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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

onsemi 1N5367B

Name: 1N5367B
Brand: onsemi
SKU: 1N5367B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5367B

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: T-18, Axial

Datasheet:: 1N5367B.pdf

Description:: DIODE ZENER 43V 5W AXIAL

Quantity:: RFQ Add To RFQ list

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Inventory:6,314

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Product details

Overview

1N5367B from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 43 V, ±5% tolerance, 30 Ω maximum zener impedance at 20 mA test current, and 0.7 mA maximum leakage current at 32.7 V reverse voltage. It operates as a precision voltage reference or shunt regulator in DC power supply feedback paths, overvoltage protection circuits, and voltage-clamping applications.

For engineers reviewing the 1N5367B datasheet, pinout, applications, or equivalent options, key selection considerations include its 43 V regulation point, 190 mA maximum DC zener current, 180 W surge rating at 8.3 ms, ESD robustness (>16 kV HBM), and compatibility with standard through-hole PCB layouts using CASE 017AA package.

Technical Context

The 1N5367B employs a silicon-oxide passivated junction for stable voltage regulation and low parameter drift. Its thermal design relies on lead-to-ambient conduction, with junction-to-lead thermal resistance of 25 °C/W at 3/8″ lead length and derating of 40 mW/°C above 25 °C.

It delivers tight regulation across temperature via a positive temperature coefficient optimized for 43 V operation (≈+0.085 %/°C typical), and supports non-repetitive surge currents up to 110 A at 8.3 ms pulse width per Figure 5 in the datasheet.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	40.85–45.15 V @ I_ZT = 20 mA - defines precise clamping threshold for 43 V nominal systems
Power Dissipation	5 W @ T_L = 25°C - sets maximum continuous DC power handling before thermal derating
Zener Impedance	30 Ω max @ I_ZT = 20 mA - ensures low dynamic resistance for stable regulation under load transients
Leakage Current	0.7 mA max @ V_R = 32.7 V - guarantees minimal standby current in high-impedance bias networks
Surge Rating	180 W @ 8.3 ms - enables robust transient suppression without failure during line surges or inductive kick
ESD Rating	Class 3 (>16 kV) HBM - provides built-in electrostatic immunity for handling and assembly
Operating Temp	−65°C to +200°C (DC max 150°C) - supports industrial, automotive under-hood, and aerospace 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 / Zener cathode reference node	Connected to lower-potential side of regulated circuit; forms reference ground for shunt regulation
Cathode	Zener breakdown terminal / Regulation output node	Connected to higher-potential rail; maintains fixed 43 V drop relative to anode during reverse bias

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Guarantees 43 V regulation within ±2.15 V across production lot, reducing need for post-assembly trimming
Low zener impedance (30 Ω)	Minimizes output voltage variation under ±10 mA load changes, critical for precision reference stability
180 W surge capability	Withstands IEC 61000-4-5 Level 4 surge events without degradation when used with series current-limiting resistor
Pb-free construction	Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profiles for lead-free assembly
Void-free plastic encapsulation	Prevents moisture ingress and corrosion in humid or chemically aggressive environments (IPC-J-STD-020 MSL 1)

Applications

Switch-Mode Power Supply Feedback	Overvoltage Protection Clamp
Use Scenario: Used in optocoupler-coupled feedback loop of isolated 48 V DC-DC converter to regulate output voltage. IC Role / Device Role / Timing Role: Shunt regulator providing precise 43 V reference to TL431-like control IC input. Use Value: Enables ±1% output regulation accuracy over line/load/temperature due to tight V_Z tolerance and low ZZT.	Use Scenario: Placed across motor driver bus to clamp voltage spikes during inductive turn-off. IC Role / Device Role / Timing Role: Passive voltage clamp absorbing energy from flyback diode recovery and MOSFET switching transients. Use Value: Limits bus voltage to ≤45.15 V, protecting 50 V-rated gate drivers and capacitors without active intervention.
Programmable Voltage Reference	ESD-Sensitive Interface Protection
Use Scenario: Paired with precision resistor divider to generate stable 43 V reference for ADC calibration in test equipment. IC Role / Device Role / Timing Role: Primary voltage reference element defining full-scale input range for 16-bit analog front-end. Use Value: Delivers <10 ppm/°C effective TC when operated at constant I_Z, enabling <±0.02% drift over 0–70°C.	Use Scenario: Mounted at RS-485 transceiver inputs to suppress ESD events per IEC 61000-4-2 Level 4. IC Role / Device Role / Timing Role: First-line transient suppressor diverting >16 kV HBM discharges away from sensitive PHY pins. Use Value: Prevents latch-up and gate oxide damage in transceivers while maintaining signal integrity via low capacitance (<2 pF).

Switch-Mode Power Supply Feedback

Overvoltage Protection Clamp

Use Scenario: Used in optocoupler-coupled feedback loop of isolated 48 V DC-DC converter to regulate output voltage.

IC Role / Device Role / Timing Role: Shunt regulator providing precise 43 V reference to TL431-like control IC input.

Use Value: Enables ±1% output regulation accuracy over line/load/temperature due to tight V_Z tolerance and low ZZT.

