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onsemi 1N6017B
- Part No.:
- 1N6017B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N6017B.pdf
- Description:
- DIODE ZENER 51V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:6,907
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Product details
Overview
1N6017B from Fairchild Semiconductor is a 51 V, ±5% tolerance Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C with 4.0 mW/°C derating, designed for precision voltage regulation and reference applications in industrial power supplies and analog circuits.
For engineers reviewing the 1N6017B datasheet, pinout, applications, or equivalent options, key selection criteria include its 51 V nominal Zener voltage at 2 mA test current, 1300 Ω dynamic impedance at IZ, 0.1 mA leakage current at 39 V reverse bias, and DO-35 mechanical compatibility with standard axial-leaded PCB layouts.
Technical Context
The 1N6017B operates as a two-terminal silicon Zener diode with sharp reverse breakdown at precisely defined voltage, relying on avalanche mechanism above ~6 V. Its thermal equilibrium Zener voltage measurement condition specifies 30°C ±1°C lead temperature and 3/8″ lead length, ensuring repeatable calibration across production lots.
It exhibits 1300 Ω Zener impedance at 2 mA test current and 900 Ω knee impedance at 250 μA, supporting stable regulation under light-load conditions. Maximum Zener current is 180 mA, derived from power derating curves and actual operating voltage at the design point.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 48.45 V min / 51 V typ / 53.55 V max @ IZ = 2 mA - defines regulated output voltage window under nominal bias |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous thermal load without forced cooling |
| Zener Impedance (ZZ) | 1300 Ω @ IZ = 2 mA - indicates voltage stability under small-signal AC variations |
| Knee Impedance (ZZK) | 900 Ω @ IZK = 250 μA - determines low-current regulation fidelity near turn-on threshold |
| Leakage Current (IR) | 0.1 mA @ VR = 39 V - ensures minimal standby power loss in high-impedance bias networks |
| Max Zener Current (IZM) | 180 mA - derived from PD and VZ, limits peak surge capability in transient suppression |
| Operating Temp Range | –65°C to +200°C - enables deployment in extended-temperature industrial and automotive under-hood environments |
Pinout & Package
DO-35 glass axial package with cathode indicated by color band; leads are tinned copper alloy, 0.46 mm diameter, 25.4 mm minimum length, compliant with MIL-STD-202 method 208 for lead integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to circuit ground or lowest potential point in shunt regulator topology |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input supply via current-limiting resistor; delivers stable 51 V reference |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables direct replacement in legacy designs requiring tight reference accuracy without recalibration |
| DO-35 glass package | Provides hermetic sealing and high reliability in humid or chemically aggressive environments |
| 250 μA knee current specification | Guarantees usable regulation down to ultra-low-power sensor bias networks |
| 180 mA maximum Zener current | Supports transient overvoltage clamping in 12–48 V DC systems with appropriate series resistance |
| –65°C to +200°C operating range | Validates use in aerospace power conditioning and oilfield downhole electronics |
Applications
| Industrial Power Supply Reference | Automotive ECU Voltage Clamp |
|---|---|
Use Scenario: Precision 51 V reference in linear post-regulator stage of programmable bench power supply. IC Role / Device Role / Timing Role: Shunt voltage reference providing feedback setpoint to error amplifier. Use Value: ±5% VZ tolerance and 1300 Ω ZZ ensure <±0.5% output voltage drift over line/load/temperature. |
Use Scenario: Reverse-biased protection device across 42 V battery rail in 48 V mild-hybrid vehicle control unit. IC Role / Device Role / Timing Role: Overvoltage clamp limiting transients to 53.55 V during load-dump events. Use Value: 180 mA IZM and 200°C TJ rating sustain repeated 100 ms surges without degradation. |
| Test Equipment Calibration Source | Telecom Line Interface Protection |
Use Scenario: Stable reference in portable multimeter auto-ranging circuitry requiring traceable 50 V benchmark. IC Role / Device Role / Timing Role: Primary voltage reference for ADC reference divider network. Use Value: 0.1 mA IR at 39 V ensures <1 μA loading error in high-Z 10 MΩ input dividers. |
Use Scenario: Secondary protection element in -48 V telecom central office line card surge path. IC Role / Device Role / Timing Role: Fast-response clamping diode coordinated with primary GDT and MOV stages. Use Value: DO-35 package allows placement within 2 mm of connector entry point per IEC 61000-4-5 layout rules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5238B (ON Semiconductor) | 50 V nominal, ±5%, DO-35, 500 mW, ZZ = 1700 Ω @ 20 mA - higher test current, higher ZZ | Optimized for higher-current regulation; less suitable for micro-power bias networks | Select when operating IZ > 10 mA and tighter VZ tempco required |
| BZX55-C51 (Vishay) | 51 V nominal, ±5%, DO-35, 500 mW, ZZ = 1200 Ω @ 5 mA - different test current, lower ZZ but higher IZ | Requires 2.5× higher bias current for spec compliance; not drop-in for 2 mA designs | Select only if existing 5 mA bias network exists and 1200 Ω ZZ improves loop stability |
Compared with 1N6017B, the 1N5238B demands higher operating current and offers inferior low-current regulation, while the BZX55-C51 requires redesign of bias resistors to meet its 5 mA test condition - neither is pin-compatible without circuit validation.
