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

Vishay General Semiconductor - Diodes Division SA6.5HE3/73

Name: SA6.5HE3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA6.5HE3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA6.5HE3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA6.5HE3/73.pdf

Description:: TVS DIODE 6.5VWM 12.3VC DO204AC

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Product details

Overview

SA6.5HE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 6.5 V stand-off voltage (V_WM), 7.22–7.98 V breakdown voltage (V_BR) at 10 mA, 500 W peak pulse power (10/1000 µs), clamping voltage of 11.2 V at 44.7 A, and AEC-Q101 qualification for automotive use.

For engineers reviewing the SA6.5HE3/73 datasheet, SA6.5HE3/73 pinout, SA6.5HE3/73 application, or SA6.5HE3/73 equivalent, this device is selected for robust ESD and surge protection in automotive infotainment power supplies, industrial sensor interfaces, and 12 V board-level DC bus lines where fast response (<1 ns), low clamping ratio, and high surge current tolerance are critical.

Technical Context

The SA6.5HE3/73 employs a glass-passivated silicon junction optimized for transient suppression with low incremental surge resistance and excellent clamping linearity under 10/1000 µs surges. Its unidirectional polarity enables integration into DC-biased circuits without reverse conduction concerns, and its 175 °C maximum junction temperature supports operation in under-hood automotive environments.

It delivers 44.7 A peak pulse current (I_PPM) at 11.2 V clamping voltage while maintaining <600 µA reverse leakage at V_WM, ensuring minimal standby power loss. The device meets JESD22-B106 solderability (275 °C/10 s) and JESD201 Class 2 whisker resistance, confirming suitability for automated assembly and long-term reliability in harsh thermal cycling conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	6.5 V - Maximum continuous reverse operating voltage before clamping begins; sets safe DC bias margin for 5–6 V logic or sensor supply rails.
V_BR (min/max)	7.22 V / 7.98 V at 10 mA - Confirmed breakdown threshold range ensures consistent turn-on across production lots and temperature.
V_C @ I_PPM	11.2 V at 44.7 A - Clamping voltage limits downstream IC stress during 500 W transients; clamping ratio = 1.72×V_WM.
P_PPM	500 W - Peak surge power handling per 10/1000 µs waveform; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) testing.
I_FSM	70 A - Non-repetitive forward surge rating (10 ms half-sine); protects against inrush or load-dump events in automotive 12 V systems.
T_J max	175 °C - Enables placement near heat sources (e.g., power MOSFETs) without derating in engine control units.
Qualification	AEC-Q101 qualified - Validated for automotive-grade reliability including HTOL, TC, and HAST; no additional qualification required for Tier 1 designs.

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case meeting UL 94 V-0 flammability rating. Matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band on body.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / low-side connection	Connected to ground or low-impedance return path; carries full surge current during clamping.
Cathode	Reverse-biased terminal / protected line connection	Connected to protected node (e.g., 12 V rail); blocks normal operation but avalanches during overvoltage.

Key Features

Feature	Design Value
Glass-passivated chip junction	Enables stable V_BR tolerance and long-term parameter stability under thermal cycling and humidity exposure.
500 W peak pulse power (10/1000 µs)	Supports repeated surge events per IEC 61000-4-5 without degradation; duty cycle limited to 0.01 %.
AEC-Q101 qualification	Validates reliability for automotive applications including powertrain, body electronics, and ADAS modules.
Low clamping voltage (11.2 V)	Keeps protected ICs (e.g., CAN transceivers, microcontrollers) within absolute maximum ratings during 44.7 A transients.
JESD201 Class 2 whisker resistance	Prevents tin whisker growth under high humidity and temperature stress, eliminating latent short-circuit risk in sealed enclosures.

