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onsemi MMBTA93LT1
- Part No.:
- MMBTA93LT1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBTA93LT1.pdf
- Description:
- TRANS PNP 200V 0.5A SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,582
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Product details
Overview
MMBTA93LT1 from onsemi is a PNP silicon small-signal transistor optimized for high-voltage switching and amplification, with VCEO = −200 V, VCBO = −200 V, IC = −500 mA, hFE ≥ 25 at IC = −10 mA, and VCE(sat) ≤ −0.5 V at IC/IB = 10 - used in high-side load switches and HV bias networks.
For engineers reviewing the MMBTA93LT1 datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage margin, saturation voltage under defined drive conditions, thermal derating on FR-5 vs. alumina substrates, and SOT-23 terminal assignment consistency across ON Semiconductor's MMBTA9x family.
Technical Context
This device operates as a discrete PNP bipolar junction transistor with fixed-emitter configuration, requiring external base current control to achieve collector current conduction. Its high VCEO and VCBO ratings support use in circuits where collector-to-emitter or collector-to-base reverse voltages exceed standard low-voltage transistors.
Thermal performance is specified for two mounting conditions: 225 mW on FR-5 board (derating 1.8 mW/°C above 25°C) and 300 mW on 99.5% alumina substrate (derating 2.4 mW/°C), reflecting distinct RJA values of 556 °C/W and 417 °C/W respectively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −200 Vdc - supports operation in circuits with up to 200 V collector-to-emitter reverse bias without breakdown |
| IC | −500 mAdc continuous - enables switching or amplifying loads up to 500 mA with appropriate base drive |
| hFE | ≥25 at IC = −10 mA, VCE = −10 V - defines minimum DC current gain for predictable base current sizing |
| VCE(sat) | ≤ −0.5 V at IC = −20 mA, IB = −2.0 mA - ensures low conduction loss when fully saturated |
| Ccb | 8.0 pF at VCB = −20 V, f = 1 MHz - impacts high-frequency response and stability in amplifier or oscillator designs |
| fT | 50 MHz at IC = −10 mA, VCE = −20 V - sets upper limit for useful small-signal amplification bandwidth |
Pinout & Package
MMBTA93LT1 is housed in a standard SOT-23 (TO-236AF) package, case outline 318-08, with gull-wing leads and JEDEC-compliant footprint. Thermal and electrical performance data assume mounting on either FR-5 or 99.5% alumina substrates per datasheet notes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Current-controlled input node; requires negative bias relative to emitter to forward-bias base-emitter junction |
| 2 | Emitter | Common reference terminal; connected to higher potential in PNP high-side switch configurations |
| 3 | Collector | Output current terminal; carries −500 mA max continuous current when saturated or active |
Key Features
| Feature | Design Value |
|---|---|
| High VCEO rating | −200 V enables use in off-line auxiliary supplies and HV sensing interfaces without cascading devices |
| Pb-free SOT-23 packaging | RoHS-compliant construction with standard tape-and-reel delivery (3000 units/reel) |
| Controlled VCE(sat) | ≤ −0.5 V at IC/IB = 10 ensures predictable power dissipation in switching applications |
| Marking code "2E" | Uniquely identifies MMBTA93LT1 on device top surface for traceability and assembly verification |
Applications
| Industrial Power Supply Bias Networks | Automotive HVAC Blower Control |
|---|---|
Use Scenario: Providing stable base drive to series-pass PNP transistors in 12–48 V auxiliary power rails. IC Role / Device Role / Timing Role: Discrete PNP switch regulating current into primary bias network of linear regulators. Use Value: −200 V VCEO withstands transient spikes during load dump events without failure. | Use Scenario: Controlling ground-return path for blower motor via microcontroller GPIO. IC Role / Device Role / Timing Role: High-side driver enabling PWM-compatible on/off control of 24 V DC motor. Use Value: ≤ −0.5 V VCE(sat) limits conduction loss to <10 mW at 20 mA load, minimizing thermal rise. |
| Telecom Line Interface Protection | Programmable Current Sink for Sensor Excitation |
Use Scenario: Clamping overvoltage transients on analog signal lines using active crowbar topology. IC Role / Device Role / Timing Role: Fast-turn-on PNP element triggered by comparator output during fault detection. Use Value: 50 MHz fT supports sub-microsecond response to line surges up to ±200 V. | Use Scenario: Delivering precise 1–10 mA excitation current to RTD or bridge sensors. IC Role / Device Role / Timing Role: Constant-current sink configured with emitter resistor and op-amp feedback. Use Value: hFE ≥25 ensures stable current regulation across temperature (−55°C to +125°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP high-voltage transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZTX951 | VCEO = −250 V, IC = −1 A, SOT-23 package, hFE = 100–300 | Higher voltage margin and current capability; wider hFE spread affects base drive design | Preferred where >200 V standoff or >500 mA load current is required |
| BC807-25 | VCEO = −45 V, IC = −500 mA, same SOT-23 footprint, hFE = 160–400 | Lower voltage rating but tighter hFE tolerance and lower VCE(sat) (~−0.3 V) | Suitable only in sub-45 V systems where gain consistency and ultra-low saturation loss are critical |
Compared with ZTX951 and BC807-25, MMBTA93LT1 offers balanced trade-offs: sufficient −200 V rating for industrial HV interfaces, predictable −0.5 V saturation behavior, and standardized SOT-23 layout - making it optimal for cost-sensitive, thermally constrained designs needing verified reliability across −55°C to +150°C.
