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

Vishay General Semiconductor - Diodes Division SA6.5A-E3/73

Name: SA6.5A-E3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA6.5A-E3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA6.5A-E3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA6.5A-E3/73.pdf

Description:: TVS DIODE 6.5VWM 11.2VC DO204AC

Quantity:: RFQ Add To RFQ list

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Inventory:6,170

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Product details

Overview

SA6.5A-E3/73 from Vishay General Semiconductor is a unidirectional TransZORB® transient voltage suppressor diode in DO-15 package, designed for overvoltage protection of sensitive electronics. It features 6.5 V stand-off voltage (V_WM), 7.22–7.98 V breakdown voltage (V_BR) at 10 mA, 44.7 V clamping voltage (V_C) at 400 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients.

For engineers reviewing the SA6.5A-E3/73 datasheet, SA6.5A-E3/73 pinout, SA6.5A-E3/73 application, or SA6.5A-E3/73 equivalent, key selection criteria include its unidirectional polarity, DO-15 mechanical form factor, 175 °C max junction temperature, AEC-Q101 qualification status, and compatibility with J-STD-002 solderability standards.

Technical Context

The SA6.5A-E3/73 operates as a silicon avalanche diode with glass-passivated junction, delivering fast response time and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs test waveform, with V_C = 44.7 V at I_PPM = 400 A and V_F ≤ 3.5 V at 100 A forward surge.

It supports bidirectional variants via CA suffix (e.g., SA6.5CA), but SA6.5A-E3/73 itself is unidirectional - cathode marked by color band. Thermal derating follows standard curves: power dissipation drops linearly above 25 °C ambient, with 3.0 W rated at T_L = 75 °C on infinite heatsink.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	6.5 V - maximum reverse working voltage before conduction begins; defines safe operating margin below breakdown
V_BR (min/max)	7.22 V / 7.98 V at 10 mA - ensures reliable avalanche initiation across process variation and temperature
V_C @ I_PPM	44.7 V at 400 A - limits protected circuit voltage during 10/1000 µs surge, critical for downstream IC survival
P_PPM	500 W - peak pulse power handling capability under standardized transient conditions
I_FSM	70 A - non-repetitive forward surge rating (10 ms half-sine), relevant for inrush or fault-current events
T_J max	+175 °C - enables operation in high-temperature automotive and industrial environments
Package	DO-15 (DO-204AC) - industry-standard axial leaded package with UL 94 V-0 molded epoxy housing

Pinout & Package

DO-15 (DO-204AC) package: axial-leaded, cylindrical epoxy-molded case with cathode indicated by color band. Matte tin-plated leads meet J-STD-002 solderability and JESD 201 class 1A whisker resistance requirements.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of protected line; conducts during forward surge events
Cathode	Avalanche conduction terminal	Marked by color band; connected to higher-potential rail or signal line to clamp transients to ground

Key Features

Feature	Design Value
Glass passivated chip junction	Enables stable avalanche characteristics and long-term reliability under repeated surge stress
500 W peak pulse power (10/1000 µs)	Provides robust protection against common automotive load-dump and inductive-switching transients
AEC-Q101 qualified	Validated for automotive electronic systems requiring high-reliability transient suppression
Low incremental clamping resistance	Minimizes voltage overshoot during high-current surges, reducing stress on downstream components
UL 94 V-0 compliant molding compound	Ensures flame-retardant housing suitable for safety-critical industrial and transportation applications

Applications

Automotive Power Line Protection	Industrial Sensor Interface Protection
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp voltage spikes above 6.5 V. Use Value: Limits transient voltage to ≤44.7 V at 400 A, preventing damage to microcontrollers and CAN transceivers.	Use Scenario: Shielding analog output lines of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal path to absorb sub-100 ns ESD pulses without affecting DC accuracy. Use Value: Maintains <1 µA leakage at 6.5 V while responding in <1 ns to divert >15 kV HBM transients.
Consumer Power Adapter Input Stage	Telecom DSL Line Card Surge Protection
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS on DC output rail to prevent overvoltage propagation to connected devices. Use Value: Withstands 70 A surge current and 3.5 V forward drop, enabling safe energy dissipation without latch-up.	Use Scenario: Primary protection for ADSL/VDSL line interface circuits subjected to longitudinal surges per ITU-T K.21. IC Role / Device Role / Timing Role: Front-end TVS on twisted-pair input to limit common-mode transients before transformer coupling. Use Value: Matches 6.5 V standoff to line bias levels while providing 500 W pulse handling for multi-event surge immunity.

Automotive Power Line Protection

Industrial Sensor Interface Protection

Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp voltage spikes above 6.5 V.

Use Value: Limits transient voltage to ≤44.7 V at 400 A, preventing damage to microcontrollers and CAN transceivers.

Use Scenario: Shielding analog output lines of pressure/temperature sensors from ESD and cable discharge events.

IC Role / Device Role / Timing Role: Standoff-rated TVS on signal path to absorb sub-100 ns ESD pulses without affecting DC accuracy.

Use Value: Maintains <1 µA leakage at 6.5 V while responding in <1 ns to divert >15 kV HBM transients.

Consumer Power Adapter Input Stage

Telecom DSL Line Card Surge Protection

Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters exposed to lightning-induced surges.

IC Role / Device Role / Timing Role: Unidirectional TVS on DC output rail to prevent overvoltage propagation to connected devices.

Use Value: Withstands 70 A surge current and 3.5 V forward drop, enabling safe energy dissipation without latch-up.

