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Microchip Technology 1N5272B
- Part No.:
- 1N5272B
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5272B.pdf
- Description:
- DIODE ZENER 110V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,610
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Product details
Overview
1N5272B from Microsemi is a 500 mW glass axial-lead Zener diode with nominal Zener voltage 110 V, ±5% tolerance (B suffix), 1.1 mA test current, and 750 Ω dynamic impedance at 0.25 mA. It operates from –65°C to +175°C and regulates voltage in low-current reference and protection circuits.
For engineers reviewing the 1N5272B datasheet, 1N5272B pinout, 1N5272B application, or 1N5272B equivalent, this page delivers verified electrical specs, DO-35 package details, thermal derating behavior, temperature coefficient (+0.110 %/°C), and real-world substitution guidance for high-voltage Zener regulation tasks.
Technical Context
The 1N5272B functions as a two-terminal voltage reference device operating in reverse breakdown mode. Its Zener voltage is stabilized by avalanche mechanism above ~6 V, confirmed by its +0.110 %/°C temperature coefficient and 750 Ω Zener impedance at IZK = 0.25 mA.
It is rated for 0.5 W steady-state dissipation at TL < 50°C (3/8″ lead length) or 0.48 W at TA < 25°C on FR4 with defined copper layout. Forward voltage is ≤1.5 V at 200 mA, and it exhibits minimal capacitance per Figure 2 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 110 V - precise reverse breakdown voltage at 1.1 mA test current for stable high-voltage reference |
| Zener Tolerance | ±5% - guaranteed voltage window of 104.5 V to 115.5 V under specified test conditions |
| Zener Impedance | 750 Ω at IZK = 0.25 mA - indicates moderate dynamic resistance affecting regulation accuracy under varying load |
| Power Dissipation | 0.5 W at TL < 50°C - defines maximum continuous power before thermal derating begins |
| Operating Temperature | –65°C to +175°C - supports deployment in aerospace, downhole, and industrial environments |
| Temperature Coefficient | +0.110 %/°C - quantifies voltage drift with temperature; requires compensation in precision references |
| Reverse Current | ≤0.1 μA at VR = 88 V - ensures low leakage below knee voltage, critical for standby power integrity |
Pinout & Package
Package: DO-35 (DO-204AH), hermetically sealed glass axial-leaded case with cathode band marking. Tin-lead or RoHS-compliant matte-tin plating, weight 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse bias applied across anode-to-cathode |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; held at regulated 110 V relative to anode during reverse breakdown operation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with JEDEC 1N52xxB standard for interchangeability and test methodology consistency |
| Radiation-hardened construction | Inherently radiation hard per MicroNote 050 - suitable for space-qualified and nuclear instrumentation applications |
| ESD-insensitive design | Passes MIL-STD-750 Method 1020 - eliminates need for handling precautions in assembly |
| Low capacitance | Typical CJ < 2 pF (per Figure 2) - preserves high-frequency signal integrity in RF bias and snubbing circuits |
| Military screening options | Available with MQ/MX/MV/MSP prefixes + "-1" suffix for JAN/JANTX/JANTXV/JANS levels - enables qualification for defense systems |
Applications
| High-Voltage Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback node in 100–120 V DC-DC converter secondary side. IC Role / Device Role / Timing Role: Zener diode providing fixed 110 V reference to error amplifier input. Use Value: Maintains output regulation within ±1.5% over line/load variations due to tight 110 V ±5% tolerance and low tempco. | Use Scenario: Clamping transient surges on 90 V industrial bus lines. IC Role / Device Role / Timing Role: Two-terminal shunt protector diverting excess energy above 110 V to ground. Use Value: Limits peak voltage to 115.5 V (max) during 100 ns transients, preventing downstream MOSFET gate oxide failure. |
| Temperature-Stable Sensor Bias | Aerospace Voltage Monitor |
Use Scenario: Biasing high-impedance bridge sensor in downhole drilling tool operating at 150°C. IC Role / Device Role / Timing Role: Precision Zener reference establishing excitation voltage for Wheatstone bridge. Use Value: Delivers <±0.5% total drift over –55°C to +150°C due to +0.110 %/°C tempco and wide operating range. | Use Scenario: Monitoring 100 V primary bus in satellite power distribution unit. IC Role / Device Role / Timing Role: Radiation-hardened Zener used in comparator threshold network. Use Value: Ensures reliable fault detection across mission lifetime without parametric shift from total ionizing dose exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5272A | Same 110 V nominal voltage but ±10% tolerance (vs. ±5% for 1N5272B) | Acceptable where looser voltage accuracy suffices; higher IR spec (100 μA vs. 0.1 μA) | Select 1N5272A only when cost sensitivity outweighs regulation precision and leakage constraints |
| MMBZ5272B | Surface-mount MELF (DO-213AA) package; identical 110 V ±5%, 750 Ω ZZK, +0.110 %/°C | Requires PCB redesign for SMT placement; same electrical performance in compact footprint | Choose MMBZ5272B for automated assembly or space-constrained layouts where DO-35 axial leads are impractical |
Compared with 1N5272A and MMBZ5272B, the 1N5272B offers the tightest voltage tolerance in through-hole form, lowest leakage, and proven reliability in high-temp/military deployments-making it optimal for precision analog and harsh-environment applications where axial mounting is preferred.
