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Taiwan Semiconductor Corporation SA30C
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- Part No.:
- SA30C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA30C.pdf
- Description:
- 500W, 37V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,108
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Product details
Overview
SA30C from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 30V working stand-off voltage (VWM), 33.3–40.7V breakdown voltage (VBR @ 1mA), and 53.3V clamping voltage (VC) at 9.8A peak pulse current - designed for automotive-grade ESD and inductive load surge protection in power supply rails and signal lines.
For engineers reviewing the SA30C datasheet, SA30C pinout, SA30C application, or SA30C equivalent, this device delivers AEC-Q101-qualified transient immunity with sub-nanosecond response (<1.0ps), low leakage (<1μA @ 30V), and robust 175°C junction temperature rating - critical for under-hood electronics, LED drivers, and industrial control I/O protection.
Technical Context
The SA30C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (33.3–40.7V); it clamps transients to ≤53.3V at 9.8A (10/1000μs waveform) while maintaining <1μA leakage at 30V. Its DO-204AC package supports lead-free soldering per J-STD-002 and meets UL 94V-0 flammability.
Designed for single-polarity surge suppression, SA30C does not support bidirectional operation - unlike SA30CA variants - and exhibits a +39 mV/°C temperature coefficient of VBR, enabling predictable derating above 25°C per Fig.2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail margin. |
| VBR min/max | 33.3 V / 40.7 V @ 1 mA - guaranteed avalanche onset window; ensures consistent turn-on across production lots. |
| VC @ IPPM | 53.3 V @ 9.8 A (10/1000μs) - peak clamped voltage during worst-case surge; determines protected circuit's voltage stress limit. |
| PPK | 500 W - non-repetitive peak pulse power handling; validates capability against ISO 7637-2 Pulse 1/2a/5a waveforms. |
| IR @ VWM | <1 μA - ultra-low reverse leakage at rated stand-off; minimizes standby power loss in battery-critical systems. |
| TJ max | +175 °C - maximum junction temperature; enables placement near hot components (e.g., power MOSFETs, inductors). |
| Response time | <1.0 ps - time from 0 V to VBR under fast-rising transients; essential for protecting high-speed logic and MCU I/O. |
Pinout & Package
SA30C uses the standard DO-204AC (DO-15) axial-leaded package with cathode band marking. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance. Polarity is unidirectional: cathode (banded end) connects to system ground or low-impedance return path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Transient source side | Connected to protected line (e.g., 24V rail, CAN_H); absorbs positive surges relative to ground. |
| Cathode (banded end) | Clamp reference node | Must be tied directly to low-inductance ground plane; establishes clamping reference and conducts surge current to earth. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use per stress test conditions including temperature cycling, HTRB, and ESD. |
| 500W 10/1000μs surge rating | Withstands ≥500W transient energy without degradation - sufficient for ISO 16750-2 Load Dump simulation. |
| Sub-1ps response time | Activates before most microsecond-scale transients fully develop, preventing latch-up or gate oxide damage in downstream ICs. |
| UL 94V-0 molding compound | Self-extinguishing encapsulation prevents fire propagation in high-energy fault conditions. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - required for global automotive OEM compliance. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24V supply inputs in body control modules (BCM) against load dump and jump-start transients. IC Role / Device Role: Primary clamping element placed between fused input and DC-DC converter input. Use Value: Limits voltage to ≤53.3V during 500W surges, preventing overvoltage shutdown or destruction of downstream regulators like TPS543B20. |
Use Scenario: Shielding 4–20mA current loop receivers from EFT bursts and cable discharge events. IC Role / Device Role: Front-end TVS on analog input pins of isolators (e.g., ISO124) or ADC front-ends. Use Value: Sub-1ps response ensures clamping occurs before EFT edges (5ns rise time) reach sensitive op-amps, preserving measurement integrity. |
| LED Driver Output Protection | Motor Control Gate Drive Clamp |
Use Scenario: Safeguarding constant-current LED driver outputs (e.g., in headlamp modules) from inductive kickback during PWM switching. IC Role / Device Role: Parallel-connected TVS across LED string terminals to absorb flyback energy. Use Value: 53.3V clamping voltage stays below typical LED string forward voltage (e.g., 4×3.2V = 12.8V + margin), avoiding false triggering while blocking >100V spikes. |
