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Taiwan Semiconductor Corporation SS14MH
- Part No.:
- SS14MH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
SS14MH.pdf
- Description:
- DIODE SCHOTTKY 40V 1A MICRO SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,852
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Product details
Overview
SS14MH from Taiwan Semiconductor is a 1A, 40V AEC-Q101-qualified Schottky barrier rectifier in Micro SMA package, with VF = 0.55V at 1.0A/25°C, IR = 50µA at 25°C, CJ = 50pF at 1MHz/4.0V, and TJ max = 150°C - used for reverse battery protection and DC/DC converter freewheeling in automotive lighting.
For engineers reviewing the SS14MH datasheet, SS14MH pinout, SS14MH application, or SS14MH equivalent, key selection criteria include its 40V VRRM rating, low-profile 0.68mm height, J-STD-020 Level 1 moisture sensitivity, RoHS/halogen-free compliance, and thermal resistance RθJA = 125°C/W.
Technical Context
The SS14MH operates as a single-die Schottky rectifier with unidirectional conduction and cathode-band polarity indication. Its junction capacitance of 50pF at 1MHz/4.0V supports high-frequency switching up to ~1MHz, while its 25A IFSM rating enables robust surge handling in automotive load-dump scenarios.
Thermally, it delivers RθJL = 30°C/W and RθJC = 40°C/W, enabling efficient heat transfer from junction to lead or case. The device maintains stable reverse leakage (IR ≤ 10mA at 125°C) and reduced forward voltage (VF = 0.50V at 1.0A/125°C), critical for efficiency in thermally constrained automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - maximum repetitive reverse blocking voltage; defines safe operating range in 12V/24V automotive systems with transient spikes. |
| IF | 1 A - continuous forward current rating; supports steady-state power delivery in compact DC/DC stages. |
| VF @ 1A/25°C | 0.55 V - forward voltage drop; directly determines conduction loss (0.55W at 1A) and thermal load in high-efficiency designs. |
| IR @ 25°C | 50 µA - reverse leakage current; ensures minimal standby power loss in battery-coupled circuits like reverse polarity protection. |
| CJ @ 1MHz/4V | 50 pF - junction capacitance; limits high-frequency switching speed and EMI generation in MHz-range converters. |
| TJ max | 150 °C - maximum junction temperature; enables operation in under-hood automotive environments without derating. |
Pinout & Package
Package: Micro SMA - surface-mount, single-anode/single-cathode configuration, 0.68mm typical height, matte tin-plated leads, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/source side; must withstand 25A surge during load dump events. |
| Cathode | Forward current exit point | Connected to output/load side; marked by visible cathode band for automated optical inspection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Micro SMA package | 0.68mm profile enables ultra-thin PCB layouts in space-constrained modules such as LED headlamp drivers. |
| J-STD-020 Level 1 moisture sensitivity | Allows unlimited floor life before reflow; eliminates baking requirement and simplifies SMT line integration. |
| RoHS and halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive; supports environmental compliance for global OEM programs. |
Applications
| Reverse Battery Protection | Automotive LED Lighting |
|---|---|
Use Scenario: Prevents damage to vehicle electronics when battery terminals are accidentally reversed during jump-start or service. IC Role / Device Role / Timing Role: Unidirectional power path switch - conducts only when anode voltage exceeds cathode by ≥0.55V. Use Value: Low VF minimizes voltage drop (<0.55V) across protection path, preserving system voltage margin for sensitive controllers. | Use Scenario: Powers high-brightness LED arrays in headlamps, DRLs, and tail lamps with PWM dimming. IC Role / Device Role / Timing Role: Freewheeling diode in buck/boost LED driver stage - recirculates inductor current during switch-off phase. Use Value: 50pF junction capacitance limits switching node ringing, reducing EMI in EMC-sensitive lighting zones. |
| DC/DC Converter Output Stage | Low-Voltage Inverter |
Use Scenario: Output rectification in 12V-to-5V/3.3V synchronous or quasi-synchronous buck converters for infotainment ECUs. IC Role / Device Role / Timing Role: Secondary-side rectifier - conducts during low-side FET off-time to maintain continuous output current. Use Value: 150°C TJ max allows full 1A operation at 85°C ambient without derating, supporting high-power density designs. | Use Scenario: Inverter stage in 12V-to-48V mild-hybrid starter-generator control units. IC Role / Device Role / Timing Role: High-frequency clamping diode - suppresses voltage spikes during MOSFET turn-off in half-bridge topologies. Use Value: 25A IFSM rating absorbs repetitive 8.3ms surge currents from inductive energy release without failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS14 (ON Semiconductor) | VRRM = 40V, VF = 0.55V @1A/25°C, but not AEC-Q101 qualified; RθJA = 130°C/W. | Lacks automotive qualification; suitable for industrial/commercial DC/DC where AEC-Q101 is not mandated. | Select SS14MH when automotive reliability, moisture sensitivity level 1, and 0.68mm height are required. |
| SB140 (Diotec) | VRRM = 40V, VF = 0.52V @1A/25°C, Micro SMA package, but IR = 100µA @25°C (vs. 50µA for SS14MH). | Higher reverse leakage reduces efficiency in always-on battery-protection circuits. | Choose SS14MH over SB140 where low IR is critical for <10µA standby current targets. |
Compared with SS14 and SB140, the SS14MH provides tighter IR control, AEC-Q101 validation, and lower profile - making it preferred for space- and reliability-critical automotive power rails where leakage, qualification, and height are design constraints.
