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onsemi 1N5368BG
- Part No.:
- 1N5368BG
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5368BG.pdf
- Description:
- DIODE ZENER 47V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,008
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Product details
Overview
1N5368BG from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 47 V, ±5% tolerance, maximum zener impedance of 25 Ω at 25 mA test current, and surge rating of 210 A at 8.3 ms. It operates as a precision voltage reference or overvoltage clamp in DC power supply regulation circuits.
For engineers reviewing the 1N5368BG datasheet, pinout, applications, or equivalent options, key selection criteria include its 47 V nominal breakdown voltage, 25 Ω dynamic impedance at IZT, 0.8 mA leakage at 35.8 V, thermal resistance of 25 °C/W (junction-to-lead), and Pb-free Surmetic 40 plastic package compatibility with wave and reflow soldering.
Technical Context
This device uses silicon-oxide passivated junction technology to achieve tight voltage tolerance and stable regulation under varying temperature and load conditions. Its zener voltage exhibits a positive temperature coefficient above 5.6 V, with typical TC of +0.095 %/°C at 47 V, enabling predictable drift compensation in reference designs.
The 1N5368BG supports pulsed operation up to 180 W for 8.3 ms and continuous dissipation of 5 W at TL = 25°C with 3/8″ lead length. Its cathode band polarity marking and axial lead configuration ensure unambiguous orientation during manual or automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44.65–49.35 V @ IZT = 25 mA; defines regulated output voltage range under nominal bias |
| Zener Impedance (ZZT) | 25 Ω max @ IZT = 25 mA; determines AC regulation stability and ripple rejection capability |
| Max DC Zener Current (IZM) | 210 mA; derived from PD/VZ(min), sets absolute upper limit for continuous conduction |
| Leakage Current (IR) | 0.8 mA max @ VR = 35.8 V; specifies off-state conduction loss in clamping applications |
| Junction-to-Lead Thermal Resistance (θJL) | 25 °C/W; enables thermal design using lead as heatsink path for 5 W dissipation |
| Surge Current (IRM) | 210 A @ 8.3 ms; defines single-pulse transient energy handling without failure |
| ESD Rating | Class 3 (>16 kV) HBM; ensures robustness against human-body electrostatic discharge during handling |
Pinout & Package
Package: Axial-lead Surmetic 40 plastic case (JEDEC Case 017AA), void-free transfer-molded thermosetting material, corrosion-resistant finish, cathode indicated by color band. Lead temperature rating: 260°C for 10 seconds at 1/16″ from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower potential side in reverse-biased regulation; establishes reference ground point in shunt regulator topology |
| Cathode | Zener breakdown terminal / Voltage regulation node | Connected to higher potential side; maintains fixed voltage drop across load when reverse biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Guarantees tight regulation window (44.65–49.35 V) without post-manufacturing trimming |
| 25 Ω max Zener impedance at 25 mA | Enables low-output-impedance reference behavior for high-precision analog feedback loops |
| 180 W surge rating at 8.3 ms | Supports transient overvoltage suppression in industrial power rails without external TVS staging |
| Pb-free Surmetic 40 package | Meets RoHS compliance requirements while maintaining mechanical robustness and solderability |
| −65°C to +200°C operating range | Validates use in extended-temperature environments including automotive engine compartments and outdoor telecom enclosures |
Applications
| Industrial Power Supply Regulation | Automotive ECU Reference Voltage |
|---|---|
Use Scenario: Stabilizing 48 V intermediate bus in programmable logic controller (PLC) backplane power distribution. IC Role / Device Role / Timing Role: Shunt voltage regulator providing precise 47 V reference for isolated DC-DC converter feedback networks. Use Value: Maintains ±1% output accuracy across −40°C to +85°C ambient with <25 Ω dynamic impedance limiting load-induced ripple. | Use Scenario: Generating stable bias voltage for sensor signal conditioning circuitry in engine control units. IC Role / Device Role / Timing Role: Zener reference source for analog-to-digital converter (ADC) reference divider networks. Use Value: Delivers 47 V reference with <0.8 mA leakage at 35.8 V, minimizing quiescent current draw in battery-sensitive systems. |
| Telecom Line Card Overvoltage Protection | Test Equipment Calibration Reference |
Use Scenario: Clamping induced transients on 48 V DC power feeds in base station line cards. IC Role / Device Role / Timing Role: Primary overvoltage protection element absorbing 210 A surges per IEC 61000-4-5 Level 4 testing. Use Value: Withstands 180 W non-repetitive pulses without degradation, eliminating need for secondary crowbar circuits. | Use Scenario: Serving as traceable voltage standard in benchtop multimeter calibration fixtures. IC Role / Device Role / Timing Role: Precision DC reference node in metrology-grade voltage divider assemblies. Use Value: Achieves <0.1% long-term stability due to oxide-passivated junction and ±5% initial tolerance, supporting NIST-traceable calibrations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5368B | Same electrical specs but SnPb lead finish; not RoHS-compliant | Restricted to legacy industrial equipment where Pb exemption applies | Select only if Pb-free requirement is waived and existing solder process is SnPb-optimized |
| MMSZ5276E | Surface-mount SOD-123 package; 47 V nominal, 500 mW rating; 30 Ω ZZT | Lower power handling (500 mW vs. 5 W); unsuitable for high-current shunt regulation | Choose for space-constrained PCBs where thermal management allows derated operation |
Compared with 1N5368BG, the 1N5368B offers identical regulation performance but lacks RoHS compliance, while MMSZ5276E trades power capability and thermal robustness for miniaturization-making 1N5368BG optimal for high-reliability, high-power shunt regulation where axial-lead mounting and 5 W dissipation are required.
