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

Vishay General Semiconductor - Diodes Division SA7.0AHE3/54

Name: SA7.0AHE3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA7.0AHE3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA7.0AHE3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA7.0AHE3/54.pdf

Description:: TVS DIODE 7VWM 12VC DO204AC

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Product details

Overview

SA7.0AHE3/54 from Vishay General Semiconductor is a unidirectional TransZORB® transient voltage suppressor diode in DO-15 package, designed for clamping inductive switching transients and ESD events. It features 7.0 V stand-off voltage (V_WM), 7.78–8.60 V breakdown voltage (V_BR) at 10 mA, 41.7 A peak pulse current (I_PPM) under 10/1000 µs waveform, 12.0 V clamping voltage (V_C) at I_PPM, and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the SA7.0AHE3/54 datasheet, SA7.0AHE3/54 pinout, SA7.0AHE3/54 application, or SA7.0AHE3/54 equivalent, this device serves as a primary overvoltage protection component on power rails and signal lines in automotive ECUs, industrial sensor interfaces, and DC power input stages where fast response (<1 ns), low clamping ratio, and high surge robustness are required.

Technical Context

The SA7.0AHE3/54 operates as a silicon avalanche diode with glass-passivated junction, optimized for unidirectional clamping in circuits where reverse polarity is controlled. Its 500 W peak pulse power rating (10/1000 µs) and 3.0 W steady-state dissipation enable sustained transient suppression without thermal runaway under repetitive surges.

With a maximum junction temperature of +175 °C, 175 °C storage range, and JESD22-B102-compliant matte tin-plated leads, it supports high-reliability mounting in harsh environments. The 6 mV/°C temperature coefficient of V_BR ensures stable breakdown behavior across automotive temperature ranges.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	7.0 V - Maximum continuous reverse operating voltage before significant leakage; sets safe margin below system rail (e.g., 9 V battery systems)
V_BR @ 10 mA	7.78–8.60 V - Confirmed breakdown threshold defining clamping onset; tight 10.5% tolerance enables predictable protection window
V_C @ I_PPM	12.0 V - Clamped voltage during 41.7 A transient; limits downstream IC stress to ≤12 V under worst-case surge
I_PPM	41.7 A - Peak surge current capability with 10/1000 µs waveform; sufficient for ISO 7637-2 Pulse 1/2a/5a compliance testing
P_PPM	500 W - Peak pulse power handling; defines energy absorption capacity per transient event without failure
T_J max.	+175 °C - Maximum junction temperature; supports operation in under-hood automotive locations and industrial enclosures
AEC-Q101	Qualified - Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD

Pinout & Package

Package: DO-15 (DO-204AC), axial-leaded, molded epoxy case with UL 94 V-0 rating. Cathode indicated by color band on body end.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connected to lower-potential side (e.g., GND or return path); conducts during forward surge or bias conditions
Cathode	Clamping reference terminal	Marked end; connected to protected line (e.g., 12 V rail); avalanches into conduction when reverse voltage exceeds V_BR

Key Features

Feature	Design Value
Glass-passivated junction	Enables stable, low-noise avalanche performance and long-term reliability under repeated surge stress
500 W peak pulse power (10/1000 µs)	Supports high-energy transients common in automotive load-dump and inductive switch-off scenarios
AEC-Q101 qualification	Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-defect reliability
Low incremental clamping resistance	Minimizes V_C – V_BR differential (ΔV = 4.2 V), reducing voltage overshoot during fast-rising transients
Matte tin-plated leads	Ensures solderability per J-STD-002 and whisker resistance per JESD201 Class 2 (HE3 suffix)

