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Renesas HZK33TL-S-E
- Part No.:
- HZK33TL-S-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZK33TL-S-E.pdf
- Description:
- DIODE ZENER 0.5W
- Quantity:
- Payment:
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Inventory:4,738
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Product details
Overview
HZK33TL-S-E from Renesas Electronics is a silicon epitaxial planar Zener diode designed for precision voltage regulation in stabilized power supplies. It delivers a nominal zener voltage of 33 V (min 31.2 V, max 34.6 V) at 2 mA test current, with dynamic resistance of 120 Ω, maximum power dissipation of 500 mW, and operates within –55°C to +175°C storage temperature range. It is used in industrial power supply feedback loops requiring stable reference voltage.
For engineers reviewing the HZK33TL-S-E datasheet, HZK33TL-S-E pinout, HZK33TL-S-E application, or HZK33TL-S-E equivalent, key selection criteria include zener voltage tolerance (±1.8 V), low leakage current (≤1 µA at VR = 25 V), thermal coefficient (≈+0.06 %/°C), surface-mount LLD package compatibility, and compliance with Renesas Standard quality grade for industrial equipment.
Technical Context
The HZK33TL-S-E functions as a two-terminal shunt voltage regulator, maintaining stable output voltage by conducting reverse current above its breakdown threshold. Its epitaxial planar construction ensures consistent zener impedance and low temperature drift across operating conditions.
It is rated for 2 mA zener test current and exhibits 120 Ω dynamic resistance at that point, enabling predictable regulation under varying load conditions. The device is not intended for high-frequency or transient suppression applications-its design focuses on DC and low-frequency stabilization in linear power supplies and reference circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 31.2 V to 34.6 V at IZ = 2 mA - defines regulation band for feedback control in 33 V supply rails. |
| Dynamic Resistance (rd) | 120 Ω at IZ = 2 mA - determines output voltage variation under load current changes. |
| Maximum Power Dissipation (Pd) | 500 mW - sets upper thermal limit for continuous operation on standard PCBs. |
| Reverse Current (IR) | ≤1 µA at VR = 25 V - ensures minimal quiescent current in standby or high-impedance bias networks. |
| Junction Temperature (Tj) | 175°C - supports reliable operation in enclosed industrial enclosures without active cooling. |
| Zener Voltage Temp. Coefficient | +0.06 %/°C - enables predictable drift compensation in temperature-stable references. |
Pinout & Package
Package: LLD (Leadless Low-profile Diode), JEITA-compliant surface-mount package with 0.027 g mass and 1.4 mm diameter outline. Designed for high-density PCB assembly and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated Output Reference Node | Connected to feedback input of voltage regulator IC or error amplifier; polarity-sensitive for correct biasing. |
| 2 (Anode) | Ground or Return Path | Serves as current sink path to ground or common rail; must be low-impedance for stable regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 120 Ω at 2 mA enables tight voltage regulation under ±10% load variation in 33 V supplies. |
| Wide zener voltage spectrum | Part of HZK Series covering 1.9 V–38 V, allowing standardized BOM management across multiple supply rails. |
| LLD surface-mount package | Compact 1.4 mm diameter footprint supports high-density layout and automated placement in industrial PCBs. |
| Standard quality grade | Qualified for computers, office equipment, industrial robots, and test equipment per Renesas classification. |
Applications
| Industrial Power Supply Feedback | DC-DC Converter Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converters using optocoupler-based feedback. IC Role / Device Role / Timing Role: Provides precise 33 V reference for TL431 or error amplifier bias network. Use Value: Enables ±2% output accuracy over temperature and line variations due to stable VZ and low rd. |
Use Scenario: Setting regulated output voltage in non-isolated buck converter feedback divider. IC Role / Device Role / Timing Role: Acts as stable top-divider reference node to improve ADC measurement accuracy of output voltage. Use Value: Reduces reference drift-induced error to <0.5% over –40°C to +85°C ambient. |
| Overvoltage Protection Clamp | Microcontroller Reset Circuit |
Use Scenario: Clamping surge transients on 33 V bus lines in factory automation I/O modules. IC Role / Device Role / Timing Role: Shunts excess energy during ESD or inductive kick events to protect downstream logic. Use Value: Limits peak voltage to ≤34.6 V with fast turn-on (ns-scale response), preventing latch-up in 3.3 V/5 V peripherals. |
Use Scenario: Generating clean reset signal for microcontrollers powered from 33 V intermediate rail. IC Role / Device Role / Timing Role: Supplies stable threshold voltage to reset supervisor IC or RC timing network. Use Value: Ensures deterministic reset assertion at exactly 33 V ±1.8 V, eliminating false resets during brown-out. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C33 (ON Semiconductor) | Same 33 V nominal VZ, but higher rd (130 Ω), lower Pd (500 mW same), TO-92 through-hole only. | Requires PCB redesign for through-hole mounting; less suitable for high-density SMT production. | Select when legacy through-hole assembly or cost sensitivity outweighs SMT efficiency. |
| MMSZ5258B (Diodes Inc.) | 33 V VZ, tighter tolerance (±5%), lower rd (100 Ω), same LLD-equivalent SOD-123 package, 500 mW rating. | Offers improved regulation accuracy and identical board footprint; RoHS-compliant with no lead exemption. | Preferred for new designs requiring tighter VZ tolerance and full RoHS compliance without layout change. |
Compared with BZX55C33 and MMSZ5258B, the HZK33TL-S-E provides Renesas Standard-grade qualification for industrial equipment, verified thermal stability up to 175°C junction, and documented color-coded marking (Light Blue/Light Blue/Pink) for traceability in high-reliability manufacturing.
