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Microchip Technology 1N5369/TR12
- Part No.:
- 1N5369/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5369/TR12.pdf
- Description:
- DIODE ZENER 51V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,958
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Product details
Overview
1N5369/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 51 V, ±5% tolerance (B suffix), 25 Ω dynamic impedance at 25 mA test current, and maximum reverse leakage of 0.5 µA at 40.8 V. It operates from –65°C to +150°C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5369/TR12 datasheet, 1N5369/TR12 pinout, 1N5369/TR12 application, or 1N5369/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (230 A), voltage regulation (ΔVZ = 0.9 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal shunt voltage regulator, maintaining stable output voltage across wide operating current (25 mA IZT to 98 mA IZM) and temperature ranges. Its low dynamic impedance (25 Ω) ensures minimal voltage deviation under load transients, while its 25 °C/W junction-to-lead thermal resistance enables reliable 5 W dissipation with standard 3/8″ lead length heat sinking.
The 1N5369/TR12 exhibits tight voltage regulation (ΔVZ = 0.9 V between 10% and 50% of IZM), low knee impedance (27 Ω at 1 mA), and high surge capability (230 A, 8.3 ms half-sine). Polarity is marked by cathode band; operation requires cathode positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51 V ±5% - precise regulation point for feedback networks requiring stable mid-range voltage reference |
| Test Current (IZT) | 25 mA - standardized bias point for VZ measurement; design must ensure ≥25 mA for spec-compliant regulation |
| Dynamic Impedance (ZZ) | 25 Ω at 25 mA - low AC impedance minimizes output voltage ripple under varying load currents |
| Max Reverse Leakage (IR) | 0.5 µA at 40.8 V - ensures negligible standby current in high-impedance sensing or bias circuits |
| Max Regulator Current (IZM) | 98 mA - maximum continuous DC current before exceeding 5 W power limit at 25°C lead temperature |
| Voltage Regulation (ΔVZ) | 0.9 V - difference between VZ measured at 10% and 50% of IZM; defines regulation linearity over operating range |
| Surge Current (IZSM) | 230 A (8.3 ms half-sine) - withstands transient overvoltage events without degradation |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables full 5 W dissipation with simple 3/8″ lead heatsinking; no PCB copper area required |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL; void-free UL94V-0 epoxy body; cathode indicated by colored band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink terminal during Zener conduction | Connected to lower-potential node (e.g., ground or feedback divider low-side); must handle full IZ current |
| Cathode | Current source terminal during Zener conduction | Banded end; connected to regulated voltage node; polarity reversal causes forward conduction at ~1.2 V |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Industry-standard footprint and reliability; compatible with legacy axial-lead assembly processes |
| ±5% voltage tolerance (B suffix) | Reduces calibration overhead in fixed-output supplies versus ±10% or ±20% variants |
| Moisture sensitivity Level 1 | No dry pack or baking required prior to soldering-reduces manufacturing handling cost |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during board assembly or repair |
| RoHS-compliant (e3 suffix) | Meets global environmental compliance requirements without performance trade-off |
| High surge current rating | 230 A capability protects downstream circuitry against line transients without external TVS |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Excitation Reference |
|---|---|
Use Scenario: Provides stable 51 V reference for optocoupler-based feedback in isolated 48 V output SMPS. IC Role / Device Role / Timing Role: Shunt voltage reference regulating error amplifier input; sets output voltage via resistor divider ratio. Use Value: 0.9 V ΔVZ ensures <±1% output voltage drift across load steps; 25 Ω ZZ suppresses switching noise coupling into feedback path. | Use Scenario: Supplies excitation voltage to 4–20 mA loop-powered pressure sensors requiring stable mid-range bias. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed 51 V rail independent of loop current variation. Use Value: 0.5 µA leakage at 40.8 V prevents loading of high-impedance sensor bridges; ±5% tolerance eliminates field calibration. |
| Overvoltage Clamp for 48 V Telecom Systems | Programmable Threshold Detector in PLC Input Modules |
