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Renesas HZS24-3TD-E
- Part No.:
- HZS24-3TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS24-3TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
HZS24-3TD-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in stabilized power supplies, with a nominal zener voltage of 24.3–25.5 V at 2 mA test current, 70 Ω dynamic resistance, 400 mW power dissipation, and operation up to 200°C junction temperature - used in industrial control power rails and analog reference circuits.
For engineers reviewing the HZS24-3TD-E datasheet, HZS24-3TD-E pinout, HZS24-3TD-E application, or HZS24-3TD-E equivalent, this page delivers verified electrical specs, package mapping to MHD (JEITA GRZZ0002ZC-A), thermal derating behavior, zener temperature coefficient, and direct alternatives for low-leakage, medium-power voltage reference design.
Technical Context
The HZS24-3TD-E operates as a two-terminal shunt regulator, maintaining stable output voltage across varying load currents via controlled reverse-biased breakdown. Its planar diffusion structure ensures low leakage (<1 µA at VR = 18.8 V) and tight voltage tolerance (±0.6 V at 24 V nominal).
It exhibits a negative zener voltage temperature coefficient of −0.04 %/°C (−19 mV/°C) near 24 V, enabling predictable drift compensation in temperature-sensitive references. Thermal performance follows standard derating: full 400 mW at Ta ≤ 50°C, linearly reduced to zero at Ta = 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24.3–25.5 V at IZ = 2 mA - defines regulated output range for mid-range supply rail stabilization |
| Dynamic Resistance (rd) | 70 Ω max at IZ = 2 mA - determines output impedance and load regulation sensitivity |
| Power Dissipation (Pd) | 400 mW at Ta ≤ 50°C - sets maximum continuous power handling before thermal derating begins |
| Reverse Leakage (IR) | ≤1 µA at VR = 18.8 V - ensures minimal quiescent current in high-impedance bias networks |
| Junction Temperature (Tj) | 200°C max - supports operation in high-ambient industrial environments with adequate PCB copper heatsinking |
| Temperature Coefficient (γZ) | −19 mV/°C (−0.04 %/°C) - enables predictable voltage drift modeling over −55°C to +125°C operating range |
Pinout & Package
Package: MHD (JEITA GRZZ0002ZC-A), axial leaded, 2.0 mm diameter × 26.0 mm length, paper-phenol body, cathode band marked in lake blue. Mass: 0.084 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-biased terminal | Connected to higher potential node; carries regulated current into load or ground-referenced circuit |
| 2 (Anode) | Reference/ground terminal | Typically tied to system ground or common return; establishes reference point for zener voltage drop |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 70 Ω max ensures <±10 mV output shift under ±1 mA load transients in feedback-sense applications |
| High-temperature operation | 200°C Tj rating allows use in enclosed industrial enclosures without forced cooling |
| Stable voltage grade | "3" suffix denotes ±0.6 V tolerance band - tighter than generic 5% Zeners for precision biasing |
| Automated insertion compatibility | 5 mm pitch and MHD mechanical dimensions support high-speed pick-and-place and wave soldering |
Applications
| Industrial Power Supply Reference | Analog Sensor Excitation |
|---|---|
Use Scenario: Providing stable 24 V reference for op-amp-based current sources in PLC analog output modules. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise excitation voltage for 4–20 mA transmitter circuits. Use Value: Enables ±0.1% full-scale accuracy over temperature due to low rd and known γZ. |
Use Scenario: Biasing bridge sensors (e.g., strain gauges) in factory-floor weighing systems. IC Role / Device Role / Timing Role: Fixed-voltage excitation source replacing higher-cost IC references where 1% stability suffices. Use Value: Eliminates need for trimming potentiometers; maintains linearity within sensor datasheet limits. |
| DC-DC Converter Feedback | Overvoltage Protection Clamp |
Use Scenario: Setting output voltage of isolated flyback converters in DIN-rail power supplies. IC Role / Device Role / Timing Role: Primary-side voltage sense element feeding optocoupler feedback loop. Use Value: Delivers fast transient response and stable regulation without external error amplifier. |
Use Scenario: Clamping transient surges on 24 V control bus in motor drive cabinets. IC Role / Device Role / Timing Role: Passive overvoltage limiter absorbing short-duration spikes above 26 V. Use Value: Limits peak voltage to safe level for downstream logic without crowbar action or reset delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | 24 V nominal, ±5% tolerance (1.2 V band), 500 mW Pd, 150 Ω rd | Looser voltage tolerance and higher impedance reduce accuracy in precision biasing | Preferred where cost dominates and ±5% regulation is acceptable |
| BZX84-C24 | 24 V nominal, ±5% tolerance, SOT-23 package, 300 mW Pd, 80 Ω rd | Surface-mount format enables compact layout but lacks axial thermal mass for sustained dissipation | Selected for space-constrained PCBs where thermal cycling is mild and peak power <200 mW |
Compared with HZS24-3TD-E, the 1N4749A offers higher power but poorer regulation stability, while BZX84-C24 trades thermal robustness for miniaturization - making HZS24-3TD-E optimal for industrial-grade through-hole designs requiring long-term voltage fidelity and thermal resilience.
