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

Vishay General Semiconductor - Diodes Division SS3P4HM3/85A

Name: SS3P4HM3/85A
Brand: Vishay General Semiconductor - Diodes Division
SKU: SS3P4HM3/85A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SS3P4HM3/85A

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Diodes

Package:: DO-220AA

Datasheet:: SS3P4HM3/85A.pdf

Description:: DIODE SCHOTTKY 40V 3A DO220AA

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Inventory:10,000

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Product details

Overview

SS3P4HM3/85A from Vishay General Semiconductor is an AEC-Q101-qualified surface-mount Schottky barrier rectifier in SMP (DO-220AA) package, rated for 4 A average forward current, 40 V peak reverse voltage, and 0.43 V forward voltage at 3 A and 125 °C. It delivers low thermal resistance (R_θJL = 15 °C/W), high surge capability (I_FSM = 60 A), and is used in automotive DC/DC converters for polarity protection and freewheeling.

For engineers reviewing the SS3P4HM3/85A datasheet, SS3P4HM3/85A pinout, SS3P4HM3/85A application, or SS3P4HM3/85A equivalent, key selection criteria include its automotive-grade qualification, 150 °C maximum junction temperature, 1.0 mm profile, halogen-free RoHS-compliant construction, and SMP package compatibility with automated placement.

Technical Context

This Schottky rectifier uses a planar metal-silicon junction to achieve low forward voltage and fast switching with no minority-carrier storage delay. Its single-diode configuration supports unidirectional current flow with cathode band polarity marking and operates reliably from –55 °C to +150 °C.

Designed for high-frequency power conversion, it exhibits 130 pF typical junction capacitance at 4.0 V/1 MHz and withstands 10,000 V/μs voltage transients. The device meets MSL level 1 per J-STD-020 and passes JESD 201 class 2 whisker testing for automotive-grade reliability.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum reverse blocking voltage before breakdown; sets upper limit for DC bus or output rail voltage in automotive DC/DC stages.
I_F(AV)	4.0 A - Continuous forward current rating at 75 °C PCB temperature; defines steady-state power delivery capacity in compact layouts.
V_F @ 3 A, 125 °C	0.43 V - Confirmed forward drop under hot, loaded conditions; directly reduces conduction loss and improves system efficiency.
I_FSM	60 A - Peak non-repetitive surge current (8.3 ms half-sine); enables robust handling of inrush and fault transients in vehicle subsystems.
E_AS	13.5 mJ - Non-repetitive avalanche energy at T_J = 25 °C, I_AS = 1.5 A, L = 10 mH; quantifies ruggedness against inductive switching stress.
R_θJL	15 °C/W - Thermal resistance from junction to lead; enables accurate thermal modeling when mounted on 5 mm × 5 mm copper pad.
T_J max.	150 °C - Maximum allowable junction temperature; supports operation in under-hood environments without derating penalties.

Pinout & Package

Package: SMP (DO-220AA), ultra-low-profile surface-mount case with matte tin-plated terminals, 1.0 mm typical height, UL 94 V-0 molding compound, and cathode band marking.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal	Connected to input/source side of rectification path; must be routed with adequate copper area for 4 A continuous current.
Cathode	Current exit terminal	Marked by color band; connects to load/ground side; serves as thermal interface point (R_θJL measured here).

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD; required for under-hood and ADAS power rails.
Halogen-free, RoHS-compliant	Meets automotive environmental compliance mandates (e.g., ELV, REACH); eliminates brominated flame retardants in molding compound.
MSL Level 1	Rated for reflow up to 260 °C peak without preconditioning; compatible with standard SMT assembly lines without moisture sensitivity concerns.
Low R_θJL (15 °C/W)	Enables direct thermal coupling to PCB copper; reduces need for additional heatsinking in space-constrained modules like body control units.
1.0 mm profile	Minimizes board stack height in multi-layer automotive ECUs; supports mechanical clearance under shields or connectors.

