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onsemi SA36A
- Part No.:
- SA36A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA36A.pdf
- Description:
- TVS DIODE 36VWM 58.1VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,785
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Product details
Overview
SA36A from Fairchild Semiconductor is a unidirectional 500 W transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power lines and signal interfaces. It features a 36 V reverse stand-off voltage (VRWM), 40.0–44.2 V breakdown voltage (VBR) at 1.0 mA, 58.1 V clamping voltage (VC) at 8.6 A peak pulse current (IPPM), and operates up to +175 °C junction temperature.
For engineers reviewing the SA36A datasheet, pinout, applications, or equivalent options, this device is selected for robust surge immunity in industrial power supplies, automotive body electronics, and telecom interface protection where fast clamping (<1.0 ps response), low leakage (<1.0 µA above 10 V), and DO-15 package compatibility are critical design requirements.
Technical Context
The SA36A employs a glass-passivated PN junction optimized for high-energy transient suppression on the standardized 10/1000 µs waveform. Its unidirectional configuration provides asymmetric clamping-conducting only during reverse overvoltage events while blocking forward conduction beyond rated forward surge limits.
It delivers 500 W peak pulse power with low incremental surge resistance and exhibits stable clamping performance across ambient temperatures from –65 °C to +175 °C. The device is rated for non-repetitive forward surge current of 70 A (8.3 ms half-sine, JEDEC method) and maintains <1.0 µA reverse leakage at VRWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 500 W - sustains single high-energy surges per IEC 61000-4-5 Level 4 without failure |
| Reverse Stand-off Voltage (VRWM) | 36 V - maximum continuous DC operating voltage before clamping initiates |
| Breakdown Voltage (VBR) | 40.0–44.2 V at 1.0 mA - precise threshold for reliable turn-on under overvoltage |
| Clamping Voltage (VC) | 58.1 V at 8.6 A IPPM - limits downstream voltage stress during surge events |
| Peak Pulse Current (IPPM) | 8.6 A - quantifies maximum surge current the device can safely divert |
| Reverse Leakage (IR) | <1.0 µA at VRWM - ensures minimal standby power loss and signal integrity |
| Junction Temperature (TJ) | +175 °C - supports operation in high-temperature environments like engine compartments |
Pinout & Package
SA36A is housed in a DO-15 axial leaded package with cathode indicated by a color band. The device has two terminals: anode and cathode. The cathode serves as the reference node for clamping action during reverse overvoltage conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path / low-side connection | Connected to ground or low-impedance return; completes clamping loop during transient |
| Cathode | Protected line input / high-side connection | Connected to the line being protected; conducts when voltage exceeds VRWM |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term reliability and moisture resistance in harsh industrial environments |
| Fast response time | <1.0 ps from 0 V to VBR - ensures clamping activation before sensitive circuitry is exposed |
| Low incremental surge resistance | Minimizes voltage overshoot during high di/dt transients, improving clamping precision |
| 500 W peak pulse rating | Meets IEC 61000-4-5 surge immunity requirements for Level 4 (4 kV line-to-ground) |
| DO-15 package compatibility | Supports standard through-hole PCB assembly and thermal management via 0.375" lead length |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protects 24 V DC input rails in programmable logic controllers (PLCs) against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary shunt TVS element placed upstream of DC-DC converters and microcontrollers. Use Value: Clamps 58.1 V at 8.6 A to prevent damage to 36 V-rated input stages while maintaining <1.0 µA leakage during normal operation. |
Use Scenario: Shields LIN bus and sensor supply lines in BCMs from battery reversal and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional overvoltage clamp on 12 V auxiliary rails feeding door modules and lighting drivers. Use Value: Withstands 70 A non-repetitive forward surge and operates reliably up to +175 °C near engine bays. |
| Telecom Interface Protection | Renewable Energy Charge Controller |
Use Scenario: Guards RS-485 transceiver power pins against ESD and lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: First-line transient suppressor on VCC rail, coordinated with secondary TVS and filtering. Use Value: Fast <1.0 ps response ensures clamping precedes transceiver latch-up; DO-15 footprint allows compact layout. |
Use Scenario: Protects solar panel input stage of MPPT charge controllers from induced surges during thunderstorms. IC Role / Device Role / Timing Role: DC bus clamp between PV array and buck converter input capacitor. Use Value: 500 W rating handles multi-kA surge currents; 36 V VRWM matches nominal 36 V battery system architecture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A (ON Semiconductor) | Same VRWM (36 V), but SMB package (surface-mount); lower IPPM (8.3 A vs. 8.6 A); 600 W rating | Preferred for space-constrained PCBs; requires rework for through-hole legacy designs | Select SMBJ36A when board real estate is limited and SMT assembly is available |
| P6SMB36A (Littelfuse) | Identical electrical specs (VRWM = 36 V, VC = 58.1 V, IPPM = 8.6 A); same DO-15 package; RoHS-compliant revision | Drop-in replacement with identical thermal and mechanical behavior; qualified for extended temperature cycling | Choose P6SMB36A for enhanced environmental compliance and long-term supply continuity |
Compared with SA36A, SMBJ36A offers surface-mount flexibility at the cost of through-hole compatibility, while P6SMB36A provides identical form-fit-function with updated manufacturing controls and broader qualification testing-making it ideal for new designs requiring assured lifecycle support.
