My Inquiry
My Account
Microchip Technology 1PMT5942BE3/TR7
- Part No.:
- 1PMT5942BE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5942BE3/TR7.pdf
- Description:
- DIODE ZENER 51V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,741
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1PMT5942BE3/TR7 from Microsemi is a 51 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 70 Ω dynamic impedance at 7.3 mA test current and 1100 µA max reverse leakage at 38.8 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback paths.
For engineers reviewing the 1PMT5942BE3/TR7 datasheet, 1PMT5942BE3/TR7 pinout, 1PMT5942BE3/TR7 application, or 1PMT5942BE3/TR7 equivalent, key selection criteria include its 51 V nominal Zener voltage, 3.0 W thermal capability via metallic tab, DO-216 mechanical outline, ESD rating >16 kV HBM, and compatibility with automated SMT placement equipment.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage under varying load or line conditions. Its Powermite® package integrates a full metallic bottom (TAB 1) as both cathode terminal and primary heat path, with thermal resistance of 30°C/W junction-to-TAB1.
The device exhibits low knee impedance (≤400 Ω at IZK = 0.25 mA) and tight regulation across temperature (–55°C to +150°C junction range), supporting reliable clamping in industrial power supplies and automotive subsystems where transient suppression and reference stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51 V ±5% at IZT = 7.3 mA - defines precise clamping threshold for overvoltage protection circuits |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient absorption without external heatsink |
| Dynamic Impedance (ZZT) | 70 Ω at IZT = 7.3 mA - ensures minimal voltage shift under moderate current variation |
| Reverse Leakage (IR) | 1100 µA max at VR = 38.8 V - guarantees low standby power loss in always-on monitoring circuits |
| Thermal Resistance | 30°C/W junction-to-TAB1 - allows direct thermal coupling to PCB copper pour or chassis for passive cooling |
| ESD Rating | >16 kV per Human Body Model - provides robust handling and system-level ESD immunity without added protection devices |
Pinout & Package
Package: Powermite® (DO-216AA), molded surface-mount package with full metallic bottom (TAB 1) acting as cathode and primary thermal interface. Dimensions conform to DO-216 mechanical outline (all dimensions ±0.005 inch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary current return path and thermal conduction surface - must be soldered to ≥1 cm² copper area for rated 3.0 W operation |
| Lead 2 | Anode | Signal-side connection point - routed with minimal trace length to reduce parasitic inductance in fast transient clamping |
Key Features
| Feature | Design Value |
|---|---|
| Integral heat sink locking tab | Mechanical tab on TAB 1 enhances thermal contact and prevents lift-off during reflow, enabling consistent 3.0 W derating |
| Full metallic bottom | Eliminates solder flux entrapment risk during assembly - improves long-term reliability in high-humidity environments |
| Automated insertion compatibility | DO-216 footprint and tape-and-reel packaging (EIA-481, 7″/3,000 pcs) support high-speed pick-and-place at ≥25,000 UPH |
| Tight voltage tolerance option | Available in ±2% (suffix C) and ±1% (suffix D) - supports precision feedback loops in isolated DC-DC converters |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Clamping 48 V intermediate bus transients caused by load dump or relay switching in programmable logic controllers. IC Role / Device Role / Timing Role: Zener diode providing fast-response overvoltage protection at input stage of DC-DC converter. Use Value: 51 V clamping threshold aligns with ISO 7637-2 Pulse 5a requirements; 3.0 W rating absorbs 100 ms surges without degradation. | Use Scenario: Voltage reference for microcontroller ADC biasing in rear lighting control units exposed to 12 V battery fluctuations. IC Role / Device Role / Timing Role: Precision shunt reference stabilizing 5 V LDO feedback node against battery ripple and cold-crank dips. Use Value: ±5% VZ tolerance and <70 Ω ZZT ensure ADC reference drift remains <0.5% over –40°C to +125°C ambient. |
| Telecom Line Card Surge Suppression | Medical Infusion Pump Power Monitoring |
Use Scenario: Secondary surge clamp on -48 V telecom backplane, downstream of primary GDT-based protection. IC Role / Device Role / Timing Role: Fast-reacting Zener limiting residual voltage spikes to protect ASIC I/O pins. Use Value: >16 kV HBM ESD rating eliminates need for additional TVS diodes; DO-216 footprint saves board space vs. SMA packages. | Use Scenario: Overvoltage detection circuit triggering shutdown when main 24 V supply exceeds safe limit during motor stall events. IC Role / Device Role / Timing Role: Threshold detector element interfacing with comparator input to initiate fault response within 10 µs. Use Value: Low 1100 µA IR at 38.8 V ensures negligible quiescent current draw in battery-backed safety circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ51A | TVS diode (unidirectional), 51 V standoff, 600 W peak pulse power, higher capacitance (~200 pF) | Designed for high-energy surge suppression (IEC 61000-4-5), not precision regulation | Select for lightning-induced transients; avoid where low leakage or tight DC regulation is required |
