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onsemi SZP6SMB27AT3G
- Part No.:
- SZP6SMB27AT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SZP6SMB27AT3G.pdf
- Description:
- TRANS VOLTAGE SUPPRESSOR DIODE,
- Quantity:
- Payment:
- Shipping:
Inventory:5,500
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Product details
Overview
SZP6SMB27AT3G from ON Semiconductor is a unidirectional 600 W peak power TVS diode designed for transient overvoltage protection in DC power rails and signal lines. It features a 23.1 V working peak reverse voltage (VRWM), 27.05 V nominal Zener breakdown voltage (VBR) at 1 mA test current, clamps to 37.5 V at 16 A peak pulse current (IPP), and delivers <1 ns response time with <5 µA leakage above VRWM. It is widely deployed in automotive power supply inputs and industrial I/O interfaces.
For engineers reviewing the SZP6SMB27AT3G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to system operating voltage, peak pulse current handling under ISO 7637-2 Pulse 1/2a/5a waveforms, thermal derating at elevated ambient temperatures, and UL 497B recognition for isolated loop circuit protection.
Technical Context
This device operates as a voltage-clamping transient suppressor placed in parallel with protected circuitry. Its silicon avalanche structure enables fast turn-on (<1 ns), low dynamic impedance, and stable breakdown characteristics across temperature (0.096 %/°C tempco). The unidirectional configuration supports DC-biased applications where reverse polarity protection is not required.
It is rated for 600 W non-repetitive peak pulse power (10/1000 µs waveform), withstands 100 A forward surge current (8.3 ms half-sine), and meets AEC-Q101 stress requirements for automotive underhood environments. Thermal resistance from junction-to-lead is 25 °C/W, enabling reliable operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W @ 10/1000 µs waveform - sustains high-energy transients without failure |
| Working Peak Reverse Voltage (VRWM) | 23.1 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Zener Breakdown Voltage (VBR) | 27.05 V @ 1 mA - precise threshold for avalanche conduction onset |
| Clamping Voltage (VC) | 37.5 V @ 16 A IPP - limits downstream voltage during surge events |
| Leakage Current (IR) | <5 µA @ 23.1 V - minimal standby power loss and signal integrity impact |
| Response Time | <1 ns - ensures suppression occurs before sensitive ICs experience overstress |
| ESD Rating | Class 3 (>16 kV HBM) - robust handling during board assembly and field operation |
Pinout & Package
Package: SMB (Case 403A), surface-mount, Pb-free, RoHS-compliant thermosetting plastic housing with cathode polarity band. Dimensions: 4.32 mm × 2.30 mm × 1.02 mm (L × W × H); modified L-bend leads for enhanced pad adhesion.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or clamping | Connected to lower-potential side of protected line (e.g., GND or return path) |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to higher-potential side (e.g., VBUS or signal line); marked by band |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood use including temperature cycling, humidity, and mechanical shock |
| UL 497B recognized | Approved for isolated loop circuit protection in telecom and industrial control systems |
| Low clamping ratio (VC/VBR) | 1.39 - tight voltage margin between breakdown and clamp improves system safety margin |
| SURMETIC® package | Void-free molded construction ensures long-term reliability and moisture resistance |
| Thermal derating support | Rated for 0.55 W at 25°C ambient, with 4.4 mW/°C linear derating above 25°C |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12 V battery-fed ECU power rail exposed to load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp surges before they reach DC-DC converters and microcontrollers. Use Value: Clamps to 37.5 V at 16 A, maintaining downstream ICs within absolute maximum ratings while surviving >100,000 surge events per AEC-Q101. |
Use Scenario: 24 V digital input channel on programmable logic controller subject to inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on field-side input, referenced to common ground. Use Value: Sub-1 ns response prevents latch-up in optocoupler input stages; UL 497B recognition validates use in safety-critical isolation barriers. |
| Medical Equipment Power Supply | Telecom Line Card Surge Protection |
Use Scenario: Auxiliary 5 V/3.3 V rail in diagnostic imaging equipment subjected to ESD and conducted noise from adjacent high-power modules. IC Role / Device Role / Timing Role: Localized clamping device at point-of-load regulator input. Use Value: 16 kV HBM ESD rating protects against operator contact discharge; low leakage avoids regulation error in precision analog subsystems. |
Use Scenario: Primary-side protection on Ethernet or RS-485 interface cards in central office equipment. IC Role / Device Role / Timing Role: First-line defense against lightning-induced surges entering via twisted-pair cabling. Use Value: 600 W peak power rating handles 10/700 µs telecom surge waveforms; SURMETIC® package ensures long-term stability in humid environments. |
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 | Lower peak power (400 W), higher VRWM (24 V), same SMB package | Marginally lower clamping (38.9 V @ 10.3 A) but reduced surge energy handling | Select when system surge energy is ≤400 W and tighter VRWM tolerance is needed |
| 1.5SMC27A | Higher package thermal resistance (RJA = 226 °C/W vs. 226 °C/W), identical electrical specs | Slightly lower power derating at elevated ambient; same UL/automotive qualifications | Prefer for cost-sensitive industrial designs where PCB layout allows larger copper area |
Compared with SZP6SMB27AT3G, SMAJ24A offers lower clamping voltage margin but reduced surge capacity, while 1.5SMC27A matches electrical performance but requires more careful thermal management due to identical RJA despite larger SMC footprint.
