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Renesas HZS33-1TD-E
- Part No.:
- HZS33-1TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS33-1TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
HZS33-1TD-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power stabilized power supplies, featuring a nominal zener voltage of 33 V (min 33.2 V, max 34.6 V at IZ = 2 mA), 400 mW power dissipation, and low dynamic impedance of 120 Ω at 2 mA - deployed in industrial control power rails and sensor biasing circuits.
For engineers reviewing the HZS33-1TD-E datasheet, HZS33-1TD-E pinout, HZS33-1TD-E application, or HZS33-1TD-E equivalent, key selection criteria include zener voltage tolerance (±2.3% at 33 V), temperature coefficient (−0.05 %/°C), junction temperature rating (200°C), and MHD package compatibility with 5 mm-pitch automated insertion.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage by conducting reverse current above its specified breakdown threshold. Its planar silicon construction ensures consistent VZ distribution across grades and low leakage (<1 µA at VR = 0.5×VZ).
The HZS33-1TD-E exhibits a negative temperature coefficient (−0.05 %/°C), meaning VZ decreases slightly with rising temperature - a critical factor when used in temperature-sensitive reference circuits or ambient-compensated designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33.2 V to 34.6 V at IZ = 2 mA - defines regulated output range under nominal bias; ±2.3% tolerance supports mid-precision references. |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - sets maximum continuous power handling before thermal derating; enables use in compact PCB layouts without forced cooling. |
| Dynamic Resistance (rd) | 120 Ω at IZ = 2 mA - determines load regulation sensitivity; lower rd improves voltage stability against current variations. |
| Reverse Leakage Current (IR) | <1 µA at VR = 16.5 V - minimizes quiescent error in high-impedance bias networks and reduces standby power loss. |
| Junction Temperature (Tj) | 200°C maximum - allows operation in high-ambient environments such as enclosed industrial enclosures or near heat-generating components. |
| Temperature Coefficient (γZ) | −0.05 %/°C - quantifies VZ drift per degree Celsius; enables predictable compensation in temperature-stable references. |
Pinout & Package
Package: MHD (JEITA code GRZZ0002ZC-A), molded plastic case with axial leads, 2.0 mm diameter, 26 mm body length, 5 mm lead pitch - optimized for high-speed automatic insertion and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side reference terminal | Connected to regulated output node; polarity marking (lake blue band) identifies cathode for correct orientation in shunt configuration. |
| 2 (Anode) | Low-side return terminal | Connected to ground or common reference; completes current path during zener conduction; must be routed with low-inductance trace in noise-sensitive applications. |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 120 Ω at 2 mA enables tight regulation under varying load currents - critical for analog sensor excitation and ADC reference buffering. |
| Wide VZ spectrum (1.6–38 V) | Supports single-family sourcing across multiple voltage rails - simplifies BOM management for multi-rail industrial power supplies. |
| 400 mW power rating | Provides sufficient headroom for transient overvoltage clamping and sustained regulation in 5–24 V auxiliary supplies without external heatsinking. |
| MHD package with 5 mm pitch | Ensures compatibility with legacy pick-and-place equipment and through-hole reflow processes - reduces manufacturing changeover cost. |
Applications
| Industrial Power Monitoring | Automotive Sensor Biasing |
|---|---|
Use Scenario: Monitoring 24 V DC bus voltage in PLC backplanes using resistive divider + comparator. IC Role / Device Role / Timing Role: Precision shunt reference providing stable 33 V threshold for overvoltage detection circuitry. Use Value: Tight VZ tolerance and low rd ensure trip point accuracy remains within ±0.8 V across temperature and aging - reducing false alarms. |
Use Scenario: Supplying stable bias to piezoresistive pressure sensors in engine control modules. IC Role / Device Role / Timing Role: Low-noise voltage reference source for Wheatstone bridge excitation. Use Value: Sub-1 µA leakage prevents loading of high-impedance sensor outputs, preserving measurement linearity and SNR. |
| Medical Instrumentation Power Rails | Telecom Line Card Protection |
Use Scenario: Regulating isolated 30 V auxiliary supply for op-amp front-ends in patient-monitor ECG amplifiers. IC Role / Device Role / Timing Role: Secondary shunt regulator stabilizing post-isolation DC/DC output. Use Value: 200°C Tj rating allows reliable operation adjacent to isolated DC/DC converters without thermal throttling. |
Use Scenario: Overvoltage clamping on 48 V telecom line interface cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting transient spikes to ≤36 V. Use Value: 400 mW Pd sustains short-duration surge energy without catastrophic failure - extends system uptime between maintenance cycles. |
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 |
|---|---|---|---|
| 1N4745A (ON Semiconductor) | VZ = 33 V ±5%, rd = 35 Ω, Pd = 1 W, DO-41 package | Higher power and lower impedance but larger footprint and looser tolerance - suitable where thermal margin > regulation precision is prioritized. | Select when board space permits larger DO-41 and higher surge energy absorption is required. |
| BZX55C33 (Vishay) | VZ = 33 V ±5%, rd = 50 Ω, Pd = 500 mW, DO-35 package | Similar power rating but tighter rd and standard DO-35 footprint - lacks MHD's 5 mm pitch automation compatibility. | Choose for legacy DO-35 layouts or where lower dynamic impedance outweighs automated assembly requirements. |
Compared with 1N4745A and BZX55C33, the HZS33-1TD-E trades absolute impedance and power for tighter VZ tolerance (±2.3%), MHD package automation readiness, and superior thermal robustness - making it optimal for space-constrained, high-volume industrial controls requiring repeatable regulation performance.
