BCX56,135 Equivalent & Substitute Parts

Part Overview

The BCX56,135 is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for general-purpose switching and amplification applications. This Surface Mount device in SOT-89 packaging operates at maximum ratings of 80 V collector-emitter breakdown voltage and 1 A collector current, with a maximum power dissipation of 1.25 W and transition frequency of 180 MHz. The part is classified as Active product status and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching or exceeding critical electrical parameters while maintaining compatible mechanical packaging and thermal characteristics.

Key Parameters

Parameter	BCX56,135 Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) Max	1	A
Voltage - Collector Emitter Breakdown (Max)	80	V
Vce Saturation (Max) @ Ib, Ic	500 mV @ 50 mA, 500 mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) Min @ Ic, Vce	63 @ 150 mA, 2 V	—
Power - Max	1.25	W
Frequency - Transition	180	MHz
Operating Temperature (TJ)	150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-243AA	—
Supplier Device Package	SOT-89	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BCX56,135 are classified into three categories based on electrical parameter alignment and manufacturing source:

Parametric Equivalents (Nexperia USA Inc.): Parts BCX56,115 and BCX56-10,115 and BCX56-10,135 share identical electrical specifications with the main part, including 80 V breakdown voltage, 1 A maximum collector current, 180 MHz transition frequency, and 1.25 W power rating. These parts differ only in packaging format (Cut Tape vs. Tape & Reel) and DC current gain binning. Parametric equivalents provide direct functional replacement with no electrical performance variation.

Direct Manufacturer Equivalents (Alternative Manufacturers): Part BCX5610TA from Diodes Incorporated meets all critical electrical parameters (80 V, 1 A, 100 nA cutoff current, 63 hFE minimum) with minor variations in transition frequency (150 MHz vs. 180 MHz) and power rating (1 W vs. 1.25 W). This part operates within the same thermal range and maintains SOT-89-3 packaging compatibility.

Similar Performance Parts: Parts BCX5616TA, BCX5616QTA, BSR43TA, BCX56-TP, 2SD1898T100P, and 2SC3646S-TD-E provide functional substitution with acceptable parameter deviations. These parts maintain the 80 V breakdown voltage and 1 A collector current specifications but exhibit variations in transition frequency (100–150 MHz), power dissipation (500 mW–2 W), DC current gain (63–100 hFE), and package variants (SOT-89-3, PCP, MPT3). Selection depends on application-specific thermal and frequency requirements.

Key Parameters for Substitution Determination:

Collector-Emitter Breakdown Voltage: 80 V minimum
Maximum Collector Current: 1 A
Vce Saturation: 500 mV @ specified bias conditions
Collector Cutoff Current: ≤100 nA
DC Current Gain (hFE): ≥63 @ specified conditions
Mounting Type: Surface Mount
Package Compatibility: TO-243AA mechanical envelope

Parameter Comparison

Part Number	Manufacturer	Ic (Max) A	Vce(br) V	Vce Sat mV	hFE Min	Power W	Freq MHz	Package	Status
BCX56,135	Nexperia USA Inc.	1	80	500	63	1.25	180	SOT-89	Active
BCX56,115	Nexperia USA Inc.	1	80	500	63	1.25	180	SOT-89	Active
BCX56-10,115	Nexperia USA Inc.	1	80	500	63	1.25	180	SOT-89	Active
BCX56-10,135	Nexperia USA Inc.	1	80	500	63	1.25	180	SOT-89	Active
BCX5610TA	Diodes Incorporated	1	80	500	63	1	150	SOT-89-3	Active
BCX5616TA	Diodes Incorporated	1	80	500	100	1	150	SOT-89-3	Active
BCX5616QTA	Diodes Incorporated	1	80	500	100	2	150	SOT-89-3	Active
BSR43TA	Diodes Incorporated	1	80	500	100	1	100	SOT-89-3	Active
BCX56-TP	Micro Commercial Co	1	80	500	63	0.5	130	SOT-89	Active
2SD1898T100P	Rohm Semiconductor	1	80	400	82	2	100	MPT3	Not For New Designs
2SC3646S-TD-E	onsemi	1	100	400	100	0.5	120	PCP	Active

Engineering Selection Recommendations

Primary Selection (Parametric Equivalents): BCX56,115, BCX56-10,115, and BCX56-10,135 are direct parametric equivalents manufactured by Nexperia USA Inc. with identical electrical specifications to the BCX56,135. These parts are recommended for applications requiring exact performance matching. Selection between these three parts depends on packaging format availability: BCX56,115 is supplied in Cut Tape & Digi-Reel format, while BCX56-10,115 and BCX56-10,135 are supplied in Tape & Reel format. All three maintain Active product status and ROHS3 compliance.

