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Microchip Technology 1N5352B/TR8
- Part No.:
- 1N5352B/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5352B/TR8.pdf
- Description:
- DIODE ZENER 15V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,254
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Product details
Overview
1N5352B/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 15 V, ±5% tolerance (B suffix), 2.5 Ω maximum dynamic impedance at 75 mA test current, and 75 mA maximum regulator current (IZM) when adequately heat-sunk. It operates across –65°C to +150°C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5352B/TR8 datasheet, 1N5352B/TR8 pinout, 1N5352B/TR8 application, or 1N5352B/TR8 equivalent, key selection criteria include its 15 V Zener voltage, 5 W steady-state power rating at lead temperature <25°C, low 0.25 V voltage regulation (ΔVZ), and RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026.
Technical Context
This device functions as a two-terminal voltage reference by operating in reverse breakdown, maintaining stable output voltage across wide current (10–50% IZM) and temperature ranges. Its 25 °C/W junction-to-lead thermal resistance enables reliable 5 W dissipation with 3/8″ (10 mm) lead length from body.
The 1N5352B/TR8 exhibits minimal voltage drift versus current-0.25 V ΔVZ between 10% and 50% of IZM-and withstands non-recurrent 8.3 ms half-sine surge currents up to 6.3 A, supporting robust transient suppression in DC power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V nominal, ±5% tolerance - defines precise regulation point for feedback networks |
| Test Current (IZT) | 75 mA - operating point where VZ and ZZ are specified |
| Dynamic Impedance (ZZ) | 2.5 Ω max at IZT - ensures low voltage variation under load changes |
| Max Regulator Current (IZM) | 75 mA - maximum continuous reverse current before thermal runaway |
| Power Dissipation (PD) | 5.0 W at TL < 25°C - requires adequate heatsinking on leads for full rating |
| Voltage Regulation (ΔVZ) | 0.25 V - difference between VZ measured at 10% and 50% of IZM |
| Surge Current (IZSM) | 6.3 A peak (8.3 ms half-sine) - supports transient overvoltage clamping |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by band; leads plated with RoHS-compliant annealed matte tin, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference terminal | Connected to lower-potential node (e.g., ground or return path) in shunt regulator configuration |
| Cathode | Reverse-biased reference terminal | Banded end; connected to regulated voltage node (e.g., feedback divider tap) - must be more positive than anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N53xxB series | Industry-standard footprint and electrical behavior enabling drop-in replacement across multiple vendors |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Robust handling during manual and automated assembly without special ESD controls |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU - tin-lead-free plating compatible with lead-free reflow |
| High surge current capability | 6.3 A peak (8.3 ms) - provides effective transient voltage suppression without external TVS devices |
Applications
| Switching Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or forward converter feedback paths using optocoupler-coupled TL431 alternatives. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 15 V threshold for error amplifier biasing and loop compensation. Use Value: Maintains ±5% regulation accuracy across –40°C to +85°C ambient, reducing need for trimming resistors in production calibration. | Use Scenario: Providing stable excitation voltage for bridge-based pressure or strain sensors in factory automation systems. IC Role / Device Role / Timing Role: Two-terminal reference source delivering low-drift 15 V to sensor Wheatstone bridges. Use Value: 0.25 V ΔVZ ensures <0.5% output voltage shift over 10–50% load current range, improving measurement linearity. |
| Overvoltage Clamp for 12 V Rails | Programmable Current Source Bias |
Use Scenario: Protecting microcontroller I/O pins and analog front-ends from accidental 12 V rail transients in automotive body control modules. IC Role / Device Role / Timing Role: Passive clamp limiting voltage to 15 V during surges exceeding system rating. Use Value: Withstands 6.3 A 8.3 ms surges without degradation, eliminating need for additional TVS diodes in cost-sensitive designs. | Use Scenario: Setting bias current for constant-current LED drivers or op-amp-based current sinks in lighting control circuits. IC Role / Device Role / Timing Role: Stable voltage reference defining emitter-base or sense-resistor voltage drop in transistor-based current mirrors. Use Value: Low 2.5 Ω ZZ minimizes current error due to load variation, achieving <1% current accuracy over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5352B (no TR8) | Same electrical specs; differs only in packaging - bulk vs. tape-and-reel (TR8 = EIA-296 compliant 8 mm tape) | Identical circuit function; TR8 enables automated pick-and-place assembly | Select 1N5352B/TR8 for SMT production; choose bulk 1N5352B for prototyping or hand-soldered repairs |
| MMBZ5245B (SOT-23) | Surface-mount package; same 15 V ±5%, but rated for only 0.35 W - not a power-equivalent replacement | Used in space-constrained low-power circuits; cannot replace 1N5352B/TR8 in 5 W applications | Choose MMBZ5245B only when board area is critical and power dissipation ≤350 mW; otherwise retain 1N5352B/TR8 for full 5 W capability |
Compared with 1N5352B/TR8, the bulk 1N5352B offers identical performance but lacks tape-and-reel packaging for automated assembly, while MMBZ5245B trades power handling for miniaturization - making 1N5352B/TR8 the sole option for through-hole 5 W 15 V regulation with industrial temperature range support.
