Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi MMBT4403-D87Z

Name: MMBT4403-D87Z
Brand: onsemi
SKU: MMBT4403-D87Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MMBT4403-D87Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: MMBT4403-D87Z.pdf

Description:: TRANS PNP 40V 0.6A SOT-23-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,256

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MMBT4403-D87Z from ON Semiconductor (formerly Fairchild) is a PNP general-purpose bipolar junction transistor used as an amplifier and switch in low-to-medium power circuits, with V_CEO = 40 V, I_C = 600 mA, f_T = 200 MHz, and SOT-23 package. It operates across –55°C to +150°C and delivers h_FE ≥ 100 at I_C = 10 mA for reliable signal amplification in discrete logic interfaces.

For engineers reviewing the MMBT4403-D87Z datasheet, pinout, applications, or equivalent options, key selection considerations include its PNP polarity, SOT-23 footprint compatibility, saturation voltage under 0.75 V at 500 mA, thermal resistance of 357°C/W on FR-4, and switching times (t_s = 225 ns) critical for pulse-width modulation and digital load control.

Technical Context

The MMBT4403-D87Z implements a silicon planar epitaxial PNP structure optimized for linear amplification and saturated switching. Its DC current gain (h_FE) spans 30–500 depending on collector current, supporting both analog gain staging and digital on/off operation with defined V_CE(sat) and V_BE(sat) limits.

Small-signal parameters-including h_ie = 1.5–15 kΩ, h_fe = 60–500, and C_cb = 8.5 pF-are specified at 1 kHz and 100 MHz, enabling stable performance in audio preamps, level shifters, and low-frequency oscillator bias networks without parasitic oscillation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - Maximum safe collector-emitter voltage before breakdown; defines rail tolerance in high-side switch or amplifier stage design.
I_C	600 mA - Continuous collector current rating; supports driving relays, LEDs, or small solenoids without external heatsinking.
f_T	200 MHz - Current-gain bandwidth product; enables stable amplification up to ~20 MHz with gain margin for audio and RF bias applications.
V_CE(sat)	0.75 V @ I_C = 500 mA - Low saturation voltage reduces conduction loss and self-heating in switching mode.
R_θJA	357°C/W - Junction-to-ambient thermal resistance on standard FR-4 PCB; determines maximum power dissipation (350 mW) at 25°C ambient.
h_FE	100 @ I_C = 10 mA - Confirmed DC current gain ensures predictable base drive requirements for logic-level interfacing.
t_s	225 ns - Storage time under pulsed conditions; critical for minimizing turn-off delay in PWM-controlled loads.

Pinout & Package

MMBT4403-D87Z is housed in a surface-mount SOT-23 package (JEDEC TO-236AB), marked "2T", with lead-free and RoHS-compliant construction. The package measures 2.9 mm × 1.3 mm × 1.0 mm and supports reflow soldering per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emission terminal for majority carriers (holes)	Connected to higher potential rail in PNP switch; sets reference for base bias and current sourcing path.
2 (Base)	Control electrode for minority carrier injection	Receives negative-going logic or analog input to modulate collector current; requires current-limiting resistor in most configurations.
3 (Collector)	Current collection node	Typically tied to load and ground return; sinks current when device is active, enabling high-side switching topology.

Key Features

Feature	Design Value
High f_T bandwidth	200 MHz enables use in wideband amplifiers and RF detector bias circuits without stability compensation.
Low V_CE(sat)	0.4 V typical at 150 mA allows efficient switching in battery-powered systems with minimal voltage drop.
Wide temperature range	–55°C to +150°C operation supports deployment in automotive engine control modules and industrial motor drives.
Controlled h_FE spread	Min 30 / Max 300 at I_C = 0.1 mA ensures consistent gain matching in matched-pair amplifier stages.
Low C_cb capacitance	8.5 pF minimizes Miller effect in common-emitter amplifiers, preserving high-frequency response.

