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

onsemi 1N5387BRL

Name: 1N5387BRL
Brand: onsemi
SKU: 1N5387BRL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5387BRL

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: T-18, Axial

Datasheet:: 1N5387BRL.pdf

Description:: DIODE ZENER 190V 5W AXIAL

Quantity:: RFQ Add To RFQ list

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Product details

Overview

1N5387BRL from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 190 V, ±5% tolerance, 5 Ω maximum zener impedance at 1 mA test current, and 0.5 mA maximum leakage current at 144 V reverse voltage. It operates across −65 °C to +200 °C and delivers stable voltage regulation in high-voltage power supply reference and overvoltage protection circuits.

For engineers reviewing the 1N5387BRL datasheet, pinout, applications, or equivalent options, key selection criteria include its 190 V nominal zener voltage, 5 W steady-state power rating, 5 Ω zener impedance at IZT = 1 mA, 450 A maximum surge current (8.3 ms), and axial leaded Surmetic 40 package compatibility with manual and wave soldering.

Technical Context

This device uses silicon-oxide passivated junction technology to achieve tight voltage tolerance (±5%), low zener impedance, and high ESD robustness (Class 3, >16 kV HBM). Its thermal design supports junction-to-lead resistance of 25 °C/W at 3/8″ lead length, enabling reliable operation under pulsed and DC conditions up to 150 °C continuous.

The 1N5387BRL exhibits a positive temperature coefficient above 10 V (≈0.9 mV/°C at 190 V), ensuring predictable drift in high-voltage reference applications. Its surge capability-450 A peak for 8.3 ms-is validated per JEDEC standards and supported by transient thermal response curves in Figure 4 of the datasheet.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	180.5 V (min) to 199.5 V (max) at I_ZT = 1 mA - defines regulation window for high-voltage reference stability
Power Dissipation (P_D)	5 W at T_L = 25 °C - sets maximum continuous DC power handling before thermal derating
Zener Impedance (Z_ZT)	5 Ω max at I_ZT = 1 mA - ensures low dynamic resistance for minimal output voltage variation under load transients
Leakage Current (I_R)	0.5 mA max at V_R = 144 V - guarantees minimal standby power loss in high-impedance bias networks
Surge Current (I_RM)	450 A peak for 8.3 ms - enables robust clamping during lightning-induced or switching-induced transients
Junction Temperature Range	−65 °C to +200 °C - supports operation in harsh industrial and automotive under-hood environments
ESD Rating	Class 3 (>16 kV) per Human Body Model - provides intrinsic protection against assembly-line electrostatic discharge

Pinout & Package

Package: Axial-lead Surmetic 40 (Case 017AA), void-free transfer-molded thermosetting plastic with corrosion-resistant leads and cathode band polarity marking. Lead temperature limit: 260 °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; reverse-biased operation requires anode grounded or at lower potential than cathode
Cathode	Zener breakdown terminal / voltage reference output	Marked with band; supplies stabilized 190 V reference when reverse-biased above V_Z; must be connected to higher-potential rail via current-limiting resistor

Key Features

Feature	Design Value
±5% zener voltage tolerance	Guarantees tight regulation without post-manufacture sorting; reduces BOM variants in high-voltage feedback loops
5 W steady-state power rating	Enables direct replacement of legacy 5 W Zeners without heatsink redesign in space-constrained power supplies
450 A surge rating (8.3 ms)	Provides single-event transient immunity exceeding IEC 61000-4-5 Level 4 requirements for industrial equipment
Pb-free (RoHS-compliant) construction	Meets global environmental compliance mandates without performance trade-offs or solderability degradation
Silicon-oxide passivated junction	Delivers long-term parameter stability and reduced parameter drift over temperature and time vs. non-passivated alternatives

Applications

Industrial Power Supply Reference	Overvoltage Protection Clamp
Use Scenario: Precision voltage reference for isolated flyback controller feedback in 400 V DC bus industrial SMPS. IC Role / Device Role / Timing Role: Zener diode provides stable 190 V reference to optocoupler input, enabling accurate secondary-side regulation. Use Value: Tight ±5% tolerance and low 5 Ω impedance ensure <±1.2% output voltage deviation across line/load/temperature.	Use Scenario: Transient voltage suppression on 277 V AC lighting ballast input stage. IC Role / Device Role / Timing Role: Clamps surges above 199.5 V to protect downstream bridge rectifier and PFC controller. Use Value: 450 A surge rating handles 6 kV/3 A IEC 61000-4-5 combination wave without degradation.
High-Voltage Sensor Biasing	Programmable Threshold Detector
Use Scenario: Biasing network for photodiode amplifier in laser-based industrial position sensor operating from 200 V rail. IC Role / Device Role / Timing Role: Supplies stable 190 V bias to photodiode cathode while blocking leakage with <0.5 mA IR at 144 V. Use Value: Low leakage and high-temperature capability (up to 150 °C) maintain SNR integrity in enclosed enclosures.	Use Scenario: Threshold element in comparator-based battery pack overvoltage cutoff for 16S Li-ion stacks (~200 V). IC Role / Device Role / Timing Role: Triggers shutdown when stack voltage exceeds 199.5 V, using 1N5387BRL as precision reference. Use Value: Guaranteed 180.5–199.5 V range eliminates need for external trimming resistors in production calibration.

Industrial Power Supply Reference

Overvoltage Protection Clamp

Use Scenario: Precision voltage reference for isolated flyback controller feedback in 400 V DC bus industrial SMPS.

IC Role / Device Role / Timing Role: Zener diode provides stable 190 V reference to optocoupler input, enabling accurate secondary-side regulation.

