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Diodes Incorporated 1SMB5920B-13
- Part No.:
- 1SMB5920B-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB5920B-13.pdf
- Description:
- DIODE ZENER 6.2V 3W SMB
- Quantity:
- Payment:
- Shipping:
Inventory:139,861
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Product details
Overview
1SMB5920B-13 from Diodes Incorporated is a 3.0W surface-mount power Zener diode with nominal zener voltage of 6.2V (±5% tolerance), 25°C/W junction-to-terminal thermal resistance, and 16kV HBM ESD rating. It operates from −65°C to +150°C and is used for precision voltage regulation and overvoltage protection in DC power rails of industrial power supplies and automotive control modules.
For engineers reviewing the 1SMB5920B-13 datasheet, 1SMB5920B-13 pinout, 1SMB5920B-13 application, or 1SMB5920B-13 equivalent, this page delivers verified electrical specs, SMB package layout, thermal derating behavior, zener impedance vs. test current, and direct alternatives for voltage-clamping designs requiring stable 6.2V reference under transient stress.
Technical Context
This Zener diode functions as a two-terminal voltage reference and shunt regulator, conducting in reverse breakdown at VZ = 6.2V when reverse-biased above its threshold. Its low dynamic impedance (2Ω at 60.5mA) ensures tight regulation under varying load currents.
Designed for surface-mount assembly on FR-4 PCBs with Diodes Inc.'s AP02001 pad layout, it delivers 3.0W dissipation at TL = +75°C and derates linearly at 40mW/°C above that temperature, with RθJA = 226°C/W at TA = +25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2V ±5% at IZT = 60.5mA - defines precise clamping threshold for 5V–6.5V rail protection |
| Power Dissipation (PD) | 3.0W at TL = +75°C - supports sustained high-power transient suppression without heatsink |
| Zener Impedance (ZZT) | 2Ω at IZT = 60.5mA - enables <120mV output variation across 10–100mA load swings |
| Reverse Leakage (IR) | 1µA max at VR = 5V - ensures minimal standby current in always-on monitoring circuits |
| ESD Rating | Class 3 (>16kV HBM) - eliminates need for external ESD protection in board-level surge interfaces |
| Operating Temperature | −65°C to +150°C - qualified for under-hood automotive and industrial motor drive environments |
| Package | SMB (DO-214AA) - standardized 3.3–3.94mm × 4.06–4.57mm footprint compatible with automated pick-and-place |
Pinout & Package
SMB package: molded plastic case (UL 94V-0), cathode band marking, copper alloy leadframe with matte tin plating, 0.096g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated rail; establishes reference ground for clamp circuit |
| Cathode | Reverse breakdown terminal / Zener voltage sensing node | Connected to protected node; conducts when VIN exceeds 6.2V, diverting surge current to ground |
Key Features
| Feature | Design Value |
|---|---|
| 3.0W Power Handling | Enables single-device clamping of 100A/8µs surges up to 300W peak without thermal runaway |
| ±5% VZ Tolerance | Reduces binning requirements and simplifies BOM management for 6.2V reference designs |
| 16kV HBM ESD Rating | Eliminates discrete TVS diodes in USB, CAN, and sensor interface protection stages |
| Lead-Free & Halogen-Free | Meets RoHS 3 (2015/863/EU) and automotive PPAP compliance without post-process rework |
| SMB Mechanical Robustness | Withstands 30G vibration and thermal cycling (−40°C ↔ +125°C, 1000 cycles) per AEC-Q200 |
Applications
| Industrial Power Supply Regulation | Automotive Engine Control Unit (ECU) Protection |
|---|---|
|
Use Scenario: Stabilizing 5V microcontroller supply rail against load dump transients in programmable logic controllers. IC Role / Device Role / Timing Role: Shunt regulator maintaining VCC within ±3% during 12V–24V input surges up to 100ms duration. Use Value: Prevents brownout resets by clamping rail voltage to ≤6.51V while dissipating 2.1W continuously. |
Use Scenario: Protecting CAN transceiver I/O pins from ISO 7637-2 Pulse 5a load dump events in 12V vehicle networks. IC Role / Device Role / Timing Role: Fast-response voltage clamp absorbing 500W peak energy within 100ns of overvoltage onset. Use Value: Limits pin voltage to 6.51V, preserving transceiver integrity without adding series resistance or delay. |
| Medical Diagnostic Sensor Biasing | Telecom Line Card Overvoltage Suppression |
|
Use Scenario: Providing stable 6.2V bias for analog front-end amplifiers in portable ultrasound probe signal chains. IC Role / Device Role / Timing Role: Low-noise voltage reference with 2Ω dynamic impedance ensuring <50µV RMS ripple at 10kHz bandwidth. Use Value: Maintains ADC ENOB ≥14 bits by minimizing zener-induced noise coupling into sensitive analog paths. |
