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onsemi SZSMS24CT1G
- Part No.:
- SZSMS24CT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
SZSMS24CT1G.pdf
- Description:
- SURGE PROTECTOR ARRAY
- Quantity:
- Payment:
- Shipping:
Inventory:4,478
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Product details
Overview
SZSMS24CT1G from onsemi is an automotive-grade ESD protection diode array with monolithic common-anode architecture in TSOP-6 (Case 318G) package, rated for 24 V reverse working voltage, 32 V max breakdown voltage, and 44 V clamping voltage at 8 A peak pulse current. It delivers 350 W peak power dissipation (8 × 20 µs), 15 kV IEC 61000-4-2 air discharge ESD protection, and is AEC-Q101 qualified for use in automotive serial port interfaces.
For engineers reviewing the SZSMS24CT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 24 V VRWM rating, low 60–75 pF line-to-GND capacitance, TSOP-6 footprint compatibility, and AEC-Q101 qualification for under-hood electronics.
Technical Context
The SZSMS24CT1G implements a five-line common-anode ESD protection structure in a single monolithic silicon die, enabling simultaneous transient suppression across five independent signal lines while sharing one anode connection to VCC or bias rail. Its design targets fast response to ESD events (IEC 61000-4-2 compliant) and high-energy surges (8 × 20 µs waveform).
It operates over −40 °C to +150 °C junction temperature range and maintains <1.0 µA reverse leakage at 24 V VRWM. The device's clamping behavior is characterized at two defined test currents (5 A and 8 A), delivering 40 V and 44 V VC respectively-critical for safeguarding 24 V CAN, LIN, or sensor interface receivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 24 V - Maximum continuous DC operating voltage before conduction; matches 24 V automotive supply rails. |
| VBR (min) | 26.7 V - Ensures reliable turn-on above normal operating transients without false triggering. |
| VC @ IPP = 8 A | 44 V - Clamping voltage during worst-case surge; keeps protected IC inputs below absolute maximum ratings. |
| IPP (max) | 8.0 A - Peak pulse current handling capacity per line under 8 × 20 µs waveform. |
| CJ (max) | 75 pF - Low line-to-GND capacitance preserves signal integrity in high-speed 24 V bus interfaces. |
| ESD Rating | 15 kV air / 8 kV contact (IEC 61000-4-2) - Meets automotive EMC immunity requirements. |
| AEC-Q101 | Qualified - Validated for automotive under-hood applications with extended temperature and reliability testing. |
Pinout & Package
TSOP-6 package (Case 318G), 3.00 mm × 1.50 mm × 0.90 mm body, 0.95 mm pitch, Pb-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Line 1) | ESD-protected signal input/output; connects to first protected line (e.g., CAN_H). |
| 2 | Anode | Common anode tied to VCC or bias rail; provides shared return path for all five cathodes. |
| 3 | Cathode (Line 2) | Second protected signal line (e.g., CAN_L). |
| 4 | Cathode (Line 3) | Third protected signal line (e.g., LIN bus). |
| 5 | Cathode (Line 4) | Fourth protected signal line (e.g., sensor analog output). |
| 6 | Cathode (Line 5) | Fifth protected signal line (e.g., diagnostic enable). |
Key Features
| Feature | Design Value |
|---|---|
| 5-line common-anode ESD protection | Enables compact PCB layout with single-device protection of five independent 24 V signals. |
| 350 W peak power rating (8 × 20 µs) | Withstands high-energy transients typical in automotive load-dump and ISO 7637-2 pulse 1/2a environments. |
| AEC-Q101 qualification | Validated for automotive under-hood deployment including temperature cycling, HTRB, and ESD stress tests. |
| UL 94 V-0 flammability rating | Meets safety standards for plastic housing integration in engine control modules and junction boxes. |
| Pb-free TSOP-6 package | Supports lead-free reflow assembly and complies with global environmental regulations (RoHS, ELV). |
Applications
| Automotive CAN Bus Protection | 24 V Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting CAN_H and CAN_L lines in body control modules exposed to ISO 7637-2 transients and ESD events during service. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between connector and CAN transceiver. Use Value: Limits clamped voltage to ≤44 V during 8 A surge, preventing damage to 36 V-tolerant CAN PHY inputs. |
Use Scenario: Safeguarding analog outputs of pressure, temperature, or position sensors in 24 V chassis systems. IC Role / Device Role / Timing Role: Unidirectional ESD clamp on each sensor signal line, referenced to 24 V supply via common anode. Use Value: 75 pF max capacitance avoids signal distortion in 10 kHz bandwidth sensor outputs. |
| LIN Bus Node Protection | Diagnostic Port (OBD-II) Protection |
|
Use Scenario: Securing LIN bus communication lines in door modules and seat controllers against ESD and coupling noise. IC Role / Device Role / Timing Role: Five-cathode array protecting LIN data, wake-up, power, ground, and status lines in single package. Use Value: 24 V VRWM aligns with LIN physical layer supply, ensuring no leakage during 12–27 V operating range. |
Use Scenario: Hardening OBD-II connector pins (CAN_H, CAN_L, K-Line, L-Line, power) against workshop ESD and hot-plug transients. IC Role / Device Role / Timing Role: Multi-line ESD suppressor mounted directly at connector footprint. Use Value: 15 kV air/8 kV contact ESD rating exceeds ISO 10605 requirements for service port immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM24C.TCT | Same VRWM (24 V), but lower PPK (200 W), higher CJ (100 pF), and no AEC-Q101 qualification. | Targeted at industrial/commercial 24 V interfaces-not automotive qualified. | Select when AEC-Q101 is not required and cost sensitivity outweighs surge margin. |
| TPD2E001DRYR | Lower VRWM (5.5 V), dual-channel only, 12 pF CJ, supports USB 2.0 speeds-unsuitable for 24 V lines. | Designed for low-voltage high-speed data (USB, HDMI), not 24 V automotive buses. | Reject for 24 V applications; only consider for sub-6 V digital interfaces requiring ultra-low capacitance. |
Compared with SM24C.TCT and TPD2E001DRYR, the SZSMS24CT1G uniquely combines AEC-Q101 qualification, 24 V VRWM, five-line integration, and 350 W surge capability-making it the only drop-in solution for automotive 24 V multi-signal protection where reliability and space constraints are critical.
