My Inquiry
My Account
onsemi 1N5351BG
- Part No.:
- 1N5351BG
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5351BG.pdf
- Description:
- DIODE ZENER 14V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,989
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5351BG from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 14.0 V, ±5% tolerance, maximum zener impedance of 100 Ω at 2.5 mA test current, and surge rating of 75 A at 8.3 ms. It operates across −65 °C to +200 °C and is used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N5351BG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal behavior, polarity marking, Pb-free package compliance, and real-world design context for stable DC voltage reference implementation.
Technical Context
The 1N5351BG employs a silicon-oxide passivated junction for improved stability and low leakage. Its zener voltage is specified at IZT = 2.5 mA with guaranteed regulation across 13.3 V (min) to 14.7 V (max), and it maintains tight impedance control (ZZT ≤ 100 Ω) under that condition.
Thermal performance is defined by junction-to-lead resistance (θJL = 25 °C/W) and derating above 25 °C (40 mW/°C). The device supports surge currents up to 75 A for non-repetitive 8.3 ms pulses and exhibits a temperature coefficient of approximately +10.6 mV/°C near its nominal voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.0 V nominal, 13.3–14.7 V range at IZT = 2.5 mA - defines stable regulation point for feedback networks |
| Power Dissipation (PD) | 5 W at TL = 25 °C - sets maximum continuous DC power handling before thermal derating |
| Zener Impedance (ZZT) | ≤100 Ω at IZT = 2.5 mA - ensures minimal voltage deviation under load transients |
| Surge Current (IR) | 75 A peak at 8.3 ms - enables robust transient overvoltage clamping without failure |
| Leakage Current (IR) | ≤0.25 mA at VR = 10.6 V - guarantees low standby power loss in high-impedance bias networks |
| Operating Temperature | −65 °C to +200 °C - supports industrial, automotive under-hood, and aerospace environments |
| ESD Rating | Class 3 (>16 kV HBM) - provides built-in ESD resilience during board handling and assembly |
Pinout & Package
Package: Axial-lead, transfer-molded plastic (Case 017AA), Pb-free, cathode indicated by band. Dimensions: body length 8.38–8.89 mm, diameter 3.30–3.68 mm, lead length ≥25.4 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated circuit; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; supplies stable 14.0 V reference when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Silicon-oxide passivated junction | Enables tighter parameter distribution and long-term stability vs. metallized junctions |
| ±5% zener voltage tolerance | Reduces need for post-production trimming in cost-sensitive voltage reference designs |
| 180 W surge capability (8.3 ms) | Clamps fast transients without degradation-critical for input-stage protection |
| Pb-free (G suffix) construction | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 3 moisture sensitivity |
| Void-free thermosetting plastic case | Prevents moisture ingress and delamination during reflow or humid environment operation |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Provides precise 14.0 V reference to TL431 or similar shunt regulator IC. Use Value: Maintains ±1% output accuracy over line/load/temperature with <100 Ω dynamic impedance. | Use Scenario: Protects downstream 12 V logic rails from 24 V bus transients in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Acts as passive crowbar element clamping voltage spikes above 14.7 V. Use Value: Absorbs 75 A surges at 8.3 ms without parametric shift or catastrophic failure. |
| Programmable Voltage Reference | DC-DC Converter Trim Network |
Use Scenario: Sets adjustable output of LM317-based lab bench supply with fine resolution. IC Role / Device Role / Timing Role: Serves as stable, low-drift reference in resistor-divider network. Use Value: Delivers <0.25 mA leakage at 10.6 V, minimizing divider error and improving setpoint accuracy. | Use Scenario: Trims output of fixed 12 V DC-DC module to 13.8 V for telecom battery charging interface. IC Role / Device Role / Timing Role: Injects controlled current into feedback node to offset reference voltage. Use Value: Enables ±0.1 V trim resolution using standard 1% resistors due to tight 14.0 V nominal tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5351B | Same electrical specs but SnPb lead finish; not RoHS-compliant | Restricted to legacy non-RoHS production; incompatible with Pb-free soldering processes | Select only if exempt from RoHS or using SnPb assembly |
| MMSZ5241B | Surface-mount SOD-123 package; 14 V nominal, 500 mW rating; higher ZZT (20 Ω @ 20 mA) | Lower power, smaller footprint; unsuitable for >500 mW continuous dissipation | Choose for space-constrained PCBs where 5 W dissipation is unnecessary |
Compared with 1N5351B, the 1N5351BG offers identical regulation performance with Pb-free compliance; versus MMSZ5241B, it delivers 10× higher power handling and lower impedance at rated current but requires axial through-hole mounting.
Availability
1N5351BG is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and telecom infrastructure equipment requiring stable component supply and long-lifecycle support.
Supply support for 1N5351BG 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
onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The 1N53 Series is part of onsemi's discrete Zener portfolio designed specifically for high-reliability voltage regulation and transient suppression in harsh-environment power systems.
FAQ
What is the exact zener voltage tolerance and test condition for 1N5351BG?
The 1N5351BG has a ±5% zener voltage tolerance, verified at IZT = 2.5 mA with 40 ±10 ms current application per onsemi datasheet Rev. 19. Its specified range is 13.3 V (min) to 14.7 V (max), with 14.0 V as the nominal value. This tolerance applies strictly under DC test conditions at TA = 25 °C and lead length ≤3/8 inch.
Does 1N5351BG support high-temperature operation beyond 150 °C?
Yes, the 1N5351BG is rated for operating temperatures from −65 °C to +200 °C. Its maximum DC operating temperature is 150 °C, but it can withstand pulsed conditions up to 200 °C with low duty cycle or non-repetitive stress, as confirmed in Note 1 of the onsemi datasheet.
How does the thermal derating of 1N5351BG work above 25 °C?
The 1N5351BG derates linearly at 40 mW/°C above 25 °C ambient (TL). At 75 °C lead temperature, its usable power drops to 3 W (5 W − 40 mW/°C × 50 °C). Derating is based on junction-to-lead thermal resistance (θJL = 25 °C/W) and assumes 3/8-inch lead length to heatsink per datasheet Figure 1.
Is the cathode polarity clearly marked on 1N5351BG?
Yes, the cathode of the 1N5351BG is unambiguously indicated by a single color band on the plastic body, consistent with JEDEC axial-diode marking standards. This band must be oriented toward the higher-potential node in reverse-bias regulation applications to ensure proper zener breakdown operation.
Can 1N5351BG replace older 1N5351B in existing designs?
Yes, the 1N5351BG is a direct drop-in replacement for 1N5351B with identical electrical specifications and mechanical form factor. The only difference is the Pb-free (RoHS-compliant) termination; no layout or schematic changes are required, and soldering profiles should follow J-STD-020 for Pb-free processes.
1N5351BG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 10.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N5351BG FAQ
1.How can I place an order for 1N5351BG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5351BG 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 1N5351BG reliable?
The price and inventory of 1N5351BG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5351BG is usually 5 days.
3.What payment methods are accepted for 1N5351BG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5351BG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5351BG?
1N5351BG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5351BG 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 1N5351BG?
For technical support, including 1N5351BG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5351BG requirements.
6.How does Aetrix verify that 1N5351BG is sourced from the original manufacturer or authorized distributors?
All 1N5351BG 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 1N5351BG meets industry standards.
7.What is the process for return or replacement of 1N5351BG?
All 1N5351BG units undergo pre-shipment inspection (PSI). If there is an issue with 1N5351BG, 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 1N5351BG part is unused and in its original packaging.
Return procedure for 1N5351BG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5351BG 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
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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…
