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

onsemi 1N5247BTR

Name: 1N5247BTR
Brand: onsemi
SKU: 1N5247BTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5247BTR

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: DO-204AH, DO-35, Axial

Datasheet:: 1N5247BTR.pdf

Description:: DIODE ZENER 17V 500MW DO35

Quantity:: RFQ Add To RFQ list

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Inventory:29,431

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Product details

Overview

1N5247BTR from onsemi is a 17 V, 500 mW axial-lead Zener diode in DO-204AH (Case 017AG) glass package, with 19 Ω dynamic impedance at 7.4 mA test current, ±0.084 %/°C temperature coefficient, and 0.1 μA reverse leakage at 13 V, used for precision voltage regulation in low-power analog reference circuits.

For engineers reviewing the 1N5247BTR datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5%), thermal stability, low leakage at rated VR, and compatibility with through-hole PCB assembly and tape-and-reel automated placement.

Technical Context

This discrete Zener diode operates in reverse breakdown to maintain stable DC voltage across its terminals under varying load or supply conditions. Its 17.0 V nominal zener voltage is specified at 7.4 mA test current, with tight 16.15–17.85 V min/max range and low 19 Ω impedance ensuring minimal output variation with current shifts.

The device uses hermetically sealed glass packaging (JEDEC DO-204AH) for high reliability and moisture resistance, with operating junction temperature spanning −65 °C to +200 °C and 500 mW power dissipation derated above 50 °C at 4.0 mW/°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	17.0 V nominal, 16.15–17.85 V range at I_Z = 7.4 mA - defines regulated output voltage with ±5% tolerance
Dynamic Impedance (Z_Z)	19 Ω at I_Z = 7.4 mA - determines voltage deviation under load current changes
Reverse Leakage (I_R)	0.1 μA max at V_R = 13.0 V - ensures minimal quiescent power loss in standby regulation
Temperature Coefficient (TC)	+0.084 %/°C - quantifies zener voltage drift per degree Celsius near room temperature
Power Dissipation (P_D)	500 mW at T_A = 25 °C, derated linearly above 50 °C - sets maximum continuous thermal load capability
Package	DO-204AH (Case 017AG), axial lead, Pb-free/halide-free glass - enables manual soldering and automated tape-and-reel placement

Pinout & Package

Two-terminal axial-leaded device in hermetically sealed glass package (JEDEC DO-204AH / Case 017AG), with cathode marked by band. No polarity-sensitive internal circuitry - terminals are anode and cathode only.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connected to lower-potential node in reverse-bias regulation configuration
Cathode	Zener breakdown terminal	Marked with band; connected to higher-potential node to enable controlled reverse conduction

Key Features

Feature	Design Value
Tight zener voltage tolerance	±5% (16.15–17.85 V) - reduces need for post-regulation trimming in reference designs
Low dynamic impedance	19 Ω at 7.4 mA - maintains <100 mV output shift over ±1 mA load variation
Stable temperature coefficient	+0.084 %/°C - limits drift to <14 mV/°C near 17 V, supporting industrial-temperature operation
Hermetic glass construction	JEDEC DO-204AH package - provides long-term parameter stability and humidity immunity

Applications

Industrial Sensor Reference	Low-Power Microcontroller Reset
Use Scenario: Providing stable 17 V bias for precision op-amp input stages in pressure transducer signal conditioning modules. IC Role / Device Role / Timing Role: Voltage reference element establishing fixed reference potential for analog front-end gain and offset calibration. Use Value: Enables <0.1% full-scale error over −40 to +85 °C due to low TC and tight V_Z tolerance.	Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers in battery-powered IoT edge nodes. IC Role / Device Role / Timing Role: Zener-clamped divider supplying accurate brown-out detection voltage to reset supervisor ICs. Use Value: Ensures reliable reset assertion at 13 V (75% of V_Z) with sub-μA leakage preserving battery life.
Linear Power Supply Shunt Regulator	ESD-Protected Analog Input Clamp
Use Scenario: Shunt regulation stage in unregulated 24 V DC adapter feeding 17 V analog subsystems. IC Role / Device Role / Timing Role: Passive voltage clamp dissipating excess current to hold output at precise 17 V. Use Value: Handles up to 29.4 mA continuous shunt current (500 mW / 17 V) without thermal runaway.	Use Scenario: Secondary protection clamping element on 16 V-rated instrumentation amplifier inputs. IC Role / Device Role / Timing Role: Overvoltage limiter conducting during ESD transients while remaining non-conductive at normal operating voltage. Use Value: Blocks >13 V with 0.1 μA leakage, then clamps sharply at 17 V to divert >1 A transient energy.

Industrial Sensor Reference

Low-Power Microcontroller Reset

Use Scenario: Providing stable 17 V bias for precision op-amp input stages in pressure transducer signal conditioning modules.

IC Role / Device Role / Timing Role: Voltage reference element establishing fixed reference potential for analog front-end gain and offset calibration.

Use Value: Enables <0.1% full-scale error over −40 to +85 °C due to low TC and tight V_Z tolerance.

Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers in battery-powered IoT edge nodes.

IC Role / Device Role / Timing Role: Zener-clamped divider supplying accurate brown-out detection voltage to reset supervisor ICs.

Use Value: Ensures reliable reset assertion at 13 V (75% of V_Z) with sub-μA leakage preserving battery life.

Linear Power Supply Shunt Regulator

ESD-Protected Analog Input Clamp

Use Scenario: Shunt regulation stage in unregulated 24 V DC adapter feeding 17 V analog subsystems.