| BZX84-C51 | SOT-23 Zener, 51 V ±5%, 300 mW PD, 300 Ω ZZT, no integral heatsink | Limited to low-power signal-level clamping; unsuitable for >100 mA continuous current | Select for cost-sensitive, space-constrained logic-level protection; not for 3.0 W power rail clamping |
Compared with SMCJ51A and BZX84-C51, the 1PMT5942BE3/TR7 uniquely delivers 3.0 W DC power handling in a surface-mount package with metallic thermal path, making it suitable for sustained overvoltage clamping where both precision and power endurance are required.
Availability
1PMT5942BE3/TR7 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, telecom line card surge suppression, and medical infusion pump power monitoring requiring stable component supply across extended production lifecycles.
Supply support for 1PMT5942BE3/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 semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The Powermite® Zener diode product line was designed to deliver high-power, surface-mount voltage regulation in compact form factors-targeting applications where thermal performance, automated assembly, and rugged environmental operation are essential.
FAQ
What is the Zener voltage tolerance for 1PMT5942BE3/TR7?
The 1PMT5942BE3/TR7 has a standard Zener voltage tolerance of ±5% at 51 V, measured at IZT = 7.3 mA with TAB 1 held at 30°C. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available upon request but are not applicable to the E3/TR7 variant.
How is thermal management implemented for 1PMT5942BE3/TR7 in high-power operation?
The 1PMT5942BE3/TR7 uses TAB 1 as both cathode and primary thermal interface, with a specified junction-to-TAB thermal resistance of 30°C/W. To achieve full 3.0 W rating, TAB 1 must be soldered to ≥1 cm² of 2 oz copper on the PCB, and ambient temperature at the tab must not exceed 60°C.
Does 1PMT5942BE3/TR7 meet automotive qualification standards?
The 1PMT5942BE3/TR7 is not AEC-Q200 qualified, but its operating junction temperature range (–55°C to +150°C), >16 kV HBM ESD rating, and robust Powermite® package make it suitable for non-safety-critical automotive applications such as body control modules and lighting drivers when validated per customer-specific stress testing.
What is the maximum reverse leakage current for 1PMT5942BE3/TR7 at rated voltage?
At VR = 38.8 V (76% of nominal 51 V), the 1PMT5942BE3/TR7 exhibits a maximum reverse leakage current of 1100 µA. This value is guaranteed across the full operating temperature range and supports low-quiescent-current designs in always-on monitoring circuits.
Is 1PMT5942BE3/TR7 compatible with lead-free reflow processes?
Yes, the 1PMT5942BE3/TR7 is rated for standard lead-free reflow profiles (JEDEC J-STD-020), including peak temperatures up to 260°C for ≤60 seconds. Its molded Powermite® package and metallic tab construction ensure mechanical integrity and solder joint reliability under repeated thermal cycling.
1PMT5942BE3/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):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 38.8 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
1PMT5942BE3/TR7 FAQ
1.How can I place an order for 1PMT5942BE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5942BE3/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 1PMT5942BE3/TR7 reliable?
The price and inventory of 1PMT5942BE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5942BE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5942BE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5942BE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5942BE3/TR7?
1PMT5942BE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5942BE3/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 1PMT5942BE3/TR7?
For technical support, including 1PMT5942BE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5942BE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5942BE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5942BE3/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 1PMT5942BE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5942BE3/TR7?
All 1PMT5942BE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5942BE3/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 1PMT5942BE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5942BE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5942BE3/TR7 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
