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Vishay General Semiconductor - Diodes Division ZPY43-TR
- Part No.:
- ZPY43-TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
ZPY43-TR.pdf
- Description:
- DIODE ZENER 43V 1.3W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:24,997
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Product details
Overview
ZPY43-TR from Vishay Semiconductors is a silicon planar power Zener diode in DO-41 (DO-204AL) package, rated for 1300 mW total power dissipation at 25 °C with 43 V nominal Zener voltage (40–46 V range), 10 mA test current, and 24 Ω dynamic resistance at 1 kHz - used in high-stability voltage regulation and overvoltage clipping circuits for industrial power supplies and analog signal conditioning.
For engineers reviewing the ZPY43-TR datasheet, ZPY43-TR pinout, ZPY43-TR application, or ZPY43-TR equivalent, key selection criteria include its ±3 V Zener tolerance at 10 mA, -70 °C to +175 °C storage temperature range, MSL Level 1 soldering compatibility, and DO-41 axial lead form factor suitable for through-hole PCB mounting in high-reliability DC bias and reference designs.
Technical Context
This device operates as a single-element, unidirectional Zener diode with cathode identification via band marking. Its breakdown behavior is characterized by a temperature coefficient of +8 × 10⁻⁴/°C at IZT = 10 mA, indicating positive drift with junction temperature rise - critical for precision reference stability in thermally varying environments.
The ZPY43-TR delivers 35 mA maximum admissible Zener current under pulsed conditions (tp = 10 ms), with thermal resistance RthJA = 110 K/W when leads are held at ambient temperature at 4 mm from case - enabling predictable derating up to 175 °C junction temperature in properly heatsinked layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 40–46 V range, nominal 43 V at 10 mA - defines stable regulation point for mid-range DC rail clamping |
| Power Dissipation (Ptot) | 1300 mW at Tamb = 25 °C - supports robust transient energy absorption without thermal runaway |
| Dynamic Resistance (ZZ) | 24 Ω at f = 1 kHz, IZT = 10 mA - ensures low AC impedance for ripple suppression in feedback networks |
| Temperature Coefficient (TCVZ) | +8 × 10⁻⁴/°C at IZT = 10 mA - indicates predictable positive voltage drift with temperature |
| Admissible Zener Current (IZ) | 35 mA max (pulsed, tp = 10 ms) - sets safe operating limit for surge protection duty cycles |
| Junction Temperature (Tj) | 175 °C max - enables operation in high-ambient industrial enclosures without forced cooling |
| Storage Temperature | -55 to +175 °C - compatible with automotive under-hood and industrial outdoor deployment |
Pinout & Package
Package: DO-41 (DO-204AL), axial-leaded, epoxy-molded, UL 94 V-0 compliant, ~310 mg weight, MSL Level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side in reverse-biased Zener configuration; carries forward current during fault or startup |
| Cathode | Zener breakdown terminal | Marked with band; connected to higher-potential side; conducts regulated current when reverse voltage exceeds VZ |
Key Features
| Feature | Design Value |
|---|---|
| Silicon planar construction | Ensures tight VZ tolerance control and long-term parametric stability across temperature and life |
| E12-standard Zener grading | Enables standardized BOM selection and interchangeability within 10% voltage steps for design reuse |
| 1300 mW power rating | Supports direct replacement of legacy 1 W Zeners without board-level thermal redesign |
| DO-41 axial package | Provides mechanical robustness and proven manufacturability in wave-soldered industrial assemblies |
| MSL Level 1 handling | Eliminates bake requirements prior to reflow, reducing production overhead and moisture-related defects |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing +48 V intermediate bus in programmable logic controller (PLC) power modules. IC Role / Device Role / Timing Role: Zener diode providing precise 43 V reference for error amplifier feedback loop. Use Value: Maintains ±3% output regulation under load transients due to low 24 Ω dynamic resistance and 1300 mW power headroom. |
Use Scenario: Clamping induced surges on 42 V automotive battery monitoring lines. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting peak voltage to 46 V during load-dump events. Use Value: Absorbs 35 mA pulsed current without degradation, leveraging 175 °C junction rating for under-hood reliability. |
| Analog Signal Conditioning Reference | High-Temperature Sensor Biasing |
Use Scenario: Generating stable 43 V bias for high-voltage op-amp input stages in process instrumentation. IC Role / Device Role / Timing Role: Precision shunt reference establishing common-mode voltage for differential ADC front-end. Use Value: +8 × 10⁻⁴/°C TCVZ enables predictable calibration offset compensation across -40 to +125 °C operating range. |
Use Scenario: Providing regulated bias to RTD bridge excitation circuit in oil & gas downhole tools. IC Role / Device Role / Timing Role: High-temperature-stable Zener supplying constant current source for platinum sensor excitation. Use Value: Operates continuously at 150 °C junction temperature with no parameter shift, validated per DO-41 thermal derating curve. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A-T | 43 V nominal, 1 W rating, 25 Ω ZZ, DO-41, but ±5% tolerance (vs. ZPY43-TR's ±3 V range) | Lower precision; suited for non-critical clamping where tighter VZ spread is not required | Select when cost sensitivity outweighs regulation accuracy; verify thermal margin at full load |
| BZX85C43 | 43 V nominal, 1.3 W rating, 30 Ω ZZ, DO-41, but only rated to 150 °C Tj (vs. 175 °C) | Limited high-temperature endurance; unsuitable for sustained operation above 125 °C ambient | Prefer for commercial-grade designs with controlled thermal environment; avoid in extended-temperature industrial use |
Compared with 1N4749A-T and BZX85C43, the ZPY43-TR offers superior voltage tolerance control, higher junction temperature capability, and lower dynamic resistance - making it the preferred choice for precision regulation and high-reliability industrial deployments where thermal and parametric stability are critical.
