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onsemi SZSMS15T1G
- Part No.:
- SZSMS15T1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
SZSMS15T1G.pdf
- Description:
- ESD / SURGE PROTECTOR
- Quantity:
- Payment:
- Shipping:
Inventory:6,027
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Product details
Overview
SZSMS15T1G from onsemi is a quad unidirectional ESD and surge protector in SC-74 package, rated for 15 V working peak reverse voltage (VRWM), 24 V clamping voltage (VC) at 12 A peak pulse current, and 350 W peak pulse power (8 × 20 µs). It delivers Class N ESD protection (>25 kV HBM), IEC 61000-4-2 (15 kV air/8 kV contact), and AEC-Q101 qualification for automotive electronics.
For engineers reviewing the SZSMS15T1G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin vs. protected IC VCC, capacitance (60–125 pF) for high-speed signal integrity, AEC-Q101 compliance for automotive use, and SC-74 footprint compatibility with layout-constrained portable designs.
Technical Context
The SZSMS15T1G integrates four independent unidirectional TVS diodes in a single SC-74 (Case 318F) monolithic silicon die. Each channel provides precise breakdown at 16.7–18.5 V (VBR), clamps transients to ≤24 V at 12 A (IPP), and exhibits low leakage (<1 µA at VRWM = 15 V).
Its surge response follows the IEC 61000-4-5 standard (23 A, 8/20 µs), with thermal resistance RJA = 556 °C/W enabling operation from −55 °C to +150 °C. The device uses Zener-based avalanche structure-not silicon-controlled rectifier (SCR) or polymer-ensuring predictable, non-latching behavior during repeated surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected line voltage. |
| VBR (min/typ/max) | 16.7 / 17.5 / 18.5 V - Breakdown threshold at 1 mA test current; defines onset of transient conduction. |
| VC @ IPP = 12 A | 24 V - Clamped voltage during 8/20 µs surge; must stay below protected IC's absolute maximum rating. |
| IPP (max) | 350 W peak power (8 × 20 µs) - Sustains 23 A surge per IEC 61000-4-5; determines robustness against lightning-induced transients. |
| Capacitance @ 0 V, 1 MHz | 60–125 pF - Impacts signal rise time and insertion loss on USB, HDMI, or data lines; lower end preferred for >100 Mbps interfaces. |
| ESD Rating (HBM) | >25 kV - Exceeds Class N per JESD22-A114; protects against human-body discharge without degradation. |
| IEC 61000-4-2 | 15 kV (air), 8 kV (contact) - Validated immunity level for handheld and industrial equipment front-panel interfaces. |
Pinout & Package
Package: SC-74 (Case 318F), surface-mount, 6-pin, Pb-free, RoHS-compliant. Dimensions per onsemi drawing 98ASB42973B (2.0 × 1.25 × 0.9 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Common cathode connection for Channel 1; ties to system ground or low-impedance return path. |
| 2 | Anode | Anode of Channel 1; connects to protected signal line (e.g., USB D+). |
| 3 | Cathode | Cathode of Channel 2; shared cathode node for parallel grounding of multiple channels. |
| 4 | Cathode | Cathode of Channel 3; enables compact multi-line protection with single ground trace. |
| 5 | Anode | Anode of Channel 2; routes to second protected line (e.g., USB D−). |
| 6 | Cathode | Cathode of Channel 4; completes quad-channel configuration with minimal PCB real estate. |
Key Features
| Feature | Design Value |
|---|---|
| Quad unidirectional topology | Four independent TVS paths in one SC-74 footprint-reduces board area by ~60% vs. discrete diodes and avoids inter-channel crosstalk. |
| AEC-Q101 qualified | Validated for automotive underhood and infotainment applications; supports PPAP documentation and zero-defect manufacturing requirements. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Ensures tight voltage margin between clamping and protected IC's max rating-critical for 3.3 V or 5 V logic rails. |
| UL 94 V-0 flammability rating | Self-extinguishing epoxy package meets safety standards for consumer and medical devices requiring fire resistance. |
| 100% lead (Pb)-free and RoHS compliant | Enables global market access and simplifies compliance reporting for OEMs shipping to EU, China, and Korea. |
Applications
| USB 2.0 Interface Protection | Automotive Infotainment Display Port |
|---|---|
Use Scenario: Protecting USB D+/D− lines in notebook docking stations against ESD events during hot-plug insertion. IC Role / Device Role: Unidirectional TVS array clamping transients to <24 V while maintaining <125 pF capacitance for full-speed (480 Mbps) signal fidelity. Use Value: Prevents latch-up or damage to USB transceivers (e.g., TUSB2036) without degrading eye diagram integrity or requiring series impedance tuning. | Use Scenario: Safeguarding LVDS or FPD-Link II video data lanes between head unit and TFT display in vehicles. IC Role / Device Role: Quad-channel surge suppression on differential pairs exposed to load-dump and ISO 7637-2 pulses in 12 V automotive systems. Use Value: Maintains AEC-Q101 compliance and withstands 23 A IEC 61000-4-5 surges-enabling single-device protection across all four video lanes. |
| Industrial Handheld Scanner Port | Medical Patient Monitor Keypad Interface |
Use Scenario: Shielding RS-232 or UART lines in rugged barcode scanners subjected to frequent ESD in warehouse environments. IC Role / Device Role: Low-leakage (<1 µA) unidirectional clamp on TX/RX lines, preserving signal swing and minimizing standby current drain. Use Value: Eliminates need for external series resistors or RC filters-reducing BOM count and ensuring reliable communication after >25 kV HBM discharges. | Use Scenario: Protecting membrane keypad traces in Class II medical devices where patient contact mandates reinforced insulation and low leakage. IC Role / Device Role: UL 94 V-0 rated, biocompatible-package TVS preventing electrostatic discharge from compromising touch sensitivity or safety isolation. Use Value: Meets IEC 60601-1 creepage/clearance requirements while delivering >25 kV ESD immunity without compromising low-power sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD and surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMS15T1G | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and SC-74 pinout. | Not suitable for automotive production; acceptable for industrial or consumer prototypes. | Select SMS15T1G only when AEC-Q101 documentation and PPAP support are not required. |
| TPD4E05U06DQAR | Lower VRWM (5.5 V); 12 pF typical capacitance; 3.6 V clamping at 1 A; 6-pin SON package (1.45 × 1.0 mm). | Better suited for high-speed USB 3.0 or MIPI lines; insufficient for 15 V rail protection. | Choose TPD4E05U06DQAR only for sub-6 V interfaces demanding ultra-low capacitance-not as direct replacement for SZSMS15T1G. |
Compared with SMS15T1G and TPD4E05U06DQAR, SZSMS15T1G uniquely combines AEC-Q101 qualification, 15 V VRWM, and quad-channel integration in SC-74-making it the only option for automotive 12 V system data line protection requiring production-grade reliability and standardized compliance evidence.
