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Vishay General Semiconductor - Diodes Division SA7.5CHE3/73
- Part No.:
- SA7.5CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA7.5CHE3/73.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,206
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Product details
Overview
SA7.5CHE3/73 from Vishay General Semiconductor is a unidirectional 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 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA, 12.9 V maximum clamping voltage (VC) at 50 A peak pulse current, 500 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA7.5CHE3/73 datasheet, SA7.5CHE3/73 pinout, SA7.5CHE3/73 application, or SA7.5CHE3/73 equivalent, this page delivers verified electrical parameters, polarity marking guidance, thermal derating behavior, and validated automotive-grade alternatives - all aligned to Vishay Document #88378 Rev. 18-Sep-12.
Technical Context
This TVS diode operates as a shunt-type transient suppressor: under normal bias it presents high impedance (>600 μA leakage at 7.5 V), then rapidly avalanches into low-impedance conduction when transient voltage exceeds VBR, clamping the protected node to ≤12.9 V at 50 A. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Designed for single-polarity DC systems, SA7.5CHE3/73 uses cathode-band polarity marking and supports soldering per J-STD-002/JESD 22-B102. It is rated for -55 °C to +175 °C operating junction temperature and meets UL 94 V-0 flammability with matte tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse working voltage before leakage exceeds 50 μA; sets upper limit for safe DC rail operation. |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - Confirmed avalanche onset range; defines minimum overvoltage threshold for clamping activation. |
| VC @ IPPM | 12.9 V at 50 A - Measured clamping voltage during 10/1000 μs transient; determines worst-case voltage seen by downstream ICs. |
| PPPM | 500 W - Peak pulse power handling capability; enables suppression of high-energy transients like ISO 7637-2 Pulse 1/2a/5a. |
| TJ max | +175 °C - Maximum junction temperature rating; supports under-hood automotive placement with minimal heatsinking. |
| Qualification | AEC-Q101 qualified - Validated for automotive electronic modules requiring robust reliability across temperature cycling, humidity, and mechanical stress. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0. Cathode identified by color band on body; anode is unmarked lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VLINE > VBR. |
| Anode (unmarked end) | Reference/ground return path | Typically tied to system ground or low-impedance return; completes clamping current loop during transient event. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable VBR and low leakage drift over temperature and lifetime - critical for long-term automotive reliability. |
| 500 W peak pulse power (10/1000 μs) | Supports suppression of severe load-dump and inductive-switching transients without degradation in automotive 12 V systems. |
| AEC-Q101 qualification | Validates performance across extended temperature (-55 °C to +175 °C), vibration, and humidity stress - required for engine control, body electronics, and ADAS modules. |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 - eliminates risk of intermetallic growth in high-reliability assemblies. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against ISO 7637-2 load dump (up to 60 V, 400 ms) and inductive switching spikes. IC Role / Device Role / Timing Role: Shunt clamping device placed between power rail and chassis ground, responding within <1 ns to divert surge energy. Use Value: Limits rail voltage to ≤12.9 V during 50 A transients, preventing damage to microcontrollers, CAN transceivers, and power management ICs. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC inputs against ESD and field-wiring transients. IC Role / Device Role / Timing Role: Bidirectional-capable protection element (though SA7.5CHE3/73 is unidirectional, used with series resistor for AC-coupled signals) on signal lines entering industrial enclosures. Use Value: Clamps fast-rising transients (e.g., IEC 61000-4-2 ±8 kV contact) before they reach precision ADC front-ends, preserving measurement integrity. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Line Protection |
Use Scenario: Secondary-side overvoltage protection in wall adapters supplying USB-C PD or legacy 5–12 V devices. IC Role / Device Role / Timing Role: Final-stage clamp after primary-side regulation, absorbing residual surges from input rectifier or transformer leakage. Use Value: Prevents latch-up or gate oxide rupture in downstream USB port controllers by limiting output rail excursion to 12.9 V during fault conditions. | Use Scenario: Protecting -48 V telecom DC distribution lines feeding remote radio units or baseband processors from lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional shunt suppressor installed between -48 V rail and signal ground, referenced to negative supply potential. Use Value: Maintains safe voltage margin below absolute maximum ratings of -48 V tolerant interface ICs (e.g., RS-485 transceivers), even during 500 W impulse 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 |
|---|---|---|---|
| SMAJ7.5A-E3/5A | Same DO-214AC (SMA) package; identical VWM/VBR/VC specs but lower PPPM (400 W vs. 500 W); no AEC-Q101 qualification. | Preferred for space-constrained consumer PCBs where 400 W suffices and automotive qualification is not required. | Select SMAJ7.5A-E3/5A only if board area is limited and AEC-Q101 is unnecessary; verify thermal margin at 400 W. |
| 1.5KE7.5A | DO-201AD package; same VWM/VBR but higher VC (13.4 V at 38.8 A); 1500 W PPPM; no AEC-Q101. | Suitable for high-energy industrial surge environments (e.g., motor drives) where larger footprint is acceptable and tighter clamping is secondary to energy handling. | Choose 1.5KE7.5A when suppressing multi-kW transients; confirm layout accommodates larger DO-201AD body and lead spacing. |
Compared with SMAJ7.5A-E3/5A and 1.5KE7.5A, SA7.5CHE3/73 uniquely combines 500 W pulse power, AEC-Q101 qualification, and DO-15 form factor - making it optimal for cost-sensitive, thermally constrained automotive modules requiring certified reliability without redesigning board layout for SMD or larger through-hole packages.
