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onsemi MMBT6520LT3G
- Part No.:
- MMBT6520LT3G
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBT6520LT3G.pdf
- Description:
- TRANS PNP 350V 0.5A SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,671
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Product details
Overview
MMBT6520LT3G from onsemi is a high-voltage PNP silicon transistor rated for −350 V collector-emitter and collector-base breakdown, −500 mA continuous collector current, and −250 mA base current. It operates across −55 °C to +150 °C and is used in high-voltage switching circuits such as flyback snubbers, relay drivers, and industrial power supply protection stages.
For engineers reviewing the MMBT6520LT3G datasheet, pinout, applications, or equivalent options, key selection criteria include verified −350 V blocking capability, SOT-23 package thermal derating (2.4 mW/°C on alumina), and AEC-Q101 qualification for automotive-grade reliability validation.
Technical Context
This device is a discrete high-voltage PNP bipolar junction transistor optimized for robust switching in off-line and industrial DC-DC converter auxiliary circuits. Its design emphasizes high VCEO/VCBO rating, low saturation voltage at moderate currents (−0.30 V at −10 mA/−1 mA), and stable hFE of 20–200 across IC = −1.0 to −100 mA.
Thermal performance is defined for two board conditions: FR-5 (225 mW @ 25 °C, 1.8 mW/°C derate) and 99.5% alumina substrate (300 mW @ 25 °C, 2.4 mW/°C derate). Junction-to-ambient thermal resistance is 417 °C/W on alumina, enabling higher power density in thermally constrained layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −350 Vdc - supports direct connection to 277 VAC line-derived rails with safety margin |
| IC Continuous | −500 mAdc - enables driving medium-power loads like solenoids or optocoupler LEDs |
| VCE(sat) | −0.30 V @ −10 mA/−1 mA - minimizes conduction loss in high-side switch configurations |
| fT | 40–200 MHz - sufficient for kHz-range switching control, not RF amplification |
| Ccb | ≤6.0 pF @ −20 V - limits Miller feedback in fast-switching applications |
| hFE | 20–200 @ −1 to −100 mA - provides predictable base drive requirements across operating range |
| TJ Range | −55 °C to +150 °C - qualified for under-hood automotive and industrial ambient environments |
Pinout & Package
SOT-23 (TO-236) package, 2.90 × 1.30 × 1.00 mm, case 318 style 6. Marking "2ZM" denotes MMBT6520LT3G; Pb-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control input; requires negative bias relative to emitter to turn on |
| 2 | Emiter | Common reference terminal; connected to positive rail in high-side switch topology |
| 3 | Collector | Switched output node; sinks current when device is active |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive temperature cycling, HTRB, and ESD per stress test plan |
| −350 V breakdown rating | Enables use in 277 VAC-derived auxiliary supplies without external clamping |
| Pb-free, Halogen-free, RoHS compliant | Meets global environmental compliance mandates for industrial and automotive end equipment |
| Low VCE(sat) at 10× overdrive | Reduces power dissipation in saturated switching mode, improving thermal margin |
| Alumina-substrate RJA = 417 °C/W | Supports 300 mW dissipation at 25 °C ambient-25% higher than standard FR-5 layout |
Applications
| Industrial Power Supply Snubber | Automotive Relay Driver |
|---|---|
Use Scenario: Clamp voltage spikes during MOSFET turn-off in flyback converters. IC Role / Device Role / Timing Role: High-voltage PNP switch absorbing transient energy into RC network. Use Value: −350 V VCEO withstands reflected primary spikes without avalanche stress or failure. |
Use Scenario: Drive 12 V/24 V automotive relays requiring high-side sourcing. IC Role / Device Role / Timing Role: Saturated PNP switch controlling relay coil current path. Use Value: −500 mA IC and −0.30 V VCE(sat) ensure reliable coil activation with <150 mW conduction loss. |
| High-Voltage Signal Isolation | Programmable Load Switch |
Use Scenario: Level-shift and isolate logic signals referenced to >200 V rails. IC Role / Device Role / Timing Role: Inverting level translator with high common-mode rejection. Use Value: −350 V VCBO and ≤50 nA ICBO maintain signal integrity under sustained high-voltage bias. |
Use Scenario: Enable/disable power to peripheral modules in programmable industrial controllers. IC Role / Device Role / Timing Role: Controlled high-side switch with defined turn-on/turn-off timing. Use Value: 40–200 MHz fT and ns-scale tr/tf support clean enable sequencing up to 100 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage PNP switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC807-40LT1G | Lower VCEO = −45 V; higher hFE = 250 min; same SOT-23 package | Not suitable for >100 V systems; limited to low-voltage logic-level switching | Select only where system voltage remains below 40 V and higher gain is prioritized over voltage rating |
| PN2907A | TO-92 package; VCEO = −60 V; PD = 625 mW; no AEC-Q101 qualification | Larger footprint; unsuitable for automated SMT assembly or automotive qualification requirements | Choose only for prototyping or legacy through-hole designs where thermal mass outweighs board space constraints |
Compared with BC807-40LT1G and PN2907A, the MMBT6520LT3G uniquely delivers −350 V blocking in an SMT-optimized SOT-23 package with automotive-grade reliability-making it the only viable option for compact, high-voltage, production-ready switching in industrial and automotive auxiliary power stages.
