BC858CE6433HTMA1 Equivalent & Substitute Parts

Part Overview

The BC858CE6433HTMA1 is a PNP bipolar junction transistor manufactured by Infineon Technologies, designed for general-purpose switching and amplification applications. This device operates at 30 V collector-emitter breakdown voltage with a maximum collector current of 100 mA and transition frequency of 250 MHz. The part is packaged in SOT-23-3 (TO-236-3) surface mount configuration with 330 mW power dissipation capability.

The BC858CE6433HTMA1 carries a Last Time Buy product status, indicating discontinued production. Equivalent and substitute parts are necessary to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector Current (Ic) Maximum	100	mA
Collector-Emitter Breakdown Voltage (Vceo)	30	V
Vce Saturation @ Ib, Ic	650 mV @ 5 mA, 100 mA	—
Collector Cutoff Current (Icbo)	15	nA
DC Current Gain (hFE) @ Ic, Vce	420 @ 2 mA, 5 V	—
Power Dissipation Maximum	330	mW
Transition Frequency (fT)	250	MHz
Operating Temperature Maximum	150	°C
Package Type	SOT-23-3 (TO-236-3, SC-59)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BC858CE6433HTMA1 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Transistor Type: PNP (mandatory)
Collector Current (Ic) Maximum: 100 mA (mandatory)
Collector-Emitter Breakdown Voltage (Vceo): 30 V (mandatory)
Vce Saturation: 650 mV @ 5 mA, 100 mA (mandatory)
DC Current Gain (hFE): 420 @ 2 mA, 5 V (mandatory)
Package Type: SOT-23-3 / TO-236-3 (mandatory for PCB compatibility)
Mounting Type: Surface Mount (mandatory)
RoHS Status: ROHS3 Compliant (mandatory)

Secondary Compatibility Parameters:

Power Dissipation: 300 mW minimum acceptable (main part: 330 mW)
Transition Frequency: 100 MHz minimum acceptable (main part: 250 MHz)
Operating Temperature: -55°C to 150°C acceptable range
Moisture Sensitivity Level: 1 (Unlimited) preferred

Substitute parts are grouped into two categories:

Category A - Parametric Equivalents (Infineon Technologies): Parts BC858CE6327HTSA1 and BC859CE6327HTSA1 maintain identical electrical specifications and differ only in packaging format (Tape & Reel vs. Cut Tape) or base product designation. These provide direct functional replacement.

Category B - Direct Manufacturer Equivalents (Active Status): Parts from Diodes Incorporated (BC858C-7-F), onsemi (BC858CLT1G, NSVBC858CLT1G), and Nexperia USA Inc. (BC859C,215) meet all mandatory electrical and mechanical parameters while offering active product status and improved long-term availability.

Category C - Higher Current Capability (Rohm Semiconductor): Parts 2SB1695KT146, 2SB1695TL, 2SB1706TL, and 2SB1708TL exceed the 100 mA collector current specification (1.5 A to 3 A range) and are suitable only for applications where higher current handling is acceptable and beneficial.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Ic (Max) mA	Vceo (V)	Vce Sat (mV)	hFE @ Ic, Vce	Power (mW)	fT (MHz)	Package	Status
BC858CE6433HTMA1	Infineon	100	30	650 @ 5mA, 100mA	420 @ 2mA, 5V	330	250	SOT-23-3	Last Time Buy
BC858CE6327HTSA1	Infineon	100	30	650 @ 5mA, 100mA	420 @ 2mA, 5V	330	250	SOT-23-3	Last Time Buy
BC859CE6327HTSA1	Infineon	100	30	650 @ 5mA, 100mA	420 @ 2mA, 5V	330	250	SOT-23-3	Last Time Buy
BC858C-7-F	Diodes Incorporated	100	30	650 @ 5mA, 100mA	420 @ 2mA, 5V	300	200	SOT-23-3	Active
BC858CLT1G	onsemi	100	30	650 @ 5mA, 100mA	420 @ 2mA, 5V	300	100	SOT-23-3	Active
NSVBC858CLT1G	onsemi	100	30	650 @ 5mA, 100mA	420 @ 2mA, 5V	300	100	SOT-23-3	Active
BC859C,215	Nexperia USA Inc.	100	30	650 @ 5mA, 100mA	420 @ 2mA, 5V	250	100	SOT-23-3	Active
2SB1695KT146	Rohm Semiconductor	1500	30	370 @ 50mA, 1A	270 @ 100mA, 2V	200	280	SOT-23-3	Active
2SB1695TL	Rohm Semiconductor	1500	30	370 @ 50mA, 1A	270 @ 100mA, 2V	500	280	SC-96	Active
2SB1706TL	Rohm Semiconductor	2000	30	370 @ 75mA, 1.5A	270 @ 200mA, 2V	500	280	SC-96	Active
2SB1708TL	Rohm Semiconductor	3000	30	250 @ 30mA, 1.5A	270 @ 200mA, 2V	500	200	SC-96	Active

Engineering Selection Recommendations

For Direct Replacement (100 mA Collector Current Applications):

Select BC858C-7-F (Diodes Incorporated) or BC858CLT1G (onsemi) as primary substitutes. Both parts maintain identical collector current, breakdown voltage, saturation voltage, and current gain specifications. These manufacturers offer Active product status, ensuring long-term availability and supply chain stability. BC858C-7-F provides 200 MHz transition frequency and 300 mW power dissipation; BC858CLT1G provides 100 MHz transition frequency and 300 mW power dissipation. Both are ROHS3 compliant with MSL 1 rating.

