My Inquiry
My Account
onsemi MPSA92_D81Z
- Part No.:
- MPSA92_D81Z
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
MPSA92_D81Z.pdf
- Description:
- TRANS PNP 300V 0.5A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,787
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPSA92_D81Z from Fairchild Semiconductor is a PNP high-voltage general-purpose amplifier transistor designed for driver-stage amplification in high-voltage linear and switching applications, featuring VCEO = 300 V, IC = 500 mA, and fT = 50 MHz - commonly deployed in flyback converter gate drivers, relay drivers, and high-side switch circuits.
For engineers reviewing the MPSA92_D81Z datasheet, pinout, applications, or equivalent options, this page delivers verified package mapping (TO-92), confirmed PNP polarity and saturation behavior, thermal derating curves, and validated alternative options for high-voltage discrete amplifier selection.
Technical Context
This device operates as a silicon PNP bipolar junction transistor with negative-polarity voltage/current ratings, optimized for high-voltage amplification where collector-emitter breakdown exceeds 300 V and junction temperature spans −55°C to +150°C. Its DC current gain (hFE) ranges from 25 to 40 across 1–30 mA collector currents at VCE = 10 V.
The MPSA92_D81Z exhibits VCE(sat) ≤ 0.5 V at IC = 20 mA / IB = 2.0 mA and VBE(sat) ≤ 0.9 V under identical conditions, with Ccb = 6.0 pF at VCB = 20 V and f = 1 MHz - enabling stable operation in medium-frequency switching and analog amplification stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 300 V - supports operation in circuits with up to 300 V collector-to-emitter potential without breakdown. |
| IC (continuous) | 500 mA - enables driving moderate-current loads such as relays, small solenoids, or logic-level interfaces. |
| fT | 50 MHz - provides usable gain-bandwidth for audio-frequency amplification and low-MHz switching control loops. |
| VCE(sat) | ≤ 0.5 V at IC = 20 mA / IB = 2.0 mA - ensures low conduction loss in saturated-switching configurations. |
| RθJA | 200 °C/W (TO-92) - defines thermal limit for ambient-operated PCB mounting without heatsink. |
| hFE | 25–40 at IC = 1–30 mA - specifies predictable DC gain range for bias network design in amplifier stages. |
| PD | 625 mW at TA = 25°C - sets maximum power dissipation before thermal derating begins. |
Pinout & Package
Package: TO-92 (standard through-hole plastic package per Fairchild specification; lead form: straight, no clip; marking: "MPSA92" or "2D" per reel code D81Z).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E (Emitter) | Current source terminal for PNP operation | Connected to higher-potential rail in high-side switch or common-base amplifier configurations. |
| B (Base) | Control input for minority-carrier injection | Receives negative-biased current to turn on; requires current-limiting resistor in series with VCC. |
| C (Collector) | Current sink terminal | Connected to load and high-voltage supply; carries full output current with 300 V standoff capability. |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage PNP architecture | Enables direct replacement of legacy high-voltage PNP transistors (e.g., 2N2907A) in legacy industrial controls. |
| 300 V VCEO rating | Supports use in offline AC/DC auxiliary supplies and flyback snubber circuits without external clamping. |
| TO-92 package with 200 °C/W RθJA | Permits cost-effective through-hole assembly and manual prototyping without thermal vias or heatsinks. |
| 50 MHz fT | Allows stable operation in audio preamplifier stages and PWM gate drive signal conditioning up to ~5 MHz. |
| Low VCE(sat) (0.5 V) | Reduces conduction losses in saturated-switching applications, improving efficiency in relay and lamp drivers. |
Applications
| Relay Driver Circuit | Flyback Converter Gate Driver |
|---|---|
Use Scenario: Driving 12–24 V DC relays in PLC I/O modules requiring isolation and high-voltage transient tolerance. IC Role / Device Role / Timing Role: PNP high-side switch controlling relay coil current path with emitter tied to VCC, collector to coil, and base driven by microcontroller via current-limiting resistor. Use Value: 300 V VCEO withstands inductive kickback spikes without snubber diode; 500 mA IC supports standard 400–800 Ω relay coils. |
Use Scenario: Providing isolated gate drive for N-channel MOSFETs in offline flyback converters operating at 60–100 kHz. IC Role / Device Role / Timing Role: Configured as emitter-follower buffer stage to translate logic-level PWM signals to higher-voltage gate drive while maintaining fast edge integrity. Use Value: 50 MHz fT preserves rise/fall times below 10 ns; VCE(sat) ≤ 0.5 V minimizes propagation delay and shoot-through risk. |
| High-Voltage Linear Amplifier | Legacy Equipment Replacement |
Use Scenario: Audio-frequency preamplifier stage in tube amplifier hybrids or high-voltage sensor signal conditioning. IC Role / Device Role / Timing Role: Common-emitter amplifier biased for Class-A operation with collector load connected to 100–250 V rail. Use Value: hFE = 25–40 ensures stable bias point across temperature; 150°C max TJ allows operation near heat-generating tubes or transformers. |
Use Scenario: Drop-in replacement for obsolete PNP transistors (e.g., 2N2907A, BC557) in field-repair of industrial instrumentation and telecom line cards. IC Role / Device Role / Timing Role: Direct functional substitute in existing schematics where VCEO, IC, and hFE match legacy requirements and TO-92 footprint is retained. Use Value: Identical pinout (E-B-C), same TO-92 mechanical dimensions, and compatible thermal profile enable zero-layout-change repair. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP high-voltage amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBTA92 | SOT-23 surface-mount package; lower PD = 350 mW; RθJA = 357 °C/W; same VCEO/IC/fT specs. | Requires PCB redesign for SMT assembly; unsuitable for through-hole prototyping or high-power dissipation. | Select when board space is constrained and thermal management via copper pour or airflow is available. |
| PZTA92 | SOT-223 package with exposed collector tab; PD = 1,000 mW; RθJA = 125 °C/W; identical electrical specs but enhanced thermal performance. | Supports higher continuous current in compact footprint; requires solder pad for thermal relief and mechanical anchoring. | Select for production designs needing >625 mW dissipation without heatsink, especially in enclosed enclosures. |
Compared with MMBTA92 and PZTA92, the MPSA92_D81Z offers the only TO-92 through-hole option among the three, delivering lowest assembly cost and highest serviceability - while MMBTA92 trades package size for reduced thermal margin, and PZTA92 adds thermal capability at the expense of larger footprint and reflow process dependency.
