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Diodes Incorporated MMDT5451Q-7
- Part No.:
- MMDT5451Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MMDT5451Q-7.pdf
- Description:
- TRANS NPN/PNP 160V/150V SOT-363
- Quantity:
- Payment:
- Shipping:
Inventory:11,535
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Product details
Overview
MMDT5451Q from Diodes Incorporated is a complementary NPN/PNP small-signal bipolar junction transistor pair in SOT363 package, rated for 160 V (NPN) and –150 V (PNP) VCEO, 200 mA continuous collector current per device, and AEC-Q101 qualified for automotive power switching and medium-gain amplification in space-constrained modules.
For engineers reviewing the MMDT5451Q datasheet, MMDT5451Q pinout, MMDT5451Q application, or MMDT5451Q equivalent, key selection criteria include breakdown voltage symmetry, dual-transistor thermal coupling in shared SOT363 footprint, automotive-grade reliability validation, and DC current gain (hFE) variation across operating currents (1–50 mA).
Technical Context
This device integrates matched NPN and PNP transistors on a single die within a 6-pin SOT363 package, enabling complementary push-pull configurations without inter-device layout mismatch. Its epitaxial planar construction supports stable hFE over temperature (–55°C to +150°C) and low Cobo (6.0 pF) for RF-adjacent switching.
The MMDT5451Q delivers asymmetric saturation performance: NPN VCE(sat) ≤ 0.15 V at IC = 10 mA / IB = 1 mA, while PNP VCE(sat) ≤ –0.20 V under identical bias - critical for minimizing conduction loss in bidirectional signal routing or H-bridge pre-driver stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO (NPN) | 160 V - supports high-side switching in 12 V/24 V automotive loads with ≥6× safety margin |
| VCEO (PNP) | –150 V - enables low-side sinking of inductive loads up to 120 V transient spikes |
| IC (max) | ±200 mA - sufficient for driving small relays, LED strings, or logic-level interface buffers |
| hFE (NPN) | 80–250 @ IC = 1–10 mA - ensures predictable base drive sizing across production lots |
| fT | 100–300 MHz - allows use in low-noise pre-amplifier stages up to ~100 MHz |
| PD | 200 mW (FR-4, 1 oz Cu) - limits thermal derating to ≤125°C ambient in compact PCB layouts |
| Package | SOT363 - 2.15 mm × 2.10 mm footprint with 0.65 mm pitch, compatible with standard 0402 reflow profiles |
Pinout & Package
SOT363 is a 6-pin ultra-small surface-mount package with gull-wing leads, 0.65 mm pitch, and 0.006 g mass. Molded plastic case meets UL 94V-0 flammability rating and J-STD-020 Level 1 moisture sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NPN Emitter | Common emitter node for NPN half; tied to ground or reference in amplifier configurations |
| 2 | NPN Base | Control input for NPN transistor; requires current-limited drive to avoid saturation delay |
| 3 | NPN Collector | Output node for NPN half; connects to load or pull-up in switching applications |
| 4 | PNP Collector | Output node for PNP half; used for active-low output or complementary switching |
| 5 | PNP Base | Control input for PNP transistor; polarity inverted relative to NPN base |
| 6 | PNP Emitter | Common emitter node for PNP half; typically connected to VCC rail in push-pull stages |
Key Features
| Feature | Design Value |
|---|---|
| Complementary Pair Integration | Matched NPN/PNP characteristics in single SOT363 reduce layout area by 40% vs discrete pairs |
| AEC-Q101 Qualification | Validated for automotive underhood environments including temperature cycling, humidity, and mechanical shock |
| Green Construction | Halogen- and antimony-free molding compound (<900 ppm Br+Cl, <1000 ppm Sb) meets global environmental mandates |
| Thermal Resistance | RθJA = 625°C/W on 1 oz FR-4 - enables operation up to +125°C ambient with 150 mW dissipation |
Applications
| Automotive Door Module Driver | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Driving window lift motor direction control via H-bridge using complementary outputs. IC Role / Device Role / Timing Role: Dual-transistor switch providing bidirectional current path with matched turn-on thresholds. Use Value: Eliminates need for external matching resistors and reduces PCB area by consolidating two transistors into one footprint. | Use Scenario: Amplifying low-level thermocouple or strain gauge signals in noisy factory environments. IC Role / Device Role / Timing Role: Discrete NPN/PNP pair configured as differential amplifier front-end with common-emitter gain staging. Use Value: Symmetric hFE tracking minimizes offset drift over temperature (–40°C to +125°C), improving measurement accuracy. |
| LED Backlight Dimming Circuit | Power Supply Enable Sequencing |
