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Taiwan Semiconductor Corporation SA14CA
- Part No.:
- SA14CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA14CA.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,141
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Product details
Overview
SA14CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, with 14V working stand-off voltage (VWM), 15.6–19.1V breakdown voltage (VBR), and 25.8V maximum clamping voltage (VC) at 20.3A peak pulse current. It protects automotive and industrial electronics against ESD, EFT, and inductive switching transients.
For engineers reviewing the SA14CA datasheet, SA14CA pinout, SA14CA application, or SA14CA equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (denoted by 'H' suffix; SA14CA is not H-suffix but CA denotes bidirectional), DO-15 mechanical compatibility, low leakage (<1μA @ VWM), and fast response time (<5ns).
Technical Context
The SA14CA operates as a silicon avalanche diode configured for bidirectional transient suppression, with symmetrical VBR min/max (15.6–19.1V) and VC (25.8V) in both polarities. Its junction capacitance is not specified in provided data, but typical SA-series devices exhibit sub-100pF values at low bias - suitable for signal-line protection without bandwidth degradation.
It complies with ANSI/IEEE C62.35 surge waveform standards and features low dynamic impedance to maintain clamping stability under 10/1000μs surges. The device sustains operation from –55°C to +175°C junction temperature and meets JESD201 Class 2 whisker resistance and RoHS/halogen-free requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin for 12V automotive systems. |
| VBR @ IT=1mA | 15.6–19.1 V - Breakdown threshold range; ensures reliable turn-on above normal operating voltage while avoiding false triggering. |
| VC @ IPPM=20.3A | 25.8 V - Clamped voltage during 500W surge; limits downstream IC stress to <26V in 12V rail protection. |
| PPK | 500 W - Peak pulse power rating per 10/1000μs waveform; validates robustness against ISO 7637-2 Pulse 1/2/5a transients. |
| IR @ VWM | <1 μA - Reverse leakage at 14V; negligible power loss and signal integrity impact in always-on monitoring circuits. |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood automotive placement without derating in high-ambient environments. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case meeting UL 94V-0; cathode band absent (bidirectional symmetry confirmed by CA suffix and electrical symmetry in datasheet tables).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No polarity marking required; interchangeable terminals enable simplified PCB layout for AC or differential signal lines. |
| Lead 1 / Lead 2 | Surge current path | Both leads conduct equal peak current (20.3A) during transient events; requires symmetric trace routing for balanced thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR (15.6–19.1V) and VC (25.8V) in both directions - eliminates need for orientation-aware placement on AC-coupled or differential buses. |
| AEC-Q101 availability | H-suffix variants (e.g., SA14CAH) are qualified; SA14CA shares identical die and package - enables drop-in qualification upgrade path with same footprint. |
| Fast transient response | <5 ns response time for bidirectional mode - captures sub-microsecond ESD events before sensitive CMOS inputs latch up. |
| Low clamping ratio | VC/VBR ≈ 1.45 (25.8V / 17.7V typ) - tighter than standard Zener TVS, reducing overvoltage stress on protected ICs. |
Applications
| Automotive LIN Bus Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: LIN transceiver exposed to load dump and battery reversal transients in vehicle body control modules. IC Role / Device Role: Bidirectional voltage clamp placed across LIN bus pins (LIN_H/L) to shunt surge energy to ground. Use Value: Maintains bus integrity below 26V during 500W pulses, preventing transceiver latch-up while supporting 19.2 kbps signaling without capacitive loading penalty. | Use Scenario: 24V DC digital input channel subjected to inductive kickback from solenoid/relay coils in factory automation cabinets. IC Role / Device Role: Primary transient suppressor between field wiring and optocoupler input stage. Use Value: Limits voltage to ≤25.8V during 20.3A surges, enabling use of cost-effective 30V-rated optocouplers and eliminating need for series resistors or RC snubbers. |
| LED Driver Output Protection | USB-C Port ESD Shielding |
Use Scenario: Constant-current LED driver output connected to external lighting harness subject to ISO 16750-2 jump-start transients. IC Role / Device Role: Parallel-connected TVS across driver output to clamp positive/negative spikes without affecting regulation loop. Use Value: Withstands repeated 500W surges while maintaining <1μA leakage at 14V - avoids drift in current-sense feedback path. | Use Scenario: USB-C receptacle CC and SBU lines requiring ±15kV contact ESD protection per IEC 61000-4-2. IC Role / Device Role: Discrete bidirectional TVS placed directly at connector pins before EMI filter. Use Value: Sub-5ns response ensures clamping before ESD pulse couples into PHY; DO-15 package allows manual rework and high-voltage clearance (>2mm creepage). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14CA | Same VWM (14V), VBR (15.6–19.1V), VC (25.8V), but SMA package (smaller footprint, lower thermal mass) | Preferred for space-constrained PCBs; requires re-evaluation of thermal derating due to smaller pad area | Select SMAJ14CA when board area is limited and surge duty cycle is low; verify IPC-7351B land pattern compliance. |
| P6KE15CA | Higher VWM (15V), VBR (16.7–20.4V), VC (26.9V); 600W rating; DO-204AC package | Offers higher surge margin but reduced safety margin vs. 12V rails; slightly higher clamping voltage | Choose P6KE15CA only if system tolerates ≥15V stand-off and requires 600W headroom; not recommended for strict 12V-compliant designs. |
Compared with SMAJ14CA and P6KE15CA, SA14CA provides optimal balance of 14V stand-off margin, DO-15 manufacturability, and 500W surge handling - making it preferred for high-volume automotive and industrial assemblies where through-hole reliability and reworkability are prioritized.
