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onsemi 1N5346BG
- Part No.:
- 1N5346BG
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5346BG.pdf
- Description:
- DIODE ZENER 9.1V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,036
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Product details
Overview
1N5346BG from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 9.1 V, ±5% tolerance, maximum zener impedance of 150 Ω at 2 mA test current, and surge rating of 520 A at 8.3 ms. It operates across −65 °C to +200 °C and is used for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation.
For engineers reviewing the 1N5346BG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal behavior, mechanical package details, and real-world selection guidance for industrial power management and analog signal conditioning designs.
Technical Context
The 1N5346BG employs a silicon-oxide passivated junction for stable breakdown characteristics and low leakage. Its zener voltage is specified at IZT = 2 mA with guaranteed min/typ/max values of 8.65 V / 9.1 V / 9.56 V, and it exhibits a positive temperature coefficient above 5 V (≈0.22 mV/°C per Figure 2).
Thermal performance is defined by junction-to-lead resistance (θJL = 25 °C/W) and derating of 40 mW/°C above 25 °C. The device supports non-repetitive surge currents up to 520 A (8.3 ms), validated under JEDEC-standard square-wave pulse conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal (8.65–9.56 V range); sets precise regulation point in shunt regulator topologies |
| Power Dissipation (PD) | 5 W at TL = 25 °C; defines maximum continuous DC power handling before thermal shutdown |
| Zener Impedance (ZZT) | 150 Ω max @ IZT = 2 mA; determines regulation stiffness under small-signal load variations |
| Surge Current (IR) | 520 A peak @ 8.3 ms; enables transient overvoltage clamping without failure |
| Leakage Current (IR) | 0.22 μA max @ VR = 7.3 V; ensures minimal quiescent current in high-impedance bias networks |
| Operating Temp Range | −65 °C to +200 °C; supports deployment in automotive engine compartments and industrial motor drives |
| ESD Rating | Class 3 (>16 kV HBM); provides robustness against handling-induced electrostatic discharge |
Pinout & Package
Package: Axial-lead, transfer-molded plastic (Case 017AA), Pb-free, cathode indicated by band. Dimensions: Length K = 1.000–1.250 in (25.4–31.75 mm), body diameter B = 0.130–0.145 in (3.30–3.68 mm), lead diameter D = 0.037–0.043 in (0.94–1.09 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to lower-potential node in reverse-biased regulation mode; carries full zener current during regulation |
| Cathode | Zener breakdown terminal | Marked with band; connects to higher-potential node; defines regulated output voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| Silicon-oxide passivated junction | Enables tight parameter distribution and long-term stability in humid or chemically aggressive environments |
| ±5% zener voltage tolerance | Reduces need for post-assembly trimming in cost-sensitive power supply designs |
| 180 W surge rating (8.3 ms) | Clamps line transients without degradation-verified per JEDEC JESD22-A114 standard |
| Pb-free construction | Complies with RoHS Directive 2011/65/EU and IPC/JEDEC J-STD-609B Class 3 marking |
| Void-free plastic encapsulation | Prevents moisture ingress and delamination during reflow or wave soldering at 260 °C |
Applications
| Industrial Power Supply Regulation | Automotive ECU Reference Voltage |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback converters for PLC I/O modules. IC Role / Device Role / Timing Role: Shunt regulator providing 9.1 V reference to optocoupler input, enabling primary-side voltage sensing. Use Value: Maintains ±1.5% output regulation across 0–85 °C ambient with <10 mV line/load transient response due to 150 Ω ZZT. | Use Scenario: Generating stable bias for microcontroller ADC reference in engine control units. IC Role / Device Role / Timing Role: Precision voltage clamp connected to internal LDO input, ensuring clean 9.1 V rail despite battery ripple. Use Value: Delivers <0.22 μA leakage at 7.3 V, minimizing current draw from low-power sleep modes while surviving 125 °C junction temperature. |
| Overvoltage Protection Circuit | Test Equipment Calibration Reference |
Use Scenario: Clamping induced surges on 12 V CAN bus lines during ESD events. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between CAN_H and ground, triggered above 9.56 V. Use Value: Absorbs 520 A (8.3 ms) surge without parametric shift-validated per ISO 16750-2 Pulse 4a test profile. | Use Scenario: Providing traceable 9.1 V reference in portable multimeter calibration jigs. IC Role / Device Role / Timing Role: Low-drift zener source feeding precision op-amp buffer in metrology-grade voltage divider. Use Value: Achieves <±0.5% total error over 1000-hour life due to oxide-passivated junction stability and <0.22 mV/°C tempco. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5346BRLG | Tape-and-reel packaging (4000 units), identical electrical specs and package dimensions | Optimized for automated SMT placement; requires reel-handling infrastructure | Select when integrating into high-volume PCB assembly with pick-and-place equipment |
| MMBZ5240BLT1G | SOT-23 surface-mount package, 100 mW PD, 10 V nominal, ±5% tolerance | Lower power, smaller footprint; unsuitable for >100 mA continuous regulation | Choose only for space-constrained, low-current biasing-not as direct replacement for 5 W dissipation |
Compared with 1N5346BG, the 1N5346BRLG offers identical regulation performance with logistics optimization for production lines, while MMBZ5240BLT1G trades power capability for miniaturization-neither is pin-compatible, and both require layout revision and thermal reassessment.