Availability
HZK33TL-S-E is available at Aetrix Electronics and suitable for industrial power supplies, factory automation I/O modules, and test equipment requiring stable component supply with long-term lifecycle support.
Supply support for HZK33TL-S-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, with global R&D and manufacturing infrastructure.
The HZK Series was developed specifically for precision DC voltage stabilization in industrial and commercial power systems, emphasizing reliability, thermal stability, and surface-mount manufacturability.
FAQ
What is the zener voltage tolerance of HZK33TL-S-E?
The HZK33TL-S-E has a zener voltage range of 31.2 V to 34.6 V at 2 mA test current, corresponding to a ±1.8 V absolute tolerance. This specification is confirmed in the Renesas HZK Series datasheet Rev.3.00, page 3, under Electrical Characteristics for HZK33. The tolerance reflects process-controlled epitaxial layer doping and is validated across production lots.
Is HZK33TL-S-E RoHS compliant?
Yes, HZK33TL-S-E meets RoHS Directive 2011/65/EU requirements. Renesas Electronics confirms RoHS compliance for all HZK Series devices manufactured after January 2006, including HZK33TL-S-E, with lead content below 1000 ppm and no restricted substances above threshold limits. Full compliance documentation is available via Renesas' environmental portal.
What is the thermal coefficient of HZK33TL-S-E?
The HZK33TL-S-E exhibits a positive zener voltage temperature coefficient of approximately +0.06 %/°C, as shown in Figure 2 of the Renesas HZK Series datasheet Rev.3.00. This value is derived from measured data across the 33 V zener voltage point and enables accurate drift prediction in temperature-critical reference circuits.
Can HZK33TL-S-E replace HZK33 in existing designs?
Yes, HZK33TL-S-E is a direct replacement for HZK33 in all applications. The "TL-S-E" suffix denotes tape-and-reel packaging (TL), standard grade (S), and environmental compliance (E), with identical electrical specifications, LLD package dimensions, and pinout. No PCB or schematic changes are required when upgrading from HZK33 to HZK33TL-S-E.
What is the maximum reverse leakage current for HZK33TL-S-E?
The maximum reverse leakage current for HZK33TL-S-E is 1 µA at VR = 25 V, as specified in the Electrical Characteristics table on page 3 of the Renesas HZK Series datasheet Rev.3.00. This low leakage ensures minimal parasitic loading in high-impedance bias networks and improves efficiency in battery-backed or low-power reference circuits.
HZK33TL-S-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:
- -
HZK33TL-S-E FAQ
1.How can I place an order for HZK33TL-S-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZK33TL-S-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 HZK33TL-S-E reliable?
The price and inventory of HZK33TL-S-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZK33TL-S-E is usually 5 days.
3.What payment methods are accepted for HZK33TL-S-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZK33TL-S-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZK33TL-S-E?
HZK33TL-S-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZK33TL-S-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 HZK33TL-S-E?
For technical support, including HZK33TL-S-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZK33TL-S-E requirements.
6.How does Aetrix verify that HZK33TL-S-E is sourced from the original manufacturer or authorized distributors?
All HZK33TL-S-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 HZK33TL-S-E meets industry standards.
7.What is the process for return or replacement of HZK33TL-S-E?
All HZK33TL-S-E units undergo pre-shipment inspection (PSI). If there is an issue with HZK33TL-S-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 HZK33TL-S-E part is unused and in its original packaging.
Return procedure for HZK33TL-S-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZK33TL-S-E Tags
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