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 > FETs, MOSFETs > FETs, MOSFETs

STMicroelectronics STDLED625

Name: STDLED625
Brand: STMicroelectronics
SKU: STDLED625
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: STDLED625

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: STDLED625.pdf

Description:: MOSFET N-CH 620V 5A DPAK

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:6,641

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

Product details

Overview

STDLED625 from STMicroelectronics is an N-channel 620 V, 1.28 Ω typ., 5.0 A Power MOSFET in DPAK (TO-252) package, designed for primary-side switching in LED lighting flyback and buck-boost converters. It features Zener-protected gate, 100% avalanche tested operation, 12 V/ns dv/dt capability, and low 890 pF input capacitance.

For engineers reviewing the STDLED625 datasheet, STDLED625 pinout, STDLED625 application, or STDLED625 equivalent, key selection criteria include its 620 V V_DS, 1.28 Ω R_DS(on) at 10 V_GS, 35 nC total gate charge, 290 ns diode reverse recovery time, and DPAK thermal resistance of 1.79 °C/W junction-to-case.

Technical Context

This MOSFET employs a planar high-voltage process with integrated back-to-back gate-source Zener diodes rated at ±30 V, enabling robust ESD immunity and transient suppression without external clamps. Its optimized cell layout delivers low intrinsic capacitance (C_iss = 890 pF, C_oss = 110 pF) and minimized gate charge (Q_g = 35 nC), supporting high-frequency switching up to several hundred kHz in isolated LED drivers.

The device's source-drain diode exhibits improved reverse recovery characteristics (Q_rr = 1900 nC, t_rr = 290 ns at T_j = 25 °C), reducing switching losses and voltage overshoot during hard commutation. Its safe operating area (SOA) is characterized up to 10 ms pulses at T_C = 25 °C, with 4.2 A repetitive avalanche current rating and 120 mJ single-pulse avalanche energy at V_DD = 50 V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	620 V - Supports 400 V AC mains-derived bus voltages with ≥50% safety margin in offline LED drivers.
R_DS(on) typ.	1.28 Ω @ V_GS = 10 V - Enables <1.3 W conduction loss at 5 A DC, critical for thermally constrained LED ballasts.
Q_g	35 nC - Reduces gate drive power and enables use of low-cost, low-current gate drivers in cost-sensitive lighting designs.
t_rr	290 ns - Limits diode-induced voltage spikes and EMI in discontinuous conduction mode (DCM) flyback topologies.
R_thj-case	1.79 °C/W - Allows 25 W continuous dissipation with ≤45 °C case temperature rise, suitable for compact PCB-mount applications.
EAS	120 mJ - Withstands unclamped inductive switching events common during LED string open-circuit faults.
dv/dt	12 V/ns - Ensures reliable turn-off immunity against parasitic coupling in high-noise LED driver environments.

Pinout & Package

DPAK (TO-252) package with exposed drain tab for thermal and electrical connection; surface-mount, single-ended lead configuration; JEDEC standard footprint with 2.28 mm lead pitch.

Pin/Terminal	Circuit Role	Design Meaning
D (Tab)	Drain	High-voltage power terminal; electrically and thermally connected to PCB copper pour for heat dissipation and primary-side return path.
G (Pin 1)	Gate	Control input; requires <3.5 Ω series resistance to damp ringing due to low 18 pF Crss and 35 nC Qg.
S (Pin 3)	Source	Power return and reference node; connects to current-sense resistor and gate-drive return, forming local ground loop.

Key Features

Feature	Design Value
Zener-protected gate	±30 V bidirectional clamping eliminates need for external gate protection components in LED driver PCB layouts.
100% avalanche tested	Guarantees ruggedness under overvoltage transients without derating, simplifying reliability validation for Class II LED luminaires.
Extremely high dv/dt capability	12 V/ns rating prevents false turn-on during fast voltage transitions in high-frequency flyback snubber networks.
Improved diode reverse recovery	290 ns t_rr and 1900 nC Q_rr reduce switching losses and EMI generation in DCM LED drivers.
Low intrinsic capacitance	C_iss = 890 pF and C_oss = 110 pF minimize capacitive coupling and enable stable operation above 200 kHz.

Applications

LED Street Lighting Driver

Commercial Downlight Ballast

Use Scenario: 100–200 W isolated flyback converter powering constant-current LED strings from 230 V AC mains.

IC Role / Device Role / Timing Role: Primary-side high-voltage switch handling 620 V blocking and 5 A peak currents during PWM on-time.

Use Value: 1.28 Ω R_DS(on) limits conduction loss to <1.3 W, enabling natural-convection cooling in sealed outdoor enclosures.

Use Scenario: 20–40 W buck-boost LED driver for dimmable architectural downlights with TRIAC phase-cut input.

IC Role / Device Role / Timing Role: High-side switch operating in continuous conduction mode with 200–500 kHz switching frequency.

