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Microchip Technology 1N5234B
- Part No.:
- 1N5234B
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5234B.pdf
- Description:
- DIODE ZENER 6.2V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,188
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Product details
Overview
1N5234B from Microsemi is a 6.2 V, ±5% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 20 mA test current and 7 Ω dynamic impedance at IZT, used for precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the 1N5234B datasheet, 1N5234B pinout, 1N5234B application, or 1N5234B equivalent, key selection factors include its 6.2 V nominal Zener voltage, 5% tolerance, 7 Ω Zener impedance at 20 mA, -65°C to +175°C operating temperature range, and DO-35 mechanical compatibility with axial-leaded PCB layouts.
Technical Context
The 1N5234B operates as a reverse-biased silicon Zener diode with sharp breakdown knee, specified at 20 mA test current (IZT) and characterized for stable regulation across -65°C to +175°C ambient. Its 7 Ω dynamic impedance (ZZT) at IZT ensures minimal output voltage variation under load changes.
Thermal resistance is 250°C/W junction-to-lead (3/8" lead length) and 310°C/W junction-to-ambient on FR4 board; forward voltage is ≤1.5 V at 200 mA. Cathode polarity is marked by a band; operation requires cathode-positive bias relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 6.2 V - precise regulation point at 20 mA, enabling stable 6.2 V reference generation |
| Zener Tolerance | ±5% - guarantees VZ between 5.89 V and 6.51 V, suitable for mid-precision analog references |
| Power Dissipation | 500 mW at 25°C - supports continuous regulation in compact axial-leaded designs without forced cooling |
| Zener Impedance (ZZT) | 7 Ω at IZT = 20 mA - low dynamic resistance minimizes output ripple and improves load regulation |
| Operating Temperature | -65°C to +175°C - qualified for aerospace, industrial, and downhole applications requiring extreme thermal resilience |
| Reverse Current (IR) | 5 μA max @ VR = 4.8 V - ensures low leakage below breakdown, critical for battery-powered standby circuits |
| Temp. Coefficient (αVZ) | +0.045 %/°C - predictable positive drift enables compensation in temperature-sensitive references |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with tin-lead or RoHS-compliant matte-tin plating; cathode identified by single black band; weight 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-bias voltage applied between cathode and this terminal |
| Cathode | Zener regulation output | Banded end; held at regulated 6.2 V above anode when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered DO-35 construction | Ensures mechanical and soldering compatibility with legacy axial-leaded assembly processes and tooling |
| 2% max Zener impedance variation at IZK = 0.25 mA | Guarantees stable low-current regulation for power-off monitoring and wake-up circuits |
| Radiation-hardened per MicroNote 050 | Validated for total ionizing dose (TID) resilience in space and nuclear environments |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for handling precautions during manual assembly or field repair |
| Minimal capacitance (~2 pF typical) | Preserves high-frequency signal integrity in RF bias networks and fast transient clamping |
Applications
| Low-Power Voltage Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 6.2 V bias for op-amp input stages and ADC reference dividers in portable instrumentation. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage regulator, sinking excess current to maintain fixed potential. Use Value: Delivers 6.2 V ±5% accuracy with 7 Ω dynamic impedance, reducing reference drift versus resistor-divider alternatives. | Use Scenario: Protecting microcontroller I/O pins from ESD transients and supply rail overshoot in automotive body control modules. IC Role / Device Role / Timing Role: Reverse-biased clamping device diverting surge current above 6.2 V to ground. Use Value: Responds within nanoseconds with <5 μA leakage at 4.8 V, limiting voltage excursion without loading normal operation. |
| Temperature-Compensated Bias | Legacy Power Supply Regulation |
Use Scenario: Generating compensated bias for transistor amplifiers in wide-temperature-range RF front-ends. IC Role / Device Role / Timing Role: Zener element paired with forward-biased diodes to cancel thermal drift. Use Value: +0.045 %/°C coefficient enables predictable cancellation when combined with -2 mV/°C silicon junctions. | Use Scenario: Regulating auxiliary 6.2 V rails in industrial PLC power supplies where cost and reliability outweigh efficiency demands. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant output despite transformer ripple and load variation. Use Value: Handles 500 mW dissipation with 250°C/W thermal resistance, supporting continuous operation without heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4735A | 6.2 V, ±5%, 1 W rating, DO-41 package, 5 Ω ZZT at 31 mA | Higher power handling but larger footprint; less suitable for space-constrained axial layouts | Select 1N4735A only if >500 mW dissipation or higher IZT stability is required |
| BZX55C6V2 | 6.2 V, ±5%, 500 mW, DO-35 package, 10 Ω ZZT at 5 mA | Higher dynamic impedance at lower test current; tighter thermal coefficient spread (±0.05%/°C) | Prefer BZX55C6V2 when lower-cost commercial screening suffices and 10 Ω impedance is acceptable |
Compared with 1N4735A and BZX55C6V2, the 1N5234B offers optimal balance of DO-35 form factor, 7 Ω low-impedance regulation at 20 mA, and radiation hardness-making it preferred for aerospace, defense, and high-reliability industrial use cases where JEDEC registration and MIL-qualified variants are available.
