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 > Thyristors > SCRs

Renesas 3P4MH(8)-AZ

Name: 3P4MH(8)-AZ
Brand: Renesas
SKU: 3P4MH(8)-AZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 3P4MH(8)-AZ

Manufacturer:: Renesas

Category:: SCRs

Package:: -

Datasheet:: 3P4MH(8)-AZ.pdf

Description:: SILICON CONTROLLED RECTIFIER

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:11,822

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

Product details

Overview

3P4MH(8)-AZ from Renesas Electronics is a 3 A average on-state current, 400 V repetitive peak off-state voltage (V_DRM) and reverse voltage (V_RRM) P-gate fully diffused molded SCR in TO-202AA package, designed for noncontact switching in consumer electronics, audio equipment, and light industrial controls.

For engineers reviewing the 3P4MH(8)-AZ datasheet, 3P4MH(8)-AZ pinout, 3P4MH(8)-AZ application, or 3P4MH(8)-AZ equivalent, key selection criteria include its 1.6 V on-state voltage at 10 A, 0.2 mA gate trigger current, 80 µs commutating turn-off time, and UL94V-0 flame-retardant epoxy encapsulation.

Technical Context

The 3P4MH(8)-AZ operates as a unidirectional silicon-controlled rectifier with P-gate construction and full diffusion, enabling reliable phase-controlled AC power switching. Its 50 A/µs critical rate of rise of on-state current (dI_T/dt) and 3 V/µs off-state dV/dt capability support stable triggering and noise immunity in line-frequency applications.

Thermal performance is defined by 8 °C/W junction-to-case thermal resistance and operation across −40 to +125 °C junction temperature range. Gate drive requirements are low: 0.8 V V_GT and 0.2 mA I_GT at 6 V anode-cathode voltage with 100 Ω load, compatible with standard logic-level trigger sources.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM / V_RRM	400 V - Maximum repetitive blocking voltage in forward and reverse directions; sets AC mains voltage compatibility up to 280 V RMS.
I_T(AV)	3 A at T_c = 87 °C - Continuous half-wave conduction rating; defines heatsink sizing for steady-state power control.
V_TM	1.6 V at I_T = 10 A - On-state voltage drop; determines conduction loss (≈4.8 W at 3 A average) and thermal design margin.
I_GT / V_GT	0.2 mA / 0.8 V - Minimum gate trigger levels; enables direct drive from microcontroller GPIO or optocoupler outputs without amplification.
t_q	80 µs - Commutating turn-off time at 125 °C; constrains minimum zero-crossing interval and maximum operating frequency in phase-control circuits.
R_th(j–c)	8 °C/W - Junction-to-case thermal resistance; allows calculation of case temperature rise (ΔT = P_loss × 8) for mechanical mounting validation.
dI_T/dt	50 A/µs - Critical rate of rise of on-state current; requires snubber design or gate resistor optimization to prevent false turn-on during high-di/dt transients.

Pinout & Package

Package: TO-202AA (standard 3-lead molded plastic package, UL94V-0 rated, 1.4 g typical weight). Mounting surface compatible with jig-based lead forming and heatsink attachment.

Pin/Terminal	Circuit Role	Design Meaning
<1> Cathode	Current return path during conduction	Connected to load return or circuit common; carries full load current and must be routed with low-inductance layout.
<2> Anode	Main power input terminal	Connected to AC line or DC supply; polarity-sensitive-reverse connection prevents latching and may damage device.
<3> Gate	Control input for turn-on initiation	Receives positive pulse relative to cathode; requires current-limited drive to avoid exceeding 2 W peak gate power rating.

Key Features

Feature	Design Value
P-gate fully diffused structure	Enables uniform current spreading and high dI_T/dt immunity without external cathode shorting.
UL94V-0 flame-retardant epoxy	Meets safety standards for consumer and industrial enclosures without additional potting or barrier materials.
TO-202AA mechanical footprint	Supports automated insertion and manual heatsink mounting using standard jigs; compatible with legacy 3P4MH layouts.
Low I_GT and V_GT	Reduces gate driver complexity-eliminates need for discrete transistor buffers in microcontroller-triggered designs.

