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Vishay General Semiconductor - Diodes Division SS1FL4HM3/H
- Part No.:
- SS1FL4HM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- DO-219AB
- Datasheet:
-
SS1FL4HM3/H.pdf
- Description:
- DIODE SCHOTTKY 40V 1A DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:15,323
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Product details
Overview
SS1FL4HM3/H from Vishay General Semiconductor is a surface-mount Schottky barrier rectifier in the eSMP® Series, configured as a single diode with 40 V reverse voltage rating, 1.0 A average forward current, and 0.34 V forward voltage at 1.0 A and 125 °C - optimized for DC/DC converters and polarity protection in automotive-grade power supplies.
For engineers reviewing the SS1FL4HM3/H datasheet, SS1FL4HM3/H pinout, SS1FL4HM3/H application, or SS1FL4HM3/H equivalent, key selection criteria include its AEC-Q101 qualification, low VF at high temperature, SOD-123W-compatible SMF (DO-219AB) package, and 150 °C maximum junction temperature for under-hood automotive use.
Technical Context
This Schottky rectifier uses a planar metal-semiconductor junction to achieve fast switching with no minority-carrier storage delay, enabling operation in high-frequency inverters up to several MHz. Its low leakage (7 mA at 125 °C, 40 V) and low thermal resistance (RθJM = 22 °C/W) support stable performance in thermally constrained PCB layouts.
The device is constructed in an SMF (DO-219AB) case with matte tin-plated terminals, meets J-STD-020 MSL Level 1, and passes JESD201 Class 2 whisker testing - confirming suitability for lead-free reflow and automotive production environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - supports input rails up to 36 V nominal automotive systems with margin |
| IF(AV) | 1.0 A - continuous DC output capability for compact 5–12 V DC/DC stages |
| VF @ 1.0 A, 125 °C | 0.34 V - reduces conduction loss by ~30 % vs. standard silicon diodes at elevated temperature |
| IFSM | 40 A - withstands short-duration load dump or startup surge without failure |
| TJ max. | 150 °C - enables operation in engine compartment or sealed industrial enclosures |
| IR @ 40 V, 125 °C | 7 mA - limits standby power loss in always-on automotive modules |
| RθJM | 22 °C/W - allows effective heat transfer to copper mount pad, critical for thermal reliability |
Pinout & Package
SS1FL4HM3/H is housed in the SMF (DO-219AB) surface-mount package - a low-profile, halogen-free, RoHS-compliant case compatible with SOD-123W footprint standards and rated UL 94 V-0. Cathode is marked by a color band on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path) in freewheeling or reverse polarity protection |
| Cathode | Forward current exit point | Marked with color band; connects to positive rail or switch node; blocks reverse current flow |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress test requirements |
| Low VF at high temperature | 0.34 V @ 1.0 A, 125 °C ensures minimal self-heating during sustained load conditions |
| MSL Level 1 rating | Enables unlimited floor life and compatibility with standard reflow profiles up to 260 °C peak |
| Junction capacitance (CJ) | 115 pF @ 4 V - minimizes switching noise and EMI in high-frequency converter designs |
| Halogen-free & RoHS | Complies with automotive environmental mandates and end-of-life recycling requirements |
Applications
| Automotive Polarity Protection | DC/DC Converter Freewheeling |
|---|---|
Use Scenario: Protecting infotainment head units and ADAS ECUs against reverse battery connection during service. IC Role / Device Role / Timing Role: Unidirectional blocking element placed in series with main power input. Use Value: Prevents catastrophic damage with <1.0 A continuous rating and 40 A surge tolerance during fault events. | Use Scenario: Freewheeling path in 300 kHz–1 MHz synchronous buck converters powering radar modules. IC Role / Device Role / Timing Role: Fast-recovery flyback path for inductor current during high-side FET off-time. Use Value: 0.34 V VF at 125 °C reduces conduction loss and improves efficiency over silicon alternatives. |
| Industrial Sensor Power Supply | High-Frequency Inverter Output Clamp |
Use Scenario: Providing isolated 5 V bias to Hall-effect current sensors in motor drives. IC Role / Device Role / Timing Role: Output rectifier in auxiliary flyback supply with tight thermal envelope. Use Value: 150 °C TJ max and RθJM = 22 °C/W enable reliable operation on small FR4 pads without heatsinking. | Use Scenario: Clamping transient voltages across IGBT gates in solar microinverters. IC Role / Device Role / Timing Role: Low-capacitance (115 pF), fast-turn-on clamp diode absorbing switching spikes. Use Value: CJ of 115 pF at 4 V minimizes capacitive loading while maintaining fast response to sub-100 ns transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay SS14HM3/H | 40 V VRRM, 1.0 A IF(AV), but VF = 0.45 V @ 1.0 A, 25 °C - higher conduction loss at room temp | Lacks AEC-Q101 qualification; intended for commercial-grade use only | Select SS1FL4HM3/H when automotive qualification and lower VF at elevated temperature are required |
| ON Semiconductor NSR0140HT1G | 40 V VRRM, 1.0 A IF(AV), VF = 0.43 V @ 1.0 A, 25 °C; same SMF package but no AEC-Q101 listing in datasheet | Not AEC-Q101 qualified; JEDEC MSL Level 1 confirmed, but automotive validation not documented | SS1FL4HM3/H is preferred where OEM compliance documentation and 125 °C VF performance are mandatory |
Compared with SS14HM3/H and NSR0140HT1G, SS1FL4HM3/H delivers lower forward voltage at high temperature and full AEC-Q101 certification - making it the only option among the three validated for under-hood automotive deployment with thermal margin.
