My Inquiry
My Account
Microchip Technology 1N5346AE3/TR8
- Part No.:
- 1N5346AE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5346AE3/TR8.pdf
- Description:
- DIODE ZENER 9.1V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,066
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5346AE3/TR8 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with nominal regulation voltage of 9.1 V, ±10% tolerance (A suffix), 150 mA maximum Zener current (IZM), and 2.0 Ω maximum dynamic impedance (ZZ) at 150 mA test current. It operates from –65°C to +150°C and is used for precision voltage reference and overvoltage protection in DC power supplies.
For engineers reviewing the 1N5346AE3/TR8 datasheet, 1N5346AE3/TR8 pinout, 1N5346AE3/TR8 application, or 1N5346AE3/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (520 A), voltage regulation (ΔVZ = 0.22 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-biased breakdown mode. Its 9.1 V nominal Zener voltage is specified at 150 mA test current (IZT), with dynamic impedance measured at 1 kHz AC superimposed on DC bias.
Thermal performance is defined by junction-to-lead resistance of 25 °C/W at 3/8" lead length, enabling stable regulation under sustained 5.0 W dissipation when adequately heat-sunk. Reverse leakage remains ≤7.5 μA at 6.6 V (VR), confirming tight low-current stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±10% - defines regulated output voltage under 150 mA DC bias; tolerance impacts reference accuracy in feedback loops. |
| Power Dissipation | 5.0 W at TL = 25°C - maximum continuous power handling with proper lead-length heat sinking. |
| Dynamic Impedance (ZZ) | 2.0 Ω max at IZT = 150 mA - low impedance ensures minimal output voltage shift across load current changes. |
| Surge Current (IZSM) | 520 A peak (8.3 ms half-sine) - supports transient overvoltage clamping without failure. |
| Voltage Regulation (ΔVZ) | 0.22 V - difference between VZ at 10% and 50% of IZM; quantifies regulation linearity over operating range. |
| Reverse Leakage (IR) | 7.5 μA max at VR = 6.6 V - confirms low off-state conduction critical for standby power integrity. |
| Thermal Resistance | 25 °C/W junction-to-lead - enables thermal design using lead length as heatsink; 85 °C/W junction-to-ambient on FR4. |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to circuit ground or lower-potential rail during Zener operation; carries full reverse current when regulating. |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to voltage source input; maintains stable 9.1 V relative to anode under reverse bias. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB series mechanical and electrical definitions for interchangeability. |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies SMT reflow prep and eliminates baking steps before assembly. |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - withstands handling without special ESD controls. |
| High Surge Withstand | 520 A peak surge rating - protects downstream circuitry against lightning-induced or inductive-switching transients. |
| RoHS Compliant (e3) | Lead-free matte-tin plating - meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 1 marking. |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing unregulated 12 V DC rail in industrial control modules where ±5% output variation is unacceptable. IC Role / Device Role / Timing Role: Two-terminal shunt regulator maintaining fixed 9.1 V reference for op-amp comparators and LDO feedback networks. Use Value: Delivers 5.0 W continuous dissipation capability and 0.22 V voltage regulation (ΔVZ) to hold output within ±0.5% across 50–150 mA load range. | Use Scenario: Clamping induced surges on 10 V sensor interface lines exposed to 24 V field wiring in factory automation systems. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 520 A surge energy (8.3 ms half-sine) without degradation. Use Value: Prevents damage to downstream ADC inputs by limiting excursion to ≤9.1 V + 0.22 V while sustaining 7.5 μA leakage at 6.6 V. |
| Programmable Reference Source | Temperature-Stable Bias Generator |
Use Scenario: Providing adjustable reference voltage in analog front-end circuits where 9.1 V sets gain scaling for current-sense amplifiers. IC Role / Device Role / Timing Role: Precision voltage node referenced to ground via anode; cathode tied to feedback divider network. Use Value: ±10% tolerance allows calibration trimming; 2.0 Ω dynamic impedance minimizes error contribution from divider current variations. | Use Scenario: Generating stable bias current for RF amplifier stages operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Temperature-compensated current source using constant-voltage drop across series resistor. Use Value: Maintains regulation over –65°C to +150°C with 25 °C/W thermal resistance, enabling predictable bias current drift <±0.05%/°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5346B | Same 9.1 V nominal voltage but ±5% tolerance (B suffix) vs. ±10% (A suffix); identical package, thermal, and surge specs. | Higher voltage accuracy required in closed-loop feedback paths where tighter regulation reduces system error budget. | Select 1N5346B when reference stability dominates cost sensitivity; 1N5346AE3/TR8 preferred for cost-sensitive surge-clamp roles. |
| MMBZ5240BLT1G | Surface-mount SOT-23 package; 9.1 V ±5%, 225 mW power rating - not a direct replacement due to 22× lower power capacity. | Used only in low-power portable electronics where board space constraints prohibit axial-leaded devices. | Choose MMBZ5240BLT1G only for space-constrained PCBs with <200 mW dissipation needs; 1N5346AE3/TR8 remains mandatory for 5 W applications. |
Compared with 1N5346B and MMBZ5240BLT1G, the 1N5346AE3/TR8 uniquely balances high-power dissipation (5 W), axial-leaded mechanical robustness, and RoHS compliance - making it irreplaceable in industrial power supply and surge protection designs requiring >1 W continuous regulation.
