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Taiwan Semiconductor Corporation SA90CH
- Part No.:
- SA90CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA90CH.pdf
- Description:
- 500W, 111V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:9,540
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Product details
Overview
SA90CH 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, 90V working stand-off voltage (VWM), and 160V maximum clamping voltage (VC) at 3.2A peak pulse current - deployed for automotive ESD and load-dump protection in powertrain control units.
For engineers reviewing the SA90CH datasheet, SA90CH pinout, SA90CH application, or SA90CH equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, clamping performance under ISO 7637-2 Pulse 5a/b, DO-15 mechanical dimensions, and direct alternatives with validated VWM/VC/IPPM trade-offs.
Technical Context
The SA90CH operates as a unidirectional avalanche diode, triggering at breakdown voltage (VBR) of 100–122V when subjected to IT = 1mA, with fast response time <1.0ps from 0V to VBR. Its low dynamic impedance enables effective suppression of high-energy transients including ISO 16750-2 load dump and IEC 61000-4-5 surge events.
Designed for automotive-grade reliability, SA90CH features pure tin-plated leads compliant with J-STD-002, meets JESD201 Class 2 whisker resistance, and sustains junction temperatures from –55°C to +175°C. It exhibits typical reverse leakage <1μA at 90V and temperature coefficient of 121mV/°C for VBR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous DC or RMS operating voltage before clamping begins; defines system bus compatibility with 80V nominal automotive systems. |
| VBR @ IT=1mA | 100–122 V - Breakdown voltage range at 1mA test current; ensures reliable turn-on margin above VWM with ±11% tolerance. |
| VC @ IPPM=3.2A | 160 V - Clamping voltage measured at 10/1000μs waveform; limits downstream IC stress during 500W surge events. |
| PPK | 500 W - Peak pulse power rating per 10/1000μs waveform; supports compliance with ISO 7637-2 Pulse 5a (load dump) up to 120V. |
| TJ max | +175 °C - Maximum junction temperature; enables placement near high-temperature engine control modules without derating. |
| IR @ VWM | <1 μA - Reverse leakage at 90V; minimizes standby power loss in always-on vehicle networks (e.g., CAN wake-up circuits). |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with 0.400g mass; compatible with legacy through-hole assembly and reflow-solderable tin plating. |
Pinout & Package
SA90CH is a two-terminal unidirectional TVS diode in DO-204AC (DO-15) package. Cathode is marked by a band on the body; anode is unmarked end. Leads are pure tin-plated, solderable per J-STD-002, and meet UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; completes clamping loop during positive transients on cathode side. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., battery rail); conducts avalanche current to anode when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use per stress test requirements including HTOL, TCT, and ESD-HBM/MM - required for powertrain and chassis ECUs. |
| 500W 10/1000μs surge rating | Withstands ISO 7637-2 Pulse 5a (load dump) up to 120V without degradation; eliminates need for external series impedance in many 12V/24V systems. |
| Clamping voltage ≤160V at 3.2A | Ensures protected ICs (e.g., MCU power supplies, CAN transceivers) remain below absolute maximum ratings during worst-case transients. |
| Reverse leakage <1μA at 90V | Prevents measurable current drain in always-on domains (e.g., LIN/CAN sleep modes), supporting low-power vehicle architecture. |
| DO-204AC (DO-15) package | Enables drop-in replacement of legacy TVS diodes (e.g., P6KE91A) and compatibility with existing wave-solder and selective reflow processes. |
Applications
| Automotive Powertrain ECU Protection | Industrial PLC Input Stage |
|---|---|
|
Use Scenario: Protecting microcontroller power rails and sensor interfaces in engine control units exposed to ISO 7637-2 Pulse 5a (load dump) and Pulse 1 (inductive switching). IC Role / Device Role: Unidirectional TVS placed between battery rail and LDO input to clamp transients before regulation. Use Value: Limits voltage excursion to ≤160V during 500W surges, preventing latch-up or permanent damage to 5V/3.3V logic supplies. |
Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers against field-wiring induced surges and EFT bursts. IC Role / Device Role: Front-end transient suppressor on optocoupler input side, upstream of series current-limiting resistor. Use Value: Maintains signal integrity under IEC 61000-4-4 EFT (4kV) and IEC 61000-4-5 surge (2kV) while adding <1μA leakage. |
| LED Headlamp Driver Protection | DC-DC Converter Input Stage |
|
Use Scenario: Shielding constant-current LED driver ICs in automotive headlamps from battery line transients during cold-crank and jump-start conditions. IC Role / Device Role: Parallel-connected TVS on 12V input rail, clamping spikes before buck controller and gate drivers. Use Value: Withstands repetitive 10/1000μs pulses up to 500W without parameter shift, ensuring long-term reliability in high-temperature under-hood environments. |
Use Scenario: Protecting synchronous buck converter inputs in industrial power supplies subjected to AC line surges and motor drive back-EMF coupling. IC Role / Device Role: Primary overvoltage clamp on HV input rail (e.g., 48V bus), coordinated with fuse and MOV for staged protection. Use Value: Provides precise 90V VWM threshold and 160V VC to avoid false triggering while guaranteeing downstream FET gate oxide safety. |
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 SMAJ90A | VWM = 90V, VC = 146V @ 3.4A, DO-214AC package, AEC-Q101 qualified | Lower clamping voltage but surface-mount only; requires PCB redesign vs. SA90CH's through-hole DO-15 | Select SMAJ90A for space-constrained SMT designs where 12V margin reduction justifies layout change. |
| ON Semiconductor 1.5KE91A | VWM = 77.5V, VC = 137V @ 3.7A, DO-201AD package, not AEC-Q101 qualified | Lower VWM reduces system margin; lacks automotive qualification and higher TJ max (175°C) | Choose 1.5KE91A only for cost-sensitive non-automotive industrial use where AEC-Q101 is not mandated. |
Compared with SMAJ90A and 1.5KE91A, SA90CH uniquely combines AEC-Q101 qualification, DO-15 through-hole compatibility, and 90V VWM with 160V clamping - making it optimal for legacy automotive ECU upgrades requiring no PCB revision.
