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Vishay General Semiconductor - Diodes Division SA36HE3/73
- Part No.:
- SA36HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA36HE3/73.pdf
- Description:
- TVS DIODE 36VWM 64.3VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,814
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Product details
Overview
SA36HE3/73 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal and power lines. It features 36 V stand-off voltage (VWM), 40.0–44.2 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 µs), 8.6 A peak pulse current (IPPM), and clamps to ≤58.1 V at rated IPPM. It is AEC-Q101 qualified and used in automotive sensor protection and industrial I/O interfaces.
For engineers reviewing the SA36HE3/73 datasheet, SA36HE3/73 pinout, SA36HE3/73 application, or SA36HE3/73 equivalent, this page delivers verified electrical parameters, polarity behavior, clamping performance under surge conditions, thermal derating curves, and direct-fit alternatives for ESD and inductive-switching transient suppression in harsh environments.
Technical Context
The SA36HE3/73 operates as a bi-directional avalanche diode with symmetrical clamping in both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR and low leakage (<1.0 µA at VWM), while its 175 °C max junction temperature supports operation in under-hood automotive and high-ambient industrial settings.
It delivers 500 W peak pulse power per 10/1000 µs waveform with 0.01 % duty cycle, and exhibits low incremental surge resistance - critical for limiting let-through energy during fast transients like ISO 7637-2 Pulse 1/2a/5a. Clamping voltage rises linearly with current, confirmed by Fig. 9 (bi-directional incremental VC curve) in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (min/max) | 40.0 V / 44.2 V at 1 mA - Ensures reliable avalanche initiation across production lot; tight 10.5 % tolerance enables predictable turn-on |
| VC @ IPPM | ≤58.1 V at 8.6 A - Limits maximum let-through voltage during 10/1000 µs surge; critical for safeguarding 3.3 V/5 V logic interfaces |
| PPPM | 500 W - Sustains standardized lightning/surge pulses without failure; validated per IEC 61000-4-5 Level 4 requirements |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage preserves signal integrity in high-impedance sensor circuits and battery-powered nodes |
| TJ max | +175 °C - Enables placement near heat sources (e.g., power MOSFETs, motor drivers) without thermal derating penalties |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronics including HTOL, TC, and HAST |
Pinout & Package
SA36HE3/73 uses the DO-204AC (DO-15) axial-leaded package: molded epoxy case, matte tin-plated leads, RoHS-compliant, AEC-Q101 qualified (HE3 suffix). Bi-directional construction means no polarity marking - terminals are functionally identical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No cathode band; either lead serves as input/output - simplifies PCB layout for AC or differential lines |
| Lead 1 | Terminal A | Electrically identical to Lead 2; connects to protected line (e.g., CAN_H, RS-485 A, or DC bus) |
| Lead 2 | Terminal B | Electrically identical to Lead 1; connects to reference (GND or complementary line) |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term VBR stability and low parameter drift over temperature and lifetime |
| 500 W peak pulse rating (10/1000 µs) | Withstands repetitive surges per ISO 7637-2 without degradation - suitable for 12 V/24 V vehicle power nets |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock |
| DO-204AC package with JESD 201 Class 2 whisker resistance | Enables reliable wave soldering and long-term interconnect integrity in industrial control modules |
| Bi-directional symmetry | Eliminates orientation errors during manual assembly and supports floating or AC-coupled protection topologies |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting wheel speed, crankshaft, or camshaft sensors from load dump and inductive kickback in 12 V vehicle systems. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed between sensor output and ECU input, shunting transients before they reach downstream amplifier or ADC. Use Value: Limits clamped voltage to ≤58.1 V, well below typical sensor IC absolute maximum ratings (e.g., 60 V), preventing latch-up or permanent damage. |
Use Scenario: Safeguarding RS-485 transceivers (e.g., SN65HVD230) against ESD and cable discharge events in factory automation networks. IC Role / Device Role / Timing Role: Bi-directional clamp across differential pair (A/B) referenced to ground, absorbing ±8 kV contact ESD per IEC 61000-4-2. Use Value: Sub-1 ns response time and symmetrical clamping preserve signal integrity on full-duplex 10 Mbps links without adding skew or jitter. |
| DC Power Rail Protection | Consumer Appliance Motor Control |
Use Scenario: Guarding 24 V DC input rails in PLC I/O modules against switching transients from relay coils or solenoid valves. IC Role / Device Role / Timing Role: Primary rail clamp installed upstream of DC-DC converters and LDOs, diverting >100 A surge currents away from sensitive regulators. Use Value: 500 W rating and 8.6 A IPPM ensure robust handling of 1000 µs surges per IEC 61000-4-4, reducing need for secondary filtering. |
