My Inquiry
My Account
Microchip Technology 1N5274B
- Part No.:
- 1N5274B
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5274B.pdf
- Description:
- DIODE ZENER 130V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:7,656
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5274B from Microsemi is a 500 mW glass axial-lead Zener diode with nominal Zener voltage of 130 V, ±5% tolerance (B suffix), 0.95 mA test current, and 4500 Ω maximum Zener impedance at 0.25 mA. It operates from –65°C to +175°C and regulates voltage in low-current reference and protection circuits for industrial power supplies and sensor signal conditioning.
For engineers reviewing the 1N5274B datasheet, 1N5274B pinout, 1N5274B application, or 1N5274B equivalent, key selection criteria include its 130 V regulation level, DO-35 package thermal resistance (310°C/W on FR4), temperature coefficient (+0.110 %/°C), and suitability for high-voltage biasing where stable reverse breakdown is required under wide ambient conditions.
Technical Context
This discrete Zener diode functions exclusively in reverse-bias breakdown mode, with cathode band marking polarity. Its regulation behavior is defined at IZT = 0.95 mA and characterized across –65°C to +175°C, exhibiting a positive temperature coefficient of +0.110 %/°C above 100 V.
The device uses a hermetically sealed DO-35 (DO-204AH) glass package with tin-lead or RoHS-compliant matte-tin plating. Thermal performance is specified for 3/8″ (10 mm) lead length from body (250°C/W junction-to-lead) and FR4 PCB mounting (310°C/W junction-to-ambient with 4 mm² copper pads).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 130 V - precise reverse breakdown voltage at 0.95 mA, enabling high-voltage reference generation |
| Zener Tolerance | ±5% (B suffix) - ensures predictable regulation window of 123.5–136.5 V under production conditions |
| Power Dissipation | 500 mW at 25°C - limits continuous reverse power handling; derates linearly above 50°C lead temperature |
| Zener Impedance | 4500 Ω max at IZK = 0.25 mA - indicates steepness of breakdown knee; impacts regulation stability under light-load transients |
| Temperature Coefficient | +0.110 %/°C - quantifies voltage drift with temperature; critical for precision bias networks above 100 V |
| Operating Temperature | –65°C to +175°C - supports deployment in aerospace, downhole, and military environments without derating |
| Reverse Current | ≤0.1 μA at VR = 104 V - defines leakage floor before breakdown; enables ultra-low standby current in sensing circuits |
Pinout & Package
Hermetically sealed DO-35 (DO-204AH) glass axial-leaded package with cathode indicated by a single black band. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026. Polarity must be observed: banded end is cathode and must be held positive relative to anode for Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for reverse-bias connection | Connected to lower-potential side of circuit; forms return path during Zener conduction |
| Cathode (banded end) | Zener breakdown terminal | Connected to higher-potential side; voltage regulation occurs between cathode and anode when reverse biased ≥130 V |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N52xxB series | Guarantees full six-parameter electrical specification compliance (VZ, IR, ZZT, ZZK, αVZ, VF) per JEDEC standard |
| Hermetic DO-35 glass construction | Provides intrinsic radiation hardness (per MicroNote 050) and immunity to moisture-induced parameter shift |
| Nonsensitive to ESD | Rated per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling and assembly |
| Minimal capacitance | Typical CJ < 2 pF (per Figure 2) - preserves high-frequency signal integrity in RF bias and pulse-clamp applications |
| Flexible axial-lead mounting | Enables through-hole insertion, wire-wrap, or point-to-point wiring without PCB footprint constraints |
Applications
| High-Voltage Reference Supply | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Generating a stable 130 V reference for analog front-end calibration in industrial data acquisition systems. IC Role / Device Role / Timing Role: Zener diode provides passive, temperature-compensated DC reference voltage independent of load current variation. Use Value: Delivers ±5% accuracy over –65°C to +175°C with <0.1 μA leakage below 104 V, minimizing error contribution in precision ADC bias networks. | Use Scenario: Clamping transient spikes on 120 V AC-derived DC rails in motor drive control boards. IC Role / Device Role / Timing Role: Acts as shunt overvoltage protector by conducting above 130 V, diverting surge energy to ground. Use Value: Withstands 500 mW peak dissipation and operates up to +175°C, enabling reliable clamping without thermal runaway in enclosed enclosures. |
| Sensor Excitation Bias | High-Temperature Power Supply Regulation |
Use Scenario: Supplying excitation voltage to piezoresistive pressure sensors in oil & gas downhole tools. IC Role / Device Role / Timing Role: Provides fixed 130 V bias to sensor bridge while rejecting supply ripple via Zener impedance. Use Value: Hermetic DO-35 package and +0.110 %/°C αVZ enable predictable output drift across extreme temperature gradients encountered at depth. | Use Scenario: Regulating auxiliary 130 V rail in avionics power converters operating in extended temperature environments. IC Role / Device Role / Timing Role: Functions as primary shunt regulator in unregulated high-voltage DC-DC feedback loop. Use Value: 310°C/W thermal resistance on FR4 allows sustained operation at 500 mW with minimal board-level heatsinking, reducing system size and weight. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5274C | Same 130 V nominal voltage but ±2% tolerance (C suffix) and tighter 0.95 mA IZT spec | Used where higher initial accuracy is required, e.g., metrology-grade references | Select 1N5274C when ±2% initial tolerance justifies cost premium over 1N5274B's ±5% |
| 1N5274D | Same 130 V nominal voltage but ±1% tolerance (D suffix); otherwise identical electrical and thermal specs | Deployed in military screening contexts requiring highest-grade voltage references (e.g., JANS-level programs) | Choose 1N5274D only if 1% tolerance is mandated by system-level accuracy budget or qualification requirements |
Compared with 1N5274C and 1N5274D, the 1N5274B offers optimal balance of cost, availability, and ±5% regulation accuracy for industrial and commercial high-voltage reference designs where tighter tolerances are unnecessary.
