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Microchip Technology 1PMT5948B/TR7
- Part No.:
- 1PMT5948B/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5948B/TR7.pdf
- Description:
- DIODE ZENER 91V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,036
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Product details
Overview
1PMT5948B/TR7 from Microsemi is a 91 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 200 Ω dynamic impedance at 4.1 mA test current and 3000 µA max reverse leakage at 69.2 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback paths.
For engineers reviewing the 1PMT5948B/TR7 datasheet, 1PMT5948B/TR7 pinout, 1PMT5948B/TR7 application, or 1PMT5948B/TR7 equivalent, key selection criteria include its 91 V nominal Zener voltage, 3.0 W thermal capability with metallic-tab heat sinking, low 200 Ω Zener impedance, ESD rating >16 kV HBM, and DO-216 mechanical outline compatibility with automated SMT placement.
Technical Context
This device operates as a two-terminal voltage-regulating diode with sharp knee characteristics-IZK = 0.25 mA and ZZK = 3000 Ω-enabling stable regulation even at low bias currents. Its full metallic bottom and integral locking tab provide direct thermal conduction to the PCB, yielding 30°C/W junction-to-TAB thermal resistance.
The 1PMT5948B/TR7 is specified under TL = 30°C ambient, with Zener voltage measured 20 seconds after DC current application per Note 1. Dynamic impedance (ZZT) is derived using 60 Hz RMS AC superimposed at 10% of IZT, per Note 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 91 V ±5% at IZT = 4.1 mA - defines clamping threshold in overvoltage protection circuits |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient suppression without external heatsink |
| Dynamic Impedance (ZZT) | 200 Ω at IZT = 4.1 mA - ensures minimal output voltage variation under load current shifts |
| Reverse Leakage (IR) | ≤3000 µA at VR = 69.2 V - guarantees low standby power loss in always-on reference designs |
| Thermal Resistance | 30°C/W junction-to-TAB - allows direct PCB copper pour thermal management for sustained 3 W operation |
| ESD Rating | >16 kV HBM - provides robust handling during automated assembly and field operation |
| Knee Current (IZK) | 0.25 mA - enables functional regulation down to microamp-level biasing in low-power sensing nodes |
Pinout & Package
Package: Powermite® (DO-216), molded surface-mount package with full metallic bottom and integral heat-sink locking tab; cathode designated by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and electrical cathode connection; must be soldered to thermal pad for rated 3.0 W dissipation |
| Lead 2 | Anode | Standard anode terminal; mounted opposite TAB 1 per DO-216 mechanical drawing |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and void-free solder joints |
| Integral heat-sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB copper |
| ESD robustness | >16 kV Human Body Model rating supports handling in unshielded production environments |
| Automated insertion compatibility | DO-216 footprint and tape-and-reel packaging (EIA-481, 3,000 pcs/7″ reel) enable high-speed pick-and-place |
Applications
| Industrial Power Supply Monitoring | Automotive Engine Control Unit (ECU) Reference |
|---|---|
Use Scenario: Monitoring 12 V–24 V battery-derived rails for brownout/overvoltage detection in programmable logic controllers. IC Role / Device Role / Timing Role: Zener diode acting as precision shunt reference for comparator input threshold setting. Use Value: 91 V clamping prevents false triggering during load-dump transients while maintaining tight ±5% tolerance across temperature. | Use Scenario: Providing stable voltage reference for analog sensor signal conditioning in engine knock detection circuitry. IC Role / Device Role / Timing Role: Shunt regulator establishing known bias point for op-amp input stages operating from noisy 5 V or 3.3 V domains. Use Value: Low 0.25 mA knee current enables reliable regulation even with weak pull-up sources common in automotive sensor interfaces. |
| Telecom Line Card Surge Protection | Medical Infusion Pump Power Sequencing |
Use Scenario: Front-end transient voltage suppression on -48 V DC telecom distribution boards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary shunt clamp absorbing energy during fast-rising transients before TVS diodes engage. Use Value: 3.0 W power rating and 30°C/W thermal resistance allow sustained clamping without thermal runaway under repeated surge events. | Use Scenario: Enabling safe power-up sequencing between isolated 24 V main supply and 5 V microcontroller domain in Class II medical devices. IC Role / Device Role / Timing Role: Voltage supervisor reference element ensuring controlled enable timing via resistor-divider network. Use Value: Tight 91 V tolerance and low 200 Ω dynamic impedance ensure predictable turn-on behavior across production lots and temperature range (-55°C to +150°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ91A | TVS diode (unidirectional), 91 V standoff, 1500 W peak pulse power, higher capacitance (~200 pF) | Designed for transient suppression only-not for continuous regulation or reference use | Select when primary need is high-energy surge clamping; not suitable as precision shunt reference |
| BZX84-C91 | SOT-23 package, 300 mW power rating, 91 V ±5%, 600 Ω ZZT at 5 mA | Limited thermal capacity restricts use to low-duty-cycle or low-current reference roles | Select for space-constrained low-power designs where 3.0 W dissipation is unnecessary |
Compared with SMCJ91A and BZX84-C91, the 1PMT5948B/TR7 uniquely combines 3.0 W continuous Zener regulation, DO-216 mechanical robustness, and 200 Ω dynamic impedance-making it optimal for high-reliability, thermally demanding shunt reference and clamping roles where sustained power handling matters.
