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Renesas HZC33TRF-E
- Part No.:
- HZC33TRF-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZC33TRF-E.pdf
- Description:
- DIODE ZENER
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Inventory:12,000
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Product details
Overview
HZC33TRF-E from Renesas Electronics is a silicon epitaxial planar Zener diode optimized for surge absorption in low-power signal and interface protection circuits, with a nominal Zener voltage of 33 V, 2 mA test current, 80 Ω dynamic resistance, 250 mW peak pulse power capability, and ultra-small UFP (SC-79) surface-mount package. It serves as a transient voltage suppressor in I/O line protection for industrial sensors and microcontroller peripherals.
For engineers reviewing the HZC33TRF-E datasheet, HZC33TRF-E pinout, HZC33TRF-E application, or HZC33TRF-E equivalent, key selection criteria include its 31–35 V Zener voltage range at 2 mA, ±0.5 µA reverse leakage at 25 V, −55 to +150 °C storage temperature rating, and ESD robustness per IEC 61000-4-2 (±30 kV contact discharge).
Technical Context
The HZC33TRF-E operates as a precision voltage reference and clamping device in reverse-biased mode, leveraging epitaxial planar junction technology for stable breakdown characteristics and low temperature coefficient (≈+0.07 %/°C near 33 V). Its design targets fast response to transient overvoltage events without latch-up or thermal runaway under defined pulse conditions (Pw = 40 ms).
It is rated for 150 mW steady-state power dissipation at 25 °C ambient, derating linearly to zero at 150 °C junction temperature, and features a cathode-marked two-terminal configuration with no internal series resistance or integrated capacitance beyond intrinsic junction values.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 31.0–35.0 V at IZ = 2 mA - defines clamping threshold for overvoltage protection in 3.3 V/5 V system I/O rails. |
| Dynamic Resistance (rd) | 80 Ω max at IZ = 2 mA - determines voltage deviation under varying surge current; lower rd improves regulation tightness. |
| Reverse Leakage (IR) | ≤0.5 µA at VR = 25 V - ensures minimal standby current in always-on protection circuits. |
| ESD Capability | ±30 kV (contact), per IEC 61000-4-2 - qualifies for direct integration into unshielded user-interface ports. |
| Power Dissipation (Pd) | 150 mW at Ta = 25 °C - sets maximum continuous DC power handling before thermal derating applies. |
| Junction Temperature (Tj) | −55 to +150 °C - supports operation in extended industrial environments including motor control enclosures. |
Pinout & Package
Package: Ultra Small Flat Lead (UFP), JEITA code SC-79, Renesas code PWSF0002ZA-A, dimensions 1.70 × 1.20 × 0.60 mm (L × W × H), mass 0.0016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to protected node (e.g., MCU input); carries surge current during clamping event. |
| 2 | Anode | Connected to ground or lower-potential rail; completes clamping path and establishes reference potential. |
Key Features
| Feature | Design Value |
|---|---|
| Surge Absorption Optimization | Rated for repetitive 40 ms pulses up to 250 mW peak-enables reliable suppression of EFT/burst transients per IEC 61000-4-4. |
| Surface-Mount Compatibility | UFP (SC-79) footprint allows high-density placement on compact PCBs without through-hole drilling or reflow compatibility issues. |
| Low-Temperature Drift | +0.07 %/°C Zener voltage TC near 33 V-minimizes clamping voltage shift across −40 to +85 °C operating range. |
| Taped Delivery | Supplied in EIA-481-compliant carrier tape-supports automated pick-and-place assembly at >10,000 units/hour throughput. |
Applications
| Industrial Sensor Interface Protection | Microcontroller GPIO Clamping |
|---|---|
Use Scenario: Protecting analog voltage inputs of 24 V industrial pressure sensors against induced surges from nearby relay switching or motor drives. IC Role / Device Role / Timing Role: Zener diode clamping element placed between sensor output and ADC input, referenced to system ground. Use Value: Limits input voltage to ≤35 V during transients, preventing ADC damage while maintaining <0.5 µA leakage during normal 0–10 V operation. | Use Scenario: Safeguarding 3.3 V GPIO pins of an ARM Cortex-M4 microcontroller exposed to external push-button or LED driver connections. IC Role / Device Role / Timing Role: Standoff voltage limiter connected anode-to-ground, cathode-to-pin, activated only during overvoltage events. Use Value: Clamps fast-rising ESD strikes (≥30 kV) within nanoseconds, holding pin voltage below absolute maximum rating (4.0 V) without affecting logic-level signaling. |
| RS-485 Transceiver Bus Line Protection | USB Port VBUS Surge Suppression |
Use Scenario: Parallel-connected protection on A/B differential lines of isolated RS-485 transceivers in factory automation networks. IC Role / Device Role / Timing Role: Bidirectional transient suppressor (used in back-to-back pair) limiting common-mode overvoltage on bus conductors. Use Value: Withstands repeated 1 kV EFT bursts per IEC 61000-4-4 while adding <0.5 pF parasitic capacitance-no data rate degradation at 10 Mbps. | Use Scenario: Secondary overvoltage clamp on USB 2.0 VBUS line downstream of primary fuse and TVS, targeting residual spikes after primary suppression. IC Role / Device Role / Timing Role: Precision Zener reference shunt placed between VBUS and ground to activate only above 33 V, avoiding false triggering during 5.25 V tolerance excursions. Use Value: Provides deterministic 33 V clamping threshold with ±2 V tolerance-complements primary 6.8 V TVS by covering higher-energy, slower-rising transients. |
