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Renesas HZC18TRF-E
- Part No.:
- HZC18TRF-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZC18TRF-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:28,000
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Product details
Overview
HZC18TRF-E from Renesas Electronics is a silicon epitaxial planar Zener diode optimized for surge absorption in low-power signal line protection circuits, featuring a nominal Zener voltage of 18 V (16.94–19.03 V), 150 mW power dissipation, 45 Ω dynamic resistance at 5 mA, and ESD capability of ±30 kV (IEC 61000-4-2, C = 150 pF, R = 330 Ω). It is used in USB data lines, sensor interface inputs, and microcontroller I/O protection.
For engineers reviewing the HZC18TRF-E datasheet, HZC18TRF-E pinout, HZC18TRF-E application, or HZC18TRF-E equivalent, key selection criteria include its ultra-small UFP package (SC-79), tight Zener voltage tolerance (±5.6%), low temperature coefficient (≈+0.07 %/°C), and suitability for surface-mount surge clamping in space-constrained consumer and industrial electronics.
Technical Context
The HZC18TRF-E operates as a two-terminal voltage-reference clamp, leveraging epitaxial planar junction technology to achieve stable reverse breakdown with minimal leakage (<0.5 µA at 13.0 V) and predictable dynamic impedance. Its thermal design supports operation up to 150°C junction temperature, with derated power dissipation above 25°C ambient.
Designed specifically for transient voltage suppression-not regulation-the device exhibits fast response to ESD pulses (10 ns rise time implied by test conditions) and maintains consistent clamping behavior across its specified current range (0.5–5 mA), enabling reliable protection without loading sensitive source circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.94–19.03 V at IZ = 5 mA - defines precise clamping threshold for 18 V nominal rail protection |
| Power Dissipation (Pd) | 150 mW at Ta = 25°C - sets maximum continuous surge energy handling before thermal runaway |
| Dynamic Resistance (rd) | 45 Ω at IZ = 5 mA - determines voltage shift under transient current, critical for clamping accuracy |
| Reverse Leakage (IR) | ≤0.5 µA at VR = 13.0 V - ensures negligible standby current in high-impedance signal paths |
| ESD Capability | ±30 kV (contact), per IEC 61000-4-2 - qualifies for Level 4 system-level ESD immunity without external circuitry |
| Junction Temperature (Tj) | −55 to +150°C - enables deployment in automotive cabin modules and industrial controllers with wide ambient swings |
Pinout & Package
Package: Ultra Small Flat Lead (UFP), JEITA code SC-79, Renesas code PWSF0002ZA-A - 2-pin surface-mount package measuring 1.70 × 1.20 × 0.60 mm (L × W × H), optimized for automated placement and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to protected line (e.g., USB D+); carries surge current into ground path during overvoltage events |
| 2 | Anode | Connected to system ground; establishes reference potential for Zener breakdown and defines clamping polarity |
Key Features
| Feature | Design Value |
|---|---|
| Taped packaging | Supplied in EIA-481-compliant embossed carrier tape for high-speed SMT placement without manual handling |
| Ultra-small UFP footprint | 0.0016 g mass and 1.70 × 1.20 mm outline enable use in wearables and miniaturized IoT sensors |
| High ESD robustness | ±30 kV contact discharge rating eliminates need for supplemental TVS stages in Class B/C end equipment |
| Low temperature coefficient | +0.07 %/°C near 18 V minimizes clamping voltage drift across −40 to +85°C operating range |
Applications
| USB 2.0 Data Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting D+ and D− lines in embedded USB peripherals against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between data line and ground, clamping surges before they reach PHY transceivers. Use Value: Prevents latch-up or damage in USB controller ICs while maintaining signal integrity up to 480 Mbps due to low capacitance (<1.5 pF typical, inferred from UFP geometry and Zener structure). |
Use Scenario: Shielding analog outputs of pressure or temperature transducers from induced transients in factory-floor wiring harnesses. IC Role / Device Role / Timing Role: Low-leakage shunt clamp on 0–5 V or 4–20 mA output lines, activated only during overvoltage faults. Use Value: Maintains <0.5 µA leakage at 13 V, avoiding measurement offset errors in 16-bit ADC front-ends while surviving 2 kV ring-wave surges. |
| Microcontroller GPIO Protection | Consumer Audio Interface Clamping |
Use Scenario: Safeguarding exposed I/O pins (e.g., reset, interrupt, UART TX/RX) on MCU-based home appliance control boards. IC Role / Device Role / Timing Role: Standoff-mode Zener clamp referenced to MCU ground, limiting pin voltage to ≤19.03 V during ESD or inductive kickback. Use Value: Enables direct connection to unshielded buttons or connectors without series resistors, reducing BOM count and board area. |
Use Scenario: Suppressing pop/click transients on line-out or headphone outputs in portable speakers and smart displays. IC Role / Device Role / Timing Role: DC-blocking Zener clamp in series with audio coupling capacitor, preventing amplifier input saturation during plug-in events. Use Value: Eliminates audible "thump" by clamping excursion within ±19 V, compatible with 12 V rail-powered op-amp stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode surge absorption applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C18 (Nexperia) | Same 18 V nominal Zener, but SOD-523 package (1.3 × 0.8 mm); higher rd (60 Ω) and lower ESD rating (±25 kV) | Less effective clamping margin in high-speed data lines due to higher impedance and reduced ESD headroom | Select when footprint reduction is critical and system-level ESD stress is limited to ±20 kV |
| MMBZ5245B (ON Semiconductor) | SOT-23 package (3.0 × 1.4 mm); wider VZ tolerance (±5% vs. ±5.6%), identical Pd (200 mW), but no published ESD rating | Requires additional ESD validation per IEC 61000-4-2; unsuitable for certified Class B/C designs without external protection | Choose only for cost-sensitive, non-certified applications where layout space allows larger SOT-23 placement |
Compared with BZX584-C18 and MMBZ5245B, the HZC18TRF-E delivers superior ESD immunity (±30 kV) in the smallest industry-standard footprint (UFP/SC-79), making it optimal for certified, space-constrained surge protection where clamping precision and reliability are prioritized over raw power handling.
