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Microchip Technology 1PMT5948B/TR13
- Part No.:
- 1PMT5948B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5948B/TR13.pdf
- Description:
- DIODE ZENER 91V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,526
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Product details
Overview
1PMT5948B/TR13 from Microsemi is a 3.0 W surface-mount Zener diode in the Powermite® package, with nominal zener voltage 91 V ±5%, test current 4.1 mA, dynamic impedance 200 Ω, and thermal resistance 30°C/W junction-to-tab. It serves as a precision voltage reference or overvoltage clamp in power supply regulation and transient protection circuits.
For engineers reviewing the 1PMT5948B/TR13 datasheet, 1PMT5948B/TR13 pinout, 1PMT5948B/TR13 application, or 1PMT5948B/TR13 equivalent, key selection factors include its 91 V zener voltage, 3.0 W power dissipation at tab temperature ≤60°C, DO-216 mechanical outline, full metallic bottom for flux-free soldering, and ESD rating >16 kV HBM.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range. Its Powermite® package integrates a locking tab that functions as both mechanical anchor and thermal path to PCB copper, enabling efficient heat transfer from junction to tab (30°C/W).
The device exhibits low reverse leakage (≤1 µA at VR = 69.2 V), defined knee characteristics (IZK = 0.25 mA, ZZK = 3000 Ω), and stable performance across -55°C to +150°C junction temperature range-making it suitable for industrial and automotive environments where thermal reliability is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 91 V ±5% at IZT = 4.1 mA - defines regulated output voltage under nominal bias |
| Power Dissipation | 3.0 W at TAB1 = 60°C - maximum continuous power before thermal derating begins |
| Dynamic Impedance (ZZT) | 200 Ω at IZT - indicates voltage stability under small-signal AC variations |
| Knee Impedance (ZZK) | 3000 Ω at IZK = 0.25 mA - characterizes regulation onset near minimum operating current |
| Reverse Leakage (IR) | ≤1 µA at VR = 69.2 V - ensures minimal standby current in clamping or reference use |
| Thermal Resistance | 30°C/W junction-to-TAB1 - quantifies thermal path efficiency to PCB heatsink area |
| ESD Rating | >16 kV per HBM - supports robust handling during automated assembly and field operation |
Pinout & Package
The 1PMT5948B/TR13 uses a 2-terminal DO-216 molded surface-mount package with full metallic bottom and integral locking tab. Cathode is designated by TAB 1; anode is the opposite end. Mounting orientation is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat sink interface and voltage reference node; must be connected to low-impedance ground or return plane |
| Opposite End | Anode | Current entry point during reverse-bias operation; connects to unregulated input or transient source |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term solder joint integrity and process yield |
| Integral locking tab | Acts as mechanical anchor and thermal conduction path-reduces thermal resistance by direct metal-to-PCB contact |
| DO-216 mechanical outline | Enables compatibility with standard SMT pick-and-place equipment and EIA-481 tape-and-reel packaging (7″/13″ reels) |
| ESD robustness | >16 kV HBM rating allows safe handling without special ESD controls in production and field service |
Applications
| Switch-Mode Power Supply Feedback | Industrial Motor Drive Overvoltage Clamp |
|---|---|
Use Scenario: Regulates feedback voltage in isolated flyback converters using optocoupler-coupled secondary-side sensing. IC Role / Device Role / Timing Role: Precision voltage reference establishing 91 V threshold for error amplifier comparison. Use Value: Maintains ±5% output regulation across line/load/temperature with minimal drift due to tight VZ tolerance and low ZZT. | Use Scenario: Clamps DC bus overvoltage transients caused by regenerative braking in 3-phase inverters. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting excess energy to ground when bus exceeds 91 V. Use Value: Absorbs up to 3.0 W continuously at tab temperature ≤60°C, preventing IGBT failure without external heatsink. |
| Automotive Body Control Module Reference | Telecom Line Card Surge Protection |
Use Scenario: Provides stable 91 V reference for microcontroller ADC monitoring of 12 V/24 V battery-derived rails. IC Role / Device Role / Timing Role: Low-leakage (<1 µA) Zener reference ensuring accurate voltage scaling over -40°C to +125°C ambient. Use Value: Enables reliable battery health diagnostics without loading sensitive sensor supplies. | Use Scenario: Protects Ethernet PHY interfaces from lightning-induced surges on PoE-powered line cards. IC Role / Device Role / Timing Role: Primary shunt clamp triggered at 91 V to limit transient voltage before TVS diode activation. Use Value: Extends system-level surge withstand capability by absorbing initial high-energy pulse with 30°C/W thermal path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5948BTR | Same 91 V zener voltage and ±5% tolerance, but in DO-41 through-hole package; no metallic bottom or locking tab | Lacks thermal performance (higher RθJA); unsuitable for high-density SMT layouts requiring flux-free assembly | Choose only if legacy through-hole design or manual assembly is required |
