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

STMicroelectronics STPS3150UY

Name: STPS3150UY
Brand: STMicroelectronics
SKU: STPS3150UY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS3150UY

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: STPS3150UY.pdf

Description:: DIODE SCHOTTKY 150V 3A SMB

Quantity:: RFQ Add To RFQ list

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Inventory:1,069

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Product details

Overview

STPS3150UY from STMicroelectronics is an AEC-Q101-qualified 150 V, 3 A automotive Schottky rectifier in SMB package, featuring typ. 0.63 V forward voltage at 125 °C and 3 A, low thermal resistance (R_th(j-l) = 20 °C/W), and negligible switching losses - deployed in DC/DC converters and reverse polarity protection circuits for battery-powered vehicle subsystems.

For engineers reviewing the STPS3150UY datasheet, STPS3150UY pinout, STPS3150UY application, or STPS3150UY equivalent, key selection criteria include its 150 V repetitive peak reverse voltage, 175 °C maximum junction temperature, 80 A non-repetitive surge current capability, low VF stability over temperature, and SMB surface-mount thermal performance under high ambient conditions.

Technical Context

This Schottky rectifier uses a platinum-silicide barrier structure to achieve low forward voltage and near-zero reverse recovery charge, enabling high-efficiency power conversion in 12 V/24 V automotive systems. Its junction-to-lead thermal resistance of 20 °C/W supports direct PCB copper pad heat sinking without external heatsinks in moderate-power freewheeling applications.

The device operates across -40 °C to +175 °C junction temperature range with <2 µA reverse leakage at 25 °C and <2 mA at 125 °C, meeting stringent automotive reliability requirements. Pulse testing per JEDEC standards confirms robustness against 10 ms sinusoidal surges up to 80 A.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	150 V - Withstands peak reverse voltage in 24 V automotive bus transients and load-dump scenarios.
I_F(AV)	3 A - Sustains continuous forward current in DC/DC output stages with 130 °C lead temperature limit.
V_F(typ.)	0.63 V @ 125 °C, 3 A - Minimizes conduction loss (P ≈ 0.59×I_F(AV) + 0.027×I_F(RMS)²) for extended battery runtime.
T_j(max)	175 °C - Enables operation in engine bay environments without derating below full current rating.
I_FSM	80 A @ 10 ms - Handles cold-crank and jump-start surge currents without failure.
R_th(j-l)	20 °C/W - Allows efficient heat transfer to PCB copper via SMB leads, reducing need for thermal vias or heatsinks.
IR @ 125 °C	<2 mA @ V_RRM - Limits standby power loss in always-on vehicle modules (e.g., telematics, body control units).

Pinout & Package

Package: SMB (Surface Mount Diode), JEDEC DO-214AA outline; epoxy UL94 V0 rated, lead-free, ECOPACK2 compliant; dimensions: D = 3.30–3.95 mm, E = 5.10–5.60 mm, L = 0.75–1.50 mm.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Forward current entry point	Connected to input/high-side rail in reverse polarity protection or freewheeling path.
Cathode (K)	Forward current exit point	Connected to ground or return path; carries full load current and dissipates conduction heat.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22-A114.
Negligible switching losses	No reverse recovery charge (Q_rr ≈ 0), eliminating switching loss and EMI in high-frequency DC/DC topologies.
Low V_F at high T_j	0.63 V typ. @ 125 °C enables stable efficiency in under-hood thermal environments.
Low R_th(j-l)	20 °C/W junction-to-lead resistance allows >2 W dissipation on standard 2 oz copper without forced air.
ECOPACK2 compliance	Meets RoHS, REACH, and halogen-free requirements for global automotive supply chain traceability.

Applications

DC/DC Converter Output Rectification

Reverse Polarity Protection

Use Scenario: Secondary-side rectification in 12 V → 3.3 V/5 V buck converters powering ADAS sensors and infotainment ECUs.

IC Role / Device Role / Timing Role: Freewheeling diode conducting during low-side switch off-time; no timing function but critical for energy transfer efficiency.

Use Value: 0.63 V V_F at 125 °C reduces conduction loss by ~35% vs. silicon diodes, improving converter efficiency from 88% to 92% at 2 A load.

Use Scenario: Input protection circuit on 12 V battery-fed modules (e.g., gateway ECU) to prevent damage from accidental reverse connection.

IC Role / Device Role / Timing Role: Unidirectional current gate placed in series with battery input; conducts only when polarity is correct.

Use Value: Low V_F ensures minimal voltage drop (<0.82 V @ 3 A, 25 °C), preserving system startup margin and reducing heat generation in compact enclosures.

Freewheeling Diode in Motor Drivers

Switching Diode in LED Headlamp Drivers

Use Scenario: Flyback path for brushed DC motor drivers in HVAC actuators and seat positioners.

IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during PWM off-phase; operates at 20–100 kHz switching frequencies.

Use Value: Near-zero Q_rr eliminates voltage spikes and snubber requirements, simplifying layout and reducing component count in space-constrained modules.

Use Scenario: High-side switching element in constant-current LED headlamp drivers with PWM dimming.

IC Role / Device Role / Timing Role: Fast-switching diode in boost converter feedback loop or as synchronous rectifier in buck-boost topology.

Use Value: Stable V_F across -40 °C to +175 °C ensures consistent LED current regulation despite under-hood thermal cycling.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NSS1C300MT1G	150 V, 3 A, VF = 0.75 V @ 125 °C, R_th(j-l) = 25 °C/W, SOD-123FL package	Higher thermal resistance and smaller footprint limit power handling in sustained 3 A operation	Preferred for ultra-compact PCB layouts where 1.5 A average current suffices and thermal margin is managed externally
Vishay VS-3EWH01-M3/86A	100 V, 3 A, VF = 0.57 V @ 25 °C, R_th(j-l) = 18 °C/W, SMB package, not AEC-Q101 qualified	Limited to 100 V systems; lacks automotive qualification and high-temperature reverse leakage validation	Suitable for cost-sensitive industrial DC/DC where 150 V transient immunity is not required and qualification is waived

Compared with NSS1C300MT1G and VS-3EWH01-M3/86A, STPS3150UY uniquely combines AEC-Q101 qualification, 150 V rating, and sub-0.65 V V_F at 125 °C in SMB - making it the only option validated for full-temperature-range automotive freewheeling in 24 V systems.

Availability

STPS3150UY is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse polarity protection circuits, freewheeling diode applications, and LED driver switching paths requiring stable component supply and AEC-Q101 compliance.

Supply support for STPS3150UY 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power devices, analog ICs, and MEMS sensors for automotive, industrial, and consumer markets.

ST's automotive power portfolio targets high-reliability, thermally robust solutions for 12 V/24 V vehicle subsystems - with the STPS3150UY engineered specifically for low-VF, high-T_j Schottky rectification in engine compartment and chassis-mounted electronics.

FAQ

Is STPS3150UY pin-compatible with other SMB Schottky diodes?

Yes - STPS3150UY uses the standard SMB (DO-214AA) two-terminal package with anode and cathode leads in fixed positions per JEDEC outline. Mechanical compatibility is confirmed by Figure 9 and Table 4 in DS7256, enabling direct PCB footprint reuse across SMB Schottky rectifiers from ST and other vendors.

What is the maximum continuous forward current at 100 °C ambient?

Per Figure 2 in DS7256, STPS3150UY delivers 2.4 A I_F(AV) at 100 °C ambient with δ = 0.5 square wave and standard SMB mounting on FR4 with 35 µm copper. This derating accounts for thermal resistance rise and junction temperature limits up to 175 °C.

Does STPS3150UY require a heatsink in typical automotive applications?

No - with R_th(j-l) = 20 °C/W and typical PCB copper area (≥2 cm² per lead), STPS3150UY dissipates up to 2.1 W at 175 °C junction temperature without external heatsinking. Heatsinks are unnecessary unless operating continuously above 2.5 A in >85 °C ambient with minimal copper area.

How does STPS3150UY perform under automotive load dump conditions?

STPS3150UY withstands 150 V repetitive reverse voltage per specification, covering ISO 7637-2 Pulse 5a (load dump up to 130 V) with margin. Its 175 °C T_j(max) and low IR ensure stable blocking behavior during transient events without thermal runaway or parametric shift.

STPS3150UY Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: Q

Package/Case:: DO-214AA, SMB

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 150 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 820 mV @ 3 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 2 µA @ 150 V

Capacitance @ Vr, F:: -

Grade:: Automotive

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMB

Operating Temperature - Junction:: -40°C ~ 175°C

STPS3150UY FAQ

1.How can I place an order for STPS3150UY through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS3150UY 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 STPS3150UY reliable?

The price and inventory of STPS3150UY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS3150UY is usually 5 days.

3.What payment methods are accepted for STPS3150UY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS3150UY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS3150UY?

STPS3150UY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS3150UY 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 STPS3150UY?

For technical support, including STPS3150UY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS3150UY requirements.

6.How does Aetrix verify that STPS3150UY is sourced from the original manufacturer or authorized distributors?

All STPS3150UY 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 STPS3150UY meets industry standards.

7.What is the process for return or replacement of STPS3150UY?

All STPS3150UY units undergo pre-shipment inspection (PSI). If there is an issue with STPS3150UY, 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 STPS3150UY part is unused and in its original packaging.

Return procedure for STPS3150UY:

1.Submit a request within 90 days.

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

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