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onsemi 1N5350B
- Part No.:
- 1N5350B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5350B.pdf
- Description:
- DIODE ZENER 13V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,474
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Product details
Overview
1N5350B from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 13 V (±5%), maximum zener impedance of 100 Ω at 2.5 mA test current, and surge rating of 365 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 1N5350B datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal behavior, mechanical package details, and real-world design context for stable DC voltage clamping and regulation in industrial and automotive power systems.
Technical Context
The 1N5350B employs a silicon-oxide passivated junction for stable breakdown characteristics and low leakage. Its ±5% zener tolerance and tight VZ regulation (12.35–13.65 V) enable accurate voltage referencing without external trimming.
Thermal performance is defined by junction-to-lead resistance (θJL = 25 °C/W), enabling reliable operation up to 150 °C under DC conditions. The device sustains non-repetitive 8.3 ms surges up to 365 A while maintaining regulation integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.35–13.65 V @ IZT = 2.5 mA - defines regulated output range for feedback and clamp circuits |
| Power Dissipation (PD) | 5 W @ TL = 25 °C - sets maximum continuous DC power handling before thermal derating |
| Zener Impedance (ZZT) | 100 Ω max @ IZT = 2.5 mA - determines regulation stiffness and output voltage variation under load changes |
| Leakage Current (IR) | 0.25 mA max @ VR = 7.0 V - ensures minimal quiescent current in standby or high-impedance bias networks |
| Surge Current (IRM) | 365 A peak @ 8.3 ms - supports transient overvoltage suppression in unregulated input stages |
| Operating Temperature | −65 °C to +200 °C - enables use in under-hood automotive, industrial motor drives, and aerospace environments |
| ESD Rating | Class 3 (>16 kV HBM) - provides robustness against handling and board-level electrostatic discharge events |
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; lead diameter uncontrolled, 1.000–1.250 inch lead length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node; reverse-biased during regulation; requires current-limiting resistor in series |
| Cathode | Zener breakdown terminal / regulated output node | Connected to higher-potential node; supplies stable voltage to load or feedback network when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables direct use in closed-loop feedback without calibration or trimming components |
| 100 Ω max zener impedance at 2.5 mA | Minimizes output voltage deviation under dynamic load steps in reference and clamp applications |
| 365 A surge rating (8.3 ms) | Protects downstream circuitry from line transients without requiring additional TVS devices |
| Class 3 ESD immunity (>16 kV HBM) | Reduces risk of field failure during handling, assembly, and end-user operation |
| Pb-free (RoHS-compliant) packaging | Meets global environmental compliance requirements without sacrificing thermal or electrical performance |
Applications
| Switch-Mode Power Supply Feedback | Automotive Load Dump Protection |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback paths using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Zener reference element providing precise 13 V threshold for TL431-type shunt regulators or discrete error comparators. Use Value: Maintains ±1% output regulation accuracy across temperature and line/load variations due to tight VZ tolerance and low ZZT. |
Use Scenario: Clamps transient voltages exceeding 13.65 V during ISO 7637-2 Load Dump pulses in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed across main rail or ECUs to absorb energy from alternator-induced spikes. Use Value: Withstands 365 A surges at 8.3 ms without degradation, eliminating need for parallel TVS arrays in cost-sensitive modules. |
| Industrial Sensor Reference Voltage | Programmable Logic Controller Input Protection |
Use Scenario: Supplies stable 13 V reference to analog front-end circuits in pressure, temperature, or current sensors operating in harsh factory environments. IC Role / Device Role / Timing Role: Precision voltage source for ADC reference buffers or op-amp bias networks requiring low drift and low noise. Use Value: Low 0.25 mA leakage at 7 V ensures minimal loading on high-impedance sensor bridges or Wheatstone configurations. |
Use Scenario: Protects digital input pins of PLC I/O modules from accidental 24 V miswiring or induced surges on field wiring. IC Role / Device Role / Timing Role: Clamp diode placed between input signal line and 13 V rail to limit voltage excursion to safe logic levels. Use Value: Fast response and repeatable 13 V breakdown allow predictable clamping without latch-up or damage to microcontroller GPIOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5350 | Same VZ range (12.35–13.65 V) but ±10% tolerance; no Pb-free marking; slightly higher ZZT (125 Ω) | Acceptable where tighter regulation not required; unsuitable for RoHS-compliant production | Select 1N5350B when regulatory compliance, thermal stability, and precision regulation are mandatory |
| BZX85C13 | 13 V nominal, ±5%, but rated at only 1.3 W; ZZT = 20 Ω typical; TO-204AA (DO-41) package | Lower power handling limits use to low-current references or signal-level clamping | Choose 1N5350B for 5 W dissipation needs, high-surge environments, or legacy axial-lead board layouts |
Compared with 1N5350 and BZX85C13, the 1N5350B delivers superior power handling (5 W vs. ≤1.3 W), guaranteed ±5% tolerance, and industry-leading surge robustness-making it the preferred choice for industrial power regulation where reliability and thermal margin are critical.
