My Inquiry
My Account
STMicroelectronics STPS8L30H
- Part No.:
- STPS8L30H
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Datasheet:
-
STPS8L30H.pdf
- Description:
- DIODE SCHOTTKY 30V 8A I-PAK
- Quantity:
- Payment:
- Shipping:
Inventory:5,109
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STPS8L30H from STMicroelectronics is a single low-drop Schottky rectifier in DPAK package, rated for 8 A average forward current and 30 V repetitive peak reverse voltage, with typical forward voltage of 0.35 V at 125 °C and 8 A. It serves as secondary-side rectifier in 3.3 V switched-mode power supplies and high-frequency DC/DC converters, enabling reduced conduction loss and minimal heatsink requirement.
For engineers reviewing the STPS8L30H datasheet, STPS8L30H pinout, STPS8L30H application, or STPS8L30H equivalent, key selection criteria include its 2.5 °C/W junction-to-case thermal resistance, avalanche-rated 215 W peak power (10 µs), 150 °C max junction temperature, and ECOPACK®2-compliant DPAK packaging for industrial-grade reliability.
Technical Context
This Schottky diode operates without minority-carrier storage, delivering fast switching and zero reverse recovery charge-critical for high-frequency (>100 kHz) SMPS topologies. Its conduction loss is modeled by P = 0.23 × IF(AV) + 0.021 × IF²(RMS), and it sustains 75 A non-repetitive surge current (10 ms sinusoidal) under defined thermal conditions.
The device features specified avalanche capability up to 215 W (10 µs pulse, Tj = 125 °C), validated under controlled test conditions, and exhibits reverse leakage ≤40 mA at 100 °C and VR = VRRM-enabling stable operation in thermally demanding secondary-side rectification roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 8 A - maximum continuous DC output current at TC = 135 °C, defining usable load capacity in SMPS secondary winding |
| VRRM | 30 V - peak reverse blocking voltage, suitable for 3.3 V output rails with margin against transient overshoot |
| VF (typ.) | 0.35 V @ 125 °C, 8 A - low forward drop directly reduces I²R losses and improves system efficiency above 90% |
| Rth(j-c) | 2.5 °C/W - enables direct thermal coupling to heatsink or PCB copper area, supporting compact thermal design |
| Tj (max.) | 150 °C - maximum junction temperature rating, allowing operation in enclosed or high-ambient environments |
| IFSM | 75 A @ 10 ms - surge withstand capability for inrush and fault transients in DC/DC converter outputs |
| PARM | 215 W @ 10 µs - avalanche energy rating ensures robustness during inductive turn-off events in freewheeling paths |
Pinout & Package
DPAK (TO-252) package with exposed cathode tab for thermal and electrical connection; three-terminal configuration: Anode (pin 1), Cathode (tab/pin 2), and NC (pin 3, not connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Input current entry point | Connected to transformer secondary or switching node; carries full forward current into device |
| Cathode (Tab/Pin 2) | Output current exit & thermal path | Electrically and thermally tied to PCB copper pour; primary heat dissipation surface |
| NC (Pin 3) | No internal connection | Mechanical support only; must remain unconnected to avoid unintended parasitic paths |
Key Features
| Feature | Design Value |
|---|---|
| Low VF at high temperature | 0.35 V typ. @ 125 °C, 8 A - maintains efficiency in thermally stressed 3.3 V output stages |
| Avalanche-rated power | 215 W peak (10 µs) - protects against inductive energy dump in freewheeling and flyback configurations |
| Optimized loss trade-off | Conduction/reverse leakage balance validated per JEDEC JESD24-11 - maximizes power conversion yield |
| ECOPACK®2 compliance | Halogen-free, RoHS-compliant epoxy - meets industrial environmental requirements without derating |
| High surge current rating | 75 A IFSM (10 ms sine) - supports reliable startup and short-circuit tolerance in DC/DC modules |
Applications
| Server VRM Output Rectification | Industrial DC/DC Converter Secondary |
|---|---|
Use Scenario: 3.3 V, 10–20 A output stage in server voltage regulator modules with >200 kHz switching frequency. IC Role / Device Role / Timing Role: Synchronous rectifier replacement; conducts during low-side switch on-time, blocking during high-side conduction. Use Value: 0.35 V VF at 125 °C reduces conduction loss by ~30% vs. standard Schottky alternatives, lowering MOSFET die temperature. | Use Scenario: Isolated 5 V to 3.3 V DC/DC module in programmable logic controllers with ambient up to 70 °C. IC Role / Device Role / Timing Role: Uncontrolled rectifier in forward converter secondary; provides unidirectional current flow with minimal voltage drop. Use Value: 2.5 °C/W Rth(j-c) allows direct mounting to 10 cm² copper area, eliminating discrete heatsink and saving board space. |
| Automotive Infotainment Power Supply | Polarity Protection Circuit |
