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Taiwan Semiconductor Corporation SA24CH
- Part No.:
- SA24CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA24CH.pdf
- Description:
- 500W, 29.7V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,671
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Product details
Overview
SA24CH from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode with 24V working stand-off voltage, 26.7–32.6V breakdown voltage at 1mA test current, and 42.1V maximum clamping voltage at 12A peak pulse current; designed for automotive-grade ESD and inductive load surge protection in power supply rails and signal lines.
For engineers reviewing the SA24CH datasheet, SA24CH pinout, SA24CH application, or SA24CH equivalent, this AEC-Q101 qualified DO-15 TVS offers verified clamping performance under 10/1000μs surges, low leakage (<1μA @ 24V), and fast response (<1.0ps), supporting robust overvoltage immunity in automotive body control modules, lighting drivers, and industrial sensor interfaces.
Technical Context
The SA24CH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (26.7–32.6V); it clamps transients to ≤42.1V at 12A while dissipating up to 500W non-repetitive surge energy per 10/1000μs waveform. Its junction temperature rating extends to +175°C, enabling use in under-hood automotive environments.
Designed for AEC-Q101 compliance, the device features pure tin-plated leads, UL 94V-0 molding compound, and JESD201 Class 2 whisker resistance. Polarity is marked by cathode band, and it exhibits <1μA reverse leakage above 24V - critical for low-power standby circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR min/max | 26.7 V / 32.6 V @ 1 mA - Breakdown threshold range; ensures reliable triggering across process variation and temperature. |
| VC @ IPPM | 42.1 V @ 12 A - Clamped voltage during 10/1000μs surge; determines protected circuit's maximum stress level. |
| PPK | 500 W - Peak pulse power handling; supports IEC 61000-4-5 Level 4 (4kV) surge immunity in properly designed layouts. |
| IR @ VWM | <1 μA - Reverse leakage at rated stand-off; minimizes quiescent power loss in battery-backed systems. |
| TJ max | +175 °C - Maximum junction temperature; enables deployment in high-ambient automotive engine compartments. |
| Response time | <1.0 ps - Time from 0 V to VBR onset; ensures sub-nanosecond reaction to ESD events per IEC 61000-4-2. |
Pinout & Package
Package: DO-204AC (DO-15), axial leaded, epoxy-molded case with cathode band marking polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24V rail); conducts avalanche current during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling, humidity bias, and mechanical shock per stress test requirements. |
| Low clamping ratio (VC/VBR) | ~1.57 (42.1V / 26.7V) - Ensures tight voltage limiting without excessive overshoot during fast transients. |
| UL 94V-0 flammability rating | Molding compound self-extinguishes within 10 seconds after flame removal - meets automotive cabin safety standards. |
| Junction capacitance | Typical 200 pF @ 0 V (Fig.4) - Low enough for CAN/LIN bus protection without signal integrity degradation. |
| Lead finish | Pure tin plating - RoHS-compliant, halogen-free, and compatible with standard reflow and wave soldering profiles. |
Applications
| Automotive Lighting Driver Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and MOSFET gate drivers from inductive kickback during headlamp or DRL switching. IC Role / Device Role: Unidirectional TVS placed between 24V supply rail and ground to clamp flyback spikes up to ±100V. Use Value: Limits voltage seen by downstream ICs to ≤42.1V, preventing latch-up or oxide breakdown in 30V-rated logic and gate drivers. | Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers against field-wiring ESD and relay contact bounce. IC Role / Device Role: Standoff protection element on discrete optocoupler input stage, absorbing IEC 61000-4-2 ±8kV contact discharge. Use Value: Maintains <1μA leakage at 24V, preserving input threshold accuracy while surviving repeated 500W surges without parametric shift. |
| Automotive Body Control Module (BCM) | DC Motor Controller Power Rail |
Use Scenario: Shielding microcontroller I/O and CAN transceiver power pins from load dump and jump-start transients in BCM subsystems. IC Role / Device Role: Primary clamping device on 12V/24V system rails, coordinated with upstream fuses and secondary LC filtering. Use Value: Withstands 175°C junction temperature and AEC-Q101 stress, ensuring reliability across -40°C to +125°C ambient operation. | Use Scenario: Suppressing back-EMF spikes generated during PWM commutation of brushed DC motors in power seats or window lifters. IC Role / Device Role: Parallel-connected TVS on H-bridge supply node, diverting inductive energy away from motor driver ICs. Use Value: Delivers 500W peak pulse power handling with 12A IPPM, matching typical motor stall surge profiles per ISO 7637-2 Pulse 1/2a. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Same DO-214AC package; 26.7–29.5V VBR, 43.0V VC @ 11.5A; slightly higher clamping voltage and lower IPPM (11.5A vs. 12A). | Not AEC-Q101 qualified; intended for commercial/industrial use only. | Select SMAJ24A only if automotive qualification is not required and board space allows SMA footprint. |