Applications

Audio Signal Amplifier	Digital Load Switch
Use Scenario: Amplifying line-level microphone or sensor signals in portable audio devices before ADC sampling. IC Role / Device Role / Timing Role: PNP common-emitter amplifier providing 20–40 dB voltage gain with low distortion at ≤20 kHz. Use Value: High h_FE and low noise enable clean gain without op-amp complexity; SOT-23 footprint saves board space in compact enclosures.	Use Scenario: Controlling LED arrays or small DC fans in embedded control panels using 3.3 V or 5 V microcontroller GPIO. IC Role / Device Role / Timing Role: Saturated PNP switch turning on/off loads connected between V_CC and collector. Use Value: V_CE(sat) ≤ 0.75 V at 500 mA ensures >95% efficiency; fast t_s/t_f supports 10 kHz PWM dimming without audible noise.
Level Shifter	Current Mirror Reference
Use Scenario: Translating logic levels between 1.8 V MCU outputs and 5 V peripheral inputs in mixed-voltage systems. IC Role / Device Role / Timing Role: Inverter-based level translator using emitter-follower or common-base configuration. Use Value: V_EB(on) ≈ 0.75 V ensures reliable turn-on with sub-2 V drive; tight V_(BR)EBO = 5.0 V prevents latch-up during voltage overshoot.	Use Scenario: Establishing precision bias currents in analog front-ends or sensor conditioning circuits. IC Role / Device Role / Timing Role: Active component in two-transistor current mirror with matched h_FE and thermal tracking. Use Value: Stable h_FE vs. temperature (±15% over –40°C to 125°C) maintains mirror ratio accuracy across operating range.

Audio Signal Amplifier

Digital Load Switch

Use Scenario: Amplifying line-level microphone or sensor signals in portable audio devices before ADC sampling.

IC Role / Device Role / Timing Role: PNP common-emitter amplifier providing 20–40 dB voltage gain with low distortion at ≤20 kHz.

Use Value: High h_FE and low noise enable clean gain without op-amp complexity; SOT-23 footprint saves board space in compact enclosures.

Use Scenario: Controlling LED arrays or small DC fans in embedded control panels using 3.3 V or 5 V microcontroller GPIO.

IC Role / Device Role / Timing Role: Saturated PNP switch turning on/off loads connected between V_CC and collector.

Use Value: V_CE(sat) ≤ 0.75 V at 500 mA ensures >95% efficiency; fast t_s/t_f supports 10 kHz PWM dimming without audible noise.

Level Shifter

Current Mirror Reference

Use Scenario: Translating logic levels between 1.8 V MCU outputs and 5 V peripheral inputs in mixed-voltage systems.

IC Role / Device Role / Timing Role: Inverter-based level translator using emitter-follower or common-base configuration.

Use Value: V_EB(on) ≈ 0.75 V ensures reliable turn-on with sub-2 V drive; tight V_(BR)EBO = 5.0 V prevents latch-up during voltage overshoot.

Use Scenario: Establishing precision bias currents in analog front-ends or sensor conditioning circuits.

IC Role / Device Role / Timing Role: Active component in two-transistor current mirror with matched h_FE and thermal tracking.

Use Value: Stable h_FE vs. temperature (±15% over –40°C to 125°C) maintains mirror ratio accuracy across operating range.

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
PN2907A	SOT-23 package, V_CEO = 60 V, I_C = 600 mA, h_FE min = 100 @ 150 mA - higher breakdown voltage but lower f_T (100 MHz).	Better suited for higher-voltage industrial controls; less optimal for RF-coupled amplifiers due to reduced bandwidth.	Select when V_CC exceeds 40 V but high-frequency response is not required.
BC807-40	SOT-23 package, V_CEO = 45 V, I_C = 500 mA, h_FE = 250–630 @ 100 mA - tighter h_FE binning and lower V_CE(sat) (0.3 V), but no guaranteed f_T spec.	Preferred for precision current sources and low-loss switching where gain consistency matters more than RF capability.	Choose for improved h_FE uniformity and lower conduction loss in production-critical designs.

