My Inquiry
My Account
onsemi 1N5239B_T50R
- Part No.:
- 1N5239B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5239B_T50R.pdf
- Description:
- DIODE ZENER 9.1V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:8,104
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5239B_T50R from ON Semiconductor is a 9.1 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 25°C, with 10 Ω dynamic impedance at 20 mA test current and 3.0 μA maximum reverse leakage at 7.0 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning circuits.
For engineers reviewing the 1N5239B_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal coefficient (+0.068 %/°C), DO-35 mechanical compatibility, and compliance with JEDEC DO-204AH standards.
Technical Context
This device operates in reverse breakdown mode to maintain stable voltage regulation across varying load currents. Its 9.1 V nominal Zener voltage is specified at IZ = 20 mA, with guaranteed min/max limits of 8.645 V and 9.555 V under 5% tolerance.
The 1N5239B_T50R features a low 10 Ω dynamic impedance (ZZ) at 20 mA, enabling tight regulation in feedback networks, and exhibits +0.068 %/°C temperature coefficient - optimized for mid-voltage references where drift must be minimized without active compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal, 8.645–9.555 V range at IZ = 20 mA - defines regulated output level in shunt reference designs |
| Power Dissipation (PD) | 500 mW at TA = 25°C, derated 4.0 mW/°C above 50°C - sets max continuous power handling in PCB-constrained layouts |
| Dynamic Impedance (ZZ) | 10 Ω at IZ = 20 mA - determines voltage deviation under load transients; lower value improves regulation accuracy |
| Reverse Leakage (IR) | ≤3.0 μA at VR = 7.0 V - ensures minimal quiescent current in battery-powered bias networks |
| Temperature Coefficient (TC) | +0.068 %/°C - quantifies VZ drift per degree; enables predictable error budgeting in industrial ambient ranges |
| Package | DO-35 glass axial - hermetically sealed, JEDEC DO-204AH compliant, 0.137 g mass, cathode band marked |
Pinout & Package
DO-35 glass axial package with cathode identified by color band; leads are unmarked anode/cathode terminals suitable for through-hole mounting. Total length 4.56 mm, body diameter 1.91 mm, lead diameter 0.46 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to circuit ground or lowest potential point when used in shunt regulation |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input supply rail; delivers stable 9.1 V to downstream bias or reference circuitry |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables use in cost-sensitive applications requiring moderate accuracy without trimming or calibration |
| Hermetic DO-35 glass package | Provides long-term stability and moisture resistance for industrial and automotive under-hood environments |
| Low 10 Ω dynamic impedance | Supports <±10 mV output variation across 5–25 mA load current changes in precision reference designs |
| +0.068 %/°C temperature coefficient | Delivers <±15 mV total drift over –40°C to +125°C junction range - suitable for unbuffered analog references |
Applications
| Industrial Sensor Signal Conditioning | Low-Power Microcontroller Reset Circuit |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing 9.1 V bias to Wheatstone bridge, rejecting supply ripple. Use Value: 10 Ω ZZ and ±5% VZ ensure bridge output linearity remains within 0.1% FSR across 10–30 V input variations. |
Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Zener-clamped voltage divider feeding RC network to MCU reset pin. Use Value: 3.0 μA IR at 7.0 V minimizes divider current draw, extending battery life in portable IoT nodes. |
| DC-DC Converter Feedback Reference | ESD Protection Clamp in Analog Front-Ends |
Use Scenario: Setting output voltage in isolated flyback converters using optocoupler feedback. IC Role / Device Role / Timing Role: Precision shunt reference replacing TL431 where low-cost, low-current operation is required. Use Value: 9.1 V VZ allows direct use with common optocoupler CTR curves, reducing component count vs. resistor-divider solutions. |
Use Scenario: Protecting ADC inputs from transient overvoltage in medical patient monitoring equipment. IC Role / Device Role / Timing Role: Low-capacitance (<2 pF) clamping diode diverting ESD pulses to ground before IC damage. Use Value: DO-35 glass construction withstands >8 kV HBM ESD events while maintaining <100 ppm/year parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5239B (no suffix) | Identical electrical specs; T50R denotes tape-and-reel packaging per ON Semi standard - same die, same DO-35 package | No functional difference; T50R indicates automated placement compatibility vs. bulk or ammo pack | Select 1N5239B_T50R for SMT assembly lines requiring reel-fed feeders; otherwise 1N5239B suffices for manual or wave solder |
| BZX55C9V1 | Same 9.1 V ±5%, but higher ZZ (15 Ω), higher IR (5 μA @ 7 V), and plastic DO-35 package (less hermetic) | Lower reliability in humid or high-temperature environments; unsuitable for long-life industrial deployments | Choose BZX55C9V1 only for consumer-grade cost-sensitive designs where 15 Ω ZZ and non-hermetic sealing are acceptable |
Compared with 1N5239B_T50R, the base 1N5239B offers identical performance in different packaging, while BZX55C9V1 trades hermeticity and regulation precision for lower cost - making 1N5239B_T50R optimal for reliability-critical analog references.