Applications

Automotive Power Rail Protection	Industrial Sensor Interface
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Primary shunt clamp placed between battery rail and ground, responding within <1 ns to suppress transients up to ±100 V. Use Value: Limits voltage seen by downstream PMICs and MCUs to ≤11.2 V, preventing latch-up or gate oxide damage during 70 A surge events.	Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at sensor connector to absorb ESD (IEC 61000-4-2 ±8 kV contact) and inductive kickback from solenoid drivers. Use Value: Maintains signal integrity by clamping transients before they reach precision ADC inputs, with <600 µA leakage preserving 16-bit measurement accuracy.
Consumer Power Adapter Input	Telecom DC Distribution Board
Use Scenario: Secondary-side overvoltage protection in USB-C PD adapters after buck converter output stage. IC Role / Device Role / Timing Role: Standoff-rated clamp on 5–20 V output rail, activated only during fault conditions (e.g., feedback loop failure). Use Value: Prevents catastrophic failure of connected devices by limiting output to 11.2 V during sustained overvoltage, enabling safe shutdown via host controller.	Use Scenario: Surge protection on -48 V telecom backplane distribution lines feeding remote radio units. IC Role / Device Role / Timing Role: Unidirectional TVS installed at card-edge connector to divert lightning-induced surges (IEC 61000-4-5) to chassis ground. Use Value: Withstands 500 W pulses without parametric shift, ensuring uninterrupted service during field surges and reducing MTTR in base station deployments.

Automotive Power Rail Protection

Industrial Sensor Interface

Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 16750-2) and alternator ripple.

IC Role / Device Role / Timing Role: Primary shunt clamp placed between battery rail and ground, responding within <1 ns to suppress transients up to ±100 V.

Use Value: Limits voltage seen by downstream PMICs and MCUs to ≤11.2 V, preventing latch-up or gate oxide damage during 70 A surge events.

Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules.

IC Role / Device Role / Timing Role: Unidirectional TVS mounted at sensor connector to absorb ESD (IEC 61000-4-2 ±8 kV contact) and inductive kickback from solenoid drivers.

Use Value: Maintains signal integrity by clamping transients before they reach precision ADC inputs, with <600 µA leakage preserving 16-bit measurement accuracy.

Consumer Power Adapter Input

Telecom DC Distribution Board

Use Scenario: Secondary-side overvoltage protection in USB-C PD adapters after buck converter output stage.

IC Role / Device Role / Timing Role: Standoff-rated clamp on 5–20 V output rail, activated only during fault conditions (e.g., feedback loop failure).

Use Value: Prevents catastrophic failure of connected devices by limiting output to 11.2 V during sustained overvoltage, enabling safe shutdown via host controller.

Use Scenario: Surge protection on -48 V telecom backplane distribution lines feeding remote radio units.

IC Role / Device Role / Timing Role: Unidirectional TVS installed at card-edge connector to divert lightning-induced surges (IEC 61000-4-5) to chassis ground.

Use Value: Withstands 500 W pulses without parametric shift, ensuring uninterrupted service during field surges and reducing MTTR in base station deployments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ6.0AHE3/A	Lower V_WM (6.0 V), same DO-214AC package; 600 W P_PPM; slightly higher V_C (10.3 V @ 48.5 A)	Better suited for 5 V logic rails; less margin for 6.5 V nominal systems	Select when tighter V_WM tolerance is needed and 0.5 V lower standoff is acceptable.
1.5KE6.8A	Higher P_PPM (1500 W), DO-201AD package; larger footprint; V_C = 10.5 V @ 143 A	Used in high-energy industrial mains input stages; not AEC-Q101 qualified	Choose only for non-automotive applications requiring >1 kW surge handling and PCB space permits larger case.

Compared with SMAJ6.0AHE3/A and 1.5KE6.8A, the SA6.5HE3/73 offers optimal balance of AEC-Q101 compliance, compact DO-15 footprint, and precise 6.5 V standoff-making it the preferred choice for space-constrained automotive and industrial DC power protection where qualification and parametric accuracy are mandatory.

Availability

SA6.5HE3/73 is available at Aetrix Electronics and suitable for automotive ECU power rails, industrial sensor interfaces, consumer power adapter outputs, and telecom DC distribution boards requiring stable component supply and AEC-Q101 assurance.

