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onsemi 1N5354B
- Part No.:
- 1N5354B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5354B.pdf
- Description:
- DIODE ZENER 17V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,603
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Product details
Overview
1N5354B from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 17 V (±5%), maximum zener impedance of 70 Ω at 2.5 mA test current, and 0.35 mA reverse leakage at 12.9 V. It operates across −65 °C to +200 °C, features ESD rating >16 kV (HBM), and is used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N5354B datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge capability (280 A @ 8.3 ms), DC power dissipation limit, and axial package compatibility with through-hole PCB layouts.
Technical Context
The 1N5354B employs a silicon-oxide passivated junction for stable breakdown characteristics and low leakage. Its zener voltage is specified at IZT = 2.5 mA with ±5% tolerance, and it maintains regulation down to IZK = 0.5 mA where dynamic impedance rises to 75 Ω.
Thermal performance is defined by θJL = 25 °C/W (junction-to-lead) at TL = 25 °C with 3/8″ lead length, and it supports pulsed operation up to +200 °C under low-duty-cycle conditions while limiting continuous operation to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.15–17.85 V @ IZT = 2.5 mA - defines regulated output voltage range under standard test conditions |
| Max Power Dissipation | 5 W @ TL = 25 °C - sets absolute DC power limit before thermal derating begins |
| Zener Impedance (ZZT) | 70 Ω max @ IZT = 2.5 mA - indicates voltage regulation stiffness under nominal bias |
| Reverse Leakage (IR) | 0.35 mA max @ VR = 12.9 V - determines quiescent current loss in high-impedance bias networks |
| Surge Current (IRM) | 280 A peak @ 8.3 ms - enables transient overvoltage clamping without failure |
| Junction-to-Lead θ | 25 °C/W - governs thermal rise from junction to PCB pad under steady-state conduction |
| ESD Rating (HBM) | >16 kV - ensures robustness during manual handling and board assembly |
Pinout & Package
Package: Axial-lead, transfer-molded plastic (Case 017AA), cathode indicated by band. Dimensions: 8.38–8.89 mm length × 3.30–3.68 mm diameter, leads 25.4–31.75 mm long.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node in reverse-biased regulation configuration |
| Cathode | Zener breakdown terminal / voltage reference node | Provides stable 17 V reference when biased above breakdown; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Silicon-oxide passivated junction | Enables tight VZ tolerance (±5%) and low long-term drift in industrial environments |
| Surge rating: 280 A @ 8.3 ms | Clamps lightning-induced transients and inductive kickback without degradation |
| ESD rating >16 kV (HBM) | Eliminates need for external ESD protection in handling-sensitive assembly lines |
| Pb-free plastic package (RoHS compliant) | Meets global environmental compliance requirements without solderability compromise |
| −65 °C to +200 °C operating range | Supports under-hood automotive, downhole, and high-temp industrial deployments |
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: Zener reference establishes precise 17 V threshold triggering error amplifier response. Use Value: Tight ±5% VZ tolerance and 70 Ω ZZT ensure <±1% output regulation accuracy across line/load/temperature. | Use Scenario: Protects microcontroller I/O pins from accidental 24 V bus exposure in factory automation PLC modules. IC Role / Device Role / Timing Role: Shunts excess voltage above 17.85 V to ground during fault events. Use Value: 280 A surge rating absorbs 8.3 ms transients per IEC 61000-4-5 Level 4 without parametric shift. |
| Programmable Voltage Reference | DC-DC Converter Trim Circuit |
Use Scenario: Sets adjustable output of LM317-based lab bench supply with 0.1% stability over 0–70 °C. IC Role / Device Role / Timing Role: Provides temperature-compensated reference point for ADJ pin bias network. Use Value: Low 0.35 mA leakage at 12.9 V minimizes error contribution in high-resistance divider arms. | Use Scenario: Fine-tunes output of fixed 12 V DC-DC module to 12.5 V in telecom power shelf applications. IC Role / Device Role / Timing Role: Injects controlled current into feedback node to offset internal reference. Use Value: 25 °C/W θJL allows direct mounting to copper pour for stable trim voltage under 100 mA load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5354 | Same electrical specs but non-Pb-free; lacks RoHS compliance documentation | Acceptable only in legacy non-RoHS production or internal prototyping | Select 1N5354B for new designs requiring Pb-free certification and full traceability |
| BZX85C16 | 1.3 W rating, 16 V nominal, 100 Ω ZZT, no surge rating specified | Suitable only for low-power signal-level clamping, not 5 W regulation | Choose BZX85C16 only when power dissipation remains below 1.3 W and surge immunity is not required |
Compared with 1N5354B, 1N5354 offers identical regulation performance but lacks Pb-free assurance, while BZX85C16 delivers lower-cost clamping at one-quarter the power handling and unverified surge resilience-making 1N5354B the sole choice for robust 5 W industrial voltage references.
