My Inquiry
My Account
Diodes Incorporated MMSTA05-7
- Part No.:
- MMSTA05-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MMSTA05-7.pdf
- Description:
- TRANS NPN 60V 0.5A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:3,555
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMSTA05-7 from Diodes Incorporated is an NPN small-signal surface-mount transistor in SOT-323 package, rated for 60 V VCEO, 500 mA IC, and 200 mW PD, with hFE ≥ 100 at 10 mA and fT = 100 MHz - used in medium-power amplification and switching circuits in portable audio and power management modules.
For engineers reviewing the MMSTA05-7 datasheet, MMSTA05-7 pinout, MMSTA05-7 application, or MMSTA05-7 equivalent, key selection criteria include VCEO/VCBO rating, saturation voltage under 100 mA drive, thermal resistance (625 °C/W), and SOT-323 footprint compatibility in space-constrained PCB layouts.
Technical Context
This device uses epitaxial planar die construction to ensure stable gain and low leakage across temperature. Its 60 V collector-emitter breakdown and 4.0 V emitter-base rating support biasing in low-voltage rail-sensing and level-shifting topologies.
The transistor operates with verified DC current gain (hFE) of 100 minimum at IC = 10 mA and VCE = 1.0 V, and delivers 100 MHz fT under 2.0 V VCE, 10 mA IC conditions - confirming suitability for RF front-end pre-amplification and high-speed digital switching up to ~10 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - supports operation in 24–48 V intermediate bus monitoring and relay driver stages |
| IC (max) | 500 mA - enables direct drive of small solenoids or LED strings without external buffer |
| PD | 200 mW - limits continuous dissipation on FR-4 PCBs without heatsinking |
| hFE | ≥100 @ 10 mA - ensures reliable base-current-limited switching in logic-level interfaces |
| fT | 100 MHz - validates use in VHF preamps and oscillator buffer stages |
| VCE(SAT) | ≤0.25 V @ 100 mA/10 mA - reduces conduction loss in PWM-controlled load switches |
| RθJA | 625 °C/W - defines thermal derating above 25 °C ambient per Fig. 1 in datasheet |
Pinout & Package
SOT-323 package: ultra-small 3-pin surface-mount plastic case (2.20 × 1.35 × 0.90 mm max), UL 94V-0 rated, lead-free matte tin plating, moisture sensitivity Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to ground or low-side return path; lowest impedance node during saturation |
| 2 (Base) | Control input | Receives current-limited drive (e.g., via 10 kΩ resistor from MCU GPIO) to enable conduction |
| 3 (Collector) | Current source terminal | Supplies switched load current; requires external pull-up or supply connection |
Key Features
| Feature | Design Value |
|---|---|
| Epitaxial planar die | Ensures consistent hFE distribution and low leakage (ICBO ≤ 100 nA) over -55 to +150 °C |
| SOT-323 footprint | Enables <1.5 mm² board area usage - critical for wearables and sensor nodes |
| Lead-free / RoHS-compliant | Meets IPC-J-STD-020C Level 1 moisture sensitivity for standard reflow without baking |
| Green molding compound | Halogen-free formulation compliant with Diodes Inc.'s environmental policy since Date Code 0627 |
Applications
| Portable Audio Amplifiers | LED Driver Circuits |
|---|---|
Use Scenario: Low-noise pre-amplifier stage in Bluetooth earbud mainboard, amplifying analog microphone signal before ADC. IC Role / Device Role / Timing Role: NPN small-signal amplifier configured in common-emitter topology with fixed bias network. Use Value: 100 MHz fT preserves audio bandwidth up to 20 kHz with minimal phase shift; VCE(SAT) ≤ 0.25 V minimizes quiescent power in battery-powered operation. | Use Scenario: Constant-current switch controlling RGB LED string in smart lighting module. IC Role / Device Role / Timing Role: Medium-current switching element driven by PWM microcontroller output. Use Value: 500 mA IC rating allows direct drive of 3× 150 mA LEDs; hFE ≥ 100 ensures full saturation with ≤5 mA base current. |
| Power Supply Monitoring | Level-Shifting Interfaces |