Availability
1PMT5948B/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive control modules, telecom line cards, and medical device power sequencing requiring stable component supply and long-lifecycle support.
Supply support for 1PMT5948B/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 1PMT5948B/TR7-is engineered for high-power surface-mount voltage regulation in harsh environments, emphasizing thermal performance, mechanical robustness, and ESD resilience.
FAQ
What is the Zener voltage tolerance for 1PMT5948B/TR7?
The 1PMT5948B/TR7 has a standard Zener voltage tolerance of ±5% at 91 V nominal, measured at IZT = 4.1 mA with TAB 1 held at 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D, respectively, but the /TR7 variant corresponds to the standard ±5% version.
How is thermal performance managed in the 1PMT5948B/TR7 package?
The 1PMT5948B/TR7 uses a Powermite® package with a full metallic bottom and integral locking tab that serves as both mechanical anchor and primary thermal path. Its specified 30°C/W junction-to-TAB thermal resistance requires direct soldering of TAB 1 to a copper thermal pad to achieve the full 3.0 W DC power rating at TAB 1 = 60°C.
Can 1PMT5948B/TR7 be used in place of through-hole Zener diodes like 1N5249B?
No-1PMT5948B/TR7 is not a drop-in replacement for 1N5249B. While both are 91 V Zeners, 1PMT5948B/TR7 is a 3.0 W surface-mount device in DO-216 outline with cathode on TAB 1, whereas 1N5249B is a 0.5 W through-hole device in DO-35. Differences in power rating, package, thermal path, and mounting method require PCB redesign and thermal validation before substitution.
What is the maximum reverse leakage current for 1PMT5948B/TR7 at rated conditions?
The maximum reverse leakage current for 1PMT5948B/TR7 is 3000 µA at VR = 69.2 V and TL = 30°C. This value is specified in the Electrical Characteristics table and reflects worst-case leakage under defined test conditions-not typical operation-and remains stable across the full -55°C to +150°C junction temperature range.
Is tape-and-reel packaging available for 1PMT5948B/TR7, and what are the reel specifications?
Yes-1PMT5948B/TR7 is supplied in EIA Standard 481 tape-and-reel format. The /TR7 suffix indicates 7-inch reels containing 3,000 units. Reels comply with industry-standard pocket pitch, cover tape tension, and orientation requirements for compatibility with high-speed SMT placement equipment.
1PMT5948B/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):
- 91 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 69.2 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
1PMT5948B/TR7 FAQ
1.How can I place an order for 1PMT5948B/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5948B/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 1PMT5948B/TR7 reliable?
The price and inventory of 1PMT5948B/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5948B/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5948B/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5948B/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5948B/TR7?
1PMT5948B/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5948B/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 1PMT5948B/TR7?
For technical support, including 1PMT5948B/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5948B/TR7 requirements.
6.How does Aetrix verify that 1PMT5948B/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5948B/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 1PMT5948B/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5948B/TR7?
All 1PMT5948B/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5948B/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 1PMT5948B/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5948B/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5948B/TR7 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
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
onsemi
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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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