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Renesas HZM6.8Z4MWATL-E
- Part No.:
- HZM6.8Z4MWATL-E
- Manufacturer:
- Renesas
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
HZM6.8Z4MWATL-E.pdf
- Description:
- TVS DIODE 3.5VWM 3MPAK
- Quantity:
- Payment:
- Shipping:
Inventory:24,000
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Product details
Overview
HZM6.8Z4MWATL-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 6.8 V (±3.5% tolerance, Grade B3), with dynamic resistance of 30 Ω at 5 mA test current, maximum power dissipation of 200 mW, and operates within –55°C to +150°C storage temperature range. It is commonly used in voltage reference generation for sensor signal conditioning and power supply feedback loops.
For engineers reviewing the HZM6.8Z4MWATL-E datasheet, HZM6.8Z4MWATL-E pinout, HZM6.8Z4MWATL-E application, or HZM6.8Z4MWATL-E equivalent, key selection criteria include zener voltage tolerance, dynamic impedance at operating current, thermal derating behavior, and MPAK package compatibility with high-density SMT assembly processes.
Technical Context
The HZM6.8Z4MWATL-E employs a silicon epitaxial planar junction structure optimized for stable reverse breakdown characteristics. Its zener voltage exhibits a positive temperature coefficient of approximately +0.03 mV/°C near 6.8 V, enabling predictable drift compensation in reference designs.
It operates exclusively in reverse-biased mode with no forward conduction role; terminal 1 is NC (no internal connection), terminals 2 and 3 serve as anode and cathode respectively. The device is rated for 2 μA maximum reverse leakage at VR = 5 V and requires ≥2 mA minimum zener current to maintain regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.86 V to 7.14 V at IZ = 5 mA - defines regulation setpoint with ±3.5% initial tolerance (Grade B3) |
| Dynamic Resistance (rd) | 30 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 before thermal derating applies |
| Reverse Current (IR) | 2 μA max at VR = 5 V - indicates leakage level below breakdown, critical for low-current bias networks |
| Junction Temperature (Tj) | 150°C maximum - constrains PCB copper area and ambient thermal design for reliability |
| Package | MPAK (JEITA PLSP0003ZC-A) - 3-pin surface-mount package with 0.65 mm lead pitch and 1.0 mm profile |
Pinout & Package
Package: MPAK (PLSP0003ZC-A), 3-terminal surface-mount package with 1.0 mm height, 2.7–3.1 mm length, and 1.35–1.65 mm width. Terminal 1 is NC (no internal connection); terminals 2 and 3 are electrically active.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connection (NC) | Internally unconnected; must be left floating or grounded per layout-no electrical function |
| 2 | Anode | Connected to lower-potential node in reverse-bias configuration; current enters here during regulation |
| 3 | Cathode | Connected to higher-potential node; zener voltage appears across cathode-to-anode terminals |
Key Features
| Feature | Design Value |
|---|---|
| Grade-B3 zener voltage tolerance | ±3.5% at 5 mA - enables tighter reference accuracy than standard-grade Zeners without trimming |
| Low dynamic resistance | 30 Ω max - improves line and load regulation in feedback paths and analog references |
| MPAK surface-mount package | 0.65 mm pin pitch, 1.0 mm height - supports automated placement and high board density in space-constrained designs |
| Thermal stability | +0.03 mV/°C tempco near 6.8 V - allows predictable drift modeling for compensated reference circuits |
Applications
| Industrial Sensor Reference | Low-Power Voltage Monitor |
|---|---|
Use Scenario: Provides stable 6.8 V reference for bridge-based pressure sensors in factory automation transmitters. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference in op-amp-based instrumentation amplifier bias network. Use Value: Enables <1% total error over –25°C to +85°C due to tight VZ tolerance and low rd, reducing calibration burden. |
Use Scenario: Detects brown-out conditions in battery-powered IoT nodes using comparator threshold setting. IC Role / Device Role / Timing Role: Shunt reference establishing precise 6.8 V trip point for undervoltage lockout circuitry. Use Value: Guarantees detection accuracy within ±0.24 V over temperature, minimizing false triggers during voltage transients. |
| ADC Reference Buffer | SMPS Feedback Divider |
Use Scenario: Supplies clean reference voltage to 12-bit SAR ADC in medical diagnostic equipment. IC Role / Device Role / Timing Role: Low-noise shunt reference stabilizing ADC VREF input against supply ripple. Use Value: 30 Ω rd limits reference droop under 100 μA load steps, preserving ENOB in high-resolution conversion. |
Use Scenario: Sets output voltage in isolated flyback converter via optocoupler feedback network. IC Role / Device Role / Timing Role: Precision zener defining upper divider node in TL431-compatible feedback string. Use Value: Grade B3 tolerance ensures ±1.5% output voltage accuracy without post-production trimming. |
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-C6V8LT1G | Same 6.8 V nominal, SOT-23 package, ±5% tolerance (looser than HZM6.8Z4MWATL-E's ±3.5%), rd = 40 Ω | Higher leakage (5 μA @ 5 V) and larger footprint; suitable where cost > precision | Select when board space permits SOT-23 and ±5% regulation tolerance is acceptable |
| MMSZ4689T1G | 6.8 V nominal, SOD-123 package, ±5% tolerance, rd = 35 Ω, Pd = 500 mW | Higher power rating but looser tolerance and no NC pin - less suitable for ultra-compact, high-accuracy layouts | Prefer when higher surge energy handling is needed and MPAK's NC pin is not required |
Compared with BZX84-C6V8LT1G and MMSZ4689T1G, the HZM6.8Z4MWATL-E offers tighter voltage tolerance, lower dynamic resistance, and a dedicated NC pin for improved layout flexibility in dense analog sections-making it optimal for precision reference and feedback applications where regulation accuracy and board real estate are critical.