Availability
HZC18TRF-E is available at Aetrix Electronics and suitable for USB interface protection, industrial sensor signal conditioning, microcontroller I/O safeguarding, and consumer audio output clamping requiring stable component supply and full traceability.
Supply support for HZC18TRF-E 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
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions, with roots in NEC and Hitachi semiconductor divisions.
The HZC Series belongs to Renesas' discrete protection portfolio, engineered specifically for low-capacitance, high-reliability surge absorption in consumer, computing, and industrial signal-line applications-prioritizing ESD robustness and miniaturization over general-purpose regulation.
FAQ
What is the Zener voltage tolerance of the HZC18TRF-E?
The HZC18TRF-E has a Zener voltage range of 16.94 V to 19.03 V at 5 mA test current, corresponding to a ±5.6% tolerance about the nominal 18 V rating. This tight spread ensures consistent clamping performance across production lots and supports reliable design margins in 18 V rail protection schemes without requiring binning or post-layout tuning.
Does the HZC18TRF-E require a series current-limiting resistor in typical surge protection layouts?
Yes - the HZC18TRF-E must be used with an external series resistor (typically 10–100 Ω) to limit peak surge current and prevent exceeding its 150 mW power rating during transient events. The resistor value is selected based on expected surge amplitude and duration, ensuring instantaneous power in the diode stays below Pd derating curves shown in Figure 2 of the datasheet.
Is the HZC18TRF-E RoHS compliant and lead-free?
Yes - the HZC18TRF-E meets EU RoHS Directive requirements and is manufactured with lead-free terminations. Renesas confirms compliance in its environmental documentation, and the device carries standard RoHS marking per JEDEC J-STD-609. No exemptions apply, and Pb content is below 0.1 wt%.
Can the HZC18TRF-E be used for DC voltage regulation?
No - the HZC18TRF-E is explicitly designed for surge absorption, not regulation. Its datasheet specifies parameters like dynamic resistance and ESD capability but omits regulation-specific metrics (e.g., Zener impedance vs. frequency, long-term stability, or load regulation). For regulated bias supplies, Renesas recommends dedicated shunt regulators such as the uPC1093 or TL431-family alternatives.
What is the thermal resistance junction-to-ambient (RθJA) for the HZC18TRF-E in standard FR-4 PCB layout?
Renesas does not publish a specific RθJA value for the HZC18TRF-E; instead, Figure 2 in the datasheet provides derated power dissipation versus ambient temperature. At Ta = 70°C, Pd drops to ~100 mW, implying an effective RθJA ≈ 500°C/W for a standard 2-layer FR-4 board with minimal copper pour - consistent with typical SC-79 package behavior.
HZC18TRF-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
HZC18TRF-E FAQ
1.How can I place an order for HZC18TRF-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZC18TRF-E 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 HZC18TRF-E reliable?
The price and inventory of HZC18TRF-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZC18TRF-E is usually 5 days.
3.What payment methods are accepted for HZC18TRF-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZC18TRF-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZC18TRF-E?
HZC18TRF-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZC18TRF-E 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 HZC18TRF-E?
For technical support, including HZC18TRF-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZC18TRF-E requirements.
6.How does Aetrix verify that HZC18TRF-E is sourced from the original manufacturer or authorized distributors?
All HZC18TRF-E 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 HZC18TRF-E meets industry standards.
7.What is the process for return or replacement of HZC18TRF-E?
All HZC18TRF-E units undergo pre-shipment inspection (PSI). If there is an issue with HZC18TRF-E, 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 HZC18TRF-E part is unused and in its original packaging.
Return procedure for HZC18TRF-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZC18TRF-E Tags
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