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onsemi MPSW56
- Part No.:
- MPSW56
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
MPSW56.pdf
- Description:
- TRANS PNP 80V 1A TO-226-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,445
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Product details
Overview
MPSW56 from Fairchild Semiconductor is a PNP general-purpose amplifier transistor rated for continuous collector current up to 1.0 A, with VCEO = 80 V and maximum power dissipation of 1.0 W at 25°C. It operates across –55°C to +150°C junction temperature and is commonly used in medium-power linear amplification and switching circuits driving loads up to 800 mA.
For engineers reviewing the MPSW56 datasheet, pinout, applications, or equivalent options, key selection considerations include its TO-226 package configuration, DC current gain (hFE ≥ 100 at IC = 50 mA), VCE(sat) ≤ 0.5 V at IC = 250 mA/IB = 10 mA, and thermal resistance RθJA = 125°C/W on FR-4 PCB.
Technical Context
The MPSW56 is a silicon PNP bipolar junction transistor fabricated using Fairchild's Process 79. Its design emphasizes stable DC current gain over temperature (hFE ≥ 50 at IC = 250 mA) and low saturation voltage for efficient switching operation.
It supports pulsed operation with safe operating area (SOA) defined up to 100 µs pulse width and exhibits fT = 50 MHz at IC = 250 mA/VCE = 5.0 V, enabling use in audio-frequency amplification and moderate-speed switching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 80 V - Maximum allowable collector-emitter voltage before breakdown under open-base conditions. |
| IC (continuous) | 1.0 A - Sustained collector current capability without thermal runaway on standard FR-4 layout. |
| hFE | 100 min @ IC = 50 mA - Ensures reliable base drive sizing for linear amplification stages. |
| VCE(sat) | 0.5 V max @ IC = 250 mA/IB = 10 mA - Limits conduction loss in saturated switch mode. |
| fT | 50 MHz - Supports audio-band amplification and low-MHz digital switching with predictable gain roll-off. |
| RθJA | 125 °C/W - Requires minimum 6 cm² copper pad on FR-4 for full 1.0 W power handling at ambient ≤ 25°C. |
Pinout & Package
Package: TO-226 (also known as TO-92 variant with straight leads), epoxy-molded plastic case. Mounting requires collector lead soldered to ≥6 cm² copper area for thermal performance per datasheet note.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (C) | Main current sink terminal | Electrically and thermally connected to case; must be mounted on large copper pour for heat dissipation. |
| Base (B) | Control input for minority carrier injection | Requires current-limited drive (e.g., 10 mA typical for 250 mA IC) to ensure saturation. |
| Emitter (E) | Current source terminal (PNP) | Connected to higher-potential rail in common-emitter configurations; defines reference for VBE(on) = 1.2 V. |
Key Features
| Feature | Design Value |
|---|---|
| High VCEO/VCB0 | 80 V rating enables use in 48 V industrial control rails and flyback snubber circuits. |
| Low VCE(sat) | ≤ 0.5 V reduces conduction loss in high-current PNP switch applications like relay drivers. |
| Wide TJ range | –55°C to +150°C operation supports deployment in automotive engine compartments and industrial motor controls. |
| Stable hFE vs. temp | hFE ≥ 50 at 250 mA ensures consistent gain across –40°C to +125°C ambient in amplifier designs. |
Applications
| Relay Driver Circuit | Linear Audio Preamp Stage |
|---|---|
Use Scenario: Driving 12 V/500 mA electromagnetic relay coil in PLC output modules. IC Role / Device Role / Timing Role: PNP switch controlling coil current path to ground with fast turn-off via base pull-down. Use Value: VCE(sat) ≤ 0.5 V minimizes power loss (≤250 mW) during sustained activation; 1.0 A IC rating provides margin against inrush. | Use Scenario: Low-noise voltage amplification stage in battery-powered portable audio mixer inputs. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier biased at 50 mA for optimal hFE and fT stability. Use Value: fT = 50 MHz ensures flat gain response up to 20 kHz; low Cob = 15 pF prevents high-frequency instability. |
| DC Motor Direction Control | Overvoltage Protection Clamp |
Use Scenario: Half-H-bridge high-side switch for bidirectional 24 V DC motor control in robotics actuators. IC Role / Device Role / Timing Role: PNP emitter-follower configured to source current to motor upper winding while sinking base current. Use Value: VCEO = 80 V withstands back-EMF spikes; RθJA = 125°C/W allows operation at 70°C ambient with derated power. | Use Scenario: Crowbar-style overvoltage clamp protecting 5 V microcontroller supply rail during load dump events. IC Role / Device Role / Timing Role: PNP transistor triggered into saturation when Zener reference exceeds 4.0 V (VEBO limit), shunting excess current. Use Value: VEBO = 4.0 V sets precise clamping threshold; IC = 1.0 A handles transient surge without second breakdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP general-purpose amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBT5401 | SOT-23 package, lower IC = 600 mA, VCEO = 160 V, RθJA = 300°C/W | Better voltage margin but limited thermal performance; unsuitable for >300 mA continuous loads on PCB without heatsink. | Select when board space is constrained and voltage stress exceeds 80 V, but derate current to ≤300 mA. |
| BC807-40 | SOT-23 package, IC = 500 mA, VCEO = 45 V, hFE = 250–630 (tighter binning) | Higher gain consistency but lower breakdown voltage; not suitable for 48 V bus applications. | Prefer for low-voltage (≤30 V), high-gain linear stages where TO-226 footprint is unavailable. |
Compared with MMBT5401 and BC807-40, the MPSW56 offers superior thermal management in TO-226 and balanced 80 V/1.0 A ratings ideal for industrial relay drivers and medium-power analog circuits where SMT alternatives lack sufficient power handling.
