2SC5754-A RF Transistor NPN Equivalent & Substitute Parts

Part Overview

The 2SC5754-A is an RF transistor NPN manufactured by CEL, designed for high-frequency applications operating at 20GHz with a maximum power dissipation of 735mW. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, production continuity, and system maintenance. The 2SC5754-A operates at 5V collector-emitter breakdown voltage with a maximum collector current of 500mA and is packaged in SOT-343F surface mount configuration.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	5V	V
Frequency - Transition	20GHz	GHz
Power - Max	735mW	mW
Gain	12dB	dB
Current - Collector (Ic) (Max)	500mA	mA
DC Current Gain (hFE) (Min) @ Ic, Vce	40 @ 100mA, 3V	—
Operating Temperature (TJ)	150°C	°C
Mounting Type	Surface Mount	—
Package / Case	SOT-343F	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—
REACH Status	REACH Unaffected	—

Substitute Part Grouping Explanation

Substitution of the 2SC5754-A is determined by strict alignment of electrical and mechanical parameters within the RF transistor NPN category. The primary substitution criteria are:

Critical Parameters for Substitution:

Transistor Type: NPN (mandatory match)
Voltage - Collector Emitter Breakdown: 5V or higher (backward compatible)
Frequency - Transition: 20GHz or higher (maintains or exceeds RF performance)
Power - Max: 735mW or higher (maintains or exceeds power handling)
Current - Collector (Ic) (Max): 500mA or higher (maintains or exceeds current capability)
Mounting Type: Surface Mount (maintains assembly compatibility)
Operating Temperature: 150°C (standard for RF transistors)

Secondary Compatibility Factors:

Package compatibility: SOT-343F or equivalent compact surface mount packages
Moisture Sensitivity Level: MSL 1 (unlimited) preferred for reliability
REACH and RoHS compliance status for regulatory alignment

Substitute parts are grouped based on frequency performance tier and power dissipation capability. Parts exceeding the 2SC5754-A specifications in frequency and power are suitable for direct substitution in applications where the original device is no longer available.

Parameter Comparison

Part Number	Manufacturer	Vce (Max) [V]	Frequency [GHz]	Power (Max) [mW]	Ic (Max) [mA]	hFE (Min)	Package	Status
2SC5754-A	CEL	5	20	735	500	40	SOT-343F	Obsolete
BFP420H6433XTMA1	Infineon Technologies	5	25	160	35	60	SOT-343	Active
BFP540ESDH6327XTSA1	Infineon Technologies	5	30	250	80	50	SOT-343	Active
BFP640H6327XTSA1	Infineon Technologies	4.5	40	200	50	110	SOT-343	Active
BFP740ESDH6327XTSA1	Infineon Technologies	4.7	45	160	45	160	SOT-343	Active
BFP740FH6327XTSA1	Infineon Technologies	4.7	42	160	30	160	4-TSFP	Active
BFP520FH6327XTSA1	Infineon Technologies	3.5	45	100	40	70	4-TSFP	Active
BFR193WH6327XTSA1	Infineon Technologies	12	8	580	80	70	SOT-323	Active
BFR360FH6765XTSA1	Infineon Technologies	9	14	210	35	90	SOT-723	Active
2SC4713KT146S	Rohm Semiconductor	6	0.8	200	50	180	SOT-23-3	Active
2SC4726TLP	Rohm Semiconductor	11	3.2	150	50	56	SOT-416	Active

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

BFP540ESDH6327XTSA1 and BFP640H6327XTSA1 are the most suitable direct substitutes for the 2SC5754-A. Both devices are manufactured by Infineon Technologies with Active product status, ensuring long-term availability and supply chain stability. BFP540ESDH6327XTSA1 operates at 5V collector-emitter breakdown voltage (matching the original specification) with 30GHz frequency capability and 250mW power dissipation. BFP640H6327XTSA1 operates at 4.5V with 40GHz frequency capability and 200mW power dissipation. Both are packaged in SOT-343 surface mount configuration, compatible with existing PCB layouts designed for SOT-343F. Both devices carry ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements equivalent to the original part.

Secondary Substitutes (Application-Dependent Selection):

BFP420H6433XTMA1 is suitable for applications where 25GHz frequency performance is sufficient and lower power dissipation (160mW) is acceptable. This device maintains 5V collector-emitter breakdown voltage and is packaged in SOT-343.

BFP740ESDH6327XTSA1 and BFP740FH6327XTSA1 are suitable for applications requiring maximum frequency performance (45GHz and 42GHz respectively). BFP740ESDH6327XTSA1 is packaged in SOT-343, while BFP740FH6327XTSA1 uses 4-TSFP packaging. Both operate at 4.7V collector-emitter breakdown voltage with 160mW power dissipation.

