My Inquiry
My Account
Taiwan Semiconductor Corporation SA30CH
- Part No.:
- SA30CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA30CH.pdf
- Description:
- 500W, 37V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,463
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SA30CH 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. It delivers AEC-Q101 qualification for automotive-grade surge protection in power supply rails and signal lines.
For engineers reviewing the SA30CH datasheet, SA30CH pinout, SA30CH application, or SA30CH equivalent, this device is selected for high-reliability ESD and lightning-induced transient suppression where fast response (<1.0ps), low leakage (<1μA @ 30V), and 175°C junction temperature capability are critical in automotive body control modules, LED drivers, and industrial sensor interfaces.
Technical Context
The SA30CH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (33.3–40.7V), clamping transients to ≤53.3V at 9.8A (10/1000μs waveform). Its low dynamic impedance ensures effective energy diversion during EFT and ISO 7637-2 pulses.
Designed for surface-mount assembly on PCBs with 10×10 mm copper pads per lead, it supports steady-state power dissipation of 3W at TL = 75°C and withstands 70A non-repetitive forward surge (8.3ms half-sine). Polarity is marked by cathode band; RoHS-compliant and halogen-free per IEC 61249-2-21.
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 @ 1mA | 33.3–40.7 V - Breakdown onset range; ensures reliable triggering above system nominal voltage with margin. |
| VC @ IPPM | 53.3 V - Clamped voltage at 9.8A peak pulse; determines maximum stress imposed on protected ICs. |
| PPK | 500 W - Peak pulse power rating (10/1000μs); quantifies single-event surge energy handling capacity. |
| IR @ VWM | <1 μA - Reverse leakage at 30V; minimizes standby power loss and avoids false triggering in high-impedance circuits. |
| TJ max | +175 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| Package | DO-204AC (DO-15) - Industry-standard axial-leaded package with tin-plated leads; compatible with wave and reflow soldering per J-STD-002. |
Pinout & Package
DO-204AC (DO-15) package with axial leads: Cathode indicated by molded band; anode and cathode terminals are non-polarized in layout but functionally asymmetric. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; completes clamping loop during overvoltage events. |
| Cathode | Protected line connection / surge input node | Connected to the line being protected (e.g., 24V supply rail); conducts avalanche current when Vreverse > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling, mechanical shock, and humidity testing per stress test plan. |
| Clamping voltage ≤53.3V at 9.8A | Ensures downstream 3.3V/5V logic ICs remain below absolute maximum ratings during ISO 16750-2 load dump surges. |
| Response time <1.0ps | Activates faster than most microcontroller I/O pin ESD structures, enabling pre-emptive protection of sensitive inputs. |
| RoHS & halogen-free | Complies with EU RoHS Directive 2011/65/EU and IEC 61249-2-21, supporting green manufacturing and end-of-life compliance. |
| 175°C max junction temperature | Supports placement near heat-generating components (e.g., MOSFETs, DC-DC inductors) without derating concerns. |
Applications
| Automotive Body Control Module (BCM) | Industrial LED Driver Power Input |
|---|---|
Use Scenario: Protects microcontroller GPIO and CAN transceiver power rails from load dump and jump-start transients in 12V/24V vehicle systems. IC Role / Device Role: Unidirectional TVS placed between battery feed and local LDO input, shunting surge energy to chassis ground. Use Value: Clamps 12V rail spikes to ≤53.3V, preventing latch-up or permanent damage to 5V-tolerant MCU pins and transceivers. |
Use Scenario: Shields constant-current LED driver ICs from inductive kickback during PWM switching in streetlight and signage systems. IC Role / Device Role: Mounted across bulk capacitor input to absorb flyback energy from relay coils or transformer leakage inductance. Use Value: Limits voltage overshoot to safe levels (<55V), avoiding overvoltage shutdown or internal FET avalanche failure in driver ICs. |
| Smart Sensor Interface Protection | POS Terminal Power Rail |
Use Scenario: Safeguards I²C/SPI sensor nodes connected to long cables exposed to ESD and EFT in factory automation environments. IC Role / Device Role: Placed on VDD line upstream of level shifters and interface ICs, acting as first-line transient sink. Use Value: Sub-1μA leakage preserves battery life in wireless sensors; <1.0ps response prevents data corruption during 4kV contact ESD events. |
Use Scenario: Secures 5V/12V power inputs of point-of-sale terminals against AC line surges and hot-plug transients during peripheral docking. IC Role / Device Role: Installed at main power entry point, parallel to bulk capacitance, to clamp fast-rising transients before reaching SMPS controller. Use Value: 500W rating handles 10/1000μs surges up to 6kV per IEC 61000-4-5; DO-15 footprint allows easy retrofit into legacy designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Bidirectional configuration; same VWM (30V), but symmetric clamping (VC = 48.4V both polarities); lower PPK (400W). | Required where bidirectional surges (e.g., RS-485 data lines) occur; unsuitable for DC-biased unidirectional rails without redesign. | Select SMAJ30A only if bipolar protection is needed; SA30CH provides superior unidirectional clamping margin and higher surge rating. |
| P6SMB30A | Same DO-214AA (SMB) package; identical VWM/VBR/VC specs; AEC-Q101 not specified in standard version; 600W PPK rating. | Higher power handling but larger footprint; lacks automotive qualification unless explicitly ordered with AEC suffix. | Choose P6SMB30A for non-automotive industrial use needing extra surge margin; SA30CH guarantees AEC-Q101 compliance out-of-box. |
Compared with SMAJ30A and P6SMB30A, the SA30CH uniquely combines AEC-Q101 qualification, 500W unidirectional surge rating, and DO-15 compatibility-making it optimal for space-constrained automotive ECUs where qualification and reliability are mandatory.