Use Scenario: 3.3 V rail generation from 12 V battery via buck-derived isolated DC/DC in head unit power tree. IC Role / Device Role / Timing Role: Secondary-side rectifier handling transient load steps up to 5 A/µs with no reverse recovery delay. Use Value: Zero Qrr eliminates switching node ringing and EMI spikes, easing CISPR-25 Class 5 compliance. | Use Scenario: Reverse-voltage protection at input of 3.3 V microcontroller subsystem powered from USB or external adapter. IC Role / Device Role / Timing Role: Cathode-connected to supply rail, anode to load - blocks reverse current during hot-swap or backup battery insertion. Use Value: 30 V VRRM provides 2× margin over 12 V nominal inputs, while 40 mA IR max @ 100 °C ensures low standby leakage. |
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 MBR830CT | TO-220AB dual-diode package; VF = 0.52 V @ 8 A, 25 °C; no avalanche rating | Requires heatsink mounting; unsuitable for surface-mount-only designs or avalanche-prone freewheeling | Select when through-hole assembly and higher VF tolerance are acceptable |
| Vishay VS-8TQ030PBF | TO-220AC single-diode; VF = 0.47 V @ 8 A, 25 °C; Rth(j-c) = 3.0 °C/W; avalanche rated | Larger footprint and higher thermal resistance limit power density in compact DC/DC modules | Prefer where legacy TO-220 footprint compatibility outweighs DPAK space savings |
Compared with MBR830CT and VS-8TQ030PBF, STPS8L30H delivers superior thermal performance (2.5 vs. ≥3.0 °C/W), lower VF at elevated temperature, and DPAK's automated assembly advantage-making it optimal for high-density, surface-mount 3.3 V SMPS designs requiring reliability under thermal stress.
Availability
STPS8L30H is available at Aetrix Electronics and suitable for server VRMs, industrial DC/DC converters, and automotive infotainment power supplies requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for STPS8L30H 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, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
The STPS series targets high-efficiency, high-reliability power conversion-specifically engineered for secondary-side rectification in compact, thermally constrained SMPS and DC/DC applications.
FAQ
Is STPS8L30H suitable for synchronous rectification?
No. STPS8L30H is an uncontrolled Schottky rectifier with fixed anode–cathode polarity. It lacks gate control, body diode optimization, or integrated driver circuitry required for synchronous rectification. It functions only as a passive, self-commutated rectifier in flyback, forward, or half-wave topologies.
What is the minimum recommended copper area for thermal relief on FR4 PCB?
Per Figure 8 in the datasheet, a minimum of 10 cm² of 35 µm-thick copper under the cathode tab achieves Rth(j-a) ≈ 70 °C/W. For operation near 8 A continuous current at 70 °C ambient, ≥25 cm² is recommended to maintain Tj ≤ 125 °C without additional heatsinking.
Does STPS8L30H have a specified reverse recovery time (trr)?
No. As a Schottky barrier diode, STPS8L30H has no minority-carrier storage and therefore no measurable reverse recovery time. Its switching behavior is governed solely by junction capacitance (Cj ≈ 200 pF @ 0 V, Figure 6) and is effectively instantaneous-eliminating trr-related losses and EMI in high-frequency operation.
Can STPS8L30H replace STPS8L30 in existing designs?
Yes. STPS8L30H is a qualified variant of STPS8L30 with identical electrical specifications, DPAK mechanical outline, and thermal performance. The "H" suffix denotes enhanced process control and tighter VF distribution (±5% vs. ±10%), offering improved consistency in high-volume production without layout or thermal redesign.
STPS8L30H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- Through Hole
- Supplier Device Package:
- IPAK
- Operating Temperature - Junction:
- 150°C (Max)
STPS8L30H FAQ
1.How can I place an order for STPS8L30H through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS8L30H 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 STPS8L30H reliable?
The price and inventory of STPS8L30H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS8L30H is usually 5 days.
3.What payment methods are accepted for STPS8L30H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS8L30H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS8L30H?
STPS8L30H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS8L30H 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 STPS8L30H?
For technical support, including STPS8L30H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS8L30H requirements.
6.How does Aetrix verify that STPS8L30H is sourced from the original manufacturer or authorized distributors?
All STPS8L30H 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 STPS8L30H meets industry standards.
7.What is the process for return or replacement of STPS8L30H?
All STPS8L30H units undergo pre-shipment inspection (PSI). If there is an issue with STPS8L30H, 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 STPS8L30H part is unused and in its original packaging.
Return procedure for STPS8L30H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS8L30H Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
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, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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.
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.
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…
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…
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…
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
