My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1N5240B-TR
- Part No.:
- 1N5240B-TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5240B-TR.pdf
- Description:
- DIODE ZENER 10V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:35,423
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5240B-TR from Vishay Semiconductors is a silicon planar Zener diode with nominal 10 V zener voltage, ±5 % tolerance (B-suffix), 500 mW power rating, and DO-35 package. It operates at 20 mA test current, exhibits 8 Ω dynamic resistance at IZT1, and serves as a precision voltage reference in low-power linear regulators and analog sensor biasing circuits.
For engineers reviewing the 1N5240B-TR datasheet, 1N5240B-TR pinout, 1N5240B-TR application, or 1N5240B-TR equivalent, key selection criteria include zener voltage accuracy at 20 mA, thermal resistance of 300 K/W, reverse leakage ≤3 μA at 7.6 V, and compatibility with through-hole PCB layouts requiring DO-35 footprint compliance.
Technical Context
This discrete Zener diode functions as a two-terminal shunt voltage regulator, maintaining stable output voltage across varying load currents by operating in reverse breakdown. Its junction temperature range spans –65 °C to +175 °C, and it achieves thermal equilibrium under DC measurement conditions with 9.5 mm lead length.
The device uses silicon planar construction for consistent breakdown characteristics and low dynamic impedance. Its temperature coefficient of +0.075 %/K at 10 V enables predictable drift compensation in temperature-sensitive references, while its 1.1 V forward voltage at 200 mA supports basic polarity verification during functional testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage (VZ) | 10 V nominal, ±5 % tolerance - defines precise regulation point for 9.5–10.5 V reference applications |
| Power dissipation (Ptot) | 500 mW at TL ≤ 25 °C - sets maximum continuous power handling without derating |
| Test current (IZT1) | 20 mA - standard operating point where VZ and ZZ are specified and calibrated |
| Dynamic resistance (ZZ) | 8 Ω at IZT1 - determines regulation stiffness and output voltage variation under load transients |
| Reverse leakage (IR) | ≤3 μA at VR = 7.6 V - ensures minimal quiescent current in high-impedance bias networks |
| Temperature coefficient (αVZ) | +0.075 %/K - quantifies voltage drift per degree Celsius for thermal stability analysis |
| Junction-to-ambient RthJA | 300 K/W - defines thermal rise per watt in free-air mounting; critical for ambient temperature derating |
Pinout & Package
DO-35 (DO-204AH) glass axial package with cathode band marking; total weight ≈125 mg, UL 94 V-0 molding compound, MSL level 1, peak soldering temperature 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; supplies regulated 10 V when reverse-biased and current ≥ IZT1 flows through external series resistor |
Key Features
| Feature | Design Value |
|---|---|
| Silicon planar construction | Ensures repeatable Zener breakdown voltage and low parameter spread across production lots |
| ±5 % VZ tolerance (B-suffix) | Enables cost-effective voltage referencing where tighter tolerance is not required for system accuracy |
| 300 K/W thermal resistance | Supports reliable operation up to 175 °C junction temperature with standard lead-forming and board spacing |
| 1.1 V forward voltage at 200 mA | Allows quick functional verification using standard multimeter diode-test mode without dedicated test fixtures |
| DO-35 axial package | Provides mechanical robustness and proven reliability in through-hole industrial control and legacy instrumentation designs |
Applications
| Industrial Sensor Biasing | Low-Power Voltage Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) and strain gauges in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt voltage reference establishing fixed 10 V bias point independent of supply rail fluctuations. Use Value: Enables <1 % full-scale error in 16-bit ADC measurements by minimizing reference drift over –40 °C to +85 °C ambient. |
Use Scenario: Generating precise reference for op-amp-based comparators in battery-monitoring circuits for medical wearables. IC Role / Device Role / Timing Role: Two-terminal passive reference source replacing more complex IC references where ultra-low quiescent current is critical. Use Value: Delivers 10 V reference with only 3 μA leakage at 7.6 V, extending battery life beyond 3 years in sleep-mode dominant operation. |
| Linear Regulator Feedback | Overvoltage Protection Clamp |
Use Scenario: Setting output voltage in discrete NPN pass-transistor linear regulators for FPGA core supply sequencing. IC Role / Device Role / Timing Role: Zener element in feedback divider network defining regulated 1.2 V output via resistor ratio scaling. Use Value: Maintains ±2 % output accuracy across 10–100 mA load range due to 8 Ω dynamic resistance limiting load-induced droop. |
Use Scenario: Clamping transient surges on 12 V automotive body-control module (BCM) microcontroller I/O lines. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting ESD and load-dump energy above 10.5 V threshold. Use Value: Limits clamped voltage to ≤11.2 V during 1 kV/500 Ω ISO 7637-2 pulse 1, protecting 3.3 V logic inputs via series current-limiting resistor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A-T | 10 V nominal, ±5 %, 1 W power rating, DO-41 package, 17 Ω ZZ at 25 mA | Higher power handling but larger footprint and higher dynamic impedance reduce regulation precision | Select when >500 mW dissipation is required and board space allows DO-41 mounting |
| MMSZ5240ET1G | 10 V nominal, ±5 %, 500 mW, SOD-123 surface-mount package, 8 Ω ZZ at 20 mA | Same electrical specs but requires reflow-compatible layout; no axial lead-forming needed | Select for automated assembly, space-constrained PCBs, or mixed-technology boards needing SMT compatibility |
Compared with 1N5240B-TR, the 1N4740A-T offers higher power margin but sacrifices regulation tightness, while the MMSZ5240ET1G matches electrical performance exactly but shifts to surface-mount implementation-requiring layout revision but enabling higher assembly throughput.
