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

Vishay General Semiconductor - Diodes Division SA6.5CAHE3/54

Name: SA6.5CAHE3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA6.5CAHE3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA6.5CAHE3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA6.5CAHE3/54.pdf

Description:: TVS DIODE 6.5VWM 11.2VC DO204AC

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Product details

Overview

SA6.5CAHE3/54 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 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), 44.7 V clamping voltage at 400 A peak pulse current, and AEC-Q101 qualification for automotive use.

For engineers reviewing the SA6.5CAHE3/54 datasheet, SA6.5CAHE3/54 pinout, SA6.5CAHE3/54 application, or SA6.5CAHE3/54 equivalent, key selection criteria include bidirectional clamping capability, DO-15 mechanical compatibility, 175 °C max junction temperature, low incremental surge resistance, and compliance with IEC 61000-4-2/4-4/4-5 ESD/surge immunity standards.

Technical Context

The SA6.5CAHE3/54 operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients above its breakdown threshold. Its glass-passivated junction ensures stable V_BR tolerance (±5 %) and low leakage (<1 μA at 6.5 V), while the DO-15 package supports lead-free soldering per J-STD-002 and JESD 22-B102.

Designed for repetitive surge suppression, it delivers 500 W peak pulse power under 10/1000 μs waveform with 0.01 % duty cycle, and derates linearly above 25 °C ambient per Fig. 2. Its 175 °C maximum junction temperature enables operation in under-hood automotive environments without thermal derating penalties.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	6.5 V - Maximum continuous reverse operating voltage before clamping begins
V_BR (min/max)	7.22 V / 7.98 V at 10 mA - Ensures reliable turn-on within tight tolerance for consistent protection margin
V_C @ I_PPM	44.7 V at 400 A - Clamped voltage during worst-case 10/1000 μs surge, limiting downstream IC stress
P_PPM	500 W - Sustains high-energy transients from inductive switching or lightning-induced surges
T_J max	+175 °C - Enables deployment in engine control units and powertrain modules without external heatsinking
Qualification	AEC-Q101 qualified - Validated for automotive-grade reliability including temperature cycling and HTRB
Package	DO-15 (DO-204AC) - Industry-standard axial-leaded package compatible with legacy PCB layouts and wave-solder processes

Pinout & Package

DO-15 (DO-204AC) package: axial-leaded, molded epoxy body, matte tin-plated leads, no polarity marking (bidirectional device).

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (unmarked)	Bidirectional avalanche junction	Identical clamping behavior for ± polarity transients; no cathode band required
Lead 1	Terminal A	Electrically interchangeable with Lead 2; symmetrical connection for board layout flexibility
Lead 2	Terminal B	Supports mounting in either orientation; eliminates assembly orientation checks

Key Features

Feature	Design Value
Glass-passivated chip junction	Ensures long-term V_BR stability and low parameter drift over 15+ year automotive service life
500 W peak pulse power (10/1000 μs)	Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges without degradation
AEC-Q101 qualification	Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces
Low incremental surge resistance	Minimizes V_C overshoot during fast-rising transients (e.g., >1 kV/μs ESD events)
UL 94 V-0 molding compound	Meets flammability requirements for enclosed automotive and industrial enclosures

Applications

Automotive Power Line Protection	Industrial Sensor Interface Protection
Use Scenario: Protecting LIN bus or 12 V power rail in door module ECUs from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed upstream of LDOs and CAN/LIN transceivers. Use Value: Limits transient voltage to <45 V, preventing latch-up or gate oxide damage in 3.3 V/5 V logic downstream.	Use Scenario: Safeguarding analog outputs of pressure or temperature sensors in PLC I/O modules exposed to relay coil flyback. IC Role / Device Role / Timing Role: Primary surge shunt across sensor output pins to ground or supply rail. Use Value: Clamps 400 A surges within 1 ns response time, preserving ±0.1 % measurement accuracy over 10-year field life.
Telecom Line Card Surge Suppression	Consumer Appliance Motor Drive Protection
Use Scenario: Front-end protection for Ethernet PHY power rails in VoIP gateways subjected to lightning-induced surges on PoE lines. IC Role / Device Role / Timing Role: Secondary-level TVS after gas discharge tube (GDT), handling residual energy. Use Value: Absorbs 500 W pulses without parametric shift, maintaining IEEE 802.3af compliance after repeated strikes.	Use Scenario: Suppressing commutation spikes from universal motor brushes in washing machine control boards. IC Role / Device Role / Timing Role: Parallel-mounted across motor terminals to clamp inductive kickback. Use Value: Withstands 70 A non-repetitive forward surge (IFSM), eliminating need for series fusing in Class II appliances.

Automotive Power Line Protection

Industrial Sensor Interface Protection

Use Scenario: Protecting LIN bus or 12 V power rail in door module ECUs from load dump and alternator ripple.

IC Role / Device Role / Timing Role: Bidirectional clamping element placed upstream of LDOs and CAN/LIN transceivers.

Use Value: Limits transient voltage to <45 V, preventing latch-up or gate oxide damage in 3.3 V/5 V logic downstream.

Use Scenario: Safeguarding analog outputs of pressure or temperature sensors in PLC I/O modules exposed to relay coil flyback.

IC Role / Device Role / Timing Role: Primary surge shunt across sensor output pins to ground or supply rail.

Use Value: Clamps 400 A surges within 1 ns response time, preserving ±0.1 % measurement accuracy over 10-year field life.

