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

STMicroelectronics STPS8L30BY-TR

Name: STPS8L30BY-TR
Brand: STMicroelectronics
SKU: STPS8L30BY-TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS8L30BY-TR

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: STPS8L30BY-TR.pdf

Description:: DIODE SCHOTTKY 30V 8A DPAK

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Inventory:1,425

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Product details

Overview

STPS8L30BY-TR from STMicroelectronics is an automotive-grade Schottky rectifier in DPAK package, rated for 8 A average forward current and 30 V repetitive peak reverse voltage, with maximum forward voltage drop of 0.40 V at 125 °C and 8 A - enabling high-efficiency rectification in SMPS and DC/DC converters for engine control units and body electronics.

For engineers reviewing the STPS8L30BY-TR datasheet, STPS8L30BY-TR pinout, STPS8L30BY-TR application, or STPS8L30BY-TR equivalent, key selection criteria include its AEC-Q101 qualification, low thermal resistance (R_th(j-c) = 2.5 °C/W), junction temperature range (−40 to +150 °C), and suitability for polarity protection and high-frequency rectification in constrained automotive power rails.

Technical Context

This device operates as a single-junction silicon Schottky barrier diode optimized for conduction-loss minimization in switching power supplies. Its VF vs. IF curve shows strong temperature stability - typ. 0.35 V at 125 °C / 8 A - and it sustains surge currents up to 75 A (10 ms sine) without degradation.

Designed for surface-mount use on FR4 PCBs with copper heatsinking, it leverages DPAK's exposed cathode tab for direct thermal coupling. The 10,000 V/µs dV/dt rating ensures robustness against fast transient reversal in inductive automotive loads.

Key Specifications

Parameter	Value and Actual Design Meaning
IF(AV)	8 A - supports continuous output rectification in 12 V/24 V automotive DC/DC modules up to ~100 W
VRRM	30 V - withstands load-dump transients and battery voltage spikes in 12 V systems
VF (max)	0.40 V @ 125 °C / 8 A - reduces conduction loss to ≤3.2 W, minimizing heatsink requirements
Rth(j-c)	2.5 °C/W - enables direct mounting to PCB copper pour for efficient thermal dissipation
Tj max	+150 °C - meets under-hood ambient requirements with derating margin for sustained operation
AEC-Q101	Qualified - certified for automotive electronic modules per stress test standard
IRRM	1 A @ 2 µs / 1 kHz square - low leakage preserves efficiency during high-frequency PWM dead time

Pinout & Package

Package: DPAK (TO-252), surface-mount with exposed cathode tab for thermal and electrical connection. Dimensions per Figure 10: L × W × H = 6.6 mm × 6.2 mm × 2.4 mm (typ.), weight 0.3 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Input terminal for forward current flow	Connected to switching node (e.g., MOSFET drain) in buck/flyback secondary side
Cathode (Tab)	Output terminal and thermal path	Must be soldered to ≥100 mm² copper area for R_th(j-a) ≤ 70 °C/W; electrically common with Pin 2
Pin 2	Electrical cathode connection	Provides secondary cathode routing when tab cannot be directly connected to ground plane

Key Features

Feature	Design Value
Low forward voltage drop	0.40 V max @ 125 °C / 8 A - cuts conduction loss by >30% vs. standard PN diodes in same package
Optimized loss trade-off	Conduction/reverse leakage balance yields highest system efficiency in 100–500 kHz SMPS
AEC-Q101 qualification	Validated for automotive temperature cycling, humidity, and mechanical shock per JESD22
Lead-free DPAK	RoHS-compliant, UL94 V0 epoxy, compatible with standard reflow profiles (peak 260 °C)

Applications

Engine Control Unit (ECU) Power Supply

Infotainment System DC/DC Converter

Use Scenario: Rectifying switched output in 12 V → 5 V/3.3 V buck converter supplying MCU and CAN transceivers.

IC Role / Device Role / Timing Role: Output rectifier handling 6–8 A average current at 250 kHz switching frequency.

Use Value: 0.40 V VF at 125 °C limits power loss to <3.2 W, eliminating need for discrete heatsink in sealed ECU housing.

Use Scenario: Polarity protection and reverse-current blocking at input of 12 V → 8 V DC/DC stage powering display backlight drivers.

IC Role / Device Role / Timing Role: Unidirectional current gate preventing damage from battery reverse connection or jump-start events.

Use Value: 30 V VRRM and 75 A IFSM withstand 12 V system transients including ISO 7637-2 pulse 5a (load dump).

Body Control Module (BCM) Auxiliary Rail

ADAS Camera Power Sequencing

Use Scenario: Secondary-side rectification in isolated flyback supplying 5 V for door module microcontrollers and LIN transceivers.

