BCW29,235 Equivalent & Substitute Parts

Part Overview

The BCW29,235 is an active PNP bipolar junction transistor manufactured by Nexperia USA Inc., designed for surface mount applications in the TO-236AB package. This component operates at a maximum collector current of 100 mA, collector-emitter breakdown voltage of 32 V, and maximum power dissipation of 250 mW. The transistor is qualified to AEC-Q101 automotive standards and carries ROHS3 compliance.

Equivalent and substitute parts are identified based on matching or exceeding the electrical and mechanical specifications of the BCW29,235. Substitution becomes necessary when the primary part reaches end-of-life status, experiences supply constraints, or when design requirements permit operation with enhanced performance parameters.

Key Parameters

Parameter	BCW29,235 Specification
Transistor Type	PNP
Current - Collector (Ic) (Max)	100 mA
Voltage - Collector Emitter Breakdown (Max)	32 V
Vce Saturation (Max) @ Ib, Ic	150 mV @ 2.5 mA, 50 mA
Current - Collector Cutoff (Max)	100 nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	120 @ 2 mA, 5 V
Power - Max	250 mW
Frequency - Transition	100 MHz
Operating Temperature (TJ)	150°C
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the BCW29,235 are classified into two categories based on electrical parameter alignment:

Parametric Equivalent: Parts that match all critical electrical specifications within the same package form factor. The BCW29,215 from Nexperia USA Inc. is a parametric equivalent, sharing identical maximum ratings for collector current (100 mA), collector-emitter breakdown voltage (32 V), saturation voltage, cutoff current, DC current gain, power dissipation (250 mW), transition frequency (100 MHz), and operating temperature (150°C). Both parts are housed in the TO-236AB package and maintain AEC-Q101 automotive qualification.

Similar Parts: Components that operate within compatible electrical ranges but may exceed one or more performance parameters. These parts maintain the same transistor type (PNP), surface mount mounting technology, and SOT-23-3 package compatibility. Substitution with similar parts is permissible when the application does not require the exact electrical specifications of the primary part and can tolerate enhanced performance characteristics such as higher collector current, voltage rating, power dissipation, or transition frequency.

Key parameters determining substitution eligibility:

Transistor Type: PNP (mandatory match)
Collector Current (Ic): Must equal or exceed 100 mA
Collector-Emitter Breakdown Voltage (Vce): Must equal or exceed 32 V
Package / Case: TO-236-3, SC-59, or SOT-23-3 (mechanical compatibility)
Mounting Type: Surface Mount (mandatory match)
RoHS Status: ROHS3 Compliant (mandatory match)

Parameter Comparison

Part Number	Manufacturer	Ic (Max)	Vce Breakdown (Max)	Power (Max)	Frequency (Transition)	Package	Grade	Qualification	Status
BCW29,235	Nexperia USA Inc.	100 mA	32 V	250 mW	100 MHz	TO-236AB	Automotive	AEC-Q101	Active
BCW29,215	Nexperia USA Inc.	100 mA	32 V	250 mW	100 MHz	TO-236AB	Automotive	AEC-Q101	Active
2SA1182-Y,LF	Toshiba Semiconductor and Storage	500 mA	30 V	150 mW	200 MHz	S-Mini	—	—	Active
2SB1695KT146	Rohm Semiconductor	1.5 A	30 V	200 mW	280 MHz	SMT3	—	—	Active
2SB1695TL	Rohm Semiconductor	1.5 A	30 V	500 mW	280 MHz	TSMT3	—	—	Active
2SB1706TL	Rohm Semiconductor	2 A	30 V	500 mW	280 MHz	TSMT3	—	—	Active
2SB1710TL	Rohm Semiconductor	1 A	30 V	500 mW	320 MHz	TSMT3	—	—	Active
2STR2230	STMicroelectronics	1.5 A	30 V	500 mW	100 MHz	SOT-23-3	—	—	Active
BC858A RFG	Taiwan Semiconductor Corporation	100 mA	30 V	200 mW	100 MHz	SOT-23	—	—	Active
BC858ALT1G	onsemi	100 mA	30 V	300 mW	100 MHz	SOT-23-3	—	—	Active
BC858B RFG	Taiwan Semiconductor Corporation	100 mA	30 V	200 mW	100 MHz	SOT-23	—	—	Active

Engineering Selection Recommendations

Parametric Equivalent Selection:

The BCW29,215 is the direct parametric equivalent to the BCW29,235. Both parts are manufactured by Nexperia USA Inc., maintain identical electrical specifications across all critical parameters, and carry AEC-Q101 automotive qualification with ROHS3 compliance. Selection of BCW29,215 requires no circuit redesign or performance validation. The BCW29,215 offers higher inventory availability (4,133 pieces) compared to the BCW29,235 (681 pieces), making it the preferred choice for supply continuity.

