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Diodes Incorporated MMSTA56Q-7-F
- Part No.:
- MMSTA56Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MMSTA56Q-7-F.pdf
- Description:
- TRANS PNP 80V 0.5A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:2,150
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Product details
Overview
MMSTA56Q-7-F from Diodes Incorporated is an AEC-Q101-qualified 80V PNP small-signal transistor in SOT323 package, rated for -500mA collector current and -80V VCEO, designed for automotive load switching and signal amplification in engine control units and body electronics.
For engineers reviewing the MMSTA56Q-7-F datasheet, MMSTA56Q-7-F pinout, MMSTA56Q-7-F application, or MMSTA56Q-7-F equivalent, this part delivers verified high-voltage PNP switching with ultra-small footprint, thermal stability to +150°C, and ESD robustness (4kV HBM), critical for space-constrained automotive PCBs.
Technical Context
This PNP bipolar junction transistor uses epitaxial planar die construction to ensure stable DC current gain (hFE ≥ 100 at IC = -10mA) and low saturation voltage (VCE(sat) ≤ -0.25V at IC = -100mA, IB = -10mA). Its -80V breakdown ratings support operation in 24V and 48V automotive subsystems.
Thermal resistance is 625°C/W (junction-to-ambient, on 1oz copper FR4), enabling reliable operation up to +150°C junction temperature. The device meets J-STD-020 Level 1 moisture sensitivity and features matte tin-plated leads for solderability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -80 V - Supports safe switching in 24V/48V automotive power rails with margin |
| IC | -500 mA - Handles moderate-power loads like solenoid drivers and LED arrays |
| hFE | 100 min @ IC = -10mA - Ensures predictable base drive requirements for digital interface |
| VCE(sat) | ≤ -0.25 V @ IC = -100mA - Minimizes conduction loss and self-heating in saturated switch mode |
| fT | 50 MHz - Enables use in medium-speed switching (e.g., PWM dimming up to ~5MHz) |
| PD | 200 mW - Limits continuous dissipation; requires thermal-aware layout on 1oz copper |
| ESD HBM | 4,000 V - Provides robust handling during automated assembly and in-vehicle EMI environments |
Pinout & Package
Package: SOT323 - ultra-small surface-mount plastic package (2.15 × 2.10 × 0.95 mm), UL 94V-0 rated, 0.006 g weight, lead-free and halogen-free "Green" construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current source terminal for PNP operation | Connected to higher potential rail; defines reference for base bias and load return path |
| Base (B) | Control input for minority-carrier injection | Requires negative-going drive relative to emitter to turn on; typical RB = 10kΩ for logic-level interfacing |
| Collector (C) | Current sink terminal | Connected to load and ground; carries full switched current with minimal VCE(sat) drop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood applications including temperature cycling, humidity, and mechanical shock |
| Ultra-small SOT323 footprint | Reduces board area by >50% vs. SOT23; enables dense routing in ECUs and ADAS modules |
| Epitaxial planar die | Delivers consistent hFE and low leakage (ICEX ≤ -100nA at -80V, +125°C) |
| PPAP capability | Supports full production part approval process for Tier 1 automotive suppliers |
| Halogen & antimony free | Meets automotive OEM green material specifications (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Engine Control Unit (ECU) Input Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Clamping transient voltages on sensor inputs exposed to battery dump energy. IC Role / Device Role / Timing Role: PNP transistor used as active clamp in series with pull-up resistor to suppress >80V spikes. Use Value: Leverages -80V VCEO and -80V BVCBO to absorb transients without breakdown, protecting downstream MCU GPIOs. | Use Scenario: Driving door lock actuators and mirror position motors in 12V/24V systems. IC Role / Device Role / Timing Role: Low-side PNP switch controlling motor direction via H-bridge half-bridge configuration. Use Value: -500mA IC rating and -0.25V VCE(sat) minimize heat generation and enable compact heatsinkless design. |
| LED Headlamp Dimming Circuit | Automotive HVAC Blower Control |