Availability
1N5350B is available at Aetrix Electronics and suitable for switch-mode power supplies, automotive electronics, industrial sensor interfaces, and programmable logic controller input protection requiring stable component supply and long-term lifecycle support.
Supply support for 1N5350B 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 was designed as a high-reliability, 5 W Zener regulator family for demanding DC voltage reference and overvoltage protection applications where thermal stability, surge resilience, and long-term parametric consistency are essential.
FAQ
What is the nominal zener voltage and tolerance of the 1N5350B?
The 1N5350B has a nominal zener voltage of 13 V with a guaranteed tolerance of ±5%, corresponding to a minimum of 12.35 V and maximum of 13.65 V at IZT = 2.5 mA. This tight tolerance eliminates the need for post-production calibration in most voltage reference designs and is explicitly confirmed in the onsemi datasheet Rev. 19, Table on page 3.
What is the maximum steady-state power dissipation for the 1N5350B?
The 1N5350B is rated for 5 W maximum steady-state power dissipation at lead temperature (TL) = 25 °C, with a derating factor of 40 mW/°C above that temperature. This value is specified in the "Maximum Ratings" table on page 1 of the official onsemi datasheet and reflects its capability as a high-power Zener regulator in thermally constrained layouts.
Does the 1N5350B have a Pb-free package option?
Yes-the "G" suffix in ordering codes (e.g., 1N5350BG) denotes a Pb-free, RoHS-compliant version of the 1N5350B. The datasheet confirms Pb-free packages are available and specifies soldering conditions including a maximum lead temperature of 260 °C for 10 seconds at 1/16 inch from the case, per onsemi's Soldering and Mounting Techniques Reference Manual.
What is the zener impedance of the 1N5350B and why does it matter?
The 1N5350B has a maximum zener impedance (ZZT) of 100 Ω at IZT = 2.5 mA. This parameter directly affects regulation accuracy: lower impedance means less output voltage variation under changing load currents. In practice, this enables stable reference generation in feedback networks where even small deviations impact system precision.
Can the 1N5350B be used for surge protection in automotive applications?
Yes-the 1N5350B is rated for a peak non-repetitive surge current of 365 A at 8.3 ms, making it suitable for load dump protection in 12 V automotive systems per ISO 7637-2. Its −65 °C to +200 °C operating range and Class 3 ESD rating further support rugged deployment in engine control units and body electronics where thermal and electrical stress are extreme.
1N5350B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 13 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 9.9 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
1N5350B FAQ
1.How can I place an order for 1N5350B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5350B 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 1N5350B reliable?
The price and inventory of 1N5350B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5350B is usually 5 days.
3.What payment methods are accepted for 1N5350B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5350B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5350B?
1N5350B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5350B 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 1N5350B?
For technical support, including 1N5350B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5350B requirements.
6.How does Aetrix verify that 1N5350B is sourced from the original manufacturer or authorized distributors?
All 1N5350B 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 1N5350B meets industry standards.
7.What is the process for return or replacement of 1N5350B?
All 1N5350B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5350B, 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 1N5350B part is unused and in its original packaging.
Return procedure for 1N5350B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5350B Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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