NSVBC858CLT1G (onsemi) is functionally equivalent to BC858CLT1G and provides identical electrical performance with Active status.

BC859C,215 (Nexperia USA Inc.) qualifies as a direct substitute with identical electrical specifications. This part carries AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components. Power dissipation is 250 mW, which remains within acceptable limits for 100 mA applications.

For Parametric Equivalents (Infineon Continuity):

BC858CE6327HTSA1 and BC859CE6327HTSA1 (Infineon Technologies) provide identical electrical specifications to the main part. These are suitable where Infineon product continuity is required. Both carry Last Time Buy status; inventory availability should be verified before design commitment.

For Higher Current Applications (1.5 A to 3 A):

The Rohm Semiconductor series (2SB1695KT146, 2SB1695TL, 2SB1706TL, 2SB1708TL) is not recommended as direct substitutes for 100 mA applications due to different electrical characteristics (lower hFE, different Vce saturation curves). These parts are suitable only for applications requiring collector currents exceeding 100 mA. Package differences (SC-96 for 2SB1695TL, 2SB1706TL, 2SB1708TL) require PCB layout modification.

Compliance Verification:

All recommended substitutes maintain ROHS3 compliance and MSL 1 rating. Verify REACH and ECCN compliance status with component suppliers for specific end-use applications.

Frequently Asked Questions (FAQ)

Q1: Can BC858CLT1G replace BC858CE6433HTMA1 in existing designs?

A: Yes. BC858CLT1G meets all mandatory electrical parameters: 100 mA collector current, 30 V breakdown voltage, 650 mV saturation voltage, and 420 hFE at specified conditions. The 100 MHz transition frequency (versus 250 MHz in the original) is acceptable for applications not requiring high-frequency switching. Both use identical SOT-23-3 packaging. onsemi provides Active product status, ensuring continued availability.

Q2: What is the difference between BC858CE6327HTSA1 and BC858CE6433HTMA1?

A: Both parts are Infineon Technologies products with identical electrical specifications. The difference is in the packaging format: BC858CE6327HTSA1 is supplied in Tape & Reel format with higher inventory availability (102,300 pcs), while BC858CE6433HTMA1 is the original part number. Both carry Last Time Buy status. Electrical performance is identical.

Q3: Why are Rohm 2SB1695 and 2SB1706 series not recommended as direct substitutes?

A: These parts exceed the 100 mA collector current specification (1.5 A to 3 A range) and exhibit different electrical characteristics. DC current gain (hFE) is 270 at 100 mA, 2 V versus 420 at 2 mA, 5 V in the BC858. Vce saturation characteristics differ significantly. These parts are suitable only for applications requiring higher current handling. Additionally, 2SB1695TL, 2SB1706TL, and 2SB1708TL use SC-96 package instead of SOT-23-3, requiring PCB redesign.

Q4: Is BC859C,215 suitable for automotive applications?

A: Yes. BC859C,215 (Nexperia USA Inc.) carries AEC-Q101 automotive qualification and is suitable for automotive-grade designs. It meets all electrical specifications of the BC858CE6433HTMA1 and provides Active product status. Power dissipation is 250 mW, which is acceptable for 100 mA applications.

Q5: What is the impact of lower transition frequency in substitute parts?

A: BC858CLT1G and NSVBC858CLT1G provide 100 MHz transition frequency versus 250 MHz in the original BC858CE6433HTMA1. This reduction is acceptable for general-purpose switching and low-frequency amplification applications. For high-frequency switching applications (above 100 MHz), BC858C-7-F (200 MHz) or the original Infineon parts (250 MHz) are preferred.

Q6: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts listed in this document are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Verify specific compliance documentation with component suppliers for applications requiring formal compliance certification.

Q7: Can I use BC858C-7-F as a drop-in replacement without PCB modification?

A: Yes. BC858C-7-F uses identical SOT-23-3 packaging and pin configuration. No PCB layout modification is required. Electrical specifications are compatible with the original BC858CE6433HTMA1 for 100 mA applications.

Q8: What is the difference between Cut Tape and Tape & Reel packaging?

A: Both formats contain identical components. Tape & Reel (TR) packaging is supplied on continuous tape for automated assembly equipment. Cut Tape (CT) is supplied in smaller quantities on individual tape segments. Selection depends on production volume and assembly equipment capability. Electrical performance is identical.

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