Availability
SA36A is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and telecom interface protection requiring stable component supply, consistent parametric performance, and long-term manufacturability assurance.
Supply support for SA36A 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
Fairchild Semiconductor was a leading designer and manufacturer of high-performance analog and power semiconductors, acquired by ON Semiconductor in 2016. Its TVS portfolio emphasized ruggedness, precision clamping, and broad environmental qualification.
The SAxxA series was developed specifically for cost-sensitive, high-volume industrial and automotive surge protection applications where DO-15 packaging, 500 W capability, and tight VBR tolerance were essential design criteria.
FAQ
What is the clamping voltage of the SA36A under peak pulse conditions?
The SA36A has a maximum clamping voltage (VC) of 58.1 V when subjected to its rated peak pulse current of 8.6 A on the 10/1000 µs waveform. This value is measured per industry-standard test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SA36A maintains this clamping performance across its full operating temperature range.
Is the SA36A suitable for bidirectional transient protection?
No, the SA36A is a unidirectional TVS diode and is not rated for bidirectional protection. Its electrical characteristics apply only in reverse-bias mode; forward conduction is limited to surge conditions. For bidirectional applications, the SA36CA variant must be used, which provides symmetrical clamping in both polarities and omits the cathode band marking.
What is the maximum junction temperature rating for the SA36A?
The SA36A is rated for a maximum operating junction temperature (TJ) of +175 °C. This specification enables reliable deployment in high-temperature environments such as under-hood automotive systems or enclosed industrial enclosures. Derating curves in the datasheet define allowable power dissipation versus ambient temperature to maintain safe TJ operation.
Does the SA36A meet IEC 61000-4-5 surge immunity standards?
Yes, the SA36A's 500 W peak pulse power rating on the 10/1000 µs waveform aligns with IEC 61000-4-5 Level 4 (4 kV line-to-ground) test requirements when properly implemented with appropriate PCB layout and series impedance. Its fast response time and low clamping voltage make it suitable as a primary protection element in compliant designs.
How does the SA36A compare to the SA36CA in terms of physical identification?
The SA36A features a visible cathode band on the DO-15 package to indicate polarity, whereas the SA36CA (bidirectional version) has no color band. This visual distinction prevents incorrect placement in unidirectional circuits. Both share identical electrical ratings for reverse parameters, but only SA36CA conducts symmetrically in both directions-critical for AC-coupled or floating signal lines.
SA36A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- MiniMosorb™
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
SA36A FAQ
1.How can I place an order for SA36A through Aetrix?
Please submit a Request for Quotation (RFQ) for SA36A 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 SA36A reliable?
The price and inventory of SA36A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA36A is usually 5 days.
3.What payment methods are accepted for SA36A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA36A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA36A?
SA36A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA36A 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 SA36A?
For technical support, including SA36A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA36A requirements.
6.How does Aetrix verify that SA36A is sourced from the original manufacturer or authorized distributors?
All SA36A 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 SA36A meets industry standards.
7.What is the process for return or replacement of SA36A?
All SA36A units undergo pre-shipment inspection (PSI). If there is an issue with SA36A, 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 SA36A part is unused and in its original packaging.
Return procedure for SA36A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA36A Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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