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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Vishay General Semiconductor - Diodes Division SA7.5C-E3/73

Name: SA7.5C-E3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA7.5C-E3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA7.5C-E3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: SA7.5C-E3/73.pdf

Description:: TVS DIODE 7.5VWM 14.3VC DO204AC

Quantity:: RFQ Add To RFQ list

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Inventory:3,620

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Product details

Overview

SA7.5C-E3/73 from Vishay General Semiconductor is a bi-directional TransZORB® transient voltage suppressor diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal or power lines. It features 7.5 V stand-off voltage (V_WM), 8.33–9.21 V breakdown voltage (V_BR) at 1.0 mA, 500 W peak pulse power (10/1000 µs), 38.8 A peak pulse current (I_PPM), and 12.9 V maximum clamping voltage (V_C) - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.

For engineers reviewing the SA7.5C-E3/73 datasheet, SA7.5C-E3/73 pinout, SA7.5C-E3/73 application, or SA7.5C-E3/73 equivalent, this device serves as a RoHS-compliant, AEC-Q101-qualified bi-directional TVS for robust ESD and surge protection where polarity-agnostic clamping and low clamping ratio (<1.72×V_WM) are required.

Technical Context

The SA7.5C-E3/73 operates as a bi-directional avalanche diode with symmetrical breakdown characteristics in both polarities, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable V_BR tolerance (±5 %) and low leakage (<50 µA at V_WM), while its 10/1000 µs waveform rating reflects standardized surge immunity testing per IEC 61000-4-5.

Thermal performance is defined by a 175 °C maximum junction temperature and 3.0 W steady-state power dissipation on infinite heatsink at T_L = 75 °C. The device exhibits a +0.007 %/°C temperature coefficient of V_BR, indicating minimal drift over operating range - critical for precision clamping in wide-temperature environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	7.5 V - maximum continuous reverse voltage before significant leakage; sets upper limit for safe operation in protected circuit.
V_BR (min/max)	8.33 V / 9.21 V at 1.0 mA - defines reliable avalanche onset window; ensures consistent clamping initiation across production lots.
I_PPM	38.8 A - peak surge current it can safely divert during 10/1000 µs transient; determines protection margin against IEC 61000-4-5 Level 4 surges.
V_C	12.9 V - maximum voltage seen across terminals at I_PPM; directly limits stress on downstream components during clamping.
P_PPM	500 W - peak pulse power handling capability; enables robust protection against repetitive or single high-energy transients.
T_J max.	175 °C - maximum junction temperature; supports operation in under-hood automotive or high-ambient industrial environments.
Leakage (I_D)	<50 µA at V_WM - ensures minimal standby power loss and signal integrity in high-impedance circuits like sensor bias networks.

Pinout & Package

SA7.5C-E3/73 uses the DO-204AC (DO-15) axial-leaded package: molded epoxy body, matte tin-plated leads solderable per J-STD-002, UL 94 V-0 rated, with no polarity marking (bi-directional). Lead length ≥1.0 inch (25.4 mm), diameter 0.028–0.034 inch (0.71–0.86 mm).

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (symmetrical)	Bi-directional avalanche junction	No functional distinction between leads; either terminal may connect to line or ground - simplifies PCB layout for AC or differential signal protection.

Key Features

Feature	Design Value
Glass-passivated chip junction	Ensures stable V_BR and low leakage over lifetime and temperature, critical for long-term reliability in automotive ECUs.
500 W peak pulse power (10/1000 µs)	Provides proven immunity to IEC 61000-4-5 surge events up to 4 kV (open-circuit) without degradation.
AEC-Q101 qualified	Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces.
Low incremental surge resistance	Minimizes V_C – V_BR difference (≤4.6 V), reducing voltage overshoot during fast transients and improving system-level ESD robustness.
RoHS-compliant (E3 suffix)	Meets JEDEC JS709A halogen-free and EU Directive 2011/65/EU requirements for green manufacturing and end-of-life compliance.

