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onsemi 1N5346BRL
- Part No.:
- 1N5346BRL
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5346BRL.pdf
- Description:
- DIODE ZENER 9.1V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:8,540
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Product details
Overview
1N5346BRL from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 9.1 V (±5%), maximum zener impedance of 150 Ω at 2 mA test current, and surge rating of 520 A at 8.3 ms. It operates as a precision voltage reference or shunt regulator in DC power supply feedback loops, overvoltage protection circuits, and voltage-clamping applications.
For engineers reviewing the 1N5346BRL datasheet, pinout, applications, or equivalent options, key selection criteria include its 9.1 V regulation tolerance, 150 Ω dynamic impedance at IZT = 2 mA, 7.5 mA minimum knee current, and Pb-free Surmetic™ 40 plastic package with cathode band polarity marking.
Technical Context
This device uses silicon-oxide passivated junction technology to achieve tight voltage tolerance (±5%), low leakage (<0.22 mA at 7.36 V), and stable regulation across temperature. Its thermal resistance from junction-to-lead is 25 °C/W at 3/8″ lead length, enabling reliable 5 W steady-state dissipation when properly heatsunk.
The 1N5346BRL exhibits a positive temperature coefficient (~+5.5 mV/°C for 9.1 V units per Figure 2), requiring thermal design consideration in precision references. Its 180 W non-repetitive surge capability at 8.3 ms supports transient overvoltage suppression without degradation under defined pulse conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal (min 8.65 V, max 9.56 V) - defines regulated output voltage under 2 mA test current |
| Power Dissipation (PD) | 5 W at TL = 25°C - maximum continuous DC power handling with 3/8″ lead heatsinking |
| Zener Impedance (ZZT) | 150 Ω max at IZT = 2 mA - determines regulation stiffness and output voltage variation under load changes |
| Knee Current (IZK) | 2 mA min - minimum current required to enter stable zener breakdown region |
| Leakage Current (IR) | 0.22 mA max at VR = 7.36 V - ensures low standby power loss in high-impedance bias networks |
| Surge Current (IRM) | 520 A peak at 8.3 ms - enables robust transient suppression without failure in surge-prone environments |
| ESD Rating | Class 3 (>16 kV HBM) - withstands electrostatic discharge during handling and assembly |
Pinout & Package
Package: Axial-lead Surmetic™ 40 plastic case (JEDEC CASE 017AA), void-free transfer-molded thermosetting material, cathode indicated by color band, RoHS-compliant Pb-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated circuit; forms reference ground return path in shunt regulator topologies |
| Cathode | Zener breakdown terminal / Regulation output node | Connected to regulated voltage rail; supplies stable reference voltage when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Guarantees tight regulation window (8.65–9.56 V) without post-manufacturing trimming |
| 150 Ω max Zener impedance at 2 mA | Minimizes output voltage deviation under varying load currents in feedback-sensing applications |
| 520 A surge rating at 8.3 ms | Provides single-event transient immunity exceeding IEC 61000-4-5 Level 4 requirements |
| Class 3 ESD protection (>16 kV HBM) | Eliminates need for external ESD protection in board-level handling and automated assembly |
| 25 °C/W junction-to-lead thermal resistance | Enables full 5 W power dissipation with simple lead-length thermal management (3/8″ minimum) |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing output voltage in linear regulator feedback networks or low-power unregulated AC/DC adapters. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 9.1 V setpoint for error amplifier comparison. Use Value: Maintains ±1% output stability over line/load variations due to 150 Ω dynamic impedance and low temperature coefficient. |
Use Scenario: Clamping transient spikes on 12 V automotive or industrial control bus lines. IC Role / Device Role / Timing Role: Passive crowbar element diverting excess energy to ground when bus exceeds 9.56 V. Use Value: Survives 520 A surges at 8.3 ms without parametric shift, ensuring long-term reliability in harsh EMI environments. |
| Reference Voltage Source | Signal Level Translation |
Use Scenario: Generating stable bias voltages for op-amp comparators or ADC reference inputs in sensor signal chains. IC Role / Device Role / Timing Role: Precision DC reference node with minimal drift (5.5 mV/°C TC) across −65°C to +150°C operating range. Use Value: Enables <1 LSB error in 10-bit systems over industrial temperature range without active compensation. |
Use Scenario: Level-shifting logic signals between 3.3 V microcontrollers and 9 V analog subsystems. IC Role / Device Role / Timing Role: Clamp diode limiting input voltage to 9.56 V while blocking reverse current below 7.36 V. Use Value: Prevents damage to downstream 9 V-rated ICs using only 0.22 mA leakage at 7.36 V, minimizing quiescent loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5346B | Same electrical specs and package, but supplied in 1000-unit boxes instead of tape-and-reel | No functional difference; suited for manual prototyping or low-volume hand-soldered assemblies | Select 1N5346BRL for automated SMT placement; choose 1N5346B for bench testing or small-batch builds |
| BZX85C9V1 | 1 W rating, 9.1 V ±5%, TO-204AA (DO-41) package, 100 Ω ZZT @ 5 mA | Lower power handling and different thermal profile; requires derating above 70°C ambient | Use BZX85C9V1 where space constraints prohibit axial leads or where 1 W dissipation suffices |
Compared with 1N5346BRL, the 1N5346B offers identical performance in bulk packaging, while BZX85C9V1 trades 5 W capability for smaller footprint and higher impedance-making it suitable only for low-power signal referencing, not power regulation.
