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Taiwan Semiconductor Corporation SS14H
- Part No.:
- SS14H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SS14H.pdf
- Description:
- DIODE SCHOTTKY 40V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:14,389
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Product details
Overview
SS14H from Taiwan Semiconductor is a 40 V, 1 A Schottky barrier rectifier in DO-214AC (SMA) package, optimized for low forward voltage (0.50 V @ 1 A, 25°C) and high surge capability (40 A IFSM), used in DC/DC converters and reverse battery protection circuits.
For engineers reviewing the SS14H datasheet, SS14H pinout, SS14H application, or SS14H equivalent, key selection criteria include its 40 V VRRM rating, 0.50 V forward drop at 1 A/25°C, AEC-Q101 qualification, junction temperature range up to +125°C, and DO-214AC mechanical compatibility with automated SMT placement.
Technical Context
The SS14H operates as a single-die, unidirectional Schottky rectifier with guard ring overvoltage protection and a cathode band polarity indicator. Its 28°C/W junction-to-lead thermal resistance supports reliable power dissipation in compact layouts.
It delivers low conduction loss across automotive and industrial temperature ranges (–55°C to +125°C), with reverse leakage limited to 200 μA at 25°C and 6 mA at 100°C under rated 40 V reverse bias - critical for efficiency-sensitive freewheeling and clamping roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - maximum repetitive reverse voltage before breakdown; defines safe operating margin in 24 V automotive or 36 V industrial bus applications |
| IF | 1 A continuous forward current - supports sustained power delivery in small-footprint DC/DC stages without derating below 75°C ambient |
| VF @ 1 A, 25°C | 0.50 V - enables >92% conduction efficiency at 5 V output, reducing heat generation vs. silicon diodes |
| IFSM | 40 A - handles inrush and transient surges common in automotive load dump or motor commutation events |
| TJ max | +125°C - allows operation in engine bay or enclosed industrial enclosures without active cooling |
| IR @ 40 V, 25°C | 200 μA - minimizes standby power loss in battery-backed systems and reverse-polarity protection circuits |
| RθJL | 28°C/W - enables direct thermal path to PCB copper, supporting >0.8 W power dissipation with 25°C rise above lead temperature |
Pinout & Package
Package: DO-214AC (SMA), surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, and cathode band polarity marking. Weight: 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck converter); requires thermal relief pad for soldering reliability |
| Cathode | Forward current exit / reverse blocking terminal | Marked by visible band; ties to higher-potential rail (e.g., input VBUS); serves as reference for reverse-battery protection logic |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for under-hood ECUs and lighting modules |
| Guard ring structure | Enhances edge termination robustness against voltage transients and localized field crowding, improving long-term stability in noisy 12 V/24 V systems |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard J-STD-020-compliant SMT lines without dry-pack handling |
| High dV/dt capability | 10,000 V/μs - prevents false turn-on during fast-switching MOSFET gate drive transitions or inductive kick events |
| Halogen-free & RoHS compliant | Meets EU Directive 2011/65/EU and IPC-1752A reporting requirements for green manufacturing and end-of-life compliance |
Applications
| Automotive LED Headlamp Driver | Industrial 24 V DC/DC Converter |
|---|---|
Use Scenario: High-efficiency buck converter supplies constant current to multi-string LED arrays in headlamps, subject to cold cranking and load dump transients. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectification stage, conducting during low-side FET off-time. Use Value: 0.50 V VF reduces conduction loss by ~35% vs. standard silicon diode, lowering thermal stress on PCB and extending LED lifetime. | Use Scenario: Isolated flyback or non-isolated buck-boost converter powering PLC I/O modules from 24 V factory bus. IC Role / Device Role / Timing Role: Output rectifier delivering regulated 5 V/3.3 V to microcontroller and sensor subsystems. Use Value: 40 A IFSM withstands startup surges; AEC-Q101 qualification ensures operational integrity across extended temperature cycles in uncooled enclosures. |
| Reverse Battery Protection Circuit | Low-Voltage Inverter for HVAC Blower |
Use Scenario: Prevents damage when 12 V battery is connected with reversed polarity to vehicle infotainment or ADAS control unit. IC Role / Device Role / Timing Role: Series-blocking diode placed between battery input and main power rail. Use Value: 40 V VRRM provides 3× safety margin over nominal 12 V; 200 μA IR at 25°C limits quiescent drain to <2.4 μW per unit. | Use Scenario: Half-bridge inverter driving 12 V DC blower motor in residential HVAC systems, switching at 20–50 kHz. IC Role / Device Role / Timing Role: Freewheeling path for motor winding current during PWM dead time. Use Value: Fast recovery (inherent to Schottky) eliminates minority-carrier tail current, reducing switching losses and EMI generation in motor drive stage. |
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 SB140 | Same DO-214AC package, 40 V VRRM, but VF = 0.55 V @ 1 A/25°C; no AEC-Q101 qualification | Not validated for automotive environments; suitable for commercial-grade power supplies only | Select SB140 only if AEC-Q101 is not required and 50 mV higher VF is acceptable in thermal budget |
| Vishay VS-1EQH04-M3/5AT | 40 V VRRM, 1 A IF, VF = 0.49 V @ 1 A/25°C; AEC-Q101 qualified; RθJA = 80°C/W (vs. SS14H's 88°C/W) | Marginally better thermal performance and matching automotive qualification; identical footprint | VS-1EQH04-M3/5AT offers slightly lower VF and improved thermal resistance - preferred where peak efficiency is prioritized |
Compared with SB140 and VS-1EQH04-M3/5AT, the SS14H balances AEC-Q101 compliance, 0.50 V VF, and proven manufacturability in high-volume automotive SMT lines - making it optimal for cost-sensitive yet reliability-critical applications where thermal margin exceeds 25°C.
