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Taiwan Semiconductor Corporation SA14CH
- Part No.:
- SA14CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA14CH.pdf
- Description:
- 500W, 17.4V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,952
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Product details
Overview
SA14CH from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 14V working stand-off voltage (VWM), 15.6–19.1V breakdown voltage (VBR), and 25.8V clamping voltage (VC) at 20.3A peak pulse current. It delivers AEC-Q101 qualification for automotive-grade surge immunity and protects power rails and signal lines against ESD and inductive switching transients.
For engineers reviewing the SA14CH datasheet, SA14CH pinout, SA14CH application, or SA14CH equivalent, key selection criteria include its 14V VWM compatibility with 12V automotive systems, sub-1ps response time for ESD suppression, 175°C junction rating for under-hood use, and AEC-Q101 qualification status - all critical for robust front-end protection in automotive ECUs and industrial controllers.
Technical Context
The SA14CH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 15.6–19.1V breakdown range at 1mA test current. Its low dynamic impedance enables rapid clamping to ≤25.8V during 10/1000μs surges up to 500W, limiting energy dissipation in downstream circuitry.
Designed for high-reliability environments, it features pure tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, and JESD201 Class 2 whisker resistance. The device sustains 70A non-repetitive forward surge current and maintains <1μA leakage above 10V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before conduction begins; matches 12V nominal automotive supply rails with margin. |
| VBR min/max | 15.6 / 19.1 V - Breakdown occurs within this range at 1 mA; ensures reliable triggering without premature conduction. |
| VC @ IPPM | 25.8 V - Clamped voltage at 20.3 A peak pulse; limits stress on protected ICs during ISO 7637-2 or IEC 61000-4-5 transients. |
| PPK | 500 W - Peak pulse power handling at 10/1000 μs waveform; supports high-energy load dump and inductive kick events. |
| TJ max | 175 °C - Maximum junction temperature; enables operation in engine compartment and industrial enclosures without derating. |
| IR @ VWM | <1 μA - Reverse leakage at 14 V; minimizes standby power loss in always-on circuits. |
| Response time | <1.0 ps - Time from 0 V to VBR onset; provides near-instantaneous ESD protection per IEC 61000-4-2. |
Pinout & Package
Package: DO-204AC (DO-15), axial leaded, epoxy-molded case with cathode band marking for unidirectional polarity. Meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; carries full surge current during clamping. |
| Cathode | Protected line connection | Connected to the line being protected (e.g., 12V rail); reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors per stress test requirements. |
| 500W 10/1000μs surge rating | Withstands high-energy transients such as ISO 7637-2 Pulse 5a (load dump) without degradation. |
| <1 ps response time | Clamps ESD events (IEC 61000-4-2 ±8 kV contact) before sensitive logic inputs are damaged. |
| DO-204AC (DO-15) package | Industry-standard axial footprint compatible with legacy PCB layouts and automated through-hole assembly. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing and end-of-life processing. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V supply input of engine control unit (ECU) against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input, clamping surges within nanoseconds. Use Value: Limits voltage to ≤25.8V during 500W transients, preventing damage to LDOs and microcontrollers rated for 36V absolute max. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from EFT and ESD in factory automation PLC modules. IC Role / Device Role / Timing Role: TVS placed at connector interface, shunting fast transients before they reach op-amp input stages. Use Value: Sub-1ps response ensures clamping occurs before 150ns EFT bursts propagate into signal chain, preserving measurement integrity. |
| LED Lighting Driver Protection | Telecom Power Input Protection |
Use Scenario: Safeguarding constant-current LED driver ICs in automotive headlamp modules from inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional SA14CH mounted across driver input, conducting surge current away from internal MOSFETs. Use Value: 70A IFSM rating handles repetitive inductive kick from PWM-driven solenoids and relays without thermal runaway. | Use Scenario: Front-end protection of 12V telecom power supplies subjected to lightning-induced surges on PoE or auxiliary lines. IC Role / Device Role / Timing Role: TVS deployed at board edge, absorbing IEC 61000-4-5 Level 4 (4kV) surges before reaching DC-DC converter. Use Value: 500W PPK and 175°C TJ rating ensure sustained performance in sealed, high-ambient telecom cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ14A | Same DO-204AC package, 14V VWM, but bidirectional; 27.2V VC @ 21.3A; no AEC-Q101 qualification. | Used in generic industrial/commercial systems where bidirectional clamping is required and automotive qualification is not mandated. | Select SMAJ14A only if bidirectional protection is needed and AEC-Q101 compliance is unnecessary. |
| ON Semiconductor 1.5SMC14A | DO-214AB (SMC) surface-mount package; identical 14V VWM and unidirectional configuration; 25.8V VC @ 20.3A; AEC-Q101 qualified. | Preferred for space-constrained PCBs requiring SMT assembly; not suitable for through-hole legacy designs. | Choose 1.5SMC14A when migrating to surface-mount layout and needing same electrical specs with AEC-Q101. |
Compared with SMAJ14A and 1.5SMC14A, the SA14CH uniquely combines AEC-Q101 qualification, DO-204AC through-hole compatibility, and 14V unidirectional clamping - making it the only option meeting automotive mechanical and reliability requirements while retaining legacy board support.
