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 > Bridge Rectifiers

Vishay General Semiconductor - Diodes Division VS-26MB140A

Name: VS-26MB140A
Brand: Vishay General Semiconductor - Diodes Division
SKU: VS-26MB140A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: VS-26MB140A

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Bridge Rectifiers

Package:: 4-Square, D-34

Datasheet:: VS-26MB140A.pdf

Description:: BRIDGE RECT 1P 1.4KV 25A D-34

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:59

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

Product details

Overview

VS-26MB140A from Vishay Semiconductors is a single-phase bridge rectifier in D-34 package, rated for 25 A average forward current and 1400 V maximum repetitive peak reverse voltage (V_RRM). It features electrically insulated case, nickel-plated solderable terminals compatible with Pb-free SAC305 alloy, and UL E300359 approval. It delivers reliable AC-to-DC conversion in industrial power supplies and instrumentation front-ends.

For engineers reviewing the VS-26MB140A datasheet, VS-26MB140A pinout, VS-26MB140A application, or VS-26MB140A equivalent, key selection criteria include its 1.7 K/W junction-to-case thermal resistance, 400 A non-repetitive surge rating at 50 Hz, and 2700 V RMS isolation voltage - critical for high-voltage, thermally constrained designs.

Technical Context

The VS-26MB140A implements a full-wave single-phase bridge configuration using four silicon diodes in a compact, encapsulated D-34 housing with electrically isolated baseplate. Its low forward voltage drop (1.25 V at 40 A_pk, T_J = 25 °C) and dual-level threshold/slope characteristics (V_F(TO)1 = 0.70 V, r_t1 = 7.0 mΩ) support efficient conduction across resistive, inductive, and capacitive loads.

Thermal management is enabled by direct-mounting capability via center-hole fixing and specified mounting torque (2.0 Nm), with R_thCS = 0.2 K/W to heatsink under greased, smooth surface conditions. The device operates across -55 °C to +150 °C junction temperature range and supports both 50 Hz and 60 Hz line frequencies.

Key Specifications

Parameter	Value and Actual Design Meaning
Average Forward Current (I_O)	25 A at T_C = 70 °C - defines continuous DC output capability under standard heatsinking
Peak Repetitive Reverse Voltage (V_RRM)	1400 V - sets maximum sustainable AC input voltage before breakdown
Non-Repetitive Surge Current (I_FSM)	400 A at 50 Hz, t = 10 ms - determines short-circuit withstand capability during startup/fault
Junction-to-Case Thermal Resistance (R_thJC)	1.7 K/W - quantifies heat transfer efficiency from die to mounting surface
RMS Isolation Voltage (V_ISOL)	2700 V at 50 Hz, 1 s - certifies safety barrier integrity between terminals and baseplate
Forward Voltage Drop (V_FM)	1.25 V at I_FM = 40 A_pk, T_J = 25 °C - directly impacts conduction loss and thermal load
Maximum Reverse Current (I_RRM)	10 µA at V_RRM, T_J = 25 °C - indicates leakage performance critical for high-impedance circuits

Pinout & Package

D-34 package: rectangular, epoxy-encapsulated, electrically insulated metal baseplate with three terminals - two AC inputs (~) and one common DC output pair (+ and −). Mounting via center hole (M4 thread recommended); terminals accept push-on, wrap-around, or solder termination.

Pin/Terminal	Circuit Role	Design Meaning
~1 / ~2	AC Input Terminals	Accept full-wave AC input; symmetrical connection - no polarity distinction required
+	DC Positive Output	Delivers rectified positive DC voltage; electrically isolated from baseplate
−	DC Negative Output	Delivers rectified negative DC return path; electrically isolated from baseplate

Key Features

Feature	Design Value
Electrically insulated case	Enables direct mounting to grounded heatsinks without additional isolation hardware
UL E300359 approval	Validates compliance with North American safety standards for end-equipment certification
Nickel-plated terminals	Supports Pb-free soldering (SAC305) at 260–275 °C without degradation or dewetting
High power/volume ratio	25 A rating in 28.5 × 20.3 mm footprint enables space-constrained industrial power designs
Center-hole mechanical fixing	Provides secure thermal and mechanical interface with standardized M4 fastener

