My Inquiry
My Account
Diodes Incorporated MMST5401Q-7-F
- Part No.:
- MMST5401Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MMST5401Q-7-F.pdf
- Description:
- TRANS PNP 150V 0.2A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:2,383
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMST5401Q-7-F from Diodes Incorporated is a 160V PNP small-signal transistor in SOT323 package, rated for -150V VCEO, -200mA IC, and 200mW power dissipation, with hFE = 50–240 at IC = -1 to -50mA, used in automotive-grade low-power switching and amplification circuits.
For engineers reviewing the MMST5401Q-7-F datasheet, MMST5401Q-7-F pinout, MMST5401Q-7-F application, or MMST5401Q-7-F equivalent, key selection criteria include VCEO rating, hFE consistency across temperature, ESD robustness (HBM 4kV), AEC-Q101 qualification, and SOT323 thermal performance under PCB-constrained conditions.
Technical Context
This PNP bipolar junction transistor employs epitaxial planar die construction for stable gain and breakdown characteristics across -55°C to +150°C operating range. Its complementary NPN counterpart is MMST5551, enabling matched pair design in differential or push-pull configurations.
Designed for automotive applications, it meets AEC-Q101 stress testing requirements and supports PPAP documentation. Electrical and thermal specs are identical to standard MMST5401 variants except for traceability and screening-no derating or parameter deviation is specified for the Q-grade version.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -150 V - maximum safe collector-emitter voltage before avalanche conduction in switching-off state |
| IC | -200 mA - continuous DC collector current limit defining usable load drive capability |
| PD | 200 mW - max steady-state power dissipation on FR-4 PCB with minimum pad layout under still air |
| hFE | 50–240 - DC current gain range across IC = -1mA to -50mA, critical for bias stability in amplifier stages |
| fT | 100–300 MHz - transition frequency indicating usable bandwidth for RF or high-speed switching |
| ESD HBM | 4,000 V - human-body-model electrostatic immunity level required for automotive assembly environments |
| RθJA | 625 °C/W - junction-to-ambient thermal resistance, determining temperature rise per mW of dissipated power |
Pinout & Package
Package: SOT323 - ultra-small surface-mount plastic case (2.15 × 2.10 × 0.95 mm), halogen/antimony-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current source terminal in PNP operation | Connected to higher potential rail; sets reference for base control and collector current sourcing |
| Base (B) | Control electrode for minority-carrier injection | Requires negative bias relative to emitter to forward-bias BE junction and enable conduction |
| Collector (C) | Current sink terminal in PNP operation | Connected to load; carries full emitter current minus base current when saturated or active |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood and infotainment systems requiring extended temperature cycling and humidity exposure |
| Ultra-small SOT323 footprint | Enables high-density PCB layouts in space-constrained modules such as LED drivers and sensor signal conditioning |
| hFE guaranteed over -55°C to +150°C | Ensures predictable biasing and gain stability across full automotive ambient operating range |
| 4 kV HBM ESD rating | Reduces risk of field failure during handling, reflow, or system-level transient events in vehicle assembly |
Applications
| Automotive LED Tail Light Driver | Low-Voltage Sensor Signal Amplifier |
|---|---|
Use Scenario: Switching 12V/24V LED arrays in rear lighting modules with PWM dimming control. IC Role / Device Role / Timing Role: PNP switch controlling current path from battery rail to LED cathode, driven by microcontroller GPIO. Use Value: -150V VCEO margin prevents breakdown during load dump transients; SOT323 enables compact placement near LEDs. | Use Scenario: Amplifying weak analog outputs from pressure or temperature sensors in engine control units. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier stage providing 20–50× voltage gain at DC–100kHz. Use Value: hFE ≥50 at IC = -1mA ensures stable gain with minimal quiescent current; fT >100MHz supports wideband noise rejection. |
| Engine Control Unit (ECU) Level Shifter | Body Control Module (BCM) Relay Driver |