Availability
HZM6.8Z4MWATL-E is available at Aetrix Electronics and suitable for industrial sensor reference, low-power voltage monitor, ADC reference buffer, and SMPS feedback divider applications requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.
Supply support for HZM6.8Z4MWATL-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The HZM-N Series is part of Renesas' discrete Zener diode portfolio, engineered for stable voltage regulation in compact, high-reliability analog subsystems-particularly where tight tolerance, low dynamic impedance, and MPAK mountability are essential.
FAQ
What is the zener voltage tolerance of HZM6.8Z4MWATL-E?
The HZM6.8Z4MWATL-E has a zener voltage range of 6.86 V to 7.14 V at 5 mA test current, corresponding to ±3.5% tolerance (Grade B3). This tighter tolerance is confirmed in the Electrical Characteristics table on page 2 of the R07DS0358EJ0600 datasheet and distinguishes it from standard-grade Zeners with ±5% or wider spreads.
Does HZM6.8Z4MWATL-E have a functional pin 1?
No-pin 1 of the HZM6.8Z4MWATL-E is designated NC (No Connection) and is internally unconnected. As shown in the Pin Arrangement diagram on page 1 of the datasheet, only pins 2 (anode) and 3 (cathode) are electrically active. Pin 1 must remain unconnected or grounded per layout guidelines, but contributes no circuit function.
What is the maximum reverse leakage current for HZM6.8Z4MWATL-E?
The maximum reverse leakage current (IR) for HZM6.8Z4MWATL-E is 2 μA at VR = 5 V, per the Electrical Characteristics table on page 2 of the R07DS0358EJ0600 datasheet. This low leakage supports accurate biasing in high-impedance reference networks and minimizes error in low-current monitoring circuits.
Can HZM6.8Z4MWATL-E be used in place of a standard 6.8 V Zener like 1N4735A?
No-HZM6.8Z4MWATL-E is not a drop-in replacement for through-hole Zeners like 1N4735A. It uses the MPAK surface-mount package (PLSP0003ZC-A) with different pinout (including NC), lower power rating (200 mW vs. 1 W), and tighter tolerance. Substitution requires PCB redesign, thermal reassessment, and verification of current compliance in the target circuit.
What is the temperature coefficient of HZM6.8Z4MWATL-E?
The temperature coefficient (γZ) of HZM6.8Z4MWATL-E is approximately +0.03 mV/°C near its 6.8 V operating point, as indicated by the curve in Figure 2 on page 5 of the R07DS0358EJ0600 datasheet. This positive, low-drift characteristic supports stable reference performance across industrial temperature ranges without external compensation.
HZM6.8Z4MWATL-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3.5V
- Voltage - Breakdown (Min):
- 6.47V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 4pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 3-MPAK
HZM6.8Z4MWATL-E FAQ
1.How can I place an order for HZM6.8Z4MWATL-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZM6.8Z4MWATL-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 HZM6.8Z4MWATL-E reliable?
The price and inventory of HZM6.8Z4MWATL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZM6.8Z4MWATL-E is usually 5 days.
3.What payment methods are accepted for HZM6.8Z4MWATL-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZM6.8Z4MWATL-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZM6.8Z4MWATL-E?
HZM6.8Z4MWATL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZM6.8Z4MWATL-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 HZM6.8Z4MWATL-E?
For technical support, including HZM6.8Z4MWATL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZM6.8Z4MWATL-E requirements.
6.How does Aetrix verify that HZM6.8Z4MWATL-E is sourced from the original manufacturer or authorized distributors?
All HZM6.8Z4MWATL-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 HZM6.8Z4MWATL-E meets industry standards.
7.What is the process for return or replacement of HZM6.8Z4MWATL-E?
All HZM6.8Z4MWATL-E units undergo pre-shipment inspection (PSI). If there is an issue with HZM6.8Z4MWATL-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 HZM6.8Z4MWATL-E part is unused and in its original packaging.
Return procedure for HZM6.8Z4MWATL-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZM6.8Z4MWATL-E Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
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