Applications

Automotive DC/DC Converters	Polarity Protection Circuits
Use Scenario: Step-down conversion from 12 V battery to 5 V/3.3 V for infotainment and gateway ECUs. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck converter topology, conducting during high-side switch off-time. Use Value: 0.43 V V_F at 125 °C reduces conduction loss by ~18 % vs. comparable 0.52 V parts, improving thermal margin in sealed enclosures.	Use Scenario: Reverse-voltage protection on 12 V supply inputs of telematics control units (TCUs). IC Role / Device Role / Timing Role: Series-blocking diode preventing damage during battery jump-start or incorrect cable connection. Use Value: 40 V V_RRM provides 3× margin over nominal 12 V systems, accommodating load-dump transients up to ISO 7637-2 Pulse 5a.
Engine Control Module Power Rails	ADAS Camera Power Supplies
Use Scenario: Input rectification and hold-up in 5 V auxiliary supplies for engine control units operating near exhaust manifolds. IC Role / Device Role / Timing Role: Output rectifier in isolated flyback or buck-boost converter powering microcontroller and sensor interfaces. Use Value: 150 °C T_J max and AEC-Q101 qualification ensure stable operation at ambient temperatures exceeding 105 °C in proximity to hot zones.	Use Scenario: Power conditioning for 3.3 V image sensor rails in surround-view camera modules mounted behind grilles. IC Role / Device Role / Timing Role: Low-noise freewheeling element minimizing voltage ripple during high-current LED flash pulses. Use Value: 130 pF C_J limits capacitive coupling into analog sensor paths, preserving signal integrity in high-resolution imaging chains.

Automotive DC/DC Converters

Polarity Protection Circuits

Use Scenario: Step-down conversion from 12 V battery to 5 V/3.3 V for infotainment and gateway ECUs.

IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck converter topology, conducting during high-side switch off-time.

Use Value: 0.43 V V_F at 125 °C reduces conduction loss by ~18 % vs. comparable 0.52 V parts, improving thermal margin in sealed enclosures.

Use Scenario: Reverse-voltage protection on 12 V supply inputs of telematics control units (TCUs).

IC Role / Device Role / Timing Role: Series-blocking diode preventing damage during battery jump-start or incorrect cable connection.

Use Value: 40 V V_RRM provides 3× margin over nominal 12 V systems, accommodating load-dump transients up to ISO 7637-2 Pulse 5a.

Engine Control Module Power Rails

ADAS Camera Power Supplies

Use Scenario: Input rectification and hold-up in 5 V auxiliary supplies for engine control units operating near exhaust manifolds.

IC Role / Device Role / Timing Role: Output rectifier in isolated flyback or buck-boost converter powering microcontroller and sensor interfaces.

Use Value: 150 °C T_J max and AEC-Q101 qualification ensure stable operation at ambient temperatures exceeding 105 °C in proximity to hot zones.

Use Scenario: Power conditioning for 3.3 V image sensor rails in surround-view camera modules mounted behind grilles.

IC Role / Device Role / Timing Role: Low-noise freewheeling element minimizing voltage ripple during high-current LED flash pulses.

Use Value: 130 pF C_J limits capacitive coupling into analog sensor paths, preserving signal integrity in high-resolution imaging chains.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS3P4HM3/84A	Identical electrical specs and AEC-Q101 qualification; differs only in tape-and-reel packaging (3000 pcs on 7″ reel vs. 10000 pcs on 13″ reel).	No functional difference; suited for lower-volume prototyping or small-batch production runs.	Select SS3P4HM3/84A when matching existing line-side feeder setups or avoiding large reel inventory commitments.
SB340-TB	40 V V_RRM, 4 A I_F(AV), but not AEC-Q101 qualified; R_θJL = 20 °C/W (vs. 15 °C/W); VF = 0.55 V @ 3 A, 25 °C.	Limited to commercial-grade applications; higher forward drop increases thermal load in confined spaces.	Use SB340-TB only in non-automotive designs where cost is prioritized over thermal performance and qualification rigor.

Compared with SS3P4HM3/85A, SS3P4HM3/84A offers identical performance in a smaller reel format ideal for NPI, while SB340-TB trades automotive qualification and thermal efficiency for lower unit cost-making SS3P4HM3/85A the sole choice for production-grade automotive power stages requiring validated reliability.

Availability

SS3P4HM3/85A is available at Aetrix Electronics and suitable for automotive DC/DC converters, polarity protection circuits, and engine control module power rails requiring stable component supply across extended production lifecycles.