Applications

Industrial AC/DC Power Supplies	Test & Measurement Instrumentation
Use Scenario: Front-end rectification in 3-phase or single-phase industrial SMPS with 400–690 V AC input. IC Role / Device Role / Timing Role: Single-phase bridge rectifier converting line-frequency AC to unregulated DC bus. Use Value: 1400 V V_RRM and 400 A I_FSM ensure robust operation during line surges and brownouts.	Use Scenario: Precision AC signal conditioning and power conversion in benchtop multimeters and oscilloscope power sections. IC Role / Device Role / Timing Role: High-isolation bridge rectifier providing clean, low-leakage DC rails for analog front-ends. Use Value: 10 µA I_RRM and 2700 V V_ISOL minimize measurement error and enhance user safety.
Motor Drive Control Boards	Uninterruptible Power Systems (UPS)
Use Scenario: Auxiliary power supply rectification in HVAC and pump VFD control modules. IC Role / Device Role / Timing Role: Compact, thermally efficient bridge supplying gate driver and logic rails. Use Value: 1.7 K/W R_thJC and 25 A I_O enable stable operation without oversized heatsinks in enclosed enclosures.	Use Scenario: Line-interactive UPS input stage handling utility AC and battery backup switching. IC Role / Device Role / Timing Role: High-reliability bridge rectifier supporting bidirectional energy flow and surge immunity. Use Value: UL E300359 approval and 50/60 Hz I_FSM ratings meet EN/IEC 62040-1 safety and performance requirements.

Industrial AC/DC Power Supplies

Test & Measurement Instrumentation

Use Scenario: Front-end rectification in 3-phase or single-phase industrial SMPS with 400–690 V AC input.

IC Role / Device Role / Timing Role: Single-phase bridge rectifier converting line-frequency AC to unregulated DC bus.

Use Value: 1400 V V_RRM and 400 A I_FSM ensure robust operation during line surges and brownouts.

Use Scenario: Precision AC signal conditioning and power conversion in benchtop multimeters and oscilloscope power sections.

IC Role / Device Role / Timing Role: High-isolation bridge rectifier providing clean, low-leakage DC rails for analog front-ends.

Use Value: 10 µA I_RRM and 2700 V V_ISOL minimize measurement error and enhance user safety.

Motor Drive Control Boards

Uninterruptible Power Systems (UPS)

Use Scenario: Auxiliary power supply rectification in HVAC and pump VFD control modules.

IC Role / Device Role / Timing Role: Compact, thermally efficient bridge supplying gate driver and logic rails.

Use Value: 1.7 K/W R_thJC and 25 A I_O enable stable operation without oversized heatsinks in enclosed enclosures.

Use Scenario: Line-interactive UPS input stage handling utility AC and battery backup switching.

IC Role / Device Role / Timing Role: High-reliability bridge rectifier supporting bidirectional energy flow and surge immunity.

Use Value: UL E300359 approval and 50/60 Hz I_FSM ratings meet EN/IEC 62040-1 safety and performance requirements.

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-26MB160A	Higher V_RRM = 1600 V; identical I_O, package, and thermal specs	Required where line transients exceed 1400 V or design margin mandates >15 % voltage headroom	Select VS-26MB160A when system-level overvoltage testing requires ≥1600 V rating
ON Semiconductor GBPC2514	DIP-4 package (not isolated); lower I_FSM = 350 A; V_RRM = 1400 V; no UL approval	Suitable only for non-safety-critical, PCB-mounted applications with adequate creepage/clearance	Choose GBPC2514 only if isolation and UL certification are not required and board space permits larger DIP footprint

Compared with VS-26MB140A, VS-26MB160A offers higher voltage margin without thermal or layout trade-offs, while GBPC2514 sacrifices isolation, safety certification, and surge robustness for cost and simplicity in low-risk environments.

