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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

onsemi BAY72TR

Name: BAY72TR
Brand: onsemi
SKU: BAY72TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BAY72TR

Manufacturer:: onsemi

Category:: Single Diodes

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

Datasheet:: BAY72TR.pdf

Description:: DIODE GEN PURP 125V 200MA DO35

Quantity:: RFQ Add To RFQ list

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Inventory:7,740

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Product details

Overview

BAY72TR from ON Semiconductor is a small-signal switching diode in DO-35 glass package, rated for 125 V repetitive reverse voltage (V_RRM), 200 mA average forward current (I_F(AV)), and 500 mW power dissipation (P_D). It delivers fast reverse recovery (t_rr1 = 50 ns at I_F = I_R = 30 mA) and low junction capacitance (C_T = 5 pF at V_R = 0 V, f = 1 MHz), making it suitable for high-frequency signal demodulation and clamp protection in consumer audio amplifiers.

For engineers reviewing the BAY72TR datasheet, pinout, applications, or equivalent options, key selection considerations include its 125 V V_RRM, 50 ns t_rr1, 5 pF C_T, cathode-band polarity marking, and DO-35 axial leaded package compatibility with through-hole PCB assembly and automated tape-and-reel handling.

Technical Context

This silicon planar epitaxial diode operates as a unidirectional voltage-controlled switch with low forward voltage drop (V_F = 0.63 V at I_F = 10 mA) and minimal leakage (I_R = 100 nA at V_R = 100 V, T_A = 25°C). Its thermal resistance (R_θJA = 300°C/W) and 175°C maximum junction temperature support operation in compact, non-heatsinked analog signal paths.

The device exhibits two distinct reverse recovery time specifications: t_rr1 = 50 ns under low-current commutation (I_F = I_R = 30 mA, I_rr = 1.0 mA), and t_rr2 = 400 ns under higher-voltage switching (I_F = 30 mA, V_R = 35 V), indicating design suitability for both RF envelope detection and moderate-speed logic-level clamping.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	125 V - supports signal routing in 100 V rail systems without breakdown
I_F(AV)	200 mA - enables continuous biasing of small-signal transistor stages
t_rr1	50 ns - ensures minimal distortion in AM/FM detector circuits up to ~10 MHz
C_T	5 pF at 0 V - preserves high-frequency impedance matching in RF coupling networks
V_F	0.63 V at 10 mA - reduces forward conduction loss in precision clamp applications
I_R	100 nA at 100 V - maintains signal integrity in high-impedance sample-and-hold nodes

Pinout & Package

DO-35 glass axial-leaded package with cathode indicated by color band; leads are tin-plated copper alloy, compatible with wave and hand soldering per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node in clamping or rectification path
Cathode	Forward current exit / reverse-blocking terminal	Marked with color band; ties to reference or higher-potential node

Key Features

Feature	Design Value
Fast switching speed	t_rr1 = 50 ns enables use in 10–20 MHz signal processing without tailing artifacts
Low junction capacitance	C_T = 5 pF minimizes loading on tuned RF circuits and crystal oscillator feedback paths
Stable high-temperature operation	Junction rating up to 175°C supports reliability in sealed consumer enclosures
Precision forward voltage	V_F = 0.63 V @ 10 mA allows predictable threshold setting in analog comparators

Applications

AM Radio Detector	Audio Input Clamp
Use Scenario: Demodulating amplitude-modulated carrier signals in portable AM receivers. IC Role / Device Role / Timing Role: Signal-level half-wave rectifier converting RF envelope to baseband audio. Use Value: 50 ns t_rr1 and 5 pF C_T preserve modulation fidelity up to 1.6 MHz without high-frequency roll-off or phase distortion.	Use Scenario: Protecting line-in inputs of analog audio codecs from ESD-induced overvoltage. IC Role / Device Role / Timing Role: Bidirectional clamping diode limiting input swing to ±0.7 V around ground. Use Value: Low V_F (0.63 V) and sub-100 nA I_R prevent DC offset and signal attenuation during normal operation.
Oscillator Frequency Stabilizer	Logic-Level Translator
Use Scenario: Biasing varactor diodes or stabilizing Colpitts oscillator tank voltage in VHF transceivers. IC Role / Device Role / Timing Role: DC blocking and RF decoupling element in crystal oscillator feedback loop. Use Value: 5 pF C_T provides predictable reactance at 27–108 MHz, while 125 V V_RRM accommodates peak tank voltages.	Use Scenario: Level-shifting TTL outputs to CMOS-compatible thresholds in mixed-voltage digital interfaces. IC Role / Device Role / Timing Role: Passive voltage threshold translator enabling 5 V → 3.3 V signal conversion. Use Value: Consistent 0.63 V V_F ensures reliable turn-on across temperature, supporting timing-critical edge detection.

AM Radio Detector

Audio Input Clamp

Use Scenario: Demodulating amplitude-modulated carrier signals in portable AM receivers.

IC Role / Device Role / Timing Role: Signal-level half-wave rectifier converting RF envelope to baseband audio.

Use Value: 50 ns t_rr1 and 5 pF C_T preserve modulation fidelity up to 1.6 MHz without high-frequency roll-off or phase distortion.

Use Scenario: Protecting line-in inputs of analog audio codecs from ESD-induced overvoltage.

IC Role / Device Role / Timing Role: Bidirectional clamping diode limiting input swing to ±0.7 V around ground.

Use Value: Low V_F (0.63 V) and sub-100 nA I_R prevent DC offset and signal attenuation during normal operation.

Oscillator Frequency Stabilizer

Logic-Level Translator

Use Scenario: Biasing varactor diodes or stabilizing Colpitts oscillator tank voltage in VHF transceivers.