Availability
SA7.5CHE3/73 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom DC feeder line safeguarding requiring stable component supply and full traceability.
Supply support for SA7.5CHE3/73 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SAxxxA family was developed specifically for robust, cost-effective transient suppression in automotive, industrial, and telecom infrastructure - prioritizing tight VBR tolerance, low clamping ratio, and qualification-grade process control.
FAQ
What is the polarity configuration of SA7.5CHE3/73?
SA7.5CHE3/73 is a unidirectional TVS diode with cathode indicated by a color band on the body. The banded end connects to the line being protected, while the unmarked anode lead connects to ground. This configuration allows it to clamp positive transients only - ideal for protecting positive DC rails like automotive 12 V systems.
Does SA7.5CHE3/73 meet automotive reliability standards?
Yes, SA7.5CHE3/73 carries the HE3 suffix, confirming AEC-Q101 qualification per Vishay Document #88378. It has undergone stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life - validating its suitability for engine control units, body control modules, and ADAS sensors in production vehicles.
What is the maximum clamping voltage of SA7.5CHE3/73 under surge conditions?
The maximum clamping voltage (VC) of SA7.5CHE3/73 is 12.9 V at 50 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions and defines the highest voltage imposed on the protected circuit during a worst-case transient - ensuring compatibility with 15 V-tolerant ICs and MOSFETs.
Can SA7.5CHE3/73 be used in bi-directional signal line protection?
No - SA7.5CHE3/73 is unidirectional and lacks symmetrical breakdown in reverse bias. For bi-directional signal protection (e.g., RS-485, USB D+/D−), use the CA-suffixed variant SA7.5CHE3/73's counterpart SA7.5CHE3/73 is not rated for reverse conduction beyond its specified leakage current at VWM.
What packaging and plating does SA7.5CHE3/73 use?
SA7.5CHE3/73 uses a DO-204AC (DO-15) axial package with molded UL 94 V-0 epoxy and matte tin-plated leads. The plating complies with J-STD-002 for solderability and JESD 201 Class 2 for whisker resistance - ensuring long-term reliability in automated assembly and harsh environmental deployments.
SA7.5CHE3/73 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 35A
- 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)
SA7.5CHE3/73 FAQ
1.How can I place an order for SA7.5CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA7.5CHE3/73 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 SA7.5CHE3/73 reliable?
The price and inventory of SA7.5CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7.5CHE3/73 is usually 5 days.
3.What payment methods are accepted for SA7.5CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7.5CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA7.5CHE3/73?
SA7.5CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA7.5CHE3/73 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 SA7.5CHE3/73?
For technical support, including SA7.5CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7.5CHE3/73 requirements.
6.How does Aetrix verify that SA7.5CHE3/73 is sourced from the original manufacturer or authorized distributors?
All SA7.5CHE3/73 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 SA7.5CHE3/73 meets industry standards.
7.What is the process for return or replacement of SA7.5CHE3/73?
All SA7.5CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA7.5CHE3/73, 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 SA7.5CHE3/73 part is unused and in its original packaging.
Return procedure for SA7.5CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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