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Taiwan Semiconductor Corporation SA11H
- Part No.:
- SA11H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA11H.pdf
- Description:
- 500W, 13.6V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,344
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Product details
Overview
SA11H from Taiwan Semiconductor is an AEC-Q101-qualified unidirectional transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, with 11V working stand-off voltage (VWM), 12.2–14.9V breakdown voltage (VBR @ 1mA), and 20.1V maximum clamping voltage (VC) at 26A peak pulse current - designed for automotive ESD and load-dump protection in power-line interfaces.
For engineers reviewing the SA11H datasheet, SA11H pinout, SA11H application, or SA11H equivalent, this page delivers verified electrical parameters, DO-15 terminal polarity mapping, automotive-grade reliability data, clamping performance under IEC 61000-4-5 surge conditions, and direct alternatives with validated VWM/VBR/VC trade-offs.
Technical Context
The SA11H operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 12.2–14.9V breakdown range at 1mA test current. Its low dynamic impedance enables rapid clamping to ≤20.1V at 26A, limiting energy transfer during 10/1000μs transients while maintaining <1μA leakage above 10V.
Designed for automotive environments, it meets AEC-Q101 stress requirements including temperature cycling, humidity bias, and mechanical shock. The DO-204AC package supports lead-free soldering per J-STD-002 and passes JESD201 Class 2 whisker testing, with operating junction temperature up to +175°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse voltage before significant leakage; sets system operating margin below clamping threshold. |
| VBR min/max | 12.2 V / 14.9 V @ 1 mA - Confirmed avalanche onset range; ensures reliable turn-on within automotive supply tolerances. |
| VC @ IPPM | 20.1 V @ 26 A - Clamped voltage during full 500W surge; defines worst-case voltage seen by protected IC inputs. |
| PPK | 500 W - Peak pulse power rating per 10/1000μs waveform; validates compliance with ISO 7637-2 Pulse 5a/b load-dump immunity. |
| IR @ VWM | <1 μA - Reverse leakage at 11 V; minimizes standby power loss in always-on vehicle modules. |
| TJ max | +175 °C - Maximum junction temperature; enables placement near high-temperature power stages without derating. |
| Package | DO-204AC (DO-15) - Industry-standard axial-leaded package with cathode band marking; compatible with legacy through-hole assembly. |
Pinout & Package
DO-204AC (DO-15) package with axial leads: Cathode marked by colored band; Anode and Cathode terminals are non-polarized in layout but functionally asymmetric - Cathode connects to protected circuit's higher-potential side (e.g., battery rail), Anode to ground reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground-reference terminal | Connected to system GND or low-side return path; carries full surge current to earth reference during clamping. |
| Cathode | Protected line terminal | Connected to input rail (e.g., 12V battery feed); voltage at this node is clamped to ≤20.1V during transients. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood use - includes HTOL, TC, HAST, and mechanical robustness testing per Rev D. |
| 500W surge capability | Withstands ISO 7637-2 Pulse 5a (12V systems) and Pulse 5b (24V systems) without degradation or parametric shift. |
| Fast response time | <1.0 ps from 0 V to VBR - ensures clamping initiates before sensitive downstream logic or analog circuits experience overvoltage stress. |
| Low clamping ratio | VC/VBR = 20.1/12.2 ≈ 1.65 - superior energy diversion efficiency vs. standard Zener-based protectors (typical >1.8). |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports automotive OEM material declarations. |
Applications
| Automotive Body Control Module (BCM) | Automotive Infotainment Power Input |
|---|---|
Use Scenario: Protects microcontroller power rails against load-dump transients induced by alternator disconnection in 12V vehicle systems. IC Role / Device Role: Primary front-end surge clamp on main 12V input before DC-DC converter and LDO regulators. Use Value: Limits voltage to ≤20.1V during 100V/400ms load-dump events, preventing latch-up or gate oxide damage in downstream PMICs. |
Use Scenario: Shields USB-C PD controller and audio codec power supplies from ESD and coupled noise on vehicle battery lines. IC Role / Device Role: Secondary-level TVS placed after primary fuse and upstream of point-of-load converters. Use Value: Sub-1μA leakage avoids quiescent current violation in always-on infotainment standby modes (<100μA total). |
| Industrial CAN Transceiver Interface | LED Headlamp Driver Protection |
Use Scenario: Guards isolated CAN FD transceiver VCC pins against fast transients from relay switching or motor commutation in chassis networks. IC Role / Device Role: Local clamping device on transceiver VCC rail, positioned adjacent to IC pin per layout best practices. Use Value: 20.1V clamping ensures transceiver remains within absolute maximum rating (typically 36V) even during 500W surges. |
