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Taiwan Semiconductor Corporation SA36AH
- Part No.:
- SA36AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA36AH.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,270
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Product details
Overview
SA36AH from Taiwan Semiconductor is a unidirectional AEC-Q101 qualified transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, designed for automotive and industrial overvoltage protection. It features 36 V working stand-off voltage (VWM), 40.0–48.9 V breakdown voltage (VBR @ 1 mA), 500 W peak pulse power (10/1000 μs), 64.5 V maximum clamping voltage at 8.1 A IPPM, and <1 μA reverse leakage above 10 V.
For engineers reviewing the SA36AH datasheet, SA36AH pinout, SA36AH application, or SA36AH equivalent, this device is selected for robust ESD and load-dump immunity in 12 V/24 V automotive subsystems, DC power rail protection, and I/O interface surge suppression where AEC-Q101 qualification and low clamping ratio are critical.
Technical Context
The SA36AH operates as a unidirectional avalanche diode with fast response (<1.0 ps from 0 V to VBR), enabling effective suppression of fast-rising transients such as ISO 7637-2 pulse 1, pulse 2a, and IEC 61000-4-2 ESD events. Its 175 °C maximum junction temperature and -55 °C to +175 °C operating range support under-hood and high-reliability industrial deployment.
It delivers 500 W peak pulse power per 10/1000 μs waveform with 64.5 V clamping at 8.1 A, achieving a clamping ratio (VC/VBR) of ~1.60–1.61 - indicating tight voltage control during surge events. The device uses pure tin-plated leads compliant with J-STD-002 and meets JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous DC or RMS voltage the device blocks without conduction |
| VBR min/max | 40.0 / 48.9 V @ 1 mA - Ensures reliable turn-on above system nominal voltage while avoiding false triggering |
| VC @ IPPM | 64.5 V @ 8.1 A - Limits protected circuit voltage to safe level during 500 W transient |
| PPK | 500 W (10/1000 μs) - Withstands automotive load dump and inductive switching surges |
| IR @ VWM | <1 μA - Negligible standby power loss and minimal impact on high-impedance sensing nodes |
| TJ max | +175 °C - Enables placement near heat sources (e.g., engine control units, power converters) |
| Package | DO-204AC (DO-15) - Industry-standard through-hole package with proven thermal and mechanical reliability |
Pinout & Package
SA36AH is a two-terminal unidirectional TVS diode in DO-204AC (DO-15) package. Cathode is marked by a band on the body; anode is unmarked end. Leads are pure tin-plated, solderable per J-STD-002, and meet UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-voltage reference; completes clamping path during overvoltage |
| Cathode | High-side connection point | Connected to protected line (e.g., 12 V rail); polarity marking ensures correct orientation in series with load |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors |
| 500 W peak pulse rating | Withstands ISO 7637-2 load dump pulses up to 120 V for 400 ms without failure |
| Clamping voltage ≤64.5 V | Keeps downstream ICs (e.g., CAN transceivers, microcontrollers) within absolute maximum ratings during surge |
| Response time <1.0 ps | Engages before transient energy couples into sensitive analog or digital circuitry |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and automotive environmental compliance requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in engine control modules against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input to clamp surges before regulation. Use Value: Prevents damage to 3.3 V/5 V logic supplies and MCU power domains during ISO 7637-2 pulse 5a events. | Use Scenario: Safeguarding 4–20 mA current loop transmitters from EFT and lightning-induced surges. IC Role / Device Role / Timing Role: TVS connected across loop terminals to shunt transient energy away from precision op-amps and ADC front-ends. Use Value: Maintains signal integrity and avoids latch-up in analog signal chains subjected to IEC 61000-4-4 bursts. |
| Automotive Lighting Driver Protection | DC Motor Control Board Protection |
Use Scenario: Shielding LED driver ICs in headlamp modules from inductive kickback during PWM dimming. IC Role / Device Role / Timing Role: TVS placed across MOSFET drain-source to absorb flyback energy from inductive loads. Use Value: Eliminates need for snubbers and extends lifetime of high-side switches in AHB and DRL systems. | Use Scenario: Protecting H-bridge gate drivers and current sense amplifiers in power seat/window control units. IC Role / Device Role / Timing Role: TVS installed on motor supply inputs to clamp back-EMF spikes during direction reversal. Use Value: Reduces field failures caused by repetitive 100 V+ transients generated by brushed DC motors. |
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 | Same DO-214AC package; lower PPK (400 W); higher VC (69.4 V @ 5.8 A); non-AEC-Q101 | Not qualified for automotive under-hood use; suitable for commercial-grade industrial controls | Select SMAJ36A only if AEC-Q101 is not required and board space allows SMA footprint |
| P6SMB36A | DO-214AA package; same 500 W rating; VC = 58.1 V @ 9.0 A; AEC-Q101 available in "H" variant (P6SMB36AH) | P6SMB36AH matches SA36AH's qualification and clamping performance but requires PCB layout change | Choose P6SMB36AH when higher surge current margin (9.0 A vs. 8.1 A) and lower clamping voltage are prioritized |
Compared with SMAJ36A and P6SMB36AH, SA36AH offers optimal balance of AEC-Q101 compliance, 64.5 V clamping, and DO-15 through-hole compatibility - making it preferred for legacy automotive designs requiring leaded assembly and proven thermal derating on copper pads.
