BC817K-25HVL Equivalent & Substitute Parts

Part Overview

The BC817K-25HVL is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., classified as an active product in the Transistors, Bipolar (BJT) category. This surface mount device operates at 45 V collector-emitter breakdown voltage with a maximum collector current of 500 mA and is packaged in TO-236AB (SOT-23-3) format. The part is supplied in Cut Tape (CT) & Digi-Reel® packaging and meets automotive-grade specifications with AEC-Q101 qualification.

Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and operational parameters. Alternative sources and packaging formats are available to support supply chain flexibility, design optimization, and inventory management across manufacturing environments.

Key Parameters

Parameter	BC817K-25HVL Value
Transistor Type	NPN
Current - Collector (Ic) (Max)	500 mA
Voltage - Collector Emitter Breakdown (Max)	45 V
Vce Saturation (Max) @ Ib, Ic	700mV @ 50mA, 500mA
Current - Collector Cutoff (Max)	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	160 @ 100mA, 1V
Power - Max	350 mW
Frequency - Transition	100MHz
Operating Temperature (TJ)	150°C
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the BC817K-25HVL are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalent (Direct Substitution)

Parts meeting all critical electrical parameters including collector current (500 mA), collector-emitter breakdown voltage (45 V), saturation voltage (700mV @ 50mA, 500mA), DC current gain minimum (160 @ 100mA, 1V), transition frequency (100MHz), and maximum power dissipation (350 mW). These parts differ only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel®) and are functionally interchangeable in circuit applications.

Similar Manufacturer Parts (Functional Equivalents)

Parts sharing the same base product number (BC817 or SBC817) and maintaining compatibility across core electrical specifications: collector current (500 mA), collector-emitter breakdown voltage (45 V), saturation voltage (700mV @ 50mA, 500mA), and transition frequency (100MHz). These parts may exhibit variations in DC current gain (hFE) ranges, maximum power dissipation (300 mW to 310 mW), operating temperature ranges, and manufacturer sources. Functional equivalence is established through matching TO-236-3/SOT-23-3 package compatibility and surface mount mounting type.

Key Parameters for Substitution Determination:

Collector current rating (500 mA)
Collector-emitter breakdown voltage (45 V)
Saturation voltage characteristics (700mV @ 50mA, 500mA)
Transition frequency (100MHz)
Surface mount package format (TO-236-3, SOT-23-3)
NPN transistor type classification

Parameter Comparison

Part Number	Manufacturer	Ic (Max)	Vce Breakdown (Max)	Vce Sat (Max)	hFE (Min) @ Ic, Vce	Power (Max)	Freq - Transition	Package	Grade	AEC-Q101
BC817K-25HVL	Nexperia USA Inc.	500 mA	45 V	700mV @ 50mA, 500mA	160 @ 100mA, 1V	350 mW	100MHz	TO-236AB	Automotive	Yes
BC817K-25HR	Nexperia USA Inc.	500 mA	45 V	700mV @ 50mA, 500mA	160 @ 100mA, 1V	350 mW	100MHz	TO-236AB	Automotive	Yes
BC817-16 RFG	Taiwan Semiconductor Corporation	500 mA	45 V	700mV @ 50mA, 500mA	100 @ 100mA, 1V	300 mW	100MHz	SOT-23	Standard	No
BC817-16Q-7-F	Diodes Incorporated	500 mA	45 V	700mV @ 50mA, 500mA	100 @ 100mA, 1V	310 mW	100MHz	SOT-23-3	Automotive	Yes
BC817-25 RFG	Taiwan Semiconductor Corporation	500 mA	45 V	700mV @ 50mA, 500mA	160 @ 100mA, 1V	300 mW	100MHz	SOT-23	Standard	No
BC817-40 RFG	Taiwan Semiconductor Corporation	500 mA	45 V	700mV @ 50mA, 500mA	250 @ 100mA, 1V	300 mW	100MHz	SOT-23	Standard	No
BC817-40LT1G	onsemi	500 mA	45 V	700mV @ 50mA, 500mA	250 @ 100mA, 1V	300 mW	100MHz	SOT-23-3 (TO-236)	Standard	No
BC817-40Q-13-F	Diodes Incorporated	500 mA	45 V	700mV @ 50mA, 500mA	250 @ 100mA, 1V	310 mW	100MHz	SOT-23-3	Automotive	Yes
BC817-40Q-7-F	Diodes Incorporated	500 mA	45 V	700mV @ 50mA, 500mA	250 @ 100mA, 1V	310 mW	100MHz	SOT-23-3	Automotive	Yes
MMBT2222A RFG	Taiwan Semiconductor Corporation	600 mA	40 V	1V @ 50mA, 500mA	100 @ 150mA, 10V	300 mW	300MHz	SOT-23	Standard	No
SBC817-25LT3G	onsemi	500 mA	45 V	700mV @ 50mA, 500mA	160 @ 100mA, 1V	300 mW	100MHz	SOT-23-3 (TO-236)	Automotive	Yes

Engineering Selection Recommendations

Parametric Equivalent Selection

BC817K-25HR is the direct parametric equivalent to BC817K-25HVL, manufactured by the same source (Nexperia USA Inc.) with identical electrical specifications. The only distinction is packaging format: BC817K-25HR is supplied in Tape & Reel (TR) format, while BC817K-25HVL is supplied in Cut Tape (CT) & Digi-Reel® format. Both parts maintain automotive-grade classification and AEC-Q101 qualification. Selection between these two parts depends on procurement and assembly line requirements for tape format compatibility.