Limited Substitutes (Frequency or Current Mismatch):

BFR193WH6327XTSA1 operates at 8GHz frequency, below the 20GHz specification of the 2SC5754-A, and is packaged in SOT-323 rather than SOT-343F. This device is suitable only for applications where lower frequency performance is acceptable.

BFR360FH6765XTSA1 operates at 14GHz frequency, below the 20GHz specification, and is packaged in SOT-723. This device is suitable only for applications where lower frequency performance is acceptable.

2SC4713KT146S operates at 800MHz frequency, significantly below the 20GHz specification, and is packaged in SOT-23-3. This device is not suitable for RF applications requiring 20GHz or higher frequency performance.

2SC4726TLP operates at 3.2GHz frequency, significantly below the 20GHz specification, and is packaged in SOT-416. This device is not suitable for RF applications requiring 20GHz or higher frequency performance.

Compliance and Availability:

All recommended substitute parts carry ROHS3 compliance and REACH Unaffected status. Infineon Technologies substitutes demonstrate Active product status with substantial inventory availability (1,087 to 31,947 pieces in stock), ensuring reliable long-term supply. The 2SC5754-A obsolete status necessitates transition to Active alternatives for production continuity.

Frequently Asked Questions (FAQ)

Q: Can BFP540ESDH6327XTSA1 be used as a direct replacement for 2SC5754-A in all applications?

A: BFP540ESDH6327XTSA1 is electrically compatible with 2SC5754-A for applications operating at or below 5V collector-emitter voltage and 20GHz frequency. The substitute device provides higher frequency capability (30GHz) and lower power dissipation (250mW versus 735mW). PCB layout compatibility requires verification of SOT-343 versus SOT-343F package dimensions, though both are compact surface mount packages with similar pin spacing.

Q: What is the difference between SOT-343 and SOT-343F packaging?

A: Both SOT-343 and SOT-343F are compact surface mount packages with three leads. The "F" designation indicates a specific variant. Mechanical compatibility should be verified against PCB footprint specifications. Most modern PCB designs accommodate both variants without modification.

Q: Why do some substitute parts have lower power dissipation than the 2SC5754-A?

A: Substitute parts such as BFP420H6433XTMA1, BFP740ESDH6327XTSA1, and BFP740FH6327XTSA1 are optimized for higher frequency performance (25GHz to 45GHz) at reduced power levels. These devices are suitable for applications where the original 735mW power capability is not required. Applications demanding full 735mW power dissipation should select BFP540ESDH6327XTSA1 (250mW) or verify that circuit design operates within the lower power envelope of alternative devices.

Q: Are all substitute parts RoHS compliant?

A: All Infineon Technologies and Rohm Semiconductor substitute parts listed carry ROHS3 compliance certification. The original 2SC5754-A carries REACH Unaffected status. All substitute parts maintain equivalent regulatory compliance, ensuring compatibility with environmental and safety standards.

Q: Can BFP640H6327XTSA1 be used in circuits designed for 5V operation?

A: BFP640H6327XTSA1 operates at 4.5V collector-emitter breakdown voltage, which is 0.5V lower than the 2SC5754-A specification of 5V. This device is suitable for circuits operating at 4.5V or lower. Circuits designed specifically for 5V operation should use BFP540ESDH6327XTSA1 (5V rating) or BFP420H6433XTMA1 (5V rating) to maintain voltage margin compliance.

Q: What is the significance of the hFE (DC Current Gain) parameter in substitution?

A: The hFE parameter indicates the current amplification factor of the transistor. The 2SC5754-A specifies hFE minimum of 40 at 100mA and 3V. Substitute parts exhibit varying hFE values (ranging from 50 to 180 depending on the device). Higher hFE values indicate greater current amplification efficiency. Circuit designs should verify that bias network calculations remain valid with the substitute device's hFE specification to ensure proper operating point establishment.

Q: Which substitute part offers the best frequency performance?

A: BFP520FH6327XTSA1 and BFP740ESDH6327XTSA1 both offer 45GHz frequency capability, the highest among all listed substitutes. BFP740FH6327XTSA1 offers 42GHz frequency capability. These devices are suitable for applications requiring maximum RF performance beyond the 20GHz specification of the 2SC5754-A. Package selection between SOT-343 and 4-TSFP depends on PCB layout constraints.

Q: Is inventory availability a consideration for part selection?

A: Yes. BFP640H6327XTSA1 demonstrates the highest inventory availability (31,947 pieces in stock), followed by 2SC4726TLP (15,000 pieces) and BFR360FH6765XTSA1 (8,565 pieces). For production programs requiring sustained supply, devices with higher inventory levels provide greater supply chain security. All recommended substitutes carry Active product status, indicating ongoing manufacturer support and production commitment.

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