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onsemi 1SMF5920BT1G
- Part No.:
- 1SMF5920BT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
1SMF5920BT1G.pdf
- Description:
- DIODE ZENER 6.2V 2.5W SOD123FL
- Quantity:
- Payment:
- Shipping:
Inventory:8,124
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Product details
Overview
1SMF5920BT1G from onsemi is a 2.5 W unidirectional Zener diode in SOD−123FL package, with nominal Zener voltage 6.2 V, maximum clamping voltage 10.0 V at 24.8 A peak pulse current, and ESD rating >16 kV (HBM). It serves as overvoltage protection and voltage reference in portable power rails.
For engineers reviewing the 1SMF5920BT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), dynamic impedance (2.0 Ω @ 60.5 mA), thermal resistance (350 °C/W), and RoHS-compliant matte tin lead finish.
Technical Context
This device operates as a unidirectional transient voltage suppressor (TVS) with Zener breakdown mechanism, optimized for fast response to ESD and surge events. Its 6.2 V nominal Zener voltage is specified at 60.5 mA test current, with tight 5.89–6.51 V min/max range and low 2.0 Ω dynamic impedance at IZT.
Thermal design relies on its 350 °C/W junction-to-ambient resistance (FR-4 board, minimum pad), derating linearly above 25°C. The SOD−123FL package supports reflow up to 260°C and meets MSL 1, enabling high-volume automated assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2 V nominal, 5.89–6.51 V range @ 60.5 mA - ensures stable reference or clamp threshold in 5 V–6 V rail protection |
| Peak Pulse Current (IPP) | 24.8 A @ 10/1000 μs waveform - supports IEC 61000-4-5 Level 3 surge immunity |
| Clamping Voltage (VC) | 10.0 V max @ IPP - limits downstream IC stress during transient events |
| Dynamic Impedance (ZZT) | 2.0 Ω @ 60.5 mA - minimizes voltage deviation under varying load current |
| ESD Rating (HBM) | Class 3 (>16 kV) - satisfies IEC 61000-4-2 Level 4 for handheld interface ports |
| Power Dissipation | 2.5 W @ TA = 25°C - enables compact placement without forced cooling in space-constrained PCBs |
| Package | SOD−123FL (Case 498), 1.65 × 2.70 × 0.90 mm - footprint area 8.45 mm², height ≤1.0 mm for ultra-thin mobile designs |
Pinout & Package
SOD−123FL surface-mount package with cathode indicated by polarity band; leads oriented in tape with cathode toward sprocket holes. Mounting position unrestricted; qualified for 260°C reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener anode connection point | Connected to protected node (e.g., USB VBUS); reverse-biased during clamping |
| 2 (Anode) | Zener cathode connection point | Connected to ground or lower-potential rail; provides return path during surge conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD−123FL package | Height ≤1.0 mm enables integration into <9 mm thick smartphones and wearables |
| High ESD robustness | Class 3 HBM (>16 kV) eliminates need for external ESD diodes on USB/SDIO lines |
| Tight Zener voltage tolerance | ±5% (5.89–6.51 V) ensures predictable clamping without margin stacking in 5 V systems |
| Pb-free, halogen-free construction | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 1 marking |
| Low dynamic impedance | 2.0 Ω at 60.5 mA maintains clamping voltage stability across production lots and temperature |
Applications
| USB 2.0 Data Line Protection | Smartphone Battery Input Clamp |
|---|---|
Use Scenario: Protecting D+ and D− lines against ESD events during cable insertion and hot-plug. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between data line and ground, conducting only during negative transients. Use Value: Clamps transients to ≤10.0 V while maintaining signal integrity due to low 8.45 mm² footprint and minimal parasitic capacitance. | Use Scenario: Limiting input voltage spikes on Li-ion battery charging circuits exposed to automotive or adapter surges. IC Role / Device Role / Timing Role: Zener-based overvoltage clamp connected between battery terminal and system ground. Use Value: Absorbs 24.8 A peak pulses without degradation, preserving battery management IC reliability under ISO 7637-2 pulse 1/2a conditions. |
| POS Terminal Keypad Interface | Industrial Sensor Signal Conditioning |
Use Scenario: Shielding membrane keypad traces from user-induced ESD in retail payment terminals. IC Role / Device Role / Timing Role: Low-leakage (<5 µA) Zener diode shunting keypad scan lines to ground. Use Value: Prevents false keypresses and microcontroller resets with <5 µA IR at VRWM, ensuring no DC loading on 3.3 V logic lines. | Use Scenario: Stabilizing excitation voltage for bridge-type pressure sensors in factory automation modules. IC Role / Device Role / Timing Role: Precision 6.2 V Zener reference providing bias to sensor Wheatstone bridge. Use Value: Delivers ±5% voltage accuracy and 2.0 Ω dynamic impedance for <0.1% full-scale error in 24-bit ADC measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5920BRLG | Same Zener voltage (6.2 V), but DO-41 through-hole package; higher RJA (500 °C/W); no MSL rating | Requires wave soldering; unsuitable for high-density SMT layouts or thin-profile devices | Select when legacy through-hole assembly or manual repair is required; avoid for new SMT designs |
| SMBJ6.0A | 6.0 V working voltage, 100 W peak power, larger SMB package; higher VC (10.3 V); higher capacitance | Better for high-energy surges (IEC 61000-4-5), but excessive for ESD-only use; may distort high-speed signals | Choose for industrial AC-line surge suppression; not recommended for USB or sensor analog lines |
Compared with 1SMF5920BT1G, 1N5920BRLG trades miniaturization for ease of hand-soldering, while SMBJ6.0A sacrifices footprint and signal fidelity for higher surge energy handling-making 1SMF5920BT1G optimal for space-constrained, ESD-critical consumer interfaces.
