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Taiwan Semiconductor Corporation BZT52C20-G RHG
- Part No.:
- BZT52C20-G RHG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C20-G RHG.pdf
- Description:
- DIODE ZENER 20V 350MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
BZT52C20-G RHG from Taiwan Semiconductor is a surface-mount 20 V ±5% Zener diode in SOD-123 package, rated for 350 mW power dissipation and 5 mA test current, with 55 Ω dynamic impedance at IZT, used for precision voltage regulation in low-power analog and digital supply rails.
For engineers reviewing the BZT52C20-G RHG datasheet, BZT52C20-G RHG pinout, BZT52C20-G RHG application, or BZT52C20-G RHG equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (357 °C/W), junction temperature range (–55 to +150 °C), leakage current (≤0.1 µA at 14.0 V), and RoHS/halogen-free compliance for industrial and consumer PCB designs.
Technical Context
The BZT52C20-G RHG operates as a single-die, cathode-banded Zener diode optimized for stable reverse-breakdown regulation at nominal 20 V. Its 55 Ω zener impedance at 5 mA and –2.0 mV/°C temperature coefficient ensure predictable clamping under varying load and ambient conditions.
Designed for SOD-123 footprint compatibility, it supports reflow soldering per J-STD-002, meets JESD201 Class 1A whisker resistance, and delivers 10.55 mg weight and UL 94V-0 mold compound - enabling compact, reliable integration into space-constrained power management circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8–21.2 V @ 5 mA - tight ±5% tolerance enables accurate reference generation without post-calibration. |
| Power Dissipation (PD) | 350 mW - defines maximum continuous steady-state power handling at TA = 25 °C. |
| Zener Impedance (ZZT) | 55 Ω @ 5 mA - low dynamic resistance ensures minimal output voltage variation under load transients. |
| Junction Temperature Range | –55 to +150 °C - supports operation in extended industrial environments including automotive under-hood zones. |
| Leakage Current (IR) | ≤0.1 µA @ 14.0 V - guarantees negligible standby current draw in battery-powered sensing nodes. |
| Forward Voltage (VF) | 0.9 V @ 10 mA - allows use as low-drop rectifier or ESD clamp in bidirectional protection schemes. |
| Thermal Resistance (RθJA) | 357 °C/W - determines junction-to-ambient temperature rise; requires adequate copper pour for full PD utilization. |
Pinout & Package
Package: SOD-123 - surface-mount plastic case with cathode band marking; dimensions per JEDEC DO-213AA; matte tin-plated leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node during regulation. | Enables standard orientation on PCB with cathode band aligned to ground-referenced side of shunt regulator. |
| Cathode | Current exit terminal in forward bias; connected to higher-potential node during Zener operation. | Marked by visible band; must be tied to regulated voltage rail to maintain stable breakdown conduction. |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Reduces need for external trimming in 20 V reference circuits, improving yield in high-volume consumer power supplies. |
| SOD-123 package with level-1 moisture sensitivity | Eliminates bake requirements before reflow, lowering manufacturing cost and cycle time for automated assembly. |
| RoHS-compliant and halogen-free | Meets IEC 61249-2-21 and global environmental directives, supporting export compliance for CE-marked end equipment. |
| 150 °C maximum junction temperature | Permits operation in thermally dense layouts such as DC-DC converter feedback networks without derating. |
Applications
| Overvoltage Protection | Reference Voltage Source |
|---|---|
Use Scenario: Clamping transient surges on 24 V industrial I/O lines exposed to inductive switching noise. IC Role / Device Role / Timing Role: Shunt regulator absorbing excess energy above 20 V threshold to protect downstream logic inputs. Use Value: Prevents latch-up in microcontroller GPIOs by limiting voltage excursion to ≤21.2 V with <0.1 µA leakage below clamp point. |
Use Scenario: Providing stable 20 V reference for ADC biasing in portable data loggers powered by Li-ion batteries. IC Role / Device Role / Timing Role: Precision voltage reference element in ratiometric sensor excitation circuitry. Use Value: Delivers ±5% accuracy over –40 to +85 °C ambient, eliminating need for calibration firmware compensation. |
| Power Supply Regulation | ESD Clamp Network |
Use Scenario: Regulating auxiliary 20 V rail for op-amp biasing in audio preamplifier modules. IC Role / Device Role / Timing Role: Low-power shunt regulator maintaining constant voltage across decoupling capacitors. Use Value: Maintains 350 mW dissipation limit while delivering stable 20 V ±0.2 V under 1–10 mA load variation. |
Use Scenario: Bidirectional ESD protection on USB 2.0 D+/D– lines interfacing with 3.3 V PHY controllers. IC Role / Device Role / Timing Role: Low-capacitance Zener pair (anode-cathode tied) providing symmetric ±20 V clamping. Use Value: Leverages 0.9 V forward drop and 21.2 V reverse breakdown to suppress ±8 kV HBM transients without signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5242B-7-F | 20 V ±5%, 350 mW, SOT-23 package; higher RθJA (400 °C/W); 100 Ω ZZT @ 20 mA. | Requires larger thermal pad for same power handling; less stable regulation under fast load steps. | Prefer when SOT-23 footprint is fixed and board area permits additional copper thermal relief. |
| 1N4744A | 14 V nominal, ±5%, 1 W, DO-41 through-hole; not surface-mount; 20 Ω ZZT @ 25 mA. | Not suitable for automated SMT assembly; incompatible with SOD-123 land pattern. | Select only for legacy through-hole designs where rework to SMD is impractical and higher power is required. |
Compared with MMBZ5242B-7-F and 1N4744A, the BZT52C20-G RHG offers optimal balance of SMD compatibility, thermal performance (357 °C/W), and regulation stability (55 Ω ZZT) for modern low-profile, high-density PCBs requiring precise 20 V clamping.