Telecom Line Card Surge Suppression

Consumer Appliance Motor Drive Protection

Use Scenario: Front-end protection for Ethernet PHY power rails in VoIP gateways subjected to lightning-induced surges on PoE lines.

IC Role / Device Role / Timing Role: Secondary-level TVS after gas discharge tube (GDT), handling residual energy.

Use Value: Absorbs 500 W pulses without parametric shift, maintaining IEEE 802.3af compliance after repeated strikes.

Use Scenario: Suppressing commutation spikes from universal motor brushes in washing machine control boards.

IC Role / Device Role / Timing Role: Parallel-mounted across motor terminals to clamp inductive kickback.

Use Value: Withstands 70 A non-repetitive forward surge (IFSM), eliminating need for series fusing in Class II appliances.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ6.5CA	Same V_WM/V_BR/P_PPM, but SMA package (surface-mount); lower I_PPM (36.8 A vs. 400 A)	Requires PCB redesign for SMT placement; unsuitable for high-current line protection	Select SMAJ6.5CA only when board space is constrained and surge currents remain below 40 A
P6KE6.8CA	Higher V_WM (6.8 V), same DO-15 package, 500 W rating, but older design with wider V_BR tolerance (±10 %)	Lacks AEC-Q101 qualification; not recommended for new automotive designs	Choose P6KE6.8CA only for cost-sensitive industrial replacements where AEC-Q101 is not mandated

Compared with SMAJ6.5CA and P6KE6.8CA, the SA6.5CAHE3/54 uniquely combines AEC-Q101 qualification, DO-15 through-hole compatibility, and 400 A peak pulse current handling-making it the preferred choice for automotive and high-reliability industrial surge protection where mechanical robustness and qualification traceability are mandatory.

Availability

SA6.5CAHE3/54 is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface protection, and telecom line card surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for SA6.5CAHE3/54 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, and protection devices with emphasis on reliability, efficiency, and automotive-grade validation.

The SAxxCA series targets high-energy transient suppression in harsh environments, with design focus on AEC-Q101 compliance, low clamping voltage, and robust surge endurance for power and signal line protection.

FAQ

What is the clamping voltage of the SA6.5CAHE3/54 at its rated peak pulse current?

The SA6.5CAHE3/54 has a maximum clamping voltage (V_C) of 44.7 V at 400 A peak pulse current (I_PPM) under a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Doc. #88378, Rev. 27-Sep-2021) and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SA6.5CAHE3/54 maintains this clamping performance across its full operating temperature range.

Is the SA6.5CAHE3/54 suitable for automotive applications?

Yes, the SA6.5CAHE3/54 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its 175 °C maximum junction temperature, glass-passivated junction, and DO-15 mechanical robustness meet requirements for engine control units, body control modules, and ADAS sensor interfaces. The HE3 suffix confirms AEC-Q101 qualification per Vishay's ordering nomenclature in Document 88378.

Does the SA6.5CAHE3/54 have polarity markings on the package?

No, the SA6.5CAHE3/54 does not feature a cathode band or other polarity marking because it is a bidirectional TVS diode. Both leads are functionally identical, allowing installation in either orientation on the PCB. This symmetry simplifies assembly and eliminates orientation-related defects in high-volume manufacturing.

What is the maximum steady-state power dissipation for the SA6.5CAHE3/54?

The SA6.5CAHE3/54 has a maximum steady-state power dissipation (P_D) of 3.0 W when mounted on an infinite heatsink at lead temperature (T_L) = 75 °C, as specified in the "Maximum Ratings" table of Vishay Document 88378. This rating applies to continuous DC or low-frequency reverse leakage conditions-not transient suppression-and must be derated linearly above 75 °C per the curve in Figure 5.

How does the SA6.5CAHE3/54 differ from unidirectional SA6.5A variants?

The SA6.5CAHE3/54 is bidirectional with symmetrical clamping for both polarities, while the unidirectional SA6.5A clamps only in reverse bias and conducts forward current like a rectifier. The CA variant has no cathode marking, supports AC-coupled signal lines, and is used where transients may swing positive or negative-such as data lines or transformer-coupled interfaces. The SA6.5CAHE3/54 also shares identical V_WM, V_BR, and P_PPM ratings with its unidirectional counterpart but differs in polarity behavior and application scope.

SA6.5CAHE3/54 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):: 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:: -

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)

SA6.5CAHE3/54 FAQ

1.How can I place an order for SA6.5CAHE3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA6.5CAHE3/54 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 SA6.5CAHE3/54 reliable?

The price and inventory of SA6.5CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA6.5CAHE3/54 is usually 5 days.

3.What payment methods are accepted for SA6.5CAHE3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA6.5CAHE3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA6.5CAHE3/54?

SA6.5CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA6.5CAHE3/54 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 SA6.5CAHE3/54?

For technical support, including SA6.5CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA6.5CAHE3/54 requirements.

6.How does Aetrix verify that SA6.5CAHE3/54 is sourced from the original manufacturer or authorized distributors?

All SA6.5CAHE3/54 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 SA6.5CAHE3/54 meets industry standards.

7.What is the process for return or replacement of SA6.5CAHE3/54?

All SA6.5CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA6.5CAHE3/54, 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 SA6.5CAHE3/54 part is unused and in its original packaging.

Return procedure for SA6.5CAHE3/54:

1.Submit a request within 90 days.

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

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