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Diodes Incorporated FMMT451TC
- Part No.:
- FMMT451TC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
FMMT451TC.pdf
- Description:
- TRANS NPN 60V 1A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,952
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Product details
Overview
FMMT451TC from Diodes Incorporated is a 60V NPN medium-power transistor in SOT23 package, rated for 1A continuous collector current, 2A peak pulse current, and 500mW power dissipation; it serves as a general-purpose switching and amplification device in automotive power management, industrial sensor interfaces, and LED driver stages.
For engineers reviewing the FMMT451TC datasheet, FMMT451TC pinout, FMMT451TC application, or FMMT451TC equivalent, key selection criteria include VCEO = 60V, hFE = 50–150 at IC = 150mA, VCE(sat) ≤ 0.35V, thermal resistance RθJA = 250°C/W, and AEC-Q101 qualification for high-reliability environments.
Technical Context
This NPN bipolar junction transistor operates with a minimum DC current gain (hFE) of 50 at IC = 150mA and VCE = 10V, rising to 100 typical under same conditions; its 150MHz transition frequency (fT) supports medium-speed switching up to ~10MHz in practical designs.
Designed for surface-mount use on FR4 PCBs with 15mm × 15mm 1oz copper, it delivers 500mW steady-state dissipation only when ambient temperature remains ≤70°C-derating linearly to zero at 150°C per the published curve-and exhibits 4kV HBM ESD robustness for handling in automated assembly lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration |
| IC (continuous) | 1 A - Sustained collector current without thermal runaway on standard PCB layout |
| PD | 500 mW - Max steady-state power dissipation at TA = 25°C with specified copper area |
| hFE | 50–150 - DC current gain range enabling predictable base drive sizing for switching |
| fT | 150 MHz - Transition frequency indicating usable bandwidth for small-signal amplification |
| RθJA | 250 °C/W - Junction-to-ambient thermal resistance defining temperature rise per watt dissipated |
| VCE(sat) | ≤0.35 V - Low saturation voltage at IC = 150mA/IB = 15mA, minimizing conduction loss |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with 3-pin leadframe, 0.008g mass, UL 94V-0 flammability rating, and matte tin-plated leads compliant with MIL-STD-202 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | E | Current return path; connected to ground or low-side reference in switch configurations |
| 2 (Base) | B | Control input requiring ~15mA drive for full saturation at 150mA collector load |
| 3 (Collector) | C | High-side output node; handles up to 60V and 1A with defined thermal path to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTOL, and ESD stress |
| Lead-free & "Green" | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meeting RoHS 2 |
| Low VCE(sat) | ≤0.35V ensures <53mW conduction loss at 150mA, reducing heat generation in dense layouts |
| High fT | 150MHz enables stable operation in PWM dimming circuits and signal buffering up to 10MHz |
| Moisture sensitivity Level 1 | No bake required before reflow; compatible with standard J-STD-020 assembly processes |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Driving resistive loads such as door lock actuators and HVAC damper motors in 12V vehicle systems. IC Role / Device Role / Timing Role: NPN switch controlling ground-return path with fast turn-on/off enabled by 150MHz fT. Use Value: 60V VCEO withstands load-dump transients; AEC-Q101 rating ensures 15-year field reliability. | Use Scenario: Amplifying low-level analog outputs from pressure or temperature sensors before ADC sampling. IC Role / Device Role / Timing Role: Linear amplifier stage with hFE = 50–150 providing stable current gain at 150mA bias point. Use Value: Low VCE(sat) minimizes offset error; 250°C/W RθJA allows thermal stability on compact sensor PCBs. |
| LED Driver for Smart Lighting | Power Supply Enable Switch |