Availability
BZT52C20-G RHG is available at Aetrix Electronics and suitable for industrial control interfaces, portable instrumentation power rails, and consumer USB peripheral protection circuits requiring stable component supply and full RoHS/halogen-free compliance.
Supply support for BZT52C20-G RHG 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 power devices, analog ICs, and protection components for industrial, computing, and consumer markets.
The BZT52C series was developed to deliver high-precision, low-cost Zener regulation in standardized SMD packages - targeting cost-sensitive, high-volume applications like AC-DC adapter feedback networks and sensor signal conditioning.
FAQ
What is the exact zener voltage range for BZT52C20-G RHG?
The BZT52C20-G RHG has a guaranteed zener voltage range of 18.8 V to 21.2 V at 5 mA test current, reflecting its ±5% tolerance specification. This range is validated per Taiwan Semiconductor's C2007 datasheet revision and applies under standard ambient conditions (TA = 25 °C). The BZT52C20-G RHG maintains this tolerance across its qualified operating temperature range.
Is BZT52C20-G RHG compatible with lead-free reflow soldering?
Yes, the BZT52C20-G RHG is fully compatible with lead-free reflow soldering processes. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its SOD-123 package is rated for moisture sensitivity level 1 per J-STD-020 - meaning no baking is required prior to assembly. The BZT52C20-G RHG withstands peak reflow temperatures up to 260 °C.
What is the maximum leakage current specification for BZT52C20-G RHG?
The BZT52C20-G RHG specifies a maximum leakage current of 0.1 µA at 14.0 V reverse bias (VR), measured at TA = 25 °C. This ultra-low leakage supports energy-efficient designs, especially in battery-backed systems where standby current must remain below 100 nA. The BZT52C20-G RHG maintains this performance across its full storage temperature range.
Does BZT52C20-G RHG have halogen-free certification?
Yes, the BZT52C20-G RHG is certified halogen-free in accordance with IEC 61249-2-21. Its molding compound contains no brominated or chlorinated flame retardants, and all materials comply with Taiwan Semiconductor's green product standards. This certification is documented in the official BZT52C2V4-G–BZT52C75-G datasheet (Version C2007) for the BZT52C20-G RHG.
What is the thermal resistance (RθJA) of BZT52C20-G RHG?
The BZT52C20-G RHG has a typical junction-to-ambient thermal resistance of 357 °C/W under standard JEDEC test conditions (single-layer 1 in² copper pad, no airflow). This value directly impacts allowable power dissipation at elevated ambient temperatures - for example, at TA = 70 °C, maximum usable PD drops to ~280 mW. The BZT52C20-G RHG datasheet provides full derating curves for design validation.
BZT52C20-G RHG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 14 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
BZT52C20-G RHG FAQ
1.How can I place an order for BZT52C20-G RHG through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C20-G RHG 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 BZT52C20-G RHG reliable?
The price and inventory of BZT52C20-G RHG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C20-G RHG is usually 5 days.
3.What payment methods are accepted for BZT52C20-G RHG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C20-G RHG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C20-G RHG?
BZT52C20-G RHG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C20-G RHG 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 BZT52C20-G RHG?
For technical support, including BZT52C20-G RHG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C20-G RHG requirements.
6.How does Aetrix verify that BZT52C20-G RHG is sourced from the original manufacturer or authorized distributors?
All BZT52C20-G RHG 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 BZT52C20-G RHG meets industry standards.
7.What is the process for return or replacement of BZT52C20-G RHG?
All BZT52C20-G RHG units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C20-G RHG, 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 BZT52C20-G RHG part is unused and in its original packaging.
Return procedure for BZT52C20-G RHG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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