Availability
SA30CH is available at Aetrix Electronics and suitable for automotive electronics, industrial LED drivers, and smart sensor interface designs requiring stable component supply with full traceability and lifecycle management.
Supply support for SA30CH 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, and rectifiers since 1979.
The SA Series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 reliability, tight parametric distribution, and robust surge endurance in harsh environments.
FAQ
What is the polarity configuration of SA30CH?
The SA30CH is a unidirectional TVS diode with clearly marked cathode band. It conducts only during reverse overvoltage events-forward bias behaves like a standard silicon diode (~3.5V VF at 35A). This polarity enables precise placement on DC-powered lines where surge direction is known, such as 24V supply rails feeding automotive ECUs. The SA30CH must be oriented with cathode toward the protected line and anode to ground.
Does SA30CH meet AEC-Q101 requirements?
Yes, SA30CH is explicitly AEC-Q101 qualified per the manufacturer's documentation (Version L2105). It has passed stress tests including temperature cycling, high-temperature operating life, and mechanical shock-validating suitability for automotive under-hood and cabin applications. The "H" suffix in SA30CH denotes this qualification; standard SA30 does not carry this rating.
What is the maximum clamping voltage of SA30CH under surge conditions?
The SA30CH clamps to a maximum of 53.3V at 9.8A peak pulse current (10/1000μs waveform), as specified in the electrical characteristics table. This value represents worst-case voltage seen by downstream circuitry during standardized surge events and is measured at TA = 25°C. Derating applies above ambient temperature per Fig.2 in the datasheet.
Can SA30CH replace SA30 in existing designs?
Yes, SA30CH is a direct replacement for SA30 with identical electrical parameters and DO-204AC (DO-15) packaging-but adds AEC-Q101 qualification and tighter process controls. No layout or schematic changes are required. The "H" suffix indicates enhanced reliability screening; all key specs-including VWM (30V), VBR (33.3–40.7V), and VC (53.3V)-match SA30 exactly.
What is the junction-to-ambient thermal resistance (RθJA) for SA30CH?
RθJA is not published for SA30CH in the provided documentation. Thermal performance depends on PCB layout: with 10×10 mm copper pads per terminal, the device achieves 3W steady-state power dissipation at TL = 75°C. For precise thermal modeling, users should refer to the manufacturer's thermal simulation guidelines or characterize RθJA empirically using JEDEC JESD51-2 compliant test boards.
SA30CH 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:
- -
- 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)
SA30CH FAQ
1.How can I place an order for SA30CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA30CH 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 SA30CH reliable?
The price and inventory of SA30CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA30CH is usually 5 days.
3.What payment methods are accepted for SA30CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA30CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA30CH?
SA30CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA30CH 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 SA30CH?
For technical support, including SA30CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA30CH requirements.
6.How does Aetrix verify that SA30CH is sourced from the original manufacturer or authorized distributors?
All SA30CH 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 SA30CH meets industry standards.
7.What is the process for return or replacement of SA30CH?
All SA30CH units undergo pre-shipment inspection (PSI). If there is an issue with SA30CH, 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 SA30CH part is unused and in its original packaging.
Return procedure for SA30CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA30CH Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
