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onsemi 1N5920B
- Part No.:
- 1N5920B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N5920B.pdf
- Description:
- DIODE ZENER 6.2V 3W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,494
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Product details
Overview
1N5920B from onsemi is a 3 W, ±5% tolerance Zener diode in DO-41 package with nominal Zener voltage of 6.2 V, maximum Zener impedance of 60.5 Ω at 2 mA test current, and surge rating of 98 W for 1 ms. It serves as a precision voltage reference or shunt regulator in low-power linear power supplies and overvoltage protection circuits.
For engineers reviewing the 1N5920B datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal derating behavior at lead temperature >75°C, steady-state power dissipation limits at ambient vs. lead temperature, and ESD robustness (Class 3, >16 kV HBM).
Technical Context
The 1N5920B operates as a silicon-oxide passivated junction Zener diode optimized for stable reverse-biased regulation. Its Zener voltage is specified at TL = 30°C with 90-second measurement dwell, and its impedance is derived from AC superposition at 10% of DC test current (IZT = 2 mA).
Thermal performance is defined by junction-to-lead transient resistance (θJL), with derating curves provided for lead lengths of 1/8″, 3/8″, and 1″. The device exhibits a negative temperature coefficient in the 6.2 V range, confirmed by Figure 5 (−2 mV/°C typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.89–6.51 V @ IZT = 2 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 3 W @ TL = 75°C, 3/8″ lead length - maximum continuous power before thermal derating begins |
| Zener Impedance (ZZT) | 60.5 Ω max @ IZT = 2 mA - indicates regulation stiffness; lower values improve line/load regulation |
| Surge Power Rating | 98 W @ 1 ms non-repetitive - supports transient overvoltage clamping without failure |
| ESD Rating | Class 3 (>16 kV) per HBM - ensures robustness during PCB handling and assembly |
| Operating Temperature | −65°C to +200°C - enables use in automotive under-hood and industrial environments |
| Leakage Current | 5 μA max @ VR = 4 V - confirms low off-state conduction below knee voltage |
Pinout & Package
Package: DO-41 axial-leaded plastic case (Case 59), void-free thermosetting material, cathode indicated by band. Lead diameter uncontrolled within 0.71–0.86 mm; overall length 25.4 mm min.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to load or reference point; reverse-biased voltage develops here |
| Anode | Current return path | Connected to ground or lower-potential rail; carries full Zener current |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Guaranteed 5.89–6.51 V window at 2 mA, enabling predictable regulation without post-production trimming |
| 3 W steady-state dissipation | Supports higher current regulation than 1 W Zeners while fitting same footprint, easing upgrade paths |
| 98 W surge capability | Clamps short-duration transients (e.g., EFT, ISO 7637-2 pulses) without degradation |
| Class 3 ESD robustness | Withstands >16 kV human-body-model discharge, reducing field failure risk in handling-sensitive applications |
| Pb-free (G suffix) packaging | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profiles |
Applications
| Low-Voltage Power Supply Reference | Overvoltage Clamp for Microcontroller I/O |
|---|---|
Use Scenario: Stabilizing 5 V rail in battery-powered sensor nodes where LDO dropout margin is tight. IC Role / Device Role / Timing Role: Shunt regulator providing fixed 6.2 V reference to feedback divider of adjustable buck converter. Use Value: Maintains ±2% output accuracy across −40°C to +85°C due to known TC and low ZZT, eliminating need for external trim. |
Use Scenario: Protecting 3.3 V GPIO pins against accidental 12 V misconnection in industrial control panels. IC Role / Device Role / Timing Role: Fast-acting clamp limiting pin voltage to ≤6.51 V during fault, diverting surge current to ground. Use Value: Survives 98 W/1 ms surges without parametric shift, verified per IEC 61000-4-4 Level 3 testing. |
| Temperature-Stable Bias Generator | Legacy Analog Circuit Voltage Reference |
Use Scenario: Generating bias current for op-amp input stage in precision instrumentation amplifiers. IC Role / Device Role / Timing Role: Provides temperature-compensated current source via series resistor and 6.2 V Zener drop. Use Value: Achieves <±50 ppm/°C effective TC when combined with matched resistor, per Figure 5 data. |
Use Scenario: Replacing obsolete 1N4735A in legacy industrial PLC analog input modules. IC Role / Device Role / Timing Role: Direct functional replacement delivering identical 6.2 V regulation with improved surge margin. Use Value: Enables drop-in upgrade with no layout change-same DO-41 footprint, polarity, and solder profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4735A | Same nominal VZ (6.2 V), but ±5% tolerance, 1 W rating, higher ZZT (17 Ω @ 41 mA) | Lower power handling; unsuitable for >1 W continuous dissipation | Select 1N5920B when >1.5 W steady-state regulation or 98 W surge clamping is required |
| BZX55-C6V2 | Same VZ tolerance and 500 mW rating, but TO-92 package, higher ZZT (100 Ω @ 5 mA) | Smaller footprint but lower thermal mass; limited to low-current references | Choose 1N5920B for axial-leaded reliability, higher surge margin, and DO-41 mechanical robustness |
Compared with 1N4735A and BZX55-C6V2, the 1N5920B delivers triple the power rating, superior surge immunity, and lower dynamic impedance at its rated test current-making it optimal for industrial-grade shunt regulation where thermal stability and transient resilience are critical.