Use Scenario: Voltage rail monitor in 24 V industrial IoT gateway, triggering fault flag when input drops below threshold. IC Role / Device Role / Timing Role: Switched comparator input stage translating analog sense voltage to digital logic level. Use Value: 60 V VCEO withstands transient surges on unregulated inputs; ICES ≤ 100 nA prevents false triggering in high-impedance sensing paths. | Use Scenario: Bidirectional logic-level translator between 3.3 V MCU and 5 V peripheral UART lines. IC Role / Device Role / Timing Role: Active pull-up/pull-down element enabling open-drain interface emulation. Use Value: Fast turn-on/off (enabled by 100 MHz fT) supports UART baud rates up to 1 Mbps; low VBE(SAT) ensures clean 0.7 V threshold transition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN small-signal switching and amplification applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847BW,115 | VCEO = 45 V, hFE = 110–220, SOT-323 package | Limited to ≤45 V rails; higher gain spread may require tighter base-resistor tolerance | Select when lower VCEO suffices and wider hFE range is acceptable for cost-sensitive designs |
| MMBT3904LT1G | VCEO = 40 V, PD = 310 mW, SOT-23 package | Higher power rating but larger footprint; incompatible pinout (E-B-C vs E-B-C in SOT-323) | Choose only if board redesign accommodates SOT-23 and 40 V rating meets system margin |
Compared with BC847BW and MMBT3904LT1G, MMSTA05-7 provides superior 60 V breakdown margin in compact SOT-323 while maintaining tight hFE min specification - making it preferred for 24–48 V industrial sensing and space-constrained consumer power stages.
Availability
MMSTA05-7 is available at Aetrix Electronics and suitable for portable audio amplifiers, LED driver circuits, power supply monitoring, and level-shifting interfaces requiring stable component supply and RoHS-compliant manufacturing.
Supply support for MMSTA05-7 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, headquartered in Plano, Texas, serving automotive, industrial, computing, and consumer markets with high-reliability components.
The MMSTA series belongs to Diodes' small-signal transistor product line, designed specifically for space-constrained, medium-power amplification and switching applications where SOT-323 footprint, consistent gain, and thermal robustness are essential.
FAQ
What is the maximum junction temperature for MMSTA05-7?
The absolute maximum junction temperature is +150 °C, matching its storage temperature limit. Derating begins at 25 °C ambient per RθJA = 625 °C/W - meaning power must be reduced by 0.32 mW/°C above 25 °C to stay within safe operating area.
Is MMSTA05-7 pin-compatible with other SOT-323 transistors?
Yes - MMSTA05-7 uses standard SOT-323 pinout (Emitter-Base-Collector, left-to-right when marking side faces up). It shares mechanical and electrical pin alignment with BC847BW, MMBT2222AL, and DXT75100, though electrical ratings differ.
Does MMSTA05-7 support Pb-free reflow soldering?
Yes - it features matte tin lead finish over Alloy 42 leadframe and complies with J-STD-020C Level 1 moisture sensitivity, allowing standard Pb-free reflow profiles (peak 260 °C) without pre-baking.
How does MMSTA05-7 differ from MMSTA06-7?
MMSTA06-7 has identical package and pinout but higher voltage ratings: VCBO/VCEO = 80 V versus 60 V, with same 500 mA IC, 200 mW PD, and 100 MHz fT. Use MMSTA06-7 where 80 V transient immunity is required.
MMSTA05-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 250mV @ 10mA, 100mA
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 100mA, 1V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
MMSTA05-7 FAQ
1.How can I place an order for MMSTA05-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSTA05-7 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 MMSTA05-7 reliable?
The price and inventory of MMSTA05-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSTA05-7 is usually 5 days.
3.What payment methods are accepted for MMSTA05-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSTA05-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSTA05-7?
MMSTA05-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSTA05-7 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 MMSTA05-7?
For technical support, including MMSTA05-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSTA05-7 requirements.
6.How does Aetrix verify that MMSTA05-7 is sourced from the original manufacturer or authorized distributors?
All MMSTA05-7 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 MMSTA05-7 meets industry standards.
7.What is the process for return or replacement of MMSTA05-7?
All MMSTA05-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSTA05-7, 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 MMSTA05-7 part is unused and in its original packaging.
Return procedure for MMSTA05-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSTA05-7 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…
