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Vishay General Semiconductor - Diodes Division SA75AHE3/54
- Part No.:
- SA75AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA75AHE3/54.pdf
- Description:
- TVS DIODE 75VWM 121VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,466
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Product details
Overview
SA75AHE3/54 from Vishay General Semiconductor is a unidirectional TransZORB® transient voltage suppressor (TVS) diode in DO-15 package, rated for 75 V standoff voltage (VWM), 83.3–92.1 V breakdown voltage (VBR), 121 V clamping voltage at 4.1 A peak pulse current, and 500 W peak pulse power with 10/1000 μs waveform. It protects MOSFETs and ICs against inductive switching transients in automotive power supplies.
For engineers reviewing the SA75AHE3/54 datasheet, SA75AHE3/54 pinout, SA75AHE3/54 application, or SA75AHE3/54 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-15 mechanical data, clamping performance under standardized surge conditions, and direct alternatives for circuit protection design-in.
Technical Context
The SA75AHE3/54 operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to ESD and lightning-induced surges. Its 121 V clamping voltage at 4.1 A IPPM ensures reliable overvoltage limiting during 10/1000 μs transients while maintaining low incremental surge resistance.
Designed for AEC-Q101 qualification, it supports automotive-grade reliability with operating junction temperature up to +175 °C, matte tin-plated leads compliant with J-STD-002, and JESD 201 Class 2 whisker resistance. The device exhibits a +91 mV/°C breakdown voltage temperature coefficient, enabling predictable thermal drift in under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 75 V - Maximum continuous reverse voltage before conduction begins; sets threshold for normal operation without leakage. |
| VBR (Breakdown Voltage) | 83.3–92.1 V at 1.0 mA - Confirmed avalanche onset range; defines precise clamping initiation point. |
| VC (Clamping Voltage) | 121 V at IPPM = 4.1 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 500 W - Sustained energy absorption capability under standard 10/1000 μs waveform; validates robustness against repetitive transients. |
| ID (Reverse Leakage) | 1.0 μA max at VWM - Ultra-low leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max | +175 °C - Enables deployment in engine control units and powertrain modules where ambient temperatures exceed 125 °C. |
| AEC-Q101 Qualified | Yes - Certified for automotive applications per stress test requirements including HTOL, TC, UHAST, and ESD-HBM/MM. |
Pinout & Package
DO-15 (DO-204AC) molded epoxy package with axial leads; cathode indicated by color band on one end. Matte tin-plated terminals ensure solderability per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; carries full surge current during clamping event. |
| Cathode | Protected line connection / Clamping node | Connected to line being protected (e.g., 12 V rail); voltage referenced to anode during avalanche conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable avalanche characteristics and long-term reliability under thermal cycling and humidity exposure. |
| 500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-earth) in compact DO-15 footprint. |
| AEC-Q101 qualified | Validates suitability for automotive power distribution, body control modules, and ADAS sensor interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage margin between breakdown and clamping, improving protection headroom for 75 V systems. |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under high-temperature/humidity bias, critical for long-life automotive deployments. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed microcontroller power rails in engine control units from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND to clamp positive transients above 75 V while blocking reverse conduction. Use Value: Limits peak rail voltage to ≤121 V during 500 W surges, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies. | Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to field wiring induced transients. IC Role / Device Role / Timing Role: Front-end suppression element on 24 V DC inputs, shunting surge energy before optocoupler or level-shifter stages. Use Value: Maintains <1.0 μA leakage at 24 V nominal, ensuring clean signal detection while clamping 10/1000 μs spikes to safe levels. |
| DC Motor Drive Flyback Suppression | Telecom Power Interface Protection |
Use Scenario: Absorbing inductive kickback from brushed DC motors in automotive seat/mirror actuators. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to clamp reverse EMF during MOSFET turn-off. Use Value: Withstands 70 A non-repetitive forward surge (IFSM), surviving repeated commutation events without degradation. | Use Scenario: Shielding 48 V PoE-powered telecom equipment front-ends from lightning-induced surges on Ethernet lines. IC Role / Device Role / Timing Role: Primary-level transient suppressor on DC input side of isolated DC/DC converters. Use Value: Delivers 500 W pulse handling with UL 94 V-0 rated epoxy housing, meeting IEC 61000-4-5 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75A-E3/5A | Same VWM (75 V), lower PPPM (400 W), SMA package (surface-mount) | Requires PCB rework for SMT layout; lacks AEC-Q101 qualification | Select when board space is constrained and automotive qualification is not required. |
| 1.5KE75A | Higher VBR (83.3–92.1 V same), identical DO-15 package, but only commercial grade (not AEC-Q101) | Not validated for automotive temperature cycling or humidity testing | Choose for cost-sensitive industrial designs where extended temperature reliability is not mandated. |
Compared with SMAJ75A-E3/5A and 1.5KE75A, the SA75AHE3/54 uniquely combines AEC-Q101 qualification, 500 W surge rating, and DO-15 through-hole compatibility-making it the preferred choice for automotive production programs requiring traceable, high-reliability transient suppression without layout change.
