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

onsemi 3EZ36D5RLG

Name: 3EZ36D5RLG
Brand: onsemi
SKU: 3EZ36D5RLG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 3EZ36D5RLG

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: 3EZ36D5RLG.pdf

Description:: DIODE ZENER 36V 3W AXIAL

Quantity:: RFQ Add To RFQ list

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Inventory:8,755

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Product details

Overview

3EZ36D5RLG from onsemi is a 3 W, ±5% tolerance Zener diode in DO−41 (Case 59) axial package, with nominal Zener voltage of 36 V at 22 mA test current, maximum Zener impedance of 21 Ω at I_ZT, and surge rating of 98 W for 1 ms. It serves as a precision voltage reference or overvoltage clamp in DC power supply regulation circuits.

For engineers reviewing the 3EZ36D5RLG datasheet, pinout, applications, or equivalent options, key selection criteria include its 36 V nominal Zener voltage, 21 Ω dynamic impedance at 22 mA, 0.25 mA leakage at 27.4 V, ESD Class 3 (>16 kV HBM), and DO−41 thermal derating behavior up to 200°C junction temperature.

Technical Context

This device uses silicon-oxide passivated junction technology to deliver stable Zener regulation under steady-state and transient conditions. Its 3 W power rating at T_L = 75°C with 3/8″ lead length enables robust operation in compact power supplies without heatsinking.

The 3EZ36D5RLG exhibits low dynamic impedance (21 Ω @ 22 mA) and tight voltage tolerance (±5%), supporting accurate voltage clamping in feedback loops and protection circuits. Its 98 W non-repetitive surge capability per JEDEC standards allows handling of short-duration transients without degradation.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	34.2–37.8 V @ I_ZT = 22 mA - defines precise clamping threshold for 36 V nominal rail regulation
Zener Impedance (Z_ZT)	21 Ω max @ I_ZT = 22 mA - ensures minimal voltage deviation under load current changes
Reverse Leakage (I_R)	0.25 mA max @ V_R = 27.4 V - guarantees low standby power loss in high-impedance bias networks
Surge Power	98 W @ 1 ms - supports transient overvoltage suppression without failure in unregulated input stages
ESD Rating	Class 3 (>16 kV HBM) - provides robust handling during board assembly and field service
Junction Temp Range	−65°C to +200°C - enables deployment in automotive engine compartments and industrial motor drives

Pinout & Package

3EZ36D5RLG is housed in a DO−41 (Case 59) axial-leaded plastic package with cathode indicated by a polarity band. Leads are corrosion-resistant, solderable, and rated for 230°C for 10 seconds at 1/16″ from case.

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
Cathode	Zener breakdown terminal / voltage regulation output node	Connected to higher-potential rail; delivers stable 36 V reference when reverse-biased above V_Z

Key Features

Feature	Design Value
Silicon-oxide passivated junction	Enables stable long-term Zener voltage drift <0.1%/1000 hrs and low noise in precision references
3 W steady-state dissipation @ T_L = 75°C	Permits direct use in 12–48 V DC-DC converter feedback networks without external heat sinking
±5% Zener voltage tolerance	Reduces need for post-assembly trimming in cost-sensitive consumer and industrial power modules
DO−41 package footprint	Provides mechanical compatibility with legacy 1 W Zener footprints while delivering 3× power capability

Applications

Voltage Reference for SMPS Feedback	Overvoltage Clamp in Automotive ECUs
Use Scenario: Used in optocoupler-coupled feedback loop of 36 V output flyback converter to regulate output within ±2%. IC Role / Device Role / Timing Role: Zener diode providing stable 36 V reference to TL431 shunt regulator input. Use Value: 21 Ω Z_ZT minimizes regulation error caused by optocoupler CTR variation across temperature.	Use Scenario: Placed across 36 V battery rail in engine control unit to suppress load-dump transients up to 60 V. IC Role / Device Role / Timing Role: Standby clamping element absorbing 98 W surges for 1 ms without parametric shift. Use Value: Class 3 ESD rating ensures survival during PCB handling prior to conformal coating.
Industrial Sensor Excitation Supply	Programmable Logic Controller Input Protection
Use Scenario: Supplies regulated 36 V excitation to 4–20 mA current-loop pressure transducers in factory automation. IC Role / Device Role / Timing Role: Precision voltage source maintaining constant sensor bridge bias despite 10–40 V input variation. Use Value: 0.25 mA leakage at 27.4 V prevents loading errors in high-impedance sensor bias networks.	Use Scenario: Connected between 36 V digital input line and ground to protect FPGA I/O against induced surges in motor drive cabinets. IC Role / Device Role / Timing Role: Fast-acting shunt limiter diverting >300 V transients before IC damage threshold is reached. Use Value: −65°C to +200°C operating range ensures reliability in unventilated PLC enclosures near heat sources.

Voltage Reference for SMPS Feedback

Overvoltage Clamp in Automotive ECUs

Use Scenario: Used in optocoupler-coupled feedback loop of 36 V output flyback converter to regulate output within ±2%.

IC Role / Device Role / Timing Role: Zener diode providing stable 36 V reference to TL431 shunt regulator input.

Use Value: 21 Ω Z_ZT minimizes regulation error caused by optocoupler CTR variation across temperature.

Use Scenario: Placed across 36 V battery rail in engine control unit to suppress load-dump transients up to 60 V.

IC Role / Device Role / Timing Role: Standby clamping element absorbing 98 W surges for 1 ms without parametric shift.