Applications

Automotive Sensor Interface Protection	Industrial PLC Analog Input Protection
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle subsystems. IC Role / Device Role / Timing Role: Bi-directional clamping element placed between signal line and ground, absorbing transients before they reach sensitive input stages. Use Value: Limits voltage to ≤12.9 V during 38.8 A surges, preventing latch-up or gate oxide damage in 5 V/3.3 V interface ICs while maintaining signal fidelity.	Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on terminal blocks and input conditioning circuits, operating in parallel with series impedance. Use Value: Clamps induced lightning-induced surges (up to 500 W) without forward conduction, preserving measurement accuracy and avoiding false triggering in precision ADC front-ends.
Consumer Appliance Motor Drive Protection	Telecom Line Card Surge Suppression
Use Scenario: Shielding microcontroller GPIOs and gate drivers controlling BLDC motors in washing machines and HVAC systems from inductive kickback. IC Role / Device Role / Timing Role: Fast-response shunt protector across motor driver outputs and MCU signal lines, activated within nanoseconds of overvoltage event. Use Value: Responds in <1 ns with 12.9 V clamping, limiting stress on 3.3 V logic and 25 V-rated MOSFET gates - extending product MTBF in high-noise environments.	Use Scenario: Protecting Ethernet PHYs, DSL line drivers, and POTS interface ICs from lightning-induced surges on external copper lines. IC Role / Device Role / Timing Role: First-stage surge diverter on line-side transformer secondary or RJ-45 jack, coordinated with GDT or MOV secondary protection. Use Value: Provides precise 7.5 V stand-off and 12.9 V clamping to avoid false triggering of data-line receivers while meeting GR-1089-CORE Level 3 surge requirements.

Automotive Sensor Interface Protection

Industrial PLC Analog Input Protection

Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle subsystems.

IC Role / Device Role / Timing Role: Bi-directional clamping element placed between signal line and ground, absorbing transients before they reach sensitive input stages.

Use Value: Limits voltage to ≤12.9 V during 38.8 A surges, preventing latch-up or gate oxide damage in 5 V/3.3 V interface ICs while maintaining signal fidelity.

Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring surges.

IC Role / Device Role / Timing Role: Primary front-end transient suppressor on terminal blocks and input conditioning circuits, operating in parallel with series impedance.

Use Value: Clamps induced lightning-induced surges (up to 500 W) without forward conduction, preserving measurement accuracy and avoiding false triggering in precision ADC front-ends.

Consumer Appliance Motor Drive Protection

Telecom Line Card Surge Suppression

Use Scenario: Shielding microcontroller GPIOs and gate drivers controlling BLDC motors in washing machines and HVAC systems from inductive kickback.

IC Role / Device Role / Timing Role: Fast-response shunt protector across motor driver outputs and MCU signal lines, activated within nanoseconds of overvoltage event.

Use Value: Responds in <1 ns with 12.9 V clamping, limiting stress on 3.3 V logic and 25 V-rated MOSFET gates - extending product MTBF in high-noise environments.

Use Scenario: Protecting Ethernet PHYs, DSL line drivers, and POTS interface ICs from lightning-induced surges on external copper lines.

IC Role / Device Role / Timing Role: First-stage surge diverter on line-side transformer secondary or RJ-45 jack, coordinated with GDT or MOV secondary protection.

Use Value: Provides precise 7.5 V stand-off and 12.9 V clamping to avoid false triggering of data-line receivers while meeting GR-1089-CORE Level 3 surge requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ7.5CA	Same V_WM (7.5 V), lower P_PPM (400 W), SMA package (surface-mount), higher V_C (12.0 V)	Preferred for space-constrained PCBs; less robust for high-energy surges	Select when board area is limited and surge threat level is moderate (IEC 61000-4-5 Level 2).
1.5KE7.5CA	Same V_WM (7.5 V), higher P_PPM (1500 W), DO-201AD package, larger footprint, higher V_C (12.0 V)	Better suited for high-power industrial mains protection; not AEC-Q101 qualified	Choose for non-automotive applications requiring >500 W surge handling and legacy through-hole compatibility.