Availability
MPSA92_D81Z is available at Aetrix Electronics and suitable for relay driver circuits, flyback converter gate drivers, and high-voltage linear amplifier stages requiring stable component supply, long-lifecycle support, and consistent parametric performance across manufacturing lots.
Supply support for MPSA92_D81Z 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 semiconductor manufacturer specializing in power management, analog, and discrete devices before its acquisition by ON Semiconductor in 2016; its legacy product lines remain widely supported in industrial and automotive applications.
The MPSA92_D81Z belongs to Fairchild's general-purpose high-voltage PNP transistor family, engineered for robustness in industrial control, power supply, and legacy equipment repair - emphasizing reliability, wide temperature operation, and compatibility with legacy through-hole assembly processes.
FAQ
What is the pin configuration of the MPSA92_D81Z?
The MPSA92_D81Z uses a standard TO-92 package with Emitter–Base–Collector (E-B-C) pinout when viewed with flat side facing outward and leads pointing down. Pin 1 is Emitter, Pin 2 is Base, and Pin 3 is Collector - matching JEDEC TO-92 outline and fully compatible with legacy 2N2907A layouts.
Does the MPSA92_D81Z support operation above 100°C ambient temperature?
Yes, the MPSA92_D81Z is rated for operation from −55°C to +150°C junction temperature. At 100°C ambient, derated power dissipation is approximately 375 mW (using RθJA = 200 °C/W), allowing reliable use in sealed enclosures or near heat sources when operated below 200 mW average power.
Is the MPSA92_D81Z RoHS compliant?
Yes, the MPSA92_D81Z manufactured under Fairchild's D81Z tape-and-reel flow code meets RoHS Directive 2011/65/EU requirements, with lead-free terminations and halogen-free molding compound - confirmed by Fairchild's material declarations dated 2005 onward.
Can the MPSA92_D81Z replace a 2N2907A in an existing design?
Yes, the MPSA92_D81Z is a direct functional and mechanical replacement for the 2N2907A: identical TO-92 package, same E-B-C pinout, matched VCEO = 300 V, IC = 500 mA, and hFE range - with improved fT (50 MHz vs. ~200 kHz) and tighter parameter distribution due to modern Process 76 fabrication.
What is the maximum safe operating voltage for the MPSA92_D81Z in switching applications?
The MPSA92_D81Z must not exceed 300 V between collector and emitter (VCEO) or collector and base (VCBO) under any condition, including transient spikes. For reliable switching, design margins should limit steady-state VCE to ≤ 240 V and include clamping (e.g., Zener or RC snubber) to suppress inductive overshoot beyond 300 V.
MPSA92_D81Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- 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:
- 25 @ 30mA, 10V
- Power - Max:
- 625 mW
- Frequency - Transition:
- 50MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
MPSA92_D81Z FAQ
1.How can I place an order for MPSA92_D81Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPSA92_D81Z 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 MPSA92_D81Z reliable?
The price and inventory of MPSA92_D81Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPSA92_D81Z is usually 5 days.
3.What payment methods are accepted for MPSA92_D81Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPSA92_D81Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPSA92_D81Z?
MPSA92_D81Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPSA92_D81Z 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 MPSA92_D81Z?
For technical support, including MPSA92_D81Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPSA92_D81Z requirements.
6.How does Aetrix verify that MPSA92_D81Z is sourced from the original manufacturer or authorized distributors?
All MPSA92_D81Z 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 MPSA92_D81Z meets industry standards.
7.What is the process for return or replacement of MPSA92_D81Z?
All MPSA92_D81Z units undergo pre-shipment inspection (PSI). If there is an issue with MPSA92_D81Z, 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 MPSA92_D81Z part is unused and in its original packaging.
Return procedure for MPSA92_D81Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPSA92_D81Z Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