Availability
MMBTA93LT1 is available at Aetrix Electronics and suitable for industrial power supply bias networks, automotive HVAC blower control, telecom line interface protection, and programmable sensor excitation circuits requiring stable component supply and long-term manufacturability.
Supply support for MMBTA93LT1 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
The MMBTA9x family was designed specifically for high-voltage discrete switching and amplification in space-constrained PCB layouts, emphasizing robustness, thermal predictability, and compatibility with automated SMT assembly.
FAQ
What is the maximum collector-emitter voltage rating for MMBTA93LT1?
The MMBTA93LT1 has a maximum collector-emitter voltage rating (VCEO) of −200 Vdc, tested at IC = −1.0 mAdc with IB = 0. This rating defines the highest reverse-biased voltage the device can block between collector and emitter before breakdown occurs, and is validated per the May 2005 Rev. 5 datasheet from onsemi.
Is MMBTA93LT1 RoHS compliant and what package does it use?
Yes, MMBTA93LT1 is RoHS compliant and supplied in the Pb-free SOT-23 (TO-236AF) package, case 318-08. The device marking "2E" appears on the top surface, and it ships in tape-and-reel format with 3000 units per reel, as confirmed in the official onsemi ordering information table.
What is the DC current gain (hFE) range for MMBTA93LT1 under typical operating conditions?
The MMBTA93LT1 exhibits hFE ≥ 25 at IC = −10 mAdc and VCE = −10 Vdc, with no upper limit specified in the datasheet. At IC = −1.0 mAdc, hFE is also ≥25, and at IC = −30 mAdc, the minimum remains ≥25 - confirming consistent gain behavior across its rated current range.
How does thermal performance differ between FR-5 and alumina substrates for MMBTA93LT1?
On FR-5 board, MMBTA93LT1 delivers 225 mW at TA = 25°C with 1.8 mW/°C derating; on 99.5% alumina, it provides 300 mW at TA = 25°C with 2.4 mW/°C derating. This reflects RJA values of 556 °C/W and 417 °C/W respectively - meaning alumina improves thermal resistance by ~25%, critical for high-ambient or high-duty-cycle operation.
Can MMBTA93LT1 be used as a direct replacement for MMBTA92LT1 in existing designs?
No - while both share the same SOT-23 package and pinout, MMBTA93LT1 has VCEO = −200 V versus MMBTA92LT1's −300 V, and Ccb = 8.0 pF versus 6.0 pF. Substituting MMBTA93LT1 in a −300 V application risks premature breakdown; system-level validation of voltage margin and capacitance impact is required before interchange.
MMBTA93LT1 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):
- 200 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 2mA, 20mA
- Current - Collector Cutoff (Max):
- 250nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 25 @ 30mA, 10V
- Power - Max:
- 300 mW
- Frequency - Transition:
- 50MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBTA93LT1 FAQ
1.How can I place an order for MMBTA93LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBTA93LT1 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 MMBTA93LT1 reliable?
The price and inventory of MMBTA93LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBTA93LT1 is usually 5 days.
3.What payment methods are accepted for MMBTA93LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBTA93LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBTA93LT1?
MMBTA93LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBTA93LT1 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 MMBTA93LT1?
For technical support, including MMBTA93LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBTA93LT1 requirements.
6.How does Aetrix verify that MMBTA93LT1 is sourced from the original manufacturer or authorized distributors?
All MMBTA93LT1 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 MMBTA93LT1 meets industry standards.
7.What is the process for return or replacement of MMBTA93LT1?
All MMBTA93LT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBTA93LT1, 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 MMBTA93LT1 part is unused and in its original packaging.
Return procedure for MMBTA93LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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