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

Vishay General Semiconductor - Diodes Division SA9.0CHE3/73

Name: SA9.0CHE3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA9.0CHE3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA9.0CHE3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA9.0CHE3/73.pdf

Description:: TVS DIODE 9VWM 16.9VC DO204AC

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Product details

Overview

SA9.0CHE3/73 from Vishay 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 9.0 V stand-off voltage (V_WM), 15.4 V maximum clamping voltage (V_C) at 5.0 A peak pulse current (I_PPM), and 500 W peak pulse power (10/1000 μs waveform), with AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the SA9.0CHE3/73 datasheet, SA9.0CHE3/73 pinout, SA9.0CHE3/73 application, or SA9.0CHE3/73 equivalent, this device is selected for robust ESD and surge protection in automotive sensor interfaces, industrial I/O lines, and telecom line-card circuits where bidirectional clamping and low-leakage (<5.0 μA at V_WM) are required.

Technical Context

The SA9.0CHE3/73 operates as a bi-directional avalanche breakdown device, symmetrically clamping both positive and negative transients above its breakdown voltage range of 10.0–11.1 V (tested at 1.0 mA). Its glass-passivated junction ensures stable leakage and fast response (<1 ns), while the DO-204AC package supports manual or automated through-hole assembly with matte tin-plated leads compliant to J-STD-002.

It delivers 500 W peak pulse power per 10/1000 μs waveform at T_A = 25 °C, derating linearly above 25 °C per Fig. 2, and sustains 3.0 W steady-state power at T_L = 75 °C. Junction temperature range is –55 °C to +175 °C, and it meets AEC-Q101 stress test requirements for automotive underhood applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	9.0 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 5 V–9 V nominal systems.
V_BR (min/max)	10.0 V / 11.1 V - Breakdown occurs within this range at 1.0 mA test current; ensures predictable turn-on across production lots.
V_C @ I_PPM	15.4 V @ 5.0 A - Clamped voltage during 10/1000 μs transient; limits downstream IC stress to safe levels.
I_D @ V_WM	<5.0 μA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits.
P_PPM	500 W - Peak transient energy absorption capability; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges.
T_J max.	+175 °C - High-temperature junction rating enables use in engine control units and power converters.
Qualification	AEC-Q101 qualified - Validated for automotive electronics per stress test standard including HTOL, TC, and HTRB.

Pinout & Package

Package: DO-204AC (DO-15), axial leaded, molded epoxy case meeting UL 94 V-0 flammability rating. Matte tin-plated leads, solderable per J-STD-002. Bi-directional polarity - no marking on body.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (symmetrical)	Bi-directional transient conduction path	No functional polarity - either lead serves as input/output; enables placement without orientation check.
Lead 1 / Lead 2	Current-carrying terminals	Both leads conduct equally during positive or negative transients; requires no PCB silkscreen polarity indicator.

Key Features

Feature	Design Value
Bi-directional clamping	Enables single-device protection of AC-coupled or differential lines (e.g., RS-485, CAN, sensor bridges) without polarity constraints.
500 W peak pulse power (10/1000 μs)	Withstands repetitive lightning-induced surges up to 500 W without degradation, supporting industrial IEC 61000-4-5 compliance.
Glass passivated chip junction	Ensures stable V_BR tolerance and low leakage over temperature and lifetime, critical for automotive sensor front-ends.
AEC-Q101 qualification	Validated for automotive underhood environments including thermal cycling, high-temp bias, and humidity testing.
RoHS-compliant HE3 suffix	Meets JESD 201 Class 2 whisker resistance and EU RoHS Directive 2011/65/EU; suitable for automotive Tier-1 supply chains.