Use Scenario: Suppressing voltage overshoot on high-side N-channel MOSFET gates driven by bootstrap circuits in BLDC inverters. IC Role / Device Role: Clamping diode from gate to source, referenced to local ground. Use Value: 30V VWM allows compatibility with 12V gate drive rails; 53.3V VC prevents gate oxide breakdown during Miller-induced spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ30A | Same DO-214AC package, 30V VWM, but bidirectional; 500W rating, 48.4V VC @ 10.3A. | Supports AC-coupled or floating-line protection; unsuitable where polarity-sensitive unidirectional clamping is required. | Select SMAJ30A only if bidirectional surge immunity (e.g., RS-485 bus) is needed; SA30C provides lower leakage and tighter VBR tolerance for DC rails. |
| ON Semiconductor 1.5SMC33A | DO-214AB package, 33V VWM, 500W, 53.3V VC @ 9.8A - identical clamping but higher VWM and larger footprint. | Requires PCB layout change due to different package outline and thermal pad requirements. | Choose 1.5SMC33A only if higher stand-off margin (33V vs. 30V) is prioritized over board space and AEC-Q101 qualification. |
Compared with SMAJ30A and 1.5SMC33A, SA30C offers AEC-Q101 qualification, DO-204AC compactness, and optimized unidirectional performance for automotive 24V systems - making it the preferred choice where reliability, size, and polarity-specific clamping are design-critical.
Availability
SA30C is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, LED driver output safeguarding, and motor control gate drive clamping requiring stable component supply across long-lifecycle programs.
Supply support for SA30C 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 - headquartered in Hsinchu Science Park, Taiwan.
The SA Series was developed specifically for AEC-Q101-compliant transient suppression in automotive and industrial environments, emphasizing low clamping voltage, fast response, and high-temperature reliability up to 175°C junction.
FAQ
What is the polarity configuration of SA30C?
SA30C is a unidirectional TVS diode, marked with a cathode band on the DO-204AC package. It conducts only during reverse-biased overvoltage events - anode connected to the protected line, cathode to ground. Unlike bidirectional variants (e.g., SA30CA), SA30C does not clamp positive transients on the cathode side.
Does SA30C meet AEC-Q101 qualification?
Yes, SA30C is explicitly AEC-Q101 qualified per the manufacturer's documentation (Version L2105). This includes stress testing for temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge - confirming suitability for automotive under-hood applications.
What is the maximum clamping voltage of SA30C under standard surge conditions?
The maximum clamping voltage of SA30C is 53.3 V at 9.8 A peak pulse current (10/1000μs waveform), as specified in the "Maximum clamping voltage VC@IPPM" row of the SA Series electrical characteristics table. This value defines the upper voltage limit imposed on protected circuits during surge events.
Can SA30C replace SA30A in a design?
No - SA30C and SA30A are distinct variants: SA30C has a VBR range of 33.3–40.7 V, while SA30A is tighter at 33.3–36.8 V. SA30A offers lower maximum clamping (64.3 V vs. 53.3 V) but higher VC; SA30C provides superior clamping performance at the cost of wider VBR tolerance. Direct substitution requires validation of system-level overvoltage margins.
What is the thermal derating behavior of SA30C above 25°C ambient?
SA30C's peak pulse power (500W) must be derated linearly above TA = 25°C per Figure 2 in the datasheet. At 75°C ambient, it retains ~70% of rated power (~350W); at 125°C, ~40% (~200W). Derating ensures safe operation within the 175°C maximum junction temperature limit under sustained thermal stress.
SA30C 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 9.8A
- 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)
SA30C FAQ
1.How can I place an order for SA30C through Aetrix?
Please submit a Request for Quotation (RFQ) for SA30C 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 SA30C reliable?
The price and inventory of SA30C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA30C is usually 5 days.
3.What payment methods are accepted for SA30C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA30C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA30C?
SA30C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA30C 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 SA30C?
For technical support, including SA30C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA30C requirements.
6.How does Aetrix verify that SA30C is sourced from the original manufacturer or authorized distributors?
All SA30C 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 SA30C meets industry standards.
7.What is the process for return or replacement of SA30C?
All SA30C units undergo pre-shipment inspection (PSI). If there is an issue with SA30C, 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 SA30C part is unused and in its original packaging.
Return procedure for SA30C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA30C Tags
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