BC860CE6359HTMA1 Equivalent & Substitute Parts

Part Overview

The BC860CE6359HTMA1 is a PNP bipolar junction transistor manufactured by Infineon Technologies, designed for general-purpose switching and amplification applications. This device operates at 45V collector-emitter breakdown voltage with a maximum collector current of 100mA and transition frequency of 250MHz. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, current capacity, saturation characteristics, and thermal performance while accommodating variations in frequency response and gain characteristics.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector Current (Max)	100	mA
Voltage - Collector Emitter Breakdown (Max)	45	V
Vce Saturation (Max) @ Ib, Ic	650mV @ 5mA, 100mA	—
Current - Collector Cutoff (Max)	15	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	420 @ 2mA, 5V	—
Power Dissipation (Max)	330	mW
Frequency - Transition	250	MHz
Operating Temperature (Max)	150	°C
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the BC860CE6359HTMA1 is determined by strict adherence to the following critical parameters:

Mandatory Matching Parameters:

Transistor Type: PNP
Collector Current (Max): 100 mA
Voltage - Collector Emitter Breakdown (Max): 45 V
Package / Case: TO-236-3, SC-59, SOT-23-3
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Allowable Variation Parameters:

Vce Saturation (Max): Substitute values must not exceed 650mV at specified test conditions
DC Current Gain (hFE): Minimum values may vary; lower gain is acceptable for switching applications
Power Dissipation (Max): Substitute values of 225mW or greater are acceptable
Frequency - Transition: Values from 70MHz to 250MHz are acceptable for general-purpose applications
Operating Temperature Range: Minimum operating temperature may extend below 0°C; maximum must reach 150°C

Substitute parts are grouped into three categories based on product status and availability: parametric equivalents (Last Time Buy status), direct manufacturer alternatives (Active status), and manufacturer-recommended alternatives (Active status with automotive qualification where applicable).

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce(br) V	Vce Sat (Max) mV	hFE (Min)	Power (Max) mW	fT MHz	Temp (Max) °C	Status
BC860CE6359HTMA1	Infineon	100	45	650	420	330	250	150	Obsolete
BC857CE6327HTSA1	Infineon	100	45	650	420	330	250	150	Last Time Buy
BCW70LT1G	onsemi	100	45	300	215	225	—	150	Active
SBC857CLT1G	onsemi	100	45	650	420	300	100	150	Active
2PB709ART,215	NXP USA Inc.	100	45	500	210	250	70	150	Active
2PB709ART,235	Nexperia USA Inc.	100	45	500	120	250	70	150	Active
2PB709ASL,235	Nexperia USA Inc.	100	45	500	290	250	80	150	Active
BC857A RFG	Taiwan Semiconductor	100	45	650	125	200	100	150	Active
BC857A-HF	Comchip Technology	100	45	650	125	250	100	150	Active
BC857ALT1G	onsemi	100	45	650	125	300	100	150	Active
BC857B-HF	Comchip Technology	100	45	650	125	250	100	150	Active

Engineering Selection Recommendations

Tier 1 - Parametric Equivalent (Immediate Replacement):

BC857CE6327HTSA1 (Infineon Technologies) provides direct electrical equivalence to the BC860CE6359HTMA1 across all critical parameters. This part maintains identical collector current, breakdown voltage, saturation voltage, current gain, power dissipation, and transition frequency specifications. The part carries Last Time Buy status, indicating limited availability. This option is suitable for designs requiring no circuit modification and maximum electrical compatibility.

Tier 2 - Direct Manufacturer Alternatives (Active Production):

SBC857CLT1G (onsemi) and BC857ALT1G (onsemi) are active production parts meeting all mandatory electrical parameters. Both devices maintain 100mA collector current, 45V breakdown voltage, and 650mV saturation voltage specifications. SBC857CLT1G includes AEC-Q101 automotive qualification. BC857ALT1G offers the highest inventory availability (747,693 pieces) among all substitutes. These parts are suitable for new designs and high-volume procurement.

Tier 3 - Manufacturer-Recommended Alternatives (Automotive Grade):

2PB709ART,215, 2PB709ART,235, and 2PB709ASL,235 (Nexperia/NXP) are active production parts with AEC-Q101 automotive qualification. These devices meet all mandatory parameters but exhibit reduced saturation voltage (500mV maximum) and lower transition frequency (70-80MHz). These parts are suitable for automotive applications and designs where lower saturation voltage provides performance benefits.