Applications

Automotive Sensor Interface	Industrial Digital I/O Protection
Use Scenario: Protecting analog outputs and digital status lines of engine coolant temperature (ECT), manifold absolute pressure (MAP), and throttle position sensors from load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller ADC or GPIO pin. Use Value: Limits transient excursions to ≤15.4 V, preventing latch-up or gate oxide damage in 3.3 V/5 V automotive MCUs.	Use Scenario: Safeguarding PLC digital input modules connected to 24 V DC field devices subject to relay coil flyback and cable ESD events. IC Role / Device Role / Timing Role: Primary surge suppression element on each channel's input trace, upstream of optocoupler or Schmitt trigger. Use Value: Absorbs 500 W pulses without failure, enabling >100,000 surge cycles per IEC 61000-4-5, reducing field return rates.
Telecom Line Card Protection	Consumer Appliance Motor Control
Use Scenario: Shielding Ethernet PHY interface pins and auxiliary management lines (e.g., MDIO, SMBus) on base station line cards from induced surges on nearby AC power traces. IC Role / Device Role / Timing Role: Secondary-level TVS on low-voltage control signals adjacent to primary AC-line protectors. Use Value: Sub-5 μA leakage avoids signal attenuation on 100 Mbps differential pairs; 15.4 V clamping aligns with 3.3 V PHY rail limits.	Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machine control boards, especially during direction reversal and brake activation. IC Role / Device Role / Timing Role: Clamp placed across motor terminals or H-bridge supply rails to limit back-EMF voltage overshoot. Use Value: Withstands 70 A non-repetitive forward surge (IFSM), surviving repeated motor stall conditions without parametric shift.

Automotive Sensor Interface

Industrial Digital I/O Protection

Use Scenario: Protecting analog outputs and digital status lines of engine coolant temperature (ECT), manifold absolute pressure (MAP), and throttle position sensors from load dump and inductive switching noise.

IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller ADC or GPIO pin.

Use Value: Limits transient excursions to ≤15.4 V, preventing latch-up or gate oxide damage in 3.3 V/5 V automotive MCUs.

Use Scenario: Safeguarding PLC digital input modules connected to 24 V DC field devices subject to relay coil flyback and cable ESD events.

IC Role / Device Role / Timing Role: Primary surge suppression element on each channel's input trace, upstream of optocoupler or Schmitt trigger.

Use Value: Absorbs 500 W pulses without failure, enabling >100,000 surge cycles per IEC 61000-4-5, reducing field return rates.

Telecom Line Card Protection

Consumer Appliance Motor Control

Use Scenario: Shielding Ethernet PHY interface pins and auxiliary management lines (e.g., MDIO, SMBus) on base station line cards from induced surges on nearby AC power traces.

IC Role / Device Role / Timing Role: Secondary-level TVS on low-voltage control signals adjacent to primary AC-line protectors.

Use Value: Sub-5 μA leakage avoids signal attenuation on 100 Mbps differential pairs; 15.4 V clamping aligns with 3.3 V PHY rail limits.

Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machine control boards, especially during direction reversal and brake activation.

IC Role / Device Role / Timing Role: Clamp placed across motor terminals or H-bridge supply rails to limit back-EMF voltage overshoot.

Use Value: Withstands 70 A non-repetitive forward surge (IFSM), surviving repeated motor stall conditions without parametric shift.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ9.0AHE3/A	Uni-directional; 9.0 V V_WM, 14.4 V V_C @ 5.0 A; SMA package (SMT); lower I_PPM (34.7 A vs. 5.0 A for SA9.0CHE3/73).	Requires polarity-aware layout; suited for space-constrained PCBs where through-hole is not feasible.	Select when surface-mount assembly is mandatory and unidirectional protection suffices (e.g., DC power rails).
P6SMB9.0AHE3/A	Uni-directional; 9.0 V V_WM, 14.4 V V_C @ 5.0 A; SMB package (SMT); same P_PPM (600 W), higher I_PPM (34.7 A).	Higher surge rating but incompatible polarity handling; lacks bi-directional symmetry needed for AC-coupled signals.	Choose for higher-energy unidirectional surges where footprint and thermal performance outweigh polarity flexibility.