Availability
ZPY43-TR is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection circuits, analog signal conditioning references, and high-temperature sensor biasing requiring stable component supply and long-lifecycle support.
Supply support for ZPY43-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, power efficiency, and ruggedized packaging.
The ZPY series belongs to Vishay's silicon planar Zener diode product line, engineered for high-power stabilization and clipping in harsh-environment industrial, automotive, and telecom infrastructure applications.
FAQ
What is the Zener voltage tolerance of ZPY43-TR at 10 mA test current?
The ZPY43-TR has a specified Zener voltage range of 40 V to 46 V at IZT = 10 mA, yielding a nominal 43 V with ±3 V absolute tolerance. This corresponds to approximately ±7% variation - tighter than standard E12-grade Zeners and confirmed in the "Electrical Characteristics" table of Vishay document 85790 Rev. 2.4. The ZPY43-TR achieves this via silicon planar processing and graded binning.
Can ZPY43-TR be used in surface-mount designs?
No, the ZPY43-TR is packaged exclusively in the through-hole DO-41 (DO-204AL) axial lead format and is not available in SMD variants such as SMA or SOD-123. It requires wave or hand soldering with 4 mm lead length kept at ambient temperature for thermal derating compliance. For SMT alternatives, consider Vishay's PLZ series or other qualified SMD Zener families - but ZPY43-TR itself is not SMT-compatible.
What is the maximum allowable junction temperature for ZPY43-TR?
The ZPY43-TR has a maximum junction temperature (Tj) rating of 175 °C, as stated in the Absolute Maximum Ratings table of Vishay document 85790. This allows continuous operation in high-ambient environments like motor drives or power converters when combined with appropriate PCB copper area and airflow. Derating begins linearly above 25 °C ambient per the Ptot vs. Tamb curve on page 3.
Does ZPY43-TR meet RoHS and REACH compliance?
Yes, the ZPY43-TR complies with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, as confirmed by Vishay's material categorization documentation (www.vishay.com/doc?99912). The molding compound is UL 94 V-0 rated, and the device contains no substances restricted beyond threshold limits - verified via certified supplier declarations and internal testing protocols.
How does the temperature coefficient of ZPY43-TR affect long-term reference stability?
The ZPY43-TR exhibits a temperature coefficient of +8 × 10⁻⁴/°C at IZT = 10 mA, meaning its Zener voltage increases by ~0.034 V per 10 °C rise. In a 43 V reference, this yields ~0.08% drift per 10 °C - manageable in compensated designs but critical for unbuffered high-precision applications. System-level calibration or complementary TC components may be needed for sub-0.1% total drift over -40 to +125 °C.
ZPY43-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 1.3 W
- Impedance (Max) (Zzt):
- 35 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 32 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 175°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
ZPY43-TR FAQ
1.How can I place an order for ZPY43-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ZPY43-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 ZPY43-TR reliable?
The price and inventory of ZPY43-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZPY43-TR is usually 5 days.
3.What payment methods are accepted for ZPY43-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZPY43-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZPY43-TR?
ZPY43-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZPY43-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 ZPY43-TR?
For technical support, including ZPY43-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZPY43-TR requirements.
6.How does Aetrix verify that ZPY43-TR is sourced from the original manufacturer or authorized distributors?
All ZPY43-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 ZPY43-TR meets industry standards.
7.What is the process for return or replacement of ZPY43-TR?
All ZPY43-TR units undergo pre-shipment inspection (PSI). If there is an issue with ZPY43-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 ZPY43-TR part is unused and in its original packaging.
Return procedure for ZPY43-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZPY43-TR Tags
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