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 > Diodes > Rectifiers > Single Diodes

STMicroelectronics STPS1L20M

Name: STPS1L20M
Brand: STMicroelectronics
SKU: STPS1L20M
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: STPS1L20M

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-216AA

Datasheet:: STPS1L20M.pdf

Description:: DIODE SCHOTTKY 20V 1A STMITE

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:19,870

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

Product details

Overview

STPS1L20M from STMicroelectronics is a single low-drop Schottky rectifier optimized for high-frequency DC-DC converters and switch-mode power supplies, featuring 1 A average forward current (IF(AV)), 20 V repetitive peak reverse voltage (VRRM), 0.37 V maximum forward voltage drop at 1 A/85°C, 150°C maximum junction temperature, and STmite (DO-216-AA) surface-mount package.

For engineers reviewing the STPS1L20M datasheet, STPS1L20M pinout, STPS1L20M application, or STPS1L20M equivalent, key selection criteria include conduction loss modeling (P = 0.31×IF(AV) + 0.06×IF²(RMS)), avalanche capability (1400 W at 1 µs), thermal resistance (Rth(j-c) = 20°C/W), and suitability for space-constrained battery-powered systems requiring low VF and fast switching.

Technical Context

This Schottky diode employs a planar metal–semiconductor junction with optimized barrier height and epitaxial structure to achieve low forward voltage while maintaining controlled reverse leakage (<4.5 mA at 85°C, VR = VRRM). Its negligible minority-carrier storage enables ultrafast recovery without reverse recovery charge (Qrr ≈ 0).

The device is rated for repetitive avalanche energy (PARM = 1400 W at tp = 1 µs, Tj = 25°C) and exhibits dV/dt immunity up to 10,000 V/µs - critical for snubberless operation in high-di/dt flyback and synchronous rectifier topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
IF(AV)	1 A at Tc = 140°C, δ = 0.5 - defines continuous DC output current capability in thermally managed PCB layouts
VRRM	20 V - maximum allowable reverse bias before breakdown; sets upper limit for input/output voltage rails in low-voltage converters
VF(max)	0.37 V at IF = 1 A, Tj = 85°C - directly determines conduction loss (≈0.37 W per diode at 1 A) and system efficiency
Rth(j-c)	20 °C/W - junction-to-case thermal resistance; enables accurate heatsink-free thermal design using PCB copper as thermal path
IFSM	50 A non-repetitive surge (tp = 10 ms, sinusoidal) - supports inrush current handling in adapter and charger applications
dV/dt	10,000 V/µs - ensures stable blocking during fast transient voltage edges without spurious turn-on
IR(max)	4.5 mA at Tj = 85°C, VR = VRRM - quantifies leakage-induced standby power loss in battery-critical systems

Pinout & Package

STPS1L20M uses the STmite (DO-216-AA) surface-mount package: compact 1.9 mm × 1.9 mm footprint, 0.75 mm nominal height, molded epoxy body with exposed cathode pad for thermal and electrical connection.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry node	Connected to input/source side; must be routed with low-inductance trace to minimize voltage overshoot during switching
Cathode	Forward current exit node / thermal pad	Electrically and thermally connected to PCB copper pour; primary heat dissipation path and return path for load current

Key Features

Feature	Design Value
Low VF conduction loss	0.37 V max at 1 A/85°C - reduces power loss by >30% vs. comparable silicon diodes, extending battery runtime in portable devices
Avalanche-rated operation	1400 W peak avalanche power (tp = 1 µs) - eliminates need for external clamping in inductive switching circuits
Ultrafast switching	No reverse recovery charge (Qrr ≈ 0) - prevents switching losses and EMI in >500 kHz DC-DC topologies
Low thermal resistance	Rth(j-c) = 20°C/W - allows full 1 A rating with minimal PCB copper area (≥100 mm² recommended)
Small STmite package	DO-216-AA outline (1.9 × 1.9 mm) - fits tight-pitch layouts in PCMCIA cards, USB-C PD adapters, and ultra-thin notebooks

Applications

USB-C Power Delivery Adapter

Portable Device Battery Protection

Use Scenario: Secondary-side rectification in 20–30 W GaN-based USB-C PD adapters operating at 300–600 kHz.

IC Role / Device Role / Timing Role: Low-VF synchronous rectifier replacement; conducts during MOSFET off-time with zero Qrr-induced delay.

Use Value: Enables >94% efficiency at full load and meets CoC Tier 2 no-load power requirements (<30 mW) via sub-5 µA leakage at 5 V reverse bias.

Use Scenario: Reverse polarity protection in Li-ion powered medical wearables with 3.0–4.2 V battery range.

IC Role / Device Role / Timing Role: Series-connected anode-in configuration; blocks reverse current during hot-swap or misinsertion events.