Availability
MMBT6520LT3G is available at Aetrix Electronics and suitable for industrial power supply snubbers, automotive relay drivers, and high-voltage signal isolation circuits requiring stable component supply and long-term lifecycle assurance.
Supply support for MMBT6520LT3G 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The MMBT6520LT3G belongs to onsemi's high-voltage discrete transistor family, engineered specifically for ruggedized switching in off-line power conversion, motor control, and automotive body electronics where voltage endurance and thermal reliability are critical.
FAQ
What is the maximum collector-emitter voltage rating for MMBT6520LT3G?
The MMBT6520LT3G has a guaranteed minimum V(BR)CEO of −350 Vdc at IC = −1.0 mA, confirmed per onsemi datasheet Rev. 8. This rating applies under static DC conditions and defines the absolute maximum reverse-biased voltage the device can block before breakdown. Exceeding this voltage risks irreversible damage.
Is MMBT6520LT3G suitable for automotive applications?
Yes, the MMBT6520LT3G is AEC-Q101 qualified and PPAP capable, with full stress test documentation including temperature cycling, HTRB, and ESD. The NSV prefix variant (NSVMMBT6520LT1G) explicitly targets automotive applications, and the MMBT6520LT3G shares identical electrical and thermal specifications and qualification status.
What is the pin configuration of MMBT6520LT3G in the SOT-23 package?
The MMBT6520LT3G uses SOT-23 case 318 style 6: Pin 1 is Base, Pin 2 is Emitter, and Pin 3 is Collector. This configuration is confirmed in the mechanical drawings and marking diagram of the official onsemi datasheet, and differs from style 7 (Emitter/Base/Collector) and other SOT-23 variants.
Does MMBT6520LT3G have lead-free and RoHS compliance?
Yes, MMBT6520LT3G is Pb-free, halogen-free/BFR-free, and fully RoHS compliant, as stated in the Features section of the onsemi datasheet. The "G" suffix denotes lead-free packaging, and the device carries the microdot or "G" marking per onsemi's generic marking diagram for Pb-free SOT-23 devices.
What is the typical DC current gain (hFE) of MMBT6520LT3G at different collector currents?
The MMBT6520LT3G exhibits hFE = 20–200 depending on operating point: min 20 at IC = −100 mA, min 30 at IC = −30 mA, min 30 at IC = −10 mA, and min 20 at IC = −1.0 mA-all measured at VCE = −10 V and TA = 25 °C. These values are specified in the Electrical Characteristics table of the official datasheet.
MMBT6520LT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 350 V
- Vce Saturation (Max) @ Ib, Ic:
- 1V @ 5mA, 50mA
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 20 @ 50mA, 10V
- Power - Max:
- 225 mW
- Frequency - Transition:
- 200MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBT6520LT3G FAQ
1.How can I place an order for MMBT6520LT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBT6520LT3G 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 MMBT6520LT3G reliable?
The price and inventory of MMBT6520LT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBT6520LT3G is usually 5 days.
3.What payment methods are accepted for MMBT6520LT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBT6520LT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBT6520LT3G?
MMBT6520LT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBT6520LT3G 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 MMBT6520LT3G?
For technical support, including MMBT6520LT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBT6520LT3G requirements.
6.How does Aetrix verify that MMBT6520LT3G is sourced from the original manufacturer or authorized distributors?
All MMBT6520LT3G 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 MMBT6520LT3G meets industry standards.
7.What is the process for return or replacement of MMBT6520LT3G?
All MMBT6520LT3G units undergo pre-shipment inspection (PSI). If there is an issue with MMBT6520LT3G, 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 MMBT6520LT3G part is unused and in its original packaging.
Return procedure for MMBT6520LT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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