Use Scenario: PWM-controlled current sink for high-brightness LED strings in adaptive front lighting. IC Role / Device Role / Timing Role: High-speed PNP switch modulating LED current at 1–5 kHz with minimal switching loss. Use Value: 50 MHz fT ensures clean edge fidelity and low distortion across PWM duty cycles. | Use Scenario: Regulating blower motor speed via linear current control in cabin air systems. IC Role / Device Role / Timing Role: Linear-mode PNP pass element operating in active region with feedback loop. Use Value: Stable hFE (≥100) and low VBE(sat) (-1.2V) enable precise analog current regulation with minimal base drive overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBT5401-7-F | VCEO = -160V, IC = -600mA, SOT23 package (larger footprint) | Higher voltage margin but 30% larger board area; not AEC-Q101 qualified | Select when >80V headroom required and automotive qualification is not mandatory |
| PN2907A-TP | VCEO = -60V, IC = -600mA, TO-92 through-hole | Limited to non-automotive or prototyping; lacks AEC-Q101, ESD, and SMT compatibility | Use only for cost-sensitive non-automotive designs where manual assembly is acceptable |
Compared with MMSTA56Q-7-F, MMBT5401-7-F trades automotive compliance for higher voltage rating and larger size, while PN2907A-TP sacrifices reliability, miniaturization, and ESD robustness for legacy through-hole compatibility and lower unit cost.
Availability
MMSTA56Q-7-F is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, LED lighting systems, and HVAC subsystems requiring stable component supply with AEC-Q101 assurance and traceable green sourcing.
Supply support for MMSTA56Q-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.
The MMSTA56Q belongs to Diodes' AEC-Q101-qualified small-signal transistor product line, engineered specifically for space-constrained, thermally demanding automotive signal switching and load control applications.
FAQ
Is MMSTA56Q-7-F suitable for linear amplifier applications?
Yes - its hFE ≥ 100 at IC = -10mA and stable gain over temperature (-55°C to +150°C) supports Class-A preamplifier stages in automotive audio sensors. However, its 200 mW power limit restricts use to low-power, low-distortion signal conditioning-not RF or high-fidelity output stages.
What is the maximum operating frequency for switching use?
The MMSTA56Q-7-F has a current gain-bandwidth product (fT) of 50 MHz at VCE = -1.0V and IC = -100mA. For reliable hard-switching, practical duty-cycle-stable operation is confirmed up to 5 MHz; above that, gain roll-off and switching losses increase significantly.
Can it replace an NPN transistor in existing circuits?
No - it is a PNP device with inverted polarity: emitter connects to VCC, collector to load, and base driven negative relative to emitter. Direct substitution requires circuit topology revision, including inversion of bias networks and logic polarity. Its complementary NPN is MMSTA06Q.
Does the "-7-F" suffix indicate tape-and-reel packaging?
Yes - "-7-F" denotes 3,000-unit tape-and-reel packaging per JEDEC standard, with 8 mm tape width and 7-inch reel diameter. The "F" confirms full RoHS and halogen-free compliance per Diodes' Green definition, verified by independent lab testing.
MMSTA56Q-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):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 80 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:
- 50MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
MMSTA56Q-7-F FAQ
1.How can I place an order for MMSTA56Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSTA56Q-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 MMSTA56Q-7-F reliable?
The price and inventory of MMSTA56Q-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 MMSTA56Q-7-F is usually 5 days.
3.What payment methods are accepted for MMSTA56Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSTA56Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSTA56Q-7-F?
MMSTA56Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSTA56Q-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 MMSTA56Q-7-F?
For technical support, including MMSTA56Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSTA56Q-7-F requirements.
6.How does Aetrix verify that MMSTA56Q-7-F is sourced from the original manufacturer or authorized distributors?
All MMSTA56Q-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 MMSTA56Q-7-F meets industry standards.
7.What is the process for return or replacement of MMSTA56Q-7-F?
All MMSTA56Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSTA56Q-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 MMSTA56Q-7-F part is unused and in its original packaging.
Return procedure for MMSTA56Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSTA56Q-7-F Tags
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