Use Value: 35 nC Q_g reduces gate drive losses by >40% vs. legacy 600 V MOSFETs, improving efficiency at light loads.

Industrial LED Panel Light

Smart Home LED Gateway Driver

Use Scenario: 60 W multi-string LED panel with active PFC front-end and flyback secondary regulation.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier control switch in quasi-resonant flyback stage.

Use Value: 290 ns t_rr ensures clean zero-voltage switching transition, reducing EMI and enabling CISPR-15 compliance.

Use Scenario: 15 W smart bulb driver with integrated Zigbee/Bluetooth MCU and analog dimming interface.

IC Role / Device Role / Timing Role: Compact, low-thermal-footprint primary switch enabling integration into <20 mm diameter bulb base.

Use Value: DPAK package with 1.79 °C/W R_thj-case allows full 5 A operation within 45 °C ambient, meeting UL1598 thermal limits.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage LED driver switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP6N62FD	620 V, 1.4 Ω R_DS(on), 6 A ID, TO-220 package, no integrated Zener	Requires external gate protection; higher R_DS(on) increases conduction loss by ~9%	Preferred where through-hole mounting and higher current headroom are prioritized over board space and gate protection simplicity.
FDPF5N62	625 V, 1.6 Ω R_DS(on), 5.2 A ID, TO-220FP package, no avalanche rating	Lacks 100% avalanche testing and Zener protection; lower dv/dt rating (8 V/ns)	Suitable for non-safety-critical indoor lighting where cost is primary constraint and transient immunity is less demanding.

Compared with STP6N62FD and FDPF5N62, STDLED625 offers superior gate protection, tighter R_DS(on) tolerance, and verified avalanche ruggedness-critical for long-lifetime outdoor LED installations where surge immunity and thermal reliability are non-negotiable.

Availability

STDLED625 is available at Aetrix Electronics and suitable for LED street lighting drivers, commercial downlight ballasts, and industrial LED panel lights requiring stable component supply across multi-year production cycles.

Supply support for STDLED625 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering innovative solutions across automotive, industrial, power, and digital consumer markets since 1987.

This device belongs to ST's "LED-specific Power MOSFET" product line, engineered explicitly for high-efficiency, high-reliability offline LED drivers with integrated protection and optimized switching behavior.

FAQ

What is the maximum continuous drain current at 100 °C case temperature?

The STDLED625 supports 3.5 A continuous drain current at T_C = 100 °C, as specified in Table 2 of the datasheet. This derating reflects thermal limitations of the DPAK package and must be applied when ambient conditions or PCB layout restrict heat dissipation.

Does STDLED625 require an external gate Zener diode?

No. The device integrates back-to-back Zener diodes between gate and source with ±30 V breakdown voltage (V_(BR)GSO), eliminating the need for external gate protection components in typical LED driver applications.

Can STDLED625 replace STULED625 in the same PCB footprint?

No. STDLED625 uses DPAK (TO-252) packaging while STULED625 uses IPAK (TO-251); their land patterns differ significantly-DPAK has a 6.2 mm × 6.6 mm body with 2.28 mm lead pitch, whereas IPAK has a taller 16.1 mm height and different lead spacing.

What is the safe operating area (SOA) limitation at 100 µs pulse width?

At 100 µs pulse width and T_C = 25 °C, the SOA limit is approximately 12 A at 400 V V_DS, derived from Figure 2 in the datasheet. This defines the maximum simultaneous voltage/current stress the device can withstand without thermal runaway during transient events.

STDLED625 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 620 V

Current - Continuous Drain (Id) @ 25°C:: 5A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 10V

Rds On (Max) @ Id, Vgs:: 1.6Ohm @ 2.1A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 50µA

Gate Charge (Qg) (Max) @ Vgs:: 35 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 890 pF @ 50 V

FET Feature:: -

Power Dissipation (Max):: 70W (Tc)

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

STDLED625 FAQ

1.How can I place an order for STDLED625 through Aetrix?

Please submit a Request for Quotation (RFQ) for STDLED625 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 STDLED625 reliable?

The price and inventory of STDLED625 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STDLED625 is usually 5 days.

3.What payment methods are accepted for STDLED625?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STDLED625 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STDLED625?

STDLED625 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STDLED625 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 STDLED625?

For technical support, including STDLED625 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STDLED625 requirements.

6.How does Aetrix verify that STDLED625 is sourced from the original manufacturer or authorized distributors?

All STDLED625 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 STDLED625 meets industry standards.

7.What is the process for return or replacement of STDLED625?

All STDLED625 units undergo pre-shipment inspection (PSI). If there is an issue with STDLED625, 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 STDLED625 part is unused and in its original packaging.

Return procedure for STDLED625:

1.Submit a request within 90 days.

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

Tech Hub

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…

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…