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Taiwan Semiconductor Corporation SA90H
- Part No.:
- SA90H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA90H.pdf
- Description:
- 500W, 111V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,200
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Product details
Overview
SA90H from Taiwan Semiconductor is a unidirectional 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 in power supply and interface protection circuits.
For engineers reviewing the SA90H datasheet, SA90H pinout, SA90H application, or SA90H equivalent, key selection criteria include its 90V VWM rating, 160V clamping performance under 10/1000μs surge, AEC-Q101 qualification status, DO-15 mechanical compatibility, and low leakage (<1μA @ 90V) for low-power system standby integrity.
Technical Context
The SA90H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 100–122V breakdown range at 1mA test current. Its clamping action limits transients to ≤160V at 3.2A (10/1000μs), enabling robust protection of downstream 90V-rated circuitry such as automotive DC-DC controllers or industrial I/O drivers.
Designed for non-repetitive surge suppression, it features a junction temperature limit of 175°C, thermal derating per Fig.2, and meets JESD201 Class 2 whisker resistance. Polarity is marked by cathode band; leads are pure tin-plated and solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before conduction begins; defines safe standoff for 90V rail protection. |
| VBR min/max | 100–122 V @ 1 mA - Breakdown threshold range; ensures reliable turn-on above system nominal voltage with margin. |
| VC @ IPPM | 160 V @ 3.2 A - Clamped voltage during 10/1000μs surge; determines worst-case stress on protected IC inputs. |
| PPK | 500 W - Peak pulse power handling capability; supports high-energy EFT and load-dump transients. |
| IR @ VWM | <1 μA - Reverse leakage at 90V; preserves low quiescent current in always-on automotive modules. |
| TJ max | +175 °C - Maximum junction temperature; enables operation in under-hood environments without thermal shutdown. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package; compatible with legacy through-hole PCB layouts and automated tape-and-reel assembly (3500/reel). |
Pinout & Package
DO-204AC (DO-15) package with axial leads: Cathode indicated by band-marked end; Anode is unmarked lead. Leads are pure tin-plated, solderable per J-STD-002, and meet UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked lead) | Forward current entry / reverse surge return path | Connected to system ground or low-impedance return node; completes clamping loop during transient events. |
| Cathode (banded lead) | Reverse-biased terminal / surge input node | Connected to protected line (e.g., 90V supply rail); conducts avalanche current when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring extended temperature and reliability compliance. |
| 500W 10/1000μs surge rating | Withstands high-energy load dump and ISO 7637-2 Pulse 5a/b transients without degradation in automotive 24V systems. |
| Clamping voltage ≤160V @ 3.2A | Ensures protected 90V logic or analog circuits remain below absolute maximum ratings during worst-case surge conditions. |
| Leakage <1μA @ 90V | Minimizes standby power loss in always-on vehicle modules such as CAN gateways and telematics units. |
| DO-204AC (DO-15) package | Enables drop-in replacement of legacy TVS diodes and supports manual rework or wave soldering in mixed-technology assemblies. |
Applications
| Automotive Power Rail Protection | Industrial DC-DC Input Stage |
|---|---|
Use Scenario: Protecting 90V battery-fed DC-DC converters in commercial vehicle infotainment systems against load dump surges up to 120V. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between input rail and ground to shunt surge energy before reaching regulator IC. Use Value: Limits transient voltage to ≤160V, preventing overvoltage failure of 100V-input buck controllers while maintaining <1μA leakage during sleep mode. | Use Scenario: Safeguarding programmable logic controller (PLC) 90V auxiliary power inputs from inductive switching transients generated by solenoid drivers. IC Role / Device Role / Timing Role: Standoff protector on primary side of isolated DC-DC stage; activated only during >100V spikes. Use Value: Withstands 500W pulses without degradation, ensuring long-term reliability in factory automation environments with frequent relay switching. |
| LED Driver Overvoltage Clamp | Telecom Line Interface Protection |
Use Scenario: Clamping voltage excursions on constant-current LED driver outputs in outdoor signage exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Parallel-connected unidirectional TVS across output terminals to clamp reverse polarity or overshoot events. Use Value: 160V clamping voltage prevents damage to 120V-rated LED strings while leakage remains negligible during normal 90V operation. | Use Scenario: Protecting RS-485 transceiver power rails in telecom base station remote units subjected to electrical fast transients (EFT) per IEC 61000-4-4. IC Role / Device Role / Timing Role: Primary-level surge limiter on +90V bias rail feeding isolated data interface circuitry. Use Value: Fast response (<1ps) and low clamping ensure signal integrity is preserved and transceiver ICs avoid latch-up during 5kHz burst EFT events. |
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 | Same DO-214AC package; 90V VWM, 100–122V VBR, but 163V VC @ 3.2A and 1μA IR - slightly higher clamping and identical leakage. | Not AEC-Q101 qualified; rated for commercial/industrial use only. | Select SMAJ90A only if AEC-Q101 compliance is not required and DO-214AC surface-mount layout is preferred. |
| ON Semiconductor 1.5KE91A | Higher PPK (1500W), larger DO-201AD package, 91V VWM, 101–112V VBR, 150V VC @ 10A - greater surge capacity but higher capacitance and no AEC-Q101 validation. | Designed for general-purpose surge suppression; lacks automotive qualification and has different thermal profile. | Choose 1.5KE91A where higher single-pulse energy tolerance is needed and board space allows larger axial package. |
Compared with SMAJ90A and 1.5KE91A, SA90H uniquely combines AEC-Q101 qualification, DO-15 through-hole compatibility, and precise 90V/160V clamping behavior-making it the preferred choice for automotive 90V rail protection where qualification and legacy footprint retention are mandatory.
