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Vishay General Semiconductor - Diodes Division SA17HE3/73
- Part No.:
- SA17HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA17HE3/73.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,695
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Product details
Overview
SA17HE3/73 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 µs), clamping voltage of 27.6 V at 18.1 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA17HE3/73 datasheet, SA17HE3/73 pinout, SA17HE3/73 application, or SA17HE3/73 equivalent, this part is selected for robust transient suppression in 12 V automotive subsystems, industrial sensor interfaces, and MOSFET gate driver protection where fast response (<1 ns), low clamping ratio, and high surge current tolerance are critical.
Technical Context
The SA17HE3/73 operates as a uni-directional avalanche diode with glass-passivated junction, enabling stable breakdown behavior under repetitive transients. Its 10/1000 µs waveform rating supports IEC 61000-4-5 Level 4 surge immunity when used with appropriate series impedance.
Designed for placement across protected nodes and ground, it conducts only during reverse-biased overvoltage events - suppressing spikes while remaining non-conductive under normal 12 V rail operation. The 175 °C maximum junction temperature and JESD22-B106-compliant solderability support reflow and wave-solder assembly in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before conduction begins; matches nominal 12 V system rails with margin for ripple and tolerance. |
| VBR (min/max) | 18.9 V / 20.9 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above normal operating voltage but below IC absolute maximum ratings. |
| VC @ IPPM | 27.6 V at 18.1 A - Clamped voltage during 500 W transient; limits downstream device stress to safe levels during ISO 7637-2 pulse 1/2a/5a events. |
| PPPM | 500 W - Peak pulse power handling per 10/1000 µs waveform; sufficient for automotive load dump and inductive switching surges. |
| IFSM | 70 A - Non-repetitive forward surge current rating; supports fault-current limiting in series-FET protection schemes. |
| TJ max | 175 °C - Maximum junction temperature; enables operation in under-hood automotive locations and industrial enclosures without derating. |
| Qualification | AEC-Q101 qualified - Validated for automotive electronic modules per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case meeting UL 94 V-0 flammability rating. Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node (e.g., ground or return path); carries surge current during clamping. |
| Cathode | Reverse-biased avalanche terminal | Connected to protected line (e.g., 12 V rail or signal); initiates clamping when voltage exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable, repeatable breakdown voltage and long-term reliability under thermal cycling and humidity exposure. |
| 500 W peak pulse power (10/1000 µs) | Handles automotive load dump and inductive switch-off transients without degradation across >10,000 cycles. |
| AEC-Q101 qualification | Validated for use in engine control units, body electronics, and ADAS sensors requiring automotive-grade component assurance. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or lightning-induced surges), improving clamping precision. |
| RoHS-compliant HE3 suffix | Indicates AEC-Q101 qualification and JESD201 Class 2 whisker resistance - suitable for lead-free reflow and high-reliability assembly. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply inputs of ECUs, lighting controllers, and infotainment head units against ISO 7637-2 pulses and alternator load dump. IC Role / Device Role / Timing Role: Uni-directional TVS placed between battery rail and local regulator input to clamp transients before LDO or DC/DC stage. Use Value: Limits clamped voltage to 27.6 V, well below typical 36 V absolute maximum ratings of automotive PMICs and microcontrollers. |
Use Scenario: Safeguarding analog outputs and digital I/O of pressure, temperature, and position sensors in factory automation systems. IC Role / Device Role / Timing Role: Mounted at connector interface to shunt induced surges from motor drives, solenoids, or relay coils before reaching sensor ASIC. Use Value: Sub-1 ns response time prevents latch-up or damage to low-voltage sensor front-ends operating at 3.3 V or 5 V. |
| MOSFET Gate Driver Protection | Telecom Line Interface Protection |
|
Use Scenario: Shielding high-side and low-side gate drivers in motor inverters and power supplies from Miller-induced voltage spikes and shoot-through transients. IC Role / Device Role / Timing Role: Connected between gate and source terminals to clamp dv/dt-induced overshoot during switching transitions. Use Value: 27.6 V clamping voltage prevents gate oxide breakdown in 20–30 V rated MOSFETs while maintaining fast turn-on/turn-off timing. |
