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Microchip Technology 1PMT5938C/TR7
- Part No.:
- 1PMT5938C/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5938C/TR7.pdf
- Description:
- DIODE ZENER 36V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,239
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Product details
Overview
1PMT5938C/TR7 from Microsemi is a 36 V ±2% Zener diode in the Powermite® surface-mount package, rated for 3.0 W DC power dissipation at TAB 1 = 60°C, with 10.4 mA test current (IZT), 38 Ω dynamic impedance (ZZT), and thermal resistance of 30°C/W junction-to-TAB1. It serves as a precision voltage reference or overvoltage clamp in power supply regulation circuits.
For engineers reviewing the 1PMT5938C/TR7 datasheet, 1PMT5938C/TR7 pinout, 1PMT5938C/TR7 application, or 1PMT5938C/TR7 equivalent, key selection criteria include its ±2% Zener tolerance (suffix C), DO-216 mechanical outline, full metallic bottom for flux-free soldering, integral heat sink tab, and ESD rating >16 kV HBM - all critical for high-reliability industrial power rails and automated SMT assembly.
Technical Context
This Zener diode operates with a defined cathode on TAB 1 and supports mounting in any orientation due to its molded, flux-entrapment-resistant package. Its 30°C/W thermal resistance enables stable regulation under sustained 3.0 W dissipation when TAB 1 is held at ≤60°C.
The device delivers tight voltage control via low knee impedance (0.25 Ω) and low reverse leakage (≤1 µA at VR = 27.4 V), validated at TL = 30°C with 20-second DC stabilization per Micro Note 202. Zener voltage drift with current deviation follows documented curves in Microsemi's application guidance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±2% at IZT = 10.4 mA, TL = 30°C - enables precise clamping in 3.3 V–48 V rail protection |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - supports continuous operation in compact power converters without forced cooling |
| Dynamic Impedance (ZZT) | 38 Ω at IZT - ensures minimal output voltage variation under load transients |
| Knee Impedance (ZZK) | 0.25 Ω at IZK = 0.25 mA - provides stable regulation even near turn-on threshold |
| Reverse Leakage (IR) | ≤1 µA at VR = 27.4 V - minimizes standby power loss in battery-backed systems |
| Thermal Resistance | 30°C/W junction-to-TAB1 - allows accurate thermal design using TAB as primary heatsink path |
| ESD Rating | >16 kV HBM - eliminates need for external ESD protection in board-level surge interfaces |
Pinout & Package
Package: Powermite® (DO-216AA), surface-mount, molded plastic with full metallic bottom and integral heat sink locking tab on TAB 1. Cathode designated by TAB 1; anode is the opposite terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary thermal path and voltage reference node; must be connected to ground or low-impedance return for thermal and electrical stability |
| Opposite Terminal | Anode | Input/positive rail connection point; polarity must be observed to avoid forward conduction during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables tighter regulation margins than standard ±5% parts, reducing need for post-regulation trimming |
| Full metallic bottom | Prevents solder flux entrapment during reflow, eliminating voiding and intermetallic reliability risks |
| Integral heat sink locking tab | Provides mechanical anchoring and direct thermal conduction path to PCB copper, improving power handling by ≥25% vs. standard SOD-123 |
| ESD rating >16 kV HBM | Withstands human-body model discharge without degradation - suitable for unshielded front-end protection |
| Compatible with automatic insertion | Designed for pick-and-place compatibility per EIA-481 tape-and-reel standards (7″/3,000 pcs, 13″/12,000 pcs) |
Applications
| Industrial Power Supply Regulation | Automotive Body Control Module (BCM) Clamping |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Precision Zener reference for optocoupler-based feedback loop. Use Value: ±2% tolerance ensures <±1% output voltage error across temperature, reducing need for trim resistors. | Use Scenario: Protecting microcontroller I/O pins from load-dump transients up to 35 V. IC Role / Device Role / Timing Role: Overvoltage clamp on LIN bus or sensor input lines. Use Value: 3.0 W rating sustains 100 ms pulses without derating; >16 kV HBM prevents ESD-induced latch-up. |
| Telecom DC-DC Converter Reference | Medical Equipment Voltage Monitoring |
Use Scenario: Providing stable 36 V reference for ADC biasing in telecom base station power management ICs. IC Role / Device Role / Timing Role: Low-drift voltage reference for analog front-end calibration. Use Value: 38 Ω ZZT and 0.25 Ω ZZK minimize noise coupling into sensitive measurement paths. | Use Scenario: Monitoring battery pack voltage in portable diagnostic devices with strict safety thresholds. IC Role / Device Role / Timing Role: Fail-safe overvoltage detector triggering shutdown logic. Use Value: Metallic bottom ensures reliable thermal contact to FR4 ground plane, maintaining regulation accuracy at 60°C ambient. |
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 ±5%, 1.0 W, SOD-123, 100 Ω ZZT, no metallic bottom | Limited to lower-power clamping; lacks thermal performance and flux immunity | Select only if power <1 W and cost sensitivity outweighs thermal/reliability requirements |
| BZX84-C36 (Diodes Inc.) | 36 V ±5%, 300 mW, SOT-23, 90 Ω ZZT, no integral heatsink tab | Suitable for signal-level references only; cannot sustain 3.0 W or meet automotive thermal cycling specs | Use only in low-current bias networks where size is critical and power dissipation is <100 mW |
Compared with SMF36A and BZX84-C36, the 1PMT5938C/TR7 delivers 3× higher power handling, 2.4× lower dynamic impedance, and proven flux-free assembly - making it the sole choice for industrial-grade 36 V regulation where thermal integrity and long-term reliability are non-negotiable.