Availability
1N5368BG is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive ECU reference voltage generation, and telecom line card overvoltage protection requiring stable component supply across extended temperature ranges and high-surge environments.
Supply support for 1N5368BG 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, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N53 Series belongs to onsemi's discrete Zener diode product line, engineered for high-stability voltage regulation and transient suppression in demanding power systems where reliability and thermal resilience are critical.
FAQ
What is the nominal zener voltage and tolerance of the 1N5368BG?
The 1N5368BG has a nominal zener voltage of 47 V with a guaranteed tolerance of ±5%, corresponding to a minimum of 44.65 V and maximum of 49.35 V at IZT = 25 mA. This tight tolerance is specified per JEDEC standards and reflects the device's oxide-passivated junction construction, ensuring consistent regulation across production lots without post-assembly trimming.
How does the 1N5368BG handle thermal dissipation in continuous operation?
The 1N5368BG is rated for 5 W steady-state power dissipation at lead temperature (TL) = 25°C with 3/8″ lead length, with thermal resistance θJL = 25 °C/W. Engineers must calculate junction temperature using TJ = TL + (PD × θJL) and ensure TJ remains ≤150°C for DC operation. Derating is required above 25°C ambient per the 40 mW/°C curve in the datasheet.
What is the maximum surge current rating for the 1N5368BG and under what conditions?
The 1N5368BG supports a peak non-repetitive surge current of 210 A at an 8.3 ms pulse width, per IEC 61000-4-5 testing methodology. This rating assumes single-event application with no repetition; repeated surges require thermal recovery time and may reduce effective lifetime. The surge capability is validated using square-wave pulses with defined mounting contact geometry per datasheet Note 4.
Does the 1N5368BG meet RoHS requirements, and what does the "G" suffix indicate?
Yes, the 1N5368BG is RoHS-compliant. The "G" suffix explicitly denotes a Pb-free package per onsemi's packaging nomenclature, confirmed in the Ordering Information section of the datasheet. This includes lead-free solderability validation at 260°C for 10 seconds and full compliance with EU Directive 2011/65/EU and related amendments.
What is the zener impedance of the 1N5368BG and why does it matter in circuit design?
The 1N5368BG has a maximum zener impedance (ZZT) of 25 Ω at IZT = 25 mA. This value directly impacts regulation accuracy under varying load currents: lower ZZT means less voltage deviation for a given ΔIZ, improving ripple rejection and stability in feedback-controlled power supplies. It also affects noise performance and transient response in precision reference applications.
1N5368BG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 35.8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N5368BG FAQ
1.How can I place an order for 1N5368BG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5368BG 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 1N5368BG reliable?
The price and inventory of 1N5368BG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5368BG is usually 5 days.
3.What payment methods are accepted for 1N5368BG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5368BG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5368BG?
1N5368BG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5368BG 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 1N5368BG?
For technical support, including 1N5368BG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5368BG requirements.
6.How does Aetrix verify that 1N5368BG is sourced from the original manufacturer or authorized distributors?
All 1N5368BG 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 1N5368BG meets industry standards.
7.What is the process for return or replacement of 1N5368BG?
All 1N5368BG units undergo pre-shipment inspection (PSI). If there is an issue with 1N5368BG, 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 1N5368BG part is unused and in its original packaging.
Return procedure for 1N5368BG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5368BG Tags
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