| BZX84-C91 | 91 V zener in SOT-23; rated 300 mW only; dynamic impedance ~500 Ω; no thermal tab | Inadequate for >300 mW clamping; cannot replace 1PMT5948B/TR13 in 3 W applications without redesign | Select only for low-power signal-level referencing-not for power rail protection |
Compared with 1N5948BTR and BZX84-C91, the 1PMT5948B/TR13 delivers unique 3.0 W SMT capability with integrated thermal management and flux-free assembly-enabling compact, high-reliability power regulation where thermal and process constraints rule out alternatives.
Availability
1PMT5948B/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial motor drives, automotive body control modules, and telecom line card surge protection requiring stable component supply and consistent parametric performance.
Supply support for 1PMT5948B/TR13 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 manufacturer specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The Powermite® Zener diode product line-including 1PMT5948B/TR13-is engineered for high-power surface-mount voltage regulation and transient suppression in space-constrained, thermally demanding applications.
FAQ
What is the zener voltage tolerance for 1PMT5948B/TR13?
The 1PMT5948B/TR13 has a standard zener voltage tolerance of ±5% at 91 V, measured at 4.1 mA test current and tab temperature of 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the base part number 1PMT5948B/TR13 specifies ±5%.
Can 1PMT5948B/TR13 be used in place of a through-hole Zener like 1N5948B?
No-1PMT5948B/TR13 is not a drop-in replacement for 1N5948B due to different packages (DO-216 vs. DO-41), thermal paths, and mounting methods. While both share 91 V zener voltage, the 1PMT5948B/TR13 requires SMT layout with thermal pad connection to TAB 1, unlike the axial-lead 1N5948B.
What is the maximum reverse voltage (VR) that 1PMT5948B/TR13 can block before breakdown?
The 1PMT5948B/TR13 is rated for a maximum reverse voltage (VR) of 69.2 V, at which reverse leakage remains ≤1 µA. Breakdown occurs at the nominal zener voltage of 91 V under specified test conditions (IZT = 4.1 mA). Operation above 69.2 V but below 91 V results in increasing leakage, not regulation.
How does the Powermite® package improve thermal performance of 1PMT5948B/TR13?
The Powermite® package enhances thermal performance of 1PMT5948B/TR13 via its full metallic bottom and integral locking tab (TAB 1), providing a direct thermal path from junction to PCB copper. This achieves a junction-to-tab thermal resistance of 30°C/W-significantly lower than standard SOD-123 or SOT-23 packages-and enables full 3.0 W dissipation at tab temperature ≤60°C.
Is 1PMT5948B/TR13 suitable for automotive applications?
Yes-1PMT5948B/TR13 is qualified for operation across -55°C to +150°C junction temperature and features >16 kV HBM ESD rating, making it suitable for under-hood and body-control module applications. Its robust Powermite® package resists mechanical stress and thermal cycling, supporting AEC-Q200 alignment in customer-qualified designs.
1PMT5948B/TR13 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/TR13 FAQ
1.How can I place an order for 1PMT5948B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5948B/TR13 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/TR13 reliable?
The price and inventory of 1PMT5948B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5948B/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5948B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5948B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5948B/TR13?
1PMT5948B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5948B/TR13 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/TR13?
For technical support, including 1PMT5948B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5948B/TR13 requirements.
6.How does Aetrix verify that 1PMT5948B/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5948B/TR13 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/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5948B/TR13?
All 1PMT5948B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5948B/TR13, 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/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5948B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5948B/TR13 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
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