Availability
SA36AH is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and DC motor control board surge suppression requiring stable component supply across extended production lifecycles.
Supply support for SA36AH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SA Series was developed specifically for AEC-Q101-compliant transient suppression in 12 V/24 V automotive systems, emphasizing low clamping ratio, high surge robustness, and long-term reliability under thermal cycling.
FAQ
What is the AEC-Q101 qualification status of SA36AH?
The SA36AH is explicitly AEC-Q101 qualified, as confirmed in the ordering code suffix "H" and product documentation. This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - validating its suitability for automotive under-hood and chassis-mounted applications where reliability is mission-critical. SA36AH meets all test conditions defined in AEC-Q101 Rev D.
Does SA36AH support bidirectional transient suppression?
No, SA36AH is a unidirectional TVS diode, intended for DC circuits with defined polarity such as 12 V battery rails. Its cathode band marking indicates polarity-sensitive installation. For bidirectional protection (e.g., AC lines or data buses), SA36A - the bidirectional variant in the same SA Series - must be used instead. SA36AH does not conduct symmetrically and will fail if reverse-biased beyond its rated VWM.
What is the maximum clamping voltage of SA36AH and at what current is it specified?
The maximum clamping voltage (VC) of SA36AH is 64.5 V, measured at 8.1 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is guaranteed across temperature and represents the upper limit of voltage seen by downstream circuitry during worst-case surge events - critical for ensuring protected ICs remain within their absolute maximum ratings.
Can SA36AH be used in surface-mount designs?
No, SA36AH is packaged exclusively in DO-204AC (DO-15), a through-hole axial lead configuration. It is not available in surface-mount packages like SMA or SMC. For SMT-compatible alternatives with similar electrical specs, consider P6SMB36AH (DO-214AA) or SMAJ36A (DO-214AC), though both require PCB redesign and differ in qualification and clamping performance.
What is the reverse leakage current specification for SA36AH at its working voltage?
SA36AH exhibits reverse leakage current (IR) of less than 1 μA when biased at its 36 V working stand-off voltage (VWM), tested at TA = 25°C. This ultra-low leakage ensures minimal power loss in always-on automotive modules and prevents loading of high-impedance voltage monitoring circuits - a key requirement for battery management and wake-up detection systems.
SA36AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- SA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 9A
- 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)
SA36AH FAQ
1.How can I place an order for SA36AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA36AH 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 SA36AH reliable?
The price and inventory of SA36AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA36AH is usually 5 days.
3.What payment methods are accepted for SA36AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA36AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA36AH?
SA36AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA36AH 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 SA36AH?
For technical support, including SA36AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA36AH requirements.
6.How does Aetrix verify that SA36AH is sourced from the original manufacturer or authorized distributors?
All SA36AH 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 SA36AH meets industry standards.
7.What is the process for return or replacement of SA36AH?
All SA36AH units undergo pre-shipment inspection (PSI). If there is an issue with SA36AH, 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 SA36AH part is unused and in its original packaging.
Return procedure for SA36AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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