Compared with SMAJ9.0AHE3/A and P6SMB9.0AHE3/A, the SA9.0CHE3/73 provides true bi-directional clamping in a through-hole DO-15 package with AEC-Q101 qualification-making it uniquely suitable for automotive sensor analog outputs and industrial AC signal paths where polarity independence and mechanical robustness are essential.

Availability

SA9.0CHE3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O modules, and telecom line-card protection requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge immunity.

Supply support for SA9.0CHE3/73 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 passive components with emphasis on reliability, efficiency, and automotive-grade qualification.

The SAxxxC series is part of Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial automation, and telecommunications infrastructure-where consistent clamping and long-term stability are mission-critical.

FAQ

What is the breakdown voltage range for SA9.0CHE3/73?

The SA9.0CHE3/73 has a minimum breakdown voltage (V_BR) of 10.0 V and a maximum of 11.1 V, measured at 1.0 mA test current. This range ensures reliable, repeatable clamping onset across temperature and manufacturing variation, and is confirmed in the Vishay document 88378, Table on page 2. The SA9.0CHE3/73 uses a bi-directional structure, so this V_BR applies identically in both polarities.

Is SA9.0CHE3/73 suitable for automotive applications?

Yes, the SA9.0CHE3/73 is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (document 88378, page 3, Note 1 and page 1, FEATURES section). Its –55 °C to +175 °C operating junction temperature range, glass-passivated junction, and validated stress-test performance make it appropriate for under-hood and body-control module applications. The SA9.0CHE3/73 meets automotive reliability requirements without derating.

What is the maximum clamping voltage of SA9.0CHE3/73 at rated peak pulse current?

The SA9.0CHE3/73 exhibits a maximum clamping voltage (V_C) of 15.4 V at 5.0 A peak pulse current (I_PPM) under the standard 10/1000 μs waveform. This value is specified in the Electrical Characteristics table (page 2 of document 88378) and defines the upper voltage limit imposed on protected circuitry during surge events. The SA9.0CHE3/73 maintains this clamping performance across its full operating temperature range.

Does SA9.0CHE3/73 have polarity markings on the package?

No, the SA9.0CHE3/73 does not have polarity markings because it is a bi-directional TVS diode. As confirmed in the "MECHANICAL DATA" section of the Vishay datasheet (page 1), "no marking on bi-directional types." This allows flexible PCB placement without orientation constraints-both leads are functionally identical. The SA9.0CHE3/73 is intended for use on AC-coupled or differential signal paths where polarity independence is required.

What package type is used for SA9.0CHE3/73?

The SA9.0CHE3/73 uses the DO-204AC (also known as DO-15) package: an axial-leaded, molded epoxy case with 0.300" ±0.070" body length and 0.140" ±0.005" diameter, per Vishay's outline drawing (page 5 of document 88378). Leads are matte tin-plated and compliant with J-STD-002 solderability standards. The SA9.0CHE3/73 is through-hole mounted and rated for solder dip at 275 °C for up to 10 seconds.

SA9.0CHE3/73 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):: 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)

SA9.0CHE3/73 FAQ

1.How can I place an order for SA9.0CHE3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA9.0CHE3/73 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 SA9.0CHE3/73 reliable?

The price and inventory of SA9.0CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA9.0CHE3/73 is usually 5 days.

3.What payment methods are accepted for SA9.0CHE3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA9.0CHE3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA9.0CHE3/73?

SA9.0CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA9.0CHE3/73 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 SA9.0CHE3/73?

For technical support, including SA9.0CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA9.0CHE3/73 requirements.

6.How does Aetrix verify that SA9.0CHE3/73 is sourced from the original manufacturer or authorized distributors?

All SA9.0CHE3/73 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 SA9.0CHE3/73 meets industry standards.

7.What is the process for return or replacement of SA9.0CHE3/73?

All SA9.0CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA9.0CHE3/73, 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 SA9.0CHE3/73 part is unused and in its original packaging.

Return procedure for SA9.0CHE3/73:

1.Submit a request within 90 days.

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

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