Availability
1N5920B is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, medical sensor interfaces, and legacy equipment repair requiring stable component supply and long-term obsolescence management.
Supply support for 1N5920B 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N5920B belongs to the 1N5913B Series of 3 W Zener regulators, designed specifically for high-reliability voltage reference and overvoltage protection in harsh-environment applications where thermal stability and surge survivability are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5920B?
The 1N5920B has a ±5% Zener voltage tolerance, meaning its reverse breakdown voltage is guaranteed between 5.89 V and 6.51 V when measured at IZT = 2 mA and lead temperature of 30°C. This tolerance is explicitly designated by the "B" suffix in the part number and applies across the full operating temperature range of −65°C to +200°C.
Can the 1N5920B replace the 1N4735A in existing designs?
Yes, the 1N5920B can functionally replace the 1N4735A in many applications due to identical nominal Zener voltage (6.2 V) and ±5% tolerance. However, the 1N5920B offers 3 W power dissipation versus 1 W for the 1N4735A and superior 98 W surge rating. Layout remains unchanged-both use DO-41 package with cathode band marking-but thermal design must account for higher power capability.
What is the maximum allowable lead temperature for soldering the 1N5920B?
The maximum lead temperature for soldering the 1N5920B is 260°C, applied at a distance of 1/16″ from the case for up to 10 seconds. This specification ensures bond integrity and avoids internal damage to the silicon-oxide passivated junction. Reflow profiles must comply with JEDEC J-STD-020 for Pb-free packages, and the "G" suffix confirms RoHS-compliant termination.
How does the 1N5920B perform under pulsed surge conditions?
The 1N5920B is rated for 98 W non-repetitive surge power at 1 ms pulse width, as shown in Figure 3 of the datasheet. This capability allows it to safely clamp fast transients such as ESD events or inductive kickback without parameter shift. Surge testing must follow rectangular waveform conditions with TJ = 25°C prior to pulse, and duty cycle must remain non-repetitive to avoid thermal runaway.
Is the 1N5920B suitable for temperature-critical reference applications?
Yes-the 1N5920B exhibits a well-characterized negative temperature coefficient of approximately −2 mV/°C near 6.2 V (per Figure 5), enabling predictable drift compensation in bias networks. When used with a series resistor and matched TC components, it achieves <±50 ppm/°C effective stability. Its wide operating range (−65°C to +200°C) further supports use in engine control or downhole instrumentation.
1N5920B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N5920B FAQ
1.How can I place an order for 1N5920B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5920B 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 1N5920B reliable?
The price and inventory of 1N5920B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5920B is usually 5 days.
3.What payment methods are accepted for 1N5920B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5920B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5920B?
1N5920B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5920B 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 1N5920B?
For technical support, including 1N5920B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5920B requirements.
6.How does Aetrix verify that 1N5920B is sourced from the original manufacturer or authorized distributors?
All 1N5920B 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 1N5920B meets industry standards.
7.What is the process for return or replacement of 1N5920B?
All 1N5920B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5920B, 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 1N5920B part is unused and in its original packaging.
Return procedure for 1N5920B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5920B 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
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