Availability
SA90H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial DC-DC input stages, and LED driver overvoltage clamp applications requiring stable component supply and long-term lifecycle support.
Supply support for SA90H 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 MOSFETs for automotive, industrial, and consumer markets.
The SA Series is designed specifically for high-reliability transient suppression in harsh environments, with AEC-Q101 variants like SA90H targeting automotive subsystems requiring validated surge immunity and thermal robustness.
FAQ
What is the clamping voltage of SA90H under standard 10/1000μs surge conditions?
The SA90H exhibits a maximum clamping voltage (VC) of 160 V when subjected to a 10/1000μs waveform at its rated peak pulse current of 3.2 A. This value is measured per ANSI/IEEE C62.35 and confirmed in TSC's SA Series datasheet Version L2105, Table on page 4. The clamping performance ensures protected circuits remain within safe operating limits during automotive load-dump events.
Is SA90H AEC-Q101 qualified, and what does that mean for automotive use?
Yes, SA90H is explicitly AEC-Q101 qualified, as indicated by the "H" suffix in its ordering code and confirmed in the SA Series datasheet. This qualification validates its reliability under accelerated stress tests-including temperature cycling, humidity bias HAST, and mechanical shock-required for automotive electronic components. SA90H is approved for use in engine control, body electronics, and ADAS power domains where field failure is unacceptable.
What is the reverse leakage current of SA90H at its 90V working stand-off voltage?
The SA90H specifies reverse leakage current (IR) of less than 1 μA at its full working stand-off voltage of 90 V, measured at TA = 25°C. This ultra-low leakage preserves standby power integrity in always-on automotive modules such as telematics control units and gateway ECUs, where cumulative leakage across multiple protection devices must be minimized.
Can SA90H be used in bidirectional configurations?
No, SA90H is a unidirectional TVS diode, as confirmed by its part number suffix (no "C" or "CA") and cathode-band marking per DO-204AC mechanical drawing. Bidirectional operation requires SA90CH or SA90CA variants. Using SA90H in reverse-biased AC applications risks permanent failure due to forward conduction during negative half-cycles.
What packaging options are available for SA90H, and what is the standard reel quantity?
SA90H is supplied in tape-and-reel packaging with 3,500 units per reel, per TSC's Ordering Information table (Version L2105, Page 5). Ammo box (1,500 units) is also available under suffix SA90HA0G. Both options use DO-204AC (DO-15) axial-leaded carriers compatible with standard through-hole insertion and wave soldering equipment.
SA90H 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):
- 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)
SA90H FAQ
1.How can I place an order for SA90H through Aetrix?
Please submit a Request for Quotation (RFQ) for SA90H 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 SA90H reliable?
The price and inventory of SA90H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA90H is usually 5 days.
3.What payment methods are accepted for SA90H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA90H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA90H?
SA90H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA90H 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 SA90H?
For technical support, including SA90H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA90H requirements.
6.How does Aetrix verify that SA90H is sourced from the original manufacturer or authorized distributors?
All SA90H 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 SA90H meets industry standards.
7.What is the process for return or replacement of SA90H?
All SA90H units undergo pre-shipment inspection (PSI). If there is an issue with SA90H, 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 SA90H part is unused and in its original packaging.
Return procedure for SA90H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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