My Inquiry
My Account
Microchip Technology 1N5276B
- Part No.:
- 1N5276B
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5276B.pdf
- Description:
- DIODE ZENER 150V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,931
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5276B from Microsemi is a 150 V, ±5% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 0.85 mA test current and 10 μA maximum reverse leakage at 120 V, used for precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the 1N5276B datasheet, 1N5276B pinout, 1N5276B application, or 1N5276B equivalent, this part serves as a stable, temperature-compensated voltage reference with +0.110 %/°C tempco, RoHS-compliant plating, and MIL-PRF-19500 screening options when prefixed.
Technical Context
The 1N5276B operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain a stable 150 V across its terminals within ±5% tolerance. Its Zener impedance is 5000 Ω at IZK = 0.25 mA and 1500 Ω at IZT = 0.85 mA, indicating moderate dynamic regulation performance under light-load conditions.
Designed for operation from –65°C to +175°C, it features a hermetically sealed glass DO-35 package with tin-lead or RoHS-compliant matte-tin plating, cathode band marking, and 250 °C/W junction-to-lead thermal resistance at 3/8″ lead length - enabling reliable use in high-reliability industrial and aerospace environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 150 V at 0.85 mA test current - defines primary regulation point for reference design |
| Zener Tolerance | ±5% (B suffix) - ensures voltage accuracy without post-selection or trimming |
| Power Dissipation | 500 mW at 25°C - supports continuous regulation in compact, non-heatsinked layouts |
| Max Reverse Leakage | 10 μA at 120 V - guarantees low standby current in battery-backed or low-power systems |
| Tempco (αVZ) | +0.110 %/°C - enables predictable drift compensation in wide-temperature-range applications |
| Zener Impedance | 1500 Ω at IZT, 5000 Ω at IZK - indicates regulation stiffness under varying load currents |
| Package | DO-35 (DO-204AH) glass axial-leaded - provides mechanical robustness and hermetic sealing |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode indicated by a single black band; leads are tinned copper, solderable per MIL-STD-750 Method 2026; 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 during Zener operation |
| Cathode | Reverse breakdown terminal / regulated output node | Banded end; connected to unregulated input; delivers stable 150 V to load |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N52xxB series | Industry-standard footprint and electrical behavior for drop-in compatibility across legacy designs |
| RoHS-compliant "e3" variant available | Meets environmental compliance requirements without sacrificing glass-package reliability |
| MIL-PRF-19500 screening options | Supports JAN/JANTX/JANTXV/JANS qualification with prefix additions for aerospace and defense programs |
| Low ESD sensitivity (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection in handling and assembly of bare diodes |
| Inherent radiation hardness | Validated per MicroNote 050 - suitable for space-qualified or high-radiation terrestrial applications |
Applications
| High-Voltage Reference Supply | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Generating a stable 150 V reference for ADC biasing or HV op-amp feedback networks in medical imaging power supplies. IC Role / Device Role / Timing Role: Voltage reference element providing precise, temperature-stable DC potential independent of input ripple. Use Value: Enables accurate 16-bit+ analog measurements by minimizing reference drift over –40°C to +85°C operating range. |
Use Scenario: Clamping transient surges on 120 V AC-derived DC rails in industrial motor control gate drivers. IC Role / Device Role / Timing Role: Passive overvoltage limiter absorbing energy above 150 V to protect downstream MOSFETs and optocouplers. Use Value: Prevents destructive latch-up in isolated gate drivers without adding active crowbar circuitry or timing delays. |
| Programmable Power Supply Feedback | Aerospace Voltage Monitor Threshold |
Use Scenario: Setting upper regulation limit in adjustable linear HV supplies using TL431-based feedback loops. IC Role / Device Role / Timing Role: Precision Zener shunt defining error amplifier reference point for closed-loop regulation. Use Value: Maintains ±0.75 V absolute accuracy over full temperature range, reducing calibration burden in field-deployed units. |
Use Scenario: Detecting undervoltage/overvoltage faults in satellite power bus monitoring systems operating at 100–160 V nominal. IC Role / Device Role / Timing Role: Fixed-threshold comparator input reference for radiation-hardened monitoring ASICs. Use Value: Provides deterministic trip point with <10 ppm/°C drift, eliminating software compensation in flight-critical telemetry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5276A | ±10% tolerance (vs. ±5% for 1N5276B), otherwise identical electrical and mechanical specs | Acceptable where cost-sensitive designs tolerate wider voltage spread (e.g., non-critical clamping) | Select 1N5276A only if ±10% regulation window meets system margin requirements |
| MMBZ5276B (SOT-23) | Same 150 V/±5% spec but in surface-mount SOT-23 package; 225 mW power rating vs. 500 mW | Suitable for space-constrained PCBs but not for >225 mW dissipation or high-reliability through-hole mounting | Choose MMBZ5276B only for automated SMT assembly and ≤225 mW continuous power needs |
Compared with 1N5276A and MMBZ5276B, the 1N5276B uniquely combines ±5% tolerance, 500 mW glass-package ruggedness, and MIL-qualified screening readiness - making it the preferred choice for high-stability, high-reliability through-hole voltage references.