Use Scenario: PWM-controlled constant-current sink for multi-segment LCD backlight arrays. IC Role / Device Role / Timing Role: NPN transistor acts as fast-switching current sink; PNP provides auxiliary bias control. Use Value: fT ≥ 100 MHz ensures clean 1–5 kHz PWM edges with <100 ns rise/fall times, reducing EMI. | Use Scenario: Coordinating power-up sequence of multiple voltage rails in industrial PLC controllers. IC Role / Device Role / Timing Role: Complementary pair implements OR-ing logic and delayed enable gating for 3.3 V/5 V/12 V supplies. Use Value: Matched VCE(sat) ensures consistent timing margins across rail transitions, preventing brown-out faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar complementary BJT applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MBT3904DW1T1G | Lower VCEO (40 V NPN / –40 V PNP); higher hFE spread (100–300) | Not AEC-Q101 qualified; limited to commercial-temperature industrial controls | Select when cost-sensitive non-automotive designs require higher gain but tolerate lower voltage rating. |
| DMBT3906W-7 | Same SOT363 package; PNP-only, no integrated NPN; VCEO = –40 V | Requires external NPN for complementarity; unsuitable for space-constrained dual-rail drivers | Choose only if design already uses discrete NPN and needs PNP replacement with identical footprint. |
Compared with MBT3904DW1T1G and DMBT3906W-7, the MMDT5451Q uniquely delivers automotive-grade voltage capability (160 V/–150 V), integrated complementary pairing, and thermal coupling - making it irreplaceable in AEC-Q101-compliant motor control and power sequencing where reliability and layout efficiency are critical.
Availability
MMDT5451Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and LED driver modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MMDT5451Q 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, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The MMDT5451Q belongs to Diodes' automotive-qualified small-signal transistor product line, engineered specifically for high-reliability switching and amplification in harsh-environment vehicle subsystems such as door modules, lighting, and power management.
FAQ
Is MMDT5451Q pin-compatible with standard SOT363 dual-transistor packages?
Yes - MMDT5451Q uses the industry-standard SOT363 pinout (1: NPN-E, 2: NPN-B, 3: NPN-C, 4: PNP-C, 5: PNP-B, 6: PNP-E), matching JEDEC MO-178AB and Diodes' own MMDT3904/3906 series. No PCB redesign is needed when upgrading from legacy dual BJTs with identical marking orientation.
What is the maximum allowable junction temperature during continuous operation?
The MMDT5451Q has a rated junction temperature range of –55°C to +150°C. Under continuous DC operation at 200 mW dissipation on a 1 oz FR-4 board, junction temperature rises 125°C above ambient - limiting safe continuous operation to ≤25°C ambient unless enhanced cooling or derating is applied.
Does the AEC-Q101 qualification cover both NPN and PNP sections independently?
Yes - AEC-Q101 testing was performed on the fully assembled MMDT5451Q device, including stress tests on both transistors simultaneously. The qualification covers parametric stability, HTOL, TC, and ESD (HBM ≥ 2 kV) for the entire dual-die structure, not just individual sections.
Can MMDT5451Q be used in linear amplifier configurations?
Yes - its hFE consistency (80–250 for NPN, 50–240 for PNP) and fT up to 300 MHz support Class-A and Class-AB audio pre-amplifier stages. However, thermal limitations (200 mW PD) restrict usable output swing to ≤100 mW into 8 Ω loads without heatsinking.
MMDT5451Q-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- 1 NPN, 1 PNP
- Current - Collector (Ic) (Max):
- 200mA
- Voltage - Collector Emitter Breakdown (Max):
- 160V, 150V
- Vce Saturation (Max) @ Ib, Ic:
- 200mV @ 5mA, 50mA / 500mV @ 5mA, 50mA
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 80 @ 10mA, 5V / 60 @ 10mA, 5V
- Power - Max:
- 200mW
- Frequency - Transition:
- 300MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363
MMDT5451Q-7 FAQ
1.How can I place an order for MMDT5451Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMDT5451Q-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 MMDT5451Q-7 reliable?
The price and inventory of MMDT5451Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMDT5451Q-7 is usually 5 days.
3.What payment methods are accepted for MMDT5451Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMDT5451Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMDT5451Q-7?
MMDT5451Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMDT5451Q-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 MMDT5451Q-7?
For technical support, including MMDT5451Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMDT5451Q-7 requirements.
6.How does Aetrix verify that MMDT5451Q-7 is sourced from the original manufacturer or authorized distributors?
All MMDT5451Q-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 MMDT5451Q-7 meets industry standards.
7.What is the process for return or replacement of MMDT5451Q-7?
All MMDT5451Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMDT5451Q-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 MMDT5451Q-7 part is unused and in its original packaging.
Return procedure for MMDT5451Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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