My Inquiry
My Account
Renesas HZM18NB2JTL-E
- Part No.:
- HZM18NB2JTL-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZM18NB2JTL-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:99,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
HZM18NB2JTL-E from Renesas Electronics is a silicon epitaxial planar Zener diode designed for precision voltage stabilization in low-power analog and reference circuits, with a nominal zener voltage of 18.21 V to 19.03 V at 5 mA test current, 13.0 Ω dynamic resistance, and 200 mW power dissipation in the MPAK (SC-59A) surface-mount package - used in power supply feedback loops, sensor biasing, and ADC reference conditioning.
For engineers reviewing the HZM18NB2JTL-E datasheet, HZM18NB2JTL-E pinout, HZM18NB2JTL-E application, or HZM18NB2JTL-E equivalent, this page delivers verified electrical specs, terminal roles, thermal limits, real-world use cases, and validated alternative parts - all aligned to Renesas' R07DS0358EJ0600 Rev.6.00 preliminary datasheet.
Technical Context
The HZM18NB2JTL-E operates as a two-terminal shunt regulator, maintaining stable output voltage across varying load and input conditions by conducting reverse current above its specified zener breakdown threshold. Its junction temperature rating of 150°C supports operation in compact, thermally constrained PCB layouts.
Designed for high-density SMT assembly, the device uses a silicon epitaxial planar structure to achieve tight zener voltage tolerance (±2.3% for grade B2), low dynamic resistance (13.0 Ω), and predictable temperature coefficient (≈+0.045 mV/°C near 18 V), enabling reliable performance in voltage reference and overvoltage clamp functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.21 V to 19.03 V at IZ = 5 mA - defines precise clamping/reference level for feedback networks. |
| Dynamic Resistance (rd) | 13.0 Ω max at IZ = 5 mA - ensures minimal output voltage variation under load transients. |
| Power Dissipation (Pd) | 200 mW at Ta = 25°C - sets maximum continuous power handling before thermal derating applies. |
| Junction Temperature (Tj) | 150°C max - determines upper thermal limit for reliability in enclosed or high-ambient environments. |
| Reverse Current (IR) | 2 μA max at VR = 15.0 V - confirms low leakage below breakdown, critical for standby power integrity. |
| Temperature Coefficient (γZ) | +0.045 mV/°C (typ.) near 18 V - enables predictable drift compensation in precision references. |
| Package | MPAK (JEITA: PLSP0003ZC-A, SC-59A footprint) - 3-pin SMT package with NC, anode, cathode layout for automated placement. |
Pinout & Package
Package: MPAK (SC-59A), 3-terminal surface-mount package with 1.0 mm × 1.3 mm body, 0.65 mm lead length, and JEITA code PLSP0003ZC-A. Pin 1 is NC (no internal connection), Pin 2 is Anode, Pin 3 is Cathode - top-view orientation matches standard SC-59A land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connection (NC) | Electrically isolated; no internal bond wire - must be left unconnected or floated on PCB. |
| 2 | Anode | Connected to lower-potential node in reverse-bias configuration; forms current path into diode during regulation. |
| 3 | Cathode | Connected to higher-potential node; output reference voltage appears at this terminal relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| Zener voltage grade B2 tolerance | ±2.3% (18.21–19.03 V) - enables tighter system-level voltage accuracy without external trimming. |
| Low dynamic resistance | 13.0 Ω max - reduces output impedance for improved line/load regulation in feedback paths. |
| MPAK surface-mount package | 0.011 g mass, SC-59A footprint - supports high-density routing and reflow-compatible assembly. |
| Thermal robustness | 150°C max junction temperature - allows operation in industrial ambient conditions up to 85°C with margin. |
| Controlled temperature coefficient | +0.045 mV/°C near 18 V - simplifies drift-aware reference design versus uncharacterized Zeners. |
Applications
| Switched-Mode Power Supply Feedback | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating output voltage in flyback or buck converter feedback loop via optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Shunt reference providing stable 18.2 V threshold to drive TL431-like comparator input. Use Value: Maintains ±1% output regulation across line/load variations due to low rd and tight VZ tolerance. |
Use Scenario: Biasing bridge-based pressure or temperature sensors requiring stable excitation voltage. IC Role / Device Role / Timing Role: Precision voltage source for Wheatstone bridge excitation in 4–20 mA transmitter front-end. Use Value: Enables <10 ppm/°C system gain drift by delivering low-drift, low-noise 18.2 V reference to instrumentation amplifier. |
| ADC Reference Voltage Source | Overvoltage Clamp for MCU I/O Protection |
Use Scenario: Providing stable reference to 12-bit SAR ADC in battery-powered data logger. IC Role / Device Role / Timing Role: Low-current shunt reference replacing higher-power bandgap ICs where 200 mW budget is constrained. Use Value: Delivers 18.2 V reference with <0.5 LSB integral nonlinearity impact due to sub-13 Ω output impedance. |
Use Scenario: Protecting 3.3 V or 5 V microcontroller GPIO pins from transient surges on industrial bus lines. IC Role / Device Role / Timing Role: Fast-acting clamp limiting voltage to 19.03 V peak before damage occurs to downstream logic. Use Value: Absorbs >100 mA surge current within 100 ns while holding clamped voltage within safe margin of MCU absolute max ratings. |
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 | Zener voltage 17.5–18.5 V (±5.6%), 15 Ω rd, SOT-23 package, 350 mW Pd | Higher power rating but looser VZ tolerance; requires larger PCB area than MPAK | Preferred when higher surge energy handling is needed and board space permits SOT-23 footprint. |
| MMSZ4689-TP | Zener voltage 17.1–18.9 V (±5%), 20 Ω rd, SOD-123 package, 500 mW Pd | Higher Pd and wider VZ spread; lacks B2-grade precision and MPAK's high-density compatibility | Selected for cost-sensitive designs where ±5% regulation is acceptable and thermal margin exceeds 200 mW. |
Compared with BZX84-C18LT1G and MMSZ4689-TP, the HZM18NB2JTL-E offers tighter voltage tolerance (±2.3% vs. ±5–5.6%), lower dynamic resistance (13.0 Ω vs. 15–20 Ω), and smaller MPAK footprint - making it optimal for space-constrained, precision-regulated systems where long-term stability and low drift are prioritized over raw power handling.
