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Microchip Technology 1N5253B
- Part No.:
- 1N5253B
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5253B.pdf
- Description:
- DIODE ZENER 25V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:2,164
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Product details
Overview
1N5253B from Microsemi is a 500 mW, 25 V ±5% glass axial-lead Zener diode in DO-35 (DO-204AH) package, designed for precision voltage regulation in low-power analog circuits, reference supplies, and overvoltage protection. It delivers 5.0 Ω dynamic impedance at 35 mA test current, operates from –65°C to +175°C, and exhibits +0.089 %/°C temperature coefficient.
For engineers reviewing the 1N5253B datasheet, 1N5253B pinout, 1N5253B application, or 1N5253B equivalent, key selection factors include its 25 V nominal Zener voltage with tight 5% tolerance, low 5.0 Ω Zener impedance at IZT, stable high-temperature operation up to +175°C, and RoHS-compliant e3 variant availability.
Technical Context
The 1N5253B functions as a two-terminal shunt regulator, maintaining a stable 25 V output across a wide reverse current range (1.0 mA to 35 mA). Its breakdown behavior is characterized by a sharp knee and minimal capacitance (≈1.5 pF), enabling use in noise-sensitive references.
It employs a planar-diffused silicon junction in a hermetically sealed glass DO-35 package with tin-lead or matte-tin plating. The cathode band identifies polarity, and operation requires the banded end to be held positive relative to the anode for regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 25 V ±5% at 35 mA - defines regulated output level with guaranteed accuracy for reference design |
| Power Dissipation | 500 mW at 25°C - sets maximum continuous power handling before thermal derating applies |
| Zener Impedance | 5.0 Ω at IZT = 35 mA - ensures minimal output voltage variation under load changes |
| Temperature Coefficient | +0.089 %/°C - quantifies voltage drift per degree Celsius above 25°C for stability analysis |
| Reverse Current | ≤0.1 μA at 19 V - confirms low leakage below breakdown, critical for standby power integrity |
| Operating Temperature | –65°C to +175°C - supports deployment in aerospace, downhole, and industrial environments |
| Forward Voltage | ≤1.5 V at 200 mA - enables use as a clamping diode in bidirectional protection schemes |
Pinout & Package
Hermetically sealed axial-lead DO-35 (DO-204AH) glass 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. Weight: 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during Zener conduction | Connected to circuit ground or lower-potential node to enable shunt regulation |
| Cathode | Current source during Zener conduction | Banded end; connected to unregulated input to maintain 25 V at cathode-to-anode potential |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N52xxB series | Ensures standardized parametric limits and interchangeability across qualified suppliers |
| ±5% voltage tolerance (B suffix) | Reduces calibration overhead in fixed-reference designs versus ±10% (A) or ±20% (no suffix) |
| Low 5.0 Ω dynamic impedance | Minimizes output voltage sag under transient load steps, improving regulation fidelity |
| Radiation-hardened construction | Inherent hardness per MicroNote 050 supports use in space-qualified and nuclear instrumentation systems |
| ESD-insensitive (MIL-STD-750 Method 1020) | Eliminates need for handling precautions during manual assembly or field repair |
Applications
| Industrial Sensor Signal Conditioning | Avionics Power Supply Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure transducers in factory automation PLC modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing 25 V bias to Wheatstone bridge, compensating for supply ripple. Use Value: 5.0 Ω Zener impedance and +0.089 %/°C TC ensure bridge output remains within 0.2% full-scale error across –40°C to +85°C ambient. | Use Scenario: Generating a stable 25 V reference for ADC voltage scaling in flight control system monitoring boards. IC Role / Device Role / Timing Role: Precision shunt regulator feeding voltage divider network that sets ADC full-scale range. Use Value: Radiation hardness and –65°C to +175°C operating range allow direct placement near high-temp power converters without derating. |
| Medical Infusion Pump Overvoltage Clamp | Downhole Oilfield Instrumentation Reference |
Use Scenario: Protecting microcontroller I/O pins from transient surges on 24 V DC power rails in portable infusion devices. IC Role / Device Role / Timing Role: Bidirectional clamp using forward conduction (≤1.5 V) and Zener breakdown (25 V) to limit rail excursions. Use Value: Low 0.1 μA leakage at 19 V prevents battery drain during standby; glass DO-35 withstands sterilization thermal cycling. | Use Scenario: Providing temperature-stable bias for piezoelectric sensor front-ends in deep-well logging tools exposed to 150°C ambient. IC Role / Device Role / Timing Role: High-temperature shunt reference establishing gain-setting node in low-noise amplifier chain. Use Value: +0.089 %/°C TC and 175°C max rating reduce need for active compensation, simplifying downhole ASIC integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4743A (ON Semiconductor) | 25 V ±5%, 1.0 W, DO-41 package, 10 Ω ZZT at 11 mA | Higher power rating but larger footprint and higher impedance reduces regulation precision | Select when >500 mW dissipation is required; not drop-in due to DO-41 vs. DO-35 mechanical mismatch |
| BZX55C24 (Vishay) | 24 V ±5%, 500 mW, DO-35, 70 Ω ZZT at 5 mA | 1 V lower nominal voltage and significantly higher impedance limit use in high-accuracy references | Acceptable for non-critical clamping where 24 V suffices; verify 24 V vs. 25 V system margin requirements |
Compared with 1N4743A and BZX55C24, the 1N5253B offers superior regulation precision (5.0 Ω vs. 10 Ω/70 Ω) and tighter thermal stability (+0.089 %/°C) in the compact DO-35 form factor, making it optimal for space-constrained, high-fidelity reference designs.