Availability
1N5274B is available at Aetrix Electronics and suitable for high-voltage reference supply, overvoltage protection clamp, and sensor excitation bias applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N5274B 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 was designed specifically for high-stability, high-temperature Zener regulation in mission-critical systems where hermetic packaging, wide operating range, and JEDEC-verified parametric consistency are mandatory.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5274B?
The 1N5274B has a nominal Zener voltage of 130 V with a guaranteed tolerance of ±5%, as indicated by the "B" suffix. This means its actual breakdown voltage falls within 123.5 V to 136.5 V when tested at 0.95 mA under standard conditions. The 1N5274B meets full six-parameter JEDEC specifications, including this voltage limit, making it suitable for applications demanding verified regulation accuracy.
What package type and mounting configuration does the 1N5274B use?
The 1N5274B uses a hermetically sealed DO-35 (DO-204AH) glass axial-leaded package with cathode identified by a single black band. It is designed for through-hole mounting with 3/8″ (10 mm) minimum lead length from the body. The 1N5274B's leads are tin-lead or RoHS-compliant matte-tin plated, ensuring compatibility with standard soldering processes per MIL-STD-750 Method 2026.
What is the maximum power dissipation and thermal resistance of the 1N5274B?
The 1N5274B has a maximum power dissipation of 500 mW at 25°C, derating linearly above 50°C lead temperature. Its thermal resistance is 250°C/W junction-to-lead (at 3/8″ lead length) and 310°C/W junction-to-ambient when mounted on FR4 with specified copper pad geometry. These values directly define safe operating area limits for the 1N5274B in both lead-mounted and PCB-mounted configurations.
How does the temperature coefficient affect the 1N5274B's regulation voltage?
The 1N5274B has a temperature coefficient of +0.110 %/°C, meaning its Zener voltage increases by approximately 0.143 V per 10°C rise above 25°C. This positive drift is typical for Zeners above 100 V and must be factored into system-level accuracy budgets. The 1N5274B's coefficient is fully characterized from –65°C to +175°C, supporting predictable performance in extreme environments.
Is the 1N5274B suitable for high-reliability or radiation-exposed applications?
Yes - the 1N5274B features hermetic DO-35 glass packaging and is inherently radiation-hard per MicroNote 050. It is also nonsensitive to ESD per MIL-STD-750 Method 1020. These characteristics make the 1N5274B appropriate for aerospace, downhole, and military applications where long-term parameter stability under radiation exposure and electrostatic stress is required.
1N5274B 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):
- 130 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1100 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 99 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)
1N5274B FAQ
1.How can I place an order for 1N5274B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5274B 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 1N5274B reliable?
The price and inventory of 1N5274B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5274B is usually 5 days.
3.What payment methods are accepted for 1N5274B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5274B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5274B?
1N5274B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5274B 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 1N5274B?
For technical support, including 1N5274B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5274B requirements.
6.How does Aetrix verify that 1N5274B is sourced from the original manufacturer or authorized distributors?
All 1N5274B 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 1N5274B meets industry standards.
7.What is the process for return or replacement of 1N5274B?
All 1N5274B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5274B, 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 1N5274B part is unused and in its original packaging.
Return procedure for 1N5274B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5274B 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…
