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Taiwan Semiconductor Corporation SA48CA
- Part No.:
- SA48CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA48CA.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,576
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Product details
Overview
SA48CA 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 48V working stand-off voltage (VWM), 53.3–65.2V breakdown voltage (VBR), and 85.5V maximum clamping voltage (VC) at 6.1A peak pulse current - used for ESD and surge protection in automotive lighting and industrial control interfaces.
For engineers reviewing the SA48CA datasheet, SA48CA pinout, SA48CA application, or SA48CA equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, AEC-Q101 qualification status, thermal derating curves, and real-world protection use cases - critical for IEC 61000-4-2/-4-4 compliance and robust system-level transient immunity design.
Technical Context
The SA48CA operates as a bidirectional avalanche diode, symmetrically clamping transients above ±53.3V in both polarities with sub-nanosecond response (≤5.0ns), enabling protection of differential signal lines and AC-coupled circuits. Its VBR tolerance (min 53.3V, max 65.2V at 1mA test current) and low leakage (<1μA at 48V) ensure minimal standby loading on protected nodes.
Thermal performance is defined by a 175°C maximum junction temperature and 3W steady-state power dissipation at TL = 75°C on 10×10 mm copper pads. The device meets AEC-Q101 stress requirements for automotive under-hood applications and supports repetitive surge events only when derated per Fig.2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for normal circuit bias. |
| VBR (min/max) | 53.3 / 65.2 V @ 1 mA - Breakdown range defines clamping onset window; impacts margin against false triggering. |
| VC @ IPPM | 85.5 V @ 6.1 A - Clamping voltage during 10/1000μs surge; determines maximum stress on downstream ICs. |
| PPK | 500 W - Peak pulse power rating at TA = 25°C; de-rates linearly above 25°C per Fig.2. |
| IR @ VWM | <1 μA - Reverse leakage at stand-off voltage; ensures negligible quiescent current draw in battery-powered systems. |
| TJ max | 175 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| Response time | ≤5.0 ns - Time from 0V to VBR under bidirectional surge; sufficient for EFT and ESD pulse suppression. |
Pinout & Package
SA48CA uses the DO-204AC (DO-15) axial-leaded package with cathode band marking omitted due to bidirectional symmetry; terminals are non-polarized and interchangeable. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No polarity marking required; either lead connects to protected line or ground - identical clamping in both directions. |
| Lead 1 / Lead 2 | Surge current path | Carry full 6.1A peak pulse current during clamping; require ≥10×10 mm copper pads for 3W steady-state dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use including temperature cycling, mechanical shock, and humidity testing per AEC standard. |
| 500W 10/1000μs surge rating | Withstands IEC 61000-4-5 Level 4 (4kV) surges without degradation when properly mounted. |
| Bidirectional clamping | Protects AC signals, transformer-coupled interfaces, and dual-rail analog inputs without external polarity management. |
| Low IR & tight VBR tolerance | <1 μA leakage at 48V and ±11% VBR spread enable stable biasing in precision sensor front-ends. |
| DO-204AC mechanical robustness | UL 94V-0 molding compound and 0.4g mass support high-vibration environments and automated through-hole assembly. |
Applications
| Automotive LED Headlamp Drivers | Industrial PLC Digital Input Modules |
|---|---|
Use Scenario: Protecting MOSFET gate drivers and current-sense amplifiers from load-dump and inductive kickback in 48V LED headlamp systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across driver output and ground to clamp ±100V transients within 5ns. Use Value: Prevents latch-up or permanent damage to 5V logic interfaces while maintaining <1μA standby leakage. | Use Scenario: Shielding 24V DC digital input channels from EFT bursts and field-wiring induced surges in factory automation controllers. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between input terminal and common rail to absorb 4kV EFT pulses per IEC 61000-4-4. Use Value: Enables >100,000 surge cycles without parameter shift, validated per AEC-Q101 reliability testing. |
| Smart Building PoE-Powered Lighting | Medical Diagnostic Sensor Interfaces |
Use Scenario: Safeguarding Ethernet PHY and LED driver ICs in IEEE 802.3af/at powered luminaires exposed to lightning-induced surges on data/power lines. IC Role / Device Role / Timing Role: Bidirectional clamping element across isolated data pairs and secondary-side power rails. Use Value: Maintains 48V VWM compatibility with PoE+ voltage range while delivering 85.5V clamping to preserve PHY ESD tolerance. | Use Scenario: Protecting low-noise instrumentation amplifiers in portable ultrasound transducer front-ends from ESD events during clinical handling. IC Role / Device Role / Timing Role: Low-leakage TVS placed at analog input connector to shunt human-body-model (HBM) discharges before signal conditioning stages. Use Value: Sub-1μA IR prevents DC offset drift in picoamp-level sensor signals; 5ns response avoids pulse distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CA (Bourns) | Same DO-214AA package; 500W rating; VBR = 53.3–65.2V; VC = 77.4V @ 6.7A - lower clamping voltage but higher IPPM. | Preferred where PCB space allows SMT mounting and lower clamping voltage is prioritized over axial-leaded serviceability. | Select SMBJ48CA for automated SMT production and tighter clamping; retain SA48CA for through-hole reliability and AEC-Q101 traceability in legacy designs. |
| P6KE48CA (ON Semiconductor) | DO-204AC package; 500W rating; VBR = 53.3–64.1V; VC = 77.0V @ 6.5A - slightly tighter VBR tolerance and lower VC, but not AEC-Q101 qualified. | Suitable for industrial/commercial systems lacking automotive qualification requirements. | Choose P6KE48CA for cost-sensitive non-automotive applications needing marginally better clamping; specify SA48CA when AEC-Q101 compliance is mandatory. |
Compared with SMBJ48CA and P6KE48CA, SA48CA uniquely combines AEC-Q101 qualification, DO-204AC axial packaging, and verified 175°C TJ operation - making it the only option among the three qualified for under-hood automotive deployment without derating.