Supply support for SA6.5HE3/73 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 SAxxA series is engineered specifically for robust transient suppression in automotive and industrial environments, targeting applications demanding AEC-Q101 validation, low clamping voltage, and stable performance across -55 °C to +175 °C.

FAQ

What is the maximum clamping voltage of the SA6.5HE3/73 under rated surge conditions?

The SA6.5HE3/73 has a maximum clamping voltage (V_C) of 11.2 V when subjected to its rated peak pulse current of 44.7 A using the standard 10/1000 µs waveform. This value is measured per Figure 7 in the Vishay datasheet 88378 and reflects worst-case clamping performance at T_A = 25 °C. The SA6.5HE3/73 maintains this clamping level consistently across production lots due to tight V_BR tolerance (7.22–7.98 V).

Is the SA6.5HE3/73 suitable for bidirectional signal line protection?

No, the SA6.5HE3/73 is a unidirectional TVS diode and must not be used on AC or bidirectional signal lines. Its cathode marking and asymmetric IV curve allow conduction only in reverse breakdown; forward conduction would occur at ~0.7–1.0 V, disrupting signal integrity. For bidirectional protection, select the SA6.5CA variant or a dedicated bi-directional TVS like SMAJ6.5CA. The SA6.5HE3/73 is intended exclusively for DC power rail and unidirectionally biased signal paths.

Does the SA6.5HE3/73 meet automotive qualification requirements?

Yes, the SA6.5HE3/73 is explicitly AEC-Q101 qualified, as confirmed in the Vishay datasheet 88378 footnote (1) and mechanical data section. The "HE3" suffix denotes RoHS-compliant, AEC-Q101-qualified construction with JESD201 Class 2 whisker resistance. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing-making the SA6.5HE3/73 suitable for engine control, body electronics, and ADAS applications without further qualification.

What is the lead finish and solderability specification for SA6.5HE3/73?

The SA6.5HE3/73 features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 for solderability, supporting wave and reflow processes. It withstands solder dip at 275 °C for up to 10 seconds per JESD 22-B106. The "HE3" suffix also confirms JESD201 Class 2 whisker resistance, critical for long-term reliability in humid, high-temperature automotive environments. These specifications are documented in the Mechanical Data section of Vishay document 88378.

How does the SA6.5HE3/73 compare to the SA6.5A-E3/54 variant?

The SA6.5HE3/73 and SA6.5A-E3/54 share identical electrical parameters and DO-204AC packaging, but differ in qualification and packaging format. SA6.5HE3/73 is AEC-Q101 qualified and supplied in 7" tape-and-reel (73), while SA6.5A-E3/54 is commercial-grade and shipped in 13" reel (54). Both meet RoHS, but only SA6.5HE3/73 carries the HE3 whisker resistance certification. For automotive designs, SA6.5HE3/73 is mandatory; for cost-sensitive industrial prototypes, SA6.5A-E3/54 may be acceptable if qualification is waived.

SA6.5HE3/73 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:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 6.5V

Voltage - Breakdown (Min):: 7.22V

Voltage - Clamping (Max) @ Ipp:: 12.3V

Current - Peak Pulse (10/1000µs):: 40.7A

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)

SA6.5HE3/73 FAQ

1.How can I place an order for SA6.5HE3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA6.5HE3/73 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 SA6.5HE3/73 reliable?

The price and inventory of SA6.5HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA6.5HE3/73 is usually 5 days.

3.What payment methods are accepted for SA6.5HE3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA6.5HE3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA6.5HE3/73?

SA6.5HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA6.5HE3/73 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 SA6.5HE3/73?

For technical support, including SA6.5HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA6.5HE3/73 requirements.

6.How does Aetrix verify that SA6.5HE3/73 is sourced from the original manufacturer or authorized distributors?

All SA6.5HE3/73 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 SA6.5HE3/73 meets industry standards.

7.What is the process for return or replacement of SA6.5HE3/73?

All SA6.5HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA6.5HE3/73, 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 SA6.5HE3/73 part is unused and in its original packaging.

Return procedure for SA6.5HE3/73:

1.Submit a request within 90 days.

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

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