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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi FMBM5401

Name: FMBM5401
Brand: onsemi
SKU: FMBM5401
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FMBM5401

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: SOT-23-6 Thin, TSOT-23-6

Datasheet:: FMBM5401.pdf

Description:: TRANS PNP 150V 0.6A SUPERSOT-6

Quantity:: RFQ Add To RFQ list

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Product details

Overview

FMBM5401 from onsemi is a PNP general-purpose amplifier in a matched-die SUPERSOT-6 (TSOT23-6) package, rated for −150 V V_CEO, −600 mA I_C, and 700 mW power dissipation. It delivers matched h_FE across two integrated dies (ratio ≤1.1), low V_CE(sat) (−0.5 V @ −50 mA), and 100–300 MHz f_T, enabling precision current mirror and differential pair applications in high-voltage analog signal conditioning.

For engineers reviewing the FMBM5401 datasheet, pinout, applications, or equivalent options, key selection considerations include its dual-die matching tolerance, PNP high-voltage switching capability, thermal resistance (180 °C/W), and TSOT23-6 footprint compatibility with space-constrained industrial sensor front-ends and power supply error amplifiers.

Technical Context

The FMBM5401 integrates two electrically isolated PNP transistors on a single die within a TSOT23-6 package, with guaranteed h_FE matching (≤±10% at I_C = −10 mA) and V_BE(on) matching (±8 mV). Its design supports precise current mirroring and complementary biasing without external trimming.

It operates across −55 °C to +150 °C junction temperature, features low noise figure (8.0 dB @ 10 Hz–15.7 kHz), and maintains stable breakdown characteristics (BVCBO = −160 V, BVCEO = −150 V), making it suitable for high-reliability feedback loops in DC-DC converters and linear regulators.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−150 V - Supports high-side PNP switching in ≥120 V rail systems without breakdown
I_C (max)	−600 mA - Enables driver-stage current sourcing up to 0.6 A in discrete amplifier designs
P_D	700 mW - Allows continuous operation at 25 °C ambient with 180 °C/W thermal resistance
f_T	100–300 MHz - Ensures usable gain-bandwidth for audio and low-MHz signal amplification
h_FE match	Ratio ≤1.1 - Enables <1% current mismatch in mirrored configurations at −10 mA
V_BE(on) match	±8 mV - Reduces offset error in differential pair inputs without calibration
C_ob	≤6.0 pF - Minimizes Miller capacitance impact on high-frequency stability

Pinout & Package

SUPERSOT-6 (TSOT23-6) package: 6-pin surface-mount, 2.9 mm × 2.8 mm × 0.9 mm body, 0.95 mm pitch, Pb-free and halide-free.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter of Die 1 (E1)	Primary emitter connection for first transistor; tied to reference node in current mirror topologies
2	Base of Die 1 (B1)	Control input for Die 1; used for matched biasing with Die 2 base
3	Collector of Die 1 (C1)	Output node for Die 1; routed to load or feedback path in dual-transistor circuits
4	Collector of Die 2 (C2)	Output node for Die 2; enables symmetrical current sourcing or differential output
5	Base of Die 2 (B2)	Independent control input for Die 2; allows separate or paralleled biasing
6	Emitter of Die 2 (E2)	Second emitter node; used for common-emitter or cascode configurations with matched tracking

Key Features

Feature	Design Value
Dual matched PNP transistors	Integrated on single die with guaranteed h_FE and V_BE tracking for <1% current mismatch
High-voltage PNP structure	−160 V VCBO rating enables use in >100 V collector-rail applications without derating
Low saturation voltage	V_CE(sat) ≤ −0.5 V @ −50 mA ensures minimal conduction loss in active-regulator stages
Low-noise performance	NF ≤ 8.0 dB over audio band supports precision sensor signal amplification
Extended temperature range	−55 °C to +150 °C operation supports under-hood automotive and industrial power modules