Availability
SA48CA is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC input protection, smart building PoE lighting, and medical sensor interface designs requiring stable component supply and long-term lifecycle assurance.
Supply support for SA48CA 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and automotive-qualified components since 1979.
The SA Series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 compliance, wide VWM coverage (5–170V), and robust DO-204AC packaging for harsh thermal and mechanical conditions.
FAQ
What is the clamping voltage of SA48CA at its rated peak pulse current?
The SA48CA has a maximum clamping voltage (VC) of 85.5 V at 6.1 A peak pulse current (IPPM), measured under the standardized 10/1000 μs double-exponential surge waveform. This value is guaranteed across the full operating temperature range and defines the highest voltage seen by downstream circuitry during a worst-case transient event. The SA48CA's clamping performance is consistent in both directions due to its bidirectional construction.
Is SA48CA qualified for automotive applications?
Yes, SA48CA is AEC-Q101 qualified - confirmed in the official Taiwan Semiconductor SA Series datasheet (Version L2105). This qualification covers stress tests including temperature cycling, high-temperature operating life, and mechanical shock, validating its suitability for under-hood automotive use. The "CA" suffix explicitly denotes bidirectional capability and AEC-Q101 compliance per TSC's ordering nomenclature.
What does the "CA" suffix mean in SA48CA?
In the SA Series, the "CA" suffix indicates a bidirectional TVS diode that is also AEC-Q101 qualified. Unlike unidirectional variants (e.g., SA48A), SA48CA provides symmetrical clamping above ±53.3 V and carries formal automotive qualification. The "C" denotes bidirectionality, and the "A" confirms AEC-Q101 compliance - both attributes are integral to the SA48CA part number and cannot be inferred from SA48 or SA48A.
Can SA48CA replace SA48A in a design?
No - SA48CA and SA48A are functionally distinct. SA48A is unidirectional with cathode marking and forward voltage drop (~3.5 V at 35 A), while SA48CA is bidirectional, polarity-insensitive, and lacks a cathode band. Substituting SA48CA for SA48A would eliminate intended DC blocking behavior and may cause unintended conduction in DC-biased circuits. Always verify polarity requirements and clamping symmetry before interchange.
What is the maximum junction temperature rating for SA48CA?
The SA48CA has a maximum junction temperature (TJ) rating of +175°C, as specified in the Absolute Maximum Ratings table. This rating supports operation in high-ambient environments such as automotive engine compartments or industrial enclosures. Derating of peak pulse power is required above TA = 25°C per Figure 2 in the datasheet, and steady-state power dissipation is limited to 3 W at TL = 75°C with 10×10 mm copper pads per lead.
SA48CA 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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 6.7A
- 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)
SA48CA FAQ
1.How can I place an order for SA48CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA48CA 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 SA48CA reliable?
The price and inventory of SA48CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA48CA is usually 5 days.
3.What payment methods are accepted for SA48CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA48CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA48CA?
SA48CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA48CA 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 SA48CA?
For technical support, including SA48CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA48CA requirements.
6.How does Aetrix verify that SA48CA is sourced from the original manufacturer or authorized distributors?
All SA48CA 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 SA48CA meets industry standards.
7.What is the process for return or replacement of SA48CA?
All SA48CA units undergo pre-shipment inspection (PSI). If there is an issue with SA48CA, 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 SA48CA part is unused and in its original packaging.
Return procedure for SA48CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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