Tier 4 - Gain-Reduced Alternatives (Switching Applications):

BC857A RFG (Taiwan Semiconductor), BC857A-HF (Comchip Technology), and BC857B-HF (Comchip Technology) provide reduced DC current gain (125 minimum) compared to the original part (420 minimum). These devices are suitable for switching applications where high gain is not required and offer active production status with established supply chains.

Tier 5 - Lower Power Alternative:

BCW70LT1G (onsemi) operates at reduced power dissipation (225mW maximum) and exhibits lower saturation voltage (300mV maximum). This part is suitable for power-constrained applications and offers active production status.

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q1: Can BC857CE6327HTSA1 be used as a direct replacement for BC860CE6359HTMA1?

A: Yes. BC857CE6327HTSA1 is a parametric equivalent meeting all electrical specifications including collector current (100mA), breakdown voltage (45V), saturation voltage (650mV), current gain (420 minimum), power dissipation (330mW), and transition frequency (250MHz). Both parts use identical SOT-23-3 packaging. The primary difference is product status: BC857CE6327HTSA1 is Last Time Buy, indicating limited future availability.

Q2: What is the difference between SBC857CLT1G and BC857ALT1G?

A: Both parts are onsemi products meeting identical electrical specifications. SBC857CLT1G includes AEC-Q101 automotive qualification and is specified for automotive applications. BC857ALT1G is a general-purpose grade with significantly higher inventory availability (747,693 pieces versus 1,160 pieces). Both devices maintain 100mA collector current, 45V breakdown voltage, 650mV saturation voltage, and 100MHz transition frequency. Selection depends on application requirements and procurement volume.

Q3: Why do 2PB709 series parts show lower saturation voltage (500mV) than the original BC860CE6359HTMA1 (650mV)?

A: Lower saturation voltage indicates improved switching performance and reduced power dissipation during saturation. This is a beneficial characteristic for switching applications. The 2PB709 series parts are manufacturer-recommended alternatives suitable for designs where lower saturation voltage provides performance advantages. All parts maintain the 45V breakdown voltage and 100mA collector current requirements.

Q4: Can BCW70LT1G be used in applications requiring 330mW power dissipation?

A: No. BCW70LT1G is rated for 225mW maximum power dissipation, which is 105mW below the original BC860CE6359HTMA1 specification (330mW). This part is suitable only for applications where actual power dissipation does not exceed 225mW. For designs requiring full 330mW capability, use BC857CE6327HTSA1, SBC857CLT1G, or BC857ALT1G.

Q5: Are all substitute parts available in the same SOT-23-3 package?

A: Yes. All substitute parts listed use TO-236-3, SC-59, or SOT-23-3 packaging designations, which are equivalent surface-mount packages. All parts are suitable for direct PCB footprint replacement without layout modification.

Q6: Which substitute part offers the best long-term availability?

A: BC857ALT1G (onsemi) offers the highest inventory availability at 747,693 pieces in stock. This part is active production status with established supply chains. For long-term procurement security, BC857ALT1G is the recommended choice for new designs.

Q7: Do any substitute parts include automotive qualification?

A: Yes. SBC857CLT1G (onsemi), 2PB709ART,215 (NXP USA Inc.), 2PB709ART,235 (Nexperia USA Inc.), and 2PB709ASL,235 (Nexperia USA Inc.) all carry AEC-Q101 automotive qualification. These parts are suitable for automotive applications requiring qualified components.

Q8: What is the significance of transition frequency variation among substitute parts?

A: Transition frequency (fT) indicates the frequency at which current gain drops to unity. The original BC860CE6359HTMA1 specifies 250MHz. Substitute parts range from 70MHz to 250MHz. For general-purpose switching and low-frequency amplification applications, lower transition frequencies (70-100MHz) are acceptable. For high-frequency applications approaching 250MHz, use BC857CE6327HTSA1 or SBC857CLT1G.

Q9: Can parts with lower DC current gain (hFE) be used in amplifier circuits?

A: Lower DC current gain reduces amplification capability and may require circuit redesign. Parts with hFE minimum of 125 (BC857A RFG, BC857A-HF, BC857ALT1G, BC857B-HF) are suitable for switching applications but not recommended for high-gain amplifier designs. For amplifier applications, use parts with hFE minimum of 210 or higher (2PB709 series) or 420 (BC857CE6327HTSA1, SBC857CLT1G).

Q10: What packaging format should be selected for high-volume manufacturing?

A: For high-volume surface-mount assembly, select parts specified in Tape & Reel (TR) packaging format. BC857ALT1G, SBC857CLT1G, BC857A RFG, BC857A-HF, BC857B-HF, 2PB709ART,235, and 2PB709ASL,235 are all available in Tape & Reel format suitable for automated pick-and-place equipment.

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