Use Scenario: Protecting RS-485 transceivers, Ethernet PHYs, and DSL line drivers from lightning-induced surges and AC power cross-talk. IC Role / Device Role / Timing Role: Installed on differential pair lines (A/B) referenced to chassis ground to suppress common-mode transients up to ±1 kV. Use Value: 500 W rating and low capacitance (<100 pF) preserve signal integrity at data rates up to 25 Mbps without added jitter or attenuation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/52 (Vishay) | Same VWM (17 V), identical DO-214AC (SMA) package, 400 W PPPM, slightly higher VC (27.7 V). | Surface-mount alternative; requires PCB layout change; lower power rating reduces margin for sustained surges. | Select when space-constrained layouts demand SMT assembly and 400 W suffices for target surge profile. |
| 1.5KE18A (ON Semiconductor) | Same VWM (17 V), DO-201AD package, 1500 W PPPM, higher VC (27.7 V), no AEC-Q101 qualification. | Higher power handling but larger footprint; lacks automotive qualification and tighter VBR tolerance. | Select for industrial power supplies needing higher single-pulse energy absorption where automotive qualification is not required. |
Compared with SMAJ17A-E3/52 and 1.5KE18A, SA17HE3/73 delivers AEC-Q101 assurance in a through-hole DO-15 package with optimal 500 W/27.6 V clamping balance for cost-sensitive automotive and industrial designs requiring proven reliability and easy manual or wave-solder assembly.
Availability
SA17HE3/73 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply, traceable sourcing, and long-term lifecycle support.
Supply support for SA17HE3/73 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 protection devices with emphasis on reliability, efficiency, and application-specific performance.
The SAxxHE3 series targets automotive and industrial transient suppression, delivering AEC-Q101-qualified, glass-passivated TVS diodes optimized for robustness in harsh electrical environments and high-volume manufacturing.
FAQ
What is the polarity configuration of the SA17HE3/73?
The SA17HE3/73 is a uni-directional Transient Voltage Suppressor. Its cathode is marked by a color band on the body, and it conducts only when reverse-biased beyond its breakdown voltage. This configuration makes SA17HE3/73 ideal for protecting positive DC rails where forward conduction must be blocked during normal operation.
Does the SA17HE3/73 meet automotive qualification standards?
Yes, the SA17HE3/73 is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HE3". This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and unbiased highly accelerated stress testing - validating SA17HE3/73 for under-hood and safety-critical automotive modules.
What is the clamping voltage of the SA17HE3/73 under peak surge conditions?
The SA17HE3/73 exhibits a maximum clamping voltage (VC) of 27.6 V at its rated peak pulse current (IPPM) of 18.1 A, measured using the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events, ensuring compatibility with 36 V-rated downstream ICs.
Can the SA17HE3/73 be used in bi-directional protection circuits?
No, the SA17HE3/73 is strictly a uni-directional TVS diode. For bi-directional applications - such as AC line or differential signal protection - Vishay offers the SA170CA variant. Using SA17HE3/73 in bi-directional configurations would result in forward conduction and potential failure during negative half-cycles.
What package type and lead finish does the SA17HE3/73 use?
The SA17HE3/73 uses the DO-204AC (DO-15) axial-leaded package with matte tin-plated leads. It complies with J-STD-002 and JESD 22-B102 for solderability and withstands solder dip at 275 °C for up to 10 seconds, making SA17HE3/73 compatible with both wave and selective soldering processes.
SA17HE3/73 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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 16.4A
- 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)
SA17HE3/73 FAQ
1.How can I place an order for SA17HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA17HE3/73 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 SA17HE3/73 reliable?
The price and inventory of SA17HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA17HE3/73 is usually 5 days.
3.What payment methods are accepted for SA17HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA17HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA17HE3/73?
SA17HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA17HE3/73 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 SA17HE3/73?
For technical support, including SA17HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA17HE3/73 requirements.
6.How does Aetrix verify that SA17HE3/73 is sourced from the original manufacturer or authorized distributors?
All SA17HE3/73 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 SA17HE3/73 meets industry standards.
7.What is the process for return or replacement of SA17HE3/73?
All SA17HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA17HE3/73, 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 SA17HE3/73 part is unused and in its original packaging.
Return procedure for SA17HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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