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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Diodes Incorporated RS1MEWF-7

Name: RS1MEWF-7
Brand: Diodes Incorporated
SKU: RS1MEWF-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: RS1MEWF-7

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: SOD-123F

Datasheet:: RS1MEWF-7.pdf

Description:: Rapid GPP Rectifier SOD123F T&R

Quantity:: RFQ Add To RFQ list

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Inventory:8,154

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Product details

Overview

RS1MEWF-7 from Diodes Incorporated is a 1.0A, 1000V fast recovery surface-mount rectifier in SOD123F package, featuring 240ns typical reverse recovery time, 1.3V max forward voltage at 1A/25°C, and 5µA max reverse leakage at 1000V/25°C. It delivers high surge capability (30A peak), low-profile packaging, and RoHS-compliant green construction for compact power conversion stages.

For engineers reviewing the RS1MEWF-7 datasheet, RS1MEWF-7 pinout, RS1MEWF-7 application, or RS1MEWF-7 equivalent, this device supports high-efficiency AC-DC adaptors, DC-DC converters, switching mode power supplies, and mobile device chargers where fast recovery, low leakage, and thermal robustness are critical.

Technical Context

This fast recovery rectifier employs glass-passivated die construction to ensure stable junction behavior under repetitive surge stress and elevated temperature operation. Its 1000V peak repetitive reverse voltage rating enables use in universal-input offline SMPS front-end rectification without derating in most designs.

The device exhibits 240ns typical reverse recovery time (t_RR) under IF = 0.5A / IR = 1.0A conditions, minimizing switching losses in high-frequency converters. Thermal resistance values-R_θJA = 100°C/W on standard FR-4 PCB-support reliable 1A average current handling at +88°C case temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - Withstands peak reverse voltage in universal AC input rectification without breakdown
I_O	1.0 A - Sustains continuous average forward current at T_T = +88°C with proper PCB copper area
V_F Max	1.3 V @ 1A, 25°C - Limits conduction loss to ≤1.3W per diode in 1A load paths
I_R Max	5 µA @ 1000V, 25°C - Ensures minimal standby power loss in high-impedance hold-up circuits
t_RR	240 ns typical - Reduces switching loss and EMI generation in 100–500kHz SMPS topologies
I_FSM	30 A peak @ 8.3ms - Survives cold-start inrush and line-transient surges without failure
R_θJA	100 °C/W - Requires ≥2.1×2.1 mm² 2oz copper pad for safe 1A operation at ambient ≤75°C

Pinout & Package

Package: SOD123F - Surface-mount, low-profile (max height 1.15 mm), cathode-banded, molded plastic housing with matte tin-plated copper lead-frame; UL 94V-0 rated, MSL Level 1.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to AC input or transformer secondary side; must withstand full surge current path
Cathode	Forward current exit / reverse blocking terminal	Connected to output capacitor or DC bus; carries full load current and defines polarity reference

Key Features

Feature	Design Value
Glass passivated die	Enhances long-term reliability under humidity and thermal cycling by preventing junction contamination
Fast recovery (240 ns typ)	Reduces reverse recovery charge (Q_rr) to <15 nC, lowering switching loss in high-frequency converters
30A non-repetitive surge rating	Supports robust cold-start performance in AC-DC adapters without external fusing or derating
SOD123F footprint	Enables board space reduction vs. SMA/SMB; compatible with automated pick-and-place and reflow profiles
Halogen- and antimony-free "Green" construction	Meets IEC 61249-2-21 and JEDEC J-STD-020 MSL Level 1 for eco-compliant industrial and consumer production

Applications

AC-DC Adapters

DC-DC Converters

Use Scenario: Universal-input (90–264VAC) wall adapters for USB-C PD and legacy 5V/12V devices.

IC Role / Device Role / Timing Role: Primary-side bridge or single-diode output rectifier in flyback or buck-derived topologies.

Use Value: 1000V V_RRM eliminates need for series stacking; 5µA I_R minimizes no-load power consumption below 30mW.

Use Scenario: Secondary-side rectification in isolated 48V-to-12V/5V telecom or server POL converters.

IC Role / Device Role / Timing Role: High-frequency synchronous rectifier replacement where cost-sensitive designs avoid gate-drive complexity.

Use Value: 240ns t_RR limits switching loss at 300kHz, enabling >92% efficiency without active control.

Mobile Chargers

Industrial SMPS

Use Scenario: Compact travel chargers with dual USB-A/USB-C outputs and multi-mode QC/PD negotiation.

IC Role / Device Role / Timing Role: Output rectifier in high-density folded-flyback or active-clamp forward designs.

Use Value: SOD123F package allows <2.0 mm² board area per diode; 1.3V V_F maintains thermal headroom at 1A peak load.

