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Vishay General Semiconductor - Diodes Division SA90HE3/73
- Part No.:
- SA90HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA90HE3/73.pdf
- Description:
- TVS DIODE 90VWM 160VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,533
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Product details
Overview
SA90HE3/73 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal or power lines. It features a 90 V stand-off voltage (VWM), 100–111 V breakdown voltage (VBR), 146 V maximum clamping voltage at 3.4 A peak pulse current, 500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA90HE3/73 datasheet, SA90HE3/73 pinout, SA90HE3/73 application, or SA90HE3/73 equivalent, key selection criteria include bi-directional clamping capability, 175 °C max junction temperature, RoHS-compliant matte tin-plated leads, UL 94 V-0 molding compound, and compatibility with inductive load switching surge protection in automotive ECUs and industrial sensor interfaces.
Technical Context
This device operates as a voltage-clamping protector in bi-directional configurations, responding to transient overvoltages in both polarities without polarity marking. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive 0.01% duty cycle pulses.
The SA90HE3/73 is rated for 3.0 W steady-state power dissipation at 75 °C lead temperature and supports peak forward surge current up to 70 A (10 ms half-sine) in uni-directional mode - though its bi-directional variant does not specify IFSM, confirming symmetrical reverse/forward clamping behavior per design intent.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 100 V / 111 V at 1 mA - Ensures reliable breakdown onset within defined tolerance band |
| VC @ IPPM | 146 V at 3.4 A - Clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 500 W - Peak transient energy absorption capacity under standard waveform |
| TJ max | +175 °C - Enables operation in under-hood automotive environments and high-ambient industrial settings |
| Package | DO-204AC (DO-15) - Standard axial-leaded through-hole package with 0.300" min lead length, UL 94 V-0 compliant |
| Qualification | AEC-Q101 qualified - Validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, molded epoxy case with glass-passivated chip junction; no polarity marking for bi-directional operation; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets JESD 201 class 2 whisker test (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bi-directional terminal pair | Identical clamping behavior in both directions; no cathode band; installed without orientation constraint |
| Lead 1 | Current path input/output | Connects to protected line (e.g., CAN bus, sensor supply); symmetric conduction path |
| Lead 2 | Current path input/output | Connects to reference plane (e.g., chassis ground or common return); completes transient shunt path |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 500 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 1/2a/3a surges and IEC 61000-4-5 Combination Wave events |
| AEC-Q101 qualification | Validated for automotive electronics including engine control modules and body controllers |
| Glass passivated junction | Ensures stable leakage performance (<1 µA at VWM) and long-term reliability under thermal cycling |
| UL 94 V-0 molding compound | Meets flammability requirements for enclosed industrial and automotive enclosures |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller inputs against load dump and alternator ripple in vehicle ECUs. IC Role / Device Role / Timing Role: Voltage clamping element placed between power rail and ground to divert surge energy away from sensitive logic. Use Value: Limits transient voltage to ≤146 V during 3.4 A surges, preventing latch-up or gate oxide damage in downstream ASICs. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input cards. IC Role / Device Role / Timing Role: Bi-directional transient suppressor across differential signal pairs or single-ended sensor supply lines. Use Value: Maintains signal integrity by clamping ESD and switching noise below 146 V while adding <10 pF capacitance at 0 V bias. |
| Telecom Line Surge Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers in building automation gateways from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary-level TVS placed at connector entry point to absorb bulk surge energy before it reaches isolation barriers. Use Value: Delivers 500 W pulse handling with sub-nanosecond response, reducing need for secondary protection stages. | Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Clamp diode across motor terminals or H-bridge outputs to recycle flyback energy and limit voltage spikes. Use Value: Withstands repetitive 70 A surge currents (10 ms half-sine) and maintains clamping stability up to 175 °C junction temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Same VWM (90 V), higher PPPM (600 W), SMC (DO-214AB) surface-mount package | Requires PCB re-layout; better suited for high-density automotive modules with automated assembly | Select when board space is constrained and reflow compatibility is required over through-hole serviceability |
| 1.5KE91A | Uni-directional, same VWM/VBR range, identical DO-204AC package but lacks AEC-Q101 qualification | Not approved for automotive safety-critical systems; suitable for commercial-grade industrial equipment only | Choose only for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with SMBJ90CA and 1.5KE91A, SA90HE3/73 uniquely combines AEC-Q101 qualification, bi-directional symmetry, and through-hole DO-204AC packaging - making it optimal for serviceable, high-reliability automotive and industrial control boards requiring field-replaceable surge protection.