| 1.5KE24CA | DO-201AD package; bidirectional; 26.7–29.5V VBR, 38.9V VC @ 13A; higher peak current but larger thermal mass and slower response (~5ns). | Bidirectional conduction limits use in DC-only rails; requires polarity-insensitive placement. | Choose 1.5KE24CA only for AC-coupled or dual-rail protection where bidirectional clamping is mandatory. |
Compared with SMAJ24A and 1.5KE24CA, the SA24CH provides AEC-Q101 validation, tighter unidirectional clamping (42.1V), and sub-picosecond response - making it the preferred choice for automotive 24V rail protection where qualification, precision, and speed are design-critical.
Availability
SA24CH is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC inputs, body control modules, and DC motor controller power rails requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SA24CH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, Zener diodes, and MOSFETs for automotive, industrial, and consumer markets.
The SA Series was developed specifically for AEC-Q101-compliant transient suppression in 12V/24V automotive electrical systems, emphasizing low clamping voltage, high surge robustness, and extended temperature operation.
FAQ
What is the AEC-Q101 qualification status of the SA24CH?
The SA24CH is explicitly AEC-Q101 qualified per the manufacturer's ordering code suffix "H", confirming full compliance with stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. This qualification applies directly to the SA24CH part number and is documented in Taiwan Semiconductor's SA Series qualification report L2105.
Does the SA24CH have bidirectional capability?
No, the SA24CH is a unidirectional TVS diode, as indicated by its "SA" prefix (not "SAC" or "SAxxA") and cathode-band marking. It clamps only in reverse bias; forward conduction follows standard silicon diode behavior with VF ≈ 3.5V at 35A. Bidirectional variants like SA24A exist but are distinct part numbers.
What is the maximum peak pulse current (IPPM) rating for SA24CH?
The SA24CH has a maximum peak pulse current (IPPM) of 12.0 A under the standard 10/1000μs double-exponential surge waveform, corresponding to its 500W peak pulse power rating at TA = 25°C. Derating applies above 25°C per Figure 2 in the datasheet.
Can SA24CH be used in place of SA24A?
No - SA24CH and SA24A are functionally distinct: SA24CH is unidirectional and AEC-Q101 qualified, while SA24A is bidirectional and not AEC-Q101 rated. Their VBR, VC, and IPPM values differ (SA24A: VBR = 26.7–29.5V, VC = 50.1V @ 13.4A), and polarity layout is incompatible. Substitution requires schematic and layout revision.
What is the reverse leakage current specification for SA24CH at its working voltage?
The SA24CH exhibits reverse leakage current (IR) of less than 1 μA when biased at its 24V working stand-off voltage (VWM), measured at TA = 25°C. This ultra-low leakage preserves battery life in always-on automotive modules and avoids false triggering in high-impedance sensing circuits.
SA24CH 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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
SA24CH FAQ
1.How can I place an order for SA24CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA24CH 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 SA24CH reliable?
The price and inventory of SA24CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA24CH is usually 5 days.
3.What payment methods are accepted for SA24CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA24CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA24CH?
SA24CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA24CH 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 SA24CH?
For technical support, including SA24CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA24CH requirements.
6.How does Aetrix verify that SA24CH is sourced from the original manufacturer or authorized distributors?
All SA24CH 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 SA24CH meets industry standards.
7.What is the process for return or replacement of SA24CH?
All SA24CH units undergo pre-shipment inspection (PSI). If there is an issue with SA24CH, 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 SA24CH part is unused and in its original packaging.
Return procedure for SA24CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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