My Inquiry
My Account
Microchip Technology 1N5357BE3/TR12
- Part No.:
- 1N5357BE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5357BE3/TR12.pdf
- Description:
- DIODE ZENER 20V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,304
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5357BE3/TR12 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with nominal regulation voltage of 20 V, ±5% tolerance (B suffix), 3.0 Ω dynamic impedance at 65 mA test current, and maximum reverse leakage of 0.5 μA at 15.2 V. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5357BE3/TR12 datasheet, 1N5357BE3/TR12 pinout, 1N5357BE3/TR12 application, or 1N5357BE3/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (75 A), voltage regulation (ΔVZ = 0.40 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown mode, with Zener voltage specified at 20 V ±5% under 65 mA DC test current (IZT) at 25 °C lead temperature. Its low dynamic impedance (3.0 Ω) ensures stable regulation across load variations.
The 1N5357BE3/TR12 features a T-18 axial package with cathode band marking, moisture sensitivity level 1 (no dry pack required), and UL94V-0 void-free epoxy encapsulation. Thermal resistance is 25 °C/W junction-to-lead at 10 mm lead length, enabling 5.0 W dissipation at TL < 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±5% - precise regulation point for 20 V reference circuits |
| Test Current (IZT) | 65 mA - defines nominal operating point for VZ measurement |
| Dynamic Impedance (ZZ) | 3.0 Ω - low AC impedance ensures minimal voltage shift under varying load current |
| Max Reverse Leakage (IR) | 0.5 μA @ 15.2 V - ultra-low leakage preserves regulation accuracy at near-Zener threshold |
| Max Regulator Current (IZM) | 75 mA - maximum continuous DC current before thermal derating begins |
| Surge Current (IZSM) | 75 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
| Voltage Regulation (ΔVZ) | 0.40 V - difference between VZ measured at 10% and 50% of IZM, indicating tight regulation linearity |
Pinout & Package
Package: T-18 axial-leaded plastic case (JEDEC TO-204-AD), cathode indicated by color band; leads are annealed matte-tin plated per MIL-STD-750, solderable at 260 °C for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased input terminal | Connected to lower-potential node; carries full Zener current during regulation |
| Cathode | Regulated output terminal | Banded end; maintains stable 20 V relative to anode when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant construction | e3 suffix confirms lead-free matte-tin plating and halogen-free epoxy per JEDEC J-STD-609 |
| Moisture sensitivity level 1 | No dry pack or baking required prior to assembly - reduces manufacturing overhead |
| Low thermal resistance | 25 °C/W junction-to-lead enables full 5.0 W dissipation with minimal heatsinking |
| High surge withstand | 75 A non-repetitive surge rating supports robust protection in unregulated input stages |
| Stable voltage regulation | ΔVZ = 0.40 V ensures predictable performance across 7.5–37.5 mA operating range |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp for 24 V Systems |
|---|---|
Use Scenario: Providing stable 20 V reference for feedback loop of isolated DC-DC converter in factory automation PLC power module. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference establishing precise error amplifier setpoint. Use Value: ±5% VZ tolerance and 3.0 Ω ZZ minimize output voltage drift across line/load/temperature variations. |
Use Scenario: Clamping transient spikes on 24 V CAN bus power rail during load dump events in heavy machinery control units. IC Role / Device Role / Timing Role: Passive overvoltage protector diverting surge energy to ground when rail exceeds 20 V. Use Value: 75 A surge rating and 0.40 V ΔVZ ensure reliable clamping without thermal runaway or parameter shift. |
| Programmable Logic Controller I/O Protection | Test Equipment Voltage Calibration Standard |
Use Scenario: Protecting analog input channel of modular I/O card against ESD and field-wiring faults in oil & gas monitoring systems. IC Role / Device Role / Timing Role: Bidirectional transient suppressor (with series resistor) limiting fault voltage to safe 20 V level. Use Value: 0.5 μA leakage at 15.2 V prevents signal loading; UL94V-0 package meets hazardous-area flammability requirements. |
