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Taiwan Semiconductor Corporation BZV55C4V7 L1G
- Part No.:
- BZV55C4V7 L1G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
BZV55C4V7 L1G.pdf
- Description:
- DIODE ZENER 4.7V 500MW MINI MELF
- Quantity:
- Payment:
- Shipping:
Inventory:8,345
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Product details
Overview
BZV55C4V7 L1G from Taiwan Semiconductor is a surface-mount Zener diode with nominal zener voltage 4.7 V, ±5% tolerance, 500 mW power dissipation, and 60 Ω dynamic impedance at 5 mA test current. It operates as a low-voltage reference or stabilizer in DC/DC converters and adapter circuits.
For engineers reviewing the BZV55C4V7 L1G datasheet, BZV55C4V7 L1G pinout, BZV55C4V7 L1G application, or BZV55C4V7 L1G equivalent, key selection criteria include zener voltage accuracy, thermal resistance (300 °C/W), cathode-band polarity marking, MMELF package compatibility, and leakage current ≤0.5 µA at 1.0 V reverse bias.
Technical Context
The BZV55C4V7 L1G is a single-die, hermetically sealed glass Zener diode optimized for stable voltage reference in space-constrained surface-mount designs. Its 4.7 V nominal breakdown voltage is specified at 5 mA test current (IZT), with dynamic impedance of 60 Ω and knee impedance of 600 Ω at 1.0 mA (IZK).
It features a maximum forward voltage of 1.0 V at 10 mA forward current, junction temperature range from –65 °C to +175 °C, and RoHS-compliant matte tin-plated leads solderable per J-STD-002. The MMELF package enables high-reliability mounting on compact PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ (Nominal) | 4.7 V - precise voltage reference point at 5 mA test current |
| VZ Tolerance | ±5% - ensures 4.4 V to 5.0 V regulation window under production conditions |
| PD | 500 mW - maximum continuous power dissipation at 25 °C ambient |
| ZZT @ IZT | 60 Ω - low dynamic impedance supports stable regulation under load variation |
| IR @ VR = 1.0 V | ≤0.5 µA - minimal leakage preserves efficiency in low-power standby modes |
| Junction Temp Range | –65 °C to +175 °C - suitable for industrial and automotive under-hood environments |
| RθJA | 300 °C/W - thermal performance requires adequate PCB copper area for heatsinking |
Pinout & Package
Package: MMELF (Miniature Metal Electrode Leadless Face), DO-213AA compliant, 3.50 ± 0.20 mm body length, Ø1.50 ± 0.10 mm diameter, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node; defines reverse-bias orientation for regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Marked by band; supplies regulated 4.7 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass construction | Prevents moisture ingress and long-term parameter drift in humid environments |
| ±5% VZ tolerance | Enables predictable regulation without post-production trimming in cost-sensitive designs |
| MMELF package footprint | Reduces board area vs. DO-35; compatible with standard SMT reflow profiles |
| RoHS-compliant matte tin plating | Ensures reliable solder wetting and intermetallic formation per J-STD-002 |
Applications
| Low-Voltage Stabilizers | On-Board DC/DC Converters |
|---|---|
Use Scenario: Providing stable 4.7 V bias for op-amp input stages or microcontroller reset circuits in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Voltage reference element maintaining fixed potential despite input ripple or load transients. Use Value: Tight 4.7 V ±5% tolerance and 60 Ω ZZT ensure <±10 mV output deviation across 1–10 mA load range. | Use Scenario: Acting as feedback reference in secondary-side regulation of isolated flyback converters powering industrial controllers. IC Role / Device Role / Timing Role: Precision shunt reference setting output voltage via optocoupler feedback loop. Use Value: Low 0.5 µA leakage at 1.0 V reverse bias minimizes error current injection into feedback divider network. |
| Adapters | Low-Power Sensor Signal Conditioning |
Use Scenario: Regulating auxiliary 4.7 V rail in wall-mounted AC/DC adapters for smart home hubs. IC Role / Device Role / Timing Role: Shunt regulator absorbing excess current to clamp output voltage during light-load conditions. Use Value: 500 mW power rating allows safe dissipation of up to 106 mA excess current at 4.7 V. | Use Scenario: Biasing bridge amplifiers or ADC reference inputs in portable environmental monitors. IC Role / Device Role / Timing Role: Stable analog reference source independent of supply rail fluctuations. Use Value: 300 °C/W thermal resistance permits operation up to +85 °C ambient with minimal derating on 10 mm² copper pad. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZX55C4V7 | Same 4.7 V ±5%, 500 mW rating, but DO-35 package (larger footprint, higher RθJA ≈ 500 °C/W) | Less suitable for ultra-compact layouts; requires larger pad area for thermal management | Select if legacy DO-35 footprint compatibility is required over space savings |
| Vishay BZT52-B4V7 | 4.7 V ±5%, 500 mW, SOD-123 package; VF = 0.9 V @ 10 mA (slightly lower forward drop) | Higher thermal resistance (≈400 °C/W); different polarity marking (cathode line vs. band) | Choose when SOD-123 assembly infrastructure exists and tighter forward voltage control is needed |
Compared with BZX55C4V7 and BZT52-B4V7, the BZV55C4V7 L1G offers the smallest board footprint (MMELF), lowest thermal resistance among 4.7 V Zeners in its class, and consistent cathode-band polarity identification-critical for automated optical inspection in high-volume SMT lines.
