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STMicroelectronics STPS2L40ZFY
- Part No.:
- STPS2L40ZFY
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SOD-123F
- Datasheet:
-
STPS2L40ZFY.pdf
- Description:
- DIODE SCHOTTKY 40V 2A SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:14,081
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Product details
Overview
STPS2L40ZFY from STMicroelectronics is an AEC-Q101-qualified automotive Schottky rectifier in SOD123Flat package, rated for 2 A average forward current and 40 V repetitive peak reverse voltage, with typical forward voltage drop of 0.50 V at 125 °C and 2 A, used for polarity protection and freewheeling in low-voltage DC/DC converters and automotive power systems.
For engineers reviewing the STPS2L40ZFY datasheet, STPS2L40ZFY pinout, STPS2L40ZFY application, or STPS2L40ZFY equivalent, key selection criteria include junction-to-lead thermal resistance (20 °C/W), avalanche capability (65 W at 10 µs), conduction loss equation (P = 0.46×IF(AV) + 0.075×IF²(RMS)), and SOD123Flat surface-mount compatibility with PPAP support.
Technical Context
This Schottky rectifier operates with negligible switching losses due to majority-carrier conduction and features specified avalanche capability up to 65 W at 10 µs pulse width and 125 °C junction temperature. Its low VF (0.50 V typ. at 125 °C, 2 A) enables high-efficiency operation in 12 V and 24 V automotive subsystems.
The device is qualified per AEC-Q101 and supports PPAP documentation, with thermal performance defined by Rth(j-l) = 20 °C/W and maximum junction temperature of 175 °C. It uses epoxy-molded SOD123Flat packaging compliant with UL94 V0 and ECOPACK® environmental standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 2 A - continuous forward current rating at TL = 145 °C, defining maximum steady-state DC load handling |
| VRRM | 40 V - maximum repetitive reverse voltage before breakdown, suitable for 12 V/24 V automotive bus protection |
| VF (typ.) | 0.50 V at Tj = 125 °C, IF = 2 A - low conduction loss enabling >92% efficiency in 5–12 V buck converters |
| Tj (max.) | 175 °C - maximum operating junction temperature, supporting under-hood deployment without derating |
| Rth(j-l) | 20 °C/W - junction-to-lead thermal resistance, enabling direct PCB copper pad heat sinking without external heatsink |
| PARM | 65 W at tp = 10 µs, Tj = 125 °C - avalanche energy handling capacity for transient overvoltage suppression |
| IR (max.) | 10 mA at Tj = 125 °C, VR = VRRM - reverse leakage limiting self-heating during high-temp standby |
Pinout & Package
SOD123Flat is a surface-mount, two-terminal plastic package with gull-wing leads, optimized for automated placement and reflow soldering. Dimensions: L = 0.45–0.85 mm, D = 2.50–2.70 mm, E = 1.50–1.80 mm, HD = 3.30–3.70 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry point | Connected to input/high-side rail in freewheeling or reverse-polarity protection configurations |
| Cathode (K) | Forward current exit point | Connected to ground or return path; forms low-VF conduction path when forward-biased |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive power electronics including engine control, body modules, and ADAS sensors |
| Negligible switching losses | Majority-carrier operation eliminates minority-carrier storage delay, enabling >1 MHz switching in DC/DC stages |
| Low VF (0.50 V typ.) | Reduces conduction loss by ~35% vs. standard silicon diodes at 2 A, lowering thermal stress on PCB copper |
| Avalanche capability | 65 W single-pulse energy rating allows safe clamping of inductive kickback in motor drivers and solenoid controls |
| PPAP capable | Full production documentation package available for Tier-1 automotive supplier audits and APQP compliance |
Applications
| Automotive Polarity Protection | DC/DC Converter Freewheeling |
|---|---|
Use Scenario: Preventing damage from battery reverse connection in infotainment head units and telematics gateways. IC Role / Device Role / Timing Role: Schottky rectifier placed in series with main power input to block reverse current while minimizing voltage drop. Use Value: 0.50 V VF ensures <0.6 V total input loss at 2 A, preserving system margin in 12 V nominal designs. | Use Scenario: Energy recirculation path in synchronous buck regulators powering ADAS camera modules. IC Role / Device Role / Timing Role: Low-loss freewheeling diode replacing MOSFET body diode during high-side switch off-time. Use Value: Negligible reverse recovery time eliminates switching node ringing and EMI in 500 kHz–1 MHz converters. |
| Low-Voltage Inverter Output Stage | Engine Control Unit (ECU) Power Rail Clamp |
