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Taiwan Semiconductor Corporation SA22H
- Part No.:
- SA22H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA22H.pdf
- Description:
- 500W, 27.1V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,597
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Product details
Overview
SA22H from Taiwan Semiconductor is a unidirectional AEC-Q101-qualified transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, 22V working stand-off voltage (VWM), and 24.4–29.8V breakdown voltage (VBR) at 1mA test current. It delivers 13.0A peak pulse current (IPPM) with 38.9V clamping voltage (VC) and operates from –55°C to +175°C junction temperature - deployed in automotive power line surge protection.
For engineers reviewing the SA22H datasheet, SA22H pinout, SA22H application, or SA22H equivalent, this page provides verified electrical parameters, AEC-Q101 qualification status, clamping performance under 10/1000μs transients, thermal derating behavior, and direct alternatives for automotive-grade ESD/EFT protection in 12V/24V systems.
Technical Context
The SA22H is a silicon avalanche diode designed for unidirectional transient suppression, leveraging controlled avalanche breakdown to clamp overvoltage events. Its VBR range (24.4–29.8V) ensures reliable triggering above 22V nominal system voltage while maintaining low leakage (<1μA at VWM).
It exhibits fast response time (<1.0ps from 0V to VBR), low dynamic impedance, and stable clamping up to 500W per 10/1000μs waveform. Thermal performance is validated to TJ(max) = 175°C with derating curves defined for ambient and lead temperature conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level DC margin for 12V/24V automotive rails. |
| VBR @ IT=1mA | 24.4–29.8 V - Breakdown voltage range defining reliable turn-on threshold; ensures consistent clamping across production lot. |
| VC @ IPPM=13.0A | 38.9 V - Clamping voltage during 500W 10/1000μs surge; limits downstream IC stress below 40V in protected circuits. |
| PPK | 500 W - Peak pulse power rating per single non-repetitive 10/1000μs waveform; meets ISO 7637-2 Pulse 1/2/5a requirements. |
| IR @ VWM | <1 μA - Reverse leakage current at 22V; minimizes standby power loss and avoids false triggering in high-impedance sensing nodes. |
| TJ(max) | +175 °C - Maximum junction temperature; supports under-hood placement in engine control units and body electronics. |
| Package | DO-204AC (DO-15) - Industry-standard axial-leaded package with tin-plated leads compliant to J-STD-002; enables manual or wave soldering. |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking polarity. 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 | Low-side reference terminal | Connected to ground or low-voltage return path; defines reference for unidirectional clamping action toward cathode. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., battery rail); avalanche conduction occurs from cathode to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling, HTRB, and surge endurance per stress test plan. |
| 500W 10/1000μs surge capability | Withstands ISO 7637-2 Pulse 5a (load dump) without degradation when mounted per JEDEC standards. |
| <1.0ps response time | Clamps transients before sensitive logic or analog circuitry experiences damaging overvoltage - critical for CAN/LIN bus protection. |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; suitable for Tier 1 automotive supply chain traceability. |
| 175°C maximum junction temperature | Enables placement near heat sources (e.g., power relays, motor drivers) without thermal derating penalties in engine bay modules. |
Applications
| Automotive Power Line Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs against load dump and jump-start surges per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients before DC/DC converter stage. Use Value: Limits peak voltage to ≤38.9V during 500W surges, preventing damage to 40V-rated input MOSFETs and LDO regulators. |
Use Scenario: Shielding high-speed CAN FD transceivers from ESD and EFT events on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS connected between CAN_H and ground to absorb common-mode transients without signal distortion. Use Value: Sub-1ps response ensures clamping initiates before CAN bit timing window (≥5ns), preserving data integrity at 5 Mbps. |
| Body Control Module Inputs | LED Lighting Driver Protection |
Use Scenario: Safeguarding microcontroller GPIOs and sensor inputs in door modules exposed to cable discharge events. IC Role / Device Role / Timing Role: Point-of-entry TVS on switch inputs and LIN bus lines to shunt ESD pulses to chassis ground. Use Value: <1μA leakage at 22V prevents false wake-up in low-power sleep modes; AEC-Q101 qualification ensures reliability over 15-year vehicle life. |
Use Scenario: Protecting constant-current LED drivers in headlamp assemblies from inductive kickback during PWM dimming. IC Role / Device Role / Timing Role: TVS placed across driver output terminals to clamp flyback voltage spikes generated by LED string inductance. Use Value: 38.9V clamping voltage stays below 45V absolute max rating of typical automotive LED drivers, avoiding latch-up or overvoltage shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Unidirectional, 22V VWM, 35.5V VC @ 14A, DO-214AC (SMA) package, no AEC-Q101 listing. | Surface-mount alternative with higher thermal resistance; requires PCB layout change and lacks automotive qualification evidence. | Select SMAJ22A only for cost-sensitive non-automotive industrial designs where AEC-Q101 is not mandated. |
| P6SMB22AH | Unidirectional, 22V VWM, 35.5V VC @ 14A, DO-214AA (SMB) package, AEC-Q101 qualified per ON Semi documentation. | Same qualification level but larger SMB footprint; slightly lower IPPM (14A vs. 13.0A) and identical clamping performance. | Choose P6SMB22AH when existing board design uses SMB pads or when higher surge margin is needed via parallel placement. |
Compared with SA22H, SMAJ22A offers surface-mount convenience but lacks automotive qualification and has inferior thermal performance in axial-leaded systems, while P6SMB22AH matches AEC-Q101 compliance and clamping but requires different PCB land pattern and delivers marginally higher surge current handling.