Applications

Current Mirror Reference	High-Voltage Error Amplifier
Use Scenario: Precision current replication in isolated feedback paths of flyback and forward DC-DC converters. IC Role / Device Role / Timing Role: Dual PNP transistors serve as matched current source/sink pair in optocoupler-coupled regulation loop. Use Value: ±8 mV V_BE match and ≤1.1 h_FE ratio ensure <1% output current error across temperature without trimming.	Use Scenario: Voltage error sensing in industrial AC-DC power supplies with ≥100 V output rails. IC Role / Device Role / Timing Role: High-voltage PNP pair implements differential input stage for TL431-like shunt regulator interface. Use Value: −150 V V_CEO and −160 V VCBO allow direct connection to 120 V output nodes while maintaining safe margin.
Differential Pair Biasing	Thermal-Stable Sensor Front-End
Use Scenario: Input stage of programmable gain instrumentation amplifiers requiring matched gain-setting transistors. IC Role / Device Role / Timing Role: Two matched dies provide identical transconductance and base-emitter voltage for common-mode rejection. Use Value: Matched h_FE and V_BE reduce input offset drift to <0.5 µV/°C in calibrated designs.	Use Scenario: Signal conditioning for RTD or thermistor bridges in HVAC and motor drive temperature monitoring. IC Role / Device Role / Timing Role: PNP pair forms constant-current source for bridge excitation with inherent thermal tracking. Use Value: Monolithic die matching ensures <0.02 °C equivalent temperature drift between excitation legs over −40 °C to +125 °C.

Current Mirror Reference

High-Voltage Error Amplifier

Use Scenario: Precision current replication in isolated feedback paths of flyback and forward DC-DC converters.

IC Role / Device Role / Timing Role: Dual PNP transistors serve as matched current source/sink pair in optocoupler-coupled regulation loop.

Use Value: ±8 mV V_BE match and ≤1.1 h_FE ratio ensure <1% output current error across temperature without trimming.

Use Scenario: Voltage error sensing in industrial AC-DC power supplies with ≥100 V output rails.

IC Role / Device Role / Timing Role: High-voltage PNP pair implements differential input stage for TL431-like shunt regulator interface.

Use Value: −150 V V_CEO and −160 V VCBO allow direct connection to 120 V output nodes while maintaining safe margin.

Differential Pair Biasing

Thermal-Stable Sensor Front-End

Use Scenario: Input stage of programmable gain instrumentation amplifiers requiring matched gain-setting transistors.

IC Role / Device Role / Timing Role: Two matched dies provide identical transconductance and base-emitter voltage for common-mode rejection.

Use Value: Matched h_FE and V_BE reduce input offset drift to <0.5 µV/°C in calibrated designs.

Use Scenario: Signal conditioning for RTD or thermistor bridges in HVAC and motor drive temperature monitoring.

IC Role / Device Role / Timing Role: PNP pair forms constant-current source for bridge excitation with inherent thermal tracking.

Use Value: Monolithic die matching ensures <0.02 °C equivalent temperature drift between excitation legs over −40 °C to +125 °C.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP dual-transistor amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MBT3906DW1T1G	Single-die dual PNP in SOT-363; no guaranteed h_FE or V_BE matching; f_T = 250 MHz	Lacks monolithic matching-requires external calibration for current mirror accuracy	Choose when cost sensitivity outweighs matching requirement and layout area permits SOT-363
NSV60601MW6T1G	Matched PNP pair in SC-70-6; V_CEO = −60 V; I_C = −300 mA; lower voltage rating limits high-rail use	Not suitable for >60 V collector applications; better for low-voltage portable electronics	Choose only for ≤48 V systems where smaller footprint offsets reduced voltage capability

Compared with MBT3906DW1T1G and NSV60601MW6T1G, the FMBM5401 uniquely combines −150 V rating, monolithic die matching, and 700 mW dissipation-making it the only option for high-voltage, high-accuracy current mirrors in industrial power conversion.

