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STMicroelectronics STPS140ZY
- Part No.:
- STPS140ZY
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
STPS140ZY.pdf
- Description:
- DIODE SCHOTTKY 40V 1A SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:11,266
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Product details
Overview
STPS140ZY from STMicroelectronics is a single AEC-Q101-qualified automotive Schottky rectifier in SOD-123 package, rated for 1 A average forward current, 40 V repetitive peak reverse voltage, and maximum forward voltage drop of 0.51 V at 100 °C junction temperature. It delivers negligible switching losses and extremely fast switching for low-voltage, high-frequency DC/DC converters and polarity protection in automotive power systems.
For engineers reviewing the STPS140ZY datasheet, STPS140ZY pinout, STPS140ZY application, or STPS140ZY equivalent, key selection criteria include its 150 °C max junction temperature, 500 °C/W junction-to-ambient thermal resistance on epoxy board, AEC-Q101 qualification, ECOPACK®2 compliance, and suitability for free-wheeling diode roles in automotive SMPS.
Technical Context
This Schottky rectifier operates as a unidirectional conduction device with metal–semiconductor junction enabling zero minority-carrier storage and near-instantaneous turn-off. Its 10000 V/µs critical dV/dt rating supports robust operation in noisy automotive transients, while the 0.51 V VF (max) at IF = 1 A and Tj = 100 °C ensures low conduction loss in 12 V system rails.
Thermal performance is defined by Rth(j-a) = 500 °C/W on standard epoxy board, and IR remains ≤5 mA at VR = 40 V and Tj = 100 °C - critical for leakage-sensitive battery-connected circuits. The device's surge capability (IFSM = 5.5 A, tp = 10 ms) enables handling of load-dump-induced inrush currents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 1 A - continuous forward current rating at Tamb = 60 °C; defines steady-state power stage sizing |
| VRRM | 40 V - maximum repetitive reverse voltage; sets upper limit for battery-supplied 12 V system clamping |
| VF (max) | 0.51 V at IF = 1 A, Tj = 100 °C - directly determines conduction loss (P ≈ 0.51 W) in high-duty-cycle applications |
| Tj (max) | +150 °C - maximum operating junction temperature; enables placement near hot engine-control electronics |
| Rth(j-a) | 500 °C/W on epoxy board - quantifies self-heating under 1 A load without heatsink; requires careful PCB copper area planning |
| dV/dt | 10000 V/µs - critical rate-of-rise immunity; prevents false turn-on during fast automotive transients like ISO 7637-2 pulses |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per stress test plan |
Pinout & Package
Package: SOD-123 - surface-mount, two-terminal plastic package with gull-wing leads; dimensions: 2.55–2.85 mm length × 1.4–1.7 mm width × 1.35 mm height; UL94 V0 epoxy, lead-free, ECOPACK®2 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry point | Connected to input rail or switch node; must route with low-inductance trace to minimize voltage overshoot |
| Cathode (K) | Forward current exit point | Connected to ground or return path; serves as reference for reverse-biased blocking during freewheeling |
Key Features
| Feature | Design Value |
|---|---|
| Extremely fast switching | No reverse recovery time (trr ≈ 0 ns); eliminates switching loss and EMI in >100 kHz DC/DC topologies |
| Negligible switching losses | Zero minority-carrier storage enables immediate turn-off; avoids tail current and associated heat generation |
| Very small conduction losses | VF ≤ 0.51 V at 1 A/100 °C yields <0.51 W dissipation - reduces thermal burden in space-constrained modules |
| AEC-Q101 qualification | Validated for automotive underhood environments including -40 °C to +150 °C operation and mechanical shock/vibration |
| ECOPACK®2 compliance | Meets RoHS, halogen-free, and material declaration requirements for global automotive OEM supply chains |
Applications
| Automotive Body Control Module (BCM) | 12 V Automotive DC/DC Converter |
|---|---|
Use Scenario: Reverse polarity protection on 12 V input rail of BCM after fuse box. IC Role / Device Role / Timing Role: Unidirectional blocking diode preventing damage during battery misconnection. Use Value: Withstands 40 V reverse bias and 5.5 A surge (10 ms), ensuring survival during jump-start events and load dump. | Use Scenario: Output freewheeling diode in synchronous buck converter supplying 5 V to infotainment MCU. IC Role / Device Role / Timing Role: Low-VF Schottky conducting during low-side switch off-time to maintain current continuity. Use Value: 0.51 V VF at 100 °C minimizes conduction loss and thermal rise in compact, sealed enclosure. |
| Automotive HVAC Blower Driver | Start-Stop System Energy Recovery |
Use Scenario: Freewheeling path for brushed DC motor drive during PWM off-cycles. IC Role / Device Role / Timing Role: Fast-recovery path for inductive kickback energy, reducing MOSFET voltage stress. Use Value: 10000 V/µs dV/dt rating prevents spurious turn-on during rapid bus voltage transitions in PWM-driven motors. | Use Scenario: Regenerative braking energy recapture diode feeding supercapacitor bank in 12 V start-stop system. IC Role / Device Role / Timing Role: Unidirectional energy transfer element enabling charge flow only from motor to storage. Use Value: 150 °C max junction temperature allows reliable operation adjacent to engine bay electronics with minimal heatsinking. |