Availability
1N5354B is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, programmable voltage references, and DC-DC converter trim applications requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for 1N5354B 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 supplier of energy-efficient semiconductor solutions, specializing in automotive, industrial, cloud, and IoT applications with emphasis on reliability and thermal performance.
The 1N53 Series belongs to onsemi's Surmetic 40 Zener regulator family, engineered for high-power, high-stability voltage reference and clamping in harsh-environment power systems.
FAQ
What is the nominal zener voltage and tolerance of the 1N5354B?
The 1N5354B has a nominal zener voltage of 17 V with a guaranteed tolerance of ±5%, corresponding to a minimum of 16.15 V and maximum of 17.85 V when tested at IZT = 2.5 mA and TA = 25 °C. This tolerance is JEDEC-defined and applies specifically to the "B" suffix variant per onsemi's datasheet revision 19.
What is the maximum steady-state power dissipation for the 1N5354B?
The 1N5354B has a maximum steady-state power dissipation of 5 W at lead temperature (TL) = 25 °C with 3/8″ lead length. Derating is required above 25 °C at 40 mW/°C, and the device must not exceed a junction temperature of +150 °C for continuous operation per datasheet Note 1.
Does the 1N5354B have a specified surge current rating?
Yes, the 1N5354B is rated for a peak non-repetitive surge current of 280 A at pulse width = 8.3 ms, as confirmed in Table 3 of the onsemi datasheet. This rating is validated under specified mounting conditions and supports transient suppression in industrial power interfaces.
What is the reverse leakage current specification for the 1N5354B?
The 1N5354B specifies a maximum reverse leakage current (IR) of 0.35 mA at VR = 12.9 V and TA = 25 °C. This value is measured below the zener knee and directly impacts bias network accuracy in high-impedance reference circuits.
Is the 1N5354B RoHS compliant and what package type does it use?
Yes, the 1N5354B is Pb-free and RoHS compliant, indicated by the "G" suffix in ordering codes (e.g., 1N5354BG). It uses an axial-lead, transfer-molded plastic package designated Case 017AA, with cathode identified by a band and dimensions conforming to onsemi's mechanical drawing ISSUE O.
1N5354B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 17 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 12.9 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
1N5354B FAQ
1.How can I place an order for 1N5354B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5354B 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 1N5354B reliable?
The price and inventory of 1N5354B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5354B is usually 5 days.
3.What payment methods are accepted for 1N5354B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5354B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5354B?
1N5354B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5354B 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 1N5354B?
For technical support, including 1N5354B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5354B requirements.
6.How does Aetrix verify that 1N5354B is sourced from the original manufacturer or authorized distributors?
All 1N5354B 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 1N5354B meets industry standards.
7.What is the process for return or replacement of 1N5354B?
All 1N5354B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5354B, 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 1N5354B part is unused and in its original packaging.
Return procedure for 1N5354B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5354B 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
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