My Inquiry
My Account
STMicroelectronics STPS120M
- Part No.:
- STPS120M
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- DO-216AA
- Datasheet:
-
STPS120M.pdf
- Description:
- DIODE SCHOTTKY 20V 1A STMITE
- Quantity:
- Payment:
- Shipping:
Inventory:20,965
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STPS120M from STMicroelectronics is a single Power Schottky rectifier optimized for low-voltage, high-frequency DC-DC conversion, with 1 A average forward current (IF(AV)), 20 V repetitive peak reverse voltage (VRRM), and typical forward voltage drop of 0.36 V at 100 °C - enabling high-efficiency power stages in portable battery-powered equipment including notebooks, PDAs, and PCMCIA cards.
For engineers reviewing the STPS120M datasheet, STPS120M pinout, STPS120M application, or STPS120M equivalent, key selection criteria include its ultra-low VF for minimal conduction loss, avalanche-rated 100 W pulse capability, 20 °C/W junction-to-case thermal resistance, and STmite package compatibility with space-constrained PCB layouts.
Technical Context
This Schottky rectifier operates without minority-carrier storage, delivering negligible switching losses and extremely fast recovery - critical for >100 kHz switch-mode topologies. Its low thermal resistance (Rth(j-c) = 20 °C/W) and specified avalanche capability (PARM = 100 W, tp = 10 µs at Tj = 125 °C) support robust operation under transient overvoltage and inductive flyback conditions.
The device exhibits temperature-stable forward characteristics: VF remains ≤0.41 V at 100 °C and 1 A, while reverse leakage stays below 850 µA at 100 °C and full VRRM - ensuring predictable performance across industrial ambient ranges (-65 to +150 °C storage).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 1 A - supports continuous output current in compact DC-DC converters without forced cooling |
| VRRM | 20 V - rated for 12 V input rails with margin against transients in battery-fed systems |
| VF (typ) | 0.36 V @ 100 °C, 1 A - reduces conduction loss by ~40% vs. standard silicon diodes, extending battery runtime |
| Rth(j-c) | 20 °C/W - enables direct thermal coupling to PCB copper for passive heatsinking in thin-profile designs |
| PARM | 100 W @ tp = 10 µs - sustains controlled avalanche energy during inductive turn-off spikes in free-wheeling paths |
| IR (max) | 850 µA @ 100 °C, VR = VRRM - ensures low standby leakage in always-on portable subsystems |
Pinout & Package
STPS120M uses the STmite surface-mount package - a compact, low-profile molded case with exposed cathode pad for thermal and electrical connection. Dimensions: 1.90 mm × 1.90 mm × 3.75 mm (L × W × H), with 0.65 mm lead width and 0.05 mm max A1 coplanarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current terminal | Connected to switching node or input rail; accepts up to 50 A non-repetitive surge (IFSM) |
| Cathode (tab) | Output/return terminal & thermal path | Exposed metal pad serves as primary heat sink interface and circuit return; must be soldered to ≥1.1 cm² FR4 copper |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VF | 0.36 V typ @ 100 °C/1 A - directly lowers I²R loss and improves light-load efficiency in buck converters |
| Avalanche-rated | 100 W pulsed power @ 125 °C - eliminates need for external clamping in flyback/freewheeling snubbers |
| Low Rth(j-c) | 20 °C/W - allows >1 W dissipation with <20 °C rise above PCB temperature using standard layout |
| STmite package | 1.9 mm × 1.9 mm footprint - fits within tight spacing constraints of mobile chargers and USB-PD modules |
Applications
| Portable Battery Charger | USB-C Power Delivery Module |
|---|---|
Use Scenario: 5–20 V input DC-DC stage in wall adapters and portable power banks. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback topology. Use Value: 0.36 V VF minimizes dropout and thermal buildup at 1–2 A loads, enabling fanless operation in compact enclosures. | Use Scenario: Secondary-side rectification in 20–45 W USB-C PD adapters. IC Role / Device Role / Timing Role: Freewheeling diode in buck-derived constant-voltage/constant-current control loop. Use Value: Avalanche rating absorbs inductive kickback during MOSFET dead-time, improving reliability without added TVS components. |
| Notebook DC-DC Converter | PCMCIA Card Power Rail |