Availability
1N5346BRL 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 traceability.
Supply support for 1N5346BRL 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, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The 1N53 Series belongs to onsemi's legacy Zener diode portfolio designed for high-reliability voltage regulation in demanding industrial and automotive environments, emphasizing ruggedness, tight tolerances, and surge resilience.
FAQ
What is the nominal zener voltage and tolerance of the 1N5346BRL?
The 1N5346BRL has a nominal zener voltage of 9.1 V with a guaranteed tolerance of ±5%, corresponding to a minimum of 8.65 V and maximum of 9.56 V at IZT = 2 mA. This tolerance is specified per JEDEC standards and applies to all B-suffix devices in the 1N53 series. The 1N5346BRL maintains this specification across its full operating temperature range of −65°C to +150°C.
How much power can the 1N5346BRL dissipate continuously?
The 1N5346BRL is rated for 5 W steady-state power dissipation at a lead temperature (TL) of 25°C with 3/8″ lead length. Derating is required above 25°C at 40 mW/°C, reducing usable power to approximately 3.5 W at 65°C lead temperature. The 1N5346BRL achieves this via its 25 °C/W junction-to-lead thermal resistance and Surmetic™ 40 plastic package construction.
What is the maximum surge current rating for the 1N5346BRL?
The 1N5346BRL supports a peak non-repetitive surge current of 520 A at an 8.3 ms pulse width, as verified per onsemi's test methodology. This rating reflects its ability to absorb transient energy without parametric shift or failure. The 1N5346BRL sustains this performance due to its silicon-oxide passivated junction and optimized thermal mass in the axial-lead package.
Does the 1N5346BRL have ESD protection, and what level is specified?
Yes, the 1N5346BRL is rated for Class 3 human body model (HBM) ESD protection, exceeding 16 kV. This specification is confirmed in the onsemi datasheet and results from the device's oxide-passivated junction structure. The 1N5346BRL's ESD robustness eliminates the need for additional on-board protection in most handling and assembly scenarios.
What package type and marking does the 1N5346BRL use?
The 1N5346BRL uses the axial-lead Surmetic™ 40 plastic package (JEDEC CASE 017AA), with cathode identified by a colored band. Its marking reads "1N5346B" followed by date code (YYWW) and Pb-free indicator. The "RL" suffix denotes tape-and-reel packaging (4000 units per reel), distinguishing it from the box-packaged 1N5346B variant.
1N5346BRL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
1N5346BRL FAQ
1.How can I place an order for 1N5346BRL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5346BRL 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 1N5346BRL reliable?
The price and inventory of 1N5346BRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5346BRL is usually 5 days.
3.What payment methods are accepted for 1N5346BRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5346BRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5346BRL?
1N5346BRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5346BRL 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 1N5346BRL?
For technical support, including 1N5346BRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5346BRL requirements.
6.How does Aetrix verify that 1N5346BRL is sourced from the original manufacturer or authorized distributors?
All 1N5346BRL 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 1N5346BRL meets industry standards.
7.What is the process for return or replacement of 1N5346BRL?
All 1N5346BRL units undergo pre-shipment inspection (PSI). If there is an issue with 1N5346BRL, 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 1N5346BRL part is unused and in its original packaging.
Return procedure for 1N5346BRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5346BRL Tags
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