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

Vishay General Semiconductor - Diodes Division SA9.0CA-E3/54

Name: SA9.0CA-E3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA9.0CA-E3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA9.0CA-E3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA9.0CA-E3/54.pdf

Description:: TVS DIODE 9VWM 15.4VC DO204AC

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Product details

Overview

SA9.0CA-E3/54 from Vishay General Semiconductor is a bidirectional TransZORB® transient voltage suppressor diode in DO-15 package, designed for clamping voltage transients on signal or power lines. It features 500 W peak pulse power (10/1000 μs), 9.0 V stand-off voltage (V_WM), 10.0–11.1 V breakdown voltage (V_BR at 1 mA), 32.5 A peak pulse current (I_PPM), and 15.4 V maximum clamping voltage (V_C) - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits.

For engineers reviewing the SA9.0CA-E3/54 datasheet, SA9.0CA-E3/54 pinout, SA9.0CA-E3/54 application, or SA9.0CA-E3/54 equivalent, key selection criteria include bidirectional clamping capability, DO-15 mechanical compatibility, AEC-Q101 qualification status, low clamping ratio (V_C/V_WM = 1.71), and 175 °C max junction temperature for under-hood or high-reliability embedded use.

Technical Context

The SA9.0CA-E3/54 operates as a symmetrical avalanche diode with identical electrical characteristics in both directions, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at V_WM), while the 10/1000 μs waveform rating reflects standardized surge immunity testing per R.E.A. definitions.

Thermal performance is defined by a 3.0 W steady-state power dissipation on infinite heatsink at T_L = 75 °C and full derating above 25 °C ambient, supporting operation in compact industrial enclosures. The device meets JESD 201 Class 1A whisker resistance and UL 94 V-0 flammability requirements, confirming suitability for automotive and safety-critical PCB layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	9.0 V - Maximum continuous reverse voltage before conduction begins; defines safe operating window for protected circuitry.
V_BR (min/max)	10.0 V / 11.1 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients.
V_C @ I_PPM	15.4 V at 32.5 A - Clamped voltage seen by downstream components during 500 W surge; limits stress on IC inputs.
P_PPM	500 W - Peak surge energy handling capacity per 10/1000 μs waveform; supports IEC 61000-4-5 Level 3/4 compliance.
I_PPM	32.5 A - Corresponding peak current at V_C; determines minimum trace width and fuse coordination.
T_J max	175 °C - Maximum junction temperature; enables placement near heat sources or in sealed enclosures without thermal shutdown.
Leakage @ V_WM	<1.0 μA - Negligible standby current draw; avoids loading of high-impedance sensor bias networks.

Pinout & Package

SA9.0CA-E3/54 uses the DO-15 (DO-204AC) axial-leaded package: molded epoxy body, matte tin-plated leads solderable per J-STD-002, 0.130–0.138 inch diameter, 1.0 inch minimum lead length, and UL 94 V-0 rated compound. Bidirectional construction means no polarity marking - both leads are electrically symmetric.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (symmetrical)	Transient conduction path	Either terminal conducts when voltage exceeds ±V_BR; no cathode band - suitable for AC line or differential bus protection.
Lead 1 / Lead 2	PCB mounting interface	Axial leads support through-hole insertion and wave soldering; 0.375 inch lead length standard for mechanical strain relief.

Key Features

Feature	Design Value
Glass-passivated junction	Ensures stable V_BR tolerance and long-term reliability under repeated surge stress without parameter drift.
500 W peak pulse power (10/1000 μs)	Meets IEC 61000-4-5 surge immunity requirements for industrial control and automotive ECUs without external current limiting.
AEC-Q101 qualified (HE3 variant)	Validated for automotive under-hood applications including engine management, body control modules, and ADAS sensor interfaces.
Low incremental clamping resistance	Minimizes V_C rise with increasing I_PPM, preserving margin between clamped voltage and protected IC absolute maximum ratings.
RoHS-compliant E3 termination	Matte tin plating meets JESD 201 Class 1A whisker resistance, eliminating risk of dendritic growth in humid environments.

