BC817-16 Equivalent & Substitute Parts

Part Overview

The BC817-16 is an NPN bipolar junction transistor (BJT) manufactured by Diotec Semiconductor in SOT-23 surface mount packaging. This device is rated for 45V collector-emitter breakdown voltage, 800mA maximum collector current, and 310mW power dissipation. The BC817-16 is an active product with extensive inventory availability (299,600 pieces in stock). Equivalent and substitute parts are identified based on matching or exceeding electrical performance within the same package class, enabling component selection flexibility for design requirements, supply chain optimization, and manufacturing continuity.

Key Parameters

Parameter	BC817-16 (Main Part)
Manufacturer	Diotec Semiconductor
Transistor Type	NPN
Voltage - Collector Emitter Breakdown (Max)	45 V
Current - Collector (Ic) (Max)	800 mA
Power - Max	310 mW
Frequency - Transition	100 MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 100mA, 1V
Vce Saturation (Max) @ Ib, Ic	700mV @ 50mA, 500mA
Current - Collector Cutoff (Max)	100nA (ICBO)
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the BC817-16 is determined by the following critical parameters:

Mandatory Matching Criteria:

Transistor Type: NPN
Package / Case: TO-236-3, SC-59, SOT-23-3 (surface mount)
Voltage - Collector Emitter Breakdown (Max): 45V or greater
Frequency - Transition: 100MHz or greater
Operating Temperature Range: -55°C to 150°C or greater

Performance Compatibility Criteria:

Current - Collector (Ic) (Max): 500mA or greater (minimum 62.5% of main part rating)
Power - Max: 250mW or greater
DC Current Gain (hFE): 100 or greater at specified test conditions

Substitute parts are grouped into two categories:

Category A - Direct Equivalents (BC817 Series): Parts maintaining the BC817 base product number with identical or superior electrical ratings. These include BC817-16 RFG, BC817-25 RFG, and BC817-40 RFG from Taiwan Semiconductor Corporation. All variants share 45V breakdown voltage, 500mA minimum collector current, and 100MHz transition frequency.

Category B - Cross-Family Substitutes (BCW66 and MMBT2222 Series): Parts from alternative manufacturers (Nexperia, onsemi, Taiwan Semiconductor) that meet or exceed the electrical performance envelope. BCW66 variants (BCW66FVL, BCW66GLT1G, BCW66HR) provide 800mA collector current capability matching the main part. MMBT2222A RFG operates at reduced voltage (40V) and current (600mA) but maintains functional compatibility for applications not requiring full 45V/800mA ratings.

Parameter Comparison

Part Number	Manufacturer	Ic (Max)	Vce Breakdown (Max)	Power (Max)	Frequency (Transition)	hFE (Min) @ Ic, Vce	Vce Sat (Max) @ Ib, Ic	Package	Product Status
BC817-16	Diotec Semiconductor	800 mA	45 V	310 mW	100 MHz	100 @ 100mA, 1V	700mV @ 50mA, 500mA	SOT-23-3	Active
BC817-16 RFG	Taiwan Semiconductor Corporation	500 mA	45 V	300 mW	100 MHz	100 @ 100mA, 1V	700mV @ 50mA, 500mA	SOT-23	Active
BC817-25 RFG	Taiwan Semiconductor Corporation	500 mA	45 V	300 mW	100 MHz	160 @ 100mA, 1V	700mV @ 50mA, 500mA	SOT-23	Active
BC817-40 RFG	Taiwan Semiconductor Corporation	500 mA	45 V	300 mW	100 MHz	250 @ 100mA, 1V	700mV @ 50mA, 500mA	SOT-23	Active
BCW66FVL	Nexperia USA Inc.	800 mA	45 V	250 mW	100 MHz	100 @ 100mA, 1V	450mV @ 50mA, 500mA	TO-236AB	Active
BCW66GLT1G	onsemi	800 mA	45 V	300 mW	100 MHz	160 @ 100mA, 1V	700mV @ 50mA, 500mA	SOT-23-3	Active
BCW66HR	Nexperia USA Inc.	800 mA	45 V	250 mW	100 MHz	250 @ 100mA, 1V	450mV @ 50mA, 500mA	TO-236AB	Active
MMBT2222A RFG	Taiwan Semiconductor Corporation	600 mA	40 V	300 mW	300 MHz	100 @ 150mA, 10V	1V @ 50mA, 500mA	SOT-23	Active

Engineering Selection Recommendations

Full Current Capability Substitutes (800mA Rating):

BCW66GLT1G (onsemi) provides direct electrical equivalence to the BC817-16 with 800mA collector current, 45V breakdown voltage, and 300mW power rating. This device maintains identical saturation voltage characteristics and transition frequency. onsemi qualification includes ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

BCW66FVL and BCW66HR (Nexperia USA Inc.) both support 800mA collector current and 45V breakdown voltage. These automotive-grade devices carry AEC-Q101 qualification and ROHS3 compliance. BCW66FVL exhibits lower saturation voltage (450mV) compared to the main part (700mV), resulting in reduced power dissipation in saturated switching applications. BCW66HR provides higher DC current gain (250 minimum) enabling reduced base drive requirements.