Use Scenario: Shielding microcontroller GPIOs and gate drivers in washing machine motor inverters from commutation spikes. IC Role / Device Role / Timing Role: Localized clamp at motor driver IC supply pins and feedback sensing nodes, suppressing <100 ns ringing induced by Si MOSFET switching. Use Value: Low clamping voltage (≤58.1 V) prevents overvoltage on 3.3 V MCU I/Os tied to isolated feedback circuits via optocouplers or digital isolators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/5T | Uni-directional; 36 V VWM, 40–44.4 V VBR, same DO-214AC package but surface-mount | Requires explicit polarity assignment; unsuitable for floating or AC lines without external biasing | Select when board space is constrained and polarity is fixed (e.g., +12 V rail to GND) |
| P6SMB36CA | Bi-directional; 36 V VWM, 40–44.4 V VBR, 600 W PPPM, DO-214AA package | Higher surge rating allows longer transient duration handling; larger footprint than DO-15 | Choose for enhanced surge margin where PCB real estate permits larger SMC package |
Compared with SA36HE3/73, SMAJ36A-E3/5T offers SMT compatibility but lacks bi-directional flexibility, while P6SMB36CA provides higher 600 W surge capacity in a larger package - making SA36HE3/73 optimal for cost-sensitive, through-hole automotive and industrial designs requiring AEC-Q101 compliance and axial lead reliability.
Availability
SA36HE3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and DC power rail protection requiring stable component supply, AEC-Q101 qualification, and proven surge immunity.
Supply support for SA36HE3/73 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 passive components with emphasis on reliability, automotive qualification, and high-power handling.
The SAxx series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust transient suppression in automotive, industrial, and telecom infrastructure where repeatable clamping and AEC-Q101 validation are mandatory.
FAQ
What does the 'HE3' suffix indicate in SA36HE3/73?
The HE3 suffix denotes that SA36HE3/73 is RoHS-compliant and AEC-Q101 qualified, with JESD 201 Class 2 whisker resistance on matte tin-plated leads. This distinguishes it from commercial-grade E3 variants and confirms suitability for automotive under-hood applications per Vishay's ordering nomenclature.
Is SA36HE3/73 uni-directional or bi-directional, and how is polarity identified?
SA36HE3/73 is bi-directional, meaning it clamps symmetrically for both positive and negative transients. As stated in the datasheet, bi-directional types have no marking - neither lead is designated anode or cathode, and either terminal may connect to the protected line or reference plane.
What is the maximum clamping voltage of SA36HE3/73 at its rated peak pulse current?
The maximum clamping voltage (VC) of SA36HE3/73 is 58.1 V at its rated peak pulse current (IPPM) of 8.6 A, measured under the standard 10/1000 µs waveform. This value is guaranteed across temperature and production lots per the Electrical Characteristics table on page 2 of document 88378.
Can SA36HE3/73 be used in place of SA36A or SA36CA?
SA36HE3/73 is the AEC-Q101 qualified, RoHS-compliant version of the SA36CA bi-directional TVS. It replaces SA36CA in automotive designs but is not a drop-in for SA36A (uni-directional), which requires cathode orientation and cannot protect AC or floating signals without additional circuitry.
What is the thermal derating behavior of SA36HE3/73 above 25 °C ambient?
SA36HE3/73 follows the standard pulse derating curve in Figure 2 of document 88378: peak pulse power decreases linearly from 100 % at 25 °C to ~50 % at 125 °C ambient. Its 175 °C max junction temperature allows sustained operation in high-temperature enclosures when mounted with adequate lead length (≥9.5 mm).
SA36HE3/73 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:
- -
- 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)
SA36HE3/73 FAQ
1.How can I place an order for SA36HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA36HE3/73 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 SA36HE3/73 reliable?
The price and inventory of SA36HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA36HE3/73 is usually 5 days.
3.What payment methods are accepted for SA36HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA36HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA36HE3/73?
SA36HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA36HE3/73 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 SA36HE3/73?
For technical support, including SA36HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA36HE3/73 requirements.
6.How does Aetrix verify that SA36HE3/73 is sourced from the original manufacturer or authorized distributors?
All SA36HE3/73 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 SA36HE3/73 meets industry standards.
7.What is the process for return or replacement of SA36HE3/73?
All SA36HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA36HE3/73, 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 SA36HE3/73 part is unused and in its original packaging.
Return procedure for SA36HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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