Availability
SA90HE3/73 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom line surge suppression requiring stable component supply and long-lifecycle support.
Supply support for SA90HE3/73 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and TVS devices with emphasis on reliability, efficiency, and application-specific optimization.
The SAxxHE3 series belongs to Vishay's TRANSZORB® family of transient voltage suppressors, engineered specifically for robust, standardized surge immunity in automotive, industrial, and communications infrastructure applications.
FAQ
What is the clamping voltage of SA90HE3/73 under a 10/1000 µs surge?
The SA90HE3/73 exhibits a maximum clamping voltage (VC) of 146 V at its rated peak pulse current (IPPM) of 3.4 A under the standardized 10/1000 µs waveform. This value is measured across the device terminals during transient event testing and defines the upper voltage limit imposed on protected circuitry - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SA90HE3/73 suitable for automotive applications?
Yes, SA90HE3/73 is AEC-Q101 qualified and explicitly intended for automotive use. Its construction - including glass-passivated junction, UL 94 V-0 epoxy molding, matte tin-plated leads meeting JESD 201 Class 2 whisker resistance, and 175 °C maximum junction temperature - satisfies stringent automotive reliability requirements for engine control units, body electronics, and ADAS sensor interfaces.
Does SA90HE3/73 have polarity markings?
No, SA90HE3/73 is a bi-directional TVS diode and carries no polarity marking (e.g., cathode band). Its symmetrical VBR and clamping characteristics apply equally in both directions, allowing installation without orientation constraints - a key advantage for protecting AC-coupled lines, differential buses like CAN, or floating sensor outputs.
What is the maximum steady-state power dissipation of SA90HE3/73?
The SA90HE3/73 has a maximum steady-state power dissipation (PD) of 3.0 W when mounted on an infinite heatsink at a lead temperature (TL) of 75 °C. Derating applies above this temperature per the curve in Figure 5 of the datasheet, reaching zero dissipation at 175 °C - consistent with its rated TJmax.
How does SA90HE3/73 differ from SA90A?
SA90HE3/73 is the AEC-Q101 qualified, RoHS-compliant bi-directional version (suffix "CA" implied by HE3 designation), whereas SA90A is uni-directional with cathode marking. The "HE3" suffix indicates compliance with JESD 201 Class 2 whisker testing and automotive qualification - confirmed in the mechanical data section of the Vishay document 88378 - making SA90HE3/73 appropriate for mission-critical automotive deployments where SA90A is not certified.
SA90HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- 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):
- 3.1A
- 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)
SA90HE3/73 FAQ
1.How can I place an order for SA90HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA90HE3/73 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 SA90HE3/73 reliable?
The price and inventory of SA90HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA90HE3/73 is usually 5 days.
3.What payment methods are accepted for SA90HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA90HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA90HE3/73?
SA90HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA90HE3/73 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 SA90HE3/73?
For technical support, including SA90HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA90HE3/73 requirements.
6.How does Aetrix verify that SA90HE3/73 is sourced from the original manufacturer or authorized distributors?
All SA90HE3/73 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 SA90HE3/73 meets industry standards.
7.What is the process for return or replacement of SA90HE3/73?
All SA90HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA90HE3/73, 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 SA90HE3/73 part is unused and in its original packaging.
Return procedure for SA90HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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