Availability
SA22H is available at Aetrix Electronics and suitable for automotive ECU protection, CAN bus interface hardening, and LED lighting driver surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SA22H 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, and rectifiers, with global distribution and AEC-Q101 validation capabilities.
The SA Series is engineered specifically for automotive-grade transient suppression, targeting ISO 7637-2 and ISO 10605 compliance in 12V/24V vehicle networks - emphasizing robustness, low leakage, and high-temperature operation.
FAQ
What is the AEC-Q101 qualification status of SA22H?
The SA22H is explicitly AEC-Q101 qualified per Taiwan Semiconductor's ordering code nomenclature ("H" suffix) and product documentation. This includes full stress testing per AEC-Q101 Rev D: HTGB, HTRB, TCT, AC/DC life test, and surge endurance. SA22H is certified for use in automotive powertrain and body electronics where reliability over 15 years and 175°C operation are required.
Does SA22H support bidirectional transient suppression?
No, SA22H is a unidirectional TVS diode - it clamps only when cathode voltage exceeds anode voltage by ≥24.4V. Bidirectional operation requires SA22AH (with "A" suffix), which features symmetrical breakdown in both polarities. Using SA22H in bidirectional applications risks failure during negative transients, as its anode-to-cathode forward voltage is ~3.5V, not a clamping threshold.
What is the maximum clamping voltage of SA22H under standard test conditions?
The maximum clamping voltage (VC) of SA22H is 38.9V at 13.0A peak pulse current (IPPM), measured per 10/1000μs waveform per IEC 61000-4-5 and ANSI/IEEE C62.35. This value is guaranteed across temperature (–55°C to +175°C) and represents worst-case voltage seen by downstream components during a 500W transient event.
How does SA22H compare to SA22A in terms of breakdown voltage tolerance?
SA22H has a VBR range of 24.4–29.8V at 1mA, while SA22A (bidirectional variant) specifies 24.4–26.9V - a tighter 10% tolerance versus SA22H's ~22% spread. This reflects different process binning: SA22H prioritizes surge robustness and automotive qualification, whereas SA22A targets precision clamping symmetry for bidirectional signal lines like USB or RS-485.
Is SA22H compatible with lead-free reflow soldering processes?
Yes, SA22H uses pure tin-plated leads compliant with J-STD-002 and rated for lead-free reflow profiles up to 260°C peak temperature. The DO-204AC (DO-15) package withstands standard IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) 1 conditions, requiring no baking prior to assembly. Its UL 94V-0 molding compound ensures flame resistance during soldering.
SA22H 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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 13A
- 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)
SA22H FAQ
1.How can I place an order for SA22H through Aetrix?
Please submit a Request for Quotation (RFQ) for SA22H 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 SA22H reliable?
The price and inventory of SA22H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA22H is usually 5 days.
3.What payment methods are accepted for SA22H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA22H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA22H?
SA22H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA22H 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 SA22H?
For technical support, including SA22H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA22H requirements.
6.How does Aetrix verify that SA22H is sourced from the original manufacturer or authorized distributors?
All SA22H 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 SA22H meets industry standards.
7.What is the process for return or replacement of SA22H?
All SA22H units undergo pre-shipment inspection (PSI). If there is an issue with SA22H, 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 SA22H part is unused and in its original packaging.
Return procedure for SA22H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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