Availability
SA14CH is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, LED lighting drivers, and telecom power input stages requiring stable component supply across long production lifecycles.
Supply support for SA14CH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101-compliant production lines.
The SA Series was developed specifically for automotive and industrial transient suppression, emphasizing high surge robustness, low clamping voltage, and extended temperature operation - directly addressing ISO 7637-2 and IEC 61000-4-5 compliance needs.
FAQ
What does the "H" suffix in SA14CH signify?
The "H" suffix in SA14CH indicates AEC-Q101 qualification, confirming that the device has passed rigorous stress testing for automotive applications including temperature cycling, humidity bias, and mechanical shock. SA14CH is fully tested and certified per AEC-Q101 Rev D, distinguishing it from standard SA14 variants used in commercial-grade designs.
Is SA14CH unidirectional or bidirectional?
SA14CH is a unidirectional TVS diode, designed to clamp only in reverse bias - ideal for protecting positive DC rails like 12V automotive systems. Its cathode band marking identifies polarity, and it does not conduct in forward direction beyond typical diode drop. Bidirectional versions in the SA series carry "CA" or "A" suffixes (e.g., SA14A).
What is the maximum clamping voltage of SA14CH and under what test condition?
The maximum clamping voltage of SA14CH is 25.8 V, measured at 20.3 A peak pulse current (IPPM) using the standardized 10/1000 μs double-exponential surge waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events.
Can SA14CH replace SA14 in an existing design?
Yes, SA14CH is a direct replacement for SA14 in terms of electrical parameters and DO-204AC packaging, with the added benefit of AEC-Q101 qualification. No PCB or schematic changes are required; however, SA14CH should be selected specifically when automotive reliability validation is mandated, as SA14 lacks formal AEC-Q101 certification.
What is the junction-to-ambient thermal resistance (RθJA) for SA14CH?
The datasheet does not specify RθJA for SA14CH; instead, thermal performance is characterized via steady-state power dissipation (PD = 3 W at TL = 75°C with 9.5 mm lead lengths) and maximum junction temperature (TJ max = 175°C). For thermal design, users must apply the derating curve in Figure 2 and ensure adequate copper pad area (10 × 10 mm per terminal) to meet power handling requirements.
SA14CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- SA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 25.8V
- Current - Peak Pulse (10/1000µs):
- 20.3A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA14CH FAQ
1.How can I place an order for SA14CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA14CH 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 SA14CH reliable?
The price and inventory of SA14CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA14CH is usually 5 days.
3.What payment methods are accepted for SA14CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA14CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA14CH?
SA14CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA14CH 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 SA14CH?
For technical support, including SA14CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA14CH requirements.
6.How does Aetrix verify that SA14CH is sourced from the original manufacturer or authorized distributors?
All SA14CH 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 SA14CH meets industry standards.
7.What is the process for return or replacement of SA14CH?
All SA14CH units undergo pre-shipment inspection (PSI). If there is an issue with SA14CH, 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 SA14CH part is unused and in its original packaging.
Return procedure for SA14CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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