Availability
1N5272B is available at Aetrix Electronics and suitable for high-voltage reference design, overvoltage clamping, and aerospace power monitoring requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N5272B 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, radiation-hardened, and high-voltage analog components for aerospace, defense, and industrial markets.
The 1N52xxB series was designed to deliver JEDEC-standardized, high-stability Zener regulation in ruggedized DO-35 packaging for mission-critical voltage reference and protection functions.
FAQ
What is the Zener voltage tolerance of the 1N5272B?
The 1N5272B has a nominal Zener voltage of 110 V with a guaranteed tolerance of ±5%, meaning its actual breakdown voltage falls between 104.5 V and 115.5 V when tested at 1.1 mA. This tolerance is defined by the "B" suffix per Microsemi's datasheet and applies under standard 25°C test conditions with proper thermal stabilization.
What is the maximum power dissipation for the 1N5272B at room temperature?
The 1N5272B is rated for 0.5 W steady-state power dissipation at a lead temperature (TL) below 50°C with 3/8″ (10 mm) lead length from the body. When mounted on an FR4 PCB with specified copper area, its derated power is 0.48 W at ambient temperature (TA) below 25°C, per Figure 1 of the official Microsemi datasheet.
Does the 1N5272B have a documented temperature coefficient?
Yes, the 1N5272B has a documented positive temperature coefficient of +0.110 %/°C, measured between 25°C and 125°C at its rated test current. This value reflects the average voltage drift per degree Celsius and is critical for predicting regulation stability across operating temperature ranges in precision applications.
Is the 1N5272B suitable for high-reliability aerospace use?
Yes, the 1N5272B is inherently radiation-hardened per MicroNote 050 and supports military screening options (e.g., JANTXV with MV prefix + "-1" suffix). Its DO-35 glass package, –65°C to +175°C operating range, and ESD insensitivity make it qualified for aerospace voltage monitoring and power system protection.
How does the 1N5272B compare to the surface-mount MMBZ5272B?
The 1N5272B and MMBZ5272B share identical electrical specifications-110 V ±5%, 750 Ω ZZK, +0.110 %/°C tempco-but differ in package: DO-35 axial-leaded versus DO-213AA MELF. The 1N5272B supports through-hole assembly and legacy designs, while MMBZ5272B enables automated SMT placement in space-constrained layouts.
1N5272B 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):
- 110 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 750 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 84 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)
1N5272B FAQ
1.How can I place an order for 1N5272B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5272B 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 1N5272B reliable?
The price and inventory of 1N5272B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5272B is usually 5 days.
3.What payment methods are accepted for 1N5272B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5272B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5272B?
1N5272B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5272B 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 1N5272B?
For technical support, including 1N5272B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5272B requirements.
6.How does Aetrix verify that 1N5272B is sourced from the original manufacturer or authorized distributors?
All 1N5272B 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 1N5272B meets industry standards.
7.What is the process for return or replacement of 1N5272B?
All 1N5272B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5272B, 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 1N5272B part is unused and in its original packaging.
Return procedure for 1N5272B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5272B 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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