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Microchip Technology 1PMT5946BE3/TR7
- Part No.:
- 1PMT5946BE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5946BE3/TR7.pdf
- Description:
- DIODE ZENER 75V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,059
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Product details
Overview
1PMT5946BE3/TR7 from Microsemi is a 75 V, ±5% tolerance surface-mount Zener diode in the Powermite® package, rated for 3.0 W DC power dissipation at TAB 1 = 60°C, with 140 Ω dynamic impedance at 5.0 mA test current and 2000 µA max reverse leakage at 56 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails of industrial control modules.
For engineers reviewing the 1PMT5946BE3/TR7 datasheet, 1PMT5946BE3/TR7 pinout, 1PMT5946BE3/TR7 application, or 1PMT5946BE3/TR7 equivalent, key selection criteria include its 75 V nominal Zener voltage, 3.0 W thermal capability with metallic-tab heat sinking, DO-216 mechanical outline, and ESD rating >16 kV HBM - all critical for ruggedized power management designs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage regulation under varying load and temperature conditions. Its Powermite® package features a full metallic bottom (TAB 1) acting as both cathode terminal and primary thermal path, with thermal resistance of 30°C/W junction-to-TAB1.
The device exhibits low knee impedance (ZZK = 0.25 Ω) and tight regulation at IZT = 5.0 mA, with reverse leakage capped at 2000 µA at VR = 56 V. It is specified across -55°C to +150°C junction temperature range and compatible with EIA-481 tape-and-reel automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V ±5% at IZT = 5.0 mA - defines regulated output voltage under nominal bias |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum continuous DC power handling with tab heatsinking |
| Dynamic Impedance (ZZT) | 140 Ω at IZT = 5.0 mA - determines voltage deviation under small-signal AC load variations |
| Reverse Leakage (IR) | 2000 µA max at VR = 56 V - limits standby current in clamping or reference circuits |
| Thermal Resistance | 30°C/W junction-to-TAB1 - quantifies thermal performance when mounted to PCB copper pour |
| ESD Rating | >16 kV per Human Body Model - ensures robustness during handling and board assembly |
| Junction Temp Range | -55°C to +150°C - supports operation in extended-temperature industrial and automotive under-hood environments |
Pinout & Package
Package: Powermite® (DO-216AA), molded surface-mount package with full metallic bottom (TAB 1) serving as cathode and thermal interface. Cathode polarity is designated by TAB 1; mounting orientation is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary current return path and main thermal conduction surface to PCB |
| Lead 2 | Anode | Signal input terminal; reverse-biased connection point for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Integral heat sink locking tab | Mechanical tab enhances thermal transfer from junction to PCB while securing component during reflow |
| Full metallic bottom | Eliminates solder flux entrapment risk and improves thermal reliability vs. plastic-bottom SMD packages |
| Automated insertion compatibility | DO-216 footprint and tape-and-reel packaging support high-speed pick-and-place placement |
| Tight voltage tolerance option | ±2% (suffix C) and ±1% (suffix D) variants available for precision reference applications |
Applications
| Industrial Power Supply Clamp | Automotive ECU Voltage Reference |
|---|---|
Use Scenario: Clamping transient overvoltage on 24 V DC bus in programmable logic controller (PLC) backplane. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to limit rail voltage to 75 V during load dump events. Use Value: 3.0 W power rating and 30°C/W thermal resistance enable sustained clamping without thermal runaway under repeated transients. | Use Scenario: Providing stable 75 V reference for analog sensor signal conditioning in engine control unit (ECU) power domain. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC biasing and comparator threshold setting. Use Value: ±5% VZ tolerance and low 2000 µA leakage at 56 V ensure predictable reference stability across -40°C to +125°C ambient. |
| Telecom DC-DC Converter Feedback | Medical Equipment Overvoltage Protection |
Use Scenario: Secondary-side voltage sensing node in isolated 48 V telecom DC-DC converter using optocoupler feedback. IC Role / Device Role / Timing Role: Zener element in shunt regulator circuit defining output voltage setpoint. Use Value: 140 Ω dynamic impedance minimizes output voltage drift under line/load regulation changes in closed-loop control. | Use Scenario: Input-stage overvoltage protection for battery-powered portable diagnostic equipment accepting wide-range DC input. IC Role / Device Role / Timing Role: Standby-mode clamping device limiting input rail to safe level during surge events. Use Value: >16 kV HBM ESD rating prevents latent damage during field service and reduces need for external TVS staging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ75A | TVS diode (not Zener); 75 V standoff, 1500 W peak pulse power, unidirectional | Designed for transient suppression, not precision DC regulation | Select only for surge-only protection; not suitable as voltage reference |
| BZX84-C75 | SOT-23 package; 75 V ±5%, 300 mW power, 100 Ω ZZT, no metallic thermal tab | Limited thermal capacity and no integrated heatsink tab | Use where space-constrained and power < 0.3 W; avoid in 3 W continuous clamp roles |
Compared with SMCJ75A and BZX84-C75, the 1PMT5946BE3/TR7 uniquely combines 3.0 W DC power handling, DO-216 mechanical robustness, and metallic-tab thermal conduction - making it the only choice among the three for sustained Zener regulation in thermally demanding industrial power stages.
