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Vishay General Semiconductor - Diodes Division ZPY75-TR
- Part No.:
- ZPY75-TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
ZPY75-TR.pdf
- Description:
- DIODE ZENER 75V 1.3W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,306
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Product details
Overview
ZPY75-TR from Vishay Semiconductors is a silicon planar power Zener diode rated for 75 V nominal Zener voltage (70–79 V range), 10 mA test current, 1300 mW power dissipation, and 13 Ω dynamic resistance at 1 kHz. It operates with a +8 × 10⁻⁴/°C temperature coefficient and is used in high-stability voltage reference and overvoltage clipping circuits in industrial power supplies.
For engineers reviewing the ZPY75-TR datasheet, ZPY75-TR pinout, ZPY75-TR application, or ZPY75-TR equivalent, key selection considerations include its DO-41 package thermal resistance (110 K/W), admissible Zener current up to 160 mA, and compliance with E12 voltage grading for precision stabilization across ambient temperatures from –55 °C to +175 °C.
Technical Context
This discrete Zener diode functions as a two-terminal voltage reference device, operating in reverse breakdown with tightly controlled VZ tolerance (±6.7% at 75 V) and low dynamic impedance. Its single-diode configuration supports DC stabilization and transient voltage clamping without external biasing.
Designed for operation under pulsed conditions (tp = 10 ms) with leads held at ambient temperature 4 mm from case, it maintains stable regulation up to Tj = 175 °C and meets MSL Level 1 moisture sensitivity per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 70–79 V range, nominal 75 V - defines precise DC reference or clamping threshold in regulated power rails |
| Test Current (IZT) | 10 mA - standard condition for specifying VZ; ensures measurement repeatability and datasheet comparability |
| Power Dissipation (Ptot) | 1300 mW - maximum steady-state power handling at Tamb = 25 °C with 4 mm lead length cooling |
| Dynamic Resistance (ZZ) | 13 Ω at 1 kHz - indicates low AC impedance for effective ripple suppression in feedback loops |
| Temperature Coefficient (TCVZ) | +8 × 10⁻⁴/°C - positive drift enables predictable compensation in temperature-varying circuits |
| Junction-to-Ambient Thermal Resistance (RthJA) | 110 K/W - determines allowable power derating above 25 °C ambient; critical for thermal design margin |
| Admissible Zener Current (IZ) | 70 mA (max), <160 mA pulse - sets safe continuous and transient current limits for reliability |
Pinout & Package
Package: DO-41 (DO-204AL), axial-leaded, epoxy-molded, UL 94 V-0 compliant, ~310 mg weight. Cathode identified by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node in shunt regulator | Connected to lower-potential side of circuit; establishes reference point for Zener voltage drop |
| Cathode | Reverse-biased Zener terminal / regulated output node | Banded end; carries regulated voltage relative to anode; must be biased above anode by ≥VZ |
Key Features
| Feature | Design Value |
|---|---|
| Silicon planar construction | Ensures tight VZ tolerance and long-term stability vs. alloy-junction alternatives |
| E12-standard voltage grading | Enables interoperability with standardized resistor/capacitor networks in analog control systems |
| 1300 mW power rating | Supports direct shunt regulation in 5–10 W auxiliary supplies without heatsinking |
| MSL Level 1 rating | Permits unlimited floor life and standard reflow without baking or special handling |
| +8 × 10⁻⁴/°C TCVZ | Allows predictable thermal drift modeling in wide-temperature industrial environments |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in isolated flyback or forward converter secondary-side regulation. IC Role / Device Role / Timing Role: Shunt voltage reference for TL431 or optocoupler-based error amplifiers. Use Value: Maintains ±1% output accuracy over line/load/temperature with 13 Ω ZZ minimizing loop gain variation. |
Use Scenario: Clamping transient surges on 48 V DC bus lines in factory automation I/O modules. IC Role / Device Role / Timing Role: Passive crowbar element absorbing >100 V spikes before downstream IC damage. Use Value: Withstands 160 mA peak surge current and dissipates 1300 mW without degradation under repeated 10 ms pulses. |
| Programmable Logic Controller Input Protection | Test Equipment Voltage Calibration Standard |
|
Use Scenario: Protecting 24 V digital input channels against field-wiring faults and inductive kickback. IC Role / Device Role / Timing Role: Primary clamp limiting input voltage to ≤79 V during fault events. Use Value: 70–79 V VZ range ensures reliable triggering above normal operating voltage while avoiding false trips. |
Use Scenario: Serving as traceable 75 V reference in benchtop multimeter calibration fixtures. IC Role / Device Role / Timing Role: Stable DC reference source for ADC/DAC linearity verification. Use Value: E12 grading and ±6.7% tolerance enable repeatable, cross-lab comparable measurements at 75 V point. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4745A-T | 75 V nominal, 1000 mW Ptot, 15 Ω ZZ, DO-41, ±5% tolerance | Lower power rating limits use in high-current clamping; tighter tolerance suits precision references | Prefer when board space allows same DO-41 footprint but lower thermal load is expected |
| BZX85C75 | 75 V nominal, 1300 mW Ptot, 20 Ω ZZ, DO-41, ±5% tolerance, higher TCVZ (+10 × 10⁻⁴/°C) | Higher dynamic resistance reduces ripple rejection; elevated TCVZ increases drift in wide-temp designs | Acceptable where cost is prioritized over thermal stability and AC performance |
Compared with 1N4745A-T and BZX85C75, ZPY75-TR delivers superior thermal robustness (1300 mW vs. 1000 mW), lower dynamic impedance (13 Ω vs. ≥15 Ω), and optimized temperature coefficient for industrial ambient ranges - making it preferred for high-reliability power rail stabilization.