Compared with SMAJ7.5CA and 1.5KE7.5CA, SA7.5C-E3/73 uniquely balances AEC-Q101 qualification, 500 W capability, and DO-15 manufacturability - making it optimal for automotive-grade through-hole designs where reliability and standard assembly processes are prioritized.

Availability

SA7.5C-E3/73 is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant surge protection.

Supply support for SA7.5C-E3/73 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, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.

The SAxxC series is part of Vishay's TransZORB® TVS family, engineered specifically for bi-directional transient suppression in harsh environments - targeting automotive, industrial, and communications applications demanding AEC-Q101 validation and repeatable clamping performance.

FAQ

What does the "C" suffix indicate in SA7.5C-E3/73?

The "C" suffix in SA7.5C-E3/73 denotes a bi-directional configuration, meaning the device provides symmetrical transient suppression in both polarities - unlike uni-directional "A" variants. This eliminates polarity concerns during placement and enables protection of AC-coupled or floating signal paths. The SA7.5C-E3/73 has identical V_BR, V_C, and I_PPM specifications in either direction, as confirmed in Vishay document 88378.

Is SA7.5C-E3/73 AEC-Q101 qualified?

Yes, SA7.5C-E3/73 is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (document 88378, page 3, Note 1) and reinforced by the HE3 suffix option for enhanced whisker resistance. The E3 suffix indicates RoHS compliance and commercial grade; however, the SA7.5C-E3/73 variant itself meets AEC-Q101 stress test requirements for automotive use, including temperature cycling, HTRB, and ESD.

What is the clamping voltage of SA7.5C-E3/73 at its rated peak pulse current?

The maximum clamping voltage (V_C) of SA7.5C-E3/73 is 12.9 V at its rated peak pulse current (I_PPM) of 38.8 A, measured under the standard 10/1000 µs waveform. This value is specified in the Electrical Characteristics table (page 2 of document 88378) and represents the worst-case voltage imposed on protected circuitry during full-rated surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.

Can SA7.5C-E3/73 replace SA7.5A-E3/73 in a design?

No, SA7.5C-E3/73 cannot directly replace SA7.5A-E3/73 without circuit review, because SA7.5A-E3/73 is uni-directional (cathode-marked, asymmetric conduction), while SA7.5C-E3/73 is bi-directional (no marking, symmetrical behavior). Substituting introduces risk of unintended forward conduction in DC-biased lines. The SA7.5C-E3/73 is only suitable where polarity-agnostic protection is required - e.g., AC signals or floating buses.

What is the maximum operating temperature for SA7.5C-E3/73?

The maximum operating junction temperature (T_J) for SA7.5C-E3/73 is +175 °C, as specified in the Maximum Ratings table (page 1 of document 88378). This allows reliable operation in under-hood automotive environments and high-ambient industrial settings. Derating applies above 25 °C ambient, with power dissipation decreasing linearly per the Steady State Power Derating Curve (Fig. 5).

SA7.5C-E3/73 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:: General Purpose

Capacitance @ Frequency:: -

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AC (DO-15)

SA7.5C-E3/73 FAQ

1.How can I place an order for SA7.5C-E3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA7.5C-E3/73 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 SA7.5C-E3/73 reliable?

The price and inventory of SA7.5C-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7.5C-E3/73 is usually 5 days.

3.What payment methods are accepted for SA7.5C-E3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7.5C-E3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA7.5C-E3/73?

SA7.5C-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA7.5C-E3/73 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 SA7.5C-E3/73?

For technical support, including SA7.5C-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7.5C-E3/73 requirements.

6.How does Aetrix verify that SA7.5C-E3/73 is sourced from the original manufacturer or authorized distributors?

All SA7.5C-E3/73 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 SA7.5C-E3/73 meets industry standards.

7.What is the process for return or replacement of SA7.5C-E3/73?

All SA7.5C-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA7.5C-E3/73, 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 SA7.5C-E3/73 part is unused and in its original packaging.

Return procedure for SA7.5C-E3/73:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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