My Inquiry
My Account
Microchip Technology 1N5248A/TR
- Part No.:
- 1N5248A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5248A/TR.pdf
- Description:
- DIODE ZENER 18V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:4,300
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5248A/TR from Microsemi is a 18 V, ±10% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 7.0 mA test current, 600 Ω dynamic impedance at IZK, and operating from –65°C to +175°C. It regulates voltage in low-power reference and protection circuits such as power supply feedback paths and overvoltage clamping.
For engineers reviewing the 1N5248A/TR datasheet, 1N5248A/TR pinout, 1N5248A/TR application, or 1N5248A/TR equivalent, key selection criteria include Zener voltage accuracy, thermal stability across industrial temperature ranges, low leakage at rated VR, compatibility with manual or wave soldering (260°C/10 s), and RoHS-compliant plating options.
Technical Context
This discrete Zener diode operates in reverse breakdown mode with cathode band marking polarity. Its regulation performance is specified at 7.0 mA test current (IZT) and validated under stabilized thermal conditions per JEDEC JESD24-A, using 3/8″ lead length for junction-to-lead thermal resistance measurement.
Electrical behavior includes a +0.085 %/°C temperature coefficient (αVZ), 0.1 μA maximum reverse current at 14.3 V (VR), and minimal capacitance (<2 pF typical per Figure 2), making it suitable for stable DC reference generation rather than high-frequency signal applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 18 V @ 7.0 mA IZT - defines regulated output voltage under standard test conditions |
| Zener Tolerance | ±10% (A suffix) - guarantees VZ between 16.2 V and 19.8 V at 25°C |
| Power Dissipation | 500 mW at 25°C TL - derates linearly above 50°C lead temperature per Figure 1 |
| Zener Impedance | 600 Ω @ IZK = 0.25 mA - indicates knee sharpness and regulation stiffness at low current |
| Reverse Leakage | 0.1 μA max @ 14.3 V VR - ensures minimal error current in high-impedance reference nodes |
| Temp. Coefficient | +0.085 %/°C - quantifies VZ drift magnitude over –65°C to +175°C operating range |
| Forward Voltage | ≤1.5 V @ 200 mA - defines forward conduction threshold for polarity verification |
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; case dimensions per Microsemi drawing (L ≈ 4.4 mm, D ≈ 1.9 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node during Zener operation; used for forward bias verification |
| Cathode | Banded end | Connected to higher-potential node during regulation; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered device | Complies with standardized 1N52xx series mechanical and electrical definitions for interchangeability |
| Radiation hardness | Inherently radiation-hard per MicroNote 050 - supports use in aerospace and defense systems without additional hardening |
| ESD insensitivity | Qualified to MIL-STD-750 Method 1020 - eliminates need for ESD handling controls in assembly |
| RoHS compliance option | e3 suffix available - meets EU RoHS Directive 2011/65/EU with annealed matte-tin plating |
| Tape-and-reel packaging | TR suffix enables automated pick-and-place placement - standard per EIA-296 |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator circuits or op-amp-based references. IC Role / Device Role / Timing Role: Provides precise, temperature-compensated DC reference voltage for error amplifiers. Use Value: Delivers 18 V ±10% regulation with <0.1 μA leakage, minimizing load error in high-impedance divider networks. |
Use Scenario: Protecting input pins of microcontrollers or analog front-ends from transient overvoltage. IC Role / Device Role / Timing Role: Shunts excess energy to ground when voltage exceeds 18 V threshold. Use Value: Activates at predictable 18 V with sharp knee (600 Ω ZZK), limiting clamping delay and peak overshoot. |
| Temperature-Stable Biasing | Current Source Stabilization |
Use Scenario: Setting bias points in amplifier stages requiring minimal thermal drift. IC Role / Device Role / Timing Role: Supplies fixed voltage reference to base/gate networks in discrete transistor circuits. Use Value: +0.085 %/°C αVZ enables predictable drift compensation in multi-stage analog designs. |
Use Scenario: Establishing stable current through LEDs or sensor excitation circuits. IC Role / Device Role / Timing Role: Maintains constant voltage across series current-setting resistor. Use Value: 500 mW rating supports up to ~27.8 mA continuous current (18 V / 650 Ω typical), enabling robust LED drive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4746A | 18 V, ±5%, 1 W DO-41 package; 20 mA IZT; 20 Ω ZZT; -65°C to +175°C | Higher power rating and lower impedance support higher-current regulation but requires larger PCB footprint | Select when >500 mW dissipation or <20 Ω dynamic impedance is required; not drop-in due to DO-41 vs. DO-35 package |
| BZX55C18 | 18 V, ±5%, 500 mW DO-35; 5 mA IZT; 40 Ω ZZT; -65°C to +175°C; RoHS-only | Lower Zener impedance and tighter tolerance, but no military screening options or radiation hardness claim | Select for commercial-grade cost-sensitive designs where radiation hardness and MIL-PRF-19500 screening are unnecessary |
Compared with 1N5248A/TR, 1N4746A offers higher power and lower impedance but larger DO-41 packaging, while BZX55C18 provides tighter tolerance and lower ZZT in same DO-35 form factor but lacks radiation hardness and military screening variants.
