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Microchip Technology 1N5240A/TR
- Part No.:
- 1N5240A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5240A/TR.pdf
- Description:
- DIODE ZENER 10V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,627
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Product details
Overview
1N5240A/TR from Microsemi is a 10 V, ±10% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 20 mA test current, 600 Ω dynamic impedance at IZK, and operating from –65°C to +175°C. It serves as a precision voltage reference or shunt regulator in low-power analog circuits, power supply feedback paths, and overvoltage protection.
For engineers reviewing the 1N5240A/TR datasheet, 1N5240A/TR pinout, 1N5240A/TR application, or 1N5240A/TR equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (310°C/W on FR4), reverse leakage at VR = 7.6 V, temperature coefficient (+0.075%/°C), and RoHS compliance via "e3" suffix option.
Technical Context
This discrete Zener diode operates in reverse breakdown mode with cathode band indicating polarity. Its regulation stability relies on specified test current (IZT = 20 mA) and defined thermal path-junction-to-lead (250°C/W at 10 mm lead length) or junction-to-ambient (310°C/W on FR4 with 4 mm² copper pads).
Electrical behavior is characterized by two impedance metrics: ZZT = 600 Ω measured at IZK = 0.25 mA, and ZZK = 3.0 Ω at same IZK, confirming sharp knee performance. Temperature coefficient αVZ = +0.075%/°C applies under IZT = 20 mA, T1 = 25°C, T2 = 125°C per Note 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ @ IZT | 10 V ±10% at 20 mA - defines nominal regulation point with guaranteed min/max bounds for feedback loop design |
| Power Dissipation | 500 mW at 25°C - derates linearly above 25°C; requires thermal management on PCB or chassis mount |
| Zener Impedance ZZT | 600 Ω @ IZK = 0.25 mA - indicates dynamic resistance near knee; impacts regulation accuracy under varying load |
| Reverse Leakage IR | 30 μA @ VR = 7.6 V - sets minimum bias current needed to maintain regulation; affects quiescent power in low-IQ designs |
| Temp. Coefficient αVZ | +0.075 %/°C - positive drift means output rises with temperature; must be compensated in precision references |
| Operating Temp. | –65°C to +175°C - supports aerospace, downhole, and industrial environments without derating penalties |
| Forward Voltage VF | ≤1.5 V @ 200 mA - ensures predictable clamping during transient forward conduction or ESD events |
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; device operated with banded end positive relative to anode for Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to system ground or lower-potential rail; forms return path for Zener current |
| Cathode (banded end) | Regulated output node | Provides stable 10 V reference when reverse-biased; connects to feedback divider or load |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered DO-35 package | Ensures mechanical interchangeability and standardized mounting across legacy and new designs |
| ±10% voltage tolerance (A suffix) | Meets cost-sensitive industrial applications where tighter tolerances are unnecessary |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection in handling and assembly for high-reliability lines |
| Inherently radiation hard (MicroNote 050) | Validated for use in space-qualified or nuclear instrumentation without additional shielding |
| Tape-and-reel packaging (TR suffix) | Enables automated SMT placement despite axial-leaded form factor via carrier tape compatibility |
Applications
| Voltage Reference for Op-Amp Circuits | Overvoltage Clamp in Sensor Interfaces |
|---|---|
Use Scenario: Providing stable 10 V reference to instrumentation amplifier input stages in data acquisition systems. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise common-mode level for differential signal conditioning. Use Value: Enables <1% full-scale error over –40°C to +85°C ambient using only passive components and standard layout. | Use Scenario: Protecting 3.3 V ADC inputs from 12 V transients induced by nearby relay switching or motor commutation. IC Role / Device Role / Timing Role: Bidirectional transient suppressor-clamps positive excursions above 10 V while blocking reverse leakage below 1 μA. Use Value: Prevents ADC saturation and latch-up without adding series resistance that degrades bandwidth or SNR. |
| Feedback Divider in Linear Regulators | Calibration Reference in Portable Meters |
Use Scenario: Setting output voltage of adjustable LDOs (e.g., LM317) via resistor divider tied to 10 V Zener node. IC Role / Device Role / Timing Role: Precision voltage sink defining regulated output setpoint independent of input ripple or load variation. Use Value: Achieves ±2% output accuracy over line/load/temperature without trimming or active compensation. | Use Scenario: Serving as traceable calibration anchor in handheld multimeters requiring field recalibration against known standards. IC Role / Device Role / Timing Role: Stable, low-drift reference source used during self-test and auto-zero routines before measurement cycles. Use Value: Maintains ±0.5% reading consistency across 5-year service life due to inherent radiation hardness and minimal aging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A | Same 10 V, ±5% tolerance, but 1 W power rating in DO-41 package; higher thermal mass and larger footprint | Better suited for higher-current regulation (>30 mA) or less constrained board space; not drop-in due to different package and lead spacing | Select when >500 mW dissipation or improved thermal margin is required; verify PCB pad layout compatibility |