Applications

AC Motor Speed Control	Light Dimming Circuit
Use Scenario: Phase-angle control of universal motor in power tools or fans using zero-crossing synchronized gate pulses. IC Role / Device Role / Timing Role: Main power switching element triggered at adjustable conduction angle to regulate RMS voltage delivered to motor winding. Use Value: Delivers precise torque/speed control with 3 A continuous rating and 65 A surge capability for motor startup inrush.	Use Scenario: Leading-edge dimming of incandescent or halogen lamps in residential lighting systems. IC Role / Device Role / Timing Role: AC line switch that conducts only during selected portion of each half-cycle to reduce lamp power. Use Value: Achieves flicker-free dimming down to 10% brightness with 1.6 V V_TM minimizing heat generation in compact enclosures.
Heater Power Regulation	Noncontact Appliance Switch
Use Scenario: Solid-state replacement for electromechanical relays in electric kettles, coffee makers, and soldering irons. IC Role / Device Role / Timing Role: Bidirectional power switch (with external diode or in back-to-back configuration) controlling resistive heating elements. Use Value: Supports 400 V blocking for 240 V AC mains and withstands 20 A²s fusing energy to survive repeated thermal cycling.	Use Scenario: Touch- or proximity-activated control in audio receivers, kitchen appliances, and vending machines. IC Role / Device Role / Timing Role: Isolated load switch activated via optocoupler or capacitive sensor interface to replace mechanical pushbuttons. Use Value: Enables silent, wear-free operation with 0.2 mA I_GT ensuring compatibility with low-power sensor outputs.

AC Motor Speed Control

Light Dimming Circuit

Use Scenario: Phase-angle control of universal motor in power tools or fans using zero-crossing synchronized gate pulses.

IC Role / Device Role / Timing Role: Main power switching element triggered at adjustable conduction angle to regulate RMS voltage delivered to motor winding.

Use Value: Delivers precise torque/speed control with 3 A continuous rating and 65 A surge capability for motor startup inrush.

Use Scenario: Leading-edge dimming of incandescent or halogen lamps in residential lighting systems.

IC Role / Device Role / Timing Role: AC line switch that conducts only during selected portion of each half-cycle to reduce lamp power.

Use Value: Achieves flicker-free dimming down to 10% brightness with 1.6 V V_TM minimizing heat generation in compact enclosures.

Heater Power Regulation

Noncontact Appliance Switch

Use Scenario: Solid-state replacement for electromechanical relays in electric kettles, coffee makers, and soldering irons.

IC Role / Device Role / Timing Role: Bidirectional power switch (with external diode or in back-to-back configuration) controlling resistive heating elements.

Use Value: Supports 400 V blocking for 240 V AC mains and withstands 20 A²s fusing energy to survive repeated thermal cycling.

Use Scenario: Touch- or proximity-activated control in audio receivers, kitchen appliances, and vending machines.

IC Role / Device Role / Timing Role: Isolated load switch activated via optocoupler or capacitive sensor interface to replace mechanical pushbuttons.

Use Value: Enables silent, wear-free operation with 0.2 mA I_GT ensuring compatibility with low-power sensor outputs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar SCR switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STMicroelectronics TS3A40	4 A I_T(AV), 400 V V_DRM, TO-220AB package, higher 2.5 V V_TM	Larger footprint; requires larger heatsink due to higher conduction loss	Preferred when higher surge current (80 A) and PCB-mount heatsinking are available.
ON Semiconductor 2N6504	4 A I_T(AV), 400 V V_DRM, TO-202AA package, 1.7 V V_TM, 0.5 mA I_GT	Nearly identical mechanical fit but higher gate drive requirement	Drop-in replacement where existing gate drive can supply ≥0.5 mA without redesign.

Compared with 3P4MH(8)-AZ, TS3A40 offers higher surge rating but increases conduction loss and board space; 2N6504 matches the TO-202AA footprint and voltage rating but demands stronger gate drive, making it suitable only when driver capability permits.

Availability

3P4MH(8)-AZ is available at Aetrix Electronics and suitable for AC motor speed control, light dimming circuits, and heater power regulation requiring stable component supply and long-term industrial availability.

