My Inquiry
My Account
Microchip Technology 1N5357C/TR8
- Part No.:
- 1N5357C/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5357C/TR8.pdf
- Description:
- DIODE ZENER 20V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,560
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5357C/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 20 V, ±2% tolerance (C suffix), 3.0 Ω maximum dynamic impedance at 65 mA test current, and 75 mA maximum Zener current when adequately heat-sunk. 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 1N5357C/TR8 datasheet, 1N5357C/TR8 pinout, 1N5357C/TR8 application, or 1N5357C/TR8 equivalent, key selection criteria include its tight ±2% VZ tolerance, low 3.0 Ω ZZ, 237 Ω maximum knee impedance at 1 mA, and compatibility with standard T-18 axial package mounting on FR4 PCBs with 1 oz copper.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, where the cathode band must be held positive relative to the anode. Its regulation performance is specified at 25°C lead temperature (TL), with thermal resistance of 25°C/W junction-to-lead at 10 mm lead length.
It delivers stable 20 V reference under dc currents from 10% to 50% of IZM (75 mA), exhibiting ≤0.40 V voltage regulation (ΔVZ) across that range and sustaining up to 75 A surge current (8.3 ms half-sine) without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±2% - precise reference for feedback networks requiring tighter than ±5% stability |
| Test Current (IZT) | 65 mA - operating point at which VZ and ZZ are guaranteed |
| Dynamic Impedance (ZZ) | 3.0 Ω max - low AC impedance ensures minimal output voltage variation under load transients |
| Max Regulator Current (IZM) | 75 mA - maximum continuous DC current at TL = 25°C with adequate heat sinking |
| Voltage Regulation (ΔVZ) | 0.40 V max - difference between VZ measured at 7.5 mA and 37.5 mA, indicating regulation linearity |
| Surge Current (IZSM) | 75 A - peak non-repetitive surge handling capability for transient suppression |
| Thermal Resistance (RθJL) | 25 °C/W - junction-to-lead value enables thermal design with 10 mm lead length from body |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-41 outline; void-free UL94V-0 epoxy body; cathode indicated by color band; leads plated with annealed matte tin (RoHS compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference terminal | Connected to circuit ground or lower potential node in shunt regulation configuration |
| Cathode | Regulated output terminal | Banded end; connected to unregulated input rail; supplies stable 20 V to feedback divider or clamp load |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables high-accuracy voltage references without external trimming in power supply feedback paths |
| 25 °C/W junction-to-lead thermal resistance | Supports 5 W dissipation with simple lead-length-based heatsinking-no PCB copper pour required |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for SMT-compatible tape-and-reel (TR8) delivery |
| 1.2 V forward voltage @ 1.0 A | Allows safe use as polarity-protection diode in series with regulated output during fault conditions |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-safe workstations in assembly |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Provides stable 20 V reference in optocoupler-based feedback loop of isolated 48 V DC-DC converter. IC Role / Device Role / Timing Role: Shunt voltage reference regulating error amplifier input voltage. Use Value: ±2% VZ tolerance ensures output voltage accuracy within ±1.5% across line/load/temperature without calibration. | Use Scenario: Supplies excitation voltage to bridge-type pressure sensor in factory automation PLC module. IC Role / Device Role / Timing Role: Precision analog reference source for ratiometric measurement. Use Value: Low 3.0 Ω ZZ minimizes reference drift under varying sensor bias current, improving measurement repeatability. |
| Overvoltage Clamp Protection | Programmable Threshold Detector |
Use Scenario: Clamps 24 V rail to 20 V during load dump events in automotive body control module. IC Role / Device Role / Timing Role: Transient voltage suppressor in parallel with protected IC inputs. Use Value: 75 A surge rating handles ISO 7637-2 Pulse 5a without failure; 0.40 V ΔVZ ensures predictable clamping window. | Use Scenario: Sets trip threshold for comparator monitoring battery pack voltage in medical portable device. IC Role / Device Role / Timing Role: Stable reference input to LM393 comparator's inverting input. Use Value: Tight ±2% tolerance allows accurate 20.0 V ±0.4 V detection without trimming resistors or digital calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5357B/TR8 | ±5% VZ tolerance, same 20 V nominal, identical package and IZM | Acceptable where system-level calibration compensates for wider voltage spread | Select for cost-sensitive designs where ±5% regulation meets functional safety margin |
| MMBZ5242B (SOT-23) | Surface-mount, 0.5 W rating, ±5% VZ, 20 V nominal, 30 Ω ZZ | Limited to low-power signal-level referencing; not suitable for 5 W dissipation | Choose only for space-constrained PCBs where power dissipation < 150 mW and board area is critical |
Compared with 1N5357B/TR8, the 1N5357C/TR8 provides tighter regulation for higher-accuracy feedback, while MMBZ5242B offers footprint reduction at the expense of power handling and precision-neither is pin-compatible due to axial vs. SMT packaging.
