250	100	TO-236AB	AEC-Q101
BC817K-40R	Nexperia USA Inc.	Active	500	45	250	250	100	TO-236AB	AEC-Q100
BC817K-40VL	Nexperia USA Inc.	Active	500	45	250	250	100	TO-236AB	AEC-Q100
SBC817-40LT1G	onsemi	Active	500	45	250	300	100	SOT-23-3	AEC-Q101
GSBC817-40	Good-Ark Semiconductor	Active	500	45	250	250	100	SOT-23-3	—

Engineering Selection Recommendations

Primary Recommendation: BC817-40,215

BC817-40,215 is the direct Nexperia USA Inc. equivalent with active product status. This part maintains identical electrical specifications to the obsolete BC817-40/SNR and is available in Cut Tape and Digi-Reel packaging formats. Selection of this part ensures continuity with the original design without requiring circuit modifications.

Automotive-Grade Alternatives: BC817-40,235, BC817-40-QR, BC817-40-QVL

These Nexperia parts carry AEC-Q101 automotive qualification and are suitable for applications requiring automotive-grade components. BC817-40,235 offers the highest inventory availability (514,704 pieces). BC817-40-QR and BC817-40-QVL are supplied in Tape & Reel format and carry identical electrical specifications.

Automotive-Grade Alternatives: BC817K-40R, BC817K-40VL

These Nexperia parts carry AEC-Q100 automotive qualification, a higher qualification standard than AEC-Q101. Both maintain identical electrical parameters and are available in Tape & Reel packaging.

Cross-Manufacturer Alternative: SBC817-40LT1G

The onsemi SBC817-40LT1G is a parametric equivalent with AEC-Q101 automotive qualification. This part offers 300 mW power dissipation, exceeding the 250 mW specification of the BC817-40/SNR. Operating temperature range extends to −65°C. Selection of this part is appropriate when cross-manufacturer sourcing is required or when the enhanced power rating provides design margin.

Cross-Manufacturer Alternative: GSBC817-40

The Good-Ark Semiconductor GSBC817-40 meets all electrical specifications and is available in Tape & Reel packaging. This part does not carry automotive qualification and is suitable for non-automotive applications requiring alternative sourcing.

Frequently Asked Questions (FAQ)

Q: Can BC817-40,215 be used as a direct replacement for BC817-40/SNR?

A: Yes. BC817-40,215 is electrically and mechanically identical to BC817-40/SNR. Both parts share the same collector current rating (500 mA), breakdown voltage (45 V), DC current gain (250 minimum), power dissipation (250 mW), and transition frequency (100 MHz). The primary difference is product status: BC817-40/SNR is obsolete while BC817-40,215 is active.

Q: What is the difference between BC817-40,215 and BC817-40,235?

A: Both parts are electrically identical. BC817-40,235 carries AEC-Q101 automotive qualification, while BC817-40,215 does not. BC817-40,235 is available in significantly higher inventory (514,704 pieces versus 3,190 pieces). Selection depends on whether automotive qualification is required for the application.

Q: Are BC817K-40R and BC817K-40VL suitable replacements?

A: Yes. These parts maintain identical electrical specifications to BC817-40/SNR and carry AEC-Q100 automotive qualification, which is a higher qualification standard than AEC-Q101. The "K" designation and qualification level are the primary differences from other BC817-40 variants.

Q: Can SBC817-40LT1G from onsemi replace the BC817-40/SNR?

A: Yes. SBC817-40LT1G meets all electrical specifications of BC817-40/SNR. The onsemi part offers 300 mW power dissipation compared to 250 mW, providing additional design margin. Operating temperature range is −65°C to 150°C. This part carries AEC-Q101 automotive qualification and is suitable for cross-manufacturer substitution.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) and Digi-Reel packaging are used for lower-volume orders and manual assembly processes. Tape & Reel (TR) packaging is used for high-volume automated assembly. Electrical specifications are identical across packaging formats. Selection depends on production volume and assembly equipment compatibility.

Q: Is GSBC817-40 from Good-Ark Semiconductor a suitable replacement?

A: Yes, for non-automotive applications. GSBC817-40 meets all electrical specifications of BC817-40/SNR. This part does not carry automotive qualification (AEC-Q100 or AEC-Q101). Selection is appropriate when alternative sourcing is required and automotive qualification is not a design requirement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance status, matching the BC817-40/SNR specification. All parts also maintain Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling requirements during storage or assembly.

Q: Can I use these parts interchangeably in my circuit?

A: Yes, within the constraints of your application requirements. All substitute parts maintain identical electrical specifications for collector current, breakdown voltage, current gain, and frequency response. If your application requires automotive qualification, select parts carrying AEC-Q100 or AEC-Q101 certification. If your application does not require automotive qualification, all listed parts are suitable.

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