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

Vishay General Semiconductor - Diodes Division SSA24-M3/5AT

Name: SSA24-M3/5AT
Brand: Vishay General Semiconductor - Diodes Division
SKU: SSA24-M3/5AT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SSA24-M3/5AT

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: SSA24-M3/5AT.pdf

Description:: DIODE SCHOTTKY 40V 2A DO214AC

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Product details

Overview

SSA24-M3/5AT from Vishay General Semiconductor is a high-current-density surface-mount Schottky rectifier in SMA (DO-214AC) package, rated for 40 V repetitive peak reverse voltage, 2.0 A average forward current, and 60 A non-repetitive surge current; it delivers 0.42 V typical forward voltage at 2.0 A and 125 °C, enabling high-efficiency DC/DC conversion in space-constrained power supplies.

For engineers reviewing the SSA24-M3/5AT datasheet, SSA24-M3/5AT pinout, SSA24-M3/5AT application, or SSA24-M3/5AT equivalent, key selection criteria include its low VF at elevated temperature, MSL Level 1 solderability, halogen-free RoHS-compliant construction, and validated avalanche energy rating of 11.25 mJ under defined test conditions.

Technical Context

This Schottky rectifier uses a planar junction structure with integrated guardring to suppress edge breakdown and improve overvoltage robustness. Its low forward voltage drop stems from optimized metal-semiconductor interface design and low-resistance epitaxial layer, supporting high-frequency switching topologies without significant conduction loss penalty.

The device operates across -65 °C to +150 °C junction temperature range and exhibits 28 °C/W typical junction-to-lead thermal resistance when mounted on aluminum substrate-critical for thermal management in compact DC/DC modules where lead-frame conduction dominates heat dissipation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum repetitive reverse blocking capability; defines upper limit for input voltage in buck or flyback secondary-side rectification
I_F(AV)	2.0 A - Continuous DC output current rating at specified lead temperature; determines minimum heatsinking requirement in steady-state operation
I_FSM	60 A - Peak surge current tolerance for 8.3 ms half-sine; supports inrush and fault-current handling in power converters
V_F @ 2.0 A, 125 °C	0.42 V - Confirmed forward voltage under worst-case thermal condition; directly impacts conduction loss and efficiency at full load and high ambient
E_AS	11.25 mJ - Non-repetitive avalanche energy rating at I_AS = 1.5 A, L = 10 mH; quantifies ruggedness against transient overvoltage events
R_θJL	28 °C/W - Junction-to-lead thermal resistance; enables accurate thermal modeling when PCB copper area is limited and heatsinking relies on lead-frame conduction

Pinout & Package

Package: SMA (DO-214AC), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards; M3 suffix indicates halogen-free, RoHS-compliant, commercial-grade construction.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal under forward bias	Connected to lower-potential node (e.g., switch node in synchronous rectification); must be routed with low-inductance path to minimize ringing
Cathode	Current exit terminal under forward bias	Marked by color band; ties to output rail or ground return; polarity error prevents conduction and risks system failure

Key Features

Feature	Design Value
Guardring protection	Prevents premature edge breakdown under high dV/dt transients, improving reliability in fast-switching converters with >10 kV/μs voltage slew rates
MSL Level 1 rating	Enables single-reflow assembly without moisture sensitivity concerns; peak reflow temperature up to 260 °C permitted per J-STD-020
Low VF at 125 °C	0.42 V ensures <1.7 W conduction loss at 2.0 A, reducing thermal stress in enclosed industrial power modules
Halogen-free & RoHS	M3 suffix confirms compliance with environmental directives and material restrictions required for EU and global commercial electronics

