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Microchip Technology 1PMT5938B/TR13
- Part No.:
- 1PMT5938B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5938B/TR13.pdf
- Description:
- DIODE ZENER 36V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,046
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Product details
Overview
1PMT5938B/TR13 from Microsemi is a 36 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 10.4 mA test current, 38 Ω dynamic impedance, and 1 µA max reverse leakage at 27.4 V. It serves as a precision voltage reference or overvoltage clamp in compact DC power rails and regulator feedback networks.
For engineers reviewing the 1PMT5938B/TR13 datasheet, 1PMT5938B/TR13 pinout, 1PMT5938B/TR13 application, or 1PMT5938B/TR13 equivalent, key selection criteria include its 36 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 assembly.
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 full metallic bottom and locking tab to ensure low thermal resistance (30°C/W junction-to-TAB1) and reliable heat transfer during sustained 3.0 W operation.
The device exhibits low knee impedance (0.25 Ω) and stable reverse characteristics down to 1 µA leakage at 27.4 V, enabling accurate clamping in low-current sensing and protection circuits. Its DO-216 outline and cathode designation by TAB 1 define unambiguous mounting and polarity orientation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 36 V ±5% at 10.4 mA - defines precise clamping threshold for 3.3–5 V logic supply protection or reference generation |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables robust transient suppression without external heatsink in space-constrained PCBs |
| Dynamic Impedance | 38 Ω at 10.4 mA - ensures minimal voltage shift under load variation in feedback loops |
| Reverse Leakage | ≤1 µA at 27.4 V - guarantees low standby current in battery-powered voltage monitor circuits |
| Thermal Resistance | 30°C/W junction-to-TAB1 - supports continuous operation up to +150°C junction temperature with proper board copper area |
| ESD Rating | >16 kV HBM - provides inherent system-level ESD immunity without additional TVS staging |
| Package Outline | DO-216 - standardized SMT footprint compatible with pick-and-place equipment and IPC-7351 land patterns |
Pinout & Package
Powermite® package: molded surface-mount housing with full metallic bottom and integral heat-sink locking tab; cathode designated by TAB 1; weight ≈ 0.016 g; operating junction/storage temperature −55°C to +150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and electrical connection point - must be soldered to thermal pad for rated 3.0 W dissipation |
| Lead 2 | Anode | Standard anode terminal - connects to ground or lower-potential node in clamping configuration |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term solder joint reliability and thermal interface consistency |
| Integral heat-sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB copper, reducing thermal resistance to 30°C/W |
| Automated insertion compatibility | DO-216 outline and tape-and-reel packaging (EIA-481, 13-inch reel: 12,000 pcs) support high-speed SMT placement |
| High ESD immunity | >16 kV per Human Body Model - reduces need for external ESD protection in I/O and sensor interface designs |
Applications
| DC Power Rail Clamping | Feedback Reference for SMPS |
|---|---|
Use Scenario: Protecting 3.3 V or 5 V microcontroller I/O lines from ESD or inductive transients in industrial control modules. IC Role / Device Role / Timing Role: Zener clamping diode placed between signal line and ground, conducting above 36 V to shunt surge energy. Use Value: Leverages 3.0 W rating and 1 µA leakage to absorb repetitive 10–100 ns transients without degradation, eliminating need for larger discrete TVS devices. | Use Scenario: Providing stable voltage reference for optocoupler feedback in isolated flyback converters delivering 24 V output. IC Role / Device Role / Timing Role: Zener referenced to secondary-side ground, setting error amplifier threshold in TL431-like topology. Use Value: 36 V nominal voltage and 38 Ω dynamic impedance maintain tight regulation across 5–20 mA load variation, improving output accuracy to ±1.5%. |
| Low-Power Sensor Biasing | Overvoltage Detection Threshold |
Use Scenario: Generating a stable bias voltage for analog front-end op-amps in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Zener used as shunt reference in ultra-low-quiescent LDO pre-regulator stage. Use Value: 1 µA reverse leakage at 27.4 V ensures sub-1 µA total quiescent draw, extending coin-cell life beyond 5 years in sleep-mode operation. | Use Scenario: Triggering shutdown logic when input bus exceeds safe limit in 24 V automotive body control modules. IC Role / Device Role / Timing Role: Zener anode tied to monitored rail, cathode driving comparator input via resistor divider. Use Value: ±5% tolerance and 0.25 Ω knee impedance enable repeatable 34.2–37.8 V trip window with <100 mV hysteresis, meeting ISO 16750-2 pulse 4 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF36A (ON Semiconductor) | 36 V, 200 W peak power, DO-219AB package, 1.5 Ω dynamic impedance, 100 ns response | Designed for high-energy transient suppression (IEC 61000-4-5), not precision regulation | Select for surge protection where clamping speed and peak power dominate; avoid for reference use due to higher ZZT and wider tolerance |