Use Scenario: Clamps transient surges on -48 V DC distribution bus to protect line cards during lightning-induced spikes. IC Role / Device Role / Timing Role: Passive crowbar element conducting only above 51 V; absorbs energy via 230 A surge rating. Use Value: 230 A 8.3 ms surge rating handles telecom GR-1089 Class B transients without failure; 25 °C/W RθJL allows direct chassis mounting. | Use Scenario: Sets trip threshold for digital input monitoring of 24–60 V industrial control signals in programmable logic controllers. IC Role / Device Role / Timing Role: Voltage reference feeding comparator input; triggers state change when input exceeds 51 V ±5%. Use Value: Tight 5% tolerance ensures repeatable detection across temperature; low 25 Ω ZZ maintains threshold stability during fast-rising transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5369B | Same electrical specs but in bulk packaging (no TR12 tape-and-reel); identical T-18 package and marking | Preferred for manual prototyping or low-volume hand-soldered assemblies where reel feed is unnecessary | Select 1N5369B for bench evaluation or small-batch builds; 1N5369/TR12 for automated SMT placement with 12 mm tape pitch |
| MMBZ5255B (SOT-23) | Surface-mount 0.5 W Zener; 51 V ±5%; 100 Ω ZZ; 10 µA IR at 41 V - lower power, higher impedance, smaller footprint | Suitable only for low-current biasing or signal-level clamping; cannot replace 1N5369/TR12 in 5 W power regulation roles | Choose MMBZ5255B only for space-constrained, low-power designs where thermal mass and surge immunity are secondary |
Compared with 1N5369B and MMBZ5255B, the 1N5369/TR12 uniquely delivers 5 W power handling, 25 Ω dynamic impedance, and 230 A surge capability in an industry-standard axial package-making it irreplaceable for robust, high-energy voltage regulation where thermal and transient resilience are critical.
Availability
1N5369/TR12 is available at Aetrix Electronics and suitable for switch-mode power supply feedback, industrial sensor excitation reference, and overvoltage clamp applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5369/TR12 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 1N53xxB series was designed specifically for ruggedized 5 W voltage regulation in harsh-environment power systems-emphasizing surge survivability, wide temperature operation, and JEDEC-standard mechanical compatibility.
FAQ
What is the Zener voltage tolerance for 1N5369/TR12?
The 1N5369/TR12 has a ±5% Zener voltage tolerance, indicated by the "B" suffix in its full designation. This means its nominal 51 V regulation voltage falls within 48.45 V to 53.55 V at 25°C lead temperature and 25 mA test current, as specified in Microsemi's official 1N5333B–1N5388B datasheet Rev D.
Does 1N5369/TR12 require dry packing before reflow soldering?
No, the 1N5369/TR12 has IPC/JEDEC J-STD-020B moisture sensitivity Level 1, meaning it is not hygroscopic and does not require dry packing or baking prior to soldering. Its void-free thermosetting epoxy body meets UL94V-0 and is rated for 260°C for 10 seconds per MIL-STD-750.
What is the maximum continuous current for 1N5369/TR12 at 25°C?
The maximum continuous Zener current (IZM) for 1N5369/TR12 is 98 mA at 25°C lead temperature (TL), corresponding to its 5.0 W power rating. This value assumes 3/8″ (10 mm) lead length from the body for heat sinking; derating applies above 25°C TL per Figure 1 in the datasheet.
Can 1N5369/TR12 be used as a replacement for 1N5369B?
Yes, the 1N5369/TR12 is functionally and electrically identical to 1N5369B, differing only in packaging: TR12 denotes EIA-296-compliant tape-and-reel (12 mm carrier tape), while 1N5369B is supplied in bulk. Both share identical T-18 package dimensions, electrical specs, and RoHS (e3) compliance.
What is the cathode marking convention for 1N5369/TR12?
The cathode of the 1N5369/TR12 is identified by a single color band on the body. During normal Zener operation, the banded (cathode) end must be held at a more positive potential than the unbanded (anode) end. Forward voltage is ≤1.2 V at 1.0 A, per the datasheet's maximum ratings table.
1N5369/TR12 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):
- 51 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 27 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 36.7 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
1N5369/TR12 FAQ
1.How can I place an order for 1N5369/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5369/TR12 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 1N5369/TR12 reliable?
The price and inventory of 1N5369/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5369/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5369/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5369/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5369/TR12?
1N5369/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5369/TR12 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 1N5369/TR12?
For technical support, including 1N5369/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5369/TR12 requirements.
6.How does Aetrix verify that 1N5369/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5369/TR12 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 1N5369/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5369/TR12?
All 1N5369/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5369/TR12, 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 1N5369/TR12 part is unused and in its original packaging.
Return procedure for 1N5369/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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