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Taiwan Semiconductor Corporation SA48C
- Part No.:
- SA48C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA48C.pdf
- Description:
- 500W, 59.3V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,483
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Product details
Overview
SA48C from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 48V working stand-off voltage (VWM), 53.3–65.2V breakdown voltage (VBR @ 1mA), and 85.5V maximum clamping voltage (VC) at 6.1A peak pulse current. It protects automotive power rails and industrial I/O interfaces against ESD and lightning-induced surges.
For engineers reviewing the SA48C datasheet, SA48C pinout, SA48C application, or SA48C equivalent, this page delivers verified electrical parameters, clamping behavior under 10/1000μs transients, thermal derating curves, polarity marking guidance, and AEC-Q101-qualified alternatives for automotive-grade surge protection design.
Technical Context
The SA48C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (53.3–65.2V at 1mA). Its low dynamic impedance enables rapid clamping to ≤85.5V at 6.1A, limiting energy dissipation in downstream circuitry during 500W, 10/1000μs transients.
Designed for surface-mount or through-hole mounting on 10×10 mm copper pads, it sustains 70A non-repetitive forward surge (8.3ms half-sine) and operates across –55°C to +175°C junction temperature, with <1μA reverse leakage above 10V and <1.0ps response time from 0V to VBR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 53.3 / 65.2 V @ 1 mA - Confirmed breakdown threshold range defining turn-on precision |
| VC @ IPPM | 85.5 V @ 6.1 A - Clamped voltage during full 500W surge, directly limiting IC stress |
| PPK | 500 W - Peak pulse power rating per 10/1000μs waveform, validated per ANSI/IEEE C62.35 |
| TJ max | +175 °C - Maximum junction temperature enabling under-hood automotive deployment |
| IR @ VWM | <1 μA - Negligible leakage at rated stand-off, preserving low-power sensor rail integrity |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with tin-plated leads per J-STD-002 |
Pinout & Package
DO-204AC (DO-15) package with axial leads: cathode indicated by band marking; anode and cathode terminals support through-hole mounting on 10×10 mm copper pads per JEDEC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to protected circuit ground or low-side reference; carries full surge current during clamping |
| Cathode | Reverse voltage sensing / Clamping output node | Connected to protected line (e.g., 48V supply rail); voltage clamped to ≤85.5V during transient |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | SA48CH meets automotive reliability requirements including temperature cycling, HTRB, and ESD testing |
| Fast response time | <1.0 ps from 0V to VBR ensures clamping activation before sensitive logic is exposed to overvoltage |
| Low clamping ratio (VC/VBR) | 1.31 typical (85.5V / 65.2V) - tighter than industry average, reducing margin needed in downstream protection |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing and end-of-life compliance |
| UL 94V-0 molding compound | Flame-retardant encapsulation prevents fire propagation in high-energy fault conditions |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 48V battery-supplied ADAS camera module exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48V input and DC-DC converter input to clamp transients before regulation. Use Value: Limits voltage to ≤85.5V during 500W surges, preventing damage to 100V-rated input capacitors and MOSFETs. | Use Scenario: 24V digital input channel on programmable logic controller subjected to EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: SA48C installed at field-side connector to shunt fast transients (<5ns rise) before signal conditioning circuitry. Use Value: Sub-1ps response ensures clamping initiates before 5ns EFT edge propagates into optocoupler input stage. |
| LED Driver Overvoltage Clamp | Telecom DC Power Feed Protection |
Use Scenario: Constant-current LED driver powered from 48V telecom supply experiencing switching noise and inductive kickback. IC Role / Device Role / Timing Role: TVS connected across driver input terminals to absorb repetitive 100–500W spikes without degradation. Use Value: 175°C max junction temperature supports operation in enclosed, thermally constrained LED housing. | Use Scenario: Remote radio unit powered via 48V PoE-like feed over long cables susceptible to induced lightning surges. IC Role / Device Role / Timing Role: SA48C deployed at power entry point to divert >6kV/3kA common-mode surges per IEC 61000-4-5. Use Value: 500W 10/1000μs rating matches telecom surge test profiles, enabling single-stage front-end protection. |
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 SMAJ48A | Same DO-214AC package; 48V VWM, 53.3–64.8V VBR, 77.4V VC @ 6.7A; AEC-Q101 qualified | Higher IPPM (6.7A vs. 6.1A) and lower VC yield tighter clamping margin in space-constrained layouts | Preferred where board area is limited and AEC-Q101 compliance is mandatory |
| ON Semiconductor 1.5SMC47A | DO-214AB package; 47V VWM, 52.2–63.8V VBR, 77.0V VC @ 19.5A; higher PPK (1500W) | Larger package allows higher surge handling but requires more PCB area; not AEC-Q101 qualified | Selected for industrial systems needing >1kW surge headroom without automotive qualification |
Compared with SA48C, SMAJ48A offers superior clamping voltage and automotive qualification in identical footprint, while 1.5SMC47A trades smaller size for significantly higher surge capacity-making SA48C optimal for cost-sensitive, thermally constrained 48V automotive modules requiring proven DO-15 reliability.
