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onsemi 3EZ15D5G
- Part No.:
- 3EZ15D5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
3EZ15D5G.pdf
- Description:
- DIODE ZENER 15V 3W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,979
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Product details
Overview
3EZ15D5G from onsemi is a 3 W axial-lead Zener diode with nominal zener voltage of 15 V (±5% tolerance), 50 Ω maximum zener impedance at 5.5 mA test current, and 1.33 A maximum DC zener current - used for precision voltage regulation and overvoltage protection in power supply feedback loops and reference circuits.
For engineers reviewing the 3EZ15D5G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DO−41 package dimensions, thermal derating behavior, surge capability (98 W @ 1 ms), and real-world design implications for stable voltage clamping under transient conditions.
Technical Context
The 3EZ15D5G operates as a silicon-oxide passivated junction Zener regulator in a DO−41 (Case 59) axial plastic package. It maintains regulation across −65°C to +200°C junction temperature range, with guaranteed steady-state power dissipation of 3 W at 75°C lead temperature and 1 W at 50°C ambient temperature.
Its electrical behavior is defined by two key test points: IZT = 5.5 mA (for VZ = 14.25–15.75 V and ZZT ≤ 50 Ω) and IZK = 0.5 mA (for ZZK ≤ 700 Ω). Reverse leakage is limited to 0.25 μA at VR = 11.4 V, and it sustains non-repetitive 98 W surge pulses per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.25–15.75 V @ IZT = 5.5 mA - defines tight ±5% regulation window for stable reference generation |
| Zener Impedance (ZZT) | ≤50 Ω @ IZT = 5.5 mA - ensures minimal output voltage variation under load current changes |
| Max DC Zener Current (IZM) | 1.33 A - sets absolute upper limit for continuous conduction without thermal runaway |
| Surge Power Rating | 98 W @ 1 ms pulse - enables robust transient suppression in line-powered circuits |
| ESD Rating | Class 3 (>16 kV HBM) - provides handling resilience during PCB assembly and field service |
| Thermal Resistance (Junction-to-Lead) | 20°C/W (L = 3/8″) - determines safe power derating when mounted to heatsink or PCB trace |
| Reverse Leakage (IR) | 0.25 μA @ VR = 11.4 V - guarantees low quiescent error in high-impedance bias networks |
Pinout & Package
3EZ15D5G uses the standard DO−41 (Case 59) axial-leaded plastic package: cathode indicated by a single black band; anode is unmarked lead. Leads are solderable per MIL-STD-202, Method 210, with max soldering temperature of 230°C at 1/16″ from case for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential rail; establishes reference point for zener breakdown |
| Cathode | Zener breakdown terminal / Regulated output node | Connected to voltage source or feedback node; delivers stable 15 V clamp when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| 3 W Power Rating in DO−41 Form Factor | Delivers 3× the power handling of conventional 1 W Zeners without increasing board footprint |
| Silicon-Oxide Passivated Junction | Ensures long-term stability and low parameter drift under thermal cycling and humidity exposure |
| Class 3 ESD Robustness (>16 kV HBM) | Eliminates need for external ESD protection in manual handling and low-speed signal paths |
| Guaranteed Limits on Six Electrical Parameters | Reduces qualification testing burden by providing production-tested VZ, IZK, ZZK, IR, ZZT, and IZM |
| Pb-Free Compliant Packaging | Meets RoHS Directive 2011/65/EU without performance trade-offs or requalification |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting precise 15 V threshold for TL431 or similar shunt regulator input. Use Value: Tight ±5% VZ tolerance and low 50 Ω dynamic impedance minimize output voltage drift across line/load/temperature. |
Use Scenario: Protecting microcontroller I/O pins from 24 V industrial transients coupled onto sensor lines. IC Role / Device Role / Timing Role: Fast-acting voltage clamp limiting pin voltage to 15.75 V peak during EFT bursts. Use Value: 98 W surge rating absorbs 1 ms transients without degradation, while 0.25 μA leakage avoids loading high-Z analog inputs. |
| DC-DC Converter Reference | Linear Regulator Pre-Regulation |
Use Scenario: Providing stable 15 V reference for adjustable buck controller ICs requiring external feedback divider. IC Role / Device Role / Timing Role: Precision voltage reference node establishing setpoint for internal error amplifier. Use Value: Low temperature coefficient (≈+3.5 mV/°C near 15 V) and 20°C/W θJL enable predictable drift compensation in closed-loop designs. |
Use Scenario: Reducing dropout voltage stress on 12 V LDOs fed from unregulated 24 V rail in automotive body control modules. IC Role / Device Role / Timing Role: Pre-regulator dropping input to ~15 V before final LDO stage, lowering thermal load. Use Value: 3 W continuous dissipation allows sustained 1.33 A current at 15 V, enabling efficient pre-regulation without heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5347B | Same 15 V nominal VZ, but 5 W rating, larger DO-204AL package, higher IZM = 1.9 A | Better suited for higher-power pre-regulation where thermal mass supports >3 W dissipation | Select 1N5347B when board layout permits larger footprint and system requires >3 W clamping margin |
| BZX85C15 | 15 V ±5%, 1.3 W rating, DO-41 package, lower IZM = 0.52 A, higher ZZT = 13 Ω | Targeted at low-power bias networks where 1.3 W suffices and cost sensitivity is high | Choose BZX85C15 only for space-constrained, low-current (<500 mA) applications with relaxed surge requirements |
Compared with 1N5347B and BZX85C15, the 3EZ15D5G uniquely balances 3 W capability in standard DO−41 size, Class 3 ESD robustness, and guaranteed six-parameter limits - making it optimal for industrial power supplies needing reliability without footprint penalty.