Availability

FMBM5401 is available at Aetrix Electronics and suitable for industrial power supplies, automotive engine control units, and precision sensor signal conditioning requiring stable component supply and long-term manufacturability.

Supply support for FMBM5401 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, with leadership in power management, analog, and sensor technologies.

The FMBM5401 belongs to onsemi's matched bipolar transistor family, designed specifically for high-precision analog functions where monolithic parameter matching eliminates calibration and improves long-term stability in harsh environments.

FAQ

What is the maximum operating junction temperature for the FMBM5401?

The FMBM5401 has a maximum operating junction temperature of +150 °C, as specified in its Absolute Maximum Ratings table. This rating applies under steady-state conditions with proper PCB thermal design-such as mounting on a 1 in² pad of 2 oz copper-to maintain R_JA ≤ 180 °C/W. Operation beyond this limit risks permanent degradation of h_FE matching and breakdown voltage performance.

Does the FMBM5401 support pin-to-pin replacement with standard SOT-23-6 PNP transistors?

No-the FMBM5401 is not a pin-to-pin replacement for generic SOT-23-6 PNP transistors due to its unique dual-die pin assignment (E1-B1-C1-C2-B2-E2). Substituting with non-matched parts like MMBT3906 or DMMT3906 will eliminate h_FE and V_BE tracking. The FMBM5401 must be used with its defined pinout to leverage matched performance.

How is h_FE matching verified across the two dies in the FMBM5401?

h_FE matching in the FMBM5401 is verified per datasheet test condition: V_CE = −5 V, I_C = −10 mA, where DIVID2 guarantees h_FE2(Die1)/h_FE2(Die2) remains between 0.95 and 1.05. This is measured during final test using automated parametric screening-not inferred from typical curves-and applies to every shipped FMBM5401 unit.

Can the FMBM5401 be used in linear regulator pass element applications?

The FMBM5401 is not recommended as a primary pass element due to its −600 mA I_C limit and 700 mW power dissipation-insufficient for high-current linear regulation. However, it is well-suited as an error amplifier or current-sense comparator driver in such regulators, where its matched dies improve reference stability and transient response accuracy.

What is the meaning of "SUPERSOT-6" in the FMBM5401 package description?

SUPERSOT-6 is onsemi's proprietary designation for its enhanced TSOT23-6 package (Case 419AG), featuring tighter dimensional tolerances, optimized thermal pad exposure, and improved wirebond reliability versus standard TSOT23-6. It is mechanically and solder-reflow compatible with industry-standard TSOT23-6 footprints but optimized for high-reliability analog matching performance.

FMBM5401 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SOT-23-6 Thin, TSOT-23-6

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 600 mA

Voltage - Collector Emitter Breakdown (Max):: 150 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 5mA, 50mA

Current - Collector Cutoff (Max):: 50nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 60 @ 10mA, 5V

Power - Max:: 700 mW

Frequency - Transition:: 300MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SuperSOT™-6

FMBM5401 FAQ

1.How can I place an order for FMBM5401 through Aetrix?

Please submit a Request for Quotation (RFQ) for FMBM5401 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for FMBM5401 reliable?

The price and inventory of FMBM5401 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FMBM5401 is usually 5 days.

3.What payment methods are accepted for FMBM5401?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FMBM5401 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FMBM5401?

FMBM5401 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FMBM5401 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for FMBM5401?

For technical support, including FMBM5401 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FMBM5401 requirements.

6.How does Aetrix verify that FMBM5401 is sourced from the original manufacturer or authorized distributors?

All FMBM5401 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that FMBM5401 meets industry standards.

7.What is the process for return or replacement of FMBM5401?

All FMBM5401 units undergo pre-shipment inspection (PSI). If there is an issue with FMBM5401, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The FMBM5401 part is unused and in its original packaging.

Return procedure for FMBM5401:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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