MAX2601ESA RF Transistor NPN Equivalent & Substitute Parts

Part Overview

The MAX2601ESA is an RF transistor NPN designed for high-frequency applications, rated at 15V collector-emitter breakdown voltage with 1GHz transition frequency and 6.4W maximum power dissipation in an 8-SOIC surface mount package with exposed pad. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The MAX2601ESA+ represents the active production equivalent with identical electrical specifications but improved RoHS3 compliance status.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	15V	V
Frequency - Transition	1GHz	GHz
Noise Figure (Typ @ f)	3.3dB @ 836MHz	dB
Gain	11.6dB	dB
Power - Max	6.4W	W
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 250mA, 3V	—
Current - Collector (Ic) (Max)	1.2A	A
Operating Temperature (TJ)	150°C	°C
Mounting Type	Surface Mount	—
Package / Case	8-SOIC (0.154", 3.90mm Width) Exposed Pad	—

Substitute Part Grouping Explanation

Substitution logic for the MAX2601ESA is based on the following critical parameters that determine functional equivalence:

Primary Equivalence Criteria:

Transistor Type: NPN
Voltage - Collector Emitter Breakdown (Max): 15V minimum
Frequency - Transition: 1GHz minimum
Power - Max: 6.4W minimum
Current - Collector (Ic) (Max): 1.2A minimum
Mounting Type: Surface Mount
Operating Temperature: 150°C (TJ)

Direct Equivalent: MAX2601ESA+ is the active production variant of MAX2601ESA with identical electrical specifications. The primary difference is product status (Active vs. Obsolete) and RoHS3 compliance improvement.

Functional Substitutes: The remaining substitute parts meet the core NPN RF transistor classification but vary in specific electrical parameters. Substitution feasibility depends on application-specific requirements for frequency response, power handling, current capacity, and package form factor. Each substitute part is listed with its actual measured parameters to enable direct comparison against application requirements.

Parameter Comparison

Part Number	Manufacturer	Vce (Max) [V]	Frequency [GHz]	Power (Max) [W]	Ic (Max) [A]	Gain [dB]	Package	Product Status	RoHS Status
MAX2601ESA	Analog Devices Inc./Maxim Integrated	15	1	6.4	1.2	11.6	8-SOIC-EP	Obsolete	Non-compliant
MAX2601ESA+	Analog Devices Inc./Maxim Integrated	15	1	6.4	1.2	11.6	8-SOIC-EP	Active	ROHS3 Compliant
2SC5488A-TL-H	onsemi	10	7	0.1	0.07	12	3-SSFP	Active	ROHS3 Compliant
BFP405FH6327XTSA1	Infineon Technologies	4.5	25	0.075	0.025	22.5	4-TSFP	Active	ROHS3 Compliant
BFR360L3E6765XTMA1	Infineon Technologies	9	14	0.21	0.035	11.5–16	PG-TSLP-3-1	Active	ROHS3 Compliant
MCH4020-TL-H	onsemi	8	16	0.4	0.15	17.5	4-MCPH	Active	ROHS3 Compliant
MMBT918LT1G	onsemi	15	0.6	0.225	0.05	11	SOT-23-3	Active	ROHS3 Compliant
MRF10031	MACOM Technology Solutions	55	—	30	3	9.5	332A-03	Active	ROHS3 Compliant
NSVMMBTH10LT1G	onsemi	25	0.65	0.225	—	—	SOT-23-3	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Recommended for Obsolescence Mitigation):

MAX2601ESA+ is the recommended direct replacement. It maintains 100% electrical equivalence with the obsolete MAX2601ESA while offering Active product status and ROHS3 compliance. No circuit redesign or validation is required. Packaging remains identical (8-SOIC-EP), and all electrical parameters are preserved.

