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

onsemi 1N5361B

Name: 1N5361B
Brand: onsemi
SKU: 1N5361B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5361B

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: T-18, Axial

Datasheet:: 1N5361B.pdf

Description:: DIODE ZENER 27V 5W AXIAL

Quantity:: RFQ Add To RFQ list

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Inventory:9,145

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Product details

Overview

1N5361B from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 27 V, ±5% tolerance, 50 Ω maximum zener impedance at 5 mA test current, and 120 A maximum surge current (8.3 ms). 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 1N5361B datasheet, pinout, applications, or equivalent options, key selection criteria include its 27 V regulation point, 50 Ω dynamic impedance, 0.6 mA leakage at 20.6 V, 4.1 V forward voltage limit at 1 A, and axial plastic package compatibility with through-hole PCB assembly and manual soldering.

Technical Context

The 1N5361B uses a silicon-oxide passivated junction for stable breakdown characteristics and low leakage. Its zener voltage is specified at IZT = 5 mA with tight ±5% tolerance and temperature coefficient optimized for the 25–30 V range.

It delivers 5 W steady-state power dissipation at TL = 25°C with 40 mW/°C derating above that temperature, and exhibits 25 °C/W junction-to-lead thermal resistance. The device supports non-repetitive 120 A surge current at 8.3 ms pulse width per JEDEC standards.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	25.65–28.35 V @ I_ZT = 5 mA - defines precise regulation window for feedback or clamping
Zener Impedance (Z_ZT)	50 Ω max @ I_ZT = 5 mA - ensures minimal output voltage variation under load changes
Max Surge Current	120 A @ 8.3 ms - provides robust transient overvoltage suppression without failure
Leakage Current	0.6 mA max @ V_R = 20.6 V - guarantees low standby power loss in high-impedance bias networks
Forward Voltage	1.2 V max @ I_F = 1.0 A - enables reliable anode-cathode conduction during reverse-biased fault conditions
Power Dissipation	5 W @ T_L = 25°C - sets thermal design boundary for lead-mounted heatsinking
ESD Rating	Class 3 (>16 kV) HBM - withstands 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, leads 25.4–31.75 mm long.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal in forward bias; reference node in shunt regulation	Connected to lower-potential side of circuit; must handle full surge current during clamping
Cathode	Current exit terminal in forward bias; regulated output node in shunt configuration	Banded end; tied to regulated voltage rail; requires stable thermal path via lead length control

Key Features

Feature	Design Value
Silicon-oxide passivated junction	Enables stable, low-drift zener voltage with <0.6 mA leakage at 20.6 V
±5% zener voltage tolerance	Reduces need for post-production trimming in precision voltage references
120 A surge rating (8.3 ms)	Protects downstream circuitry against lightning-induced transients and inductive kickback
Pb-free axial plastic package	Complies with RoHS while maintaining 260°C solderability and corrosion-resistant finish
Void-free thermosetting encapsulation	Prevents moisture ingress and mechanical stress cracking in humid or thermal-cycling environments

Applications

DC Power Supply Regulation	Overvoltage Protection
Use Scenario: Stabilizing output voltage in linear regulator feedback loops or low-power unregulated supplies. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 27 V setpoint to error amplifier input. Use Value: Maintains ±1% output accuracy across 10–100 mA load range due to 50 Ω Z_ZT and low tempco.	Use Scenario: Clamping transient spikes on 24 V industrial control bus lines. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting >100 A surges away from PLC I/O drivers. Use Value: Survives 120 A/8.3 ms pulses without parametric shift, verified per JEDEC Std 22-A114.
Voltage Reference for ADCs	Signal Level Translation
Use Scenario: Providing stable 27 V reference for 12-bit analog-to-digital converters in sensor front-ends. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source feeding ADC reference input pin. Use Value: Achieves <0.05% line regulation error over 5–100 mA supply current due to tight ±5% V_Z tolerance.	Use Scenario: Biasing optocoupler LEDs in isolated 24 V to 3.3 V logic interfaces. IC Role / Device Role / Timing Role: Zener clamp limiting LED anode voltage to prevent overdrive during supply transients. Use Value: Limits forward voltage excursion to ≤28.35 V, protecting 30 V-rated optocouplers under 120 A surge events.

DC Power Supply Regulation

Overvoltage Protection

Use Scenario: Stabilizing output voltage in linear regulator feedback loops or low-power unregulated supplies.

IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 27 V setpoint to error amplifier input.

Use Value: Maintains ±1% output accuracy across 10–100 mA load range due to 50 Ω Z_ZT and low tempco.

Use Scenario: Clamping transient spikes on 24 V industrial control bus lines.

IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting >100 A surges away from PLC I/O drivers.

Use Value: Survives 120 A/8.3 ms pulses without parametric shift, verified per JEDEC Std 22-A114.