Availability
SZSMS24CT1G is available at Aetrix Electronics and suitable for automotive electronic control units, 24 V sensor subsystems, and LIN/CAN network nodes requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for SZSMS24CT1G 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The SZSMS24CT1G belongs to onsemi's automotive-qualified ESD protection portfolio, engineered specifically for robust transient suppression in 12 V/24 V vehicle networks-including CAN, LIN, FlexRay, and sensor interfaces-where AEC-Q101 reliability and compact packaging are mandatory.
FAQ
What is the maximum clamping voltage of the SZSMS24CT1G at 8 A peak pulse current?
The SZSMS24CT1G has a maximum clamping voltage (VC) of 44 V when subjected to an 8 A peak pulse current under the 8 × 20 µs waveform condition. This value is specified in the Electrical Characteristics table of the official onsemi datasheet (Rev. 12, June 2026) and ensures safe operation for 24 V system components with sufficient voltage margin.
Is the SZSMS24CT1G pin-compatible with other SMS24C-series variants like SMS24CT1G?
Yes, the SZSMS24CT1G shares identical pinout, package (TSOP-6), and electrical characteristics with SMS24CT1G-the "SZ" prefix denotes automotive-specific traceability and PPAP capability, but does not alter pin function or mechanical layout. Both devices use Pin 1 = Cathode, Pin 2 = Anode, Pins 3–6 = Cathodes.
Does the SZSMS24CT1G support bidirectional ESD protection?
No-the SZSMS24CT1G implements a common-anode unidirectional configuration. Each cathode protects a signal line referenced to a positive supply (e.g., 24 V), conducting only during negative transients relative to VCC. For bidirectional protection, external series resistors or complementary diode arrangements are required.
What is the junction capacitance of the SZSMS24CT1G at 0 V reverse bias?
The SZSMS24CT1G exhibits a typical junction capacitance (CJ) of 60–75 pF per line at 0 V reverse bias and 1.0 MHz frequency, as measured line-to-GND. This low capacitance minimizes signal attenuation and timing skew in 24 V analog and low-speed digital interfaces such as LIN and sensor outputs.
How does the SZSMS24CT1G meet automotive reliability requirements?
The SZSMS24CT1G is AEC-Q101 qualified, meaning it undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias (HTRB), and ESD robustness-to ensure performance across −40 °C to +150 °C operating range. Its UL 94 V-0 flammability rating and Pb-free TSOP-6 construction further support automotive under-hood deployment.
SZSMS24CT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 5
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V (Max)
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 14.5V
- Current - Peak Pulse (10/1000µs):
- 15A
- Power - Peak Pulse:
- 350W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- 60pF @ 1MHz
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSOP
SZSMS24CT1G FAQ
1.How can I place an order for SZSMS24CT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZSMS24CT1G 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 SZSMS24CT1G reliable?
The price and inventory of SZSMS24CT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZSMS24CT1G is usually 5 days.
3.What payment methods are accepted for SZSMS24CT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZSMS24CT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZSMS24CT1G?
SZSMS24CT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZSMS24CT1G 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 SZSMS24CT1G?
For technical support, including SZSMS24CT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZSMS24CT1G requirements.
6.How does Aetrix verify that SZSMS24CT1G is sourced from the original manufacturer or authorized distributors?
All SZSMS24CT1G 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 SZSMS24CT1G meets industry standards.
7.What is the process for return or replacement of SZSMS24CT1G?
All SZSMS24CT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZSMS24CT1G, 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 SZSMS24CT1G part is unused and in its original packaging.
Return procedure for SZSMS24CT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZSMS24CT1G Tags
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