My Inquiry
My Account
Diodes Incorporated 1N5258B-T
- Part No.:
- 1N5258B-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5258B-T.pdf
- Description:
- DIODE ZENER 36V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:8,712
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5258B-T from Diodes Incorporated is a 36 V, ±5% tolerance, 500 mW hermetic glass-encapsulated Zener diode in DO-35 package, designed for precision voltage regulation and reference applications in power supply feedback loops, overvoltage protection circuits, and analog signal conditioning stages.
For engineers reviewing the 1N5258B-T datasheet, 1N5258B-T pinout, 1N5258B-T application, or 1N5258B-T equivalent, key selection criteria include zener voltage accuracy (34.2–37.8 V), low temperature coefficient (+0.093 %/°C), 70 Ω dynamic impedance at 3.4 mA test current, and RoHS-compliant Sn96.5Ag3.5 terminations.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 300 °C/W junction-to-ambient thermal resistance requires lead length control (≤9.5 mm) and ambient derating above 75 °C to sustain rated 500 mW dissipation.
The device exhibits a positive temperature coefficient (+0.093 %/°C) and is specified with 0.1 µA maximum reverse leakage at VR = 27 V. It uses epitaxial construction for high stability and low noise, and features a cathode band polarity marker on the glass body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V nominal, 34.2–37.8 V range at 3.4 mA - defines regulated output voltage tolerance in reference circuits |
| Power Dissipation (PD) | 500 mW - sets maximum continuous steady-state power handling without forced cooling |
| Zener Impedance (ZZT) | 70 Ω at IZT = 3.4 mA - determines output voltage variation under load current changes |
| Temperature Coefficient | +0.093 %/°C - quantifies voltage drift per degree Celsius rise, critical for temperature-stable references |
| Reverse Leakage (IR) | 0.1 µA max at VR = 27 V - ensures minimal error current in high-impedance bias networks |
| Package | DO-35 glass axial - enables manual soldering, high-reliability hermetic sealing, and legacy board compatibility |
Pinout & Package
DO-35 glass axial package with cathode band marking; leads are Sn96.5Ag3.5 plated, solderable per MIL-STD-202 Method 208. Polarity is unambiguous: banded end is cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reverse breakdown reference ground node | Connected to circuit ground or lower-potential rail in shunt regulator configuration |
| Cathode | Reverse breakdown voltage output terminal | Provides regulated 36 V reference when biased above breakdown; marked with band on glass body |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass package | Ensures long-term parameter stability and moisture resistance in harsh environments |
| ±5% VZ tolerance | Enables use in cost-sensitive applications where tight regulation is not required |
| Lead-free, RoHS-compliant finish | Meets EU Directive 2015/863/EU; Sn96.5Ag3.5 termination supports Pb-free reflow and hand-soldering |
| High thermal stability | Operating range of –65 °C to +175 °C allows deployment in automotive under-hood and industrial control systems |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler feedback network. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 36 V threshold to TL431 or optocoupler input. Use Value: Maintains ±1% output regulation across line/load variations due to stable 36 V reference and low ZZT. |
Use Scenario: Protects downstream ICs from transient surges exceeding 36 V in 24 V industrial bus systems. IC Role / Device Role / Timing Role: Clamping element that conducts excess energy to ground when bus voltage exceeds 37.8 V. Use Value: Limits peak voltage to safe levels with <0.1 µA leakage at 27 V, minimizing standby power loss. |
| Instrumentation Reference Source | LED Current Regulation |
Use Scenario: Provides stable bias voltage for op-amp offset trimming and ADC reference scaling in portable test equipment. IC Role / Device Role / Timing Role: Precision DC reference node in analog front-end calibration circuitry. Use Value: Delivers <±0.5% drift over –40 to +85 °C due to +0.093 %/°C TC and hermetic packaging. |
Use Scenario: Sets constant current for high-brightness LED strings in signage and backlighting. IC Role / Device Role / Timing Role: Voltage reference in series-pass transistor current source topology. Use Value: Enables ±3% current accuracy across temperature with 70 Ω ZZT limiting reference variation under load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5258B | Surface-mount SOD-123 package; same 36 V rating, ±5% tolerance, but lower PD = 350 mW | Requires PCB redesign for SMT assembly; unsuitable for through-hole prototyping or high-reliability axial layouts | Select when space-constrained boards and automated assembly are priorities over legacy compatibility |
| 1N4749A | 36 V, ±5%, 1 W power rating, DO-41 package; higher thermal mass and 10 Ω ZZT at 33 mA | Better suited for higher-current regulation; incompatible pin spacing and larger footprint than DO-35 | Choose for applications needing >500 mW dissipation or lower dynamic impedance at higher test currents |
Compared with MMSZ5258B and 1N4749A, the 1N5258B-T offers unique value in legacy through-hole designs requiring hermetic reliability, moderate power handling, and exact DO-35 mechanical fit-without SMT conversion or oversized packaging trade-offs.
Availability
1N5258B-T is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage clamps, and instrumentation reference circuits requiring stable component supply and long-lifecycle support.
Supply support for 1N5258B-T 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The 1N52xxB series belongs to Diodes' legacy Zener diode product line, engineered for general-purpose voltage regulation and reference functions in cost-sensitive, high-reliability industrial and consumer applications.
FAQ
Is the 1N5258B-T still in active production?
No - Diodes Incorporated has officially discontinued the 1N5258B-T and all 1N5221B–1N5267B series. It is marked "OBSOLETE – PART DISCONTINUED" in DS18006 Rev. 19. Aetrix Electronics maintains limited legacy stock for backward-compatible repair and maintenance programs, but no new production is planned.
What is the recommended replacement for the 1N5258B-T?
Diodes Incorporated recommends the MMSZ5258B as the direct functional replacement. It shares identical 36 V zener voltage, ±5% tolerance, and RoHS compliance, but uses an SOD-123 surface-mount package with 350 mW power rating. Board redesign is required due to differing footprint and thermal profile.
Can the 1N5258B-T be used in place of a 1N4749A?
No - while both are 36 V Zeners, the 1N5258B-T (500 mW, DO-35, 70 Ω ZZT) and 1N4749A (1000 mW, DO-41, 10 Ω ZZT) differ significantly in power handling, package dimensions, thermal resistance, and dynamic impedance. Substitution may cause thermal overload or regulation inaccuracy.
What does the "-T" suffix indicate in 1N5258B-T?
The "-T" suffix denotes tape-and-reel packaging: 10,000 units per reel in DO-35 carrier tape. This format supports automated pick-and-place assembly. The electrical and mechanical specifications are identical to the bulk-packaged 1N5258B; only the shipping unit differs.
1N5258B-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- 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:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
1N5258B-T FAQ
1.How can I place an order for 1N5258B-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5258B-T 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-T reliable?
The price and inventory of 1N5258B-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5258B-T is usually 5 days.
3.What payment methods are accepted for 1N5258B-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5258B-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5258B-T?
1N5258B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5258B-T 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-T?
For technical support, including 1N5258B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5258B-T requirements.
6.How does Aetrix verify that 1N5258B-T is sourced from the original manufacturer or authorized distributors?
All 1N5258B-T 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-T meets industry standards.
7.What is the process for return or replacement of 1N5258B-T?
All 1N5258B-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N5258B-T, 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-T part is unused and in its original packaging.
Return procedure for 1N5258B-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5258B-T 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
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
