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Renesas HZM18NB3TL-E
- Part No.:
- HZM18NB3TL-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZM18NB3TL-E.pdf
- Description:
- DIODE ZENER
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Inventory:36,000
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Product details
Overview
HZM18NB3TL-E from Renesas Electronics is a silicon epitaxial planar Zener diode designed for precision voltage stabilization in low-power analog and reference circuits. It delivers a nominal zener voltage of 18.21–19.03 V at 5 mA, with dynamic resistance of 45 Ω, power dissipation up to 200 mW, and operates within a junction temperature range of –55°C to +150°C - ideal for industrial sensor biasing and voltage reference applications.
For engineers reviewing the HZM18NB3TL-E datasheet, HZM18NB3TL-E pinout, HZM18NB3TL-E application, or HZM18NB3TL-E equivalent, key selection criteria include its B3-grade voltage tolerance (±0.82 V), MPAK surface-mount package compatibility, low temperature coefficient (≈+0.07 mV/°C near 18 V), and suitability for space-constrained DC bias networks requiring stable regulation under varying thermal conditions.
Technical Context
The HZM18NB3TL-E employs a silicon epitaxial planar structure optimized for tight zener voltage control and low dynamic impedance. Its electrical behavior is characterized under pulsed test conditions (Pw = 40 ms) to minimize self-heating effects during measurement.
This device functions exclusively as a two-terminal shunt regulator: cathode connects to higher potential, anode to lower potential, with no internal series resistance or temperature compensation circuitry. Its performance is defined by reverse-bias operation only - forward conduction is not specified beyond standard diode turn-on.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.21–19.03 V at IZ = 5 mA - defines stable regulation point for reference design |
| Dynamic Resistance (rd) | 45 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Power Dissipation (Pd) | 200 mW at Ta = 25°C - sets maximum continuous DC power handling before thermal derating |
| Junction Temperature (Tj) | –55°C to +150°C - enables operation in extended industrial environments without external heatsinking |
| Reverse Current (IR) | 2 μA max at VR = 13.0 V - ensures minimal leakage in high-impedance bias networks |
| Temperature Coefficient (γZ) | +0.07 mV/°C (typ.) near 18 V - quantifies drift per degree Celsius in precision references |
Pinout & Package
Package: MPAK (JEITA code PLSP0003ZC-A), surface-mount, 3-pin, 1.0 mm × 1.3 mm footprint, 0.011 g mass. Designed for high-density PCB layouts and automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect (NC) | Electrically isolated terminal - must remain unconnected; no internal bond or function |
| 2 | Anode | Reference node for reverse-bias connection; ties to lower-potential rail in shunt regulator configuration |
| 3 | Cathode | Input node for regulated voltage; connects to supply rail and current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| B3-grade voltage tolerance | ±0.82 V total spread (18.21–19.03 V) - supports tighter reference designs vs. B/B1/B2 grades |
| MPAK package | 0.011 g mass, 1.0 × 1.3 mm footprint - enables miniaturized PCBs and high-speed SMT assembly |
| Pulsed test validation | Specified under 40 ms pulse width - ensures parameter accuracy independent of steady-state thermal rise |
| Low leakage at rated VR | 2 μA max at 13.0 V - preserves accuracy in high-impedance feedback or sensing paths |
Applications
| Industrial Sensor Biasing | ADC Reference Stabilization |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs) in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt voltage reference supplying fixed bias current through sensor network. Use Value: Maintains <±0.5% full-scale error over –40°C to +85°C ambient due to low γZ and tight VZ tolerance. |
Use Scenario: Generating precise 18 V reference for 16-bit SAR ADC front-end in data acquisition systems. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference replacing bulkier IC-based solutions. Use Value: Enables ±0.01% linearity retention by limiting reference drift to <0.15 mV across 50°C operating range. |
| Power Supply Overvoltage Clamp | Microcontroller Reset Circuit |
Use Scenario: Clamping transient surges on 24 V industrial bus lines using series resistor and HZM18NB3TL-E. IC Role / Device Role / Timing Role: Passive crowbar element absorbing energy above 19.03 V threshold. Use Value: Limits peak voltage to ≤19.5 V during 100 ns transients, protecting downstream LDOs and logic. |
Use Scenario: Generating clean reset signal for ARM Cortex-M microcontrollers powered from 20 V rails. IC Role / Device Role / Timing Role: Zener-based brown-out detector feeding RC delay into MCU reset pin. Use Value: Triggers reset at 18.2 V with <10 μs response time, ensuring deterministic boot under undervoltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage stabilization applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C18LT1G | 18 V nominal, ±5% tolerance (17.1–18.9 V), SOT-23 package, 350 mW Pd | Wider VZ tolerance, higher power rating, smaller thermal mass | Preferred where board space allows SOT-23 and looser regulation is acceptable |
| MMSZ5246B-TP | 18 V nominal, ±5% tolerance (17.1–18.9 V), SOD-123 package, 500 mW Pd | Higher power capability but larger footprint and ±5% grade vs. HZM18NB3TL-E's ±0.82 V spread | Chosen when >200 mW dissipation or legacy SOD-123 layout compatibility is required |
Compared with BZX84-C18LT1G and MMSZ5246B-TP, the HZM18NB3TL-E offers superior voltage precision (±0.82 V vs. ±5%) and compact MPAK packaging, making it optimal for high-accuracy, space-constrained industrial references - though its 200 mW limit requires careful current limiting in clamp roles.
