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onsemi 1N6003B_T50R
- Part No.:
- 1N6003B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N6003B_T50R.pdf
- Description:
- DIODE ZENER 13V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:5,033
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Product details
Overview
1N6003B_T50R from Fairchild Semiconductor is a 13 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C with 4.0 mW/°C derating, 25 Ω zener impedance at 5 mA test current, and 0.1 mA leakage current at 9.9 V reverse voltage. It provides precision voltage regulation in low-power analog reference and overvoltage clamp circuits.
For engineers reviewing the 1N6003B_T50R datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, cathode identification per DO-35 marking convention, and direct alternative options for 13 V Zener regulation.
Technical Context
This device operates as a two-terminal silicon Zener diode with sharp reverse breakdown at nominal 13 V, specified under thermal equilibrium conditions at lead temperature TL = 30°C ±1°C and 3/8″ lead length. Its 25 Ω dynamic impedance at 5 mA ensures stable regulation across moderate load variations.
The 0.1 mA maximum leakage current at VR = 9.9 V confirms tight low-voltage blocking performance, while the 600 Ω knee impedance at IZK = 250 μA supports reliable turn-on in low-current bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.35–13.65 V @ 5 mA - defines regulated output range for precision reference design |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous thermal load on PCB trace or heatsink |
| Zener Impedance (ZZ) | 25 Ω @ IZ = 5 mA - determines output voltage variation under 1 mA load change |
| Leakage Current (IR) | 0.1 mA @ VR = 9.9 V - ensures minimal quiescent current in standby clamp circuits |
| Max Zener Current (IZM) | 38 mA - establishes absolute upper limit for transient surge handling capability |
| Operating Temp Range | −65 to +200°C - enables use in automotive under-hood and industrial high-temp environments |
Pinout & Package
DO-35 glass axial package with cathode identified by color band; two-terminal device with no internal polarity-sensitive circuitry beyond standard Zener junction orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node in reverse-bias regulation configuration |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with color band; supplies regulated voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-manufacture trimming in cost-sensitive designs |
| DO-35 glass package | Provides hermetic sealing and stable long-term parameter drift for industrial-grade reliability |
| 600 Ω knee impedance (ZZK) | Ensures smooth transition into breakdown for low-noise biasing of op-amp input stages |
| 200°C max junction temperature | Supports operation in sealed enclosures or near heat-generating components without derating |
Applications
| Industrial Sensor Reference | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Precision 13 V reference for 12-bit ADC biasing in factory-floor temperature transmitters. IC Role / Device Role / Timing Role: Zener diode providing stable voltage reference for analog front-end scaling network. Use Value: 25 Ω ZZ limits reference error to <±12 mV under 0.5 mA load shift, meeting EN 61000-4-5 surge immunity requirements. |
Use Scenario: Reverse-biased protection element on USB VBUS line against 15 V ESD events. IC Role / Device Role / Timing Role: Clamping diode diverting transient energy to ground before IC damage threshold. Use Value: 38 mA IZM withstands 8 kV contact discharge per IEC 61000-4-2 without degradation. |
| Low-Power Microcontroller Reset Circuit | Linear Regulator Feedback Divider |
Use Scenario: Threshold detection for brown-out reset in battery-powered IoT nodes operating down to 2.2 V. IC Role / Device Role / Timing Role: Zener-based comparator reference enabling deterministic reset assertion at 13 V supply rail. Use Value: 0.1 mA IR at 9.9 V minimizes standby current drain, extending shelf life in storage mode. |
Use Scenario: Voltage-setting element in adjustable LDO feedback network for programmable 13 V output. IC Role / Device Role / Timing Role: Precision Zener replacing resistor divider to improve load regulation accuracy. Use Value: ±5% VZ tolerance eliminates need for external calibration, reducing BOM count by one trim potentiometer. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, ±5%, 1 W rating, DO-41 package | Higher power handling but larger footprint; requires PCB layout revision | Select when >500 mW surge energy absorption is required and board space permits DO-41 |
| BZX55-C13 | 13 V nominal, ±5%, 500 mW, DO-35, 30 Ω ZZ @ 5 mA | Nearly identical electrical specs; different manufacturer marking and qualification pedigree | Choose for second-source assurance where Fairchild supply continuity is constrained |
Compared with 1N6003B_T50R, the 1N4742A offers higher power margin at the cost of larger DO-41 packaging, while the BZX55-C13 matches key parameters in the same DO-35 form factor but originates from a different process lineage and qualification standard.
Availability
1N6003B_T50R is available at Aetrix Electronics and suitable for industrial sensor reference, USB port overvoltage clamp, and low-power microcontroller reset circuits requiring stable component supply and consistent Zener voltage distribution.
Supply support for 1N6003B_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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, signal conditioning, and discrete devices before its acquisition by ON Semiconductor in 2016.
The 1N6003B_T50R belongs to Fairchild's legacy 1N5985B–1N6025B Zener diode family, engineered for general-purpose voltage regulation and clamping in cost-sensitive industrial and consumer electronics.
FAQ
What is the exact Zener voltage range for 1N6003B_T50R at 5 mA test current?
The 1N6003B_T50R has a guaranteed Zener voltage range of 12.35 V to 13.65 V when measured at 5 mA test current and thermal equilibrium at TL = 30°C ±1°C. This 13 V nominal value with ±5% tolerance is confirmed in the Fairchild 1N5985B–1N6025B Rev. C2 datasheet, Table on page 2.
Does 1N6003B_T50R have a specified forward voltage?
Yes - the 1N6003B_T50R has a maximum forward voltage of 1.2 V at 200 mA forward current, as stated in the "VF Forward Voltage" specification on page 2 of the Fairchild datasheet. This parameter applies only during forward conduction and is not used in standard Zener regulation mode.
How is the cathode identified on the 1N6003B_T50R DO-35 package?
The cathode of the 1N6003B_T50R is marked by a visible color band on the DO-35 glass body, consistent with industry-standard Zener diode marking. The band aligns with the third-line marking "3B" per Fairchild's top-marking specification on page 3 of the datasheet.
What is the maximum allowable Zener current for continuous operation of 1N6003B_T50R?
The maximum Zener current (IZM) for the 1N6003B_T50R is 38 mA at 25°C ambient, derived from its 500 mW power rating and nominal 13 V breakdown voltage. At elevated temperatures, this must be reduced per the 4.0 mW/°C derating curve above 75°C lead temperature.
Is 1N6003B_T50R suitable for automotive under-hood applications?
Yes - the 1N6003B_T50R supports an operating temperature range of −65°C to +200°C and is housed in a hermetically sealed DO-35 glass package. These characteristics meet baseline requirements for non-safety-critical under-hood functions such as sensor biasing and supply rail monitoring.
1N6003B_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):
- 13 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 9.9 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
1N6003B_T50R FAQ
1.How can I place an order for 1N6003B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6003B_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 1N6003B_T50R reliable?
The price and inventory of 1N6003B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6003B_T50R is usually 5 days.
3.What payment methods are accepted for 1N6003B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6003B_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6003B_T50R?
1N6003B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6003B_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 1N6003B_T50R?
For technical support, including 1N6003B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6003B_T50R requirements.
6.How does Aetrix verify that 1N6003B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N6003B_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 1N6003B_T50R meets industry standards.
7.What is the process for return or replacement of 1N6003B_T50R?
All 1N6003B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N6003B_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 1N6003B_T50R part is unused and in its original packaging.
Return procedure for 1N6003B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6003B_T50R Tags
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