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Home > Products > Discrete Semiconductor Products > Diodes > Bridge Rectifiers

Vishay General Semiconductor - Diodes Division VS-26MB20A

Name: VS-26MB20A
Brand: Vishay General Semiconductor - Diodes Division
SKU: VS-26MB20A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: VS-26MB20A

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Bridge Rectifiers

Package:: 4-Square, D-34

Datasheet:: VS-26MB20A.pdf

Description:: BRIDGE RECT 1PHASE 200V 25A D-34

Quantity:: RFQ Add To RFQ list

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Inventory:45

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Product details

Overview

VS-26MB20A from Vishay Semiconductors is a single-phase bridge rectifier with 25 A average forward current, 200 V maximum repetitive peak reverse voltage (V_RRM), and D-34 package featuring electrically insulated case and center-hole mounting. It delivers reliable AC-to-DC conversion in industrial power supplies and instrumentation front-end rectification stages.

For engineers reviewing the VS-26MB20A datasheet, VS-26MB20A pinout, VS-26MB20A application, or VS-26MB20A equivalent, key selection criteria include thermal resistance (R_thJC = 1.7 K/W), I²t rating (790 A²s at 10 ms), UL E300359 approval, and compatibility with Pb-free soldering at 260–275 °C.

Technical Context

The VS-26MB20A implements a full-wave single-phase bridge configuration using four silicon diodes integrated into a compact, thermally optimized D-34 package. Its electrically insulated case enables direct heatsink mounting without isolation hardware, while the universal 3-way terminals support push-on, wrap-around, or solder termination.

Designed for industrial-level reliability, it operates across -55 °C to +150 °C junction temperature range and sustains 400 A non-repetitive surge current (t = 10 ms, no voltage reapplied) with low forward voltage drop (V_FM = 1.11 V at 40 A_pk, T_J = 25 °C).

Key Specifications

Parameter	Value and Actual Design Meaning
I_O	25 A average forward current - supports continuous DC output in 100–240 VAC input power supplies
V_RRM	200 V - withstands peak reverse voltage in 140 VAC RMS applications with safety margin
R_thJC	1.7 K/W - enables efficient heat transfer to heatsink for stable operation at full load
I²t	790 A²s (10 ms, no voltage reapplied) - defines fusing threshold during short-circuit events
V_FM	1.11 V at 40 A_pk, 25 °C - determines conduction loss and thermal rise under typical surge conditions
V_INS	2700 V RMS isolation - ensures safe galvanic separation between baseplate and internal circuitry
T_J Range	-55 °C to +150 °C - qualified for harsh industrial environments including motor drives and PLC power stages

Pinout & Package

D-34 package: molded plastic body with electrically insulated metal baseplate, center mounting hole (M4), and three-terminal AC/DC interface (two AC inputs, one common positive, one common negative). Dimensions: 28.5 × 20.3 × 12.7 mm (L × W × H).

Pin/Terminal	Circuit Role	Design Meaning
AC1	AC Input Terminal 1	One leg of AC input; connects to transformer secondary or line filter output
AC2	AC Input Terminal 2	Second leg of AC input; completes full-wave bridge input path
(+) / Cathode Common	DC Positive Output	Full-wave rectified positive output node; ties to bulk capacitor or regulator input
(-) / Anode Common	DC Negative Output	Full-wave rectified negative output node; serves as system ground reference point

Key Features

Feature	Design Value
UL E300359 certified	Meets North American safety standards for industrial equipment without additional isolation barriers
Electrically insulated case	Eliminates need for insulating washers or pads when mounted directly to heatsink
Three-terminal mounting flexibility	Supports push-on, wrap-around, or solder termination - simplifies assembly across production methods
Pb-free solder compatible	Rated for SAC305 reflow at 260–275 °C - compliant with RoHS and IPC-J-STD-020
High power/volume ratio	Delivers 25 A average current in 7.3 cm³ volume - reduces footprint vs. discrete diode solutions