Availability
1N6017B is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, and telecom line interface circuits requiring stable component supply and long-term obsolescence management.
Supply support for 1N6017B 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, analog, and discrete components before its acquisition by ON Semiconductor in 2016; its legacy Zener diodes remain industry benchmarks for reliability.
The 1N6017B belongs to Fairchild's 1N5985B–1N6025B family of general-purpose Zener diodes engineered for voltage regulation, reference, and overvoltage protection in cost-sensitive industrial and automotive systems.
FAQ
What is the nominal Zener voltage and tolerance of the 1N6017B?
The 1N6017B has a nominal Zener voltage of 51 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 48.45 V and 53.55 V when measured at 2 mA test current and 30°C lead temperature. This tolerance band is guaranteed across the full operating temperature range and supports interchangeability in legacy 51 V reference designs without recalibration.
What is the maximum power dissipation and thermal derating behavior of the 1N6017B?
The 1N6017B is rated for 500 mW power dissipation at a lead temperature (TL) of ≤75°C, with a linear derating factor of 4.0 mW/°C above that temperature. This means at 100°C lead temperature, its usable power drops to 400 mW. The derating curve is defined per MIL-STD-202 method 108 and assumes 3/8″ lead length in free air.
What is the Zener impedance of the 1N6017B and how does it affect regulation performance?
The 1N6017B exhibits a Zener impedance (ZZ) of 1300 Ω at 2 mA test current and 900 Ω at 250 μA (ZZK). This impedance directly impacts output voltage variation under changing load current: for example, a 1 mA AC ripple current produces ~1.3 V peak-to-peak variation at the cathode. Lower ZZ values improve regulation but require higher bias currents.
Is the 1N6017B suitable for high-temperature environments such as under-hood automotive applications?
Yes, the 1N6017B is rated for operation from –65°C to +200°C junction temperature, making it suitable for under-hood automotive applications where ambient temperatures exceed 125°C. Its DO-35 glass package maintains hermeticity and electrical stability at elevated temperatures, and its Zener voltage tempco remains within specification across this full range.
How is the cathode identified on the 1N6017B DO-35 package?
The cathode of the 1N6017B is marked by a distinct color band (typically black or dark gray) located near one end of the DO-35 glass body. Per Fairchild's marking standard, this band aligns with the third-line marking "7B" and corresponds to the cathode terminal - the unmarked end is the anode. Polarity must be verified before soldering into shunt regulator circuits.
1N6017B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 180 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 39 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
1N6017B FAQ
1.How can I place an order for 1N6017B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6017B 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 1N6017B reliable?
The price and inventory of 1N6017B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6017B is usually 5 days.
3.What payment methods are accepted for 1N6017B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6017B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6017B?
1N6017B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6017B 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 1N6017B?
For technical support, including 1N6017B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6017B requirements.
6.How does Aetrix verify that 1N6017B is sourced from the original manufacturer or authorized distributors?
All 1N6017B 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 1N6017B meets industry standards.
7.What is the process for return or replacement of 1N6017B?
All 1N6017B units undergo pre-shipment inspection (PSI). If there is an issue with 1N6017B, 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 1N6017B part is unused and in its original packaging.
Return procedure for 1N6017B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6017B Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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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
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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