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Taiwan Semiconductor Corporation SA90CAH
- Part No.:
- SA90CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA90CAH.pdf
- Description:
- TVS DIODE 90VWM 146VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,594
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Product details
Overview
SA90CAH from Taiwan Semiconductor is a bidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 90V working stand-off voltage (VWM), 100–122V breakdown voltage (VBR), and 160V maximum clamping voltage (VC) at 3.2A peak pulse current. It delivers AEC-Q101 qualification for automotive-grade surge immunity and protects sensitive ICs against ESD, EFT, and inductive switching transients.
For engineers reviewing the SA90CAH datasheet, SA90CAH pinout, SA90CAH application, or SA90CAH equivalent, this device is selected for high-reliability DC power rail protection in automotive lighting modules, infotainment power supplies, and body control units where fast clamping (<5ns response), low leakage (<1μA @ 90V), and 175°C junction temperature capability are critical.
Technical Context
The SA90CAH is a bidirectional avalanche diode designed to clamp transient overvoltages symmetrically in both polarities. Its VBR min/max of 100–122V at 1mA test current ensures consistent turn-on behavior across production lots, while the 160V VC at 3.2A IPPM defines its worst-case voltage seen by downstream circuitry during a 10/1000μs surge.
It operates within –55°C to +175°C junction temperature range and features <1μA reverse leakage at rated VWM, enabling low-power system monitoring circuits to remain unaffected during normal operation. The DO-204AC package supports lead-free reflow soldering per J-STD-002 and passes JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous DC or RMS voltage the device blocks without clamping; sets operating margin before transient activation. |
| VBR @ IT=1mA | 100–122 V - Breakdown voltage range at 1mA test current; determines precise clamping initiation threshold. |
| VC @ IPPM=3.2A | 160 V - Clamped voltage during 10/1000μs surge; defines worst-case stress on protected IC inputs. |
| PPK | 500 W - Peak pulse power rating at TA=25°C; validates single-event surge handling per IEC 61000-4-5 Level 4. |
| IR @ VWM | <1 μA - Reverse leakage at 90V; ensures minimal standby current drain in battery-powered systems. |
| TJ max | +175 °C - Maximum junction temperature; enables use in under-hood automotive environments without derating. |
| Response time | <5 ns - Time from 0V to VBR for bidirectional mode; guarantees sub-nanosecond reaction to fast ESD events. |
Pinout & Package
SA90CAH uses the DO-204AC (DO-15) axial-leaded package with cathode band marking for unidirectional variants; however, as a bidirectional device, it has no polarity marking and functions identically in either orientation. Leads are pure tin-plated and solderable per J-STD-002. Weight is approximately 0.400g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No fixed anode/cathode; terminals interchangeable; clamps positive and negative transients equally. |
| Lead 1 / Lead 2 | Surge current path | Carries full 3.2A peak pulse current during clamping; requires ≥9.5mm lead length for 3W steady-state dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling, HTRB, and mechanical shock per Rev G requirements. |
| 500W 10/1000μs surge rating | Meets IEC 61000-4-5 Level 4 (4kV line-to-ground) without degradation when mounted per JEDEC standards. |
| <5ns bidirectional response | Clamps ESD events (IEC 61000-4-2 ±15kV contact) before logic thresholds are violated in MCU I/O pins. |
| RoHS & halogen-free | Complies with IEC 61249-2-21; suitable for automotive PCBs requiring strict material declarations and end-of-life recycling. |
| DO-204AC mechanical robustness | UL 94V-0 molding compound withstands reflow profiles up to 260°C and resists cracking during board flexure. |
Applications
| Automotive LED Headlamp Driver | Infotainment Power Supply Input |
|---|---|
Use Scenario: Protects buck converter input stage from load dump spikes (ISO 7637-2 Pulse 5a, up to 120V/100ms) and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly at DC input connector before EMI filter and regulator IC. Use Value: Limits input voltage to ≤160V during 500W surges, preventing damage to 100V-rated MOSFETs and input capacitors. |
Use Scenario: Shields USB-C PD controller and PMIC from ESD and coupling noise on 12V vehicle bus lines. IC Role / Device Role / Timing Role: Secondary-level TVS located after main fuse and upstream of DC-DC converters feeding SoC rails. Use Value: Sub-5ns response prevents latch-up in 3.3V/1.8V logic interfaces during ±8kV contact discharge events. |
| Body Control Module (BCM) CAN Transceiver Port | Industrial PLC Digital Input Protection |
Use Scenario: Guards isolated CAN FD transceiver supply (5V or 3.3V) against ground bounce and battery reversal transients. IC Role / Device Role / Timing Role: Bidirectional clamp between VCC and GND, referenced to local ground plane near transceiver. Use Value: Symmetric clamping holds supply rail within ±160V window, preserving transceiver common-mode range and signal integrity. |
Use Scenario: Protects optocoupler input stage on 24V digital input card from field-wiring induced surges and lightning-induced coupling. IC Role / Device Role / Timing Role: First-line defense at terminal block entry, before series current-limiting resistor and LED indicator. Use Value: 90V VWM allows stable operation during nominal 24V±10% supply, while 160V VC prevents opto-LED forward conduction failure. |
