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Taiwan Semiconductor Corporation SA26CAH
- Part No.:
- SA26CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA26CAH.pdf
- Description:
- TVS DIODE 26VWM 53.5VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,381
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Product details
Overview
SA26CAH from Taiwan Semiconductor is a bidirectional AEC-Q101-qualified transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, with 26V working stand-off voltage (VWM), 28.9–35.3V breakdown voltage (VBR), and 45.4V maximum clamping voltage (VC) at 11.0A peak pulse current - designed for automotive-grade ESD and EFT protection of power rails and signal lines.
For engineers reviewing the SA26CAH datasheet, SA26CAH pinout, SA26CAH application, or SA26CAH equivalent, this device delivers verified bidirectional clamping performance, low leakage (<1μA @ 26V), fast response (<5.0ns), and robust surge immunity per ISO 7637-2 and IEC 61000-4-2/4-4 - critical for CAN/LIN bus interfaces, body control modules, and infotainment power supplies.
Technical Context
The SA26CAH operates as a bidirectional avalanche diode, symmetrically clamping transients above ±28.9V in either polarity while maintaining <1μA reverse leakage at its 26V stand-off rating. Its silicon junction exhibits a temperature coefficient of +31mV/°C for VBR, enabling predictable derating up to TJ = +175°C.
It sustains non-repetitive 10/1000μs surges up to 500W (11.0A IPPM), with clamping voltage tightly bounded at 45.4V - ensuring downstream ICs see sub-46V stress during ISO 7637-2 Pulse 1/2a/5a events. The DO-204AC package supports 70A IFSM for inductive load switching recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous DC or RMS voltage the device blocks without clamping; defines safe operating margin before transient activation. |
| VBR min/max | 28.9 V / 35.3 V @ 1 mA - Verified avalanche onset range; ensures reliable triggering across process and temperature variation. |
| VC @ IPPM | 45.4 V @ 11.0 A - Clamped voltage during 10/1000μs surge; determines maximum stress imposed on protected circuitry. |
| PPK | 500 W - Peak pulse power handling per single 10/1000μs waveform; meets ISO 7637-2 Level III/IV requirements. |
| IR @ VWM | <1 μA - Reverse leakage at rated stand-off; minimizes quiescent power loss and avoids false triggering in high-impedance nodes. |
| TJ max | +175 °C - Maximum junction temperature; enables under-hood deployment in automotive engine control units and lighting drivers. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with UL 94V-0 molding compound and pure tin leads compliant with J-STD-002. |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, molded plastic case with cathode band marking for unidirectional variants; SA26CAH is bidirectional and has no polarity marking - both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity; no orientation required during PCB placement. |
| Lead 1 / Lead 2 | Surge current path | Carries full 11.0A peak pulse current in either direction; leads rated for 70A single half-sine surge (8.3ms). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling, mechanical shock, and humidity testing per stress test standard. |
| 5.0ns bidirectional response | Enables clamping before transient energy couples into sensitive analog or digital inputs - critical for CAN FD and LIN physical layers. |
| 45.4V clamping at 11A | Guarantees protected ICs (e.g., SBCs, transceivers) remain below absolute maximum ratings during ISO 7637-2 Pulse 5a (load dump). |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and automotive ELV directive; supports lead-free reflow and long-term environmental compliance. |
| DO-204AC mechanical robustness | Withstands 10×10 mm copper pad mounting per JEDEC standards; supports 3W steady-state dissipation at TL = 75°C. |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protecting 12V supply rail and switch inputs against load dump and inductive kickback in BCMs. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point before LDOs and microcontrollers. Use Value: Limits transient voltage to ≤45.4V during ISO 7637-2 Pulse 5a (100V/100ms), preventing latch-up or gate oxide damage in downstream PMICs. |
Use Scenario: Shielding 24V digital input channels from EFT bursts and relay contact bounce in industrial PLC backplanes. IC Role / Device Role / Timing Role: Primary front-end surge suppressor on field-side I/O terminals, coordinated with series impedance and filtering. Use Value: Absorbs 500W pulses per IEC 61000-4-4 (EFT) without degradation, maintaining ≤1μA leakage to preserve input threshold accuracy. |
| Automotive Lighting Driver | CAN Transceiver Protection |
|
Use Scenario: Safeguarding LED driver ICs and MOSFET gates from alternator ripple and hot-swap transients in headlamp modules. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed between battery feed and buck controller input, with thermal coupling to heatsink. Use Value: Withstands repeated 70A IFSM surges from inductive lamp loads while maintaining 26V system compatibility. |
