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onsemi 1N5344BG
- Part No.:
- 1N5344BG
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5344BG.pdf
- Description:
- DIODE ZENER 8.2V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:740
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Product details
Overview
1N5344BG from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 8.2 V, ±5% tolerance, 150 Ω maximum zener impedance at 1.5 mA test current, and 6.2 V minimum zener voltage at 1 A surge. It operates as a precision voltage reference or shunt regulator in DC power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N5344BG datasheet, pinout, applications, or equivalent options, key selection criteria include its 8.2 V nominal regulation, 5 W steady-state power rating, 180 W 8.3 ms surge capability, Pb-free Surmetic 40 package, and temperature coefficient behavior across operating range.
Technical Context
This device uses silicon-oxide passivated junction technology to achieve tight voltage tolerance (±5%), low leakage (≤0.2 µA at 6.2 V), and stable regulation under varying load and thermal conditions. Its axial lead construction and transfer-molded plastic case (Case 017AA) provide mechanical robustness and environmental protection.
The 1N5344BG delivers regulated output by maintaining reverse breakdown conduction above its specified zener voltage, with dynamic impedance defined at both IZT = 1.5 mA (150 Ω max) and IZK = 1 mA (200 Ω max). Junction-to-lead thermal resistance is 25 °C/W at TL = 25°C with 3/8″ lead length.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 8.2 V - precise DC reference point for shunt regulation at 1.5 mA test current |
| Zener Voltage Range | 7.79 V to 8.61 V - guaranteed regulation window under ±5% tolerance at 25°C |
| Max Zener Impedance | 150 Ω @ IZT - ensures minimal output voltage deviation under small-signal load changes |
| Steady-State Power | 5 W @ TL = 25°C - defines maximum continuous dissipation before thermal derating applies |
| Surge Rating | 180 W @ 8.3 ms - supports transient overvoltage clamping without failure |
| Leakage Current | ≤0.2 µA @ VR = 6.2 V - enables low-power standby operation with minimal quiescent loss |
| Junction Temp Range | −65°C to +200°C - allows operation in extended industrial and automotive environments |
Pinout & Package
Package: Axial-lead, transfer-molded plastic (Case 017AA), cathode indicated by band. Dimensions: 8.38–8.89 mm length × 3.30–3.68 mm diameter, leads 25.4–31.75 mm long.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / high-side connection | Connected to input rail; regulates voltage by sinking current when exceeding 8.2 V |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free Surmetic 40 Package | RoHS-compliant axial lead construction with corrosion-resistant finish and solderable leads |
| ESD Robustness | Class 3 (>16 kV HBM) - withstands handling and board-level electrostatic discharge events |
| Tight Parameter Control | Guaranteed limits on six electrical parameters including VZ, ZZT, ZZK, IZK, IR, and IZM |
| High Surge Withstand | 180 W non-repetitive surge rating at 8.3 ms - protects downstream circuitry during line transients |
| Thermal Stability | 25 °C/W junction-to-lead thermal resistance - enables predictable thermal design with standard lead mounting |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator or switching converter output stage. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 8.2 V setpoint for error amplifier comparison. Use Value: Maintains ±1% output accuracy over temperature and load variations due to low dynamic impedance and tight VZ tolerance. |
Use Scenario: Clamping transient spikes on 12 V automotive or industrial bus lines. IC Role / Device Role / Timing Role: Fast-acting crowbar element that conducts above 8.61 V to divert surge energy. Use Value: Survives 180 W/8.3 ms surges without degradation, protecting sensitive downstream ICs from damage. |
| Reference Voltage Source | Current-Limited Bias Generator |
Use Scenario: Generating stable bias for op-amp comparators or sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Low-noise, low-drift DC reference node with minimal temperature coefficient drift. Use Value: Delivers <0.2 µA leakage at 6.2 V, enabling microamp-level bias networks with negligible error contribution. |
Use Scenario: Providing fixed current to LED strings or transistor base drive in discrete logic interfaces. IC Role / Device Role / Timing Role: Constant-current sink using series resistor and 8.2 V regulation threshold. Use Value: Enables predictable 1–2 mA bias currents with <5% variation across production lots and temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5344B | Same electrical specs but SnPb lead finish; not RoHS-compliant | Identical regulation performance; unsuitable for Pb-free manufacturing | Select 1N5344B only if legacy SnPb assembly process is required and RoHS exemption applies |
| BZX85C8V2 | 5 W rating, same 8.2 V nominal, but higher ZZT (200 Ω max) and wider tolerance (±10%) | Lower precision and stability; acceptable where cost sensitivity outweighs regulation accuracy | Choose BZX85C8V2 for cost-driven designs where ±10% VZ tolerance and higher impedance are acceptable |
Compared with 1N5344BG, the 1N5344B offers identical regulation but lacks Pb-free compliance, while BZX85C8V2 trades tighter tolerance and lower impedance for lower cost and broader availability-making 1N5344BG optimal for RoHS-compliant, precision-regulated systems.