Applications

DC/DC Converter Secondary Rectification	Freewheeling Diode in Synchronous Buck
Use Scenario: Used as output rectifier in isolated 12 V → 5 V flyback converter operating at 250 kHz. IC Role / Device Role / Timing Role: Unidirectional current path during transformer demagnetization phase; conducts only when secondary winding voltage exceeds output rail. Use Value: 0.42 V V_F at 125 °C reduces conduction loss by ~18 % versus comparable 0.51 V diodes, improving full-load efficiency from 89.2 % to 90.7 %.	Use Scenario: Placed across low-side MOSFET in 48 V → 12 V synchronous buck regulator for telecom power shelf. IC Role / Device Role / Timing Role: Provides current recirculation path during high-side switch off-time; clamps inductive kickback to prevent voltage overshoot. Use Value: 60 A I_FSM withstands transient surges during load dump, while 11.25 mJ E_AS absorbs energy from 10 mH parasitic inductance without failure.
Polarity Protection in 24 V Industrial Input	Low-Voltage Inverter Freewheeling
Use Scenario: Installed in series with 24 V DC input of PLC I/O module to block reverse connection. IC Role / Device Role / Timing Role: Forward-biased during correct polarity; blocks >40 V reverse voltage if supply is inverted. Use Value: 40 V V_RRM provides 67 % margin above 24 V nominal, accommodating line transients up to ±15 V without breakdown.	Use Scenario: Embedded in H-bridge motor driver for 12 V BLDC fan, conducting freewheeling current during PWM dead time. IC Role / Device Role / Timing Role: Clamps back-EMF spikes during MOSFET turn-off; operates in high-frequency intermittent conduction mode. Use Value: 10,000 V/μs dV/dt rating ensures stable blocking during rapid voltage transitions, eliminating false turn-on in noisy motor drive environments.

DC/DC Converter Secondary Rectification

Freewheeling Diode in Synchronous Buck

Use Scenario: Used as output rectifier in isolated 12 V → 5 V flyback converter operating at 250 kHz.

IC Role / Device Role / Timing Role: Unidirectional current path during transformer demagnetization phase; conducts only when secondary winding voltage exceeds output rail.

Use Value: 0.42 V V_F at 125 °C reduces conduction loss by ~18 % versus comparable 0.51 V diodes, improving full-load efficiency from 89.2 % to 90.7 %.

Use Scenario: Placed across low-side MOSFET in 48 V → 12 V synchronous buck regulator for telecom power shelf.

IC Role / Device Role / Timing Role: Provides current recirculation path during high-side switch off-time; clamps inductive kickback to prevent voltage overshoot.

Use Value: 60 A I_FSM withstands transient surges during load dump, while 11.25 mJ E_AS absorbs energy from 10 mH parasitic inductance without failure.

Polarity Protection in 24 V Industrial Input

Low-Voltage Inverter Freewheeling

Use Scenario: Installed in series with 24 V DC input of PLC I/O module to block reverse connection.

IC Role / Device Role / Timing Role: Forward-biased during correct polarity; blocks >40 V reverse voltage if supply is inverted.

Use Value: 40 V V_RRM provides 67 % margin above 24 V nominal, accommodating line transients up to ±15 V without breakdown.

Use Scenario: Embedded in H-bridge motor driver for 12 V BLDC fan, conducting freewheeling current during PWM dead time.

IC Role / Device Role / Timing Role: Clamps back-EMF spikes during MOSFET turn-off; operates in high-frequency intermittent conduction mode.

Use Value: 10,000 V/μs dV/dt rating ensures stable blocking during rapid voltage transitions, eliminating false turn-on in noisy motor drive environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SSA24-M3/61T	Same die and electrical specs; differs only in tape-and-reel packaging (1800 pcs vs. 7500 pcs per reel)	No functional difference; choice depends solely on production volume and feeder compatibility	Select SSA24-M3/5AT for high-volume automated assembly requiring 13″ reels and optimized changeover efficiency
MBR240SFT3G	40 V V_RRM, 2.0 A I_F(AV), but VF = 0.52 V @ 2.0 A, 125 °C; R_θJL = 35 °C/W; no documented E_AS rating	Higher conduction loss and reduced thermal performance; unsuitable for thermally constrained or high-reliability avalanche-prone designs	Choose SSA24-M3/5AT where efficiency >90 % at full load or transient energy absorption is required

Compared with SSA24-M3/61T, SSA24-M3/5AT offers identical electrical behavior with higher reel quantity for cost-efficient large-batch manufacturing; versus MBR240SFT3G, SSA24-M3/5AT delivers lower VF, better thermal resistance, and verified avalanche ruggedness-making it preferable for high-efficiency, high-reliability 24–48 V power rails.