Use Scenario: DIN-rail mounted 24V/48V industrial power supplies for PLCs and sensors.

IC Role / Device Role / Timing Role: Input rectifier in ruggedized offline converters operating continuously at -40°C to +85°C ambient.

Use Value: -55°C to +150°C operating range and 30A I_FSM ensure startup reliability across wide temperature and line-voltage excursions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MUR110SFT1G	Same 1A/1000V rating; 500ns max t_RR (vs. 500ns max for RS1MEWF-7); slightly higher V_F (1.35V)	Higher t_RR increases switching loss above 200kHz; suitable for lower-frequency (<100kHz) industrial supplies	Select when legacy qualification or second-source validation is required; verify thermal margin with R_θJA = 110°C/W
Vishay VS-1EWH01-M3/5AT	1A/1000V; 35ns t_RR (ultrafast); 1.25V V_F; SOD-123FL package (0.9mm height)	Superior t_RR enables >1MHz operation but requires tighter layout due to lower inductance tolerance	Choose for high-frequency, space-constrained designs where 35ns recovery justifies premium cost and layout sensitivity

Compared with MUR110SFT1G and VS-1EWH01-M3/5AT, RS1MEWF-7 offers balanced performance: faster than standard recovery diodes yet more robust against layout-induced ringing than ultrafast variants, making it optimal for cost-sensitive 100–300kHz consumer power supplies.

Availability

RS1MEWF-7 is available at Aetrix Electronics and suitable for AC-DC adapters, DC-DC converters, and mobile chargers requiring stable component supply, RoHS compliance, and automotive-grade reliability (via RS1MEWFQ variant).

Supply support for RS1MEWF-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The RS1MEWF-7 belongs to Diodes' fast recovery rectifier product line, engineered for compact, high-efficiency offline power conversion where low leakage, fast switching, and thermal resilience are essential design requirements.

FAQ

What is the maximum junction temperature for continuous operation?

The RS1MEWF-7 has an operating junction temperature range of –55°C to +150°C. For continuous 1.0A average current, the datasheet specifies derating above +88°C case temperature; thermal design must ensure junction temperature remains ≤+150°C using R_θJA = 100°C/W and appropriate PCB copper area.

Is RS1MEWF-7 suitable for automotive applications?

The RS1MEWF-7 itself is not AEC-Q101 qualified; however, Diodes offers the automotive-compliant RS1MEWFQ variant (same electrical specs, qualified per AEC-Q101). For non-automotive industrial or consumer use, RS1MEWF-7 meets all standard reliability and environmental requirements including MSL Level 1 and RoHS 3 compliance.

How does the SOD123F package compare to SMA in thermal performance?

SOD123F has higher thermal resistance than SMA: R_θJA = 100°C/W (SOD123F) vs. ~65°C/W (SMA on same board). This means SOD123F requires larger copper pads (2.1×2.1 mm² recommended) to achieve equivalent 1A current handling. Its advantage lies in 40% smaller footprint and lower profile-not raw thermal capacity.

Can RS1MEWF-7 replace a 1N4007 in existing designs?

No-RS1MEWF-7 is not a direct replacement for 1N4007. While both are 1A/1000V rectifiers, RS1MEWF-7 is a fast recovery device (240ns t_RR) versus 1N4007's 30µs recovery. Substituting it into 50/60Hz transformer-based supplies may cause excessive ringing or EMI; it is intended only for high-frequency switching applications.

RS1MEWF-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOD-123F

Packaging:: Bulk

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 1000 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 1 A

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

Reverse Recovery Time (trr):: 500 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 1000 V

Capacitance @ Vr, F:: 7pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123F

Operating Temperature - Junction:: -55°C ~ 150°C

RS1MEWF-7 FAQ

1.How can I place an order for RS1MEWF-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for RS1MEWF-7 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 RS1MEWF-7 reliable?

The price and inventory of RS1MEWF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1MEWF-7 is usually 5 days.

3.What payment methods are accepted for RS1MEWF-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1MEWF-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for RS1MEWF-7?

RS1MEWF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your RS1MEWF-7 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 RS1MEWF-7?

For technical support, including RS1MEWF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1MEWF-7 requirements.

6.How does Aetrix verify that RS1MEWF-7 is sourced from the original manufacturer or authorized distributors?

All RS1MEWF-7 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 RS1MEWF-7 meets industry standards.

7.What is the process for return or replacement of RS1MEWF-7?

All RS1MEWF-7 units undergo pre-shipment inspection (PSI). If there is an issue with RS1MEWF-7, 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 RS1MEWF-7 part is unused and in its original packaging.

Return procedure for RS1MEWF-7:

1.Submit a request within 90 days.

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

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