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onsemi 1N5258B
- Part No.:
- 1N5258B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5258B.pdf
- Description:
- DIODE ZENER 36V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:9,928
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Product details
Overview
1N5258B from ON Semiconductor is a 36 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 25°C, with 70 Ω dynamic impedance at 10 mA test current and 0.25 μA maximum reverse leakage at 28.8 V. It provides precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the 1N5258B datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, cathode identification, and direct alternatives for stable voltage reference design.
Technical Context
The 1N5258B operates as a silicon planar Zener diode with sharp reverse breakdown at nominal 36 V, designed for stable DC voltage clamping and reference generation in linear power supplies and sensor bias networks. Its 5% tolerance and low temperature coefficient (0.093 %/°C) support repeatable performance across industrial temperature ranges.
It features hermetically sealed DO-35 glass packaging with axial leads, cathode identified by a single color band, and is rated for junction temperatures from –65°C to +200°C. Thermal derating begins above 50°C at 4.0 mW/°C, limiting usable power in high-ambient environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 34.2 V min / 36 V typ / 37.8 V max @ IZ = 10 mA - defines regulated output range under standard test conditions |
| Dynamic Impedance (ZZ) | 70 Ω @ IZ = 10 mA - determines output voltage stability under load variation |
| Reverse Leakage (IR) | 0.25 μA max @ VR = 28.8 V - ensures minimal quiescent current in standby regulation |
| Power Dissipation (PD) | 500 mW @ TA = 25°C - sets maximum continuous DC power handling at room ambient |
| Temperature Coefficient (TC) | +0.093 %/°C - quantifies VZ drift per degree Celsius for thermal error budgeting |
| Forward Voltage (VF) | 1.2 V max @ IF = 200 mA - specifies forward conduction drop when used in series protection |
Pinout & Package
DO-35 glass axial-leaded package with cathode identified by a single color band on the body. Leads are tinned copper-clad steel, suitable for wave or hand soldering at ≤230°C for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal during forward conduction; connected to lower potential in Zener mode | Accepts current flow toward cathode in regulation; must be held ≤ (VZ − Vin) below cathode to maintain breakdown |
| Cathode | Negative terminal during forward conduction; higher-potential terminal in Zener operation | Connected to regulated output node; marked by color band; reverse-biased to achieve voltage clamping |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-production trimming in cost-sensitive designs |
| Hermetic DO-35 glass package | Provides long-term reliability and moisture resistance in unsealed PCB environments |
| Low temperature coefficient (+0.093 %/°C) | Minimizes voltage drift over –65°C to +150°C operating range for industrial-grade references |
| 0.25 μA max reverse leakage at 80% VZ | Reduces standby power loss in battery-backed or energy-harvesting circuits |
Applications
| Industrial Sensor Biasing | Linear Power Supply Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in PLC analog input modules. IC Role / Device Role / Timing Role: Precision voltage reference source establishing known current through RTD element. Use Value: 36 V rating allows use with 24 V systems via simple resistor divider; ±5% tolerance meets Class B sensor accuracy requirements. | Use Scenario: Setting regulated output voltage in discrete 78xx-style linear regulator feedback networks. IC Role / Device Role / Timing Role: Zener shunt reference defining error amplifier setpoint in adjustable LDO circuits. Use Value: 70 Ω ZZ ensures <10 mV output shift under 1 mA load change, supporting tight regulation specs. |
| Overvoltage Clamp Protection | Microcontroller I/O Protection |
Use Scenario: Safeguarding analog front-end inputs against transient surges in motor drive control boards. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to 37.8 V peak during ESD or inductive kick events. Use Value: 500 mW rating sustains 100 ms surge at 100 mA without degradation; DO-35 form factor fits compact layout. | Use Scenario: Protecting 3.3 V or 5 V GPIO pins from accidental 12–24 V miswiring in industrial HMI panels. IC Role / Device Role / Timing Role: Reverse-biased Zener clamping excess voltage to safe level before reaching MCU ESD structures. Use Value: 0.25 μA leakage avoids measurable pull-down on high-impedance inputs; cathode-band marking simplifies orientation verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | 36 V nominal, ±5%, 1 W power rating, DO-41 package | Higher power handling enables sustained clamping in higher-energy transients | Select when >500 mW surge energy must be absorbed without derating |
| BZX55-C36 | 36 V nominal, ±5%, 500 mW, DO-35 package, tighter VZ distribution (±2% option available) | Offers tighter tolerance variants and broader manufacturer availability | Select when tighter initial tolerance or multi-source supply chain is required |
Compared with 1N5258B, 1N4749A supports higher continuous power but requires larger board space; BZX55-C36 matches footprint and power rating while offering optional ±2% tolerance for enhanced reference accuracy.
