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STMicroelectronics STPS1150RL
- Part No.:
- STPS1150RL
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
STPS1150RL.pdf
- Description:
- DIODE SCHOTTKY 150V 1A DO41
- Quantity:
- Payment:
- Shipping:
Inventory:855
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Product details
Overview
STPS1150RL from STMicroelectronics is a 150 V, 1 A surface-mount Schottky power rectifier in DO-41 axial package, optimized for high-frequency switch-mode power supplies (SMPS) and DC/DC converters operating on ≤24 V rails. It delivers low forward voltage drop (0.62 V typ. at 1 A, 125 °C), negligible switching losses, and avalanche capability up to 108 W (10 µs pulse). Its thermal resistance is 30 °C/W (junction-to-lead), supporting reliable operation up to 175 °C junction temperature.
For engineers reviewing the STPS1150RL datasheet, STPS1150RL pinout, STPS1150RL application, or STPS1150RL equivalent, key selection criteria include forward voltage at 1 A and 125 °C, repetitive peak reverse voltage (150 V), surge current rating (75 A), thermal resistance (30 °C/W), and ECOPACK2 compliance for RoHS-constrained designs.
Technical Context
This Schottky rectifier uses a planar silicon structure with metal–semiconductor junction to eliminate minority-carrier storage delay, enabling zero reverse recovery time and minimal switching loss in high-frequency (>100 kHz) topologies. Its low VF reduces conduction loss in low-voltage output stages of telecom and computing SMPS.
The device is rated for 175 °C maximum junction temperature and features avalanche energy capability (108 W at 10 µs, Tj = 125 °C), allowing robust handling of inductive turn-off transients without external snubbers in flyback or boost converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - Withstands repetitive reverse voltage up to 150 V, suitable for 24 V input SMPS with ≥2× safety margin. |
| IF(AV) | 1 A - Average forward current rating at TL = 150 °C (DO-41), defines continuous DC output capability in rectifier stage. |
| VF(typ.) | 0.62 V @ 1 A, 125 °C - Low conduction loss enables >92% efficiency in 5–12 V output DC/DC converters. |
| Rth(j-l) | 30 °C/W - Junction-to-lead thermal resistance determines heatsink-free operation limit under natural convection. |
| IFSM | 75 A @ tp = 10 ms (sinusoidal) - Supports inrush current tolerance during cold-start in telecom power modules. |
| IR(max) | 1.0 mA @ VR = VRRM, Tj = 125 °C - Low leakage preserves standby power budget in always-on systems. |
| ECOPACK2 | Compliant - Meets EU RoHS Directive 2011/65/EU and halogen-free requirements for industrial/commercial end equipment. |
Pinout & Package
STPS1150RL is housed in a DO-41 axial leaded package with cathode band marking. Leads are tinned copper alloy, compatible with wave and reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Input terminal for forward conduction path | Connected to transformer secondary or switching node; must withstand full input voltage during reverse bias. |
| Cathode (banded end) | Output terminal for forward conduction path | Connected to output filter capacitor; polarity-sensitive-reversal causes catastrophic short in SMPS. |
Key Features
| Feature | Design Value |
|---|---|
| Negligible switching losses | Zero reverse recovery time (Qrr ≈ 0) eliminates turn-off loss and EMI in >200 kHz converters. |
| Low forward voltage drop | 0.62 V typ. at 1 A, 125 °C reduces conduction loss by ~35% vs. standard PN diodes in 12 V output rails. |
| Avalanche capability | 108 W peak avalanche power (10 µs, Tj = 125 °C) allows safe operation under inductive load switching without snubber. |
| Low thermal resistance | 30 °C/W junction-to-lead enables 1 A continuous current with <50 °C rise above ambient on PCB with 10 mm leads. |
Applications
| Telecom AC-DC Adapters | Server DC/DC Point-of-Load |
|---|---|
Use Scenario: 48 V to 12 V isolated DC/DC conversion in telecom wall adapters with strict no-load power limits. IC Role / Device Role / Timing Role: Output rectifier in synchronous flyback topology, conducting during MOSFET off-time. Use Value: 0.62 V VF minimizes conduction loss at light loads, extending battery backup runtime and meeting Energy Star Tier 2 standby specs. |
Use Scenario: Secondary-side rectification in 48 V input, 3.3 V/10 A VRM for CPU core supply in rack servers. IC Role / Device Role / Timing Role: Freewheeling diode in non-synchronous buck converter where gate drive complexity prohibits synchronous rectification. Use Value: Avalanche rating absorbs inductive kickback from high-di/dt currents, eliminating need for TVS clamping and reducing BOM count. |
| Industrial PLC Power Modules | Consumer Laptop AC Adapters |
Use Scenario: 24 V rail generation from 120/230 VAC input in programmable logic controller (PLC) power supplies. IC Role / Device Role / Timing Role: Input bridge rectifier replacement in high-frequency PFC + LLC combo stages. Use Value: 175 °C max junction temperature ensures reliability in sealed enclosures with ambient up to 70 °C and no forced airflow. |