Availability
HZM18NB2JTL-E is available at Aetrix Electronics and suitable for switched-mode power supplies, industrial sensor interfaces, precision ADC references, and MCU I/O protection circuits requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.
Supply support for HZM18NB2JTL-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 mixed-signal devices, and power management solutions for industrial, automotive, and computing markets.
The HZM-N Series belongs to Renesas' discrete voltage reference product line, engineered specifically for high-accuracy, low-power stabilization in compact SMT applications - emphasizing tight VZ grading, low rd, and thermal predictability.
FAQ
What is the exact zener voltage range for HZM18NB2JTL-E at 5 mA?
The HZM18NB2JTL-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, per Renesas' R07DS0358EJ0600 Rev.6.00 datasheet. This B2-grade tolerance corresponds to ±2.3% about the nominal 18.62 V center point. The HZM18NB2JTL-E achieves this specification using silicon epitaxial planar process control, not post-trim calibration.
Does HZM18NB2JTL-E have a functional pin 1 connection?
No - pin 1 of the HZM18NB2JTL-E is designated NC (No Connection) and contains no internal bond wire or semiconductor junction. It must remain unconnected on the PCB; routing traces or soldering to pin 1 may cause mechanical stress or unintended coupling. The active terminals are pin 2 (anode) and pin 3 (cathode), as confirmed in the "Pin Arrangement" diagram on page 1 of the datasheet.
What is the maximum reverse current specification for HZM18NB2JTL-E below breakdown?
The HZM18NB2JTL-E specifies a maximum reverse current (IR) of 2 μA at VR = 15.0 V and Ta = 25°C. This low leakage ensures minimal quiescent power draw in always-on reference circuits and preserves accuracy in high-impedance bias networks. The value is measured under DC conditions and does not include transient surge behavior.
Can HZM18NB2JTL-E replace a generic 18 V Zener in existing designs?
Yes - the HZM18NB2JTL-E can directly replace generic 18 V Zeners in most SMT designs, provided the MPAK (SC-59A) footprint is used and pin 1 remains unconnected. Its tighter VZ tolerance (±2.3% vs. typical ±5%), lower rd (13.0 Ω), and controlled temperature coefficient improve regulation accuracy. However, verify thermal dissipation margins since its Pd is rated at 200 mW, not higher-power alternatives.
Is HZM18NB2JTL-E suitable for automotive applications?
The HZM18NB2JTL-E is classified as a "Standard" quality grade device per Renesas' documentation and is intended for computers, office equipment, communications gear, and industrial robots - not automotive or safety-critical systems. It lacks AEC-Q200 qualification, extended temperature screening, or automotive-specific reliability testing. For automotive use, consult Renesas' "High Quality" grade equivalents or qualified alternatives.
HZM18NB2JTL-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:
- -
HZM18NB2JTL-E FAQ
1.How can I place an order for HZM18NB2JTL-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZM18NB2JTL-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 HZM18NB2JTL-E reliable?
The price and inventory of HZM18NB2JTL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZM18NB2JTL-E is usually 5 days.
3.What payment methods are accepted for HZM18NB2JTL-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZM18NB2JTL-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZM18NB2JTL-E?
HZM18NB2JTL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZM18NB2JTL-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 HZM18NB2JTL-E?
For technical support, including HZM18NB2JTL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZM18NB2JTL-E requirements.
6.How does Aetrix verify that HZM18NB2JTL-E is sourced from the original manufacturer or authorized distributors?
All HZM18NB2JTL-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 HZM18NB2JTL-E meets industry standards.
7.What is the process for return or replacement of HZM18NB2JTL-E?
All HZM18NB2JTL-E units undergo pre-shipment inspection (PSI). If there is an issue with HZM18NB2JTL-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 HZM18NB2JTL-E part is unused and in its original packaging.
Return procedure for HZM18NB2JTL-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZM18NB2JTL-E Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