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 |
|---|---|---|---|
| BZX55-C33 (ON Semiconductor) | DO-35 glass package, 500 mW Pd, 32–34 V VZ range at 5 mA, higher rd (100 Ω) | Through-hole mounting; less suitable for high-density SMT layouts; better for high-pulse-energy but lower board-area-constrained designs | Select when legacy through-hole assembly or higher single-pulse energy handling (>500 mW) is required. |
| SMBJ33A (Littelfuse) | Surface-mount TVS diode, 600 W peak power, 36.7 V VBR, bidirectional, 1.5 nF junction capacitance | Designed for high-energy lightning surges (IEC 61000-4-5), not precision clamping; higher capacitance limits high-speed signal use | Select for primary-level AC/DC input or Ethernet port protection where sub-ns response and 600 W surge rating outweigh low-capacitance needs. |
Compared with BZX55-C33 and SMBJ33A, the HZC33TRF-E delivers tighter Zener voltage tolerance (±2 V vs. ±1 V for BZX55-C33 at different test current), lower parasitic capacitance (<0.5 pF), and optimized UFP footprint for space-constrained signal-line protection-making it preferable for secondary clamping in mixed-signal embedded systems.
Availability
HZC33TRF-E is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller GPIO protection, and RS-485 bus line safeguarding requiring stable component supply and consistent parametric performance across production batches.
Supply support for HZC33TRF-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and timing solutions for industrial, automotive, and infrastructure markets.
The HZC Series belongs to Renesas' discrete protection portfolio, designed specifically for low-power, high-precision surge absorption in signal-path applications where small size, tight voltage tolerance, and ESD robustness are critical.
FAQ
What is the Zener voltage tolerance of HZC33TRF-E at 2 mA test current?
The HZC33TRF-E has a guaranteed Zener voltage range of 31.0 V to 35.0 V when tested at IZ = 2 mA, corresponding to ±2.0 V absolute tolerance or approximately ±6.1 % of the nominal 33 V rating. This tolerance is specified in the Renesas HZC Series datasheet Rev.2.00 (Jul 04, 2005), page 2, Electrical Characteristics table.
Does HZC33TRF-E support bidirectional transient suppression?
No, the HZC33TRF-E is a unidirectional Zener diode configured for cathode-to-anode breakdown only. For bidirectional protection (e.g., on differential bus lines), two HZC33TRF-E devices must be connected in series opposition (anode-to-anode), as confirmed in the Pin Arrangement diagram and Absolute Maximum Ratings section of the official Renesas datasheet.
What is the maximum allowable junction temperature for HZC33TRF-E?
The maximum junction temperature (Tj) for HZC33TRF-E is 150 °C, as stated in the Absolute Maximum Ratings table on page 2 of the Renesas HZC Series datasheet. Operation beyond this limit risks permanent degradation of the epitaxial junction and irreversible increase in leakage current or Zener voltage drift.
Can HZC33TRF-E be used as a voltage reference in precision analog circuits?
The HZC33TRF-E is not recommended as a precision voltage reference due to its relatively high dynamic resistance (80 Ω max) and temperature coefficient (+0.07 %/°C), which cause significant output variation with load and ambient changes. It is engineered for surge clamping-not regulation-and lacks the stability, low noise, and tight initial tolerance expected of reference-grade Zeners like the LM385 or TL431.
Is HZC33TRF-E RoHS compliant and lead-free?
Yes, HZC33TRF-E is RoHS compliant and lead-free, consistent with Renesas Electronics' environmental policy and the EU RoHS Directive. The device uses lead-free solderable terminations and meets all substance restrictions outlined in the Renesas Environmental Report dated July 2005, and subsequent compliance declarations available via the Renesas website.
HZC33TRF-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:
- -
HZC33TRF-E FAQ
1.How can I place an order for HZC33TRF-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZC33TRF-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 HZC33TRF-E reliable?
The price and inventory of HZC33TRF-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZC33TRF-E is usually 5 days.
3.What payment methods are accepted for HZC33TRF-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZC33TRF-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZC33TRF-E?
HZC33TRF-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZC33TRF-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 HZC33TRF-E?
For technical support, including HZC33TRF-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZC33TRF-E requirements.
6.How does Aetrix verify that HZC33TRF-E is sourced from the original manufacturer or authorized distributors?
All HZC33TRF-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 HZC33TRF-E meets industry standards.
7.What is the process for return or replacement of HZC33TRF-E?
All HZC33TRF-E units undergo pre-shipment inspection (PSI). If there is an issue with HZC33TRF-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 HZC33TRF-E part is unused and in its original packaging.
Return procedure for HZC33TRF-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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