IC Role / Device Role / Timing Role: Passive voltage clamp dissipating excess current to hold output at precise 17 V.

Use Value: Handles up to 29.4 mA continuous shunt current (500 mW / 17 V) without thermal runaway.

Use Scenario: Secondary protection clamping element on 16 V-rated instrumentation amplifier inputs.

IC Role / Device Role / Timing Role: Overvoltage limiter conducting during ESD transients while remaining non-conductive at normal operating voltage.

Use Value: Blocks >13 V with 0.1 μA leakage, then clamps sharply at 17 V to divert >1 A transient energy.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5247B	Bulk bag packaging (not tape-and-reel); identical electrical specs and package	Manual assembly or low-volume prototyping where reel handling is unnecessary	Select 1N5247BTR when automated SMT placement or inventory standardization requires tape-and-reel format
BZX55-C16	16 V nominal V_Z, ±5% tolerance, 100 Ω Z_Z at 5 mA, DO-35 package	Lower voltage regulation with higher impedance - suitable where tighter regulation not required	Choose BZX55-C16 only if system tolerates wider output variation and 16 V target suffices

Compared with 1N5247B (identical specs, bulk packaging) and BZX55-C16 (lower voltage, higher impedance), the 1N5247BTR delivers optimal trade-off of precision, thermal stability, and production-ready packaging for 17 V reference and shunt regulation.

Availability

1N5247BTR is available at Aetrix Electronics and suitable for industrial sensor references, low-power microcontroller reset circuits, and linear power supply shunt regulators requiring stable component supply and consistent parametric performance across manufacturing lots.

Supply support for 1N5247BTR 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 1N52xxB series belongs to onsemi's general-purpose Zener diode product line, engineered for cost-effective, high-reliability voltage regulation and reference in space-constrained, thermally demanding environments.

FAQ

What is the nominal zener voltage and tolerance of the 1N5247BTR?

The 1N5247BTR has a nominal zener voltage of 17.0 V with a guaranteed range of 16.15 V to 17.85 V at 7.4 mA test current, corresponding to a ±5% tolerance. This specification is measured under thermal equilibrium at lead temperature of 30°C ±1°C with 3/8″ lead length, per onsemi's datasheet Rev. 5 (November 2023). The 1N5247BTR maintains this tolerance across its qualified operating temperature range.

Does the 1N5247BTR have a defined forward voltage specification?

Yes - the 1N5247BTR specifies a maximum forward voltage (V_F) of 1.2 V at forward current (I_F) = 200 mA, as stated in the "VF Forward Voltage" note on page 2 of the onsemi datasheet. While primarily used in reverse-bias regulation, this V_F rating supports use in polarity-protection or OR-ing configurations where forward conduction may occur. The 1N5247BTR's glass DO-204AH package ensures consistent V_F behavior across production lots.

What is the maximum reverse leakage current for the 1N5247BTR and at what voltage is it specified?

The 1N5247BTR exhibits a maximum reverse leakage current (I_R) of 0.1 μA at reverse voltage (V_R) = 13.0 V, per the Electrical Characteristics table on page 2 of the onsemi datasheet. This low leakage ensures minimal power loss in high-impedance reference networks and supports long battery life in always-on monitoring circuits. The 1N5247BTR achieves this performance within its rated junction temperature range of −65 °C to +200 °C.

Is the 1N5247BTR RoHS compliant and what packaging option does the 'TR' suffix indicate?

Yes - the 1N5247BTR is Pb-free and halide-free, meeting RoHS Directive 2011/65/EU requirements, as confirmed in the "TOP MARKING AND ORDERING INFORMATION" section (page 3) of the onsemi datasheet. The 'TR' suffix denotes tape-and-reel packaging: 5,000 units per reel, compatible with automated pick-and-place equipment. This distinguishes the 1N5247BTR from the bulk-packaged 1N5247B variant while maintaining identical electrical and thermal specifications.

How does the temperature coefficient of the 1N5247BTR affect its regulation accuracy over temperature?

The 1N5247BTR has a temperature coefficient of +0.084 %/°C, meaning its zener voltage increases by approximately 14.3 mV per °C rise near 17 V. Over a −40 °C to +85 °C ambient range, this contributes up to ±1.06 V total drift - but actual system-level drift is mitigated by design techniques like temperature-compensated dividers. The 1N5247BTR's low TC value reflects optimization for stable mid-voltage regulation where higher-voltage Zeners typically exhibit greater drift.

1N5247BTR Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: DO-204AH, DO-35, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 17 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 19 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 13 V

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 200 mA

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-35

1N5247BTR FAQ

1.How can I place an order for 1N5247BTR through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5247BTR 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 1N5247BTR reliable?

The price and inventory of 1N5247BTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5247BTR is usually 5 days.

3.What payment methods are accepted for 1N5247BTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5247BTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5247BTR?

1N5247BTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5247BTR 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 1N5247BTR?

For technical support, including 1N5247BTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5247BTR requirements.

6.How does Aetrix verify that 1N5247BTR is sourced from the original manufacturer or authorized distributors?

All 1N5247BTR 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 1N5247BTR meets industry standards.

7.What is the process for return or replacement of 1N5247BTR?

All 1N5247BTR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5247BTR, 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 1N5247BTR part is unused and in its original packaging.

Return procedure for 1N5247BTR:

1.Submit a request within 90 days.

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

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