Availability
1N5352B/TR8 is available at Aetrix Electronics and suitable for switching power supplies, industrial sensor interfaces, overvoltage protection circuits, and programmable current sources requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5352B/TR8 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 RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing wide temperature operation (–65°C to +150°C), high surge immunity, and JEDEC-standard compatibility.
FAQ
What is the Zener voltage tolerance of the 1N5352B/TR8?
The 1N5352B/TR8 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix in its part number. This means its actual regulation voltage falls within 14.25 V to 15.75 V at 75 mA test current and 25°C lead temperature. The tolerance is guaranteed across the full operating temperature range of –65°C to +150°C, and applies to all units in the production lot without binning.
Can the 1N5352B/TR8 be used without a heatsink?
The 1N5352B/TR8 can dissipate up to 5.0 W only when mounted with 3/8″ (10 mm) lead length from the body and lead temperature held below 25°C - typically requiring a PCB copper pour or external heatsink. At ambient temperature (TA = 25°C) on standard FR4 with 4 mm² copper pads, its derated power drops to 1.47 W. Therefore, sustained 5 W operation without heatsinking exceeds safe thermal limits and risks premature failure.
What does the "TR8" suffix mean in 1N5352B/TR8?
The "TR8" suffix in 1N5352B/TR8 indicates EIA-296 standard tape-and-reel packaging: 8 mm carrier tape, 1,500 units per reel. This format supports automated surface-mount assembly equipment. The underlying electrical and thermal specifications are identical to the bulk-packaged 1N5352B; only the packaging method differs. TR8 compliance ensures consistent feeding and placement reliability in high-volume manufacturing.
Is the 1N5352B/TR8 RoHS compliant?
Yes, the 1N5352B/TR8 is RoHS compliant, as confirmed by the "e3" designation in Microsemi's official documentation. Its leads feature RoHS-compliant annealed matte-tin plating, meeting EU Directive 2011/65/EU requirements. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and is qualified for lead-free reflow soldering up to 260°C for 10 seconds.
How does the voltage regulation (ΔVZ) specification impact circuit design with the 1N5352B/TR8?
The 1N5352B/TR8 specifies a maximum voltage regulation (ΔVZ) of 0.25 V - the difference between its Zener voltage measured at 10% and 50% of IZM (i.e., 7.5 mA and 37.5 mA). This tight ΔVZ ensures minimal output voltage shift across typical operating current ranges, allowing designers to achieve stable references without additional regulation stages. In feedback loops, it directly reduces output voltage error budget and improves overall power supply accuracy.
1N5352B/TR8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 10.8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- T-18
1N5352B/TR8 FAQ
1.How can I place an order for 1N5352B/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5352B/TR8 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 1N5352B/TR8 reliable?
The price and inventory of 1N5352B/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5352B/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5352B/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5352B/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5352B/TR8?
1N5352B/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5352B/TR8 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 1N5352B/TR8?
For technical support, including 1N5352B/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5352B/TR8 requirements.
6.How does Aetrix verify that 1N5352B/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5352B/TR8 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 1N5352B/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5352B/TR8?
All 1N5352B/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5352B/TR8, 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 1N5352B/TR8 part is unused and in its original packaging.
Return procedure for 1N5352B/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5352B/TR8 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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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
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SMAZ12-13-F
Diodes Incorporated
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