Availability

VS-26MB140A is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, test & measurement instrumentation, and motor drive control boards requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for VS-26MB140A 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-handling capability.

The VS-MB High Voltage Series, including VS-26MB140A, was designed for rugged industrial and instrumentation applications demanding high-voltage isolation, thermal resilience, and safety-certified construction.

FAQ

What is the maximum allowable case temperature for VS-26MB140A?

The maximum allowable case temperature (T_C) for VS-26MB140A is 70 °C at its rated 25 A average forward current. Exceeding this temperature reduces safe operating current per derating curves in the datasheet. Maintaining T_C ≤ 70 °C ensures long-term reliability and prevents thermal runaway. The VS-26MB140A junction temperature remains within its -55 °C to +150 °C range when proper heatsinking is applied per its 1.7 K/W R_thJC specification.

Is VS-26MB140A compatible with lead-free soldering processes?

Yes, VS-26MB140A features nickel-plated terminals qualified for Pb-free soldering using Sn/Ag/Cu (SAC305) alloy at peak temperatures of 260–275 °C. The terminals withstand standard reflow profiles without oxidation or dewetting. This compatibility is explicitly verified in Vishay's qualification testing and documented in the 93564 datasheet. Engineers can use VS-26MB140A in RoHS-compliant manufacturing without process modification.

Does VS-26MB140A provide electrical isolation between terminals and baseplate?

Yes, VS-26MB140A has an electrically insulated case with 2700 V RMS isolation voltage (V_ISOL) between all terminals and the metal baseplate at 50 Hz for 1 second. This isolation allows direct mounting to grounded heatsinks without additional insulating hardware. The VS-26MB140A D-34 package is specifically engineered for safety-critical applications where creepage and clearance must be maintained without external barriers.

What is the surge current rating of VS-26MB140A at 60 Hz?

VS-26MB140A is rated for 420 A non-repetitive peak forward surge current (I_FSM) at 60 Hz with t = 8.3 ms and initial junction temperature at maximum (150 °C). This rating applies when no voltage is reapplied after the surge. If rated V_RRM is reapplied post-surge, the limit drops to 350 A. These values are measured per JEDEC standards and confirmed in the VS-26MB140A datasheet section "MAJOR RATINGS AND CHARACTERISTICS".

Can VS-26MB140A be used in capacitive-load applications?

Yes, VS-26MB140A supports capacitive-load operation with a derated average forward current of 20 A (vs. 25 A for resistive/inductive loads) at T_C = 65 °C. This derating accounts for higher peak currents and increased thermal stress caused by capacitor charging transients. The VS-26MB140A datasheet explicitly specifies this condition in the "FORWARD CONDUCTION" table, confirming its suitability for switch-mode power supply input stages with bulk capacitance.

VS-26MB140A 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):: 1.4 kV

Current - Average Rectified (Io):: 25 A

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

Current - Reverse Leakage @ Vr:: 10 µA @ 1400 V

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

Grade:: -

Qualification:: -

Mounting Type:: QC Terminal

Supplier Device Package:: D-34

VS-26MB140A FAQ

1.How can I place an order for VS-26MB140A through Aetrix?

Please submit a Request for Quotation (RFQ) for VS-26MB140A 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-26MB140A reliable?

The price and inventory of VS-26MB140A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VS-26MB140A is usually 5 days.

3.What payment methods are accepted for VS-26MB140A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-26MB140A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VS-26MB140A?

VS-26MB140A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VS-26MB140A 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-26MB140A?

For technical support, including VS-26MB140A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-26MB140A requirements.

6.How does Aetrix verify that VS-26MB140A is sourced from the original manufacturer or authorized distributors?

All VS-26MB140A 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-26MB140A meets industry standards.

7.What is the process for return or replacement of VS-26MB140A?

All VS-26MB140A units undergo pre-shipment inspection (PSI). If there is an issue with VS-26MB140A, 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-26MB140A part is unused and in its original packaging.

Return procedure for VS-26MB140A:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-11 Comparator Circuit: Voltage Thresholds, Op-Amp Differences, LM393 and Practical Design

Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

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 …