Use Scenario: Output rectification in 24 V bidirectional DC/AC inverters for electric power steering auxiliary supplies. IC Role / Device Role / Timing Role: High-frequency output rectifier handling PWM-modulated AC waveforms up to 20 kHz. Use Value: 175 °C max junction temperature supports sustained operation near hot ECU housings without thermal throttling. | Use Scenario: Transient voltage clamp across microcontroller supply rails during load dump events in engine control modules. IC Role / Device Role / Timing Role: Avalanche-rated Schottky absorbing inductive energy spikes from fuel injector drivers. Use Value: 65 W avalanche power rating sustains 10 µs pulses without degradation, meeting ISO 7637-2 Pulse 5a requirements. |
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 NSS2L40MZT1G | Same SOD123Flat package, VF = 0.52 V (typ., 125 °C), IFSM = 40 A (vs. 50 A) | Limited to non-PPAP automotive programs; no explicit AEC-Q101 test report published | Preferred where cost sensitivity outweighs PPAP requirement and surge margin is relaxed |
| Vishay VS-2EY40HM3 | DO-214AC (SMA) package, VF = 0.55 V (typ., 125 °C), Rth(j-a) = 50 °C/W (vs. 20 °C/W j-l) | Requires larger PCB footprint and external thermal relief; not qualified to AEC-Q101 | Used only when legacy SMA layout prohibits SOD123Flat adoption and thermal budget permits higher Rth |
Compared with NSS2L40MZT1G and VS-2EY40HM3, STPS2L40ZFY uniquely combines AEC-Q101 qualification, PPAP readiness, superior thermal resistance (20 °C/W j-l), and highest surge rating (50 A IFSM), making it the sole choice for safety-critical automotive power rails requiring full audit traceability.
Availability
STPS2L40ZFY is available at Aetrix Electronics and suitable for automotive polarity protection, DC/DC converter freewheeling, and engine control unit power rail clamping requiring stable component supply across multi-year vehicle production cycles.
Supply support for STPS2L40ZFY 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 analog, MCU, power, and automotive-grade components for industrial, automotive, and consumer markets.
STPS2L40ZFY belongs to ST's automotive-qualified Schottky rectifier product line, engineered specifically for high-reliability, low-loss power conversion in harsh-environment vehicle subsystems.
FAQ
Is STPS2L40ZFY suitable for 48 V mild-hybrid automotive systems?
No. With a 40 V VRRM rating, STPS2L40ZFY is designed for 12 V and 24 V nominal systems only. For 48 V architectures, ST recommends STPS3L60S or STPS5L60, both rated at ≥60 V VRRM and qualified to AEC-Q101.
What is the minimum copper area required under each lead for thermal compliance?
Per Figure 8 in the datasheet, a 1.4 cm² copper surface per lead achieves Rth(j-a) ≈ 50 °C/W on FR4. However, since STPS2L40ZFY is characterized by Rth(j-l) = 20 °C/W, thermal design should prioritize direct conduction to internal ground/power planes via wide traces-not ambient dissipation.
Does STPS2L40ZFY require a heatsink in 2 A continuous operation?
No. At 2 A IF(AV) and 0.50 V VF, power dissipation is ~1.0 W. With Rth(j-l) = 20 °C/W and adequate PCB copper (≥2 cm² per lead), junction temperature rise remains <25 °C above board temperature-well within the 175 °C limit without external heatsinking.
Can STPS2L40ZFY replace a standard PN-junction diode in an existing design?
Yes, provided reverse voltage does not exceed 40 V and layout accommodates SOD123Flat footprint. The lower VF reduces conduction loss and thermal stress, but note that Schottky devices exhibit higher IR at elevated temperatures-verify leakage impact on standby current in battery-powered modules.
STPS2L40ZFY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 630 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 35 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
- Operating Temperature - Junction:
- -40°C ~ 175°C
STPS2L40ZFY FAQ
1.How can I place an order for STPS2L40ZFY through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS2L40ZFY 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 STPS2L40ZFY reliable?
The price and inventory of STPS2L40ZFY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS2L40ZFY is usually 5 days.
3.What payment methods are accepted for STPS2L40ZFY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS2L40ZFY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS2L40ZFY?
STPS2L40ZFY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS2L40ZFY 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 STPS2L40ZFY?
For technical support, including STPS2L40ZFY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS2L40ZFY requirements.
6.How does Aetrix verify that STPS2L40ZFY is sourced from the original manufacturer or authorized distributors?
All STPS2L40ZFY 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 STPS2L40ZFY meets industry standards.
7.What is the process for return or replacement of STPS2L40ZFY?
All STPS2L40ZFY units undergo pre-shipment inspection (PSI). If there is an issue with STPS2L40ZFY, 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 STPS2L40ZFY part is unused and in its original packaging.
Return procedure for STPS2L40ZFY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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