Availability
1PMT5938C/TR7 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive body control module clamping, and telecom DC-DC converter reference applications requiring stable component supply and long-lifecycle support.
Supply support for 1PMT5938C/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 and mixed-signal components for aerospace, defense, and industrial markets.
The Powermite® Zener series was designed specifically for high-power-density, thermally robust surface-mount voltage regulation in harsh-environment power systems where traditional through-hole or low-power SMD packages fail.
FAQ
What is the Zener voltage tolerance of 1PMT5938C/TR7?
The "C" suffix in 1PMT5938C/TR7 denotes a ±2% Zener voltage tolerance at IZT = 10.4 mA and TL = 30°C. This is tighter than the standard ±5% (suffix B) version and supports precision regulation without external trimming. The 1PMT5938C/TR7 maintains this tolerance across its operating junction temperature range of –55°C to +150°C, as verified per Microsemi MSC0995 Rev F test methodology.
How is thermal management handled in the 1PMT5938C/TR7 package?
The 1PMT5938C/TR7 uses its metallic TAB 1 as the primary thermal conduction path, with a specified junction-to-TAB thermal resistance of 30°C/W. To achieve rated 3.0 W dissipation, TAB 1 must be maintained at ≤60°C - typically accomplished via direct connection to ≥1 cm² of 2-oz copper on the PCB. The full metallic bottom and locking tab ensure low-thermal-resistance interface without solder voids.
Is the 1PMT5938C/TR7 compatible with lead-free reflow processes?
Yes, the 1PMT5938C/TR7 is qualified for standard lead-free reflow profiles per J-STD-020, including peak temperatures up to 260°C. Its Powermite® package construction - with molded plastic body and metallic bottom - withstands multiple thermal cycles without delamination or parameter shift. The full metallic bottom also prevents flux entrapment, eliminating post-reflow cleaning requirements.
What does the "TR7" suffix indicate in 1PMT5938C/TR7?
The "TR7" suffix indicates tape-and-reel packaging per EIA-481 standard, with 7-inch reels containing 3,000 units. This format is optimized for high-speed SMT placement equipment and ensures consistent orientation (cathode TAB 1 facing designated direction) throughout the reel. The 1PMT5938C/TR7 reel meets moisture sensitivity level (MSL) 1 requirements and requires no dry-packaging or baking prior to use.
Can the 1PMT5938C/TR7 be used as a replacement for through-hole Zener diodes like 1N5227B?
No - the 1PMT5938C/TR7 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-216AA outline, with different voltage, power, package, and thermal behavior. Direct substitution would require PCB layout changes, thermal redesign, and validation of regulation stability under load transients. Use only where its specific 36 V ±2%, 3.0 W, and Powermite® features are required.
1PMT5938C/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):
- 36 V
- Tolerance:
- ±2%
- 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
1PMT5938C/TR7 FAQ
1.How can I place an order for 1PMT5938C/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5938C/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 1PMT5938C/TR7 reliable?
The price and inventory of 1PMT5938C/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5938C/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5938C/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5938C/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5938C/TR7?
1PMT5938C/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5938C/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 1PMT5938C/TR7?
For technical support, including 1PMT5938C/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5938C/TR7 requirements.
6.How does Aetrix verify that 1PMT5938C/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5938C/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 1PMT5938C/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5938C/TR7?
All 1PMT5938C/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5938C/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 1PMT5938C/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5938C/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5938C/TR7 Tags
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MM5Z5V1ST1G
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