Availability
1N5239B_T50R is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller reset circuits, DC-DC feedback networks, and analog front-end protection requiring stable component supply and long-term parametric consistency.
Supply support for 1N5239B_T50R 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 manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The 1N52xxB series belongs to ON Semiconductor's legacy Zener diode product line, designed specifically for general-purpose voltage regulation and reference applications where DO-35 form factor, hermetic reliability, and ±5% tolerance meet cost-performance targets.
FAQ
What is the Zener voltage tolerance of the 1N5239B_T50R?
The 1N5239B_T50R has a Zener voltage tolerance of ±5%, resulting in a guaranteed range of 8.645 V to 9.555 V at 20 mA test current and 25°C ambient. This tolerance is confirmed in the ON Semiconductor 1N5221B–1N5263B datasheet Rev. 3, Table on page 2. The 1N5239B_T50R maintains this specification across its full operating temperature range.
Does the 1N5239B_T50R have a hermetic package?
Yes, the 1N5239B_T50R uses a hermetically sealed DO-35 glass package per JEDEC DO-204AH standard, as documented in the ON Semiconductor datasheet section "Package Standard Reference". This construction ensures long-term stability and moisture resistance, critical for industrial and automotive applications where parameter drift must be minimized over 10+ years.
What is the maximum reverse leakage current for the 1N5239B_T50R?
The 1N5239B_T50R specifies a maximum reverse leakage current (IR) of 3.0 μA at VR = 7.0 V and TA = 25°C. This value is listed in the Electrical Characteristics table on page 2 of the ON Semiconductor 1N5221B–1N5263B datasheet Rev. 3. It directly impacts quiescent power in high-impedance bias networks.
How does the temperature coefficient of the 1N5239B_T50R affect its performance?
The 1N5239B_T50R has a temperature coefficient of +0.068 %/°C, meaning its Zener voltage increases by approximately 6.2 mV per °C rise in junction temperature. This positive TC is typical for 9.1 V Zeners and enables predictable drift modeling in unbuffered reference designs - for example, yielding ~±12 mV total shift over –40°C to +85°C ambient.
Is the 1N5239B_T50R compatible with automated SMT placement?
Yes, the "T50R" suffix in 1N5239B_T50R explicitly denotes tape-and-reel packaging per ON Semiconductor's ordering nomenclature, supporting high-speed pick-and-place assembly. The DO-35 axial body is mounted in carrier tape with 50 mm pitch, verified in ON Semi's packaging documentation referenced in the 1N5221B–1N5263B datasheet cover page.
1N5239B_T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 7 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
1N5239B_T50R FAQ
1.How can I place an order for 1N5239B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5239B_T50R 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 1N5239B_T50R reliable?
The price and inventory of 1N5239B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5239B_T50R is usually 5 days.
3.What payment methods are accepted for 1N5239B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5239B_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5239B_T50R?
1N5239B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5239B_T50R 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 1N5239B_T50R?
For technical support, including 1N5239B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5239B_T50R requirements.
6.How does Aetrix verify that 1N5239B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N5239B_T50R 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 1N5239B_T50R meets industry standards.
7.What is the process for return or replacement of 1N5239B_T50R?
All 1N5239B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N5239B_T50R, 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 1N5239B_T50R part is unused and in its original packaging.
Return procedure for 1N5239B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5239B_T50R Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