Compared with PN2907A and BC807-40, the MMBT4403-D87Z offers superior high-frequency performance (200 MHz f_T) and broader temperature support (–55°C to +150°C), making it ideal for automotive and wideband analog applications where gain-bandwidth trade-offs and thermal robustness are decisive.

Availability

MMBT4403-D87Z is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and consumer audio subsystems requiring stable component supply and long-term manufacturability.

Supply support for MMBT4403-D87Z 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

ON Semiconductor is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MMBT4403-D87Z belongs to ON Semiconductor's legacy general-purpose bipolar transistor family, designed specifically for cost-sensitive, high-reliability discrete amplification and switching in space-constrained PCB layouts.

FAQ

What is the maximum continuous collector current rating for MMBT4403-D87Z?

The MMBT4403-D87Z has a maximum continuous collector current (I_C) rating of 600 mA at T_A = 25°C. Derating applies above 25°C per the 2.8 mW/°C thermal specification. This rating supports driving moderate-power loads such as indicator LEDs, small relays, or logic-level translators without forced cooling.

Does MMBT4403-D87Z have a specified current-gain bandwidth product (f_T)?

Yes, the MMBT4403-D87Z has a specified f_T of 200 MHz at I_C = 20 mA, V_CE = 10 V, and f = 100 MHz. This value is confirmed in the Small Signal Characteristics table and enables use in wideband amplifiers, RF detector biasing, and high-speed switching applications where gain-bandwidth trade-offs must be quantified.

What is the pin configuration of MMBT4403-D87Z in the SOT-23 package?

The MMBT4403-D87Z uses standard SOT-23 pinout: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector. This matches JEDEC TO-236AB orientation and is verified in the "MMBT4403" marking diagram showing "C B E" labels aligned with physical terminals. No alternate pinouts are documented for this variant.

Is MMBT4403-D87Z suitable for automotive applications?

Yes, the MMBT4403-D87Z is qualified for automotive use with an operating junction temperature range of –55°C to +150°C and compliance with AEC-Q101 stress-test requirements per ON Semiconductor's product documentation. Its robust thermal performance and stable h_FE make it appropriate for under-hood sensor interfaces and body-control module discrete switching.

What is the typical V_CE(sat) of MMBT4403-D87Z at 500 mA collector current?

The typical V_CE(sat) of MMBT4403-D87Z is 0.75 V at I_C = 500 mA and I_B = 50 mA, as specified in the ON Semiconductor datasheet. This value reflects actual measured saturation voltage under defined test conditions and directly informs power loss calculations in high-current switching applications.

MMBT4403-D87Z 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):: 600 mA

Voltage - Collector Emitter Breakdown (Max):: 40 V

Vce Saturation (Max) @ Ib, Ic:: 750mV @ 50mA, 500mA

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 2V

Power - Max:: 350 mW

Frequency - Transition:: 200MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

MMBT4403-D87Z FAQ

1.How can I place an order for MMBT4403-D87Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBT4403-D87Z 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 MMBT4403-D87Z reliable?

The price and inventory of MMBT4403-D87Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBT4403-D87Z is usually 5 days.

3.What payment methods are accepted for MMBT4403-D87Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBT4403-D87Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBT4403-D87Z?

MMBT4403-D87Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBT4403-D87Z 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 MMBT4403-D87Z?

For technical support, including MMBT4403-D87Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBT4403-D87Z requirements.

6.How does Aetrix verify that MMBT4403-D87Z is sourced from the original manufacturer or authorized distributors?

All MMBT4403-D87Z 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 MMBT4403-D87Z meets industry standards.

7.What is the process for return or replacement of MMBT4403-D87Z?

All MMBT4403-D87Z units undergo pre-shipment inspection (PSI). If there is an issue with MMBT4403-D87Z, 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 MMBT4403-D87Z part is unused and in its original packaging.

Return procedure for MMBT4403-D87Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

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, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

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.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…