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Vishay General Semiconductor - Diodes Division SA9.0HE3/73
- Part No.:
- SA9.0HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA9.0HE3/73.pdf
- Description:
- TVS DIODE 9VWM 16.9VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,884
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Product details
Overview
SA9.0HE3/73 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 9.0 V stand-off voltage, 10.0–11.1 V breakdown voltage at 1.0 mA, 15.4 V clamping voltage at 32.5 A peak pulse current, and 500 W peak pulse power with 10/1000 μs waveform. It protects MOSFETs and ICs against inductive switching transients in automotive power supplies.
For engineers reviewing the SA9.0HE3/73 datasheet, SA9.0HE3/73 pinout, SA9.0HE3/73 application, or SA9.0HE3/73 equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, DO-15 mechanical data, clamping performance under standardized surge conditions, and direct alternatives for circuit protection design.
Technical Context
The SA9.0HE3/73 employs a glass-passivated silicon junction optimized for fast transient response (<1 ns), low incremental surge resistance, and stable clamping across temperature. Its uni-directional polarity features a cathode band marking and supports 70 A non-repetitive forward surge current per JESD22-A112.
Designed for bi-directional-capable families but configured as uni-directional, it operates within -55 °C to +175 °C junction range, dissipates 3.0 W continuously on infinite heatsink at 75 °C lead temperature, and meets UL 94 V-0 flammability requirements in its molded epoxy case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 9.0 V - Maximum continuous reverse operating voltage before clamping initiates |
| Breakdown Voltage (VBR) | 10.0–11.1 V at 1.0 mA - Confirmed avalanche onset range defining reliable turn-on threshold |
| Clamping Voltage (VC) | 15.4 V at 32.5 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge |
| Peak Pulse Power (PPPM) | 500 W - Sustained energy absorption capability under standardized transient waveform |
| Reverse Leakage (ID) | 5.0 μA max at 9.0 V - Minimal standby power loss and signal integrity impact in high-impedance circuits |
| Operating Temperature | -55 °C to +175 °C - Validated performance across automotive under-hood and industrial control environments |
| AEC-Q101 Qualified | Yes - Certified for automotive electronics per stress test requirements including HTRB, HTGB, and temperature cycling |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to lower-potential side of protected line; conducts during positive surges when used in reverse-biased configuration |
| Cathode | Clamping reference terminal | Marked end; connects to higher-potential rail (e.g., VBUS); defines clamping path to ground during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable leakage performance and long-term reliability under thermal cycling and humidity exposure |
| 500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-earth) in properly designed front-end stages |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS subsystems requiring zero-failure field performance |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during transients, reducing stress on downstream MOSFET gate oxides and logic inputs |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for enclosed industrial and transportation equipment enclosures |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump spikes (up to 35 V, 100 ms) and alternator ripple in 12 V battery-fed ECUs. IC Role / Device Role / Timing Role: Primary clamping device placed between battery rail and DC-DC input, responding within <1 ns to limit voltage excursion. Use Value: Prevents permanent damage to buck controller ICs and microcontrollers by holding rail voltage ≤15.4 V during 32.5 A surge events. | Use Scenario: Guarding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules exposed to relay coil flyback. IC Role / Device Role / Timing Role: Low-leakage (5.0 μA) shunt clamp on signal line, activated only during >10 V transients. Use Value: Maintains signal fidelity during normal operation while diverting >30 A surges away from precision op-amps and ADC inputs. |
| Consumer Appliance Motor Drive Protection | Telecom Power Feeding Line Protection |
Use Scenario: Protecting half-bridge gate drivers in washing machine motor inverters from inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Uni-directional TVS placed across high-side MOSFET drain-source, conducting only during negative-going transients. Use Value: Limits VDS stress to 15.4 V, enabling use of 20 V-rated MOSFETs instead of higher-voltage, higher-RDS(on) alternatives. | Use Scenario: Safeguarding PoE (Power over Ethernet) injector ports against lightning-induced surges on 48 V DC feeding lines. IC Role / Device Role / Timing Role: First-stage clamping element on DC feed path, coordinated with GDT and series impedance for multi-stage protection. Use Value: Absorbs initial 500 W surge energy without degradation, preserving downstream DC-DC converter and PHY IC integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0AHE3/A | Same VWM (9.0 V), identical DO-214AC (SMA) package; 10% lower PPPM (400 W), slightly higher VC (15.5 V at 28.5 A) | Surface-mount alternative for space-constrained PCBs; requires rework of footprint and thermal relief design | Select when board area is limited and automated assembly is preferred over through-hole mounting |
| P6SMB9.0AHE3/A | Same VWM (9.0 V), DO-214AA (SMB) package; 500 W rating, but higher VF (3.5 V) and larger package height (2.6 mm vs. DO-15's 3.6 mm length) | Higher power density than DO-15; better thermal dissipation in forced-air environments | Select when thermal management under sustained surge duty exceeds DO-15 capability or when SMB footprint already exists in BOM |
Compared with SMAJ9.0AHE3/A and P6SMB9.0AHE3/A, the SA9.0HE3/73 offers through-hole mechanical robustness, proven AEC-Q101 qualification for automotive vibration/shock, and optimal cost-per-joule in legacy designs using axial-leaded components.