Availability
MPSW56 is available at Aetrix Electronics and suitable for industrial motor controls, relay interface modules, and analog signal conditioning circuits requiring stable component supply and proven legacy reliability.
Supply support for MPSW56 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
Fairchild Semiconductor was a U.S.-based designer and manufacturer of analog and discrete semiconductors, acquired by ON Semiconductor in 2016. Known for robust process technologies and broad portfolio of power transistors.
The MPSW56 belongs to Fairchild's general-purpose bipolar transistor family targeting cost-sensitive, medium-power linear and switching applications in industrial and consumer equipment.
FAQ
What is the maximum continuous collector current rating for the MPSW56?
The MPSW56 is rated for 1.0 A continuous collector current at TA = 25°C with proper PCB thermal management (≥6 cm² copper on collector lead). Derating is required above 25°C per the 8.0 mW/°C specification. At 70°C ambient, usable IC drops to approximately 640 mA. This rating is validated under steady-state conditions-not pulsed operation.
Does the MPSW56 have a documented Safe Operating Area (SOA) curve?
Yes, the MPSW56 datasheet includes a SOA graph covering DC and pulsed operation up to 100 µs. The curve shows limits determined by VCEO, second breakdown, and thermal constraints. For example, at VCE = 40 V, the device supports ≤250 mA continuously or up to 1.0 A for 10 µs pulses. Designers must consult the SOA plot to avoid secondary breakdown in switching applications.
What is the typical current gain (hFE) of the MPSW56 at different operating points?
The MPSW56 specifies hFE ≥ 100 at IC = 50 mA/VCE = 1.0 V and ≥50 at IC = 250 mA/VCE = 1.0 V. Typical pulsed hFE curves show ~180 at 25°C and IC = 10 mA, dropping to ~70 at IC = 500 mA. Gain decreases with rising temperature-designers should use the 50 minimum at 250 mA for worst-case bias calculations in the MPSW56.
Can the MPSW56 be used as a direct replacement for the 2N3906 in existing designs?
No-the MPSW56 is not a drop-in replacement for the 2N3906. While both are PNP transistors, the MPSW56 has higher voltage (80 V vs. 40 V), higher current (1.0 A vs. 200 mA), larger TO-226 package, and different gain profile. Substituting it requires verifying PCB pad layout, thermal design, and drive circuit compatibility. The MPSW56 is physically incompatible with 2N3906 footprints and exceeds 2N3906 specs in key parameters.
What is the thermal resistance from junction to ambient (RθJA) for the MPSW56 under standard test conditions?
The MPSW56 has RθJA = 125°C/W when mounted on an FR-4 PCB measuring 36 mm × 18 mm × 1.5 mm with a minimum 6 cm² copper pad on the collector lead. This value assumes natural convection only-no forced airflow or heatsink. If the copper area is reduced or layout differs, RθJA increases significantly, directly impacting maximum allowable power dissipation in the MPSW56.
MPSW56 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 80 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 10mA, 250mA
- Current - Collector Cutoff (Max):
- 500nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 50 @ 250mA, 1V
- Power - Max:
- 1 W
- Frequency - Transition:
- 50MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-226-3
MPSW56 FAQ
1.How can I place an order for MPSW56 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPSW56 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 MPSW56 reliable?
The price and inventory of MPSW56 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPSW56 is usually 5 days.
3.What payment methods are accepted for MPSW56?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPSW56 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPSW56?
MPSW56 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPSW56 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 MPSW56?
For technical support, including MPSW56 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPSW56 requirements.
6.How does Aetrix verify that MPSW56 is sourced from the original manufacturer or authorized distributors?
All MPSW56 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 MPSW56 meets industry standards.
7.What is the process for return or replacement of MPSW56?
All MPSW56 units undergo pre-shipment inspection (PSI). If there is an issue with MPSW56, 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 MPSW56 part is unused and in its original packaging.
Return procedure for MPSW56:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPSW56 Tags
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