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 STDLED625H

Name: STDLED625H
Brand: STMicroelectronics
SKU: STDLED625H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: STDLED625H

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

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

Datasheet:: STDLED625H.pdf

Description:: MOSFET N-CH 620V 4.5A DPAK

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,500

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

Product details

Overview

STDLED625H from STMicroelectronics is an N-channel 620 V, 1.7 Ω (typ), 4.5 A Power MOSFET in DPAK (TO-252) package, optimized for LED lighting drivers operating in buck-boost and flyback topologies with high dv/dt immunity and integrated gate Zener protection.

For engineers reviewing the STDLED625H datasheet, STDLED625H pinout, STDLED625H application, or STDLED625H equivalent, key selection criteria include avalanche ruggedness (EAS = 115 mJ), low Coss (27 pF eq.), Zener-protected gate (V_BRGSO = 30 V), and thermal resistance (R_thj-case = 1.79 °C/W) for thermally constrained LED driver designs.

Technical Context

This MOSFET employs a planar silicon process with built-in back-to-back gate-source Zener diodes (±30 V breakdown) to eliminate external ESD protection components. Its 12 V/ns peak diode recovery dv/dt capability supports robust operation in discontinuous conduction mode (DCM) flyback LED drivers.

The device features minimized gate charge (Q_g = 23 nC typ) and ultra-low intrinsic capacitance (C_iss = 560 pF, C_oss = 43 pF), enabling high-frequency switching (>100 kHz) while maintaining low switching losses in constant-current LED regulation circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	620 V - Supports input voltages up to 400 VAC mains-derived rails with margin for surge transients in off-line LED drivers.
R_DS(on)	1.7 Ω (typ) at V_GS = 10 V - Enables <1.5 W conduction loss at 4.5 A, suitable for 20–30 W LED modules.
I_D (cont)	4.5 A at T_C = 25 °C - Rated for continuous output current in thermally managed PCB layouts with heatsinked DPAK tab.
E_AS	115 mJ - Withstands single-pulse inductive energy without failure during startup or short-circuit events in flyback converters.
dv/dt	12 V/ns - Prevents false turn-on during fast voltage transitions across drain-source in high-side switch configurations.
C_oss eq.	27 pF - Reduces capacitive switching loss and improves efficiency at 65–100 kHz switching frequencies typical of LED ballasts.
T_j max	150 °C - Allows operation in enclosed luminaires with ambient temperatures up to 85 °C when R_thj-pcb ≤ 50 °C/W is achieved.

Pinout & Package

DPAK (TO-252) package with exposed drain-connected tab for thermal and electrical connection; 3-pin surface-mount outline with standard footprint per Figure 22 (DocID024435 Rev 1, p.13).

Pin/Terminal	Circuit Role	Design Meaning
D (Tab)	Drain (high-side switching node)	Electrically and thermally connected to PCB copper pour; requires isolation from heatsink unless referenced to same potential.
G (Pin 1)	Gate (control input)	Zener-protected (±30 V) - tolerates ±2500 V HBM ESD; driven via 4.7 Ω series resistor per switching test circuit (Fig.15).
S (Pin 3)	Source (power return/reference)	Common reference for gate drive and current sensing; low-inductance layout critical for stable dv/dt immunity.

Key Features

Feature	Design Value
100% avalanche tested	Guarantees EAS ≥ 115 mJ per unit - eliminates screening failures in unclamped inductive switching applications like flyback snubberless designs.
Extremely high dv/dt capability	12 V/ns rated - prevents spurious turn-on in high-noise LED driver environments without requiring negative gate bias.
Gate charge minimized	Q_g = 23 nC (typ) - reduces gate driver power requirement and enables use of low-cost SOT-23 MOSFET drivers in compact LED modules.
Zener-protected gate	V_BRGSO = 30 V - removes need for external TVS diodes, simplifying BOM and improving long-term reliability in humid or dusty outdoor luminaires.
Improved diode reverse recovery	t_rr = 220 ns (T_j = 25 °C) - lowers switching loss and EMI in synchronous rectification or freewheeling paths within LED drivers.

Applications

LED Street Lighting Driver

Commercial Downlight Ballast

Use Scenario: Off-line 100–277 VAC input, 30 W constant-current flyback LED driver for outdoor pole-mounted fixtures.

IC Role / Device Role / Timing Role: High-side primary switch regulating LED string current via primary-side sensing and PWM control.

Use Value: 620 V rating accommodates 277 VAC + 100% surge margin; 1.7 Ω R_DS(on) limits conduction loss to <1.2 W at full load, enabling passive cooling.

Use Scenario: Indoor 120/230 VAC input, 20 W buck-boost LED driver powering multi-segment tunable-white downlights.

IC Role / Device Role / Timing Role: Main power switch operating in DCM at 85 kHz, controlled by dedicated LED controller IC (e.g., STNRG388A).

Use Value: Low C_oss (27 pF eq.) and Q_g (23 nC) minimize switching loss, achieving >90% efficiency at 20 W with minimal heatsinking.