Applications

Automotive Sensor Protection	Industrial PLC I/O Protection
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential pair or supply rail to limit transient overvoltage before it reaches sensitive input stages. Use Value: Prevents latch-up or permanent damage to microcontrollers and signal conditioners during ISO 7637-2 Pulse 1/2a/5a events due to its 15.4 V clamping at 32.5 A.	Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring induced surges from solenoid de-energization or lightning-induced coupling. IC Role / Device Role / Timing Role: Standoff voltage clamp mounted directly at terminal block entry point to shunt surge energy to ground before reaching isolation barrier or FPGA I/O banks. Use Value: Maintains system uptime by absorbing 500 W transients without degradation, verified across 1000+ surge cycles per IEC 61000-4-5.
Consumer Appliance Motor Control	Telecom Line Interface Protection
Use Scenario: Shielding gate drivers and current-sense amplifiers in smart appliance inverters from back-EMF spikes generated by brushed DC or BLDC motors. IC Role / Device Role / Timing Role: Fast-response TVS placed across motor phase outputs or DC bus rails to clamp commutation spikes within nanoseconds. Use Value: Enables use of lower-voltage-rated MOSFETs (e.g., 20 V) by limiting transient overshoot to ≤15.4 V, reducing BOM cost and board space.	Use Scenario: Protecting Ethernet PHYs and DSL line drivers from induced surges on twisted-pair telecom lines exposed to outdoor environments or shared conduits. IC Role / Device Role / Timing Role: Symmetric clamping device installed on differential pairs (e.g., MDI/MDIX) to maintain signal integrity while suppressing common-mode transients. Use Value: Preserves data link stability during Telcordia GR-1089-CORE Level 3 surges thanks to matched bidirectional V_BR and sub-μA leakage at 9.0 V.

Automotive Sensor Protection

Industrial PLC I/O Protection

Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in 12 V vehicle systems.

IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential pair or supply rail to limit transient overvoltage before it reaches sensitive input stages.

Use Value: Prevents latch-up or permanent damage to microcontrollers and signal conditioners during ISO 7637-2 Pulse 1/2a/5a events due to its 15.4 V clamping at 32.5 A.

Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring induced surges from solenoid de-energization or lightning-induced coupling.

IC Role / Device Role / Timing Role: Standoff voltage clamp mounted directly at terminal block entry point to shunt surge energy to ground before reaching isolation barrier or FPGA I/O banks.

Use Value: Maintains system uptime by absorbing 500 W transients without degradation, verified across 1000+ surge cycles per IEC 61000-4-5.

Consumer Appliance Motor Control

Telecom Line Interface Protection

Use Scenario: Shielding gate drivers and current-sense amplifiers in smart appliance inverters from back-EMF spikes generated by brushed DC or BLDC motors.

IC Role / Device Role / Timing Role: Fast-response TVS placed across motor phase outputs or DC bus rails to clamp commutation spikes within nanoseconds.

Use Value: Enables use of lower-voltage-rated MOSFETs (e.g., 20 V) by limiting transient overshoot to ≤15.4 V, reducing BOM cost and board space.

Use Scenario: Protecting Ethernet PHYs and DSL line drivers from induced surges on twisted-pair telecom lines exposed to outdoor environments or shared conduits.

IC Role / Device Role / Timing Role: Symmetric clamping device installed on differential pairs (e.g., MDI/MDIX) to maintain signal integrity while suppressing common-mode transients.

Use Value: Preserves data link stability during Telcordia GR-1089-CORE Level 3 surges thanks to matched bidirectional V_BR and sub-μA leakage at 9.0 V.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ9.0A	Unidirectional; SMA package (surface-mount); 10.0–11.1 V V_BR; same V_C (15.4 V) but 32.5 A I_PPM.	Requires polarity-aware layout; better suited for automated SMT assembly and space-constrained designs.	Select SMAJ9.0A when board real estate is limited and unidirectional protection suffices (e.g., DC power rails).
P6SMB9.0CA	Bidirectional; SMB package (surface-mount); 10.0–11.1 V V_BR; 15.4 V V_C; 32.5 A I_PPM; same P_PPM (500 W).	Same functional symmetry as SA9.0CA-E3/54 but requires rework of footprint and thermal pad design.	Choose P6SMB9.0CA for higher-density layouts where axial DO-15 leads are incompatible with modern assembly processes.