Use Scenario: Output rectification in compact 19 V, 3.42 A laptop adapter using quasi-resonant flyback. IC Role / Device Role / Timing Role: Main output diode delivering regulated 19 V to battery charging circuitry. Use Value: ECOPACK2 compliance meets global environmental regulations for consumer electronics, including China RoHS and Japan J-Moss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS115-E3/5AT (Vishay) | Same VRRM (150 V), IF(AV) = 1 A, VF = 0.82 V @ 1 A, 25 °C; DO-41 package; no avalanche rating specified. | Lacks documented avalanche capability; requires external clamping in inductive circuits. | Prefer when cost sensitivity outweighs transient robustness and thermal margin is ample. |
| SB1150 (ON Semiconductor) | Same VRRM (150 V), IF(AV) = 1 A, VF = 0.85 V @ 1 A, 25 °C; DO-41; Rth(j-l) = 35 °C/W; no avalanche spec. | Higher VF increases conduction loss by ~37 mW at 1 A, reducing efficiency in thermally constrained designs. | Select only if legacy qualification or second-source validation mandates ON Semi footprint compatibility. |
Compared with SS115-E3/5AT and SB1150, STPS1150RL provides lower VF at elevated temperature (0.62 V vs. ≥0.75 V), verified avalanche energy (108 W), and tighter thermal resistance (30 °C/W), making it optimal for high-reliability, high-efficiency 24 V-input SMPS where thermal headroom and transient immunity are critical.
Availability
STPS1150RL is available at Aetrix Electronics and suitable for telecom AC-DC adapters, server point-of-load converters, and industrial PLC power modules requiring stable component supply across multi-year production cycles.
Supply support for STPS1150RL 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, sensors, and analog ICs for automotive, industrial, and consumer markets.
STPS1150RL belongs to ST's high-voltage Schottky rectifier product line, engineered specifically for high-frequency, high-efficiency power conversion in space-constrained and thermally demanding applications such as telecom and computing power supplies.
FAQ
What is the maximum allowable junction temperature for STPS1150RL?
The absolute maximum junction temperature is +175 °C, as specified in Table 1 of DS3281 Rev 8. Operation beyond this limit risks permanent degradation of the Schottky barrier and increased leakage. Derating curves in Figure 2 confirm 1 A average current is sustainable up to 150 °C ambient when mounted with 10 mm lead length on FR4 PCB.
Does STPS1150RL have a specified reverse recovery time (trr)?
No-STPS1150RL is a Schottky diode and exhibits no minority-carrier storage; its reverse recovery time is effectively zero. This eliminates switching loss and associated EMI in high-frequency converters. The datasheet confirms negligible switching losses in the Features section and omits trr from all electrical characteristics tables.
Can STPS1150RL replace a standard PN rectifier like 1N4007 in a 24 V power supply?
Yes, but only in forward-biased rectification roles-not as a general-purpose replacement. STPS1150RL offers lower VF and zero trr, improving efficiency and reducing heat, but its 150 V VRRM is lower than 1N4007's 1000 V. It is valid only where reverse voltage remains ≤150 V, such as secondary-side rectification in isolated 24 V SMPS.
Is STPS1150RL lead-free and RoHS compliant?
Yes-STPS1150RL is ECOPACK2 compliant, satisfying EU RoHS Directive 2011/65/EU and containing ≤1000 ppm bromine and ≤1000 ppm chlorine. The "RL" suffix denotes tape-and-reel packaging with lead-free terminations, verified per ST's material declarations and JEDEC J-STD-020 moisture sensitivity level 1 rating.
STPS1150RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 150 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 820 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 150 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
- Operating Temperature - Junction:
- 175°C (Max)
STPS1150RL FAQ
1.How can I place an order for STPS1150RL through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS1150RL 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 STPS1150RL reliable?
The price and inventory of STPS1150RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS1150RL is usually 5 days.
3.What payment methods are accepted for STPS1150RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS1150RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS1150RL?
STPS1150RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS1150RL 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 STPS1150RL?
For technical support, including STPS1150RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS1150RL requirements.
6.How does Aetrix verify that STPS1150RL is sourced from the original manufacturer or authorized distributors?
All STPS1150RL 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 STPS1150RL meets industry standards.
7.What is the process for return or replacement of STPS1150RL?
All STPS1150RL units undergo pre-shipment inspection (PSI). If there is an issue with STPS1150RL, 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 STPS1150RL part is unused and in its original packaging.
Return procedure for STPS1150RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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