Availability
1N5344BG is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and precision reference voltage generation requiring stable component supply and full RoHS compliance.
Supply support for 1N5344BG 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, high-performance silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The 1N53 Series belongs to onsemi's Surmetic 40 Zener regulator family, engineered for high-reliability shunt regulation in harsh environments with emphasis on surge resilience, thermal stability, and tight parametric control.
FAQ
What is the nominal zener voltage and tolerance of the 1N5344BG?
The 1N5344BG has a nominal zener voltage of 8.2 V with a guaranteed tolerance of ±5%, corresponding to a minimum of 7.79 V and maximum of 8.61 V at 25°C and IZT = 1.5 mA. This tight tolerance ensures consistent regulation across production lots and supports precision feedback loop design in power supplies.
How much power can the 1N5344BG dissipate continuously?
The 1N5344BG is rated for 5 W steady-state power dissipation at TL = 25°C with 3/8″ lead length. Above 25°C, it must be derated at 40 mW/°C. Its junction-to-lead thermal resistance is 25 °C/W, enabling predictable thermal management when mounted with standard lead heatsinking practices.
Does the 1N5344BG meet RoHS requirements?
Yes, the 'G' suffix in 1N5344BG explicitly denotes a Pb-free package compliant with RoHS Directive 2011/65/EU. The device uses lead-free terminations and transfer-molded plastic encapsulation meeting all substance restrictions and soldering compatibility requirements outlined in onsemi's Soldering and Mounting Techniques Reference Manual.
What is the maximum surge current the 1N5344BG can handle?
The 1N5344BG supports up to 180 W non-repetitive surge power for 8.3 ms, translating to approximately 21.9 A peak current at its 8.2 V nominal zener voltage. This capability is validated per Figure 5 in the datasheet and enables reliable transient suppression in automotive and industrial power rails.
What is the zener impedance of the 1N5344BG and why does it matter?
The 1N5344BG has a maximum zener impedance of 150 Ω at IZT = 1.5 mA and 200 Ω at IZK = 1 mA. Low impedance ensures minimal output voltage variation under changing load current, directly improving regulation accuracy in feedback networks and reference circuits where stability is critical.
1N5344BG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 6.2 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
1N5344BG FAQ
1.How can I place an order for 1N5344BG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5344BG 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 1N5344BG reliable?
The price and inventory of 1N5344BG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5344BG is usually 5 days.
3.What payment methods are accepted for 1N5344BG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5344BG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5344BG?
1N5344BG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5344BG 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 1N5344BG?
For technical support, including 1N5344BG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5344BG requirements.
6.How does Aetrix verify that 1N5344BG is sourced from the original manufacturer or authorized distributors?
All 1N5344BG 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 1N5344BG meets industry standards.
7.What is the process for return or replacement of 1N5344BG?
All 1N5344BG units undergo pre-shipment inspection (PSI). If there is an issue with 1N5344BG, 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 1N5344BG part is unused and in its original packaging.
Return procedure for 1N5344BG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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