Use Scenario: Translating 3.3V logic signals from MCU to 12V-compatible inputs in fuel injector or ignition timing circuits. IC Role / Device Role / Timing Role: Inverting level shifter using PNP common-base configuration for fast edge response. Use Value: VBE(SAT) ≤ -1V at IC = -50mA ensures reliable turn-on with low base drive; Cobo = 6 pF minimizes capacitive loading on MCU pins. | Use Scenario: Driving electromagnetic relays for door lock actuators or HVAC fan control in BCMs. IC Role / Device Role / Timing Role: Saturated PNP switch sinking relay coil current through collector to ground-referenced load. Use Value: -0.2V VCE(SAT) at IC = -10mA reduces power loss and self-heating; AEC-Q101 qualification ensures reliability over 15-year vehicle life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP small-signal transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBT5401-7-F | Same die, SOT23 package (larger footprint, RθJA = 350°C/W), non-automotive grade | Lacks AEC-Q101 qualification and PPAP support; not suitable for safety-critical automotive functions | Select only for cost-sensitive industrial or consumer designs where automotive reliability is not required |
| BC807-40,215 | Higher hFE (250–630), lower VCEO (-45V), same SOT323 package, AEC-Q101 qualified | Better gain linearity but insufficient for 12V+ load dump protection; limited to ≤45V supply rails | Prefer for high-gain analog stages in 5–12V systems; avoid in 24V automotive switching where -150V rating is essential |
Compared with MMBT5401-7-F and BC807-40,215, MMST5401Q-7-F uniquely balances automotive qualification, high-voltage capability, and ultra-compact packaging-making it optimal for space-constrained 12V/24V switching where both reliability and voltage margin are mandatory.
Availability
MMST5401Q-7-F is available at Aetrix Electronics and suitable for automotive lighting control, engine management signal conditioning, and body electronics requiring stable component supply with full AEC-Q101 compliance and traceable sourcing.
Supply support for MMST5401Q-7-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets since 1969.
The MMST5401Q-7-F belongs to Diodes' AEC-Q101-qualified small-signal transistor product line, engineered specifically for automotive subsystems demanding robustness, thermal stability, and long-term supply assurance.
FAQ
What is the difference between MMST5401Q-7-F and standard MMST5401-7-F?
The Q-grade variant adds full AEC-Q101 qualification, PPAP capability, and enhanced traceability-including lot-specific test data and automotive-grade screening. Electrically and thermally, both share identical absolute maximum ratings, electrical characteristics, and package dimensions per DS30170 Rev. 11-2.
Can MMST5401Q-7-F replace BC857 in an existing design?
Yes, if the design operates below -45V VCEO and does not require AEC-Q101 compliance. BC857 has lower VCEO (-45V) and different hFE distribution; MMST5401Q-7-F's -150V rating provides significant margin but may require layout review due to SOT323 pad compatibility and thermal derating differences.
Is the SOT323 package suitable for reflow soldering in automotive production?
Yes-SOT323 is qualified for lead-free reflow per J-STD-020, with moisture sensitivity level 1 (unlimited floor life at <30°C/60% RH). Diodes' recommended pad layout and thermal profile ensure reliable joint formation without tombstoning or voiding in high-volume automotive SMT lines.
Does MMST5401Q-7-F support operation at 150°C junction temperature?
Yes-the device is rated for TJ = -55°C to +150°C. At maximum ambient temperature (e.g., +105°C in under-hood applications), power dissipation must be limited to ≤80mW to maintain TJ ≤150°C, calculated using RθJA = 625°C/W and verified via thermal simulation or board-level testing.
MMST5401Q-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 200 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:
- 200 mW
- Frequency - Transition:
- 300MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
MMST5401Q-7-F FAQ
1.How can I place an order for MMST5401Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMST5401Q-7-F 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 MMST5401Q-7-F reliable?
The price and inventory of MMST5401Q-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMST5401Q-7-F is usually 5 days.
3.What payment methods are accepted for MMST5401Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMST5401Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMST5401Q-7-F?
MMST5401Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMST5401Q-7-F 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 MMST5401Q-7-F?
For technical support, including MMST5401Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMST5401Q-7-F requirements.
6.How does Aetrix verify that MMST5401Q-7-F is sourced from the original manufacturer or authorized distributors?
All MMST5401Q-7-F 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 MMST5401Q-7-F meets industry standards.
7.What is the process for return or replacement of MMST5401Q-7-F?
All MMST5401Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMST5401Q-7-F, 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 MMST5401Q-7-F part is unused and in its original packaging.
Return procedure for MMST5401Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMST5401Q-7-F Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