Availability
SA75AHE3/54 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC input conditioning, and DC motor drive flyback suppression requiring stable component supply and full AEC-Q101 compliance.
Supply support for SA75AHE3/54 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 SAxxA series is part of Vishay's TransZORB® TVS platform designed specifically for robust, high-energy transient suppression in harsh environments-including under-hood automotive, industrial automation, and telecom infrastructure.
FAQ
What is the clamping voltage of the SA75AHE3/54 under a 10/1000 μs surge?
The SA75AHE3/54 has a maximum clamping voltage (VC) of 121 V at 4.1 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per Figure 7 in the Vishay datasheet 88378 and defines the upper voltage limit imposed on protected circuits during surge events. The SA75AHE3/54 maintains this clamping performance across its qualified operating temperature range.
Is the SA75AHE3/54 suitable for automotive applications?
Yes, the SA75AHE3/54 is AEC-Q101 qualified per note (1) on page 3 of Vishay document 88378. It undergoes stress testing including high-temperature operating life, temperature cycling, and unbiased HAST, confirming suitability for automotive powertrain, body electronics, and ADAS subsystems. The HE3 suffix explicitly denotes AEC-Q101 qualification and JESD 201 Class 2 whisker resistance.
What does the "HE3/54" suffix mean in SA75AHE3/54?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; "54" refers to the preferred package code for 13-inch paper tape and reel packaging with 4000 units per reel. This ordering format aligns with Vishay's standard nomenclature shown in the "Ordering Information" section of datasheet 88378.
How does the SA75AHE3/54 differ from bidirectional variants like SA75CA?
The SA75AHE3/54 is unidirectional, featuring a cathode band and conducting only in reverse bias above VBR; SA75CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. Their VWM (75 V), VBR (83.3–92.1 V), and VC (121 V) match, but SA75AHE3/54 must be oriented correctly in-circuit, whereas SA75CA simplifies placement in AC-coupled or floating signal paths.
What is the maximum operating temperature for the SA75AHE3/54?
The SA75AHE3/54 has a maximum junction temperature (TJ max) of +175 °C, as specified in the "Maximum Ratings" table on page 1 of Vishay datasheet 88378. This enables use in high-ambient environments such as engine compartments, power inverters, and industrial motor drives where thermal management is challenging.
SA75AHE3/54 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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 4.1A
- 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)
SA75AHE3/54 FAQ
1.How can I place an order for SA75AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA75AHE3/54 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 SA75AHE3/54 reliable?
The price and inventory of SA75AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA75AHE3/54 is usually 5 days.
3.What payment methods are accepted for SA75AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA75AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA75AHE3/54?
SA75AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA75AHE3/54 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 SA75AHE3/54?
For technical support, including SA75AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA75AHE3/54 requirements.
6.How does Aetrix verify that SA75AHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA75AHE3/54 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 SA75AHE3/54 meets industry standards.
7.What is the process for return or replacement of SA75AHE3/54?
All SA75AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA75AHE3/54, 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 SA75AHE3/54 part is unused and in its original packaging.
Return procedure for SA75AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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