Availability
1PMT5946BE3/TR7 is available at Aetrix Electronics and suitable for industrial power supply clamp, automotive ECU voltage reference, and telecom DC-DC converter feedback requiring stable component supply and long-term production continuity.
Supply support for 1PMT5946BE3/TR7 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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The Powermite® Zener diode family, including the 1PMT5946BE3/TR7, was engineered for high-power surface-mount voltage regulation in space-constrained, thermally aggressive environments such as motor drives and power conversion systems.
FAQ
What is the Zener voltage tolerance for 1PMT5946BE3/TR7?
The 1PMT5946BE3/TR7 has a standard Zener voltage tolerance of ±5% at 75 V nominal, measured at IZT = 5.0 mA and TAB 1 temperature of 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but those are distinct orderable parts - the E3/TR7 variant is strictly ±5%.
How is thermal management implemented in the 1PMT5946BE3/TR7 package?
The 1PMT5946BE3/TR7 uses the Powermite® package with a full metallic bottom (TAB 1) that serves as both cathode terminal and primary thermal conduction path. Its specified thermal resistance is 30°C/W junction-to-TAB1, enabling effective heat transfer to PCB copper when TAB 1 is soldered to an adequate thermal pad.
Can 1PMT5946BE3/TR7 be used in place of through-hole Zener diodes like 1N5364B?
Yes, the 1PMT5946BE3/TR7 provides equivalent 75 V Zener functionality in surface-mount form, but with higher power (3.0 W vs. 5.0 W for 1N5364B) and superior thermal performance due to its metallic-tab construction. However, PCB layout must accommodate the DO-216 footprint and thermal pad - direct replacement requires board redesign.
What is the maximum reverse leakage current for 1PMT5946BE3/TR7 at rated voltage?
The 1PMT5946BE3/TR7 specifies a maximum reverse leakage current of 2000 µA at VR = 56 V (75% of nominal VZ). This value is measured at TL = 30°C and reflects worst-case leakage before breakdown onset - critical for low-power standby circuits where quiescent current matters.
Is 1PMT5946BE3/TR7 compliant with RoHS and REACH requirements?
Yes, the 1PMT5946BE3/TR7 is RoHS-compliant and REACH-conformant, consistent with Microsemi's ISO 9001-certified manufacturing processes documented in MSC0995.PDF Rev F. Lead-free soldering compatibility is confirmed for standard reflow profiles per J-STD-020.
1PMT5946BE3/TR7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-216AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 140 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 56 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-216AA
1PMT5946BE3/TR7 FAQ
1.How can I place an order for 1PMT5946BE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5946BE3/TR7 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 1PMT5946BE3/TR7 reliable?
The price and inventory of 1PMT5946BE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5946BE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5946BE3/TR7?
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4.How is shipping managed for 1PMT5946BE3/TR7?
1PMT5946BE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5946BE3/TR7 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 1PMT5946BE3/TR7?
For technical support, including 1PMT5946BE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5946BE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5946BE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5946BE3/TR7 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 1PMT5946BE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5946BE3/TR7?
All 1PMT5946BE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5946BE3/TR7, 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 1PMT5946BE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5946BE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5946BE3/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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