Availability
HZS33-1TD-E is available at Aetrix Electronics and suitable for industrial control systems, sensor signal conditioning circuits, and telecom power supervision requiring stable component supply, long-term lifecycle continuity, and RoHS-compliant packaging.
Supply support for HZS33-1TD-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 for industrial, automotive, and infrastructure markets.
The HZS Series belongs to Renesas' discrete voltage reference product line, engineered specifically for high-reliability, low-drift shunt regulation in cost-sensitive, high-volume power management applications.
FAQ
What is the exact zener voltage range for HZS33-1TD-E at 2 mA test current?
The HZS33-1TD-E has a guaranteed zener voltage range of 33.2 V to 34.6 V when tested at IZ = 2 mA, corresponding to Grade "-3" in the HZS33 family per REJ03G0184-0500 Rev.5.00. This ±2.3% tolerance is tighter than standard 5% Zeners, supporting higher-accuracy reference designs without trimming.
Does HZS33-1TD-E support automated PCB assembly?
Yes, the HZS33-1TD-E uses the MHD package (JEITA code GRZZ0002ZC-A) with 5 mm lead pitch and axial lead geometry, explicitly qualified for high-speed automatic insertion per the datasheet. Its 2.0 mm diameter and 26 mm body length conform to standard tape-and-reel feeding specifications for SMT-compatible through-hole placement equipment.
What is the maximum junction temperature rating for HZS33-1TD-E?
The HZS33-1TD-E is rated for a maximum junction temperature (Tj) of 200°C, enabling reliable operation in thermally demanding environments such as enclosed industrial drives or proximity to power MOSFETs. Derating begins above 25°C ambient per the published power dissipation vs. temperature curve on page 5 of REJ03G0184-0500.
How does the temperature coefficient of HZS33-1TD-E affect circuit stability?
HZS33-1TD-E has a temperature coefficient of −0.05 %/°C, meaning its zener voltage decreases by approximately 16.5 mV per °C rise. In precision references, this drift must be compensated via circuit topology (e.g., series combination with positive-TC components) or operating-point selection to maintain <±0.1% total variation over −40°C to +125°C ambient.
Is HZS33-1TD-E RoHS compliant and halogen-free?
Yes, HZS33-1TD-E complies with EU RoHS Directive 2011/65/EU and is halogen-free per Renesas' environmental policy. The MHD package uses lead-free molding compound and tin-plated leads, with full compliance documentation available through Renesas' official product pages and material declarations.
HZS33-1TD-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:
- -
HZS33-1TD-E FAQ
1.How can I place an order for HZS33-1TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS33-1TD-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 HZS33-1TD-E reliable?
The price and inventory of HZS33-1TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS33-1TD-E is usually 5 days.
3.What payment methods are accepted for HZS33-1TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS33-1TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS33-1TD-E?
HZS33-1TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS33-1TD-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 HZS33-1TD-E?
For technical support, including HZS33-1TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS33-1TD-E requirements.
6.How does Aetrix verify that HZS33-1TD-E is sourced from the original manufacturer or authorized distributors?
All HZS33-1TD-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 HZS33-1TD-E meets industry standards.
7.What is the process for return or replacement of HZS33-1TD-E?
All HZS33-1TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS33-1TD-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 HZS33-1TD-E part is unused and in its original packaging.
Return procedure for HZS33-1TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZS33-1TD-E Tags
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MM5Z5V1ST1G
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