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Taiwan Semiconductor Corporation SA26C
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- Part No.:
- SA26C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA26C.pdf
- Description:
- 500W, 32.1V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,400
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Product details
Overview
SA26C from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode with 26V working stand-off voltage, 28.9–35.3V breakdown voltage at 1mA test current, and 45.4V maximum clamping voltage at 11A peak pulse current - designed for automotive and industrial ESD/inductive load surge protection in DC power rails and signal lines.
For engineers reviewing the SA26C datasheet, SA26C pinout, SA26C application, or SA26C equivalent, this device delivers fast sub-nanosecond response (<1.0ps), low leakage (<1μA @ 26V), AEC-Q101 qualification (per SA26CH variant), DO-15 package compatibility, and robust 175°C junction temperature operation - critical for automotive body electronics, LED drivers, and industrial PLC I/O protection.
Technical Context
The SA26C operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its VBR range (28.9–35.3V) to clamp transients while maintaining <1μA leakage at 26V. Its 500W peak pulse power rating is defined per 10/1000μs waveform, with clamping performance validated at 11A IPPM yielding ≤45.4V VC.
Thermal design relies on DO-15 package dissipation limits: 3W steady-state at TL = 75°C (with 9.5mm lead length), derated above 25°C ambient per Fig.2; junction temperature must remain within −55°C to +175°C during operation and storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before conduction begins; sets system rail margin for 24V DC applications. |
| VBR @ IT=1mA | 28.9–35.3 V - Breakdown voltage range defining turn-on threshold; ensures reliable clamping above nominal rail. |
| VC @ IPPM=11A | ≤45.4 V - Clamping voltage under 10/1000μs surge; limits downstream IC stress during 500W transient events. |
| PPK | 500 W - Peak pulse power handling per 10/1000μs waveform; supports high-energy EFT and load-dump immunity. |
| IR @ VWM | <1 μA - Reverse leakage at 26V; minimizes standby power loss and avoids false triggering in low-current circuits. |
| TJ MAX | +175 °C - Maximum junction temperature; enables under-hood automotive deployment without thermal derating penalties. |
| Response Time | <1.0 ps - Avalanche initiation delay from 0V to VBR; provides near-instantaneous protection against fast ESD pulses. |
Pinout & Package
SA26C uses the DO-204AC (DO-15) axial-leaded package with cathode band marking for polarity identification. 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 | Forward current path / Ground reference | Connected to circuit ground or low-side return; conducts during forward surge (e.g., inductive kickback reversal). |
| Cathode | Protected line input / High-side connection | Connected to protected node (e.g., 24V rail); blocks normal operation but avalanches into conduction during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option | SA26CH variant available - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
| Low clamping ratio | VC/VBR ≈ 1.3–1.6 - Tight voltage margin between breakdown and clamping ensures minimal overvoltage exposure to protected ICs. |
| Ultra-fast response | <1.0 ps rise-to-breakdown - Eliminates latency in ESD protection, critical for high-speed data lines and microcontroller I/O pins. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS - Supports environmentally compliant manufacturing and end-of-life recycling requirements. |
| High surge current capability | IPPM = 11 A @ 10/1000μs - Handles repetitive load-switching transients in solenoid drivers and motor control feedback paths. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 24V CAN/LIN bus interface ICs and microcontroller GPIOs from load dump and battery reverse polarity events in vehicle door modules and lighting controllers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24V supply rail and ground, clamping transients before they reach power management ICs and communication transceivers. Use Value: Limits clamped voltage to ≤45.4V during 500W surges, preserving 30V-rated LDOs and 5V logic supplies downstream without derating or additional filtering. |
Use Scenario: Safeguarding 24V digital input channels of programmable logic controllers against field-wiring induced surges and inductive kickback from relay coils and solenoids. IC Role / Device Role / Timing Role: Front-end transient suppressor on each isolated input channel, absorbing energy before optocoupler or Schmitt-trigger input stages. Use Value: With 11A peak pulse current handling and <1μA leakage, SA26C prevents false triggering during normal operation while surviving repeated 10/1000μs transients per IEC 61000-4-5 Level 3. |
| LED Driver Power Supply Protection | Telecom Power Interface Protection |
Use Scenario: Shielding constant-current LED driver ICs and MOSFET switches from voltage spikes generated by long cable runs and hot-plug events in streetlight and signage systems. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC input terminals of buck/boost LED controllers, diverting surge current away from sensitive gate drivers and current-sense amplifiers. Use Value: 45.4V clamping voltage ensures LED string forward voltage (typically 20–36V) remains within safe operating area during 500W transients, avoiding latch-up or thermal runaway. |
Use Scenario: Providing secondary-level surge immunity on 24V/48V telecom power feeds entering remote radio units and base station backhaul equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-line TVS on DC input stage, coordinated with upstream GDTs or MOVs to achieve staged clamping and extend system-level surge withstand capability. Use Value: Sub-nanosecond response ensures SA26C activates before slower primary protectors, reducing let-through energy and enabling compact, high-reliability telecom power entry designs. |
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 SMAJ26A | Same DO-214AC package; slightly higher VBR (28.9–32.0V), lower VC (42.1V @ 11.8A), identical 500W rating. | Better clamping ratio but lacks AEC-Q101 option; optimized for commercial industrial use rather than automotive. | Select SMAJ26A for cost-sensitive non-automotive designs requiring tighter clamping; verify PCB pad layout compatibility with SMA footprint. |
| ON Semiconductor 1.5SMC27A | DO-214AB package; higher VWM (27V), wider VBR (30.0–33.0V), same 500W rating; 1.5kW peak pulse rating at 10/1000μs. | Higher power headroom but larger footprint; not AEC-Q101 qualified; intended for general-purpose surge suppression. | Choose 1.5SMC27A where board space allows larger SMC package and higher surge margin is needed; avoid in space-constrained automotive modules. |
Compared with SMAJ26A and 1.5SMC27A, SA26C offers AEC-Q101 qualification in the smaller DO-15 package, making it uniquely suitable for automotive applications requiring both reliability certification and compact through-hole mounting - whereas alternatives trade qualification for clamping precision or surge margin.