Availability
1N5248A/TR is available at Aetrix Electronics and suitable for power supply reference design, overvoltage protection circuits, and temperature-stable biasing applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N5248A/TR 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-performance analog and mixed-signal components.
The 1N52xx series was designed for precision voltage regulation in aerospace, defense, and industrial systems where wide temperature operation, long-term stability, and reliability under harsh environments are critical.
FAQ
What is the Zener voltage tolerance for 1N5248A/TR?
The "A" suffix in 1N5248A/TR specifies a nominal Zener voltage tolerance of ±10% at 25°C. This means the actual measured VZ of any unit will fall between 16.2 V and 19.8 V when tested at 7.0 mA IZT and stabilized thermal conditions. The tolerance remains valid across the full –65°C to +175°C operating temperature range, though voltage drift follows the +0.085 %/°C temperature coefficient.
Is 1N5248A/TR compatible with lead-free soldering processes?
Yes, 1N5248A/TR is offered in both tin-lead and RoHS-compliant matte-tin plating versions. The RoHS version (with "e3" suffix) supports lead-free reflow and wave soldering up to 260°C for 10 seconds, per MIL-STD-750 Method 2026. Standard non-e3 units are qualified for tin-lead processes only and should not be subjected to lead-free thermal profiles without validation.
Does 1N5248A/TR have radiation hardness certification?
Yes, 1N5248A/TR is inherently radiation-hard per MicroNote 050, a documented characteristic of the DO-35 glass package and process. It is not individually certified per MIL-STD-883, but its radiation tolerance is verified at the family level and supports use in low-dose-rate space and avionics applications without additional qualification testing.
What is the maximum reverse leakage current for 1N5248A/TR?
The maximum reverse leakage current (IR) for 1N5248A/TR is 0.1 μA when measured at 14.3 V (VR = 0.79 × VZ), per the Electrical Characteristics table on page 2 of the Microsemi datasheet. This value is guaranteed across the full operating temperature range and reflects the device's suitability for high-impedance reference nodes where leakage-induced error must be minimized.
Can 1N5248A/TR be used in surface-mount designs?
No, 1N5248A/TR is an axial-leaded DO-35 (DO-204AH) through-hole device and is not suitable for direct surface-mount assembly. However, Microsemi offers surface-mount equivalents in the MLL52xxB series (e.g., MLL5248B) in DO-213AA (MELF) package with identical electrical specifications and "-1" suffix options for internal bond variants.
1N5248A/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 18 V
- Tolerance:
- ±10%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 21 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 13.3 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)
1N5248A/TR FAQ
1.How can I place an order for 1N5248A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5248A/TR 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 1N5248A/TR reliable?
The price and inventory of 1N5248A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5248A/TR is usually 5 days.
3.What payment methods are accepted for 1N5248A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5248A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5248A/TR?
1N5248A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5248A/TR 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 1N5248A/TR?
For technical support, including 1N5248A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5248A/TR requirements.
6.How does Aetrix verify that 1N5248A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5248A/TR 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 1N5248A/TR meets industry standards.
7.What is the process for return or replacement of 1N5248A/TR?
All 1N5248A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5248A/TR, 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 1N5248A/TR part is unused and in its original packaging.
Return procedure for 1N5248A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5248A/TR 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…
