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onsemi MSB92ASWT1
- Part No.:
- MSB92ASWT1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MSB92ASWT1.pdf
- Description:
- TRANS PNP 300V 0.5A SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,567
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Product details
Overview
MSB92ASWT1 from onsemi is a PNP silicon planar transistor designed for general-purpose amplifier applications, featuring −300 V collector-emitter breakdown voltage (V(BR)CEO), 500 mA continuous collector current (IC), 150 mW power dissipation (PD), and SC-70 (SOT-323) surface-mount packaging. It operates in high-voltage industrial signal conditioning and relay driver circuits where robust reverse-biased junction integrity is required.
For engineers reviewing the MSB92ASWT1 datasheet, pinout, applications, or equivalent options, key selection criteria include verified high-voltage PNP switching capability, SC-70 thermal derating behavior, ESD Class 1C rating, and discontinuation status requiring legacy design support planning.
Technical Context
This device is a discrete PNP bipolar junction transistor with planar construction optimized for stable DC amplification and moderate-speed switching up to 50 MHz fT. Its −300 V ratings across both V(BR)CBO and V(BR)CEO enable operation in high-side switch configurations with elevated supply rails.
The SC-70 package imposes strict thermal limits: 150 mW maximum power dissipation at TA = 25°C with FR-4 mounting, and junction temperature must remain ≤150°C. Cutoff currents (ICBO ≤ −0.25 µA, IEBO ≤ −0.1 µA) confirm low leakage under high reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| V(BR)CEO | −300 Vdc - supports high-voltage collector rail operation without avalanche breakdown |
| IC (continuous) | 500 mAdc - enables driving medium-current loads such as small relays or indicator LEDs |
| PD (TA = 25°C) | 150 mW - requires thermal-aware PCB layout with minimum copper footprint per datasheet note 1 |
| hFE @ IC = −10 mA | 40–200 - provides predictable current amplification in linear amplifier stages |
| fT | 50 MHz - suitable for audio-frequency amplification and sub-MHz switching |
| Ccb | ≤6.0 pF - minimizes Miller effect in high-gain common-emitter configurations |
| VCE(sat) | ≤−0.5 Vdc @ IC = −20 mA, IB = −2 mA - ensures low conduction loss in saturated switch mode |
Pinout & Package
MSB92ASWT1 is housed in the SC-70 (SOT-323) plastic surface-mount package (Case 419, Style 3), measuring 2.2 mm × 2.2 mm × 0.95 mm with gull-wing leads. Thermal performance assumes FR-4 board mounting using the manufacturer's minimum recommended footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal for forward-biased PNP operation; requires negative base current relative to emitter |
| 2 | Emitter | Current source terminal; connected to higher potential in typical high-side switch configuration |
| 3 | Collector | Current sink terminal; handles −300 V reverse bias and 500 mA continuous current |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free, Halogen Free/BFR Free | Meets RoHS Directive 2011/65/EU and JEDEC JS709C material compliance requirements |
| ESD Rating | Class 1C (Human Body Model) - withstands ≥2 kV discharge without parametric shift |
| High-Voltage Junction Isolation | Simultaneous −300 V V(BR)CBO and V(BR)CEO - enables use in floating high-side topologies |
| Low Leakage Performance | ICBO ≤ −0.25 µA at VCB = −300 V - preserves signal integrity in high-impedance bias networks |
| SC-70 Thermal Profile | 150°C max junction temperature with defined FR-4 mounting - constrains layout but enables compact placement |
Applications
| Industrial Relay Drivers | High-Voltage Signal Conditioning |
|---|---|
Use Scenario: Driving 24–48 VDC industrial relays in programmable logic controller (PLC) output modules. IC Role / Device Role / Timing Role: PNP high-side switch controlling relay coil current path with emitter tied to positive rail. Use Value: −300 V V(BR)CEO prevents breakdown during inductive kickback transients exceeding 200 V. | Use Scenario: Amplifying low-level sensor signals in high-common-mode-voltage environments (e.g., motor phase current sensing). IC Role / Device Role / Timing Role: DC-coupled PNP amplifier stage referenced to elevated common-mode potential. Use Value: Low ICBO (≤−0.25 µA) maintains gain stability despite −300 V collector bias. |
| Legacy Power Supply Feedback | High-Voltage Level Translation |
Use Scenario: Isolating and translating error amplifier output in discontinued flyback controllers with >200 V primary-side rails. IC Role / Device Role / Timing Role: Linear-mode current mirror or level-shifting transistor in optocoupler feedback path. Use Value: hFE range of 40–200 at −10 mA ensures predictable current transfer ratio under varying load conditions. | Use Scenario: Converting TTL/CMOS logic levels to −200 V referenced control signals for vacuum tube grid drivers or HV MOSFET gate pre-drivers. IC Role / Device Role / Timing Role: Inverting level translator with emitter at −200 V rail and collector pulled to system ground. Use Value: V(BR)EBO = −5.0 Vdc allows safe base-emitter biasing while maintaining full −300 V collector swing. |
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 |
|---|---|---|---|
| MPSA92 | Same −300 V V(BR)CEO, but TO-92 package (higher PD = 625 mW); hFE min 25 vs. 40 | Requires through-hole PCB layout; better thermal headroom but larger footprint | Select when board space permits and higher power dissipation is needed |
| ZTX951 | −300 V V(BR)CEO, SC-70 package, but hFE min 100 and fT = 100 MHz; Pb-free compliant | Higher gain-bandwidth product supports faster switching; tighter hFE distribution | Select when improved AC response or tighter DC gain tolerance is required |
Compared with MSB92ASWT1, MPSA92 offers greater thermal margin in through-hole designs, while ZTX951 delivers superior high-frequency performance and gain consistency in the same SC-70 footprint-both require validation of base drive compatibility and SOA boundaries in target circuits.