Availability
SA26C is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, LED driver power supplies, and telecom power interface protection requiring stable component supply and long-term lifecycle support.
Supply support for SA26C 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, Zener diodes, and MOSFETs for industrial and automotive markets.
The SA Series was developed specifically for high-reliability transient suppression in harsh environments - emphasizing AEC-Q101 compliance, tight parametric tolerances, and robust thermal performance up to +175°C junction temperature.
FAQ
What is the key difference between SA26C and SA26CA?
The SA26C is a unidirectional TVS diode, while SA26CA is its bidirectional counterpart. SA26C features a cathode band and conducts only in reverse breakdown, making it ideal for DC rail protection with polarity awareness. SA26CA has no polarity marking and protects AC or bidirectional signals - but exhibits higher clamping voltage (53.5V vs. 45.4V) and slower response (5ns vs. <1ps). SA26C is preferred for 24V automotive power rails where polarity is fixed and speed is critical.
Does SA26C meet AEC-Q101 qualification?
Yes - the SA26CH variant (H suffix) is explicitly AEC-Q101 qualified per the ordering information table. SA26C itself is the base part number; AEC-Q101 compliance requires ordering SA26CH. The qualification covers temperature cycling, high-temperature reverse bias, and ESD testing per AEC standards, confirming suitability for automotive under-hood applications.
What is the maximum allowable surge current for SA26C at 8.3ms half-sine waveform?
Per Absolute Maximum Ratings, SA26C supports a peak forward surge current (IFSM) of 70A at 8.3ms single half-sine waveform, applicable only to unidirectional types like SA26C. This rating assumes duty cycle ≤4 pulses per minute and is distinct from the 10/1000μs IPPM rating (11A). It validates robustness against inductive switching events such as relay coil de-energization in automotive and industrial controls.
Can SA26C be used in place of SA26A?
No - SA26C and SA26A are distinct variants: SA26C is unidirectional with VBR 28.9–35.3V and VC ≤45.4V, while SA26A is also unidirectional but has tighter VBR (28.9–31.9V) and higher VC (53.5V). Their clamping performance differs significantly; substituting SA26A for SA26C risks exceeding downstream IC voltage ratings. Always match the exact suffix (C vs. A) per design requirements.
What is the junction capacitance of SA26C at 0V and 1MHz?
Junction capacitance is not specified for SA26C in the provided documentation. The SA Series datasheet includes a generic "Fig.4 Typical Junction Capacitance" curve showing values ranging from ~100pF at 0V to ~10pF at VWM for lower-voltage parts, but no numerical value is given for SA26C. For high-frequency signal line protection, consult TSC's application notes or measure directly - SA26C is primarily intended for power rail and low-speed I/O protection, not RF or high-speed data lines.
SA26C 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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 11A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- 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)
SA26C FAQ
1.How can I place an order for SA26C through Aetrix?
Please submit a Request for Quotation (RFQ) for SA26C 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 SA26C reliable?
The price and inventory of SA26C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA26C is usually 5 days.
3.What payment methods are accepted for SA26C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA26C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA26C?
SA26C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA26C 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 SA26C?
For technical support, including SA26C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA26C requirements.
6.How does Aetrix verify that SA26C is sourced from the original manufacturer or authorized distributors?
All SA26C 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 SA26C meets industry standards.
7.What is the process for return or replacement of SA26C?
All SA26C units undergo pre-shipment inspection (PSI). If there is an issue with SA26C, 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 SA26C part is unused and in its original packaging.
Return procedure for SA26C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA26C Tags
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