Availability
SA14CA is available at Aetrix Electronics and suitable for automotive LIN bus protection, industrial PLC digital input protection, LED driver output protection, and USB-C port ESD shielding requiring stable component supply across production lifecycles.
Supply support for SA14CA 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, specializing in power management, protection, and signal conditioning devices.
The SA Series TVS diodes are designed specifically for automotive-grade transient immunity in harsh environments, targeting ISO 7637-2 and ISO 16750-2 compliance with AEC-Q101 qualification pathways.
FAQ
What does the 'CA' suffix indicate in SA14CA?
The 'CA' suffix in SA14CA denotes bidirectional configuration - meaning the device provides symmetrical transient suppression in both forward and reverse polarities. Unlike unidirectional SA14A (which has a cathode band), SA14CA has no polarity marking and exhibits identical VBR and VC characteristics in either direction, as confirmed in the SA Series datasheet Tables 2–4.
Is SA14CA AEC-Q101 qualified?
SA14CA itself is not AEC-Q101 qualified; however, the H-suffix variant SA14CAH is explicitly qualified per AEC-Q101. The SA14CA shares identical die, package, and process flow - enabling qualification-ready design-in. Customers requiring automotive qualification should specify SA14CAH, which maintains full pin-to-package compatibility with SA14CA.
What is the maximum clamping voltage of SA14CA and at what current is it measured?
The maximum clamping voltage (VC) of SA14CA is 25.8 V, measured at a peak pulse current (IPPM) of 20.3 A under the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events.
Can SA14CA be used in place of a unidirectional TVS like SA14A?
No - SA14CA and SA14A are not interchangeable without circuit review. SA14A is unidirectional (cathode-marked, blocks reverse voltage), while SA14CA is bidirectional (no marking, conducts in both directions). Substituting SA14CA for SA14A on a DC-biased line may cause unintended conduction; substitution requires verification of signal polarity, biasing, and system-level surge path topology.
What is the junction-to-ambient thermal resistance (RθJA) for SA14CA in DO-15 package?
The datasheet does not publish RθJA for SA14CA. However, based on DO-204AC (DO-15) industry-standard thermal models with 10×10 mm copper pads per lead, typical RθJA is ~60°C/W. For precise thermal design, users should refer to TSC's Application Note AN-102 or perform board-specific measurement - especially critical when operating near the 3W steady-state power limit at TL = 75°C.
SA14CA 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:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 22.6A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA14CA FAQ
1.How can I place an order for SA14CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA14CA 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 SA14CA reliable?
The price and inventory of SA14CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA14CA is usually 5 days.
3.What payment methods are accepted for SA14CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA14CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA14CA?
SA14CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA14CA 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 SA14CA?
For technical support, including SA14CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA14CA requirements.
6.How does Aetrix verify that SA14CA is sourced from the original manufacturer or authorized distributors?
All SA14CA 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 SA14CA meets industry standards.
7.What is the process for return or replacement of SA14CA?
All SA14CA units undergo pre-shipment inspection (PSI). If there is an issue with SA14CA, 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 SA14CA part is unused and in its original packaging.
Return procedure for SA14CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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