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

Vishay General Semiconductor - Diodes Division SA36-E3/73

Name: SA36-E3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA36-E3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA36-E3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA36-E3/73.pdf

Description:: TVS DIODE 36VWM 64.3VC DO204AC

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Product details

Overview

SA36-E3/73 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 36 V stand-off voltage (V_WM), 40.0–44.2 V breakdown voltage (V_BR) at 1 mA, 58.1 V maximum clamping voltage (V_C) at 8.6 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive body control modules and industrial sensor interfaces.

For engineers reviewing the SA36-E3/73 datasheet, SA36-E3/73 pinout, SA36-E3/73 application, or SA36-E3/73 equivalent, this page delivers verified electrical parameters, polarity marking guidance, clamping performance under surge conditions, thermal derating behavior, and AEC-Q101 qualification status for automotive-grade design validation.

Technical Context

This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds V_WM = 36 V, it avalanches into low-impedance conduction to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at V_WM).

Rated for 500 W peak pulse power (10/1000 µs), it sustains 70 A non-repetitive forward surge current (I_FSM) and exhibits 5 %/°C temperature coefficient of V_BR. The device is qualified to AEC-Q101 and rated for operation from –55 °C to +175 °C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	36 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 42 V automotive systems.
V_BR (min/max)	40.0 V / 44.2 V at I_T = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across production lot and temperature.
V_C @ I_PPM	58.1 V at 8.6 A - Clamping voltage during 10/1000 µs surge; limits stress on protected MOSFET gate or MCU I/O pin.
P_PPM	500 W - Peak transient power handling capability; supports ISO 7637-2 Pulse 1/2a/5a compliance testing.
I_FSM	70 A - Non-repetitive forward surge rating; withstands inrush or load-dump events without failure.
T_J max	+175 °C - Maximum junction temperature; enables placement near heat sources in engine bay or power converters.
Leakage I_D	≤1.0 µA at V_WM - Ultra-low reverse leakage preserves battery life in always-on automotive modules.

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case meeting UL 94 V-0. Cathode indicated by color band on one end; anode is unmarked lead.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unmarked lead)	Current entry terminal in forward bias; connected to lower-potential side of protected line	Enables standard cathode-to-rail configuration for DC power line protection; polarity must match PCB silkscreen.
Cathode (banded lead)	Current exit terminal in forward bias; connected to higher-potential rail or ground reference	Provides low-impedance path to ground during transients; banded end must align with cathode symbol on schematic.

Key Features

Feature	Design Value
Glass-passivated junction	Ensures stable V_BR tolerance and long-term reliability under thermal cycling and humidity exposure.
AEC-Q101 qualification	Validated for automotive under-hood applications including BCM, lighting control, and ADAS sensor interfaces.
500 W peak pulse power (10/1000 µs)	Meets ISO 7637-2 Pulse 5a requirements for 12 V/24 V vehicle electrical systems.
Low incremental surge resistance	Minimizes V_C overshoot during fast transients, improving protection margin for 3.3 V/5 V logic devices.
Matte tin-plated leads	Guarantees solderability per J-STD-002 and JESD 22-B102; E3 suffix passes JESD 201 Class 1A whisker test.

Applications

Automotive Body Control Module	Industrial PLC Digital Input
Use Scenario: Protecting microcontroller GPIO and CAN transceiver power pins against load dump and inductive switching spikes in 12 V vehicle networks. IC Role / Device Role / Timing Role: Shunt clamping device placed between V_BAT and ground, triggered within <1 ns upon overvoltage event. Use Value: Limits transient voltage to ≤58.1 V, preventing latch-up or oxide breakdown in 3.3 V MCU peripherals.	Use Scenario: Safeguarding 24 V digital input circuitry in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input channel, positioned upstream of optocoupler or Schmitt trigger. Use Value: Absorbs up to 500 W surge energy while maintaining <1 µA leakage at 24 V nominal, preserving input threshold accuracy.
Telecom Power Supply Rail	Consumer Appliance Motor Driver
Use Scenario: Secondary-side DC bus protection in AC/DC adapters and PoE injectors subjected to lightning-induced surges on Ethernet or AC mains lines. IC Role / Device Role / Timing Role: Fast-response crowbar element parallel to bulk capacitor, activated before downstream regulator fails. Use Value: Clamps 10/1000 µs transients to 58.1 V, enabling use of cost-effective 60 V-rated MOSFETs and capacitors.	Use Scenario: Gate protection for N-channel high-side MOSFETs in BLDC motor drivers experiencing back-EMF reversal and commutation spikes. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to driver IC ground, suppressing negative-going transients on gate drive traces. Use Value: Withstands 70 A single-pulse surge without degradation, ensuring robustness across 10,000+ motor start-stop cycles.

Automotive Body Control Module

Industrial PLC Digital Input

Use Scenario: Protecting microcontroller GPIO and CAN transceiver power pins against load dump and inductive switching spikes in 12 V vehicle networks.

IC Role / Device Role / Timing Role: Shunt clamping device placed between V_BAT and ground, triggered within <1 ns upon overvoltage event.

Use Value: Limits transient voltage to ≤58.1 V, preventing latch-up or oxide breakdown in 3.3 V MCU peripherals.

Use Scenario: Safeguarding 24 V digital input circuitry in programmable logic controllers exposed to relay coil flyback and field wiring surges.

IC Role / Device Role / Timing Role: Primary overvoltage clamp on input channel, positioned upstream of optocoupler or Schmitt trigger.