Reduced Current Capability Substitutes (500mA Rating):

BC817-16 RFG, BC817-25 RFG, and BC817-40 RFG (Taiwan Semiconductor Corporation) are direct variants of the BC817 base product. All three maintain 45V breakdown voltage and 100MHz transition frequency. These parts are suitable for applications where collector current does not exceed 500mA. The three variants differ in DC current gain specification: BC817-16 RFG (100 minimum), BC817-25 RFG (160 minimum), and BC817-40 RFG (250 minimum). Selection among these variants depends on base drive availability and circuit design requirements. All three carry ROHS3 compliance and MSL 1 rating.

Reduced Voltage/Current Substitute (40V/600mA Rating):

MMBT2222A RFG (Taiwan Semiconductor Corporation) operates at 40V maximum breakdown voltage and 600mA maximum collector current. This device is suitable only for applications where the 45V/800mA ratings of the main part are not required. The MMBT2222A RFG provides superior transition frequency (300MHz) and is ROHS3 compliant with MSL 1 rating. Saturation voltage is higher (1V) than the main part, resulting in increased power dissipation in saturated switching modes.

Compliance and Certification Status:

All substitute parts listed carry ROHS3 compliance and REACH Unaffected status. Nexperia parts (BCW66FVL, BCW66HR) and onsemi part (BCW66GLT1G) include automotive-grade qualification (AEC-Q101). Taiwan Semiconductor Corporation parts (BC817 variants, MMBT2222A RFG) are industrial-grade devices without automotive qualification.

Frequently Asked Questions (FAQ)

Q: Can BC817-16 RFG be used as a direct replacement for BC817-16?

A: BC817-16 RFG is electrically compatible for applications where collector current does not exceed 500mA. The main difference is reduced maximum collector current (500mA versus 800mA) and slightly lower power rating (300mW versus 310mW). Both devices share identical 45V breakdown voltage, 100MHz transition frequency, and 100 minimum DC current gain. Package compatibility is confirmed (SOT-23-3). Selection depends on circuit current requirements.

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

A: BC817-25 RFG and BC817-40 RFG are identical except for DC current gain specification. BC817-25 RFG specifies 160 minimum hFE at 100mA/1V, while BC817-40 RFG specifies 250 minimum hFE at the same test conditions. Both maintain 500mA collector current, 45V breakdown voltage, and 100MHz transition frequency. Higher current gain in BC817-40 RFG reduces base drive requirements in switching applications. Selection depends on available base current in the circuit design.

Q: Can BCW66GLT1G replace BC817-16 in all applications?

A: BCW66GLT1G is a full electrical equivalent to BC817-16, supporting 800mA collector current, 45V breakdown voltage, and 100MHz transition frequency. Package compatibility is confirmed (SOT-23-3). The primary difference is manufacturer (onsemi versus Diotec Semiconductor). BCW66GLT1G includes automotive-grade qualification (AEC-Q101) and ROHS3 compliance. Substitution is valid for all applications within the electrical rating envelope.

Q: Why does MMBT2222A RFG have different test conditions for DC current gain?

A: MMBT2222A RFG specifies DC current gain at 150mA/10V, whereas BC817-16 specifies it at 100mA/1V. These different test conditions reflect the device design and intended application space. MMBT2222A RFG is optimized for higher frequency operation (300MHz versus 100MHz) and operates at reduced voltage/current ratings (40V/600mA). Direct hFE comparison between devices requires evaluation at identical test conditions. MMBT2222A RFG is suitable only for applications not requiring the full 45V/800mA capability of BC817-16.

Q: What is the significance of saturation voltage differences between BC817-16 and BCW66 variants?

A: BC817-16 specifies 700mV maximum saturation voltage at 50mA base current and 500mA collector current. BCW66FVL and BCW66HR specify 450mV saturation voltage at identical test conditions. Lower saturation voltage reduces power dissipation in saturated switching applications (P = Vce × Ic). For a 500mA collector current, BCW66 variants dissipate approximately 225mW in saturation versus 350mW for BC817-16. This difference is significant in power-sensitive designs but may be negligible in signal-level switching applications.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed carry ROHS3 compliance certification. The main part (BC817-16 from Diotec Semiconductor) does not specify RoHS status. All substitute parts also carry REACH Unaffected status, indicating no REACH Annex XIV substances of very high concern (SVHC) are present.

Q: What packaging differences exist between substitute parts?

A: All substitute parts use surface mount SOT-23 family packaging (TO-236-3, SC-59, SOT-23-3). Nexperia parts (BCW66FVL, BCW66HR) specify TO-236AB package designation, while onsemi (BCW66GLT1G) and Taiwan Semiconductor Corporation parts specify SOT-23-3 or SOT-23. These designations refer to the same physical package with identical pin configuration and footprint. No PCB layout modifications are required when substituting between these parts.

Q: Which substitute part has the highest inventory availability?

A: BCW66GLT1G (onsemi) has the highest inventory availability at 380,300 pieces in stock. BC817-25 RFG (Taiwan Semiconductor Corporation) has 86,300 pieces available. BC817-16 (main part, Diotec Semiconductor) has 299,600 pieces in stock. Inventory levels should be verified at time of procurement, as availability is subject to change.

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