Compared with SMAJ9.0A and P6SMB9.0CA, SA9.0CA-E3/54 offers proven through-hole mechanical robustness, AEC-Q101 qualification in HE3 variant, and legacy compatibility with existing DO-15 tooling - making it preferred for high-vibration environments and long-lifecycle industrial programs.

Availability

SA9.0CA-E3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and consumer appliance motor control circuits requiring stable component supply and long-term obsolescence management.

Supply support for SA9.0CA-E3/54 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, power efficiency, and automotive-grade qualification.

The SAxxxA/SAxxxCA series delivers standardized TransZORB® TVS protection across 5.0–170 V standoff ranges, engineered specifically for robust transient suppression in harsh environments including automotive, industrial automation, and telecom infrastructure.

FAQ

What is the clamping voltage of SA9.0CA-E3/54 at its rated peak pulse current?

The SA9.0CA-E3/54 has a maximum clamping voltage (V_C) of 15.4 V when subjected to its rated peak pulse current of 32.5 A using the 10/1000 μs waveform. This value is measured per Figure 9 in the Vishay datasheet 88378 and represents the upper bound of voltage seen by protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within their absolute maximum voltage ratings.

Is SA9.0CA-E3/54 suitable for automotive applications?

Yes, the SA9.0CA-E3/54 is RoHS-compliant and part of the AEC-Q101-qualified SAxxxCA family (specifically the HE3 variant). While the E3 suffix denotes commercial-grade qualification, the underlying die and process are validated to AEC-Q101 for temperature cycling, humidity bias, and surge endurance - enabling use in non-safety-critical automotive subsystems like body electronics, HVAC controls, and infotainment power rails.

How does the bidirectional nature of SA9.0CA-E3/54 affect its PCB layout?

The SA9.0CA-E3/54 has no polarity marking and identical electrical behavior in both directions, so PCB layout requires no orientation check during placement. This simplifies assembly and eliminates risk of reverse installation - especially valuable in differential signal protection (e.g., RS-485, CAN) where traditional unidirectional TVS diodes would require careful anode/cathode alignment relative to ground reference.

What is the maximum operating temperature for SA9.0CA-E3/54?

The SA9.0CA-E3/54 has a maximum junction temperature (T_J) of +175 °C, with derating beginning above 25 °C ambient per Figure 2 in the Vishay datasheet. At 100 °C ambient, its peak pulse power capability drops to approximately 350 W, and its steady-state power dissipation falls to ~1.8 W - values essential for thermal design in enclosed industrial enclosures or under-hood automotive locations.

Does SA9.0CA-E3/54 require a heatsink for continuous operation?

No, the SA9.0CA-E3/54 is not intended for continuous power dissipation; its 3.0 W rating applies only to steady-state conditions on an infinite heatsink at T_L = 75 °C (Figure 5). In normal use, it operates in transient mode - conducting only during surge events - so no heatsink is required. Thermal design focuses instead on PCB copper area for short-duration pulse energy absorption and lead thermal mass for mechanical reliability.

SA9.0CA-E3/54 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

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

Series:: TransZorb®

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: -

Bidirectional Channels:: 1

Voltage - Reverse Standoff (Typ):: 9V

Voltage - Breakdown (Min):: 10V

Voltage - Clamping (Max) @ Ipp:: 15.4V

Current - Peak Pulse (10/1000µs):: 32.5A

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)

SA9.0CA-E3/54 FAQ

1.How can I place an order for SA9.0CA-E3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA9.0CA-E3/54 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 SA9.0CA-E3/54 reliable?

The price and inventory of SA9.0CA-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA9.0CA-E3/54 is usually 5 days.

3.What payment methods are accepted for SA9.0CA-E3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA9.0CA-E3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA9.0CA-E3/54?

SA9.0CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA9.0CA-E3/54 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 SA9.0CA-E3/54?

For technical support, including SA9.0CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA9.0CA-E3/54 requirements.

6.How does Aetrix verify that SA9.0CA-E3/54 is sourced from the original manufacturer or authorized distributors?

All SA9.0CA-E3/54 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 SA9.0CA-E3/54 meets industry standards.

7.What is the process for return or replacement of SA9.0CA-E3/54?

All SA9.0CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA9.0CA-E3/54, 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 SA9.0CA-E3/54 part is unused and in its original packaging.

Return procedure for SA9.0CA-E3/54:

1.Submit a request within 90 days.

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

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