Availability
1N5258B is available at Aetrix Electronics and suitable for industrial sensor biasing, linear power supply reference, and overvoltage clamp protection requiring stable component supply, consistent DO-35 packaging, and traceable lot-level compliance.
Supply support for 1N5258B 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 power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, medical, and IoT applications.
The 1N52xxB series is part of ON Semiconductor's legacy Zener diode portfolio, engineered for general-purpose voltage regulation and clamping in cost-sensitive, space-constrained designs where DO-35 reliability and ±5% tolerance meet system requirements.
FAQ
What is the nominal Zener voltage of the 1N5258B and how is it tested?
The 1N5258B has a nominal Zener voltage of 36 V, with a guaranteed range of 34.2 V to 37.8 V at 10 mA test current (IZ). This value is measured under thermal equilibrium conditions at lead temperature of 30°C ±1°C, using 3/8″ lead length per ON Semiconductor specification. The 1N5258B datasheet confirms this parameter in its Electrical Characteristics table.
Does the 1N5258B have polarity markings, and how is the cathode identified?
Yes, the 1N5258B uses a single color band on the glass body to denote the cathode terminal. This marking aligns with JEDEC DO-35 standard practice and is visible on both ends of the axial package. The anode is the unmarked end. Correct orientation is essential for proper Zener operation, and the 1N5258B must be reverse-biased to function as a voltage regulator.
What is the maximum allowable power dissipation for the 1N5258B at 70°C ambient temperature?
At 70°C ambient, the 1N5258B must be derated from its 500 mW rating at 25°C. Derating begins at 50°C at 4.0 mW/°C, so at 70°C the allowable power is 500 mW − (20°C × 4.0 mW/°C) = 420 mW. This limit ensures junction temperature remains within the –65°C to +200°C operating range specified for the 1N5258B.
Can the 1N5258B be used in place of a 1N4749A in a circuit?
The 1N5258B and 1N4749A share the same 36 V nominal Zener voltage and ±5% tolerance, but differ in package (DO-35 vs. DO-41) and power rating (500 mW vs. 1 W). Substitution is possible only if mechanical fit, thermal margin, and surge energy requirements permit. The 1N5258B cannot replace 1N4749A in 1 W continuous applications without risk of thermal failure.
What is the reverse leakage current specification for the 1N5258B, and at what voltage is it measured?
The 1N5258B specifies a maximum reverse leakage current (IR) of 0.25 μA, measured at VR = 28.8 V - which is 80% of its nominal 36 V Zener voltage. This low leakage supports energy-efficient operation in always-on monitoring circuits and ensures minimal loading on high-impedance reference nodes in precision analog designs.
1N5258B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 27 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
1N5258B FAQ
1.How can I place an order for 1N5258B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5258B 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 1N5258B reliable?
The price and inventory of 1N5258B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5258B is usually 5 days.
3.What payment methods are accepted for 1N5258B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5258B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5258B?
1N5258B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5258B 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 1N5258B?
For technical support, including 1N5258B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5258B requirements.
6.How does Aetrix verify that 1N5258B is sourced from the original manufacturer or authorized distributors?
All 1N5258B 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 1N5258B meets industry standards.
7.What is the process for return or replacement of 1N5258B?
All 1N5258B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5258B, 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 1N5258B part is unused and in its original packaging.
Return procedure for 1N5258B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5258B Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZT52C15-7-F
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BZX84C3V3LT1G
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MMSZ5245BS-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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