Availability
1N5240B-TR is available at Aetrix Electronics and suitable for industrial sensor biasing, low-power voltage reference, and linear regulator feedback applications requiring stable component supply, long-term obsolescence management, and traceable sourcing.
Supply support for 1N5240B-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
Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on reliability and precision.
The 1N52xx family was designed for general-purpose voltage regulation and reference applications in industrial, automotive, and consumer electronics where cost-effective, through-hole Zener solutions are required.
FAQ
What is the zener voltage tolerance for 1N5240B-TR?
The "B" suffix in 1N5240B-TR denotes a ±5 % zener voltage tolerance, meaning its measured breakdown voltage falls between 9.5 V and 10.5 V at 20 mA test current and thermal equilibrium. This tolerance is verified per Vishay specification 85588 Rev. 2.4 and applies to all units in the 1N5240B-TR reel shipment.
Can 1N5240B-TR be used in surface-mount designs?
No, 1N5240B-TR uses a DO-35 axial glass package intended for through-hole mounting. For surface-mount equivalents, consider the MMSZ5240ET1G (SOD-123) or MMBZ5240ET1G (SOT-23), which share identical 10 V ±5 % specifications but require different land patterns and reflow profiles.
What is the maximum reverse leakage current for 1N5240B-TR?
The maximum reverse leakage current for 1N5240B-TR is 3 μA at VR = 7.6 V (76 % of nominal VZ), as specified in Vishay's 85588 datasheet Table "ELECTRICAL CHARACTERISTICS". This value is measured at Tamb = 25 °C and confirms suitability for high-impedance bias networks.
How does thermal resistance affect 1N5240B-TR performance in enclosed enclosures?
With RthJA = 300 K/W, 1N5240B-TR's junction temperature rises 300 K per watt dissipated in still air. In an enclosed enclosure with 50 °C ambient, dissipating 300 mW raises Tj to ~140 °C - within its 175 °C limit but requiring derating per Figure 3 in the 85588 datasheet to ensure long-term reliability.
Is 1N5240B-TR RoHS-compliant and halogen-free?
Yes, 1N5240B-TR complies with RoHS Directive 2011/65/EU and is halogen-free per Vishay's material categorization document 99912. The DO-35 package uses UL 94 V-0 molding compound and meets JEDEC J-STD-020 MSL level 1 requirements for moisture sensitivity.
1N5240B-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5240B-TR FAQ
1.How can I place an order for 1N5240B-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5240B-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 1N5240B-TR reliable?
The price and inventory of 1N5240B-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5240B-TR is usually 5 days.
3.What payment methods are accepted for 1N5240B-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5240B-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5240B-TR?
1N5240B-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5240B-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 1N5240B-TR?
For technical support, including 1N5240B-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5240B-TR requirements.
6.How does Aetrix verify that 1N5240B-TR is sourced from the original manufacturer or authorized distributors?
All 1N5240B-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 1N5240B-TR meets industry standards.
7.What is the process for return or replacement of 1N5240B-TR?
All 1N5240B-TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5240B-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 1N5240B-TR part is unused and in its original packaging.
Return procedure for 1N5240B-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5240B-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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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 …