Availability
HZM18NB3TL-E is available at Aetrix Electronics and suitable for industrial sensor biasing, ADC reference stabilization, power supply overvoltage clamping, and microcontroller reset circuit design requiring stable component supply and consistent B3-grade voltage matching.
Supply support for HZM18NB3TL-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 is a global semiconductor manufacturer headquartered in Japan, specializing in microcontrollers, analog power devices, and precision discrete components for industrial and automotive markets.
The HZM-N Series is part of Renesas' silicon Zener diode portfolio engineered specifically for high-stability voltage reference and shunt regulation in industrial automation, test equipment, and sensor interface applications.
FAQ
What is the exact zener voltage range for HZM18NB3TL-E?
The HZM18NB3TL-E has a guaranteed zener voltage range of 18.21 V to 19.03 V when tested at IZ = 5 mA and Ta = 25°C. This B3-grade specification reflects a tighter tolerance than B1/B2 variants and is validated using pulsed measurement (Pw = 40 ms) to avoid thermal self-heating artifacts. The HZM18NB3TL-E datasheet confirms this range on page 3 of R07DS0358EJ0600 Rev.6.00.
Is Pin 1 of HZM18NB3TL-E electrically connected?
No - Pin 1 of the HZM18NB3TL-E is designated "NC" (No Connect) and is electrically isolated with no internal bond wire or semiconductor connection. The device operates as a two-terminal device using only Pins 2 (Anode) and 3 (Cathode). This NC pin serves mechanical alignment and package integrity purposes only and must remain unconnected in PCB layout. Confirmed in the "Pin Arrangement" diagram on page 1 of the HZM-N Series datasheet.
What is the maximum reverse current specification for HZM18NB3TL-E?
The HZM18NB3TL-E specifies a maximum reverse current (IR) of 2 μA at VR = 13.0 V and Ta = 25°C. This low leakage value ensures minimal error contribution in high-impedance reference divider networks and supports accurate biasing in precision analog stages. The parameter is explicitly listed in the Electrical Characteristics table on page 3 of R07DS0358EJ0600 Rev.6.00 for the HZM18N type with B3 grade.
Can HZM18NB3TL-E be used in place of a standard 18 V Zener diode like 1N4744A?
The HZM18NB3TL-E is not a direct replacement for 1N4744A due to fundamental differences: it uses an MPAK package (vs. DO-41), has B3-grade voltage tolerance (±0.82 V vs. ±5% for 1N4744A), and is rated for only 200 mW (vs. 1 W). While both regulate near 18 V, the HZM18NB3TL-E requires PCB redesign for MPAK footprint and current-limiting resistor recalculation. Its use case targets precision, not power handling.
What is the temperature coefficient behavior of HZM18NB3TL-E?
The HZM18NB3TL-E exhibits a positive temperature coefficient of approximately +0.07 mV/°C near its 18 V operating point, as shown in Figure 2 ("Temperature Coefficient vs. Zener Voltage") on page 5 of the datasheet. This means its zener voltage increases by ~0.07 mV per °C rise in junction temperature - a critical factor when designing temperature-stable references across –40°C to +85°C industrial ranges. The coefficient is measured and plotted across the full HZM-N series, including HZM18NB3TL-E.
HZM18NB3TL-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:
- -
HZM18NB3TL-E FAQ
1.How can I place an order for HZM18NB3TL-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZM18NB3TL-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 HZM18NB3TL-E reliable?
The price and inventory of HZM18NB3TL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZM18NB3TL-E is usually 5 days.
3.What payment methods are accepted for HZM18NB3TL-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZM18NB3TL-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZM18NB3TL-E?
HZM18NB3TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZM18NB3TL-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 HZM18NB3TL-E?
For technical support, including HZM18NB3TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZM18NB3TL-E requirements.
6.How does Aetrix verify that HZM18NB3TL-E is sourced from the original manufacturer or authorized distributors?
All HZM18NB3TL-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 HZM18NB3TL-E meets industry standards.
7.What is the process for return or replacement of HZM18NB3TL-E?
All HZM18NB3TL-E units undergo pre-shipment inspection (PSI). If there is an issue with HZM18NB3TL-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 HZM18NB3TL-E part is unused and in its original packaging.
Return procedure for HZM18NB3TL-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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