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MMBT4401_R1_00001
Panjit International Inc.
TRANS NPN 40V 0.6A SOT23
23998 Pcs New Original In Stock
Bipolar (BJT) Transistor NPN 40 V 600 mA 250MHz 225 mW Surface Mount SOT-23
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5.0 / 5.0
- (127 Ratings)
MMBT4401_R1_00001
Product Overview
12995178
DiGi Electronics Part Number
MMBT4401_R1_00001-DGManufacturer
Panjit International Inc.
MMBT4401_R1_00001
Description
TRANS NPN 40V 0.6A SOT23Inventory
23998 Pcs New Original In Stock
Bipolar (BJT) Transistor NPN 40 V 600 mA 250MHz 225 mW Surface Mount SOT-23
Quantity
Minimum 1
Minimum 1
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MMBT4401_R1_00001 Technical Specifications
Category
Transistors, Bipolar (BJT), Single Bipolar Transistors
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Transistor Type
NPN
Current - Collector (Ic) (Max)
600 mA
Voltage - Collector Emitter Breakdown (Max)
40 V
Vce Saturation (Max) @ Ib, Ic
750mV @ 50mA, 500mA
Current - Collector Cutoff (Max)
100nA
DC Current Gain (hFE) (Min) @ Ic, Vce
100 @ 150mA, 1V
Power - Max
225 mW
Frequency - Transition
250MHz
Operating Temperature
-55°C ~ 150°C (TJ)
Mounting Type
Surface Mount
Package / Case
TO-236-3, SC-59, SOT-23-3
Supplier Device Package
SOT-23
Base Product Number
MMBT4401
Datasheet & Documents
HTML Datasheet
MMBT4401_R1_00001-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.21.0075
Additional Information
Other Names
3757-MMBT4401_R1_00001DKR
3757-MMBT4401_R1_00001TR
Standard Package
3,000
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
MMBT4401-AU_R1_000A1
Panjit International Inc.
763
MMBT4401-AU_R1_000A1-DG
0.0087
Parametric Equivalent
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Les produits de DiGi Electronics sont solides comme le roc et leur prix me permet de profiter de la technologie sans stress.
Dec 02, 2025
I found their prices to be very budget-friendly, making it accessible for all consumers.
Dec 02, 2025
They responded to my inquiries with patience and clarity. Shipping was swift and reliable.
Dec 02, 2025
Their customer service representatives are courteous and display a high level of professionalism.
Dec 02, 2025
The support team at DiGi Electronics is knowledgeable and always ready to assist after my purchase.
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Frequently Asked Questions (FAQ)
When designing in the MMBT4401_R1_00001, what thermal considerations should be addressed to avoid overheating in high-ambient-temperature environments near 125°C?
When using the MMBT4401_R1_00001 in environments approaching 125°C, you must derate the maximum power dissipation below the datasheet's 225 mW rating due to reduced thermal conductivity in surface-mount PCBs. Use a thermal pad and at least two vias to an inner ground plane to improve heat transfer. Avoid placing the MMBT4401_R1_00001 near high-power components and verify actual junction temperature through thermal imaging or IR testing under full load; exceeding safe operating area limits even briefly can accelerate parametric drift or cause early failure.
Can the MMBT4401_R1_00001 reliably replace the BC847B in an amplification stage where hFE consistency impacts gain stability?
While the MMBT4401_R1_00001 and BC847B are both NPN SOT-23 transistors, the MMBT4401_R1_00001 has a higher gain band (100 min @ 150mA) compared to BC847B’s tighter beta binning around 200–450, making it less predictable for precision small-signal amplification. If gain stability is critical, use feedback networks or prefer devices like the BC847B or BCP56 with controlled hFE ranges. The MMBT4401_R1_00001 is better suited for switching applications where exact beta is less critical.
How does the Vce(sat) of the MMBT4401_R1_00001 at 500mA affect efficiency in low-voltage switching circuits powered by 3.3V?
The MMBT4401_R1_00001 has a maximum Vce(sat) of 750mV @ 50mA base drive and 500mA collector current, which results in significant voltage drop and power loss (0.375W) in 3.3V systems. This reduces efficiency and increases thermal load. For better performance in low-voltage switching, consider using a logic-level MOSFET like the DMG2305U or a BJT with lower saturation voltage such as the NSS40301MT1G. If retaining the MMBT4401_R1_00001, ensure sufficient base overdrive and PCB copper for heatsinking.
What risks arise when using the MMBT4401_R1_00001 as a load switch in inductive circuits like relays or solenoids without proper protection?
Using the MMBT4401_R1_00001 as a switch for inductive loads without a flyback diode risks exceeding its 40V collector-emitter breakdown voltage due to back-EMF spikes, potentially causing destructive avalanche breakdown. Even within rated limits, repeated exposure degrades reliability. Always place a fast recovery diode (e.g., 1N4148) across the inductive load, cathode to Vcc. Additionally, verify switching speed to avoid excessive power dissipation during turn-off transients when integrating the MMBT4401_R1_00001 in such applications.
Is the MMBT4401_R1_00001 a suitable drop-in replacement for the 2N3904 in high-frequency switching designs above 100MHz?
The MMBT4401_R1_00001 has a transition frequency (fT) of 250MHz, making it capable of operating above 100MHz, whereas the classic 2N3904 typically has fT around 200MHz but slower switching times in TO-92 packages due to higher parasitics. However, the MMBT4401_R1_00001 in SOT-23 offers better high-frequency performance due to lower package inductance. Ensure proper layout—short traces, minimized parasitic capacitance—and adequate base drive rise/fall times. While it outperforms through-hole 2N3904s at high frequency, verify signal integrity in-circuit as gain drops rapidly near the fT limit when using the MMBT4401_R1_00001.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
MMBT4401_R1_00001 CAD Models
Panjit International Inc. MMBT4401_R1_00001 PCB symbols & footprints
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