Use Scenario: Constant-current switching for high-brightness white LEDs in architectural lighting fixtures. IC Role / Device Role / Timing Role: Medium-power switch modulating LED string current via PWM at up to 10kHz. Use Value: 1A IC supports multi-LED strings; 500mW PD permits direct mounting without heatsink in thermally optimized layouts. | Use Scenario: Enabling/disabling auxiliary rails (e.g., 5V standby or 3.3V logic) in AC-DC adapters and PoE injectors. IC Role / Device Role / Timing Role: High-side or low-side enable switch with fast response governed by fT and low Cobo = 15pF. Use Value: 4kV HBM ESD rating prevents latch-up during hot-plug events; SOT23 footprint saves board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN2012ZTA | VCEO = 60V, IC = 1.5A, but RθJA = 200°C/W and no AEC-Q101 qualification | Suitable for commercial-grade power switching where automotive reliability is not required | Select when higher continuous current is needed and thermal margin allows lower RθJA benefit |
| MMBT4401 | VCEO = 40V, IC = 600mA, hFE = 100–300, no AEC-Q101 or green compliance | Applicable in low-voltage consumer electronics with less stringent reliability demands | Choose only for cost-sensitive non-automotive designs where 40V rating suffices |
Compared with ZXTN2012ZTA and MMBT4401, FMMT451TC uniquely combines AEC-Q101 qualification, 60V rating, RoHS/Green compliance, and SOT23 thermal performance-making it the preferred choice for automotive and industrial applications demanding long-term reliability and regulatory alignment.
Availability
FMMT451TC is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, LED driver circuits, and power supply enable functions requiring stable component supply across production lifecycles.
Supply support for FMMT451TC 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 and manufacturing operations across Asia and the Americas.
FMMT451TC belongs to Diodes' FMMT series of high-reliability SOT23 transistors, engineered specifically for automotive and industrial applications requiring AEC-Q101 validation, thermal robustness, and green material compliance.
FAQ
What is the maximum operating temperature for FMMT451TC?
The FMMT451TC has an operating junction temperature range of –55°C to +150°C. Its maximum ambient temperature depends on power dissipation: at 500mW, ambient must stay ≤70°C on a 15mm × 15mm 1oz copper PCB; derating follows a linear curve to zero dissipation at +150°C ambient.
Is FMMT451TC pin-compatible with other SOT23 NPN transistors?
FMMT451TC uses standard SOT23 pinout (Emitter-Base-Collector on pins 1-2-3), matching industry convention. However, electrical parameters-including VCEO, hFE, and thermal resistance-differ from generic SOT23 NPNs like MMBT4401, so functional substitution requires circuit-level verification.
Does FMMT451TC require special handling during reflow soldering?
No special handling is required: FMMT451TC has Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and placed directly into standard lead-free reflow profiles without baking or dry-packaging.
What complementary PNP transistor pairs with FMMT451TC?
The officially designated complementary PNP is FMMT551, sharing identical SOT23 package, AEC-Q101 qualification, 60V VCEO, 1A IC, and matched thermal characteristics-enabling balanced push-pull or H-bridge designs without thermal mismatch concerns.
FMMT451TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 350mV @ 15mA, 150mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 50 @ 150mA, 10V
- Power - Max:
- 500 mW
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
FMMT451TC FAQ
1.How can I place an order for FMMT451TC through Aetrix?
Please submit a Request for Quotation (RFQ) for FMMT451TC 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 FMMT451TC reliable?
The price and inventory of FMMT451TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FMMT451TC is usually 5 days.
3.What payment methods are accepted for FMMT451TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FMMT451TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FMMT451TC?
FMMT451TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FMMT451TC 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 FMMT451TC?
For technical support, including FMMT451TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FMMT451TC requirements.
6.How does Aetrix verify that FMMT451TC is sourced from the original manufacturer or authorized distributors?
All FMMT451TC 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 FMMT451TC meets industry standards.
7.What is the process for return or replacement of FMMT451TC?
All FMMT451TC units undergo pre-shipment inspection (PSI). If there is an issue with FMMT451TC, 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 FMMT451TC part is unused and in its original packaging.
Return procedure for FMMT451TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FMMT451TC Tags
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