Availability
SS14H is available at Aetrix Electronics and suitable for automotive lighting, industrial DC/DC conversion, and reverse battery protection requiring stable component supply and full traceability.
Supply support for SS14H 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The SS14H belongs to TSC's AEC-Q101-qualified Schottky rectifier family designed specifically for high-reliability, high-efficiency power conversion in harsh-environment automotive and industrial applications.
FAQ
What is the maximum junction temperature rating for the SS14H?
The SS14H has a maximum junction temperature (TJ max) of +125°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet revision B2305. This rating applies across the full operating current range and enables use in under-hood automotive locations or sealed industrial enclosures without forced airflow. Derating begins above 75°C ambient, and the device must be mounted on thermally adequate PCB copper to maintain TJ ≤ 125°C under 1 A DC load.
Is the SS14H pin-compatible with other devices in the SS1xH series?
Yes - all SS1xH devices, including SS14H, share identical DO-214AC (SMA) package dimensions, anode/cathode terminal layout, and polarity marking (cathode band). Mechanical interchangeability is confirmed in the Package Outline Dimensions section (page 7) of the B2305 datasheet. However, electrical parameters such as VRRM, VF, and IR differ across the series, so substitution requires validation of voltage and thermal margins in the target circuit.
Does the SS14H meet automotive reliability standards?
Yes, the SS14H is explicitly qualified to AEC-Q101 Rev D for stress testing including HTGB, HTRB, temperature cycling, and ESD. This qualification is stated in the FEATURES section (page 1) of the Taiwan Semiconductor SS12H–SS115H datasheet (B2305). It is approved for use in automotive powertrain, body electronics, and lighting modules where component-level reliability is mandated.
What is the forward voltage of the SS14H at elevated temperature?
At 1 A forward current and 100°C junction temperature, the SS14H exhibits a typical forward voltage of 0.40 V, per the ELECTRICAL SPECIFICATIONS table (page 2) of the B2305 datasheet. This represents a reduction from the 25°C value (0.50 V), characteristic of Schottky diodes, and improves conduction efficiency in thermally demanding applications like engine control units or enclosed power supplies.
How is polarity indicated on the SS14H package?
Polarity on the SS14H is indicated by a distinct cathode band printed on the molded plastic body of the DO-214AC (SMA) package, consistent with JEDEC standard marking conventions. The band identifies the cathode terminal, which must be connected toward the higher-potential node in forward-bias operation. This marking is visible in the Marking Diagram (page 7) and confirmed in the MECHANICAL DATA section of the B2305 datasheet.
SS14H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- 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:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 125°C
SS14H FAQ
1.How can I place an order for SS14H through Aetrix?
Please submit a Request for Quotation (RFQ) for SS14H 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 SS14H reliable?
The price and inventory of SS14H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS14H is usually 5 days.
3.What payment methods are accepted for SS14H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS14H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS14H?
SS14H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS14H 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 SS14H?
For technical support, including SS14H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS14H requirements.
6.How does Aetrix verify that SS14H is sourced from the original manufacturer or authorized distributors?
All SS14H 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 SS14H meets industry standards.
7.What is the process for return or replacement of SS14H?
All SS14H units undergo pre-shipment inspection (PSI). If there is an issue with SS14H, 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 SS14H part is unused and in its original packaging.
Return procedure for SS14H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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