IC Role / Device Role / Timing Role: High-frequency rectifier operating at 300 kHz with δ = 0.5 duty cycle.

Use Value: Low IRSM (2 A) and fast recovery enable clean turn-off during light-load burst-mode operation.

Use Scenario: Input-stage reverse-polarity clamp protecting 12 V → 3.3 V LDO-fed image sensor and ISP.

IC Role / Device Role / Timing Role: Fail-safe protection diode placed before primary regulator to block reverse current during hot-swap or cable disconnect.

Use Value: AEC-Q101 qualification ensures reliability across −40 to +105 °C ambient, matching camera module thermal profile.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STPS8L30CT-TR	Dual common-cathode configuration; same VF/VRRM/IF but split 2×4 A channels	Requires dual-output or interleaved topology; not drop-in for single-channel layout	Select only if redesigning for channel redundancy or current sharing
MBR830CT-E3/45	TO-220AC package; higher R_th(j-c) = 3.0 °C/W; VF = 0.52 V @ 125 °C / 8 A	Needs mechanical mounting and heatsink; unsuitable for space-constrained SMT designs	Choose only where through-hole assembly or legacy footprint compatibility is mandatory

Compared with STPS8L30CT-TR and MBR830CT-E3/45, the STPS8L30BY-TR uniquely combines DPAK SMT compatibility, lowest VF at high temperature, and AEC-Q101 certification - making it optimal for new automotive SMT power designs requiring minimal board area and thermal overhead.

Availability

STPS8L30BY-TR is available at Aetrix Electronics and suitable for engine control units, infotainment power supplies, and ADAS camera modules requiring stable component supply across extended temperature and automotive lifecycle demands.

Supply support for STPS8L30BY-TR 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The STPS series targets automotive power conversion with Schottky rectifiers optimized for low VF, high Tj, and AEC-Q101 compliance - specifically engineered for SMPS and DC/DC rectification in harsh-temperature vehicle subsystems.

FAQ

What is the maximum allowable case temperature for continuous operation?

The device specifies T_c = 135 °C at I_F(AV) = 8 A (δ = 0.5). With R_th(j-c) = 2.5 °C/W, junction temperature reaches 150 °C at this condition - matching the absolute maximum T_j. Therefore, case temperature must be held ≤135 °C via adequate PCB copper area and airflow to maintain rated current.

Can STPS8L30BY-TR replace a standard PN rectifier in an existing 12 V automotive design?

Yes - provided layout accommodates DPAK footprint and thermal pad. Its 30 V VRRM matches typical 12 V system requirements, and 0.40 V VF at 125 °C delivers ~40% lower conduction loss than a comparable PN diode, reducing thermal stress without changing drive circuitry or control loop compensation.

Is the cathode tab electrically isolated from Pin 2?

No - the cathode tab and Pin 2 are internally shorted and form a single electrical node. Both must connect to the same net (typically ground or output return). The tab serves as the primary thermal path and secondary electrical connection; Pin 2 provides routing flexibility when tab soldering is mechanically constrained.

Does ST provide SPICE models or thermal simulation files for this part?

ST does not publish SPICE models for STPS8L30BY-TR. However, thermal performance data (R_th(j-c), Z_th(j-c) vs. pulse duration) and VF/IR curves across temperature are fully documented in Figures 7–5 of the datasheet (DocID024083 Rev 1), enabling accurate loss and temperature modeling in tools like Mentor Thermica or Ansys Icepak.

STPS8L30BY-TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 30 V

Current - Average Rectified (Io):: 8A

Voltage - Forward (Vf) (Max) @ If:: 490 mV @ 8 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 mA @ 30 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

Operating Temperature - Junction:: -40°C ~ 150°C

STPS8L30BY-TR FAQ

1.How can I place an order for STPS8L30BY-TR through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS8L30BY-TR 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 STPS8L30BY-TR reliable?

The price and inventory of STPS8L30BY-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS8L30BY-TR is usually 5 days.

3.What payment methods are accepted for STPS8L30BY-TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS8L30BY-TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS8L30BY-TR?

STPS8L30BY-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS8L30BY-TR 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 STPS8L30BY-TR?

For technical support, including STPS8L30BY-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS8L30BY-TR requirements.

6.How does Aetrix verify that STPS8L30BY-TR is sourced from the original manufacturer or authorized distributors?

All STPS8L30BY-TR 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 STPS8L30BY-TR meets industry standards.

7.What is the process for return or replacement of STPS8L30BY-TR?

All STPS8L30BY-TR units undergo pre-shipment inspection (PSI). If there is an issue with STPS8L30BY-TR, 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 STPS8L30BY-TR part is unused and in its original packaging.

Return procedure for STPS8L30BY-TR:

1.Submit a request within 90 days.

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

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