Availability
ZPY75-TR is available at Aetrix Electronics and suitable for industrial power supply reference, overvoltage protection clamp, and programmable logic controller input protection requiring stable component supply and long-lifecycle support.
Supply support for ZPY75-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 and passive component manufacturer specializing in high-reliability discrete devices and sensors.
ZPY75-TR belongs to Vishay's silicon planar Zener diode family engineered for high-power stabilization and precision voltage clamping in harsh industrial and automotive environments.
FAQ
What is the Zener voltage tolerance for ZPY75-TR?
The ZPY75-TR has a specified Zener voltage range of 70 V to 79 V at 10 mA test current, corresponding to a ±6.7% tolerance around the nominal 75 V value. This tolerance is verified per the Vishay datasheet Rev. 2.4 (Document Number: 85790) and reflects manufacturing spread under standard test conditions. The ZPY75-TR maintains this specification across its qualified operating temperature range.
Can ZPY75-TR be used in surface-mount designs?
No, ZPY75-TR uses the through-hole DO-41 (DO-204AL) axial package and is not compatible with SMT assembly processes. It requires hole mounting and wave or selective soldering. For surface-mount equivalents, consider Vishay's SMAZ75 or similar SOD-123 packages - but note these differ in power rating, thermal resistance, and ZZ. The ZPY75-TR itself is strictly a leaded device.
What is the maximum allowable junction temperature for ZPY75-TR?
The absolute maximum junction temperature for ZPY75-TR is 175 °C, as defined in the Vishay Absolute Maximum Ratings table. Operation beyond this limit risks irreversible degradation of the silicon junction. Derating is required above 25 °C ambient per the Ptot vs. Tamb curve (Fig. 1), and thermal design must ensure RthJA = 110 K/W is respected with proper lead length and PCB copper area.
Does ZPY75-TR meet RoHS and REACH requirements?
Yes, ZPY75-TR complies with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, as confirmed in Vishay's material declarations (Document Number: 99912). The device uses lead-free terminations and UL 94 V-0 molding compound. Compliance status is maintained across all manufacturing lots, and full substance disclosure is available upon request from Aetrix Electronics.
How does the temperature coefficient affect ZPY75-TR in real-world circuits?
ZPY75-TR exhibits a +8 × 10⁻⁴/°C temperature coefficient, meaning its Zener voltage increases by approximately 60 mV per 10 °C rise in junction temperature. In a 48 V system with 75 V clamping, this results in ~0.08 V/°C drift - critical for designs operating from –40 °C to +85 °C ambient. Engineers must account for this in overvoltage margin calculations, especially where self-heating exceeds 20 °C rise. The ZPY75-TR's predictable TCVZ enables accurate thermal compensation.
ZPY75-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):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 1.3 W
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 56 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)
ZPY75-TR FAQ
1.How can I place an order for ZPY75-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ZPY75-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 ZPY75-TR reliable?
The price and inventory of ZPY75-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZPY75-TR is usually 5 days.
3.What payment methods are accepted for ZPY75-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZPY75-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZPY75-TR?
ZPY75-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZPY75-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 ZPY75-TR?
For technical support, including ZPY75-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZPY75-TR requirements.
6.How does Aetrix verify that ZPY75-TR is sourced from the original manufacturer or authorized distributors?
All ZPY75-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 ZPY75-TR meets industry standards.
7.What is the process for return or replacement of ZPY75-TR?
All ZPY75-TR units undergo pre-shipment inspection (PSI). If there is an issue with ZPY75-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 ZPY75-TR part is unused and in its original packaging.
Return procedure for ZPY75-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZPY75-TR Tags
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