Use Scenario: Placed across motor driver bus to clamp voltage spikes during inductive turn-off.

IC Role / Device Role / Timing Role: Passive voltage clamp absorbing energy from flyback diode recovery and MOSFET switching transients.

Use Value: Limits bus voltage to ≤45.15 V, protecting 50 V-rated gate drivers and capacitors without active intervention.

Programmable Voltage Reference

ESD-Sensitive Interface Protection

Use Scenario: Paired with precision resistor divider to generate stable 43 V reference for ADC calibration in test equipment.

IC Role / Device Role / Timing Role: Primary voltage reference element defining full-scale input range for 16-bit analog front-end.

Use Value: Delivers <10 ppm/°C effective TC when operated at constant I_Z, enabling <±0.02% drift over 0–70°C.

Use Scenario: Mounted at RS-485 transceiver inputs to suppress ESD events per IEC 61000-4-2 Level 4.

IC Role / Device Role / Timing Role: First-line transient suppressor diverting >16 kV HBM discharges away from sensitive PHY pins.

Use Value: Prevents latch-up and gate oxide damage in transceivers while maintaining signal integrity via low capacitance (<2 pF).

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5367BRLG	Tape-and-reel packaging (4000 pcs), identical electrical specs and CASE 017AA package	Optimized for automated SMT placement despite axial form factor; same thermal and electrical behavior	Select for high-volume production requiring pick-and-place compatibility and reduced handling labor
BZX85-C43	1.3 W rating, 5% tolerance, 50 Ω Z_ZT @ 5 mA - lower power, higher impedance, different test current	Suitable only for low-current biasing or signal-level clamping; not for 5 W continuous dissipation	Choose only where power demand is <1 W and cost sensitivity outweighs regulation precision and surge resilience

Compared with 1N5367B, the 1N5367BRLG offers identical performance in tape-and-reel format for automated assembly, while BZX85-C43 trades 5 W capability and 30 Ω impedance for lower cost and smaller footprint in low-power roles - neither is pin-compatible, but both serve overlapping voltage-reference functions with distinct thermal and dynamic constraints.

Availability

1N5367B is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifier modules, and automotive body control units requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for 1N5367B 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The 1N53 Series is designed as a high-reliability, 5 W Zener regulator family targeting ruggedized power conditioning, overvoltage protection, and precision reference needs in harsh-environment electronics.

FAQ

What is the exact zener voltage range specified for the 1N5367B?

The 1N5367B has a guaranteed zener voltage range of 40.85 V to 45.15 V at 20 mA test current (I_ZT), corresponding to a nominal 43 V with ±5% tolerance per JEDEC standards. This range is validated under controlled 40 ±10 ms pulse conditions at 25°C ambient, with mounting contacts located 3/8″ to 1/2″ from the diode body per datasheet Note 3.

Can the 1N5367B be used in surface-mount designs?

No - the 1N5367B uses an axial-lead, through-hole CASE 017AA package and is not designed for surface-mount assembly. While 1N5367BRLG is offered in tape-and-reel, it retains the same axial-leaded mechanical form and requires through-hole mounting. For SMT alternatives, consider DO-214AC (SMA) packaged Zeners like SMAJ43A, which differ electrically and thermally.

What is the maximum DC zener current rating for the 1N5367B?

The 1N5367B has a maximum DC zener current (I_ZM) of 190 mA, derived from its 5 W power rating divided by the maximum zener voltage (45.15 V). This value assumes T_L = 25°C and 3/8″ lead length; actual usable current must be reduced per the 40 mW/°C derating curve above 25°C ambient or lead temperature.

How does the 1N5367B handle transient surge events?

Per Figure 5 in the onsemi datasheet, the 1N5367B supports up to 110 A peak non-repetitive surge current at 8.3 ms pulse width. This corresponds to 180 W peak power, enabling reliable suppression of IEC 61000-4-5 surges when paired with appropriate series impedance to limit total energy dissipation within safe operating area limits.

Is the 1N5367B RoHS compliant and lead-free?

Yes - the "G" suffix in part numbers like 1N5367BG or 1N5367BRLG explicitly denotes Pb-free packaging per onsemi's RoHS compliance program. The device meets EU Directive 2011/65/EU and is qualified for lead-free soldering at 260°C for 10 seconds at 1/16″ from case, as documented in the mechanical characteristics section.

1N5367B Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: T-18, Axial

Packaging:: Bulk

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 43 V

Tolerance:: ±5%

Power - Max:: 5 W

Impedance (Max) (Zzt):: 20 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 32.7 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

1N5367B FAQ

1.How can I place an order for 1N5367B through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5367B 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 1N5367B reliable?

The price and inventory of 1N5367B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5367B is usually 5 days.

3.What payment methods are accepted for 1N5367B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5367B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5367B?

1N5367B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5367B 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 1N5367B?

For technical support, including 1N5367B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5367B requirements.

6.How does Aetrix verify that 1N5367B is sourced from the original manufacturer or authorized distributors?

All 1N5367B 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 1N5367B meets industry standards.

7.What is the process for return or replacement of 1N5367B?

All 1N5367B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5367B, 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 1N5367B part is unused and in its original packaging.

Return procedure for 1N5367B:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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