Use Scenario: Serving as traceable 20 V calibration reference in portable multimeter self-test circuitry. IC Role / Device Role / Timing Role: Primary voltage standard referenced against NIST-traceable sources during factory calibration. Use Value: Tight 3.0 Ω ZZ and 0.40 V ΔVZ enable repeatable 20 V output across multiple measurement cycles and ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5357B (non-e3) | Same electrical specs but SnPb lead finish; not RoHS compliant | Permitted only in legacy military/aerospace designs exempt from RoHS | Select 1N5357BE3/TR12 for new commercial/industrial designs requiring lead-free compliance |
| MMSZ5248ET1G | Surface-mount SOD-123 package; 20 V ±5%, 500 mW rating, 22 Ω ZZ | Limited to low-power signal-level regulation; cannot replace 5 W dissipation requirement | Use MMSZ5248ET1G only in space-constrained PCBs where power < 0.5 W suffices |
Compared with 1N5357B and MMSZ5248ET1G, the 1N5357BE3/TR12 uniquely delivers 5.0 W power handling, 3.0 Ω dynamic impedance, and RoHS-compliant T-18 packaging - making it the sole option for high-reliability, high-power 20 V shunt regulation where thermal margin and regulatory compliance are mandatory.
Availability
1N5357BE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, programmable logic controller I/O protection, and test equipment voltage calibration requiring stable component supply and long-term lifecycle support.
Supply support for 1N5357BE3/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 Zener regulation in harsh-environment power systems, emphasizing thermal robustness, surge immunity, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of the 1N5357BE3/TR12?
The 1N5357BE3/TR12 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its part number. This means its nominal 20 V regulation point falls within 19.0 V to 21.0 V at 65 mA test current and 25 °C lead temperature. The e3 suffix confirms RoHS compliance but does not affect voltage tolerance.
Can the 1N5357BE3/TR12 be used in surface-mount designs?
No - the 1N5357BE3/TR12 uses a T-18 axial-leaded package and requires through-hole mounting. For surface-mount equivalents, Microsemi offers the SMBJ5357B series in DO-214AA (SMB) package, which shares identical electrical specs but differs in thermal profile and board assembly process.
What is the maximum continuous power dissipation for the 1N5357BE3/TR12?
The 1N5357BE3/TR12 is rated for 5.0 W steady-state power dissipation at lead temperature (TL) below 25 °C with 10 mm lead length from body. Derating begins linearly above 25 °C at 20 mW/°C, reaching zero dissipation at 150 °C per Figure 1 in the datasheet.
How is polarity marked on the 1N5357BE3/TR12?
The 1N5357BE3/TR12 uses a cathode band - a single colored stripe near one end of the cylindrical body - to identify the cathode terminal. During operation, the banded end must be held at higher potential than the anode to achieve Zener breakdown and regulation.
Does the 1N5357BE3/TR12 require moisture preconditioning before reflow?
No - the 1N5357BE3/TR12 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it may be stored indefinitely at ≤30 °C/60% RH without dry packing or baking. This eliminates pre-reflow bake steps and simplifies manufacturing flow.
1N5357BE3/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):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 14.4 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
1N5357BE3/TR12 FAQ
1.How can I place an order for 1N5357BE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5357BE3/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 1N5357BE3/TR12 reliable?
The price and inventory of 1N5357BE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5357BE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5357BE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5357BE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5357BE3/TR12?
1N5357BE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5357BE3/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 1N5357BE3/TR12?
For technical support, including 1N5357BE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5357BE3/TR12 requirements.
6.How does Aetrix verify that 1N5357BE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5357BE3/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 1N5357BE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5357BE3/TR12?
All 1N5357BE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5357BE3/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 1N5357BE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5357BE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5357BE3/TR12 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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