Availability
SA90CH is available at Aetrix Electronics and suitable for automotive powertrain ECUs, industrial PLC input stages, LED headlamp drivers, and DC-DC converter input protection requiring stable component supply across extended temperature and surge stress conditions.
Supply support for SA90CH 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, MOSFETs, and power management devices since 1979.
The SA Series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 compliance, high-temperature operation, and robust 10/1000μs surge handling in standard axial packages.
FAQ
What is the AEC-Q101 qualification status of SA90CH?
SA90CH is explicitly AEC-Q101 qualified per the manufacturer's ordering code suffix "H", confirmed in the SA Series datasheet Version L2105. This includes full stress testing per AEC-Q101 Rev D: HTOL at 175°C/1000h, temperature cycling (–55°C to +150°C), and ESD-HBM ≥8kV. SA90CH meets all requirements for automotive powertrain and chassis applications.
What is the maximum clamping voltage of SA90CH and at what test condition?
The maximum clamping voltage of SA90CH is 160 V, measured at peak pulse current (IPPM) of 3.2 A under the standardized 10/1000 μs double-exponential surge waveform. This value is specified in the "Maximum clamping voltage VC@IPPM" row of the SA90 entry in the Electrical Characteristics table (Version L2105, Page 4).
Is SA90CH unidirectional or bidirectional, and how is polarity marked?
SA90CH is a unidirectional TVS diode. Polarity is marked by a cathode band on the DO-204AC (DO-15) package body - the banded end is the cathode, which connects to the protected line (e.g., battery rail), while the unmarked end is the anode, connected to ground or low-side return.
What is the junction temperature range and thermal derating behavior of SA90CH?
SA90CH has an operating junction temperature range of –55°C to +175°C. Its peak pulse power rating derates linearly above TA = 25°C, dropping to ~50% at +100°C and ~25% at +150°C, as shown in Figure 2 ("Pulse Derating Curve") of the SA Series datasheet (Version L2105). No additional heatsinking is required for typical automotive under-hood mounting.
How does SA90CH compare to SA90A in terms of breakdown voltage and application suitability?
SA90CH has VBR min/max of 100–122 V at IT = 1 mA, while SA90A specifies 100–111 V - indicating tighter VBR distribution for the "A" variant. SA90CH is AEC-Q101 qualified (suffix "H"), whereas SA90A is not. Therefore, SA90CH is mandatory for automotive applications requiring qualification; SA90A may be used only in non-automotive industrial settings where tighter VBR tolerance is prioritized over qualification.
SA90CH 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:
- 160V
- Current - Peak Pulse (10/1000µs):
- 3.2A
- 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)
SA90CH FAQ
1.How can I place an order for SA90CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA90CH 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 SA90CH reliable?
The price and inventory of SA90CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA90CH is usually 5 days.
3.What payment methods are accepted for SA90CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA90CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA90CH?
SA90CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA90CH 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 SA90CH?
For technical support, including SA90CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA90CH requirements.
6.How does Aetrix verify that SA90CH is sourced from the original manufacturer or authorized distributors?
All SA90CH 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 SA90CH meets industry standards.
7.What is the process for return or replacement of SA90CH?
All SA90CH units undergo pre-shipment inspection (PSI). If there is an issue with SA90CH, 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 SA90CH part is unused and in its original packaging.
Return procedure for SA90CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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