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Taiwan Semiconductor Corporation SA120H
- Part No.:
- SA120H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA120H.pdf
- Description:
- 500W, 148V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,245
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Product details
Overview
SA120H 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 120 V working stand-off voltage (VWM), 133–163 V breakdown voltage (VBR @ 1 mA), 2.4 A peak pulse current (IPPM), 214 V clamping voltage (VC) at IPPM, and 500 W peak pulse power rating at 10/1000 µs waveform.
For engineers reviewing the SA120H datasheet, SA120H pinout, SA120H application, or SA120H equivalent, this device is selected for high-reliability DC bus protection in automotive ECUs, industrial PLC I/O modules, and 24–48 V power rail surge suppression where AEC-Q101 qualification, low leakage (<1 µA @ 120 V), and fast clamping (<1.0 ps response) are critical.
Technical Context
The SA120H operates as a unidirectional avalanche diode with precise VBR tolerance (min 133 V, max 163 V at 1 mA), enabling robust overvoltage clamping on positive-rail systems. Its 214 V VC at 2.4 A ensures predictable energy diversion during 10/1000 µs transients while maintaining <1 µA reverse leakage above 120 V.
Designed for automotive-grade reliability, it meets AEC-Q101 stress test requirements and supports junction temperatures from –55 °C to +175 °C. The DO-204AC package provides mechanical robustness and thermal dissipation suitable for leaded PCB mounting with 0.400 g mass and UL 94V-0 molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - Maximum continuous DC or RMS voltage the device blocks without conduction. |
| VBR @ IT=1 mA | 133–163 V - Breakdown threshold range ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM=2.4 A | 214 V - Clamped voltage during 10/1000 µs surge, defining maximum stress on protected circuitry. |
| PPK | 500 W - Peak surge power handling capability per single non-repetitive 10/1000 µs pulse. |
| IR @ VWM | <1 µA - Ultra-low leakage current preserving system efficiency and signal integrity at rated stand-off. |
| TJ max | +175 °C - Maximum junction temperature enabling operation in under-hood or high-ambient industrial environments. |
| Package | DO-204AC (DO-15) - Standard axial-leaded package with tin-plated leads, UL 94V-0 rated epoxy, and JESD201 Class 2 whisker resistance. |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, cathode-banded end, pure tin-plated leads solderable per J-STD-002, weight ≈ 0.400 g. Molding compound meets UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; defines unidirectional current flow direction during clamping. |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V rail); conducts avalanche current when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements including HTOL, TCT, ESD, and mechanical shock. |
| Fast response time | <1.0 ps from 0 V to VBR - Enables sub-nanosecond clamping onset for EFT and lightning-induced transients. |
| Low impedance surge path | 214 V clamping at 2.4 A - Limits voltage overshoot to safe levels for downstream 150 V-rated ICs and MOSFETs. |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS directives - Supports environmentally compliant manufacturing and end-of-life recycling. |
| Thermal robustness | 175 °C max junction temperature - Sustains operation in engine control units, motor drives, and industrial enclosures. |
Applications
| Automotive Body Control Module (BCM) | Industrial 48 V DC Power Distribution |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and alternator ripple in vehicle body electronics. IC Role / Device Role: Unidirectional TVS placed between 12 V supply rail and ground to clamp transients up to ISO 7637-2 Pulse 5a. Use Value: Maintains VWM = 120 V margin above nominal 14 V system, with 214 V clamping preventing damage to 150 V-rated CAN/LIN drivers. |
Use Scenario: Safeguarding programmable logic controller (PLC) digital input cards connected to 48 V field sensors subject to inductive switching surges. IC Role / Device Role: Rail-to-ground TVS on 48 V supply input to absorb 500 W surges from solenoid coil de-energization. Use Value: With 2.4 A IPPM and 214 V VC, limits transient voltage to within 150 % of nominal rail, protecting 60 V-rated interface ICs. |
| Telecom Remote Radio Unit (RRU) Power Input | Commercial Lighting LED Driver Protection |
Use Scenario: Securing 48 V DC power entry of outdoor base station RRUs against lightning-induced surges on long cable runs. IC Role / Device Role: Primary-level unidirectional TVS on DC input stage before DC/DC converters and PMICs. Use Value: 500 W PPK rating and 175 °C TJ max ensure survivability in outdoor enclosures with ambient temperatures up to 85 °C. |
Use Scenario: Shielding constant-current LED driver ICs from ESD and switching transients generated by nearby AC relays or dimmers. IC Role / Device Role: Standoff protection on 12–24 V LED string supply lines in commercial troffer and streetlight fixtures. Use Value: Sub-1 µA IR at 120 V prevents standby power loss, while DO-15 package enables automated through-hole assembly in high-volume lighting production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A | Bidirectional configuration; same VWM (120 V), but symmetric clamping (VC = 193 V both polarities); SMB package (surface-mount). | Required where bidirectional protection is needed (e.g., AC-coupled data lines); not suitable for unidirectional rail clamping without polarity redesign. | Select SMBJ120A only if board layout supports SMT and system requires symmetrical surge handling. |
| 1N6330 | Same DO-15 package and unidirectional function; lower PPK (300 W), higher VC (240 V @ 1.7 A), no AEC-Q101 qualification. | Acceptable for non-automotive industrial use with relaxed surge immunity requirements; lacks automotive reliability validation. | Choose 1N6330 only for cost-sensitive, non-automotive applications where 500 W surge headroom is not required. |
Compared with SMBJ120A and 1N6330, SA120H uniquely combines AEC-Q101 qualification, 500 W surge rating, and DO-15 through-hole compatibility-making it the only option among the three qualified for automotive under-hood deployment with full 120 V rail margin and sub-µA leakage.
