My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SA75A-E3/54
- Part No.:
- SA75A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA75A-E3/54.pdf
- Description:
- TVS DIODE 75VWM 121VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,296
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SA75A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for clamping voltage transients on power and signal lines. It features 75 V stand-off voltage (VWM), 83.3–92.1 V breakdown voltage (VBR), 121 V maximum clamping voltage at 4.1 A peak pulse current, 500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA75A-E3/54 datasheet, SA75A-E3/54 pinout, SA75A-E3/54 application, or SA75A-E3/54 equivalent, this device serves as a robust overvoltage protection solution for DC power rails, sensor interfaces, and MOSFET gate drivers where fast response (<1 ns), low clamping ratio, and high surge immunity are required.
Technical Context
The SA75A-E3/54 operates as a silicon avalanche diode with glass-passivated junction, enabling sub-nanosecond response to ESD and lightning-induced transients. Its unidirectional polarity uses a cathode band marking and exhibits 3.5 V forward voltage at 100 A surge, supporting high-current transient suppression without forward conduction interference in DC-biased circuits.
Thermal performance is defined by 175 °C maximum junction temperature and 3.0 W steady-state power dissipation on infinite heatsink at 75 °C lead temperature. The device complies with JESD 22-B106 (275 °C solder dip, 10 s) and JESD 201 Class 1A whisker testing, confirming suitability for automated assembly and harsh-environment deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; sets safe DC bias margin for 48 V and 60 V industrial power rails. |
| VBR @ IT = 1.0 mA | 83.3–92.1 V - Measured breakdown range confirms tight manufacturing control; ensures predictable turn-on across temperature and unit-to-unit variation. |
| VC @ IPPM = 4.1 A | 121 V - Clamping voltage under 10/1000 µs surge; limits downstream IC stress to ≤121 V during 500 W transient events. |
| PPPM | 500 W - Peak pulse power rating per 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out. |
| IFSM | 70 A - Non-repetitive forward surge current (10 ms half-sine); enables protection of switching nodes subject to inductive kickback. |
| TJ max. | 175 °C - Maximum junction temperature; allows operation in under-hood automotive or enclosed industrial enclosures without derating below ambient. |
| Package | DO-15 (DO-204AC) - Standard axial-leaded through-hole package with 0.242–0.258 inch body length; compatible with legacy wave-solder and hand-solder processes. |
Pinout & Package
DO-15 (DO-204AC) package: axial-leaded, molded epoxy case with matte tin-plated leads. Cathode identified by color band on one end; anode is unmarked lead. Leads meet J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded lead) | Forward current entry / low-side reference | Connected to ground or lower-potential node in unidirectional clamp configuration; defines reference for clamping action. |
| Cathode (banded lead) | Reverse-biased clamping node | Connected to protected line (e.g., 48 V rail); conducts avalanche current during overvoltage to shunt energy to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable avalanche characteristics over 1000+ surge cycles and >10-year field life without parameter drift. |
| 500 W peak pulse power (10/1000 µs) | Supports full IEC 61000-4-5 surge test compliance up to 4 kV open-circuit voltage in typical PCB layouts with <10 nH inductance. |
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications including engine control units and battery management systems. |
| Low incremental clamping resistance | Clamping voltage rise of only 37.7 V above VBR (121 V – 83.3 V) at 4.1 A confirms minimal dynamic impedance for effective energy diversion. |
| Solder dip rated 275 °C / 10 s | Withstands standard wave soldering profiles without delamination or parameter shift, eliminating reflow compatibility concerns. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump and alternator surge transients up to 100 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp positive-going surges before they reach DC-DC converters and microcontrollers. Use Value: Limits voltage seen by downstream components to ≤121 V during 500 W transients, preventing latch-up or gate oxide rupture in 65 V-rated power ICs. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector entry point to suppress ±8 kV contact ESD per IEC 61000-4-2 without distorting mV-level signals. Use Value: Sub-1 ns response time and 121 V clamping ensure sensor signal integrity remains intact during fast transients, avoiding false readings or ADC saturation. |
| MOSFET Gate Driver Protection | Telecom DC Power Feeding |
Use Scenario: Safeguarding high-side N-channel MOSFET gates driven by isolated PWM controllers in motor drives. IC Role / Device Role / Timing Role: TVS connected between gate and source to clamp Miller-induced voltage spikes during fast switching transitions. Use Value: 75 V VWM provides sufficient margin above 24 V gate drive supply while 121 V VC prevents gate oxide breakdown during 100 ns dv/dt events. |
Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras, wireless APs) fed via 48–57 V DC from induced surges on long Ethernet runs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on PSE-side DC feed line, coordinated with secondary TVS on PD side for cascaded protection. Use Value: 500 W rating handles IEEE 802.3bt-compliant surge tests; DO-15 package allows direct integration into compact inline surge modules without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ75A | Same DO-214AC (SMA) package; 75 V VWM, 121 V VC @ 4.1 A, but rated for 400 W (10/1000 µs) vs. 500 W. | Lower peak power requires larger layout margin or parallel placement for equivalent surge handling; not AEC-Q101 qualified. | Select when space-constrained SMT layout is mandatory and 400 W suffices; verify thermal relief pad design for sustained surge duty. |
| ON Semiconductor 1.5KE75A | DO-201AD package; identical 75 V VWM, 121 V VC, 500 W rating, but higher 1.5 kW peak power capability (10/1000 µs) and 100 A IFSM. | Larger package increases board area; higher IFSM supports heavier inductive loads but adds cost and thermal mass. | Choose for legacy designs already using DO-201AD footprints or where 100 A surge margin is critical for transformer-coupled AC/DC inputs. |
Compared with SMAJ75A and 1.5KE75A, the SA75A-E3/54 delivers identical clamping performance in a smaller DO-15 footprint with AEC-Q101 validation-making it optimal for new automotive and space-constrained industrial designs requiring proven reliability and through-hole assembly compatibility.