Secondary Selection (Direct Manufacturer Alternatives): BCX5610TA from Diodes Incorporated provides functional equivalence with 80 V breakdown voltage and 1 A collector current. The transition frequency is reduced to 150 MHz and power rating to 1 W, which is acceptable for applications not requiring the full 180 MHz bandwidth or 1.25 W dissipation of the original part. This part is Active status and ROHS3 compliant.

Tertiary Selection (Similar Performance Parts): BCX5616TA and BCX5616QTA from Diodes Incorporated, BSR43TA from Diodes Incorporated, and BCX56-TP from Micro Commercial Co maintain the 80 V and 1 A specifications with variations in transition frequency (100–150 MHz) and power rating (0.5–2 W). These parts are suitable for applications where the reduced frequency response or power dissipation does not impact circuit performance. All are Active status and ROHS3 compliant.

Not Recommended for New Designs: 2SD1898T100P from Rohm Semiconductor carries "Not For New Designs" product status and should not be selected for new circuit development, despite meeting electrical parameter requirements.

Compliance Considerations: All recommended substitute parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity level, and REACH Unaffected status, matching the regulatory profile of the BCX56,135.

Frequently Asked Questions (FAQ)

Q: Can BCX56,115 be used as a direct replacement for BCX56,135?

A: Yes. BCX56,115 is a parametric equivalent with identical electrical specifications (80 V, 1 A, 180 MHz, 1.25 W). The only difference is packaging format: BCX56,115 is supplied in Cut Tape & Digi-Reel format, while BCX56,135 is supplied in Tape & Reel format. Both parts are manufactured by Nexperia USA Inc. and are Active status.

Q: What is the difference between BCX56-10,115 and BCX56,135?

A: Both parts are parametric equivalents with identical electrical performance. The designation difference reflects internal Nexperia binning or manufacturing process variants. Both are supplied in Tape & Reel packaging and maintain the same 80 V, 1 A, 180 MHz, and 1.25 W specifications.

Q: Can BCX5610TA from Diodes Incorporated replace BCX56,135?

A: BCX5610TA is functionally compatible with reduced specifications. It maintains 80 V breakdown voltage and 1 A collector current but operates at 150 MHz transition frequency (vs. 180 MHz) and 1 W power rating (vs. 1.25 W). This substitution is acceptable for applications not requiring the full bandwidth or thermal headroom of the original part.

Q: Why is 2SD1898T100P listed but not recommended?

A: 2SD1898T100P carries "Not For New Designs" product status from Rohm Semiconductor, indicating the manufacturer has discontinued active support for new circuit development. While the part meets electrical parameter requirements, it should not be selected for new designs due to obsolescence risk and potential supply constraints.

Q: Are there package compatibility issues between SOT-89 and SOT-89-3 variants?

A: SOT-89 and SOT-89-3 packages share the same TO-243AA mechanical envelope and pin configuration, ensuring PCB footprint compatibility. However, verify with component datasheets for any subtle dimensional or thermal interface differences specific to your application.

Q: What is the significance of DC current gain (hFE) variations among substitute parts?

A: DC current gain variations (63–100 hFE minimum) affect base drive requirements and switching speed in circuit applications. Parts with higher hFE (100 vs. 63) require less base current for saturation but may exhibit different switching characteristics. Circuit design should account for these variations through appropriate base resistor sizing.

Q: Can BCX56-TP from Micro Commercial Co be used in high-power applications?

A: BCX56-TP has a maximum power rating of 500 mW, compared to 1.25 W for BCX56,135. This part is suitable only for applications with thermal dissipation below 500 mW. For higher power requirements, select BCX5616QTA (2 W) or 2SD1898T100P (2 W).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level, matching the regulatory profile of the BCX56,135. REACH status is Unaffected for all parts.

Q: What is the operating temperature range for substitute parts?

A: BCX56,135 and Nexperia parametric equivalents specify 150°C maximum junction temperature. Diodes Incorporated parts (BCX5610TA, BCX5616TA, BCX5616QTA, BSR43TA) specify -65°C to 150°C operating range. onsemi 2SC3646S-TD-E specifies 150°C maximum. Verify thermal requirements for your specific application.

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