BC817-40 Equivalent & Substitute Parts Reference

Part Overview

The BC817-40 from EVVO Semi is an active NPN bipolar junction transistor (BJT) designed for general purpose surface mount applications. It offers a 45 V maximum collector-emitter breakdown voltage, 500 mA maximum collector current, 300 mW power dissipation, and is packaged in the SOT-23 (TO-236-3, SC-59) package. Substitution may be necessary due to sourcing, supply chain constraints, or requirements for specific compliance or automotive-grade certification. Selecting functional equivalents ensures system integrity when replacing the original part.

Key Parameters

Parameter	Value
Transistor Type	NPN
Voltage - Collector Emitter Breakdown (Max)	45 V
Current - Collector (Ic) (Max)	500 mA
Vce Saturation (Max) @ Ib, Ic	700mV @ 50mA, 500mA
Current - Collector Cutoff (Max)	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	250 @ 100mA, 1V
Power - Max	300 mW
Frequency - Transition	100MHz
Operating Temperature (TJ)	Up to 150°C
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Supplier Device Package	SOT-23
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the BC817-40 are selected based strictly on matching critical parameters: transistor type (NPN), maximum collector-emitter breakdown voltage (45 V), maximum collector current (500 mA), Vce saturation (700 mV at specified test conditions), collector cutoff current (100 nA ICBO), minimum DC current gain (hFE = 250 at 100 mA, 1 V), power dissipation (300 mW), transition frequency (100 MHz), maximum operating junction temperature (150°C), package equivalency (TO-236-3, SC-59, SOT-23-3), surface mount type, RoHS compliance, and MSL rating. Substitutes listed match all specified electrical, mechanical, and compliance parameters.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Transistor Type	V_CE(max)	I_C(max)	V_CE(sat)@ Ib, Ic	I_CBO (Cutoff)	hFE (min)@ Ic, Vce	P_max	fT	Operating Temp (TJ)	Mounting Type	Package / Case	Supplier Device Package	RoHS Status	MSL	Product Status
BC817-40	EVVO Semi	NPN	45 V	500 mA	700 mV @ 50mA, 500mA	100 nA	250 @ 100mA, 1V	300 mW	100 MHz	150°C	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23	ROHS3 Compliant	1 (Unlimited)	Active
ABC817-40-HF	Comchip Technology	NPN	45 V	500 mA	700 mV @ 50mA, 500mA	100 nA	250 @ 100mA, 1V	300 mW	100 MHz	-55°C ~ 150°C	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3	ROHS3 Compliant	1 (Unlimited)	Active
BC817-40 RFG	Taiwan Semiconductor Corporation	NPN	45 V	500 mA	700 mV @ 50mA, 500mA	100 nA	250 @ 100mA, 1V	300 mW	100 MHz	-55°C ~ 150°C	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23	ROHS3 Compliant	1 (Unlimited)	Active
BC817-40LT1G	onsemi	NPN	45 V	500 mA	700 mV @ 50mA, 500mA	100 nA	250 @ 100mA, 1V	300 mW	100 MHz	-65°C ~ 150°C	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3 (TO-236)	ROHS3 Compliant	1 (Unlimited)	Active
BC817-40LT3G	onsemi	NPN	45 V	500 mA	700 mV @ 50mA, 500mA	100 nA	250 @ 100mA, 1V	300 mW	100 MHz	-65°C ~ 150°C	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3 (TO-236)	ROHS3 Compliant	1 (Unlimited)	Active
SBC817-40LT1G	onsemi	NPN	45 V	500 mA	700 mV @ 50mA, 500mA	100 nA	250 @ 100mA, 1V	300 mW	100 MHz	-65°C ~ 150°C	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3 (TO-236)	ROHS3 Compliant	1 (Unlimited)	Active
SBC817-40LT3G	onsemi	NPN	45 V	500 mA	700 mV @ 50mA, 500mA	100 nA	250 @ 100mA, 1V	300 mW	100 MHz	-65°C ~ 150°C	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3 (TO-236)	ROHS3 Compliant	1 (Unlimited)	Active

Engineering Selection Recommendations

All substitute parts listed are active, ROHS3 compliant, and rated as Moisture Sensitivity Level 1 (Unlimited). Automotive grade and AEC-Q101 qualified options are available within the substitute group as indicated in the detailed descriptions. Product selection can be made based on product status, compliance, inventory, and certification requirements as specified in the parameters above.

Frequently Asked Questions (FAQ)

Q: What key parameters must match for a BC817-40 replacement in a design?
A: Transistor type (NPN), maximum collector-emitter breakdown voltage (45 V), maximum collector current (500 mA), Vce saturation (700 mV at specified biases), collector cutoff current (100 nA), minimum DC current gain (hFE, 250 at 100 mA/1 V), maximum power dissipation (300 mW), transition frequency (100 MHz), operating temperature up to 150°C, surface mount package (TO-236-3, SC-59, SOT-23-3), RoHS compliance, and MSL rating.

Q: Are all listed substitutes for BC817-40 electrically identical?
A: All substitutes provided match the primary electrical and mechanical parameters of the BC817-40 as listed in the comparison and key parameters tables.

Q: Do package differences affect interchangeability?
A: All substitutes are specified for surface mount and are available in equivalent packages: TO-236-3, SC-59, and SOT-23-3, ensuring compatibility.

Q: Which substitutes offer automotive or AEC-Q101 qualification?
A: ABC817-40-HF, SBC817-40LT1G, and SBC817-40LT3G parts explicitly indicate grade automotive and AEC-Q101 qualification.

Q: Is there any difference in environmental compliance among the substitute parts?
A: All listed substitutes are ROHS3 compliant and have an MSL rating of 1 (Unlimited) as specified in their parametric data.

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