Availability
1N5346BG is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronics, and test instrumentation requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5346BG 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, sensor, and connectivity solutions for automotive, industrial, and cloud power markets.
The 1N53 Series is designed for high-reliability voltage regulation in harsh-environment applications, emphasizing thermal robustness, surge resilience, and long-term parametric stability under sustained DC stress.
FAQ
What is the zener voltage tolerance for 1N5346BG?
The 1N5346BG has a zener voltage tolerance of ±5%, with guaranteed minimum, nominal, and maximum values of 8.65 V, 9.1 V, and 9.56 V respectively at IZT = 2 mA and TA = 25 °C. This tolerance is defined per JEDEC standards and applies to all devices bearing the "B" suffix in the 1N53 series.
Can 1N5346BG be used in surface-mount designs?
No, the 1N5346BG is an axial-lead through-hole device in Case 017AA plastic package and is not compatible with surface-mount assembly processes. For SMT alternatives, consider the MMBZ5240BLT1G (SOT-23, 100 mW), but note its significantly lower power rating and different thermal behavior compared to the 5 W 1N5346BG.
What is the maximum steady-state power dissipation for 1N5346BG?
The 1N5346BG has a maximum steady-state power dissipation of 5 W at lead temperature (TL) = 25 °C with 3/8 inch lead length. Above 25 °C, it must be derated linearly at 40 mW/°C, reaching zero dissipation at TL = 150 °C. This rating assumes proper heatsinking via leads per Figure 1 thermal resistance curves.
Does 1N5346BG meet RoHS requirements?
Yes, the "G" suffix in 1N5346BG explicitly denotes Pb-free packaging compliant with the EU RoHS Directive 2011/65/EU. The device uses lead-free terminations and halogen-free molding compound, and its marking conforms to IPC/JEDEC J-STD-609B Class 3 requirements.
What is the surge current rating for 1N5346BG?
The 1N5346BG is rated for a maximum non-repetitive peak surge current of 520 A at 8.3 ms pulse width, as specified in the Electrical Characteristics table on page 2 of the onsemi datasheet. This rating is validated under JEDEC-standard square-wave conditions and correlates to 180 W surge power per the Maximum Ratings table.
1N5346BG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 6.9 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
1N5346BG FAQ
1.How can I place an order for 1N5346BG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5346BG 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 1N5346BG reliable?
The price and inventory of 1N5346BG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5346BG is usually 5 days.
3.What payment methods are accepted for 1N5346BG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5346BG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5346BG?
1N5346BG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5346BG 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 1N5346BG?
For technical support, including 1N5346BG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5346BG requirements.
6.How does Aetrix verify that 1N5346BG is sourced from the original manufacturer or authorized distributors?
All 1N5346BG 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 1N5346BG meets industry standards.
7.What is the process for return or replacement of 1N5346BG?
All 1N5346BG units undergo pre-shipment inspection (PSI). If there is an issue with 1N5346BG, 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 1N5346BG part is unused and in its original packaging.
Return procedure for 1N5346BG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5346BG Tags
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