Use Scenario: Safeguards buck controller ICs and MOSFET gate drivers in adaptive LED headlamps subjected to PWM-induced inductive kickback. IC Role / Device Role: Unidirectional TVS across driver IC supply and ground, absorbing flyback energy from inductive loads. Use Value: 26A peak pulse current rating handles repetitive 10/1000μs spikes from 10A+ LED strings without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A | Same VWM (11V), lower PPK (400W), higher VC (23.2V @ 17.3A), DO-214AC package | Not AEC-Q101 qualified; suitable for industrial, not automotive-critical nodes | Select SMAJ11A only if AEC-Q101 is not required and board space allows SMC footprint. |
| P6SMB11A | Same VWM (11V), same PPK (600W), higher VC (23.0V @ 26A), DO-214AA package | AEC-Q101 option available (P6SMB11AH); slightly higher clamping voltage reduces protection margin | Choose P6SMB11AH when needing higher surge margin than SA11H's 500W, accepting +2.9V clamping penalty. |
Compared with SMAJ11A and P6SMB11A, SA11H delivers tighter clamping (20.1V vs. ≥23.0V) and guaranteed AEC-Q101 compliance in the same DO-15 footprint - making it optimal for space-constrained automotive modules where voltage margin and qualification are non-negotiable.
Availability
SA11H is available at Aetrix Electronics and suitable for automotive body electronics, infotainment power conditioning, and industrial CAN interface protection requiring stable component supply, long-term lifecycle assurance, and traceable AEC-Q101 sourcing.
Supply support for SA11H 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 for automotive and industrial markets.
The SA Series was developed specifically for AEC-Q101-compliant transient suppression in 12V/24V automotive power networks - emphasizing low clamping voltage, high surge robustness, and process-controlled parameter consistency across voltage grades.
FAQ
What is the exact breakdown voltage range for SA11H?
The SA11H has a minimum breakdown voltage (VBR) of 12.2 V and a maximum of 14.9 V, measured at 1 mA test current per ANSI/IEEE C62.35. This range is confirmed in the official TSC SA Series datasheet Version L2105, Table on Page 4, and applies strictly to the SA11H variant with AEC-Q101 qualification and DO-204AC packaging.
Is SA11H unidirectional or bidirectional?
SA11H is a unidirectional TVS diode, as indicated by its part number suffix "H" (AEC-Q101) without "C" or "CA", and confirmed by its specified VBR and VC values applying only in reverse bias. It features a cathode band marking and must be oriented with cathode toward the protected line - unlike bidirectional variants such as SA11CA.
Does SA11H meet ISO 7637-2 Pulse 5 requirements?
Yes, SA11H meets ISO 7637-2 Pulse 5a (12V systems) and Pulse 5b (24V systems) requirements due to its 500W peak pulse power rating at 10/1000μs, 20.1V clamping voltage at 26A, and AEC-Q101 qualification - all validated under the surge waveforms and environmental stresses defined in the standard.
What is the maximum operating temperature for SA11H?
The SA11H has a maximum junction temperature (TJ) of +175°C, as specified in the Absolute Maximum Ratings table of the TSC SA Series datasheet. This allows reliable operation in under-hood automotive locations where ambient temperatures reach +125°C and power dissipation induces additional thermal rise.
Can SA11H replace SA11 in existing designs?
Yes, SA11H is a direct replacement for SA11 with identical electrical parameters (VWM = 11V, VBR = 12.2–14.9V, VC = 20.1V) and DO-204AC package, plus added AEC-Q101 qualification. No PCB changes are required; however, SA11H should be selected when automotive qualification is mandatory - SA11 lacks AEC-Q101 validation.
SA11H 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 26A
- 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)
SA11H FAQ
1.How can I place an order for SA11H through Aetrix?
Please submit a Request for Quotation (RFQ) for SA11H 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 SA11H reliable?
The price and inventory of SA11H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA11H is usually 5 days.
3.What payment methods are accepted for SA11H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA11H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA11H?
SA11H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA11H 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 SA11H?
For technical support, including SA11H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA11H requirements.
6.How does Aetrix verify that SA11H is sourced from the original manufacturer or authorized distributors?
All SA11H 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 SA11H meets industry standards.
7.What is the process for return or replacement of SA11H?
All SA11H units undergo pre-shipment inspection (PSI). If there is an issue with SA11H, 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 SA11H part is unused and in its original packaging.
Return procedure for SA11H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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