Use Scenario: Protecting CANH/CANL pins of transceivers (e.g., TJA1042, SN65HVD230) from ESD and bus faults. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp mounted adjacent to transceiver pins, minimizing stub length. Use Value: Responds in <5.0ns to IEC 61000-4-2 ±8kV contact discharge, clamping to 45.4V without affecting CAN signal integrity (bit rate ≤1Mbps). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26CA | Same VWM (26V), but lower PPK (400W); DO-214AC (SMA) package; 38.9V VC @ 10.3A. | Limited to non-automotive industrial use due to lack of AEC-Q101 qualification; smaller footprint but lower surge margin. | Select SMAJ26CA only if board space is constrained and 400W surge rating suffices for IEC 61000-4-5 Level 3. |
| 1.5KE27CA | Higher VWM (27V), same DO-204AC package; 500W rating; 45.7V VC @ 10.9A; no AEC-Q101 documentation. | Acceptable for commercial/industrial environments but not validated for automotive temperature cycling or vibration stress. | Choose 1.5KE27CA when AEC-Q101 is not required and VWM tolerance allows 27V vs. SA26CAH's 26V. |
Compared with SMAJ26CA and 1.5KE27CA, SA26CAH uniquely combines AEC-Q101 qualification, precise 26V VWM, and guaranteed 45.4V clamping - making it the only option qualified for direct integration into ASIL-B-relevant automotive subsystems without additional validation overhead.
Availability
SA26CAH is available at Aetrix Electronics and suitable for automotive electronics, industrial PLC I/O protection, and CAN/LIN bus interface designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-compliant surge immunity.
Supply support for SA26CAH 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 automotive-qualified components since 1979.
The SA Series was developed specifically for AEC-Q101-compliant transient suppression in automotive power distribution, lighting, and communication systems - emphasizing robustness, tight parameter distribution, and high-temperature reliability.
FAQ
What does the 'H' suffix in SA26CAH signify?
The 'H' suffix in SA26CAH explicitly denotes AEC-Q101 qualification per the manufacturer's ordering code specification. This means SA26CAH has undergone full automotive stress testing - including temperature cycling, mechanical shock, and high-temperature operating life - and is approved for use in automotive electronic control units, body modules, and lighting systems where reliability under harsh conditions is mandatory.
Is SA26CAH unidirectional or bidirectional, and how is polarity identified?
SA26CAH is a bidirectional TVS diode, as indicated by the 'CA' suffix (C = bidirectional, A = AEC-Q101). Unlike unidirectional SA26A variants, SA26CAH has no cathode band or polarity marking - both terminals are electrically identical and symmetrical. This enables simplified layout with no orientation constraints during assembly.
What is the maximum clamping voltage of SA26CAH under standardized surge conditions?
The maximum clamping voltage of SA26CAH is 45.4 V at 11.0 A peak pulse current (IPPM), measured under the 10/1000μs double-exponential waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range and ensures protected circuits remain within safe voltage limits during load dump and EFT events.
Can SA26CAH replace SA26A in an existing design?
No - SA26CAH cannot directly replace SA26A because they differ fundamentally in functionality: SA26A is unidirectional (anode/cathode asymmetry), while SA26CAH is bidirectional (symmetrical). Substituting SA26CAH for SA26A may compromise protection in DC-biased circuits where polarity-specific clamping is required, such as 12V rail-to-ground protection.
What packaging options are available for SA26CAH?
SA26CAH is supplied in tape-and-reel format: 3,500 units per reel (ordering code SA26CAH). It is not offered in ammo pack or bulk formats. The DO-204AC (DO-15) package uses pure tin-plated leads compliant with J-STD-002 for lead-free soldering, and the reel packaging meets ESD-safe handling requirements per ANSI/ESD S20.20.
SA26CAH 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:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- 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)
SA26CAH FAQ
1.How can I place an order for SA26CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA26CAH 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 SA26CAH reliable?
The price and inventory of SA26CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA26CAH is usually 5 days.
3.What payment methods are accepted for SA26CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA26CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA26CAH?
SA26CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA26CAH 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 SA26CAH?
For technical support, including SA26CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA26CAH requirements.
6.How does Aetrix verify that SA26CAH is sourced from the original manufacturer or authorized distributors?
All SA26CAH 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 SA26CAH meets industry standards.
7.What is the process for return or replacement of SA26CAH?
All SA26CAH units undergo pre-shipment inspection (PSI). If there is an issue with SA26CAH, 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 SA26CAH part is unused and in its original packaging.
Return procedure for SA26CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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