Industrial LED Panel Light

UV-C Disinfection Module

Use Scenario: 24 VDC-powered 40 W LED panel light with analog dimming, used in factory cleanrooms and medical facilities.

IC Role / Device Role / Timing Role: Low-voltage side switch in synchronous buck topology, driven by gate driver with 10 V logic-level output.

Use Value: Zener-protected gate withstands ESD events during manual assembly and field servicing; R_thj-case = 1.79 °C/W enables direct mounting to aluminum backplate.

Use Scenario: Pulsed 275 nm UV-C LED array driver requiring precise current pulses (100 ms on, 500 ms off) at 1.2 A peak.

IC Role / Device Role / Timing Role: Fast-switching power switch enabling accurate pulse-width control with minimal tail current due to low Q_gd (4 nC).

Use Value: 12 V/ns dv/dt rating ensures reliable turn-off during rapid voltage transitions across UV LED string; t_f = 19 ns minimizes pulse edge distortion.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP6N62FD	Same 620 V rating, but R_DS(on) = 2.2 Ω (max) and no integrated gate Zener; TO-220 package.	Larger footprint and higher thermal resistance (R_thj-case = 2.5 °C/W); requires external gate protection.	Preferred only where through-hole assembly or higher pulse current (I_DM = 24 A) is required.
FQP6N62	620 V, R_DS(on) = 2.0 Ω (max), no avalanche rating or Zener protection; TO-220FP package.	No EAS specification; gate ESD rating unspecified; unsuitable for unclamped inductive loads.	Lower-cost option only for non-safety-critical, low-volume indoor LED lamps with external protection.

Compared with STP6N62FD and FQP6N62, STDLED625H delivers superior system-level reliability in LED drivers due to its guaranteed avalanche ruggedness, integrated gate Zener, and DPAK thermal performance-enabling smaller form factors and eliminating two external components.

Availability

STDLED625H is available at Aetrix Electronics and suitable for LED street lighting drivers, commercial downlight ballasts, and industrial panel lights requiring stable component supply and long-lifecycle support.

Supply support for STDLED625H 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

STDLED625H belongs to ST's "LED-specific Power MOSFET" product line, engineered to address thermal, reliability, and EMI challenges in high-efficiency, high-voltage AC/DC LED drivers with minimal external components.

FAQ

Is STDLED625H suitable for use in automotive LED headlamp drivers?

No. STDLED625H is not qualified for automotive applications and lacks AEC-Q101 certification, junction temperature derating for under-hood environments, or specified operation above 125 °C. Its datasheet explicitly excludes automotive use per Section "Please Read Carefully". It is intended solely for industrial and commercial LED lighting.

What is the maximum recommended gate resistor value for reliable switching?

Based on the test circuit in Figure 15 (RG = 4.7 Ω), and considering Q_g = 23 nC and typical gate driver rise/fall times, RG should not exceed 10 Ω to maintain t_r/t_f < 25 ns and avoid excessive switching loss. Higher values increase dv/dt-induced ringing risk in high-di/dt LED driver layouts.

Does the DPAK tab require electrical isolation from the heatsink?

Yes. The DPAK tab is internally connected to the Drain (D) terminal. If the heatsink is grounded or at a different potential, an electrically insulating but thermally conductive pad (e.g., silicone-based thermal tape or ceramic washer) must be used to prevent short circuits while maintaining R_thj-case ≤ 1.79 °C/W performance.

Can STDLED625H replace STD1NK60Z in existing 12 W LED driver designs?

No. STD1NK60Z is a 600 V, 1 A device with significantly lower current and power handling. STDLED625H (4.5 A, 70 W) has higher R_DS(on), larger die size, and different gate charge profile-direct replacement would cause overcurrent stress on gate driver and PCB traces. Redesign of gate drive, current sense, and thermal layout is required.

STDLED625H 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:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 620 V

Current - Continuous Drain (Id) @ 25°C:: 4.5A (Tc)

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

Rds On (Max) @ Id, Vgs:: 2Ohm @ 1.9A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 50µA

Gate Charge (Qg) (Max) @ Vgs:: 23 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 560 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

STDLED625H FAQ

1.How can I place an order for STDLED625H through Aetrix?

Please submit a Request for Quotation (RFQ) for STDLED625H 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 STDLED625H reliable?

The price and inventory of STDLED625H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STDLED625H is usually 5 days.

3.What payment methods are accepted for STDLED625H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STDLED625H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STDLED625H?

STDLED625H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STDLED625H 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 STDLED625H?

For technical support, including STDLED625H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STDLED625H requirements.

6.How does Aetrix verify that STDLED625H is sourced from the original manufacturer or authorized distributors?

All STDLED625H 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 STDLED625H meets industry standards.

7.What is the process for return or replacement of STDLED625H?

All STDLED625H units undergo pre-shipment inspection (PSI). If there is an issue with STDLED625H, 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 STDLED625H part is unused and in its original packaging.

Return procedure for STDLED625H:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 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…

2026-09-01 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…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…