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Vishay General Semiconductor - Diodes Division SMAZ5944B-E3/61
- Part No.:
- SMAZ5944B-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAZ5944B-E3/61.pdf
- Description:
- DIODE ZENER 62V 500MW DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:12,638
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Product details
Overview
SMAZ5944B-E3/61 from Vishay General Semiconductor is a surface-mount Zener voltage-regulating diode with nominal Zener voltage 62 V, 100 mA maximum DC Zener current, 1500 mW power dissipation at TL = 75 °C, and SMA (DO-214AC) package. It provides precise voltage regulation in power supply feedback loops and overvoltage protection circuits for industrial DC-DC converters.
For engineers reviewing the SMAZ5944B-E3/61 datasheet, SMAZ5944B-E3/61 pinout, SMAZ5944B-E3/61 application, or SMAZ5944B-E3/61 equivalent, key selection criteria include Zener voltage tolerance (±5 %), low Zener impedance (6.0 Ω at IZT), thermal resistance (50 °C/W junction-to-lead), and RoHS-compliant matte tin-plated terminals suitable for automated SMT assembly.
Technical Context
This device operates as a single-element, cathode-banded Zener regulator optimized for stable reverse-bias breakdown at 62 V nominal. Its low dynamic impedance (6.0 Ω at 100 mA test current) and tight voltage tolerance support accurate reference generation in closed-loop regulation systems.
Designed for surface-mount use on PCBs with 5.0 mm × 5.0 mm copper pads per terminal, it meets MSL Level 1 per J-STD-020 (260 °C peak reflow), features UL 94 V-0 molding compound, and sustains operation across -65 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 58.9 V min / 62 V nom / 65.1 V max at 100 mA - defines regulation setpoint with ±5 % tolerance |
| Zener Impedance (ZZT) | 6.0 Ω max at IZT = 100 mA - ensures minimal output voltage deviation under load transients |
| Max DC Zener Current (IZM) | 24 mA - sets absolute upper limit for continuous conduction without thermal runaway |
| Power Dissipation (Ptot) | 1500 mW at TL = 75 °C - enables high-power clamping when mounted on thermally robust PCB pads |
| Junction-to-Lead Thermal Resistance | 50 °C/W - supports reliable heat transfer to PCB copper, critical for sustained 1 W+ operation |
| Reverse Leakage Current | 1 μA max at VR = 47.1 V - guarantees low standby power loss in high-impedance bias networks |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, single-diode configuration with cathode indicated by color band. Dimensions per Vishay outline drawing: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), 0.208" × 0.157" × 0.090".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse bias reference node | Connected to lower-potential rail in shunt regulation; forms return path during Zener conduction |
| Cathode | Zener breakdown output / Regulation reference point | Provides stable 62 V reference relative to anode; marked with visible color band for orientation |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMA package | Enables compact board layout and compatibility with standard SMT pick-and-place equipment |
| Low Zener impedance | 6.0 Ω max ensures <100 mV output shift under 100 mA load step, critical for precision references |
| MSL Level 1 rating | Supports single-pass 260 °C reflow without popcorn or delamination risk |
| UL 94 V-0 molding compound | Meets flammability safety requirements for industrial and power electronics enclosures |
Applications
| Industrial Power Supply Feedback | Overvoltage Clamp for DC-DC Converters |
|---|---|
Use Scenario: Regulating output voltage of isolated flyback converter via optocoupler feedback network. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold in secondary-side control loop. Use Value: Tight 62 V tolerance and 6.0 Ω ZZT maintain ±1 % output regulation across line/load variations. | Use Scenario: Protecting 48 V intermediate bus against transient surges exceeding 70 V. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess energy to ground during overvoltage events. Use Value: 1500 mW power handling at TL = 75 °C allows sustained clamping without thermal failure. |
| Programmable Voltage Reference | ESD-Suppressed Sensor Interface Protection |
Use Scenario: Providing stable 62 V reference for high-voltage ADC biasing in battery management systems. IC Role / Device Role / Timing Role: Precision voltage source establishing known potential for analog front-end scaling. Use Value: Low 1 μA leakage at 47.1 V ensures minimal current draw from high-impedance reference dividers. | Use Scenario: Safeguarding analog inputs of microcontrollers connected to 60 V-rated industrial sensors. IC Role / Device Role / Timing Role: Secondary-level overvoltage protector placed after primary TVS devices. Use Value: Cathode-band polarity marking prevents misorientation during manual repair or prototyping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C62LT1G | Lower power rating (300 mW), SOT-23 package, ±5 % VZ tolerance, 60 Ω ZZT | Not suitable for >300 mW continuous dissipation; limited to low-current reference use | Select when board space is constrained and power demand is ≤100 mW |
| 1N5365B | Through-hole DO-41 package, 5 W rating, ±5 % VZ, 1.5 Ω ZZT, higher thermal mass | Requires through-hole assembly; better for high-reliability, high-pulse-energy clamping | Select when legacy through-hole design or >2 W surge handling is required |
Compared with BZX84-C62LT1G and 1N5365B, SMAZ5944B-E3/61 delivers optimal balance of SMT compatibility, 1500 mW thermal capability at lead temperature, and 6.0 Ω low-impedance regulation-making it ideal for modern industrial power supplies where automated assembly and mid-power clamping coexist.