Availability
MSB92ASWT1 is available at Aetrix Electronics and suitable for industrial relay drivers, high-voltage signal conditioning, and legacy power supply feedback circuits requiring stable component supply and long-term obsolescence management.
Supply support for MSB92ASWT1 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 delivering energy-efficient power and signal management solutions for automotive, industrial, cloud, medical, and IoT applications.
The MSB92ASWT1 belongs to onsemi's general-purpose high-voltage bipolar transistor product line, engineered specifically for reliability-critical industrial control and legacy system maintenance where −300 V PNP switching capability in miniature packages is essential.
FAQ
Is MSB92ASWT1 still in active production?
No, MSB92ASWT1 is marked "DISCONTINUED" in the official onsemi datasheet (Rev. 7, November 2024). It is not recommended for new designs. However, Aetrix Electronics maintains legacy inventory and supports ongoing production for existing systems requiring this exact PNP high-voltage transistor specification and SC-70 footprint.
What is the correct pinout configuration for MSB92ASWT1 in SC-70 package?
The MSB92ASWT1 uses SC-70 Style 3 pinout: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector. This is confirmed in the mechanical case outline diagram (CASE 419, STYLE 3) and marking diagram on page 4 of the onsemi datasheet. Do not substitute with Style 6 or Style 7 variants unless explicitly validated.
Can MSB92ASWT1 replace MPSA92 in existing designs?
MSB92ASWT1 cannot serve as a direct drop-in replacement for MPSA95 due to package and thermal differences: MSB92ASWT1 is SC-70 (150 mW PD), while MPSA92 is TO-92 (625 mW PD). Electrical parameters align closely (−300 V ratings, similar hFE), but PCB layout, thermal relief, and current drive capability must be re-evaluated before substitution in any design using MSB92ASWT1.
What does the "G" suffix in MSB92ASWT1G indicate?
Per onsemi ordering information, the "G" suffix in MSB92ASWT1G denotes Pb-free (lead-free) packaging compliant with RoHS Directive 2011/65/EU. The device also meets halogen-free and BFR-free requirements. This marking appears on the physical package as either the letter "G" or a microdot, though its presence is not guaranteed on all units per the generic marking diagram.
What is the maximum safe operating collector current for MSB92ASWT1 at 85°C ambient?
At TA = 85°C, the MSB92ASWT1's maximum continuous collector current must be derated from 500 mA. Using the datasheet's thermal resistance estimate (RθJA ≈ 833°C/W for SC-70 on FR-4), allowable power drops to ~90 mW, limiting IC to approximately 300 mA at VCE = −10 V to stay within SOA limits. Always consult Figure 8 (Safe Operating Area) in the MSB92ASWT1 datasheet for precise boundary validation.
MSB92ASWT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 300 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 2mA, 20mA
- Current - Collector Cutoff (Max):
- 250nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 120 @ 1mA, 10V
- Power - Max:
- 150 mW
- Frequency - Transition:
- 50MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3 (SOT323)
MSB92ASWT1 FAQ
1.How can I place an order for MSB92ASWT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MSB92ASWT1 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 MSB92ASWT1 reliable?
The price and inventory of MSB92ASWT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSB92ASWT1 is usually 5 days.
3.What payment methods are accepted for MSB92ASWT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSB92ASWT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSB92ASWT1?
MSB92ASWT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSB92ASWT1 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 MSB92ASWT1?
For technical support, including MSB92ASWT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSB92ASWT1 requirements.
6.How does Aetrix verify that MSB92ASWT1 is sourced from the original manufacturer or authorized distributors?
All MSB92ASWT1 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 MSB92ASWT1 meets industry standards.
7.What is the process for return or replacement of MSB92ASWT1?
All MSB92ASWT1 units undergo pre-shipment inspection (PSI). If there is an issue with MSB92ASWT1, 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 MSB92ASWT1 part is unused and in its original packaging.
Return procedure for MSB92ASWT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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