Applications

Automotive Power Input Protection	Industrial Sensor Signal Line Clamp
Use Scenario: Protecting 12 V supply inputs in engine control units against ISO 7637-2 load dump pulses and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤12.0 V, preventing damage to upstream regulators and microcontrollers rated for 16 V absolute max.	Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and cable discharge events in factory automation sensors. IC Role / Device Role / Timing Role: Standoff-clamp TVS mounted at connector interface, shunting surge energy to ground. Use Value: Responds in <1 ns to clamp 8 kV contact ESD (IEC 61000-4-2) while adding <0.5 pF parasitic capacitance-no signal integrity impact.
Consumer DC Adapter Surge Suppression	Telecom Power Interface Protection
Use Scenario: Safeguarding USB-C PD and barrel-jack inputs in smart home hubs against AC line coupling and lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level unidirectional clamping device on DC input before fuse and filter stage. Use Value: Absorbs 500 W single-event surges without degradation, maintaining V_WM = 7.0 V to avoid false triggering on 9 V nominal adapters.	Use Scenario: Protecting PoE-powered devices (e.g., IP cameras) from induced surges on Ethernet data pairs and auxiliary power lines. IC Role / Device Role / Timing Role: Secondary-stage TVS on 48 V DC input rail, coordinated with primary gas discharge tube (GDT). Use Value: Provides precise low-V_C clamping (12.0 V) to prevent latch-up in PMICs while surviving 41.7 A surge per IEEE 802.3bt surge test profiles.

Automotive Power Input Protection

Industrial Sensor Signal Line Clamp

Use Scenario: Protecting 12 V supply inputs in engine control units against ISO 7637-2 load dump pulses and alternator ripple.

IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and DC-DC converter input.

Use Value: Limits transient voltage to ≤12.0 V, preventing damage to upstream regulators and microcontrollers rated for 16 V absolute max.

Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and cable discharge events in factory automation sensors.

IC Role / Device Role / Timing Role: Standoff-clamp TVS mounted at connector interface, shunting surge energy to ground.

Use Value: Responds in <1 ns to clamp 8 kV contact ESD (IEC 61000-4-2) while adding <0.5 pF parasitic capacitance-no signal integrity impact.

Consumer DC Adapter Surge Suppression

Telecom Power Interface Protection

Use Scenario: Safeguarding USB-C PD and barrel-jack inputs in smart home hubs against AC line coupling and lightning-induced surges.

IC Role / Device Role / Timing Role: Primary-level unidirectional clamping device on DC input before fuse and filter stage.

Use Value: Absorbs 500 W single-event surges without degradation, maintaining V_WM = 7.0 V to avoid false triggering on 9 V nominal adapters.

Use Scenario: Protecting PoE-powered devices (e.g., IP cameras) from induced surges on Ethernet data pairs and auxiliary power lines.

IC Role / Device Role / Timing Role: Secondary-stage TVS on 48 V DC input rail, coordinated with primary gas discharge tube (GDT).

Use Value: Provides precise low-V_C clamping (12.0 V) to prevent latch-up in PMICs while surviving 41.7 A surge per IEEE 802.3bt surge test profiles.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ7.0A	Same V_WM (7.0 V), but SMA package (surface-mount); 400 W P_PPM; slightly higher V_C (12.5 V)	Requires PCB rework for SMT layout; better suited for space-constrained consumer designs	Select SMAJ7.0A only if board real estate is limited and thermal management allows lower P_PPM.
1.5KE7.0A	Higher P_PPM (1500 W), DO-201 package; larger footprint; V_C = 12.0 V same; not AEC-Q101 qualified	Used in industrial power supplies where size is secondary to energy handling; lacks automotive qualification	Choose 1.5KE7.0A for non-automotive high-energy applications where AEC-Q101 is not required.

Compared with SMAJ7.0A and 1.5KE7.0A, the SA7.0AHE3/54 uniquely combines AEC-Q101 qualification, DO-15 through-hole compatibility, and precise 12.0 V clamping-making it the preferred choice for automotive and industrial through-hole designs requiring certified reliability and proven surge margin.

Availability

SA7.0AHE3/54 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom DC power input stages requiring stable component supply and long-term lifecycle support.

Supply support for SA7.0AHE3/54 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 protection devices with emphasis on reliability, efficiency, and application-specific optimization.

The SA7.0AHE3/54 belongs to Vishay's TransZORB® TVS family, engineered specifically for robust, low-clamping overvoltage protection in automotive, industrial, and communications infrastructure where repeatable surge immunity and AEC-Q101 validation are mandatory.