Automotive-Grade Functional Equivalents

For applications requiring automotive-grade qualification and AEC-Q101 compliance, the following parts are suitable:

BC817-16Q-7-F and BC817-16Q-13-F (Diodes Incorporated) maintain 45 V breakdown voltage, 500 mA collector current, and 100MHz transition frequency with AEC-Q101 qualification. These parts feature 310 mW maximum power dissipation and hFE minimum of 100 @ 100mA, 1V. Operating temperature range extends to -65°C.

BC817-40Q-7-F and BC817-40Q-13-F (Diodes Incorporated) provide identical voltage and current ratings with higher DC current gain (hFE minimum 250 @ 100mA, 1V) and maintain AEC-Q101 automotive qualification. Maximum power dissipation is 310 mW with -65°C to 150°C operating temperature range.

SBC817-25LT3G (onsemi) is an automotive-grade part with AEC-Q101 qualification, matching the DC current gain specification (hFE minimum 160 @ 100mA, 1V) of the original BC817K-25HVL. Operating temperature range is -65°C to 150°C with 300 mW maximum power dissipation.

Standard-Grade Functional Equivalents

BC817-25 RFG (Taiwan Semiconductor Corporation) matches the DC current gain specification (hFE minimum 160 @ 100mA, 1V) and maintains 45 V breakdown voltage with 500 mA collector current. This part is supplied in Tape & Reel format without automotive-grade certification.

BC817-40LT1G (onsemi) provides higher DC current gain (hFE minimum 250 @ 100mA, 1V) with standard-grade classification and extended operating temperature range (-65°C to 150°C).

Non-Recommended Substitution

MMBT2222A RFG exhibits parameter deviations that preclude direct substitution: 40 V collector-emitter breakdown voltage (versus 45 V requirement), 600 mA collector current rating, 1V saturation voltage @ 50mA, 500mA, and 300MHz transition frequency. These differences represent functional incompatibility with BC817K-25HVL circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can BC817K-25HR be used as a direct replacement for BC817K-25HVL?

A: Yes. BC817K-25HR is a parametric equivalent with identical electrical specifications, automotive-grade classification, and AEC-Q101 qualification. The difference is packaging format: BC817K-25HR uses Tape & Reel (TR) while BC817K-25HVL uses Cut Tape (CT) & Digi-Reel®. Selection depends on assembly line tape format compatibility.

Q: What is the difference between BC817-16 and BC817-25 and BC817-40 variants?

A: The numeric suffix indicates DC current gain (hFE) classification. BC817-16 specifies hFE minimum of 100 @ 100mA, 1V. BC817-25 specifies hFE minimum of 160 @ 100mA, 1V. BC817-40 specifies hFE minimum of 250 @ 100mA, 1V. All three maintain identical voltage (45 V), current (500 mA), and frequency (100MHz) ratings.

Q: Are all substitute parts automotive-qualified?

A: No. Only BC817K-25HR, BC817-16Q-7-F, BC817-16Q-13-F, BC817-40Q-7-F, BC817-40Q-13-F, and SBC817-25LT3G carry AEC-Q101 automotive qualification. BC817-16 RFG, BC817-25 RFG, BC817-40 RFG, BC817-40LT1G, and MMBT2222A RFG are standard-grade parts without automotive certification.

Q: What is the significance of the -K- designation in BC817K-25HVL?

A: The -K- designation indicates the specific variant within the BC817 product family. BC817K-25HVL specifies the 25 hFE grade (160 minimum @ 100mA, 1V) with 45 V rating in Cut Tape & Digi-Reel® packaging.

Q: Can BC817-40Q-7-F replace BC817K-25HVL in all applications?

A: BC817-40Q-7-F is functionally compatible for applications where higher DC current gain (hFE minimum 250 versus 160) is acceptable. Both parts maintain 45 V breakdown voltage, 500 mA collector current, 100MHz transition frequency, and AEC-Q101 automotive qualification. Circuit performance may differ in applications sensitive to current gain specifications.

Q: Why is MMBT2222A RFG not recommended as a substitute?

A: MMBT2222A RFG exhibits multiple parameter deviations: 40 V collector-emitter breakdown voltage (below the 45 V requirement), 600 mA collector current (exceeding specification), 1V saturation voltage (versus 700mV), and 300MHz transition frequency (versus 100MHz). These differences represent functional incompatibility with BC817K-25HVL circuit design requirements.

Q: What is the difference between Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) packaging?

A: Cut Tape (CT) & Digi-Reel® is supplied in individual cut tape segments on reels suitable for manual or semi-automated assembly. Tape & Reel (TR) is supplied in continuous tape format optimized for automated pick-and-place assembly equipment. Both formats contain the same component; selection depends on assembly process requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance status, matching the environmental compliance profile of BC817K-25HVL.

Q: What is the operating temperature range difference between variants?

A: BC817K-25HVL specifies maximum operating temperature of 150°C (TJ). Some substitute parts extend the lower temperature limit to -65°C (versus unspecified lower limit in the original). BC817-16 RFG and BC817-25 RFG specify -55°C to 150°C range. This difference is relevant for applications operating in extreme low-temperature environments.

Q: Can parts with 300 mW power rating replace the 350 mW BC817K-25HVL?

A: Parts with 300 mW maximum power dissipation (BC817-16 RFG, BC817-25 RFG, BC817-40 RFG, BC817-40LT1G, SBC817-25LT3G) are functionally compatible if circuit power dissipation remains below 300 mW. Applications requiring the full 350 mW capability should use BC817K-25HVL or BC817K-25HR.

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