Availability
1SMF5920BT1G is available at Aetrix Electronics and suitable for USB interface protection, smartphone battery input clamping, and industrial sensor reference applications requiring stable component supply across high-mix production runs.
Supply support for 1SMF5920BT1G 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, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1SMF5920BT1G belongs to onsemi's SMF series of 2.5 W Zener TVS diodes, engineered specifically for ultra-compact, high-reliability overvoltage protection in portable electronics and IoT edge nodes.
FAQ
What is the Zener voltage tolerance of the 1SMF5920BT1G?
The 1SMF5920BT1G has a Zener voltage tolerance of ±5%, with a specified range of 5.89 V to 6.51 V at 60.5 mA test current and 25°C ambient. This tight tolerance ensures consistent clamping behavior across production lots and supports precise voltage reference use in sensor biasing and regulator feedback paths without additional trimming components.
Does the 1SMF5920BT1G meet RoHS and REACH requirements?
Yes, the 1SMF5920BT1G is Pb-free, halogen-free/BFR-free, and fully compliant with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Its matte tin lead finish and void-free thermosetting epoxy package meet UL 94 V-0 flammability standards, supporting environmentally regulated manufacturing in Europe, North America, and Asia.
What is the maximum clamping voltage of the 1SMF5920BT1G during a surge event?
The 1SMF5920BT1G has a maximum clamping voltage (VC) of 10.0 V at its rated peak pulse current of 24.8 A (10/1000 μs waveform). This value is guaranteed across temperature and process variation, ensuring downstream ICs operating at 5 V or 3.3 V remain within safe absolute maximum ratings during transient overvoltage events.
Can the 1SMF5920BT1G be used for bidirectional ESD protection?
No, the 1SMF5920BT1G is a unidirectional Zener diode designed for single-polarity clamping (anode-to-ground configuration). For bidirectional protection-such as on AC-coupled signal lines like HDMI or Ethernet-use a dedicated bidirectional TVS like the ESD9X5.0ST5G. Using two 1SMF5920BT1G devices in series opposition is not recommended due to mismatched leakage and breakdown characteristics.
What is the thermal resistance of the 1SMF5920BT1G when mounted on a standard FR-4 PCB?
When mounted on a standard FR-4 PCB with recommended minimum pad size, the 1SMF5920BT1G exhibits a junction-to-ambient thermal resistance (RJA) of 350 °C/W. This value assumes natural convection and defines the maximum steady-state power dissipation (2.5 W at 25°C) before junction temperature exceeds 150°C. Derating is linear at 2.9 mW/°C above 25°C ambient.
1SMF5920BT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 2.5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 200 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123FL
1SMF5920BT1G FAQ
1.How can I place an order for 1SMF5920BT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMF5920BT1G 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 1SMF5920BT1G reliable?
The price and inventory of 1SMF5920BT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMF5920BT1G is usually 5 days.
3.What payment methods are accepted for 1SMF5920BT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMF5920BT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMF5920BT1G?
1SMF5920BT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMF5920BT1G 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 1SMF5920BT1G?
For technical support, including 1SMF5920BT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMF5920BT1G requirements.
6.How does Aetrix verify that 1SMF5920BT1G is sourced from the original manufacturer or authorized distributors?
All 1SMF5920BT1G 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 1SMF5920BT1G meets industry standards.
7.What is the process for return or replacement of 1SMF5920BT1G?
All 1SMF5920BT1G units undergo pre-shipment inspection (PSI). If there is an issue with 1SMF5920BT1G, 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 1SMF5920BT1G part is unused and in its original packaging.
Return procedure for 1SMF5920BT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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