IC Role / Device Role / Timing Role: DC blocking and RF decoupling element in crystal oscillator feedback loop.

Use Value: 5 pF C_T provides predictable reactance at 27–108 MHz, while 125 V V_RRM accommodates peak tank voltages.

Use Scenario: Level-shifting TTL outputs to CMOS-compatible thresholds in mixed-voltage digital interfaces.

IC Role / Device Role / Timing Role: Passive voltage threshold translator enabling 5 V → 3.3 V signal conversion.

Use Value: Consistent 0.63 V V_F ensures reliable turn-on across temperature, supporting timing-critical edge detection.

Equivalent & Alternatives

The following parts are listed as comparable options for similar small-signal diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4148WS	SMD SOD-323 package; identical V_RRM (100 V), slightly slower t_rr (4 ns typical but not specified under same test conditions)	Requires rework for surface-mount assembly; unsuitable for through-hole legacy designs	Select when board space is constrained and reflow capability exists
FDL100	DO-35 package; V_RRM = 100 V, t_rr = 4 ns (measured), C_T = 4 pF - faster but lower voltage rating	Limited to ≤100 V signal rails; better for >50 MHz RF but less margin in 12 V–24 V industrial clamps	Select when ultra-fast recovery dominates over reverse voltage headroom

Compared with 1N4148WS and FDL100, the BAY72TR offers the highest V_RRM (125 V) in DO-35 form factor, balancing robustness for 100 V transient suppression with proven 50 ns switching in analog demodulation-making it optimal for cost-sensitive through-hole designs requiring voltage margin and RF linearity.

Availability

BAY72TR is available at Aetrix Electronics and suitable for AM radio detectors, audio input clamps, oscillator frequency stabilizers, and logic-level translators requiring stable component supply across production lifecycles.

Supply support for BAY72TR 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

ON Semiconductor is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and communication markets.

The BAY72TR belongs to ON Semiconductor's legacy small-signal diode product line, originally developed by Fairchild and optimized for high-frequency analog signal conditioning and protection in cost-sensitive consumer electronics.

FAQ

What is the maximum operating junction temperature for the BAY72TR?

The BAY72TR has a maximum operating junction temperature (T_J) of 175°C, verified per absolute maximum ratings in the official ON Semiconductor datasheet. This rating allows sustained operation in thermally confined environments such as sealed audio amplifier enclosures or densely packed consumer PCBs where ambient temperatures reach 85°C and self-heating adds up to 90°C. The BAY72TR must be derated above 25°C ambient per its R_θJA = 300°C/W specification.

Does the BAY72TR have a specified reverse recovery time under standard test conditions?

Yes, the BAY72TR specifies two reverse recovery times: t_rr1 = 50 ns measured at I_F = I_R = 30 mA and I_rr = 1.0 mA, and t_rr2 = 400 ns measured at I_F = 30 mA and V_R = 35 V. These values are published in the ON Semiconductor BAY72 datasheet and apply directly to the BAY72TR ordering variant, confirming its suitability for medium-speed switching applications like AM detector circuits and analog clamps.

Is the BAY72TR pin-compatible with the 1N4148?

No, the BAY72TR is not pin-compatible with the 1N4148 in functional or mechanical terms. While both are DO-35 packaged diodes with axial leads, the BAY72TR has different electrical characteristics-including higher V_RRM (125 V vs. 100 V), slower t_rr1 (50 ns vs. ~4 ns), and higher C_T (5 pF vs. ~4 pF)-and no documentation confirms interchangeability. Substituting BAY72TR for 1N4148 requires validation of circuit timing, voltage margin, and RF loading effects.

What does the "TR" suffix indicate in BAY72TR?

The "TR" suffix in BAY72TR denotes tape-and-reel packaging: 10,000 units per reel, designed for automated pick-and-place assembly. This distinguishes it from bulk (BAY72) or ammo-pack (BAY72A) variants. All electrical and thermal specifications remain identical across BAY72, BAY72A, and BAY72TR-the "TR" solely indicates packaging format and does not affect the BAY72TR die or performance.

Can the BAY72TR be used in place of a Zener diode for voltage reference?

No, the BAY72TR is not a Zener diode and lacks controlled reverse breakdown characteristics. It is rated for V_RRM = 125 V but does not specify a sharp, stable Zener voltage or minimum/maximum breakdown tolerance. Its reverse leakage (I_R = 100 nA at 100 V) rises gradually beyond V_RRM, making it unsuitable for precision voltage regulation. For reference applications, dedicated Zeners like BZX55C5V1 should be used instead of the BAY72TR.

BAY72TR Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 125 V

Current - Average Rectified (Io):: 200mA

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 100 mA

Speed:: Small Signal =< 200mA (Io), Any Speed

Reverse Recovery Time (trr):: 50 ns

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

Capacitance @ Vr, F:: 5pF @ 0V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-35

Operating Temperature - Junction:: 175°C (Max)

BAY72TR FAQ

1.How can I place an order for BAY72TR through Aetrix?

Please submit a Request for Quotation (RFQ) for BAY72TR 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 BAY72TR reliable?

The price and inventory of BAY72TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAY72TR is usually 5 days.

3.What payment methods are accepted for BAY72TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAY72TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BAY72TR?

BAY72TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BAY72TR 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 BAY72TR?

For technical support, including BAY72TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAY72TR requirements.

6.How does Aetrix verify that BAY72TR is sourced from the original manufacturer or authorized distributors?

All BAY72TR 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 BAY72TR meets industry standards.

7.What is the process for return or replacement of BAY72TR?

All BAY72TR units undergo pre-shipment inspection (PSI). If there is an issue with BAY72TR, 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 BAY72TR part is unused and in its original packaging.

Return procedure for BAY72TR:

1.Submit a request within 90 days.

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

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