Use Value: Class 3 ESD rating ensures survival during PCB handling prior to conformal coating.

Industrial Sensor Excitation Supply

Programmable Logic Controller Input Protection

Use Scenario: Supplies regulated 36 V excitation to 4–20 mA current-loop pressure transducers in factory automation.

IC Role / Device Role / Timing Role: Precision voltage source maintaining constant sensor bridge bias despite 10–40 V input variation.

Use Value: 0.25 mA leakage at 27.4 V prevents loading errors in high-impedance sensor bias networks.

Use Scenario: Connected between 36 V digital input line and ground to protect FPGA I/O against induced surges in motor drive cabinets.

IC Role / Device Role / Timing Role: Fast-acting shunt limiter diverting >300 V transients before IC damage threshold is reached.

Use Value: −65°C to +200°C operating range ensures reliability in unventilated PLC enclosures near heat sources.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5365B	36 V nominal, ±5%, 5 W rating, DO−41, Z_ZT = 15 Ω @ 22 mA	Higher power margin allows extended surge duty cycles; larger thermal mass slows response to fast transients	Select when sustained 36 V regulation under >2.5 W continuous load is required
BZX85C36	36 V nominal, ±5%, 1.3 W rating, DO−41, Z_ZT = 40 Ω @ 25 mA	Lower power rating limits use to signal-level clamping; higher Z_ZT reduces regulation accuracy	Select only for low-current bias references where 36 V tolerance is acceptable but 3 W capability is unnecessary

Compared with 1N5365B and BZX85C36, the 3EZ36D5RLG delivers optimal balance of 3 W power handling, 21 Ω impedance, and DO−41 compatibility-making it ideal for mid-power industrial power supplies where space-constrained 1 W devices fail and oversized 5 W parts add unnecessary cost and thermal inertia.

Availability

3EZ36D5RLG is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, sensor interface modules, and programmable logic controller input protection requiring stable component supply and full traceability.

Supply support for 3EZ36D5RLG 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 manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The 3EZxxxD5 series was designed specifically for high-reliability, medium-power Zener regulation in harsh-environment applications-emphasizing thermal stability, surge resilience, and long-term parameter consistency in axial-leaded form factors.

FAQ

What is the maximum steady-state power dissipation for 3EZ36D5RLG at 75°C lead temperature?

The 3EZ36D5RLG has a maximum steady-state power dissipation of 3 W at a lead temperature (T_L) of 75°C with 3/8″ lead length. Above 75°C, it derates linearly at 24 mW/°C. This rating is validated per JEDEC test conditions and reflects real-world performance in PCB-mounted configurations with standard clip or tie-point mounting.

Does 3EZ36D5RLG have Pb-free packaging compliance?

Yes, the 3EZ36D5RLG is available in Pb-free packaging, and all electrical specifications apply identically to both standard and Pb-free versions. The part marking and mechanical dimensions remain unchanged, ensuring drop-in compatibility in RoHS-compliant manufacturing lines without requalification.

What is the reverse leakage current specification for 3EZ36D5RLG at its rated breakdown voltage?

The 3EZ36D5RLG specifies a maximum reverse leakage current (I_R) of 0.25 mA at V_R = 27.4 V (76% of nominal V_Z). This value is guaranteed across the full operating temperature range and directly impacts bias network accuracy in high-impedance reference circuits.

How does the Zener impedance of 3EZ36D5RLG affect regulation accuracy in a feedback loop?

With a maximum Zener impedance (Z_ZT) of 21 Ω at I_ZT = 22 mA, the 3EZ36D5RLG introduces ≤0.46 V of voltage variation for ±22 mA current change-critical for maintaining tight output regulation in switching power supplies where feedback current varies dynamically.

Is 3EZ36D5RLG suitable for use in automotive under-hood applications?

Yes, the 3EZ36D5RLG is rated for junction temperatures from −65°C to +200°C and features Class 3 ESD immunity (>16 kV HBM), making it suitable for engine control units, transmission control modules, and other under-hood applications where thermal cycling and electrostatic stress are present.

3EZ36D5RLG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 36 V

Tolerance:: ±5%

Power - Max:: 3 W

Impedance (Max) (Zzt):: 22 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 27.4 V

Voltage - Forward (Vf) (Max) @ If:: 1.5 V @ 200 mA

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: Axial

3EZ36D5RLG FAQ

1.How can I place an order for 3EZ36D5RLG through Aetrix?

Please submit a Request for Quotation (RFQ) for 3EZ36D5RLG 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 3EZ36D5RLG reliable?

The price and inventory of 3EZ36D5RLG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3EZ36D5RLG is usually 5 days.

3.What payment methods are accepted for 3EZ36D5RLG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3EZ36D5RLG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 3EZ36D5RLG?

3EZ36D5RLG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 3EZ36D5RLG 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 3EZ36D5RLG?

For technical support, including 3EZ36D5RLG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3EZ36D5RLG requirements.

6.How does Aetrix verify that 3EZ36D5RLG is sourced from the original manufacturer or authorized distributors?

All 3EZ36D5RLG 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 3EZ36D5RLG meets industry standards.

7.What is the process for return or replacement of 3EZ36D5RLG?

All 3EZ36D5RLG units undergo pre-shipment inspection (PSI). If there is an issue with 3EZ36D5RLG, 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 3EZ36D5RLG part is unused and in its original packaging.

Return procedure for 3EZ36D5RLG:

1.Submit a request within 90 days.

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

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