Use Value: Absorbs up to 500 W surge energy while maintaining <1 µA leakage at 24 V nominal, preserving input threshold accuracy.

Telecom Power Supply Rail

Consumer Appliance Motor Driver

Use Scenario: Secondary-side DC bus protection in AC/DC adapters and PoE injectors subjected to lightning-induced surges on Ethernet or AC mains lines.

IC Role / Device Role / Timing Role: Fast-response crowbar element parallel to bulk capacitor, activated before downstream regulator fails.

Use Value: Clamps 10/1000 µs transients to 58.1 V, enabling use of cost-effective 60 V-rated MOSFETs and capacitors.

Use Scenario: Gate protection for N-channel high-side MOSFETs in BLDC motor drivers experiencing back-EMF reversal and commutation spikes.

IC Role / Device Role / Timing Role: Unidirectional clamp referenced to driver IC ground, suppressing negative-going transients on gate drive traces.

Use Value: Withstands 70 A single-pulse surge without degradation, ensuring robustness across 10,000+ motor start-stop cycles.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ36A-E3/57	Same V_WM (36 V), identical DO-214AC (SMA) package; slightly higher V_C = 58.5 V at 8.5 A; RoHS-compliant, not AEC-Q101 qualified.	Preferred for space-constrained PCBs where surface-mount is required; unsuitable for automotive under-hood deployment.	Select SMAJ36A-E3/57 only if board real estate is limited and AEC-Q101 is not mandated.
1.5SMC36A	Same V_WM and V_C; larger DO-214AB (SMC) package; 1.5 kW peak power rating; AEC-Q101 qualified variant available (1.5SMC36AQ).	Used where higher surge endurance (>1000 pulses) or higher I_PPM > 30 A is required, e.g., industrial motor drives.	Choose 1.5SMC36A when system-level surge testing exceeds 500 W single-pulse requirement or when legacy SMC footprint is fixed.

Compared with SA36-E3/73, SMAJ36A-E3/57 offers surface-mount compatibility but lacks automotive qualification, while 1.5SMC36A provides higher surge capacity and mechanical robustness at the cost of larger footprint - making SA36-E3/73 optimal for cost-sensitive, AEC-Q101–mandated through-hole designs.

Availability

SA36-E3/73 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC inputs, telecom power supplies, and consumer appliance motor control requiring stable component supply and full traceability.

Supply support for SA36-E3/73 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 protection devices with emphasis on reliability, automotive qualification, and industrial ruggedness.

The SAxx series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 compliance and high surge immunity.

FAQ

What is the polarity configuration of SA36-E3/73?

The SA36-E3/73 is a unidirectional TVS diode with clearly marked cathode: a colored band identifies the cathode lead, which must be connected toward the higher-potential side (e.g., V_BAT or signal rail) for proper clamping action. The unmarked lead is the anode and connects to ground or lower-potential reference. This configuration ensures reliable turn-on during positive transients only.

Does SA36-E3/73 meet AEC-Q101 qualification?

Yes, SA36-E3/73 is AEC-Q101 qualified, as confirmed in Vishay document 88378 (Revision: 18-Sep-12), footnote (1) on page 3. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for automotive under-hood and chassis applications.

What is the maximum clamping voltage of SA36-E3/73 under surge conditions?

The SA36-E3/73 has a maximum clamping voltage (V_C) of 58.1 V at 8.6 A peak pulse current (I_PPM) with a 10/1000 µs waveform. This value is measured per Figure 7 in the datasheet and represents the upper limit of voltage seen by protected circuitry during standardized surge events - critical for ensuring downstream 60 V-rated components remain within safe operating area.

Can SA36-E3/73 be used in bi-directional protection circuits?

No, SA36-E3/73 is strictly unidirectional and must not be used for bi-directional transient suppression. For symmetric AC or dual-polarity DC protection, Vishay specifies bi-directional variants with "CA" suffix (e.g., SA36CA). Using SA36-E3/73 in reverse-biased mode beyond its specified V_WM risks irreversible breakdown due to lack of symmetrical avalanche structure.

What is the lead finish and solderability specification for SA36-E3/73?

SA36-E3/73 features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 for solderability, and passes JESD 201 Class 1A whisker testing. The "E3" suffix explicitly denotes RoHS-compliant commercial-grade construction with 275 °C / 10 s maximum solder dip tolerance - enabling compatibility with standard wave and reflow processes without lead corrosion or dewetting.

SA36-E3/73 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):: 36V

Voltage - Breakdown (Min):: 40V

Voltage - Clamping (Max) @ Ipp:: 64.3V

Current - Peak Pulse (10/1000µs):: 7.8A

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)

SA36-E3/73 FAQ

1.How can I place an order for SA36-E3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA36-E3/73 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 SA36-E3/73 reliable?

The price and inventory of SA36-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA36-E3/73 is usually 5 days.

3.What payment methods are accepted for SA36-E3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA36-E3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA36-E3/73?

SA36-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA36-E3/73 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 SA36-E3/73?

For technical support, including SA36-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA36-E3/73 requirements.

6.How does Aetrix verify that SA36-E3/73 is sourced from the original manufacturer or authorized distributors?

All SA36-E3/73 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 SA36-E3/73 meets industry standards.

7.What is the process for return or replacement of SA36-E3/73?

All SA36-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA36-E3/73, 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 SA36-E3/73 part is unused and in its original packaging.

Return procedure for SA36-E3/73:

1.Submit a request within 90 days.

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

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