Functional Substitutes (Application-Dependent Selection):

Selection of functional substitutes requires evaluation against specific application requirements:

2SC5488A-TL-H (onsemi): Suitable for applications requiring higher frequency operation (7GHz) but with reduced power handling (100mW) and lower collector current (70mA). Voltage rating reduced to 10V.
BFP405FH6327XTSA1 (Infineon Technologies): Designed for ultra-high-frequency applications (25GHz) with minimal power dissipation (75mW). Voltage rating significantly reduced to 4.5V. Not suitable for high-power RF applications.
BFR360L3E6765XTMA1 (Infineon Technologies): Optimized for high-frequency operation (14GHz) with moderate power handling (210mW). Voltage rating reduced to 9V. Suitable for frequency-critical applications with lower power requirements.
MCH4020-TL-H (onsemi): Balanced for high-frequency operation (16GHz) with moderate power handling (400mW) and collector current (150mA). Voltage rating reduced to 8V.
MMBT918LT1G (onsemi): Suitable for lower-frequency applications (600MHz) with voltage rating matching the original (15V). Power handling reduced to 225mW. Offers extended temperature range (-55°C to 150°C).
MRF10031 (MACOM Technology Solutions): Designed for high-power applications (30W) with elevated voltage rating (55V) and high collector current (3A). Mounting type is Chassis Mount (not surface mount). Frequency specification not provided.
NSVMMBTH10LT1G (onsemi): Suitable for lower-frequency applications (650MHz) with elevated voltage rating (25V). Power handling reduced to 225mW. Offers extended temperature range (-55°C to 150°C).

Compliance Status:

All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The MAX2601ESA is RoHS non-compliant; migration to MAX2601ESA+ or any listed substitute ensures compliance with modern procurement standards.

Frequently Asked Questions (FAQ)

Q1: Can MAX2601ESA+ be used as a direct drop-in replacement for MAX2601ESA?

A: Yes. MAX2601ESA+ is the active production equivalent with identical electrical specifications, package form factor (8-SOIC-EP), and pinout. No circuit modifications are required. The primary differences are product status (Active vs. Obsolete) and improved RoHS3 compliance.

Q2: What are the key differences between MAX2601ESA and the other substitute parts?

A: The MAX2601ESA is optimized for 1GHz RF applications with 6.4W power handling and 1.2A collector current in a surface mount 8-SOIC package. Substitute parts vary significantly in frequency response (600MHz to 25GHz), power dissipation (75mW to 30W), collector current (25mA to 3A), and package form factors. Selection depends on application-specific frequency, power, and current requirements.

Q3: Which substitute part is suitable for high-frequency applications above 10GHz?

A: BFP405FH6327XTSA1 (25GHz), BFR360L3E6765XTMA1 (14GHz), and MCH4020-TL-H (16GHz) are designed for high-frequency operation. However, all three have significantly reduced power handling and collector current compared to MAX2601ESA. Verify that reduced power and current ratings are acceptable for the target application.

Q4: Can MRF10031 replace MAX2601ESA in a surface mount design?

A: No. MRF10031 is a Chassis Mount component (332A-03 package), not a surface mount device. It is unsuitable for PCB-based surface mount applications. Additionally, its frequency specification is not provided, making frequency compatibility assessment impossible.

Q5: What is the impact of voltage rating differences when selecting a substitute?

A: Voltage rating (Vce Max) determines the maximum collector-emitter voltage the transistor can withstand. Substitutes with lower voltage ratings (e.g., BFP405FH6327XTSA1 at 4.5V) cannot be used in circuits designed for the MAX2601ESA's 15V rating without circuit redesign. Substitutes with higher voltage ratings (e.g., MRF10031 at 55V) can be used in lower-voltage applications but may introduce unnecessary cost and size.

Q6: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The original MAX2601ESA is RoHS non-compliant. Migration to any listed substitute ensures compliance with current environmental and procurement regulations.

Q7: What package considerations apply when selecting a substitute?

A: The MAX2601ESA uses an 8-SOIC-EP (8-pin Small Outline Integrated Circuit with Exposed Pad) surface mount package. Substitute parts use different packages: 3-SSFP, 4-TSFP, PG-TSLP-3-1, 4-MCPH, SOT-23-3, and 332A-03. Package changes require PCB layout modifications and may affect thermal management. Verify PCB compatibility before selection.

Q8: Which substitute offers the closest electrical match to MAX2601ESA?

A: MAX2601ESA+ is the closest match with 100% electrical equivalence. Among functional substitutes, MMBT918LT1G and NSVMMBTH10LT1G share the same 15V and 25V voltage ratings respectively, but operate at lower frequencies (600MHz and 650MHz) with reduced power handling (225mW each).

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