Availability
SZSMS15T1G is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial handheld scanners, and medical patient monitor interfaces requiring stable component supply, long-term lifecycle assurance, and AEC-Q101 traceability.
Supply support for SZSMS15T1G 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 focused on energy-efficient electronics, with leadership in automotive, industrial, cloud, and sensing solutions.
The SMS05T1 Series-including SZSMS15T1G-is engineered specifically for board-level ESD/surge protection in space-constrained, high-reliability applications where AEC-Q101 validation and predictable clamping performance are mandatory.
FAQ
What is the maximum working voltage supported by SZSMS15T1G?
SZSMS15T1G supports a maximum working peak reverse voltage (VRWM) of 15 V. This means it can be continuously applied across the anode-cathode terminals without entering conduction-ideal for protecting 12 V automotive data lines or 15 V industrial sensor interfaces. Operating above 15 V risks premature clamping and accelerated wear.
Is SZSMS15T1G pin-compatible with SMS15T1G?
Yes, SZSMS15T1G is pin-compatible with SMS15T1G-both share identical SC-74 package dimensions, pin assignment (Pin 1 = Cathode, Pin 2 = Anode, etc.), and electrical characteristics. The "SZ" prefix denotes automotive qualification (AEC-Q101, PPAP-capable), while SMS15T1G is commercial-grade; no PCB layout change is needed when upgrading.
What is the clamping voltage of SZSMS15T1G under surge conditions?
SZSMS15T1G clamps to 24 V maximum at 12 A peak pulse current (8 × 20 µs waveform), per its datasheet. This value ensures protected downstream ICs-such as USB transceivers or LVDS receivers rated for 25–30 V absolute maximum-remain within safe operating limits during IEC 61000-4-5 surge events.
Does SZSMS15T1G meet automotive qualification standards?
Yes, SZSMS15T1G is AEC-Q101 qualified and PPAP-capable. It undergoes stress testing including temperature cycling, humidity bias, and high-temperature operating life per AEC-Q101 Rev D, making it suitable for automotive infotainment, ADAS camera links, and body control module interfaces.
How does the capacitance of SZSMS15T1G affect high-speed signal lines?
SZSMS15T1G exhibits 60–125 pF capacitance at 0 V bias and 1 MHz, which may attenuate edge rates on signals above ~10 Mbps. For USB 2.0 (480 Mbps), this is acceptable with proper layout; for USB 3.0 or MIPI D-PHY, lower-capacitance alternatives like TPD4E05U06DQAR (12 pF) are recommended instead of SZSMS15T1G.
SZSMS15T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SC-74, SOT-457
- Series:
- SMS05T1
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 29V
- Current - Peak Pulse (10/1000µs):
- 12A
- Power - Peak Pulse:
- 350W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 60pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-74
SZSMS15T1G FAQ
1.How can I place an order for SZSMS15T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZSMS15T1G 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 SZSMS15T1G reliable?
The price and inventory of SZSMS15T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZSMS15T1G is usually 5 days.
3.What payment methods are accepted for SZSMS15T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZSMS15T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZSMS15T1G?
SZSMS15T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZSMS15T1G 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 SZSMS15T1G?
For technical support, including SZSMS15T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZSMS15T1G requirements.
6.How does Aetrix verify that SZSMS15T1G is sourced from the original manufacturer or authorized distributors?
All SZSMS15T1G 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 SZSMS15T1G meets industry standards.
7.What is the process for return or replacement of SZSMS15T1G?
All SZSMS15T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZSMS15T1G, 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 SZSMS15T1G part is unused and in its original packaging.
Return procedure for SZSMS15T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZSMS15T1G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
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ESD5Z3.3T1G
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D5V0H1B2LP-7B
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D5V0P1B2LP-7B
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DESD5V0U1BA-7
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ESD5Z5.0T1G
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
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D5V0L1B2WS-7
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