Availability
SA9.0HE3/73 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and consumer appliance motor drive circuits requiring stable component supply across extended production lifecycles.
Supply support for SA9.0HE3/73 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 optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SAxxA series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust, low-clamping overvoltage protection in automotive, industrial, and telecom infrastructure where failure modes must be mitigated without compromising signal integrity.
FAQ
What is the maximum clamping voltage of the SA9.0HE3/73 under standard surge conditions?
The SA9.0HE3/73 exhibits a maximum clamping voltage (VC) of 15.4 V when subjected to a 10/1000 μs waveform with a peak pulse current (IPPM) of 32.5 A. This value is measured per JEDEC standards and ensures downstream components see no more than 15.4 V during transient events. The SA9.0HE3/73 maintains this clamping performance across its full operating temperature range (-55 °C to +175 °C).
Is the SA9.0HE3/73 qualified for automotive applications?
Yes, the SA9.0HE3/73 carries AEC-Q101 qualification, confirming compliance with stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling. Its DO-204AC package and glass-passivated junction meet automotive reliability requirements for engine control units, body electronics, and infotainment power rails. The SA9.0HE3/73 is explicitly listed in Vishay's AEC-Q101 qualified devices matrix.
How does the SA9.0HE3/73 differ from bi-directional variants like SA9.0CA?
The SA9.0HE3/73 is a uni-directional TVS diode with cathode marking and forward conduction capability, whereas SA9.0CA is bi-directional with no polarity marking and symmetrical clamping in both directions. The SA9.0HE3/73 supports 70 A forward surge current and has lower forward voltage (VF = 3.5 V at 100 A), making it suitable for DC power line protection. SA9.0CA is intended for AC signal or data line protection where polarity reversal occurs.
What is the reverse leakage current specification for the SA9.0HE3/73 at rated stand-off voltage?
The SA9.0HE3/73 specifies a maximum reverse leakage current (ID) of 5.0 μA at its rated stand-off voltage (VWM) of 9.0 V and ambient temperature of 25 °C. This low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in battery-powered systems. The SA9.0HE3/73 maintains leakage below 50 μA up to 80 % of VWM across its full temperature range.
Can the SA9.0HE3/73 be used in parallel for higher surge current handling?
No - the SA9.0HE3/73 is not recommended for parallel connection due to inherent parameter variation (e.g., VBR tolerance ±5 %) that causes current imbalance and potential thermal runaway. For higher IPPM requirements, select a single higher-rated device such as SA12A (12 V, 25.1 A) or consult Vishay's application note AN1002 on TVS derating. The SA9.0HE3/73 is characterized and tested as a standalone protection element.
SA9.0HE3/73 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 16.9V
- Current - Peak Pulse (10/1000µs):
- 29.6A
- 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)
SA9.0HE3/73 FAQ
1.How can I place an order for SA9.0HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA9.0HE3/73 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 SA9.0HE3/73 reliable?
The price and inventory of SA9.0HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA9.0HE3/73 is usually 5 days.
3.What payment methods are accepted for SA9.0HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA9.0HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA9.0HE3/73?
SA9.0HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA9.0HE3/73 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 SA9.0HE3/73?
For technical support, including SA9.0HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA9.0HE3/73 requirements.
6.How does Aetrix verify that SA9.0HE3/73 is sourced from the original manufacturer or authorized distributors?
All SA9.0HE3/73 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 SA9.0HE3/73 meets industry standards.
7.What is the process for return or replacement of SA9.0HE3/73?
All SA9.0HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA9.0HE3/73, 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 SA9.0HE3/73 part is unused and in its original packaging.
Return procedure for SA9.0HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA9.0HE3/73 Tags
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