Availability
1N5276B is available at Aetrix Electronics and suitable for high-voltage reference supplies, overvoltage clamp protection, and aerospace voltage monitor threshold circuits requiring stable component supply and long-term obsolescence management.
Supply support for 1N5276B 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 specifically for precision voltage regulation in mission-critical systems where long-term stability, hermetic packaging, and extended temperature operation are mandatory.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5276B?
The 1N5276B has a nominal Zener voltage of 150 V with a guaranteed tolerance of ±5%, as indicated by the "B" suffix per JEDEC standard. This tolerance is verified at 0.85 mA test current and 25°C ambient, and applies across the full operating temperature range of –65°C to +175°C per Microsemi's published electrical characteristics table.
Does the 1N5276B require heatsinking in typical applications?
The 1N5276B does not require external heatsinking when operated below 500 mW at 25°C ambient, thanks to its 250 °C/W junction-to-lead thermal resistance at 3/8″ lead length. Derating begins above 25°C per Figure 1 in the datasheet - at 70°C ambient, max power drops to ~350 mW, still sufficient for most reference and clamp roles without added thermal mass.
Can the 1N5276B be used in RoHS-compliant designs?
Yes - the 1N5276B is available in RoHS-compliant form with the "e3" suffix (e.g., 1N5276Be3), featuring annealed matte-tin plating per MIL-STD-750 Method 2026. The base 1N5276B uses traditional tin-lead plating, so designers must specify "e3" explicitly for lead-free compliance.
What is the maximum reverse leakage current for the 1N5276B?
The 1N5276B specifies a maximum reverse leakage current (IR) of 10 μA at VR = 120 V, measured per Note 2 in the Microsemi datasheet. This value is guaranteed across the full temperature range and reflects tight process control for low-power standby operation in battery-backed or energy-sensitive systems.
Is the 1N5276B suitable for military-grade applications?
Yes - the 1N5276B can be ordered with military screening prefixes (e.g., MQ1N5276B for JAN, MV1N5276B for JANTXV) per MIL-PRF-19500, supporting applications requiring extended temperature validation, burn-in, and lot traceability. These variants retain identical electrical specs and DO-35 packaging as the commercial 1N5276B.
1N5276B 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):
- 150 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1500 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 114 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)
1N5276B FAQ
1.How can I place an order for 1N5276B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5276B 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 1N5276B reliable?
The price and inventory of 1N5276B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5276B is usually 5 days.
3.What payment methods are accepted for 1N5276B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5276B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5276B?
1N5276B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5276B 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 1N5276B?
For technical support, including 1N5276B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5276B requirements.
6.How does Aetrix verify that 1N5276B is sourced from the original manufacturer or authorized distributors?
All 1N5276B 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 1N5276B meets industry standards.
7.What is the process for return or replacement of 1N5276B?
All 1N5276B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5276B, 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 1N5276B part is unused and in its original packaging.
Return procedure for 1N5276B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5276B 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
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
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…