Availability
SMAZ5944B-E3/61 is available at Aetrix Electronics and suitable for industrial power supplies, DC-DC converter protection, and programmable voltage reference circuits requiring stable component supply, consistent RoHS compliance, and MSL Level 1 reflow readiness.
Supply support for SMAZ5944B-E3/61 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
Vishay General Semiconductor is a global supplier of discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and optoelectronics with emphasis on reliability and application-specific performance.
The SMAZ59xxB series is engineered for surface-mount voltage regulation and transient suppression in industrial, telecom, and automotive power systems-delivering tight Zener tolerances and robust thermal performance in the SMA package.
FAQ
What is the nominal Zener voltage of the SMAZ5944B-E3/61?
The SMAZ5944B-E3/61 has a nominal Zener voltage of 62 V, with a guaranteed range of 58.9 V to 65.1 V at a test current of 100 mA. This value is specified per Vishay's datasheet revision 31-May-2023, Document Number 89416, and reflects the device's role as a precision shunt regulator in feedback and protection circuits. The SMAZ5944B-E3/61 maintains this voltage with low dynamic impedance for stable operation under varying load conditions.
Does the SMAZ5944B-E3/61 support lead-free reflow soldering?
Yes, the SMAZ5944B-E3/61 is RoHS-compliant and rated MSL Level 1 per J-STD-020, supporting peak reflow temperatures up to 260 °C. Its matte tin-plated leads are solderable per J-STD-002 and JESD22-B102, and the E3 suffix confirms industrial-grade, halogen-free construction. The SMAZ5944B-E3/61 is qualified for standard Pb-free SMT processes without preconditioning or special handling.
What is the maximum power dissipation of the SMAZ5944B-E3/61 at ambient temperature?
The SMAZ5944B-E3/61 dissipates up to 500 mW at TA = 25 °C, but its rated power increases to 1500 mW when lead temperature (TL) is maintained at 75 °C-achievable using 5.0 mm × 5.0 mm copper pads per terminal. This dual-rating reflects real-world PCB thermal design trade-offs. The SMAZ5944B-E3/61 must be applied within these limits to avoid exceeding TJ(max) = 150 °C.
How does the Zener impedance of the SMAZ5944B-E3/61 affect regulation accuracy?
The SMAZ5944B-E3/61 exhibits a maximum Zener impedance of 6.0 Ω at IZT = 100 mA, directly determining output voltage variation under load changes: ΔVZ ≈ ZZT × ΔIZ. For example, a 50 mA load step induces <300 mV deviation. This low impedance enables tight regulation in feedback networks where stability and ripple rejection matter. The SMAZ5944B-E3/61 achieves this while maintaining low leakage and thermal resistance.
Is the SMAZ5944B-E3/61 suitable for overvoltage protection in 48 V systems?
Yes-the SMAZ5944B-E3/61 is commonly used to clamp transients above 62 V in 48 V nominal systems, such as telecom power shelves or industrial motor drives. With 1500 mW steady-state dissipation at TL = 75 °C and 24 mA maximum DC Zener current, it handles sustained overvoltage events when properly heatsinked. Its cathode-band marking and DO-214AC footprint ensure correct orientation and thermal reliability. The SMAZ5944B-E3/61 complements primary TVS devices in multi-stage protection schemes.
SMAZ5944B-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 62 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 47.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAZ5944B-E3/61 FAQ
1.How can I place an order for SMAZ5944B-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAZ5944B-E3/61 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 SMAZ5944B-E3/61 reliable?
The price and inventory of SMAZ5944B-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAZ5944B-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAZ5944B-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAZ5944B-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAZ5944B-E3/61?
SMAZ5944B-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAZ5944B-E3/61 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 SMAZ5944B-E3/61?
For technical support, including SMAZ5944B-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAZ5944B-E3/61 requirements.
6.How does Aetrix verify that SMAZ5944B-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAZ5944B-E3/61 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 SMAZ5944B-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAZ5944B-E3/61?
All SMAZ5944B-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAZ5944B-E3/61, 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 SMAZ5944B-E3/61 part is unused and in its original packaging.
Return procedure for SMAZ5944B-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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