Applications

Industrial Power Supplies	Test & Measurement Equipment
Use Scenario: AC/DC front-end rectification in programmable DC power supplies rated up to 3 kW. IC Role / Device Role / Timing Role: Single-phase bridge rectifier converting 115/230 VAC mains to unregulated DC bus. Use Value: Low R_thJC (1.7 K/W) and high I_FSM (400 A) ensure stable operation during load transients and brownouts.	Use Scenario: Precision AC signal conditioning and rectification in digital multimeters and oscilloscope power sections. IC Role / Device Role / Timing Role: Full-wave rectifier providing clean, low-noise DC rails for analog front-ends and ADC references. Use Value: Ultra-low I_RRM (10 μA at 25 °C) minimizes leakage-induced measurement drift in high-impedance circuits.
Motor Drive Control Boards	PLC Power Modules
Use Scenario: DC bus generation for 3-phase inverter stages in HVAC and pump controllers. IC Role / Device Role / Timing Role: Primary rectifier feeding bulk capacitor bank prior to IGBT gate driver and control logic supply. Use Value: 150 °C max junction temperature and robust I²t rating enable reliable operation in enclosed, convection-cooled enclosures.	Use Scenario: Embedded 24 VDC power conversion in modular PLC backplanes with space-constrained layouts. IC Role / Device Role / Timing Role: Compact, insulated bridge rectifier delivering isolated DC input for internal DC/DC converters. Use Value: D-34 package with center-hole mounting allows secure mechanical attachment and repeatable thermal interface in high-vibration environments.

Industrial Power Supplies

Test & Measurement Equipment

Use Scenario: AC/DC front-end rectification in programmable DC power supplies rated up to 3 kW.

IC Role / Device Role / Timing Role: Single-phase bridge rectifier converting 115/230 VAC mains to unregulated DC bus.

Use Value: Low R_thJC (1.7 K/W) and high I_FSM (400 A) ensure stable operation during load transients and brownouts.

Use Scenario: Precision AC signal conditioning and rectification in digital multimeters and oscilloscope power sections.

IC Role / Device Role / Timing Role: Full-wave rectifier providing clean, low-noise DC rails for analog front-ends and ADC references.

Use Value: Ultra-low I_RRM (10 μA at 25 °C) minimizes leakage-induced measurement drift in high-impedance circuits.

Motor Drive Control Boards

PLC Power Modules

Use Scenario: DC bus generation for 3-phase inverter stages in HVAC and pump controllers.

IC Role / Device Role / Timing Role: Primary rectifier feeding bulk capacitor bank prior to IGBT gate driver and control logic supply.

Use Value: 150 °C max junction temperature and robust I²t rating enable reliable operation in enclosed, convection-cooled enclosures.

Use Scenario: Embedded 24 VDC power conversion in modular PLC backplanes with space-constrained layouts.

IC Role / Device Role / Timing Role: Compact, insulated bridge rectifier delivering isolated DC input for internal DC/DC converters.

Use Value: D-34 package with center-hole mounting allows secure mechanical attachment and repeatable thermal interface in high-vibration environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-phase bridge rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-26MB100A	V_RRM = 1000 V; same I_O (25 A), R_thJC (1.7 K/W), and D-34 package	Suitable for 700 VAC input systems (e.g., three-phase rectification via wye-delta transformers)	Select VS-26MB100A only when reverse voltage stress exceeds 200 V - no change to thermal or layout design required
ON Semiconductor GBPC2502	V_RRM = 200 V; I_O = 25 A; GBPC package (larger footprint, higher R_thJC = 2.0 K/W)	Requires larger PCB area and enhanced heatsinking due to lower thermal efficiency	Choose GBPC2502 only if D-34 mounting constraints prevent VS-26MB20A use - expect ~17% higher junction temperature at full load

Compared with VS-26MB100A and GBPC2502, the VS-26MB20A offers optimal balance of voltage rating, thermal performance, and board space for standard 100–240 VAC industrial inputs - its 1.7 K/W R_thJC and UL certification reduce system-level qualification effort.

Availability

VS-26MB20A is available at Aetrix Electronics and suitable for industrial power supplies, test & measurement equipment, motor drive control boards, and PLC power modules requiring stable component supply and long-term lifecycle support.