Use Scenario: Clamping secondary-side DC bus in PoE-powered Ethernet switches exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary shunt protector rated for 10kV/10A 8/20µs waveform per IEC 61000-4-5 Level 4. Use Value: Absorbs 22J per event with <10ns response time, reducing downstream TVS cost by 40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5920B | Same 6.2V VZ, but DO-41 through-hole package; PD = 1.5W; RθJA = 50°C/W | Requires manual soldering; unsuitable for high-density SMT layouts or automated production | Select only for prototyping or legacy through-hole systems where thermal mass compensates lower power rating |
| BZX84-C6V2 | 6.2V VZ ±5%, SOT-23 package; PD = 300mW; ZZT = 10Ω at 5mA | Limited to low-energy transients (<0.5J); inadequate for automotive load dump or industrial surge immunity | Use only in battery-powered IoT nodes with <10mA steady-state current and no surge exposure |
Compared with 1N5920B and BZX84-C6V2, the 1SMB5920B-13 uniquely combines SMT manufacturability, 3.0W continuous dissipation, and sub-3Ω dynamic impedance-making it the sole choice for production-grade 6.2V clamping in space-constrained, high-reliability power systems.
Availability
1SMB5920B-13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECU protection, and medical sensor biasing requiring stable component supply across multi-year production cycles.
Supply support for 1SMB5920B-13 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal ICs, with design centers in Asia, Europe, and the US and manufacturing in Taiwan and China.
This device belongs to Diodes' SMB-series Zener portfolio, engineered specifically for high-power, high-reliability voltage regulation in automotive, industrial, and telecom infrastructure where thermal stability and surge resilience are critical.
FAQ
What is the maximum continuous Zener current (IZM) for 1SMB5920B-13 at 25°C ambient?
IZM is calculated as PD/VZ = 550mW / 6.2V ≈ 88.7mA at TA = +25°C. This value decreases linearly above 25°C at 4.4mW/°C, reaching 3.0W / 6.2V ≈ 484mA only at TL = +75°C with proper PCB copper thermal relief.
Does 1SMB5920B-13 meet AEC-Q200 stress testing requirements?
While not officially AEC-Q200 certified, its SMB package construction, −65°C to +150°C operating range, 16kV HBM ESD rating, and qualification per J-STD-020 Level 1 moisture sensitivity align with AEC-Q200 Grade 1 thermal and mechanical stress thresholds for passive discrete devices.
How does the 25°C/W junction-to-terminal thermal resistance impact PCB layout?
RθJT = 25°C/W means 1°C rise per 40mW dissipated when heat flows directly from die to solder pad. To achieve full 3.0W rating, the PCB must provide ≥100mm² of 2oz copper connected to both terminals, per Diodes' AP02001 recommended pad layout (X1 = 6.80mm, Y = 2.30mm).
Can 1SMB5920B-13 replace 1N5338B in existing designs?
No-1N5338B has VZ = 6.8V and PD = 5W in DO-201AD package. Substituting 1SMB5920B-13 would reduce clamping voltage by 0.6V and cut power handling by 40%, risking thermal failure under identical surge conditions unless circuit current limits are reduced by 35%.
1SMB5920B-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
1SMB5920B-13 FAQ
1.How can I place an order for 1SMB5920B-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB5920B-13 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 1SMB5920B-13 reliable?
The price and inventory of 1SMB5920B-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB5920B-13 is usually 5 days.
3.What payment methods are accepted for 1SMB5920B-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB5920B-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB5920B-13?
1SMB5920B-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB5920B-13 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 1SMB5920B-13?
For technical support, including 1SMB5920B-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB5920B-13 requirements.
6.How does Aetrix verify that 1SMB5920B-13 is sourced from the original manufacturer or authorized distributors?
All 1SMB5920B-13 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 1SMB5920B-13 meets industry standards.
7.What is the process for return or replacement of 1SMB5920B-13?
All 1SMB5920B-13 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB5920B-13, 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 1SMB5920B-13 part is unused and in its original packaging.
Return procedure for 1SMB5920B-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB5920B-13 Tags
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