Supply support for SS3P4HM3/85A 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 components.

The eSMP® Series-including SS3P4HM3/85A-is engineered specifically for space-constrained automotive and industrial power conversion, balancing ultra-low profile, thermal performance, and AEC-Q101 compliance.

FAQ

What is the maximum junction temperature rating for SS3P4HM3/85A?

The SS3P4HM3/85A has a maximum junction temperature (T_J) of 150 °C, verified per Vishay's qualification testing and documented in the official datasheet. This rating allows the SS3P4HM3/85A to operate reliably in under-hood automotive environments where ambient temperatures exceed 105 °C. Derating curves confirm full 4 A current capability up to 75 °C board temperature, making the SS3P4HM3/85A suitable for thermally demanding ECU power stages.

Is SS3P4HM3/85A pin-compatible with SS3P3HM3/85A?

Yes, SS3P4HM3/85A is pin-compatible with SS3P3HM3/85A because both use the SMP (DO-220AA) package with identical anode/cathode terminal layout and mechanical dimensions. However, SS3P4HM3/85A is rated for 40 V V_RRM and 4 A I_F(AV), whereas SS3P3HM3/85A is rated for 30 V and 3 A. The SS3P4HM3/85A can serve as a higher-performance upgrade where increased voltage margin or current headroom is needed.

Does SS3P4HM3/85A meet AEC-Q101 requirements?

Yes, SS3P4HM3/85A is explicitly AEC-Q101 qualified, as confirmed in Vishay's datasheet revision 08-Mar-2022 (Document Number: 88944). The HM3 suffix denotes automotive-grade construction, including JESD 201 class 2 whisker resistance and MSL level 1 moisture sensitivity. This qualification covers temperature cycling, high-temperature reverse bias, and accelerated life testing-making SS3P4HM3/85A appropriate for safety-critical automotive power applications.

What is the forward voltage drop of SS3P4HM3/85A at elevated temperature?

The SS3P4HM3/85A exhibits a typical forward voltage (V_F) of 0.43 V at 3 A and 125 °C, per the Electrical Characteristics table in the Vishay datasheet. This value is lower than its 25 °C V_F (0.52 V), reflecting the negative temperature coefficient of Schottky diodes. Designers can rely on this 0.43 V figure for worst-case thermal simulations in automotive modules operating continuously at high ambient temperatures.

What packaging format does SS3P4HM3/85A ship in?

SS3P4HM3/85A ships in 13″ diameter plastic tape-and-reel packaging, with a base quantity of 10,000 pieces per reel (package code 85A). This format is optimized for high-volume SMT assembly lines and supports seamless integration with pick-and-place equipment. The tape conforms to EIA-481 standards, and the reels are labeled with full traceability data including lot number and date code for automotive PPAP compliance.

SS3P4HM3/85A Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: eSMP®

Package/Case:: DO-220AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

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

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 600 mV @ 3 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 150 µA @ 40 V

Capacitance @ Vr, F:: -

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DO-220AA (SMP)

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

SS3P4HM3/85A FAQ

1.How can I place an order for SS3P4HM3/85A through Aetrix?

Please submit a Request for Quotation (RFQ) for SS3P4HM3/85A 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 SS3P4HM3/85A reliable?

The price and inventory of SS3P4HM3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS3P4HM3/85A is usually 5 days.

3.What payment methods are accepted for SS3P4HM3/85A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS3P4HM3/85A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SS3P4HM3/85A?

SS3P4HM3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SS3P4HM3/85A 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 SS3P4HM3/85A?

For technical support, including SS3P4HM3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS3P4HM3/85A requirements.

6.How does Aetrix verify that SS3P4HM3/85A is sourced from the original manufacturer or authorized distributors?

All SS3P4HM3/85A 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 SS3P4HM3/85A meets industry standards.

7.What is the process for return or replacement of SS3P4HM3/85A?

All SS3P4HM3/85A units undergo pre-shipment inspection (PSI). If there is an issue with SS3P4HM3/85A, 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 SS3P4HM3/85A part is unused and in its original packaging.

Return procedure for SS3P4HM3/85A:

1.Submit a request within 90 days.

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

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