Availability
1N5253B is available at Aetrix Electronics and suitable for industrial sensor conditioning, avionics reference generation, and downhole instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N5253B 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-temperature analog and mixed-signal components.
The 1N52xxB series was developed for military, aerospace, and industrial applications demanding guaranteed parametric performance, JEDEC registration, and operation beyond commercial temperature limits.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5253B?
The 1N5253B has a nominal Zener voltage of 25 V with a guaranteed tolerance of ±5%, as indicated by the "B" suffix. This specification is verified at 35 mA test current (IZT) and 25°C ambient temperature. The 1N5253B maintains this voltage regulation across its rated operating current range and temperature extremes from –65°C to +175°C.
What package type and marking does the 1N5253B use?
The 1N5253B uses the DO-35 (DO-204AH) glass axial-lead package with hermetic sealing and tin-lead or RoHS-compliant matte-tin plating. It is marked with the full part number "1N5253B", and the cathode is identified by a single black band on the glass body. Polarity must be observed: the banded end is the cathode and must be held positive relative to the anode for Zener operation.
How does the 1N5253B perform at elevated temperatures?
The 1N5253B is rated for continuous operation from –65°C to +175°C, with thermal resistance of 250°C/W junction-to-lead (3/8″ lead length). Its Zener voltage exhibits a temperature coefficient of +0.089 %/°C, meaning voltage increases predictably with temperature-critical for designs requiring drift compensation. Derating begins above 25°C per Figure 1 in the datasheet, reaching ~300 mW at +100°C ambient.
Is the 1N5253B suitable for low-leakage applications?
Yes-the 1N5253B specifies maximum reverse current (IR) of 0.1 μA at 19 V (80% of VZ), confirming very low leakage well below breakdown. This makes the 1N5253B appropriate for battery-powered systems, high-impedance reference nodes, and precision analog circuits where standby current must be minimized. Its ESD insensitivity (MIL-STD-750 Method 1020) further supports reliability in low-power signal paths.
Can the 1N5253B be used as a bidirectional clamp?
Yes-the 1N5253B supports bidirectional clamping: in forward bias, it conducts at ≤1.5 V (max) at 200 mA; in reverse bias, it regulates at 25 V. This dual-mode behavior allows it to protect downstream circuitry from both negative transients (via forward conduction) and positive overvoltages (via Zener breakdown), provided current limiting is implemented externally. Its glass DO-35 construction also withstands repeated surge events without parameter shift.
1N5253B 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):
- 25 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 35 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 19 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)
1N5253B FAQ
1.How can I place an order for 1N5253B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5253B 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 1N5253B reliable?
The price and inventory of 1N5253B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5253B is usually 5 days.
3.What payment methods are accepted for 1N5253B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5253B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5253B?
1N5253B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5253B 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 1N5253B?
For technical support, including 1N5253B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5253B requirements.
6.How does Aetrix verify that 1N5253B is sourced from the original manufacturer or authorized distributors?
All 1N5253B 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 1N5253B meets industry standards.
7.What is the process for return or replacement of 1N5253B?
All 1N5253B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5253B, 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 1N5253B part is unused and in its original packaging.
Return procedure for 1N5253B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5253B 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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