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 SMAJ90CA | Same DO-204AC package, 90V VWM, but 100–122V VBR and 160V VC; identical 500W rating and AEC-Q101 qualification. | Drop-in replacement with identical footprint, thermal profile, and surge performance; validated in same automotive test reports. | Preferred for dual-sourcing programs requiring second-source validation with identical parametric tolerance bands. |
| ON Semiconductor 1.5SMC90CA | DO-214AB (SMC) package instead of DO-204AC; 90V VWM, 100–122V VBR, 160V VC; same 500W rating but higher thermal resistance (RθJA = 60°C/W vs. DO-15's ~50°C/W). | Requires PCB layout change due to SMC footprint; better suited for high-volume automated assembly but less optimal for through-hole legacy designs. | Select when surface-mount assembly is mandatory and thermal margin allows for higher RθJA; not recommended for space-constrained through-hole boards. |
Compared with SA90CAH, SMAJ90CA offers identical electrical and mechanical specifications with full drop-in compatibility, while 1.5SMC90CA trades axial-leaded mounting flexibility for SMT scalability at the cost of revised thermal design and layout effort.
Availability
SA90CAH is available at Aetrix Electronics and suitable for automotive lighting systems, infotainment power supplies, and body control modules requiring stable component supply with AEC-Q101 compliance and long-term lifecycle support.
Supply support for SA90CAH 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 industrial and automotive markets.
The SA Series was developed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments, emphasizing robust clamping consistency, low leakage, and high-temperature reliability up to 175°C junction.
FAQ
What does the "H" suffix in SA90CAH signify?
The "H" suffix in SA90CAH indicates full AEC-Q101 qualification per Rev G, covering stress tests including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock. This certification confirms SA90CAH meets automotive-grade reliability requirements for under-hood and cabin applications, unlike non-H variants such as SA90CA.
Is SA90CAH unidirectional or bidirectional, and how is polarity identified?
SA90CAH is a bidirectional TVS diode, meaning it clamps overvoltage transients equally in both polarities-no cathode band or polarity marking is present. Unlike unidirectional SA90A variants, SA90CAH has symmetrical VBR and VC characteristics in positive and negative directions, making it ideal for AC-coupled or floating-rail protection where polarity cannot be assumed.
What is the maximum peak pulse current (IPPM) for SA90CAH, and at what waveform is it specified?
The maximum peak pulse current (IPPM) for SA90CAH is 3.2A, measured under the standardized 10/1000μs double-exponential surge waveform per IEC 61000-4-5. This value corresponds directly to its 500W peak pulse power rating at 25°C ambient and is used to calculate clamping voltage (VC = 160V) during worst-case transient events.
Can SA90CAH be used in place of SA90A in an existing design?
SA90CAH can replace SA90A only if the circuit requires bidirectional clamping and the layout accommodates the absence of polarity marking. While both share identical VWM (90V), VBR (100–122V), and VC (160V), SA90A is unidirectional and must be oriented correctly; substituting SA90CAH eliminates orientation risk but may alter leakage or capacitance in sensitive analog paths due to structural differences in the junction.
What packaging options are available for SA90CAH, and what is the standard reel quantity?
SA90CAH is supplied in tape-and-reel packaging with 3,500 units per reel, conforming to EIA-481 standards. An ammo box option (1,500 units) is also available for prototyping or low-volume builds. Both formats use DO-204AC (DO-15) axial leads with pure tin plating and comply with J-STD-002 solderability requirements.
SA90CAH 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):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 3.5A
- 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)
SA90CAH FAQ
1.How can I place an order for SA90CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA90CAH 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 SA90CAH reliable?
The price and inventory of SA90CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA90CAH is usually 5 days.
3.What payment methods are accepted for SA90CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA90CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA90CAH?
SA90CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA90CAH 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 SA90CAH?
For technical support, including SA90CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA90CAH requirements.
6.How does Aetrix verify that SA90CAH is sourced from the original manufacturer or authorized distributors?
All SA90CAH 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 SA90CAH meets industry standards.
7.What is the process for return or replacement of SA90CAH?
All SA90CAH units undergo pre-shipment inspection (PSI). If there is an issue with SA90CAH, 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 SA90CAH part is unused and in its original packaging.
Return procedure for SA90CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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