Availability
SA48C is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O cards, LED lighting drivers, and telecom power feeds requiring stable component supply with traceable sourcing and lifecycle continuity.
Supply support for SA48C 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 TVS diodes, rectifiers, and power MOSFETs since 1979.
The SA Series was developed specifically for robust, high-energy transient suppression in automotive and industrial environments, emphasizing AEC-Q101 qualification, tight VBR tolerance, and stable clamping performance across temperature.
FAQ
What is the maximum clamping voltage of SA48C under a 500W surge?
The SA48C exhibits a maximum clamping voltage (VC) of 85.5 V at 6.1 A peak pulse current, corresponding to the standardized 10/1000 μs double-exponential surge waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during full-rated surge events. The SA48C maintains this clamping performance across its specified operating temperature range.
Is SA48C unidirectional or bidirectional, and how is polarity marked?
The SA48C is a unidirectional TVS diode, intended for DC line protection where reverse polarity is not expected. Polarity is marked by a cathode band on the DO-204AC (DO-15) package body - the banded end connects to the protected line (e.g., 48V rail), while the unbanded end connects to ground. Bidirectional variants use "CA" suffix (e.g., SA48CA), which SA48C does not carry.
Does SA48C meet AEC-Q101 qualification, and what does that entail?
The base SA48C is not AEC-Q101 qualified; however, the SA48CH variant (same electrical specs, "H" suffix) is fully AEC-Q101 qualified. Qualification includes stress testing for temperature cycling, high-temperature reverse bias (HTRB), unbiased highly accelerated stress test (uHAST), and ESD per JS-001. SA48CH is recommended for automotive powertrain, chassis, and ADAS applications where reliability under harsh conditions is mandatory.
What is the thermal derating behavior of SA48C above 25°C ambient?
SA48C's peak pulse power (PPK) is derated linearly above TA = 25°C, following the curve in Figure 2 of the datasheet: at 75°C ambient, PPK drops to ~350W; at 125°C, it falls to ~175W. This derating applies to non-repetitive pulses and assumes mounting on 10×10 mm copper pads per terminal. Steady-state power dissipation (PD) remains 3 W up to TL = 75°C lead temperature.
How does SA48C compare to SA48A in terms of breakdown voltage and clamping performance?
SA48C has a VBR range of 53.3–65.2 V at 1 mA, while SA48A specifies 53.3–58.9 V - indicating tighter VBR distribution for the "A" grade. Correspondingly, SA48A clamps at 77.4 V (vs. 85.5 V for SA48C) at its higher IPPM of 6.7 A. Thus, SA48A provides lower clamping voltage and tighter VBR tolerance, making it preferable where precise voltage limiting is critical, whereas SA48C offers broader VBR spread at lower cost.
SA48C 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:
- 85.5V
- Current - Peak Pulse (10/1000µs):
- 6.1A
- 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)
SA48C FAQ
1.How can I place an order for SA48C through Aetrix?
Please submit a Request for Quotation (RFQ) for SA48C 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 SA48C reliable?
The price and inventory of SA48C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA48C is usually 5 days.
3.What payment methods are accepted for SA48C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA48C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA48C?
SA48C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA48C 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 SA48C?
For technical support, including SA48C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA48C requirements.
6.How does Aetrix verify that SA48C is sourced from the original manufacturer or authorized distributors?
All SA48C 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 SA48C meets industry standards.
7.What is the process for return or replacement of SA48C?
All SA48C units undergo pre-shipment inspection (PSI). If there is an issue with SA48C, 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 SA48C part is unused and in its original packaging.
Return procedure for SA48C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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