Availability
1N5357C/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, sensor reference circuits, overvoltage protection systems, and programmable threshold detectors requiring stable component supply and long-term obsolescence management.
Supply support for 1N5357C/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/C series was designed as a JEDEC-registered family of 5 W axial Zeners for robust, high-stability voltage regulation in harsh-environment power systems where thermal resilience and long-term parametric consistency are critical.
FAQ
What is the Zener voltage tolerance of the 1N5357C/TR8?
The 1N5357C/TR8 has a Zener voltage tolerance of ±2%, as indicated by the "C" suffix per Microsemi documentation. This means its measured VZ at 65 mA and 25°C lead temperature falls within 19.6 V to 20.4 V. This tighter tolerance supports precision regulation tasks where ±5% devices like the 1N5357B/TR8 would introduce excessive error in feedback or reference paths.
Can the 1N5357C/TR8 be used in surface-mount designs?
No-the 1N5357C/TR8 uses a T-18 axial-leaded package and is not a surface-mount device. While Microsemi offers surface-mount equivalents such as SMBJ5357B, the 1N5357C/TR8 requires through-hole mounting with 10 mm lead length for thermal derating compliance. Attempting SMT reflow will damage the device due to its axial construction and plating specification.
What is the maximum continuous power dissipation for the 1N5357C/TR8?
The 1N5357C/TR8 is rated for 5.0 W steady-state power dissipation at 25°C lead temperature (TL) with 3/8 inch (10 mm) lead length from the body. When mounted on FR4 with 1 oz copper, its derated power drops to 1.47 W at 25°C ambient (TA). The 25°C/W junction-to-lead thermal resistance confirms this rating assumes proper lead heatsinking-not PCB copper area alone.
How does the 1N5357C/TR8 behave under surge conditions?
The 1N5357C/TR8 is rated for a maximum non-repetitive surge current (IZSM) of 75 A for an 8.3 ms half-sine waveform, per Microsemi's test method. This capability enables reliable overvoltage clamping in automotive load-dump or industrial switching transient scenarios. Its 20 V regulation remains stable post-surge if energy stays within single-pulse limits and junction temperature does not exceed 150°C.
Is the 1N5357C/TR8 RoHS compliant?
Yes-the "e3" designation in Microsemi's official documentation confirms RoHS compliance for the 1N5357C/TR8. Its leads feature annealed matte-tin plating per MIL-STD-750 Method 2026, and the void-free epoxy body meets UL94V-0 flammability requirements. The TR8 tape-and-reel packaging format also conforms to EIA-296 standards for automated assembly.
1N5357C/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):
- 20 V
- Tolerance:
- ±2%
- 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
1N5357C/TR8 FAQ
1.How can I place an order for 1N5357C/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5357C/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 1N5357C/TR8 reliable?
The price and inventory of 1N5357C/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5357C/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5357C/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5357C/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5357C/TR8?
1N5357C/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5357C/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 1N5357C/TR8?
For technical support, including 1N5357C/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5357C/TR8 requirements.
6.How does Aetrix verify that 1N5357C/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5357C/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 1N5357C/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5357C/TR8?
All 1N5357C/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5357C/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 1N5357C/TR8 part is unused and in its original packaging.
Return procedure for 1N5357C/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5357C/TR8 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…