Availability
SZP6SMB27AT3G is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, and medical power supplies requiring stable component supply with full AEC-Q101 and UL 497B compliance.
Supply support for SZP6SMB27AT3G 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
ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensor, and discrete devices for automotive, industrial, and communications markets.
SZP6SMB27AT3G belongs to the P6SMB/SZP6SMB series of high-power unidirectional TVS diodes engineered for robust transient suppression in harsh environments where reliability, surge endurance, and regulatory certification are critical.
FAQ
What is the maximum clamping voltage of SZP6SMB27AT3G and under what test condition?
The maximum clamping voltage of SZP6SMB27AT3G is 37.5 V, measured at a peak pulse current (IPP) of 16 A using the standard 10/1000 µs double-exponential surge waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events and is guaranteed across the full operating temperature range.
Is SZP6SMB27AT3G suitable for automotive applications?
Yes, SZP6SMB27AT3G is AEC-Q101 qualified and PPAP capable, with testing covering temperature cycling, mechanical shock, humidity, and high-temperature reverse bias. Its 23.1 V VRWM aligns with 12 V automotive systems, and its 600 W surge rating meets ISO 7637-2 Pulse 5a requirements. The "SZ" prefix explicitly denotes automotive-grade process control and site qualification.
How does the thermal performance of SZP6SMB27AT3G compare to similar SMB TVS diodes?
SZP6SMB27AT3G has a junction-to-lead thermal resistance (RJL) of 25 °C/W and junction-to-ambient (RJA) of 226 °C/W on a standard FR-4 board with minimum recommended footprint. This enables 0.55 W continuous dissipation at 25°C ambient, with linear derating above that temperature - matching industry-standard SMB thermal behavior and supporting reliable operation in compact, high-density layouts.
Does SZP6SMB27AT3G meet UL 497B requirements for isolated loop protection?
Yes, the entire P6SMB/SZP6SMB series, including SZP6SMB27AT3G, holds UL 497B recognition (File #E210057, Category QVGQ2) for protectors used in isolated loop circuits. This certification covers dielectric withstand, strike voltage breakdown, endurance conditioning, and discharge testing - confirming suitability for telecom, process control, and safety-isolated industrial interfaces.
What is the polarity marking and physical orientation of SZP6SMB27AT3G on the PCB?
SZP6SMB27AT3G uses a cathode band (visible as a white or black stripe near one end) to identify the cathode terminal. When mounted on PCB, the banded end connects to the higher-potential node (e.g., VBUS or signal line), and the unbanded end connects to GND or return. Its SMB package (Case 403A) has modified L-bend leads oriented for standard 0.050″ pitch solder pads aligned with the cathode band on the left when viewed from top with marking side up.
SZP6SMB27AT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 16A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 700pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SZP6SMB27AT3G FAQ
1.How can I place an order for SZP6SMB27AT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZP6SMB27AT3G 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 SZP6SMB27AT3G reliable?
The price and inventory of SZP6SMB27AT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZP6SMB27AT3G is usually 5 days.
3.What payment methods are accepted for SZP6SMB27AT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZP6SMB27AT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZP6SMB27AT3G?
SZP6SMB27AT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZP6SMB27AT3G 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 SZP6SMB27AT3G?
For technical support, including SZP6SMB27AT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZP6SMB27AT3G requirements.
6.How does Aetrix verify that SZP6SMB27AT3G is sourced from the original manufacturer or authorized distributors?
All SZP6SMB27AT3G 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 SZP6SMB27AT3G meets industry standards.
7.What is the process for return or replacement of SZP6SMB27AT3G?
All SZP6SMB27AT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZP6SMB27AT3G, 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 SZP6SMB27AT3G part is unused and in its original packaging.
Return procedure for SZP6SMB27AT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZP6SMB27AT3G Tags
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