Availability
SS1FL4HM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial DC/DC converters, and high-reliability sensor power supplies requiring stable component supply and long-term lifecycle support.
Supply support for SS1FL4HM3/H 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and optoelectronics with emphasis on reliability and application-specific performance.
The SS1FL4HM3/H belongs to Vishay's eSMP® Schottky rectifier product line, engineered for high-efficiency, high-temperature power conversion in automotive and industrial systems where low VF and AEC-Q101 compliance are essential.
FAQ
What is the maximum junction temperature rating for SS1FL4HM3/H?
The SS1FL4HM3/H has a maximum junction temperature (TJ max.) of +150 °C, verified per datasheet revision 13-May-2020. This rating allows the SS1FL4HM3/H to operate reliably in engine bay environments and sealed industrial enclosures where ambient temperatures exceed 105 °C. Derating curves confirm usable current capacity down to 0.5 A at 125 °C mount temperature on standard FR4.
Is SS1FL4HM3/H qualified to AEC-Q101 standards?
Yes, SS1FL4HM3/H is explicitly AEC-Q101 qualified, as confirmed in the Vishay datasheet Document Number 87616. The HM3 suffix denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. This makes SS1FL4HM3/H suitable for automotive powertrain, body control, and ADAS applications requiring certified component reliability.
What package type does SS1FL4HM3/H use, and is it compatible with automated assembly?
SS1FL4HM3/H uses the SMF (DO-219AB) surface-mount package - a low-profile, MSL Level 1 device compatible with standard reflow soldering up to 260 °C peak. Its matte tin-plated terminals meet J-STD-002 and JESD22-B102, and the package is optimized for high-speed pick-and-place machines. The SS1FL4HM3/H footprint matches SOD-123W layout standards.
What is the forward voltage of SS1FL4HM3/H at 1.0 A and 125 °C?
The SS1FL4HM3/H exhibits a forward voltage (VF) of 0.34 V at 1.0 A and 125 °C, per the "ELECTRICAL CHARACTERISTICS" table in the official Vishay datasheet. This value is significantly lower than typical silicon rectifiers and enables reduced conduction losses in thermally demanding applications such as automotive DC/DC converters where the SS1FL4HM3/H operates near its thermal limit.
Does SS1FL4HM3/H have a specified junction-to-mount thermal resistance?
Yes, SS1FL4HM3/H specifies RθJM = 22 °C/W (junction-to-mount), measured with the device mounted on a recommended copper pad area per Figure 1. This parameter quantifies thermal coupling to the PCB mount surface and is critical for estimating junction temperature rise in real-world layouts. The SS1FL4HM3/H datasheet provides derating curves based on this value for accurate thermal design.
SS1FL4HM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- eSMP®
- Package/Case:
- DO-219AB
- 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:
- 500 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 40 V
- Capacitance @ Vr, F:
- 115pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS1FL4HM3/H FAQ
1.How can I place an order for SS1FL4HM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SS1FL4HM3/H 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 SS1FL4HM3/H reliable?
The price and inventory of SS1FL4HM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS1FL4HM3/H is usually 5 days.
3.What payment methods are accepted for SS1FL4HM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS1FL4HM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS1FL4HM3/H?
SS1FL4HM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS1FL4HM3/H 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 SS1FL4HM3/H?
For technical support, including SS1FL4HM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS1FL4HM3/H requirements.
6.How does Aetrix verify that SS1FL4HM3/H is sourced from the original manufacturer or authorized distributors?
All SS1FL4HM3/H 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 SS1FL4HM3/H meets industry standards.
7.What is the process for return or replacement of SS1FL4HM3/H?
All SS1FL4HM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SS1FL4HM3/H, 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 SS1FL4HM3/H part is unused and in its original packaging.
Return procedure for SS1FL4HM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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