| BZX55C10 | 10 V, ±5% tolerance, 500 mW in DO-35, but lower ZZT (15 Ω typical) and tighter tempco (±0.05%/°C); RoHS-only | Preferred for high-precision analog references where low impedance and stable tempco outweigh cost sensitivity | Choose when regulation accuracy and low noise are critical; confirm availability of A-suffix (±10%) variant if tolerance matching is mandatory |
Compared with 1N4740A and BZX55C10, the 1N5240A/TR offers JEDEC-standardized DO-35 geometry with military screening options (JAN/JANTX), inherent radiation hardness, and tape-and-reel readiness-making it optimal for aerospace, defense, and long-lifecycle industrial deployments where reliability and supply continuity outweigh marginal parameter differences.
Availability
1N5240A/TR is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection, and feedback regulation applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N5240A/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 analog, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N52xx series was designed specifically for ruggedized voltage regulation in mission-critical systems where wide temperature operation, ESD immunity, and long-term parametric stability are non-negotiable.
FAQ
What is the Zener voltage tolerance for 1N5240A/TR?
The "A" suffix in 1N5240A/TR specifies a nominal Zener voltage of 10 V with a tolerance of ±10%, as confirmed in the Electrical Characteristics table on page 2 of the Microsemi datasheet. This tolerance applies under standard test conditions (IZT = 20 mA, TA = 25°C) and is guaranteed across the full operating temperature range.
Does 1N5240A/TR have RoHS-compliant variants?
Yes-RoHS-compliant versions of 1N5240A/TR are available by adding the "e3" suffix (e.g., 1N5240Ae3/TR), as stated in the FEATURES section. These devices use annealed matte-tin plating and meet lead-free soldering requirements per JEDEC J-STD-020, with no exemption needed for high-reliability applications.
What is the maximum reverse leakage current for 1N5240A/TR?
The maximum reverse leakage current (IR) for 1N5240A/TR is 30 μA at VR = 7.6 V, per the Electrical Characteristics table. This value is measured after 20 seconds of thermal stabilization and defines the upper bound of standby current draw when the diode is reverse-biased below its Zener knee.
Can 1N5240A/TR be used in surface-mount designs?
No-1N5240A/TR is a through-hole axial-leaded DO-35 device and is not surface-mount compatible. However, Microsemi offers surface-mount equivalents in the MLL52xxB series (e.g., MLL5240B) in DO-213AA (MELF) package, which share identical electrical specs but require requalification for thermal and mechanical layout.
What is the temperature coefficient of 1N5240A/TR?
The temperature coefficient (αVZ) of 1N5240A/TR is +0.075 %/°C, measured between 25°C and 125°C at IZT = 20 mA. This positive coefficient means the Zener voltage increases linearly with temperature, a key factor when designing temperature-stable references or compensating circuits.
1N5240A/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):
- 10 V
- Tolerance:
- ±10%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 7.6 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)
1N5240A/TR FAQ
1.How can I place an order for 1N5240A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5240A/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 1N5240A/TR reliable?
The price and inventory of 1N5240A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5240A/TR is usually 5 days.
3.What payment methods are accepted for 1N5240A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5240A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5240A/TR?
1N5240A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5240A/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 1N5240A/TR?
For technical support, including 1N5240A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5240A/TR requirements.
6.How does Aetrix verify that 1N5240A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5240A/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 1N5240A/TR meets industry standards.
7.What is the process for return or replacement of 1N5240A/TR?
All 1N5240A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5240A/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 1N5240A/TR part is unused and in its original packaging.
Return procedure for 1N5240A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5240A/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
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