FAQ

What is the clamping voltage of the SA7.0AHE3/54 under peak surge conditions?

The SA7.0AHE3/54 has a maximum clamping voltage (V_C) of 12.0 V at its rated peak pulse current (I_PPM) of 41.7 A using the standard 10/1000 µs waveform. This value is measured per JEDEC standards and ensures downstream components see no more than 12.0 V during transient events, critical for protecting 12 V-rated ICs and regulators in automotive and industrial systems. The SA7.0AHE3/54 maintains this clamping performance across its full operating temperature range.

Is the SA7.0AHE3/54 suitable for automotive applications?

Yes, the SA7.0AHE3/54 is AEC-Q101 qualified, meaning it has passed rigorous stress tests-including high-temperature operating life, temperature cycling, and ESD-required for automotive electronics. Its DO-15 package, +175 °C max junction temperature, and HE3 suffix (JESD201 Class 2 whisker resistance) confirm its suitability for under-hood and chassis-mounted modules. The SA7.0AHE3/54 is widely deployed in automotive body control units, infotainment power supplies, and ADAS sensor interfaces.

How does the SA7.0AHE3/54 differ from bidirectional TVS diodes like SA7.0CA?

The SA7.0AHE3/54 is unidirectional and features a cathode band for polarity-sensitive placement, enabling use in DC circuits where reverse voltage must be blocked. In contrast, SA7.0CA is bidirectional with no polarity marking and symmetric clamping in both directions-used in AC-coupled or floating signal lines. The SA7.0AHE3/54 offers tighter V_BR tolerance (7.78–8.60 V) and is AEC-Q101 qualified, whereas SA7.0CA variants may lack that certification depending on suffix. Both share identical V_WM and P_PPM, but circuit topology dictates selection.

What is the meaning of the "HE3/54" suffix in SA7.0AHE3/54?

The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance; "54" denotes the preferred packaging code for 13-inch paper tape and reel, with 4000 units per reel. This distinguishes it from commercial-grade "E3" versions (e.g., SA7.0A-E3/54), which lack automotive qualification. The SA7.0AHE3/54 is traceable to Vishay's qualified manufacturing lots and meets automotive PPAP documentation requirements.

Can the SA7.0AHE3/54 be used in parallel for higher surge current handling?

No-parallel connection of SA7.0AHE3/54 devices is not recommended due to mismatched avalanche characteristics causing current imbalance and potential single-device failure. For higher surge ratings, select a higher-power TVS (e.g., 1.5KE7.0A) or implement staged protection (GDT + TVS). The SA7.0AHE3/54 is characterized and tested as a single-device solution; its 41.7 A I_PPM and 500 W P_PPM are validated per JEDEC test conditions and must not be extrapolated via paralleling.

SA7.0AHE3/54 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:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 7V

Voltage - Breakdown (Min):: 7.78V

Voltage - Clamping (Max) @ Ipp:: 12V

Current - Peak Pulse (10/1000µs):: 41.7A

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)

SA7.0AHE3/54 FAQ

1.How can I place an order for SA7.0AHE3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA7.0AHE3/54 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 SA7.0AHE3/54 reliable?

The price and inventory of SA7.0AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7.0AHE3/54 is usually 5 days.

3.What payment methods are accepted for SA7.0AHE3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7.0AHE3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA7.0AHE3/54?

SA7.0AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA7.0AHE3/54 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 SA7.0AHE3/54?

For technical support, including SA7.0AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7.0AHE3/54 requirements.

6.How does Aetrix verify that SA7.0AHE3/54 is sourced from the original manufacturer or authorized distributors?

All SA7.0AHE3/54 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 SA7.0AHE3/54 meets industry standards.

7.What is the process for return or replacement of SA7.0AHE3/54?

All SA7.0AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA7.0AHE3/54, 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 SA7.0AHE3/54 part is unused and in its original packaging.

Return procedure for SA7.0AHE3/54:

1.Submit a request within 90 days.

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

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