Availability
1N5346AE3/TR8 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and programmable reference sources requiring stable component supply across automotive, industrial control, and telecom infrastructure programs.
Supply support for 1N5346AE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized voltage regulation in harsh-environment power systems, emphasizing surge resilience, wide temperature operation, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5346AE3/TR8?
The 1N5346AE3/TR8 has a Zener voltage tolerance of ±10%, indicated by the "A" suffix in its part number. This means its actual regulation voltage falls between 8.19 V and 10.01 V at 150 mA test current and 25°C lead temperature. The tolerance directly affects accuracy in reference and feedback applications, and users must account for this range during circuit tolerance analysis. The 1N5346AE3/TR8 is not rated for tighter tolerances unless calibrated externally.
Can the 1N5346AE3/TR8 be used in surface-mount designs?
No, the 1N5346AE3/TR8 is an axial-leaded T-18 package device and is not compatible with surface-mount assembly processes. It requires through-hole mounting with 3/8" (10 mm) lead length for thermal derating compliance. For SMT equivalents, Microsemi offers the SMBJ5346B or SMBG5346B series - but these differ in package, thermal performance, and surge rating. The 1N5346AE3/TR8 itself must be mounted mechanically with axial leads soldered into plated-through holes.
What is the maximum surge current rating for the 1N5346AE3/TR8?
The 1N5346AE3/TR8 has a maximum non-recurrent surge current (IZSM) rating of 520 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating is validated per JEDEC standards and reflects the device's ability to absorb transient energy without parametric shift or catastrophic failure. Engineers must ensure external series impedance limits peak current to ≤520 A during surge events; exceeding this value risks permanent degradation of the 1N5346AE3/TR8.
How does the thermal resistance of the 1N5346AE3/TR8 affect PCB layout?
With a junction-to-lead thermal resistance of 25 °C/W, the 1N5346AE3/TR8 relies on lead length (3/8" from body) as its primary heat path. PCB layout must maintain ≥10 mm straight lead length outside the epoxy body and avoid excessive copper pour near the leads that could trap heat. On FR4 boards, junction-to-ambient resistance rises to 85 °C/W - so forced-air cooling or thermal vias are recommended above 1.5 W dissipation. Layout decisions directly impact long-term reliability of the 1N5346AE3/TR8.
Is the 1N5346AE3/TR8 compliant with RoHS and REACH regulations?
Yes, the 1N5346AE3/TR8 is RoHS compliant, confirmed by the "e3" suffix denoting matte-tin plating per JEDEC J-STD-609A Class 1. It contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits. REACH SVHC screening is also satisfied per Microsemi's declaration. The 1N5346AE3/TR8 is suitable for export to EU, China, and Korea markets requiring full environmental compliance documentation.
1N5346AE3/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):
- 9.1 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 6.6 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
1N5346AE3/TR8 FAQ
1.How can I place an order for 1N5346AE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5346AE3/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 1N5346AE3/TR8 reliable?
The price and inventory of 1N5346AE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5346AE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5346AE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5346AE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5346AE3/TR8?
1N5346AE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5346AE3/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 1N5346AE3/TR8?
For technical support, including 1N5346AE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5346AE3/TR8 requirements.
6.How does Aetrix verify that 1N5346AE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5346AE3/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 1N5346AE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5346AE3/TR8?
All 1N5346AE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5346AE3/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 1N5346AE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5346AE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5346AE3/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…