Availability

SSA24-M3/5AT is available at Aetrix Electronics and suitable for DC/DC converters, freewheeling circuits, and polarity protection applications requiring stable component supply, consistent MSL Level 1 handling, and halogen-free RoHS compliance.

Supply support for SSA24-M3/5AT 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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and optoelectronics with emphasis on high-reliability, high-efficiency power solutions.

The SSA24-M3/5AT belongs to Vishay's high-current-density Schottky rectifier product line, engineered for low-voltage, high-frequency power conversion in space-constrained industrial and computing power supplies.

FAQ

What is the maximum junction temperature rating for the SSA24-M3/5AT?

The SSA24-M3/5AT has a maximum operating junction temperature of +150 °C, verified per datasheet Document Number 89280. This rating allows continuous operation in high-ambient environments such as enclosed power supplies or industrial control cabinets. Derating curves in Figure 1 confirm usable current capacity down to 1.2 A at 125 °C lead temperature. The SSA24-M3/5AT must be mounted per recommended pad layout to sustain this rating.

Does the SSA24-M3/5AT have a specified avalanche energy rating?

Yes, the SSA24-M3/5AT is rated for 11.25 mJ non-repetitive avalanche energy (E_AS) at T_A = 25 °C, I_AS = 1.5 A, and L = 10 mH, as specified in the "Maximum Ratings" table. This value reflects tested ruggedness against transient overvoltage events in inductive switching circuits. The SSA24-M3/5AT's guardring design contributes to this validated energy absorption capability.

What does the "M3/5AT" suffix indicate in SSA24-M3/5AT?

The "M3" suffix denotes halogen-free, RoHS-compliant, commercial-grade construction meeting JESD201 Class 2 whisker resistance. "5AT" specifies the packaging: 13-inch diameter plastic tape-and-reel containing 7500 units, optimized for high-speed pick-and-place machines. The SSA24-M3/5AT shares identical electrical and thermal characteristics with other M3-suffix variants like SSA24-M3/61T-the only difference is reel size and quantity.

Is the SSA24-M3/5AT suitable for reflow soldering at 260 °C?

Yes, the SSA24-M3/5AT meets MSL Level 1 per J-STD-020, permitting exposure to peak reflow temperatures up to 260 °C without preconditioning. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for solderability. The SSA24-M3/5AT's molding compound is UL 94 V-0 rated, ensuring flame resistance during reflow. Always follow Vishay's recommended thermal profile to avoid mechanical stress.

How does the forward voltage of SSA24-M3/5AT compare at 25 °C versus 125 °C?

At 2.0 A, the SSA24-M3/5AT exhibits 0.45 V typical V_F at 25 °C and 0.42 V at 125 °C-demonstrating negative temperature coefficient behavior typical of Schottky diodes. This reduction improves efficiency under thermal stress. The datasheet confirms max V_F values of 0.49 V (25 °C) and 0.42 V (125 °C), making the SSA24-M3/5AT especially effective in thermally demanding applications.

SSA24-M3/5AT Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 40 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 490 mV @ 2 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 200 µA @ 40 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

Operating Temperature - Junction:: -65°C ~ 150°C

SSA24-M3/5AT FAQ

1.How can I place an order for SSA24-M3/5AT through Aetrix?

Please submit a Request for Quotation (RFQ) for SSA24-M3/5AT 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 SSA24-M3/5AT reliable?

The price and inventory of SSA24-M3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SSA24-M3/5AT is usually 5 days.

3.What payment methods are accepted for SSA24-M3/5AT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SSA24-M3/5AT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SSA24-M3/5AT?

SSA24-M3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SSA24-M3/5AT 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 SSA24-M3/5AT?

For technical support, including SSA24-M3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SSA24-M3/5AT requirements.

6.How does Aetrix verify that SSA24-M3/5AT is sourced from the original manufacturer or authorized distributors?

All SSA24-M3/5AT 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 SSA24-M3/5AT meets industry standards.

7.What is the process for return or replacement of SSA24-M3/5AT?

All SSA24-M3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with SSA24-M3/5AT, 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 SSA24-M3/5AT part is unused and in its original packaging.

Return procedure for SSA24-M3/5AT:

1.Submit a request within 90 days.

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

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