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Taiwan Semiconductor Corporation SA90AH
- Part No.:
- SA90AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA90AH.pdf
- Description:
- TVS DIODE 90VWM 146VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,898
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Product details
Overview
SA90AH 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 clamps to ≤160V at 3.2A peak pulse current. It delivers fast response (<1.0ps from 0V to VBR) and low leakage (<1μA @ 10V) for automotive-grade ESD and load-dump protection.
For engineers reviewing the SA90AH datasheet, SA90AH pinout, SA90AH application, or SA90AH equivalent, key selection criteria include its AEC-Q101 qualification, 90V VWM / 100–122V VBR range, 160V clamping voltage at 3.2A, DO-15 mechanical compatibility, and suitability for 12V/24V automotive power rail surge suppression.
Technical Context
The SA90AH operates as a unidirectional avalanche diode with precise breakdown voltage (100–122V at 1mA test current) and exhibits low dynamic impedance under transient stress. Its clamping performance is characterized by VC = 160V at IPPM = 3.2A (10/1000μs), enabling robust protection of downstream DC-DC converters and microcontrollers against ISO 7637-2 pulse 1, 2a, and 5a events.
Designed for automotive environments, it supports junction temperatures from –55°C to +175°C and features pure tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Polarity is marked via cathode band, and the device meets RoHS and halogen-free (IEC 61249-2-21) requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before clamping begins; matches 24V automotive systems with margin for ripple and transients. |
| VBR min/max | 100 / 122 V @ 1 mA - Confirmed avalanche breakdown range ensures reliable turn-on during overvoltage events without premature conduction. |
| VC @ IPPM | 160 V @ 3.2 A - Clamping voltage limits protected circuit stress during 10/1000μs surges; enables safe operation of 100V-rated MOSFETs or LDOs. |
| PPK | 500 W - Peak pulse power rating per 10/1000μs waveform; validates compliance with ISO 7637-2 Level III/IV surge immunity requirements. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage preserves battery life in always-on automotive modules (e.g., CAN nodes, body controllers). |
| TJ max | +175 °C - Extended junction temperature rating supports under-hood placement near engines or power electronics. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with 0.400g mass; compatible with legacy through-hole assembly and automated tape-and-reel handling (3500/reel). |
Pinout & Package
DO-204AC (DO-15) package with axial leads: Cathode indicated by molded band; anode and cathode terminals are non-polarized in layout but functionally asymmetric for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input reference node for unidirectional clamping | Connected to protected line (e.g., battery rail); conducts surge current toward ground when cathode is held at higher potential. |
| Cathode | Clamp output / ground return path | Connected to system ground or low-impedance return; establishes forward-biased path during positive transients on the anode side. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use per stress test requirements including HTOL, TC, UHAST, and ESD-HBM/MM, ensuring reliability in vehicle ECUs and ADAS modules. |
| Fast response time | <1.0 ps rise-to-breakdown enables sub-nanosecond suppression of ESD events (IEC 61000-4-2 ±8 kV contact), preventing latch-up in sensitive logic. |
| Low clamping ratio | VC/VBR ≈ 1.4–1.6 maintains tight overvoltage control-critical for protecting 100V-rated gate drivers and analog front-ends. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU, supporting green manufacturing and end-of-life recycling mandates. |
Applications
| Automotive Power Rail Protection | Infotainment System ESD Guarding |
|---|---|
Use Scenario: Suppressing load dump (ISO 7637-2 Pulse 5a) and alternator overshoot on 24V commercial vehicle battery lines. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage to clamp transients before they reach regulation circuitry. Use Value: Limits peak voltage to ≤160V, preventing damage to 100V-input buck controllers and preserving system uptime during engine cranking or alternator failure. | Use Scenario: Protecting USB-C, HDMI, and LVDS interfaces in head units and digital clusters from ESD discharge during user interaction. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector entry points to shunt ±8kV HBM ESD pulses directly to chassis ground. Use Value: Sub-1.0ps response prevents data corruption or interface IC latch-up, maintaining video/audio integrity without signal degradation. |
| Body Control Module (BCM) Input Protection | ADAS Camera Power Conditioning |
Use Scenario: Safeguarding LIN bus transceivers and GPIO inputs in door modules and lighting controllers exposed to wiring harness transients. IC Role / Device Role / Timing Role: Standoff-rated TVS (90V VWM) placed upstream of level translators and protection FETs to absorb coupled noise from adjacent high-current loads. Use Value: Enables stable 5V/3.3V rail operation despite 100V+ spikes induced by relay switching or motor commutation in shared harnesses. | Use Scenario: Securing 12V camera module power inputs against ignition-induced surges and hot-swap transients in surround-view systems. IC Role / Device Role / Timing Role: Primary clamping device on main power feed, coordinated with ceramic capacitors and ferrite beads to form multi-stage filtering network. Use Value: Maintains uninterrupted image capture during cold-cranking (–40°C to +175°C operation) while meeting ASIL-B functional safety constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90A | Same DO-214AC package; 90V VWM, 100–122V VBR, but lower PPK (400W) and higher VC (156V @ 2.6A); no AEC-Q101 qualification. | Not suitable for automotive under-hood use; limited to industrial or consumer-grade 24V systems requiring cost-sensitive alternatives. | Select SMAJ90A only if AEC-Q101 is not required and peak surge energy is ≤400W. |
| 1.5KE91A | DO-201AD package; 91V VWM, 101–111V VBR, 500W rating, but slower response (~1ns) and no AEC-Q101; higher IR (5μA @ 91V). | Larger footprint and thermal mass; less suited for compact automotive PCBs; requires derating above 75°C ambient. | Choose 1.5KE91A only when DO-201AD mounting is already standardized and AEC-Q101 compliance is waived. |
Compared with SMAJ90A and 1.5KE91A, SA90AH provides guaranteed AEC-Q101 qualification, tighter VBR tolerance, lower leakage, and DO-15 compatibility-making it the preferred choice for automotive power rail protection where reliability, thermal stability, and regulatory compliance are mandatory.