| BZX84-C36 (Diodes Inc.) | 36 V, ±5%, SOT-23, 300 mW, 50 Ω dynamic impedance, 100 nA leakage at 28.8 V | Lower power, smaller footprint, higher ZZT, optimized for low-cost consumer electronics | Select for cost-sensitive, low-power applications where 3.0 W capability is unnecessary; verify thermal margin on thin PCBs |
Compared with SMF36A and BZX84-C36, the 1PMT5938B/TR13 uniquely balances 3.0 W continuous dissipation, 38 Ω regulation stability, and DO-216 manufacturability-making it optimal for industrial power management where both precision and ruggedness are required.
Availability
1PMT5938B/TR13 is available at Aetrix Electronics and suitable for DC power rail clamping, SMPS feedback referencing, low-power sensor biasing, and overvoltage detection requiring stable component supply across automotive, industrial, and medical electronics programs.
Supply support for 1PMT5938B/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 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 series-including 1PMT5938B/TR13-is engineered for high-power-density voltage regulation in harsh-environment systems where thermal performance, ESD robustness, and automated assembly compatibility are critical.
FAQ
What is the Zener voltage tolerance for 1PMT5938B/TR13?
The 1PMT5938B/TR13 has a standard Zener voltage tolerance of ±5% at 36 V nominal, measured at 10.4 mA test current 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 base 1PMT5938B/TR13 ordering code.
How is thermal performance defined for 1PMT5938B/TR13?
The 1PMT5938B/TR13 achieves 3.0 W DC power dissipation only when TAB 1 is maintained at ≤60°C. Its junction-to-TAB1 thermal resistance is 30°C/W, meaning a 30°C temperature rise occurs per watt dissipated. Effective PCB copper area under TAB 1 is essential to meet this rating in real-world layouts.
Is 1PMT5938B/TR13 compatible with lead-free reflow processes?
Yes, the 1PMT5938B/TR13 Powermite® package is qualified for standard lead-free reflow profiles per J-STD-020, including peak temperatures up to 260°C. Its full metallic bottom and molded construction prevent delamination or flux entrapment, ensuring consistent solder joint integrity across automated assembly lines.
What does the "TR13" suffix indicate in 1PMT5938B/TR13?
The "TR13" suffix denotes tape-and-reel packaging per EIA-481 standard on a 13-inch reel containing 12,000 units. This format is optimized for high-volume SMT placement equipment and ensures consistent orientation (cathode TAB 1 leading) during automated feeding and placement of the 1PMT5938B/TR13.
Can 1PMT5938B/TR13 be used as a replacement for through-hole Zeners like 1N5227B?
No-1PMT5938B/TR13 is not a drop-in replacement for 1N5227B (3.3 V, 500 mW). It is a 36 V, 3.0 W surface-mount device in DO-216 outline. Substitution requires full validation of voltage rating, power handling, thermal layout, and PCB footprint; no pin-compatible or functional equivalence exists between these families.
1PMT5938B/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):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 38 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 27.4 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
1PMT5938B/TR13 FAQ
1.How can I place an order for 1PMT5938B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5938B/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 1PMT5938B/TR13 reliable?
The price and inventory of 1PMT5938B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5938B/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5938B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5938B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5938B/TR13?
1PMT5938B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5938B/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 1PMT5938B/TR13?
For technical support, including 1PMT5938B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5938B/TR13 requirements.
6.How does Aetrix verify that 1PMT5938B/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5938B/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 1PMT5938B/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5938B/TR13?
All 1PMT5938B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5938B/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 1PMT5938B/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5938B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5938B/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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