Use Scenario: Point-of-load (POL) 3.3 V or 5 V generation from 12 V main rail. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in high-frequency (≥500 kHz) buck converter. Use Value: Negligible reverse recovery eliminates shoot-through risk and EMI from minority-carrier tail currents. | Use Scenario: Polarity protection and reverse-current blocking on 3.3 V/5 V card-edge supplies. IC Role / Device Role / Timing Role: Low-loss series blocking diode with minimal voltage headroom penalty. Use Value: 0.44 V VF at 25 °C preserves >97% of supply voltage, critical for low-margin logic rails in legacy PCMCIA slots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Diodes Inc. SB120 | Same IF(AV) = 1 A, VRRM = 20 V, but VF = 0.45 V typ @ 25 °C; Rth(j-c) = 25 °C/W | Larger thermal resistance requires larger copper area; no avalanche rating specified | Prefer when cost sensitivity outweighs thermal or transient robustness requirements |
| Vishay SS12 | IF(AV) = 1 A, VRRM = 20 V, VF = 0.5 V typ @ 25 °C; TO-277 package (larger footprint) | TO-277 offers higher creepage but occupies 3× more board area than STmite | Select when higher isolation or manual rework tolerance is prioritized over miniaturization |
Compared with SB120 and SS12, STPS120M delivers lower conduction loss, superior thermal performance, and verified avalanche capability - making it optimal for space-constrained, high-reliability DC-DC stages where efficiency and transient resilience are co-prioritized.
Availability
STPS120M is available at Aetrix Electronics and suitable for portable battery chargers, USB-C power delivery modules, and notebook DC-DC converters requiring stable component supply and long-term production continuity.
Supply support for STPS120M 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 automotive, industrial, and consumer markets.
The STPS120M belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-frequency, low-voltage power conversion in space- and efficiency-sensitive portable electronics.
FAQ
What is the maximum junction temperature for continuous operation?
The STPS120M has a maximum operating junction temperature (Tj) of 150 °C, validated under conditions that avoid thermal runaway - specifically requiring dPtot/dTj < 1/Rth(j-a) when mounted on minimum recommended FR4 copper area. Derating applies above 100 °C ambient.
Does STPS120M require a heatsink for 1 A continuous current?
No external heatsink is required: with Rth(j-c) = 20 °C/W and typical VF ≈ 0.4 V, power dissipation is ~0.4 W at 1 A - resulting in <10 °C junction-to-PCB rise when soldered to ≥1.1 cm² of 2 oz copper, per Figure 9 in the datasheet.
Can STPS120M replace a standard silicon rectifier in an existing 12 V flyback design?
Yes - its 20 V VRRM and 1 A IF(AV) match common 12 V secondary-side requirements, and its zero reverse recovery eliminates snubber losses. However, verify layout thermal relief and ensure cathode pad is fully soldered to copper for optimal Rth(j-c) performance.
Is STPS120M RoHS and REACH compliant?
Yes - STPS120M is manufactured in ECOPACK®-compliant STmite packaging meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free terminations and halogen-free epoxy (UL94 V0 rated).
STPS120M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- DO-216AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 490 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 3.9 µA @ 20 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- STmite
- Operating Temperature - Junction:
- 150°C (Max)
STPS120M FAQ
1.How can I place an order for STPS120M through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS120M 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 STPS120M reliable?
The price and inventory of STPS120M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS120M is usually 5 days.
3.What payment methods are accepted for STPS120M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS120M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS120M?
STPS120M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS120M 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 STPS120M?
For technical support, including STPS120M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS120M requirements.
6.How does Aetrix verify that STPS120M is sourced from the original manufacturer or authorized distributors?
All STPS120M 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 STPS120M meets industry standards.
7.What is the process for return or replacement of STPS120M?
All STPS120M units undergo pre-shipment inspection (PSI). If there is an issue with STPS120M, 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 STPS120M part is unused and in its original packaging.
Return procedure for STPS120M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS120M 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…