Availability
BZV55C4V7 L1G is available at Aetrix Electronics and suitable for low-voltage stabilizers, on-board DC/DC converters, and adapter applications requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for BZV55C4V7 L1G 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete devices, analog ICs, and power management solutions since 1979.
The BZV55 series belongs to TSC's precision Zener diode product line, engineered for high-stability voltage reference and regulation in industrial, computing, and consumer power systems where reliability and tight tolerance are essential.
FAQ
What is the exact zener voltage range and tolerance for BZV55C4V7 L1G?
The BZV55C4V7 L1G has a nominal zener voltage of 4.7 V with a guaranteed range of 4.4 V (min) to 5.0 V (max) at 5 mA test current, reflecting its ±5% tolerance. This specification is verified per JEDEC test conditions using 30 ms pulse testing to avoid self-heating effects. The BZV55C4V7 L1G maintains this tolerance across its qualified operating temperature range.
Does BZV55C4V7 L1G have a defined forward voltage specification?
Yes, the BZV55C4V7 L1G specifies a maximum forward voltage of 1.0 V at 10 mA forward current. This value is critical for verifying correct polarity during functional testing and for estimating power loss in forward-conducting configurations. The BZV55C4V7 L1G's forward characteristic is consistent with silicon PN-junction behavior and aligns with J-STD-002 solderability requirements.
What is the thermal resistance (RθJA) of BZV55C4V7 L1G and how does it affect layout?
The BZV55C4V7 L1G has a junction-to-ambient thermal resistance of 300 °C/W. This means that under 500 mW dissipation, the junction temperature rises ~150 °C above ambient-requiring careful PCB copper area design. The BZV55C4V7 L1G benefits from ≥25 mm² of 1 oz copper connected to both terminals to maintain safe operation at full power in still air.
Is BZV55C4V7 L1G RoHS compliant and what plating is used?
Yes, the BZV55C4V7 L1G is RoHS compliant and uses matte tin plating on its leads, qualified per J-STD-002 for solderability. This plating ensures robust intermetallic formation during reflow and eliminates lead-based finishes. The BZV55C4V7 L1G's compliance is documented in TSC's official declaration and supported by material test reports for all homogeneous substances.
How is polarity marked on the BZV55C4V7 L1G package?
Polarity is marked by a distinct cathode band on the glass body of the BZV55C4V7 L1G, aligned with the cathode terminal. This band is visible under standard AOI systems and matches JEDEC DO-213AA mechanical drawings. The BZV55C4V7 L1G's cathode-band marking ensures unambiguous orientation during pick-and-place and manual assembly, reducing misplacement risk in high-speed SMT lines.
BZV55C4V7 L1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-213AC, MINI-MELF, SOD-80
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 10 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Mini MELF
BZV55C4V7 L1G FAQ
1.How can I place an order for BZV55C4V7 L1G through Aetrix?
Please submit a Request for Quotation (RFQ) for BZV55C4V7 L1G 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 BZV55C4V7 L1G reliable?
The price and inventory of BZV55C4V7 L1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZV55C4V7 L1G is usually 5 days.
3.What payment methods are accepted for BZV55C4V7 L1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZV55C4V7 L1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZV55C4V7 L1G?
BZV55C4V7 L1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZV55C4V7 L1G 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 BZV55C4V7 L1G?
For technical support, including BZV55C4V7 L1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZV55C4V7 L1G requirements.
6.How does Aetrix verify that BZV55C4V7 L1G is sourced from the original manufacturer or authorized distributors?
All BZV55C4V7 L1G 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 BZV55C4V7 L1G meets industry standards.
7.What is the process for return or replacement of BZV55C4V7 L1G?
All BZV55C4V7 L1G units undergo pre-shipment inspection (PSI). If there is an issue with BZV55C4V7 L1G, 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 BZV55C4V7 L1G part is unused and in its original packaging.
Return procedure for BZV55C4V7 L1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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