Use Value: Tight ±5% tolerance and low 5 Ω impedance ensure <±1.2% output voltage deviation across line/load/temperature.

Use Scenario: Transient voltage suppression on 277 V AC lighting ballast input stage.

IC Role / Device Role / Timing Role: Clamps surges above 199.5 V to protect downstream bridge rectifier and PFC controller.

Use Value: 450 A surge rating handles 6 kV/3 A IEC 61000-4-5 combination wave without degradation.

High-Voltage Sensor Biasing

Programmable Threshold Detector

Use Scenario: Biasing network for photodiode amplifier in laser-based industrial position sensor operating from 200 V rail.

IC Role / Device Role / Timing Role: Supplies stable 190 V bias to photodiode cathode while blocking leakage with <0.5 mA IR at 144 V.

Use Value: Low leakage and high-temperature capability (up to 150 °C) maintain SNR integrity in enclosed enclosures.

Use Scenario: Threshold element in comparator-based battery pack overvoltage cutoff for 16S Li-ion stacks (~200 V).

IC Role / Device Role / Timing Role: Triggers shutdown when stack voltage exceeds 199.5 V, using 1N5387BRL as precision reference.

Use Value: Guaranteed 180.5–199.5 V range eliminates need for external trimming resistors in production calibration.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5387B	Same electrical specs and package; differs only in packaging format (bulk box vs. tape-and-reel)	No functional difference; 1N5387BRL supports automated SMT placement, while 1N5387B suits manual/hand-soldered prototyping	Select 1N5387BRL for volume production with pick-and-place; choose 1N5387B for low-volume builds or evaluation
SMF190A	Surface-mount SOD-123 package; 190 V nominal, 1 kW peak pulse power, but only 1 W steady-state rating	Not suitable for continuous 5 W dissipation; limited to short-duration clamping, not regulation	Use SMF190A only for transient suppression where average power <1 W; 1N5387BRL remains required for active regulation

Compared with 1N5387B and SMF190A, the 1N5387BRL uniquely combines 5 W continuous power, ±5% tolerance, and tape-and-reel packaging-enabling both high-reliability voltage reference design and high-throughput manufacturing without compromise.

Availability

1N5387BRL is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, high-voltage sensor biasing, and programmable threshold detection requiring stable component supply and RoHS-compliant sourcing.

Supply support for 1N5387BRL 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 belongs to onsemi's Surmetic Zener regulator family, engineered specifically for high-reliability voltage reference and transient suppression in demanding industrial and infrastructure systems.

FAQ

What is the nominal zener voltage and tolerance of the 1N5387BRL?

The 1N5387BRL has a nominal zener voltage of 190 V with a guaranteed tolerance of ±5%, meaning its actual zener voltage falls between 180.5 V and 199.5 V when tested at I_ZT = 1 mA. This tight tolerance is specified per JEDEC standards and applies to all 1N5387BRL units shipped, eliminating need for binning in precision reference designs.

Can the 1N5387BRL be used in continuous 5 W power dissipation applications?

Yes-the 1N5387BRL is rated for 5 W steady-state power dissipation at lead temperature (T_L) = 25 °C with 3/8″ lead length. To sustain full 5 W continuously, thermal management must keep lead temperature ≤25 °C; above that, derating is required at 40 mW/°C. The device's 25 °C/W junction-to-lead thermal resistance enables this rating in properly designed layouts.

What is the maximum surge current rating for the 1N5387BRL and under what conditions?

The 1N5387BRL supports a maximum non-repetitive surge current of 450 A for an 8.3 ms square-wave pulse, as verified per JEDEC test conditions. This rating assumes T_A = 25 °C and proper mounting with contacts located 3/8″ to 1/2″ from the diode body. Surge capability decreases for longer pulses or elevated ambient temperatures per Figure 5 in the datasheet.

Is the 1N5387BRL RoHS-compliant and lead-free?

Yes-the "G" suffix in the ordering code (1N5387BRL, G) confirms the 1N5387BRL is supplied in a Pb-free, RoHS-compliant package. All external surfaces are corrosion resistant, and leads are readily solderable using standard reflow or wave processes with peak temperature up to 260 °C for 10 seconds at 1/16″ from the case.

How does the temperature coefficient affect the 1N5387BRL's performance above 10 V?

As a high-voltage Zener (190 V), the 1N5387BRL exhibits a positive temperature coefficient of approximately +0.9 mV/°C at I_ZT, per Figure 3 of the datasheet. This means its zener voltage increases linearly with junction temperature-critical for predicting regulation drift in uncooled enclosures or high-ambient environments like industrial motor drives.

1N5387BRL Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: T-18, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 190 V

Tolerance:: ±5%

Power - Max:: 5 W

Impedance (Max) (Zzt):: 450 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 144 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

1N5387BRL FAQ

1.How can I place an order for 1N5387BRL through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5387BRL 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 1N5387BRL reliable?

The price and inventory of 1N5387BRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5387BRL is usually 5 days.

3.What payment methods are accepted for 1N5387BRL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5387BRL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5387BRL?

1N5387BRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5387BRL 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 1N5387BRL?

For technical support, including 1N5387BRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5387BRL requirements.

6.How does Aetrix verify that 1N5387BRL is sourced from the original manufacturer or authorized distributors?

All 1N5387BRL 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 1N5387BRL meets industry standards.

7.What is the process for return or replacement of 1N5387BRL?

All 1N5387BRL units undergo pre-shipment inspection (PSI). If there is an issue with 1N5387BRL, 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 1N5387BRL part is unused and in its original packaging.

Return procedure for 1N5387BRL:

1.Submit a request within 90 days.

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

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