Supply support for 3P4MH(8)-AZ 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

Renesas Electronics Corporation is a Japanese semiconductor manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, power, and discrete devices.

The 3P4MH(8)-AZ belongs to Renesas' legacy thyristor product line, engineered for cost-effective, robust AC power control in Standard-grade consumer and light industrial applications.

FAQ

What is the maximum junction temperature rating for the 3P4MH(8)-AZ?

The 3P4MH(8)-AZ has a specified junction temperature range of −40 to +125 °C. This rating ensures reliable operation in ambient environments up to +85 °C when mounted on a heatsink sized to maintain T_j ≤ 125 °C under worst-case conduction losses. Exceeding this limit risks parametric shift and accelerated failure.

Can the 3P4MH(8)-AZ be used in DC switching applications?

The 3P4MH(8)-AZ is a unidirectional SCR and cannot commutate itself in pure DC circuits. It remains latched once triggered unless current falls below the 1–5 mA holding current (I_H). For DC switching, forced commutation (e.g., auxiliary circuit or H-bridge reversal) is required-making it unsuitable for standalone DC load control without additional components.

What gate resistor value is recommended for driving the 3P4MH(8)-AZ from a 5 V microcontroller output?

With V_GT = 0.8 V and I_GT = 0.2 mA max, a 22 kΩ series gate resistor limits current to ≈0.19 mA at 5 V, satisfying the trigger requirement while protecting the MCU pin. Lower values (e.g., 10 kΩ) provide margin but increase gate power dissipation-ensure duty cycle stays ≤10% to remain within 0.2 W average gate power limit.

Is the 3P4MH(8)-AZ RoHS compliant?

Yes, the 3P4MH(8)-AZ complies with the EU RoHS Directive. Renesas Electronics confirms environmental compliance for this device, including restriction of lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE. Full material declarations and test reports are available upon request from Aetrix Electronics or Renesas sales offices.

Does the 3P4MH(8)-AZ require a snubber circuit in standard 50/60 Hz AC applications?

A snubber is recommended for the 3P4MH(8)-AZ when switching inductive loads (e.g., motors, transformers) due to its 3 V/µs dV/dt rating. Without suppression, voltage transients during turn-off may exceed V_DRM and cause false re-triggering. A standard RC snubber (e.g., 100 Ω + 0.1 µF) across anode–cathode mitigates this risk in most line-frequency designs.

3P4MH(8)-AZ Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Voltage - Off State:: -

Voltage - Gate Trigger (Vgt) (Max):: -

Current - Gate Trigger (Igt) (Max):: -

Voltage - On State (Vtm) (Max):: -

Current - On State (It (AV)) (Max):: -

Current - On State (It (RMS)) (Max):: -

Current - Hold (Ih) (Max):: -

Current - Off State (Max):: -

Current - Non Rep. Surge 50, 60Hz (Itsm):: -

SCR Type:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

3P4MH(8)-AZ FAQ

1.How can I place an order for 3P4MH(8)-AZ through Aetrix?

Please submit a Request for Quotation (RFQ) for 3P4MH(8)-AZ 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 3P4MH(8)-AZ reliable?

The price and inventory of 3P4MH(8)-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3P4MH(8)-AZ is usually 5 days.

3.What payment methods are accepted for 3P4MH(8)-AZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3P4MH(8)-AZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 3P4MH(8)-AZ?

3P4MH(8)-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 3P4MH(8)-AZ 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 3P4MH(8)-AZ?

For technical support, including 3P4MH(8)-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3P4MH(8)-AZ requirements.

6.How does Aetrix verify that 3P4MH(8)-AZ is sourced from the original manufacturer or authorized distributors?

All 3P4MH(8)-AZ 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 3P4MH(8)-AZ meets industry standards.

7.What is the process for return or replacement of 3P4MH(8)-AZ?

All 3P4MH(8)-AZ units undergo pre-shipment inspection (PSI). If there is an issue with 3P4MH(8)-AZ, 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 3P4MH(8)-AZ part is unused and in its original packaging.

Return procedure for 3P4MH(8)-AZ:

1.Submit a request within 90 days.

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

Tech Hub

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…