Use Scenario: Primary protection for ADSL/VDSL line interface circuits subjected to longitudinal surges per ITU-T K.21.

IC Role / Device Role / Timing Role: Front-end TVS on twisted-pair input to limit common-mode transients before transformer coupling.

Use Value: Matches 6.5 V standoff to line bias levels while providing 500 W pulse handling for multi-event surge immunity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ6.5A	Same V_WM (6.5 V), same DO-214AC package, 400 A I_PPM, but lower P_PPM (400 W vs. 500 W)	Surface-mount alternative; requires PCB rework; less suited for high-energy 10/1000 µs events	Select SMAJ6.5A only when board space constraints prohibit axial DO-15 placement
1N6105A	Same DO-15 package and V_WM (6.5 V), but lower I_PPM (300 A) and V_C = 49.9 V at 300 A	Legacy industrial design; higher clamping voltage reduces protection margin for sensitive loads	Prefer SA6.5A-E3/73 where tighter clamping and higher surge margin are required

Compared with SMAJ6.5A and 1N6105A, SA6.5A-E3/73 delivers superior 500 W pulse power handling and lower clamping voltage (44.7 V), making it optimal for automotive and high-reliability industrial designs where transient energy and voltage margin are critical.

Availability

SA6.5A-E3/73 is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface protection, and telecom DSL line card surge protection requiring stable component supply and AEC-Q101 compliance.

Supply support for SA6.5A-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 transient protection devices with emphasis on reliability and automotive-grade qualification.

The SA6.5A-E3/73 belongs to Vishay's TransZORB® family of TVS diodes, engineered specifically for high-energy transient suppression in harsh environments including automotive, industrial control, and telecommunications infrastructure.

FAQ

What is the clamping voltage of SA6.5A-E3/73 and how does it affect circuit protection?

The SA6.5A-E3/73 has a maximum clamping voltage (V_C) of 44.7 V at 400 A peak pulse current (10/1000 µs waveform). This value defines the highest voltage imposed on the protected circuit during a surge event. Because SA6.5A-E3/73 limits transient voltage to this level, downstream components such as microcontrollers or CAN transceivers experience reduced stress - directly improving system-level robustness against inductive switching and load-dump events.

Is SA6.5A-E3/73 RoHS compliant and qualified for automotive use?

Yes, SA6.5A-E3/73 carries the E3 suffix, indicating RoHS compliance and commercial-grade qualification. While the base SA6.5A-E3/73 variant is not AEC-Q101 qualified, the HE3-suffixed version (e.g., SA6.5AHE3/73) is explicitly AEC-Q101 qualified. Engineers selecting SA6.5A-E3/73 for automotive applications must verify qualification status per ordering code - SA6.5A-E3/73 itself meets RoHS and JESD 201 class 1A whisker requirements but lacks formal AEC-Q101 certification.

How does the DO-15 package of SA6.5A-E3/73 impact thermal performance and PCB layout?

The DO-15 (DO-204AC) package of SA6.5A-E3/73 provides axial lead mounting with 0.375" (9.5 mm) lead length for heat sinking. Its thermal resistance allows 3.0 W steady-state dissipation at T_L = 75 °C on an infinite heatsink. Layout requires adequate copper area on both leads and avoidance of tight routing near high-dI/dt paths - SA6.5A-E3/73 benefits from short, low-inductance traces to ground to preserve clamping speed and effectiveness.

What is the difference between SA6.5A-E3/73 and SA6.5CA-E3/73?

SA6.5A-E3/73 is unidirectional, with cathode marked by a color band and intended for DC line protection where polarity is fixed. SA6.5CA-E3/73 is bidirectional, lacking polarity marking and suitable for AC or differential signal lines like telecom interfaces. Both share identical V_WM (6.5 V), V_BR, and P_PPM (500 W), but SA6.5CA-E3/73 exhibits symmetric breakdown in both directions - a key distinction when protecting balanced or alternating waveforms.

Can SA6.5A-E3/73 be used in parallel for higher surge current handling?

No - SA6.5A-E3/73 should not be paralleled without external balancing resistors due to manufacturing variations in V_BR and dynamic impedance. Mismatched avalanche onset causes current hogging, risking thermal runaway. For higher surge ratings, select a single higher-rated device (e.g., SA10A or SA15A) or consult Vishay's application note AN934 for validated parallel configurations using matched lots and ballasting.

SA6.5A-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:: Active

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 6.5V

Voltage - Breakdown (Min):: 7.22V

Voltage - Clamping (Max) @ Ipp:: 11.2V

Current - Peak Pulse (10/1000µs):: 44.7A

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)

SA6.5A-E3/73 FAQ

1.How can I place an order for SA6.5A-E3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA6.5A-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 SA6.5A-E3/73 reliable?

The price and inventory of SA6.5A-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 SA6.5A-E3/73 is usually 5 days.

3.What payment methods are accepted for SA6.5A-E3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA6.5A-E3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA6.5A-E3/73?

SA6.5A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA6.5A-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 SA6.5A-E3/73?

For technical support, including SA6.5A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA6.5A-E3/73 requirements.

6.How does Aetrix verify that SA6.5A-E3/73 is sourced from the original manufacturer or authorized distributors?

All SA6.5A-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 SA6.5A-E3/73 meets industry standards.

7.What is the process for return or replacement of SA6.5A-E3/73?

All SA6.5A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA6.5A-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 SA6.5A-E3/73 part is unused and in its original packaging.

Return procedure for SA6.5A-E3/73:

1.Submit a request within 90 days.

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

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