Availability
HZS24-3TD-E is available at Aetrix Electronics and suitable for industrial control systems, analog sensor interfaces, and DIN-rail power supplies requiring stable component supply with traceable sourcing and lifecycle continuity.
Supply support for HZS24-3TD-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 for industrial, automotive, and infrastructure markets.
HZS24-3TD-E belongs to the HZS Series silicon planar Zener diodes - engineered for high-reliability stabilized power supply applications demanding low leakage, tight voltage tolerance, and extended temperature operation.
FAQ
What is the zener voltage range for HZS24-3TD-E?
The HZS24-3TD-E has a guaranteed zener voltage range of 24.3 V to 25.5 V when tested at IZ = 2 mA and Ta = 25°C. This ±0.6 V tolerance (Grade "3") is tighter than standard 5% Zeners and supports precision voltage referencing in industrial analog circuits where HZS24-3TD-E serves as the primary regulation element.
Does HZS24-3TD-E support high-temperature operation?
Yes, HZS24-3TD-E is rated for junction temperatures up to 200°C and storage temperatures from −55°C to +175°C. Its MHD package provides sufficient thermal mass for sustained 400 mW dissipation below 50°C ambient, with linear derating to zero at 150°C - making HZS24-3TD-E suitable for enclosed industrial enclosures without active cooling.
What is the dynamic resistance of HZS24-3TD-E and why does it matter?
HZS24-3TD-E has a maximum dynamic resistance of 70 Ω at IZ = 2 mA. This low rd minimizes output voltage variation under changing load current - critical for maintaining accuracy in feedback loops and sensor excitation circuits where HZS24-3TD-E acts as a stable reference node.
How is the cathode identified on HZS24-3TD-E?
The cathode of HZS24-3TD-E is marked by a lake-blue band on the MHD package body. Pin 1 (cathode) must be connected to the higher-potential node in shunt regulator configurations, while Pin 2 (anode) connects to ground or reference return - consistent across all HZS Series diodes including HZS24-3TD-E.
Is HZS24-3TD-E RoHS compliant?
Yes, HZS24-3TD-E complies with the EU RoHS Directive and contains no restricted substances above threshold limits. Renesas confirms environmental compliance per applicable regulations, and HZS24-3TD-E is suitable for use in commercial and industrial equipment where RoHS conformance is required.
HZS24-3TD-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:
- -
HZS24-3TD-E FAQ
1.How can I place an order for HZS24-3TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS24-3TD-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 HZS24-3TD-E reliable?
The price and inventory of HZS24-3TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS24-3TD-E is usually 5 days.
3.What payment methods are accepted for HZS24-3TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS24-3TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS24-3TD-E?
HZS24-3TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS24-3TD-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 HZS24-3TD-E?
For technical support, including HZS24-3TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS24-3TD-E requirements.
6.How does Aetrix verify that HZS24-3TD-E is sourced from the original manufacturer or authorized distributors?
All HZS24-3TD-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 HZS24-3TD-E meets industry standards.
7.What is the process for return or replacement of HZS24-3TD-E?
All HZS24-3TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS24-3TD-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 HZS24-3TD-E part is unused and in its original packaging.
Return procedure for HZS24-3TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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