Availability
SA75A-E3/54 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and telecom DC feeding applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SA75A-E3/54 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 passive components with emphasis on reliability, precision, and automotive-grade qualification.
The SAxxA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust, standardized overvoltage protection in automotive, industrial, and telecom infrastructure where repeatable clamping behavior and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum clamping voltage of the SA75A-E3/54 under surge conditions?
The SA75A-E3/54 has a maximum clamping voltage (VC) of 121 V when subjected to its rated peak pulse current of 4.1 A using the standard 10/1000 µs waveform. This value is measured per Figure 7 in the Vishay datasheet 88378 and represents the upper limit of voltage imposed on protected circuitry during transient events, ensuring downstream components remain within safe operating limits.
Is the SA75A-E3/54 suitable for automotive applications?
Yes, the SA75A-E3/54 is AEC-Q101 qualified and explicitly listed in Vishay's documentation as meeting automotive reliability requirements. Its construction-including glass-passivated junction, 175 °C maximum junction temperature, and JESD 201 Class 1A whisker resistance-supports deployment in engine control units, body electronics, and battery management systems where extended temperature cycling and long-term stability are critical.
What does the "E3/54" suffix indicate in SA75A-E3/54?
The "E3" suffix denotes RoHS-compliant, commercial-grade packaging with matte tin-plated leads meeting J-STD-002 solderability and JESD 201 Class 1A whisker resistance. The "/54" indicates the preferred package code for 13-inch paper tape and reel delivery, with a base quantity of 4000 units per reel-standard for automated SMT placement despite the DO-15 through-hole form factor.
How does the SA75A-E3/54 compare to bidirectional TVS diodes like SA75CA?
The SA75A-E3/54 is unidirectional and features a cathode band for polarity identification, making it ideal for DC-biased lines where only positive-going transients require suppression. In contrast, SA75CA is bidirectional with no polarity marking and symmetric clamping in both directions-used in AC-coupled or floating signal paths. Their VWM, VBR, and VC values differ slightly due to internal structure, so direct substitution is not recommended without circuit review.
What is the thermal derating behavior of the SA75A-E3/54 above 25 °C ambient?
The SA75A-E3/54 follows Vishay's standard derating curve (Figure 2 in datasheet 88378): peak pulse power remains at 100% up to 25 °C ambient, then linearly decreases to ~50% at 125 °C and reaches zero at 175 °C junction temperature. For steady-state power, Figure 5 shows 3.0 W derates to 0 W at 175 °C lead temperature-requiring appropriate PCB copper area or heatsinking for continuous operation above 75 °C.
SA75A-E3/54 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA75A-E3/54 FAQ
1.How can I place an order for SA75A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA75A-E3/54 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 SA75A-E3/54 reliable?
The price and inventory of SA75A-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA75A-E3/54 is usually 5 days.
3.What payment methods are accepted for SA75A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA75A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA75A-E3/54?
SA75A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA75A-E3/54 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 SA75A-E3/54?
For technical support, including SA75A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA75A-E3/54 requirements.
6.How does Aetrix verify that SA75A-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA75A-E3/54 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 SA75A-E3/54 meets industry standards.
7.What is the process for return or replacement of SA75A-E3/54?
All SA75A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA75A-E3/54, 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 SA75A-E3/54 part is unused and in its original packaging.
Return procedure for SA75A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA75A-E3/54 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