Availability
SS14MH is available at Aetrix Electronics and suitable for reverse battery protection, automotive LED lighting, and DC/DC converter output stages requiring stable component supply across automotive production cycles.
Supply support for SS14MH 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 SS14MH belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-reliability 12V/24V automotive power conversion and protection applications demanding low VF, low profile, and robust surge capability.
FAQ
What is the peak repetitive reverse voltage rating for SS14MH?
The SS14MH has a peak repetitive reverse voltage (VRRM) rating of 40 V, verified per Taiwan Semiconductor's A2103 datasheet. This rating defines the maximum reverse voltage the device can block continuously without breakdown. It is suitable for use in 12V automotive systems with ISO 7637-2 pulse 1/2/5a transients, where clamping or protection circuits must sustain up to 40V reverse bias.
Is SS14MH qualified for automotive applications?
Yes, SS14MH is AEC-Q101 qualified per the official Taiwan Semiconductor datasheet (Version A2103). This qualification covers stress tests including HTGB, HTRB, temperature cycling, and mechanical shock - confirming suitability for under-hood and body-control module applications where reliability and long-term stability are mandatory.
What is the forward voltage drop of SS14MH at 1A and 125°C?
The SS14MH exhibits a forward voltage drop (VF) of 0.50 V at 1.0 A and 125°C, as specified in the Electrical Specifications table of the A2103 datasheet. This reduced VF at elevated temperature improves conduction efficiency in thermally demanding environments such as engine compartment power supplies, compared to room-temperature VF of 0.55 V.
Does SS14MH have a defined junction capacitance value, and under what conditions?
Yes, SS14MH has a junction capacitance (CJ) of 50 pF, measured at 1 MHz and VR = 4.0 V, per the datasheet's Electrical Specifications table. This value is critical for estimating high-frequency switching behavior and EMI in DC/DC converters operating near 1 MHz, and is validated using 50 mVp-p small-signal AC test conditions.
What is the moisture sensitivity level (MSL) of SS14MH, and how does it affect assembly?
The SS14MH is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life before reflow soldering and requires no baking prior to assembly. This simplifies SMT line logistics, eliminates moisture-related popcorning risk, and supports high-yield automated placement in high-volume automotive electronics manufacturing.
SS14MH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- 2-SMD, Flat Leads
- 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:
- 50 µA @ 40 V
- Capacitance @ Vr, F:
- 50pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Micro SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS14MH FAQ
1.How can I place an order for SS14MH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS14MH 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 SS14MH reliable?
The price and inventory of SS14MH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS14MH is usually 5 days.
3.What payment methods are accepted for SS14MH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS14MH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS14MH?
SS14MH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS14MH 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 SS14MH?
For technical support, including SS14MH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS14MH requirements.
6.How does Aetrix verify that SS14MH is sourced from the original manufacturer or authorized distributors?
All SS14MH 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 SS14MH meets industry standards.
7.What is the process for return or replacement of SS14MH?
All SS14MH units undergo pre-shipment inspection (PSI). If there is an issue with SS14MH, 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 SS14MH part is unused and in its original packaging.
Return procedure for SS14MH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SS14MH Tags
-
1N4448X-TP
Micro Commercial Co
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1N4148WX-TP
Micro Commercial Co
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1N4148TR
onsemi
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MMSD4148T1G
onsemi
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MMBD914LT3G
onsemi
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BAS16HT1G
onsemi
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1N914BWT
onsemi
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BAS21LT1G
onsemi
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LL4148
onsemi
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BAS16LT1G
onsemi
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MMSD914T1G
onsemi
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BAV21W-7-F
Diodes Incorporated
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