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

Vishay General Semiconductor - Diodes Division SA30C-E3/73

Name: SA30C-E3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA30C-E3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA30C-E3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA30C-E3/73.pdf

Description:: TVS DIODE 30VWM 53.5VC DO204AC

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Product details

Overview

SA30C-E3/73 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 30 V stand-off voltage (V_WM), 48.4 V maximum clamping voltage (V_C) at 10 A peak pulse current, 500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the SA30C-E3/73 datasheet, SA30C-E3/73 pinout, SA30C-E3/73 application, or SA30C-E3/73 equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under surge conditions, and validated alternatives for ESD and inductive-switching protection in automotive sensor interfaces and industrial control I/O.

Technical Context

The SA30C-E3/73 operates as a symmetrical bi-directional TVS, with identical breakdown characteristics in both polarities (V_BR min/max = 33.3 V / 36.8 V at 1.0 mA). Its glass-passivated junction enables fast response (<1 ns) to transient events and low incremental surge resistance, critical for protecting downstream ICs from 8/20 µs or 10/1000 µs surges.

It is rated for continuous power dissipation of 3.0 W on an infinite heatsink at T_L = 75 °C, operates across –55 °C to +175 °C junction temperature, and exhibits a typical temperature coefficient of +0.036 %/°C - ensuring stable clamping performance over wide thermal ranges in engine bay or industrial environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	30 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin for 24 V nominal systems.
V_BR (min/max)	33.3 V / 36.8 V at 1.0 mA - Confirmed breakdown threshold range; ensures reliable triggering above system transients but below IC absolute maximum ratings.
V_C @ I_PPM	48.4 V at 10 A (10/1000 µs) - Clamped voltage seen by protected circuit during worst-case surge; limits stress on 40 V-rated MOSFETs or microcontrollers.
P_PPM	500 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out.
T_J max	+175 °C - Maximum junction temperature; enables placement near heat sources (e.g., power relays, motor drivers) without derating concerns.
AEC-Q101	Qualified - Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces per stress test requirements.

Pinout & Package

SA30C-E3/73 uses the DO-204AC (DO-15) axial-leaded package: molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, 0.300" (7.6 mm) minimum lead length, and 0.140" (3.6 mm) maximum body diameter. Bi-directional construction means no polarity marking - either lead may serve as anode or cathode depending on transient polarity.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (symmetrical)	Transient conduction path	Both terminals function identically; conducts bidirectionally when voltage exceeds ±V_BR, enabling single-device protection of AC-coupled or floating lines.
Lead 1 / Lead 2	PCB interconnect interface	Matte tin-plated, solderable per J-STD-002/JESD 22-B102; supports wave/solder dip up to 275 °C for 10 s; no polarity-dependent layout required.

Key Features

Feature	Design Value
Glass-passivated junction	Enables <1 ns response time and stable leakage (<1.0 µA at V_WM), critical for preserving signal integrity on high-speed sensor lines.
500 W peak pulse power (10/1000 µs)	Withstands repeated 4 kV IEC 61000-4-5 surges without degradation when PCB trace inductance is minimized.
AEC-Q101 qualification	Validated for automotive under-hood use - includes HTOL, TC, UHAST, and mechanical shock testing per stress test plan.
Bi-directional symmetry	Eliminates need for orientation-aware placement or dual-diode solutions on differential or AC-coupled buses (e.g., LIN, CAN stubs, analog sensor outputs).

Applications

Automotive Sensor Protection	Industrial PLC I/O Protection
Use Scenario: Protecting analog output lines (e.g., 0–5 V throttle position sensor) from load-dump and inductive kickback in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Standby clamping device placed directly at connector entry point; triggers within nanoseconds to shunt surge energy before it reaches MCU ADC input. Use Value: Limits transient voltage to ≤48.4 V, preventing latch-up or gate oxide damage in 5 V or 3.3 V signal chain components.	Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to relay coil flyback and ESD in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines; operates in parallel with optocoupler input stage to absorb >500 W surge energy. Use Value: Maintains functional safety by preventing false triggering or permanent failure during repetitive 1 kV/500 A surge events per IEC 61000-4-4.
Telecom Line Interface	Consumer Appliance Motor Control
Use Scenario: Shielding RS-485 transceiver pins from lightning-induced surges on outdoor security camera data runs. IC Role / Device Role / Timing Role: First-line transient suppressor on differential bus lines; paired with common-mode chokes to meet IEC 61000-4-5 Level 3 (2 kV line-earth). Use Value: Clamps common-mode transients to <50 V while preserving differential signal swing - avoids communication lockup or transceiver latch-up.	Use Scenario: Protecting microcontroller GPIOs driving brushed DC motors in washing machines or HVAC blowers subject to commutation noise. IC Role / Device Role / Timing Role: Localized TVS at motor driver IC output pins; absorbs inductive spikes generated during PWM switching transitions. Use Value: Prevents reset corruption or flash memory corruption caused by >30 V transients coupled into 3.3 V logic rails via shared ground paths.

Automotive Sensor Protection

Industrial PLC I/O Protection

Use Scenario: Protecting analog output lines (e.g., 0–5 V throttle position sensor) from load-dump and inductive kickback in 12 V/24 V vehicle systems.

IC Role / Device Role / Timing Role: Standby clamping device placed directly at connector entry point; triggers within nanoseconds to shunt surge energy before it reaches MCU ADC input.

Use Value: Limits transient voltage to ≤48.4 V, preventing latch-up or gate oxide damage in 5 V or 3.3 V signal chain components.

Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to relay coil flyback and ESD in factory automation cabinets.

IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines; operates in parallel with optocoupler input stage to absorb >500 W surge energy.

Use Value: Maintains functional safety by preventing false triggering or permanent failure during repetitive 1 kV/500 A surge events per IEC 61000-4-4.

Telecom Line Interface

Consumer Appliance Motor Control

Use Scenario: Shielding RS-485 transceiver pins from lightning-induced surges on outdoor security camera data runs.

IC Role / Device Role / Timing Role: First-line transient suppressor on differential bus lines; paired with common-mode chokes to meet IEC 61000-4-5 Level 3 (2 kV line-earth).

Use Value: Clamps common-mode transients to <50 V while preserving differential signal swing - avoids communication lockup or transceiver latch-up.

Use Scenario: Protecting microcontroller GPIOs driving brushed DC motors in washing machines or HVAC blowers subject to commutation noise.

IC Role / Device Role / Timing Role: Localized TVS at motor driver IC output pins; absorbs inductive spikes generated during PWM switching transitions.

Use Value: Prevents reset corruption or flash memory corruption caused by >30 V transients coupled into 3.3 V logic rails via shared ground paths.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ30CA	Same V_WM (30 V), lower P_PPM (400 W), SMA package (surface-mount)	Requires rework for SMT assembly; less robust thermal coupling than axial DO-15 in high-power surge scenarios	Preferred where board space is constrained and surge levels are ≤3 kV.
1.5KE30CA	Higher P_PPM (1500 W), same V_WM/V_C, DO-201AD package (larger axial form factor)	Overqualified for 500 W needs; adds cost and footprint without benefit in most 24 V control applications	Select only when legacy designs require DO-201AD or surge testing exceeds IEC 61000-4-5 Level 4.

Compared with SMAJ30CA and 1.5KE30CA, SA30C-E3/73 delivers optimal balance of automotive qualification, 500 W surge capacity, and DO-15 manufacturability - making it the preferred choice for new 24 V automotive and industrial designs requiring AEC-Q101 compliance without overengineering.

Availability

SA30C-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance motor control requiring stable component supply and long-term lifecycle support.

Supply support for SA30C-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, TVS devices, and optoelectronics with emphasis on reliability, automotive qualification, and high-volume manufacturing.

The SAxxC series was developed specifically for robust, cost-effective transient suppression in automotive and industrial environments - prioritizing AEC-Q101 compliance, tight V_BR tolerance, and stable clamping under thermal stress.

FAQ

What is the exact breakdown voltage range for SA30C-E3/73?

The SA30C-E3/73 has a guaranteed breakdown voltage (V_BR) range of 33.3 V to 36.8 V at 1.0 mA test current, per Vishay Document Number 88378. This bi-directional specification applies equally in both polarities and is measured at T_A = 25 °C. The device's temperature coefficient of +0.036 %/°C ensures predictable upward drift under elevated ambient conditions.

Is SA30C-E3/73 RoHS compliant and halogen-free?

Yes, SA30C-E3/73 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and halogen-free status per JEDEC JS709A. The matte tin-plated leads and UL 94 V-0 epoxy molding compound meet all applicable environmental and safety standards for commercial and automotive applications.

Does SA30C-E3/73 have polarity markings on the package?

No, SA30C-E3/73 is a bi-directional TVS diode and carries no polarity marking on its DO-204AC (DO-15) package. Both leads are functionally identical - the device clamps symmetrically for positive and negative transients, eliminating orientation constraints during placement and simplifying PCB layout.

What is the maximum clamping voltage of SA30C-E3/73 under surge conditions?

The SA30C-E3/73 clamps to a maximum of 48.4 V when subjected to a 10 A peak pulse current with a 10/1000 µs waveform, as specified in the Vishay SA5.0A–SA170CA datasheet. This value represents the upper limit of voltage seen by protected circuitry during standardized surge testing and is critical for ensuring compatibility with 40 V-rated downstream components.

Can SA30C-E3/73 be used in place of uni-directional TVS diodes like SA30A-E3/73?

No - SA30C-E3/73 is strictly bi-directional and must not replace uni-directional types such as SA30A-E3/73 in DC-biased circuits. Using SA30C-E3/73 where a uni-directional device is specified risks forward conduction during normal operation, leading to excessive leakage or thermal runaway. Always match polarity type to circuit topology and bias conditions.

SA30C-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):: 30V

Voltage - Breakdown (Min):: 33.3V

Voltage - Clamping (Max) @ Ipp:: 53.5V

Current - Peak Pulse (10/1000µs):: 9.3A

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)

SA30C-E3/73 FAQ

1.How can I place an order for SA30C-E3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA30C-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 SA30C-E3/73 reliable?

The price and inventory of SA30C-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 SA30C-E3/73 is usually 5 days.

3.What payment methods are accepted for SA30C-E3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA30C-E3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA30C-E3/73?

SA30C-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA30C-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 SA30C-E3/73?

For technical support, including SA30C-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA30C-E3/73 requirements.

6.How does Aetrix verify that SA30C-E3/73 is sourced from the original manufacturer or authorized distributors?

All SA30C-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 SA30C-E3/73 meets industry standards.

7.What is the process for return or replacement of SA30C-E3/73?

All SA30C-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA30C-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 SA30C-E3/73 part is unused and in its original packaging.

Return procedure for SA30C-E3/73:

1.Submit a request within 90 days.

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

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