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 NSS1C2MT1G | Same SOD-123 package, 1 A/40 V rating, but VF = 0.55 V (max) at 1 A/25 °C; no AEC-Q101 documentation publicly available | Lacks formal automotive qualification; suitable for industrial or consumer-grade 12 V supplies where AEC compliance is not mandated | Select when cost sensitivity outweighs automotive qualification requirement and thermal margin permits higher VF |
| Vishay VS-1EQH04-M3/5AT | SOD-123 package, 1 A/40 V, VF = 0.49 V (typ) at 1 A/25 °C, AEC-Q101 qualified, but IR = 100 µA at VR = 40 V/25 °C (vs. 40 µA for STPS140ZY) | Higher room-temp leakage may impact ultra-low-power always-on circuits; otherwise functionally interchangeable in most automotive SMPS | Prefer when lower forward drop is prioritized and leakage sensitivity is low; verify IR spec against system sleep-current budget |
Compared with NSS1C2MT1G and VS-1EQH04-M3/5AT, STPS140ZY offers the best balance of AEC-Q101 validation, 40 µA max IR at 40 V/25 °C, and documented 0.51 V VF ceiling at elevated temperature - making it optimal for thermally demanding, safety-critical automotive nodes.
Availability
STPS140ZY is available at Aetrix Electronics and suitable for automotive body control modules, 12 V DC/DC converters, HVAC blower drivers, and start-stop energy recovery systems requiring stable component supply across extended product lifecycles.
Supply support for STPS140ZY 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, microcontroller, power, and automotive ICs with strong focus on functional safety and environmental compliance.
The STPS automotive Schottky rectifier product line targets high-reliability, low-loss power conversion in 12 V vehicle networks - specifically engineered for AEC-Q101 compliance, thermal resilience, and fast transient response in engine bay and chassis-mounted electronics.
FAQ
Is STPS140ZY suitable for use in synchronous rectification topologies?
No - STPS140ZY is a passive Schottky rectifier, not a synchronous rectifier controller or MOSFET driver. It functions as a freewheeling or polarity protection diode only. Synchronous rectification requires active gate-controlled MOSFETs with timing logic; this part provides fixed unidirectional conduction without control inputs or gate terminals.
What is the recommended PCB pad layout for thermal performance?
The datasheet specifies a footprint in Figure 11 (DocID023830 Rev 2, p.6) optimized for FR4 epoxy board: 2.8 mm × 1.7 mm solder pads with 0.5 mm spacing. To achieve the rated 500 °C/W Rth(j-a), use minimum 10 mm² copper pour per terminal, avoid thermal relief spokes, and ensure full-surface solder mask defined pads for maximum thermal conduction.
Does STPS140ZY have a specified reverse recovery time (trr)?
No - as a Schottky barrier diode, STPS140ZY has no minority carrier storage, so trr is effectively zero. The datasheet omits trr specification because recovery is limited only by junction capacitance discharge (typically sub-nanosecond). This eliminates reverse recovery loss and associated EMI, distinguishing it from PN-junction rectifiers.
Can STPS140ZY replace a 3 A Schottky in a 12 V automotive circuit?
No - STPS140ZY is rated for 1 A average forward current. Substituting it for a 3 A device risks thermal runaway, especially at ambient temperatures above 60 °C or with insufficient PCB copper. Its 5.5 A surge rating applies only to 10 ms sinusoidal pulses, not continuous operation. Always match IF(AV) and thermal design margins to the original design intent.
STPS140ZY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 40 µA @ 400 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- -40°C ~ 150°C
STPS140ZY FAQ
1.How can I place an order for STPS140ZY through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS140ZY 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 STPS140ZY reliable?
The price and inventory of STPS140ZY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS140ZY is usually 5 days.
3.What payment methods are accepted for STPS140ZY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS140ZY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS140ZY?
STPS140ZY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS140ZY 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 STPS140ZY?
For technical support, including STPS140ZY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS140ZY requirements.
6.How does Aetrix verify that STPS140ZY is sourced from the original manufacturer or authorized distributors?
All STPS140ZY 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 STPS140ZY meets industry standards.
7.What is the process for return or replacement of STPS140ZY?
All STPS140ZY units undergo pre-shipment inspection (PSI). If there is an issue with STPS140ZY, 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 STPS140ZY part is unused and in its original packaging.
Return procedure for STPS140ZY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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