Use Value: Limits forward drop to ≤0.43 V at 1 A, preserving >98% of battery voltage under load while surviving 50 A surges per IEC 61000-4-5.

PCMCIA Card Power Switching

Low-Voltage DC-DC Converter Output Stage

Use Scenario: Input rail switching and isolation in Type II PCMCIA cards with 3.3 V/5 V dual-supply architecture.

IC Role / Device Role / Timing Role: OR-ing diode between host-supplied and card-local power domains; enables seamless supply handover.

Use Value: 0.32 V typical VF at 85°C minimizes voltage droop during 1 A load transients, preventing brownout resets in embedded controllers.

Use Scenario: Output rectification in 12 V → 3.3 V buck converter for industrial IoT edge nodes (switching @ 1 MHz).

IC Role / Device Role / Timing Role: Freewheeling path during high-side MOSFET off-time; sustains continuous inductor current.

Use Value: Avalanche rating absorbs inductive kickback from 22 µH inductors without snubber, reducing BOM count and board area by 15%.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Diodes Inc. SB120	Same VRRM (20 V), IF(AV) = 1 A, VF = 0.45 V max at 1 A/25°C - 21% higher conduction loss than STPS1L20M at 85°C	DO-214AA package (3.8 × 1.9 mm) - 2× larger footprint; unsuitable for PCMCIA or thin-profile chargers	Select when DO-214AA is already standardized in layout and thermal margin exceeds 10°C
Vishay SS12	IF(AV) = 1 A, VRRM = 20 V, VF = 0.5 V max at 1 A/25°C, Rth(j-c) = 25°C/W - 25% higher thermal resistance limits sustained current in confined spaces	SOD-123 package - no exposed thermal pad; requires external heatsinking above 0.6 A continuous	Prefer only for cost-sensitive, low-power (<0.5 A avg) applications where board space permits discrete thermal relief

Compared with SB120 and SS12, STPS1L20M delivers lower conduction loss, superior thermal performance via its STmite thermal pad, and smaller footprint - making it optimal for high-density, thermally constrained battery-powered designs where efficiency and size are co-prioritized.

Availability

STPS1L20M is available at Aetrix Electronics and suitable for USB-C power adapters, portable medical devices, PCMCIA peripherals, and low-voltage DC-DC converters requiring stable component supply across production lifecycles.

Supply support for STPS1L20M 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 analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

STPS1L20M belongs to ST's STmite Schottky rectifier product line, engineered specifically for miniaturized, high-efficiency power conversion in space- and thermal-constrained portable electronics.

FAQ

What is the maximum ambient temperature for STPS1L20M at 1 A continuous current?

At IF(AV) = 1 A with δ = 0.5 and minimum recommended FR4 PCB pad (Figure 2), the maximum ambient temperature is 75°C. This assumes Rth(j-a) = 250°C/W and Tj(max) = 150°C. Derating is required above this point - e.g., 0.8 A at 100°C ambient.

Does STPS1L20M require a heatsink for 1 A operation?

No external heatsink is required. With its STmite package and Rth(j-c) = 20°C/W, the device relies on PCB copper as the primary thermal path. A 100 mm² 35 µm Cu pour under the cathode pad achieves sufficient cooling for 1 A continuous operation at 75°C ambient.

Can STPS1L20M replace a standard silicon diode in a 5 V output buck converter?

Yes - it replaces 1N5817/1N5819-class diodes directly. At 1 A, its 0.37 V VF cuts conduction loss by ~55% versus a silicon diode (VF ≈ 0.8 V), improving efficiency by 2–3% and reducing thermal stress on adjacent components.

Is STPS1L20M suitable for automotive infotainment power rails?

No - it is not AEC-Q101 qualified. While its 150°C Tj rating meets under-hood temperature requirements, ST does not certify STPS1L20M for automotive use. For such applications, consider ST's AEC-Q101-qualified STPS1L20A variant instead.

STPS1L20M Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: DO-216AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 20 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 430 mV @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 75 µA @ 20 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: STmite

Operating Temperature - Junction:: 150°C (Max)

STPS1L20M FAQ

1.How can I place an order for STPS1L20M through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS1L20M 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 STPS1L20M reliable?

The price and inventory of STPS1L20M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS1L20M is usually 5 days.

3.What payment methods are accepted for STPS1L20M?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS1L20M transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS1L20M?

STPS1L20M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS1L20M 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 STPS1L20M?

For technical support, including STPS1L20M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS1L20M requirements.

6.How does Aetrix verify that STPS1L20M is sourced from the original manufacturer or authorized distributors?

All STPS1L20M 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 STPS1L20M meets industry standards.

7.What is the process for return or replacement of STPS1L20M?

All STPS1L20M units undergo pre-shipment inspection (PSI). If there is an issue with STPS1L20M, 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 STPS1L20M part is unused and in its original packaging.

Return procedure for STPS1L20M:

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…