Supply support for VS-26MB20A 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

Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements, with emphasis on reliability, precision, and power efficiency.

The VS-MB series was developed specifically for industrial-grade AC/DC conversion, targeting applications demanding high surge immunity, electrical isolation, and simplified thermal management in compact form factors.

FAQ

What is the maximum allowable case temperature for VS-26MB20A at full 25 A load?

The maximum allowable case temperature (T_C) for VS-26MB20A is 65 °C when operating at its rated 25 A average forward current with resistive or inductive loads. This value is specified in the Major Ratings table and reflects thermal limits before derating begins. Exceeding 65 °C requires current reduction per the derating curve in Figure 1. The VS-26MB20A must be mounted to a heatsink capable of maintaining this temperature under worst-case ambient and airflow conditions.

Does VS-26MB20A support lead-free soldering processes?

Yes, VS-26MB20A is qualified for lead-free soldering using Sn/Ag/Cu (SAC305) alloy at peak temperatures of 260–275 °C. Its nickel-plated terminals are designed for compatibility with standard reflow profiles per IPC-J-STD-020. The VS-26MB20A datasheet explicitly states this capability and confirms compliance with RoHS Directive 2011/65/EU. No special pre-treatment or flux is required beyond standard Pb-free assembly practices.

What is the isolation voltage rating of VS-26MB20A's baseplate?

The VS-26MB20A provides 2700 V RMS isolation voltage (V_INS) between its electrically insulated metal baseplate and internal semiconductor die, tested at 50 Hz for 1 second. This rating enables safe mounting to grounded heatsinks without additional insulation hardware. The VS-26MB20A's isolation meets industrial safety requirements and eliminates risk of ground loops or shock hazards in Class I equipment designs.

Can VS-26MB20A be used in capacitive-load applications?

Yes, VS-26MB20A supports capacitive-load operation but with reduced current rating: 20 A maximum average forward current (versus 25 A for resistive/inductive loads), as specified in the Forward Conduction table. This derating accounts for higher peak currents and increased thermal stress caused by capacitor charging surges. The VS-26MB20A remains suitable for bulk-capacitor input stages in switch-mode power supplies when operated within this limit and paired with appropriate inrush limiting.

What is the I²t rating for VS-26MB20A under non-repetitive surge conditions?

The VS-26MB20A has an I²t rating of 790 A²s for a 10 ms surge duration with no voltage reapplied, and 560 A²s when 100 % V_RRM is reapplied after the surge. These values define the device's fusing threshold and are critical for coordinating upstream fuse selection. The VS-26MB20A's I²t performance ensures robustness against line transients and short-circuit events in industrial power systems.

VS-26MB20A Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: -

Package/Case:: 4-Square, D-34

Packaging:: Bulk

Product Status:: Active

Diode Type:: Single Phase

Technology:: Standard

Voltage - Peak Reverse (Max):: 200 V

Current - Average Rectified (Io):: 25 A

Voltage - Forward (Vf) (Max) @ If:: -

Current - Reverse Leakage @ Vr:: 10 µA @ 200 V

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: QC Terminal

Supplier Device Package:: D-34

VS-26MB20A FAQ

1.How can I place an order for VS-26MB20A through Aetrix?

Please submit a Request for Quotation (RFQ) for VS-26MB20A 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 VS-26MB20A reliable?

The price and inventory of VS-26MB20A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VS-26MB20A is usually 5 days.

3.What payment methods are accepted for VS-26MB20A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-26MB20A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VS-26MB20A?

VS-26MB20A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VS-26MB20A 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 VS-26MB20A?

For technical support, including VS-26MB20A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-26MB20A requirements.

6.How does Aetrix verify that VS-26MB20A is sourced from the original manufacturer or authorized distributors?

All VS-26MB20A 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 VS-26MB20A meets industry standards.

7.What is the process for return or replacement of VS-26MB20A?

All VS-26MB20A units undergo pre-shipment inspection (PSI). If there is an issue with VS-26MB20A, 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 VS-26MB20A part is unused and in its original packaging.

Return procedure for VS-26MB20A:

1.Submit a request within 90 days.

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

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