Availability
3EZ15D5G is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, DC-DC converter references, and linear regulator pre-regulation requiring stable component supply and full RoHS compliance.
Supply support for 3EZ15D5G 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 3EZ15D5G belongs to the Surmetic 30 Zener series - engineered for high-reliability voltage regulation in harsh environments, with emphasis on thermal stability, surge resilience, and manufacturing consistency across wide temperature ranges.
FAQ
What is the exact zener voltage tolerance for 3EZ15D5G?
The 3EZ15D5G has a guaranteed zener voltage range of 14.25 V to 15.75 V at IZT = 5.5 mA and TA = 25°C, corresponding to ±5% tolerance as indicated by the "D5" suffix. This tolerance is production-tested and specified in the official onsemi datasheet revision 4, March 2006.
Can 3EZ15D5G be used in surface-mount designs?
No - the 3EZ15D5G is strictly an axial-leaded DO−41 (Case 59) device with leads designed for through-hole mounting. It lacks SMD-compatible terminations or tape-and-reel packaging for pick-and-place. For SMT equivalents, consider SOD-123 or SMA packages like MMBZ5245B, not 3EZ15D5G.
What is the maximum allowable surge current for 3EZ15D5G?
The 3EZ15D5G supports a non-repetitive peak reverse surge current of 1.33 A (derived from 98 W @ 1 ms pulse and VZ ≈ 15 V), per JEDEC-standard waveform. This value is validated in Figure 3 of the onsemi datasheet and must not be exceeded even once without risk of parametric shift or failure.
Does 3EZ15D5G require a heatsink for 3 W operation?
At 3 W dissipation, the 3EZ15D5G requires thermal management: its junction-to-lead thermal resistance is 20°C/W (L = 3/8″), so a 60°C rise above lead temperature occurs at full power. A heatsink or thermally enhanced PCB trace is necessary if lead temperature exceeds 75°C - confirmed by Figure 1's derating curve.
Is 3EZ15D5G RoHS compliant and lead-free?
Yes - the 3EZ15D5G is offered in Pb-free packaging per onsemi's documentation. The "G" suffix denotes lead-free construction, and all electrical specifications apply identically to both standard and Pb-free versions, as stated in the March 2006 datasheet revision.
3EZ15D5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 5.5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 11.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
3EZ15D5G FAQ
1.How can I place an order for 3EZ15D5G through Aetrix?
Please submit a Request for Quotation (RFQ) for 3EZ15D5G 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 3EZ15D5G reliable?
The price and inventory of 3EZ15D5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3EZ15D5G is usually 5 days.
3.What payment methods are accepted for 3EZ15D5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3EZ15D5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3EZ15D5G?
3EZ15D5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3EZ15D5G 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 3EZ15D5G?
For technical support, including 3EZ15D5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3EZ15D5G requirements.
6.How does Aetrix verify that 3EZ15D5G is sourced from the original manufacturer or authorized distributors?
All 3EZ15D5G 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 3EZ15D5G meets industry standards.
7.What is the process for return or replacement of 3EZ15D5G?
All 3EZ15D5G units undergo pre-shipment inspection (PSI). If there is an issue with 3EZ15D5G, 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 3EZ15D5G part is unused and in its original packaging.
Return procedure for 3EZ15D5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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