Availability
1N5234B is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage clamp, and temperature-compensated bias applications requiring stable component supply across aerospace, industrial control, and medical electronics programs.
Supply support for 1N5234B 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N52xxB series belongs to Microsemi's legacy DO-35 Zener diode product line, engineered for precision voltage regulation in mission-critical systems where thermal stability, long-term parameter consistency, and MIL-PRF-19500 screening options are essential.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5234B?
The 1N5234B has a nominal Zener voltage of 6.2 V with a guaranteed tolerance of ±5%, meaning its actual breakdown voltage falls between 5.89 V and 6.51 V when tested at 20 mA (IZT) and 25°C. This tolerance is confirmed by the "B" suffix per JEDEC standard and applies across the full -65°C to +175°C operating range.
What package type and mounting configuration does the 1N5234B use?
The 1N5234B uses a DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with tin-lead or RoHS-compliant matte-tin plating. It mounts via two axial leads, with cathode identified by a single black band; polarity must be observed-cathode is the banded end and must be held positive relative to the anode for Zener regulation.
What is the maximum power dissipation and thermal resistance of the 1N5234B?
The 1N5234B is rated for 500 mW power dissipation at 25°C ambient. Its thermal resistance is 250°C/W junction-to-lead (measured at 3/8" lead length from body) and 310°C/W junction-to-ambient on FR4 board with specified copper layout. Derating is required above 25°C, per Figure 1 in the official Microsemi datasheet.
How does the 1N5234B perform in high-temperature or radiation-intensive environments?
The 1N5234B is qualified for operation from -65°C to +175°C and is inherently radiation-hardened per MicroNote 050, making it suitable for downhole, aerospace, and nuclear applications. Its parameters-including VZ, IR, and ZZT-are specified across this full range, and optional MIL-PRF-19500 screening (e.g., JANTXV) is available with prefix modifiers.
What are the key electrical characteristics that distinguish the 1N5234B from generic 6.2 V Zeners?
The 1N5234B distinguishes itself with 7 Ω dynamic impedance (ZZT) at 20 mA, +0.045 %/°C temperature coefficient, 5 μA max reverse leakage at 4.8 V, and JEDEC-registered DO-35 mechanical compliance. These values-verified in Microsemi's official characterization-are tighter and more consistently specified than commodity Zeners, especially under thermal stress and radiation exposure.
1N5234B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5234B FAQ
1.How can I place an order for 1N5234B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5234B 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 1N5234B reliable?
The price and inventory of 1N5234B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5234B is usually 5 days.
3.What payment methods are accepted for 1N5234B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5234B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5234B?
1N5234B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5234B 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 1N5234B?
For technical support, including 1N5234B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5234B requirements.
6.How does Aetrix verify that 1N5234B is sourced from the original manufacturer or authorized distributors?
All 1N5234B 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 1N5234B meets industry standards.
7.What is the process for return or replacement of 1N5234B?
All 1N5234B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5234B, 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 1N5234B part is unused and in its original packaging.
Return procedure for 1N5234B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5234B 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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