Availability
SA90AH is available at Aetrix Electronics and suitable for automotive power rail protection, infotainment ESD guarding, and body control module input protection requiring stable component supply across production lifecycles.
Supply support for SA90AH 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, with global distribution and AEC-Q101-compliant automotive product lines.
The SA Series is designed specifically for high-reliability automotive transient suppression, targeting ISO 7637-2 and IEC 61000-4-5 compliance in 12V/24V vehicle electrical architectures.
FAQ
What is the AEC-Q101 qualification status of SA90AH?
The SA90AH is explicitly AEC-Q101 qualified per the manufacturer's ordering code suffix "H", confirmed in the SA Series datasheet Version L2105. This qualification covers temperature cycling, high-temperature operating life, unbiased highly accelerated stress testing, and ESD-HBM/MM validation-ensuring suitability for automotive under-hood and chassis-mounted applications where reliability is critical. SA90AH meets all stress test requirements defined in AEC-Q101 Rev D.
Does SA90AH support bidirectional transient suppression?
No, SA90AH is a unidirectional TVS diode, as indicated by its part number suffix "H" (not "CA" or "C") and confirmed by its specified VBR and VC parameters for single-polarity operation. It clamps only positive transients on the anode relative to cathode. For bidirectional protection, SA90A or SA90CA variants must be used-SA90AH is strictly for 24V rail-to-ground suppression in automotive power systems.
What is the maximum clamping voltage of SA90AH and at what current is it measured?
The maximum clamping voltage (VC) of SA90AH is 160 V, measured at a peak pulse current (IPPM) of 3.2 A under the standard 10/1000 μs double-exponential waveform. This value is specified in the "Maximum Ratings and Electrical Characteristics" table for SA90 in Version L2105 of the datasheet and defines the upper voltage limit imposed on protected circuits during worst-case surge events.
Can SA90AH be used in place of SA90A in an existing design?
SA90AH can replace SA90A electrically and mechanically-both share identical VWM (90 V), VBR (100–122 V), VC (160 V), DO-204AC package, and pinout-but SA90AH adds AEC-Q101 qualification and tighter process controls. No PCB changes are needed; however, SA90AH should only be substituted where automotive qualification is required, as SA90A lacks formal AEC-Q101 validation and may not meet long-term reliability demands in vehicle applications.
What is the junction temperature range and thermal derating behavior of SA90AH?
SA90AH operates across a junction temperature range of –55°C to +175°C, with peak pulse power derated linearly above TA = 25°C per Figure 2 in the datasheet. At 75°C ambient, its steady-state power dissipation is 3 W (mounted on 10 × 10 mm copper pads), and its 500W surge capability decreases to ~350W. This wide thermal range supports deployment in engine compartments, battery management systems, and other high-heat automotive zones without thermal shutdown.
SA90AH 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:
- 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)
SA90AH FAQ
1.How can I place an order for SA90AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA90AH 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 SA90AH reliable?
The price and inventory of SA90AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA90AH is usually 5 days.
3.What payment methods are accepted for SA90AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA90AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA90AH?
SA90AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA90AH 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 SA90AH?
For technical support, including SA90AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA90AH requirements.
6.How does Aetrix verify that SA90AH is sourced from the original manufacturer or authorized distributors?
All SA90AH 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 SA90AH meets industry standards.
7.What is the process for return or replacement of SA90AH?
All SA90AH units undergo pre-shipment inspection (PSI). If there is an issue with SA90AH, 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 SA90AH part is unused and in its original packaging.
Return procedure for SA90AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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