Availability
SA120H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial PLC I/O modules, and telecom remote radio unit power inputs requiring stable component supply with AEC-Q101 assurance and long-term lifecycle continuity.
Supply support for SA120H 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 high-energy transient suppression in harsh-environment applications, emphasizing AEC-Q101 reliability, tight VBR tolerance, and consistent clamping performance across temperature.
FAQ
What is the clamping voltage of SA120H at its rated peak pulse current?
The SA120H has a maximum clamping voltage (VC) of 214 V when subjected to its rated peak pulse current (IPPM) of 2.4 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SA120H maintains this clamping performance across its specified operating temperature range.
Is SA120H unidirectional or bidirectional, and how is polarity identified?
The SA120H is a unidirectional TVS diode, intended for DC rail-to-ground protection. Polarity is marked by a cathode band on the DO-204AC (DO-15) package body - the banded end connects to the protected line (e.g., 12 V or 48 V rail), while the unbanded end connects to ground. Bidirectional variants in the SA family use "CA" suffixes (e.g., SA120CA), which SA120H does not carry.
Does SA120H meet automotive qualification standards?
Yes, SA120H is explicitly AEC-Q101 qualified, as confirmed in the ordering code suffix "H" and product documentation. It undergoes stress testing including high-temperature operating life (HTOL), temperature cycling (TCT), electrostatic discharge (HBM/MM), and mechanical shock - validating suitability for automotive powertrain, chassis, and body electronics applications.
What is the maximum steady-state power dissipation for SA120H?
The SA120H has a steady-state power dissipation (PD) rating of 3 W when mounted on 10 × 10 mm copper pads per lead at TL = 75 °C. This rating applies to continuous DC or low-frequency AC conditions - not transient surges. For pulsed operation, the 500 W peak pulse power (PPK) applies only to non-repetitive 10/1000 µs waveforms, derated above TA = 25 °C per the published derating curve.
How does SA120H compare to SA120A in terms of electrical performance?
The SA120H and SA120A share identical VWM (120 V), VBR range (133–163 V), and package (DO-204AC), but SA120H is AEC-Q101 qualified while SA120A is not. Electrically, SA120A has slightly tighter VBR (133–147 V) and lower clamping voltage (193 V vs. 214 V), but SA120H's qualification makes it the sole choice for automotive designs requiring certified reliability - even with marginally higher VC.
SA120H 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):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 214V
- Current - Peak Pulse (10/1000µs):
- 2.4A
- 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)
SA120H FAQ
1.How can I place an order for SA120H through Aetrix?
Please submit a Request for Quotation (RFQ) for SA120H 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 SA120H reliable?
The price and inventory of SA120H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA120H is usually 5 days.
3.What payment methods are accepted for SA120H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA120H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA120H?
SA120H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA120H 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 SA120H?
For technical support, including SA120H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA120H requirements.
6.How does Aetrix verify that SA120H is sourced from the original manufacturer or authorized distributors?
All SA120H 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 SA120H meets industry standards.
7.What is the process for return or replacement of SA120H?
All SA120H units undergo pre-shipment inspection (PSI). If there is an issue with SA120H, 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 SA120H part is unused and in its original packaging.
Return procedure for SA120H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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