Similar Part Selection:

Similar parts are suitable for applications where the BCW29,235 specifications represent the minimum acceptable performance threshold. Selection criteria depend on application requirements:

BC858ALT1G (onsemi): Matches collector current (100 mA) and transition frequency (100 MHz) of the primary part while offering enhanced power dissipation (300 mW versus 250 mW) and improved collector cutoff current specification (15 nA versus 100 nA). Package compatibility is confirmed as SOT-23-3 (TO-236). This part is suitable for direct substitution in applications requiring identical electrical performance with margin.
2SB1710TL (Rohm Semiconductor): Exceeds collector current specification (1 A versus 100 mA) and offers enhanced transition frequency (320 MHz versus 100 MHz) with increased power dissipation (500 mW). Package form factor differs (TSMT3 versus TO-236AB), requiring mechanical redesign. Selection is appropriate for applications requiring higher current handling or frequency response.
2STR2230 (STMicroelectronics): Provides 1.5 A collector current capacity and 500 mW power dissipation in SOT-23-3 package, maintaining 100 MHz transition frequency. This part accommodates higher current applications while preserving package compatibility.

All substitute parts maintain active product status and ROHS3 compliance. Parts without explicit automotive grade designation (2SA1182-Y,LF, 2SB1695 series, 2STR2230, BC858 series) are suitable for non-automotive applications or applications where automotive qualification is not contractually mandated.

Frequently Asked Questions (FAQ)

Q: Can BCW29,215 be used as a direct replacement for BCW29,235?

A: Yes. BCW29,215 is a parametric equivalent with identical electrical specifications, package form factor (TO-236AB), and AEC-Q101 automotive qualification. No circuit modification is required.

Q: What is the primary difference between parametric equivalents and similar parts?

A: Parametric equivalents match all critical electrical specifications of the primary part. Similar parts exceed one or more performance parameters (collector current, voltage rating, power dissipation, or frequency response) while maintaining the same transistor type and surface mount technology. Similar parts are suitable when application requirements do not mandate exact specification matching.

Q: Are BC858 series transistors compatible with BCW29,235?

A: BC858A RFG, BC858ALT1G, and BC858B RFG are compatible substitutes for applications operating at or below 100 mA collector current and 30 V collector-emitter breakdown voltage. All three parts maintain 100 MHz transition frequency and SOT-23-3 package compatibility. BC858ALT1G offers enhanced power dissipation (300 mW) compared to the primary part (250 mW).

Q: Can higher current rated parts such as 2SB1710TL replace BCW29,235?

A: Yes, for applications where the circuit design accommodates the different package form factor (TSMT3 versus TO-236AB). The 2SB1710TL provides 1 A collector current capacity, 30 V breakdown voltage, and 320 MHz transition frequency. Mechanical redesign is required due to package differences.

Q: What packaging considerations apply when selecting substitute parts?

A: The BCW29,235 is housed in TO-236AB package, which is mechanically equivalent to SC-59 and SOT-23-3 designations. Substitute parts designated as SOT-23-3 or TO-236-3 are directly compatible without PCB redesign. Parts in alternative packages (S-Mini, SMT3, TSMT3) require mechanical redesign and PCB layout modification.

Q: Are all listed substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance status, matching the environmental compliance requirement of the BCW29,235.

Q: Which substitute part offers the best inventory availability?

A: The 2SB1695KT146 (Rohm Semiconductor) offers the highest inventory availability at 267,100 pieces. The 2STR2230 (STMicroelectronics) provides 209,400 pieces. For direct parametric equivalence, BCW29,215 (Nexperia USA Inc.) offers 4,133 pieces.

Q: Can BCW29,235 be used in applications requiring automotive qualification?

A: Yes. The BCW29,235 carries AEC-Q101 automotive qualification and is suitable for automotive applications. When substituting with similar parts lacking explicit automotive grade designation, compliance verification with application-specific automotive standards is required.

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