Voltage Reference for ADCs

Signal Level Translation

Use Scenario: Providing stable 27 V reference for 12-bit analog-to-digital converters in sensor front-ends.

IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source feeding ADC reference input pin.

Use Value: Achieves <0.05% line regulation error over 5–100 mA supply current due to tight ±5% V_Z tolerance.

Use Scenario: Biasing optocoupler LEDs in isolated 24 V to 3.3 V logic interfaces.

IC Role / Device Role / Timing Role: Zener clamp limiting LED anode voltage to prevent overdrive during supply transients.

Use Value: Limits forward voltage excursion to ≤28.35 V, protecting 30 V-rated optocouplers under 120 A surge events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5361	Same 27 V nominal zener voltage but ±10% tolerance (vs. ±5% for 1N5361B)	Less suitable for precision feedback where tighter regulation is required	Select 1N5361B when ±5% V_Z tolerance is mandatory for closed-loop stability
MMBZ5262B	Surface-mount SOT-23 package; same 27 V nominal, ±5% tolerance; 0.5 W power rating	Not interchangeable in through-hole designs; limited to low-power signal-level clamping	Choose MMBZ5262B only for space-constrained PCBs where 5 W dissipation is unnecessary

Compared with 1N5361 and MMBZ5262B, the 1N5361B uniquely combines ±5% tolerance, 5 W power handling, and axial-leaded mechanical robustness-making it optimal for industrial power supply regulation where reliability under surge and thermal stress is critical.

Availability

1N5361B is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection, and precision voltage reference applications requiring stable component supply and long-term lifecycle support.

Supply support for 1N5361B 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 supplier of high-performance silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The 1N53 Series is designed as a family of 5 W Surmetic™ 40 Zener regulators targeting cost-sensitive, high-reliability power management in industrial controls, power supplies, and protection circuits.

FAQ

What is the nominal zener voltage and tolerance of the 1N5361B?

The 1N5361B has a nominal zener voltage of 27 V with a guaranteed tolerance of ±5%, meaning its actual breakdown voltage falls between 25.65 V and 28.35 V when tested at 5 mA (IZT). This tight tolerance is specified per JEDEC standards and reflects the device's use of oxide-passivated junction technology for improved consistency across production lots.

What is the maximum surge current rating for the 1N5361B and under what conditions?

The 1N5361B is rated for a maximum non-repetitive surge current of 120 A at a pulse width of 8.3 ms, per JEDEC Std 22-A114. This rating assumes single-event, square-wave conditions at TA = 25°C with proper lead mounting (3/8″ from case). The device maintains parametric integrity after such events, making it suitable for industrial transient suppression.

How does the 1N5361B's zener impedance affect its performance in voltage regulation circuits?

The 1N5361B has a maximum zener impedance (ZZT) of 50 Ω at IZT = 5 mA. This low dynamic impedance ensures minimal output voltage deviation (<0.25 V) for ±10 mA load current changes, directly improving regulation accuracy in feedback networks and reference circuits where stability under varying load is essential.

Is the 1N5361B RoHS-compliant and what is its packaging format?

Yes, the 1N5361B is Pb-free and RoHS-compliant, indicated by the "G" suffix in ordering codes (e.g., 1N5361BG). It is supplied in axial-lead, transfer-molded plastic (Case 017AA), available in 1000-unit boxes or 4000-unit tape-and-reel formats. Leads are corrosion-resistant and solderable at 260°C for 10 seconds at 1/16″ from case.

What is the forward voltage specification for the 1N5361B and why does it matter?

The 1N5361B has a maximum forward voltage (VF) of 1.2 V at IF = 1.0 A. This specification matters because it defines the conduction drop during forward-bias fault conditions-such as reverse-polarity protection or crowbar circuits-ensuring predictable power dissipation and safe operation when used bidirectionally in protection topologies.

1N5361B Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: T-18, Axial

Packaging:: Bulk

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 27 V

Tolerance:: ±5%

Power - Max:: 5 W

Impedance (Max) (Zzt):: 5 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 20.6 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

1N5361B FAQ

1.How can I place an order for 1N5361B through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5361B 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 1N5361B reliable?

The price and inventory of 1N5361B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5361B is usually 5 days.

3.What payment methods are accepted for 1N5361B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5361B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5361B?

1N5361B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5361B 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 1N5361B?

For technical support, including 1N5361B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5361B requirements.

6.How does Aetrix verify that 1N5361B is sourced from the original manufacturer or authorized distributors?

All 1N5361B 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 1N5361B meets industry standards.

7.What is the process for return or replacement of 1N5361B?

All 1N5361B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5361B, 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 1N5361B part is unused and in its original packaging.

Return procedure for 1N5361B:

1.Submit a request within 90 days.

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

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