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Renesas HZM6.8MWATR-E
- Part No.:
- HZM6.8MWATR-E
- Manufacturer:
- Renesas
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
HZM6.8MWATR-E.pdf
- Description:
- TRANS VOLTAGE SUPPRESSOR DIODE
- Quantity:
- Payment:
- Shipping:
Inventory:21,500
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Product details
Overview
HZM6.8MWATR-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 6.86 V to 7.14 V at 5 mA test current, with dynamic resistance of 30 Ω max, 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 HZM6.8MWATR-E datasheet, HZM6.8MWATR-E pinout, HZM6.8MWATR-E application, or HZM6.8MWATR-E equivalent, key selection criteria include zener voltage tolerance (±2.5% for Grade B3), low dynamic impedance, MPAK surface-mount package compatibility, and thermal stability across industrial ambient conditions.
Technical Context
The HZM6.8MWATR-E employs a silicon epitaxial planar junction structure optimized for stable reverse-breakdown behavior under DC and pulsed conditions (Pw = 40 ms). Its zener voltage exhibits a positive temperature coefficient of approximately +0.03 mV/°C near 6.8 V, minimizing drift in mid-range stabilization applications.
It is rated for 2 mA minimum reverse current to maintain regulation and supports up to 5 mA zener test current without exceeding absolute maximum ratings. The device is not intended for surge suppression or high-current shunt regulation - its design targets precision biasing and reference functions where low noise and repeatable knee characteristics are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.86 V to 7.14 V at IZ = 5 mA - defines tight regulation window for stable 6.8 V reference generation |
| Dynamic Resistance (rd) | ≤30 Ω at IZ = 5 mA - ensures minimal output impedance and high line/load regulation sensitivity |
| Power Dissipation (Pd) | 200 mW at Ta = 25°C - limits continuous operation to ≤29.4 mA at 6.8 V without derating |
| Reverse Current (IR) | ≤2 μA at VR = 5 V - guarantees low leakage in high-impedance reference nodes |
| Junction Temperature (Tj) | 150°C maximum - enables reliable operation in thermally constrained PCB layouts |
| Package | MPAK (PLSP0003ZC-A) - 3-pin SMT package with 0.65 mm lead pitch, optimized for automated placement |
Pinout & Package
MPAK package: ultra-compact surface-mount outline with exposed pad thermal path; dimensions per JEITA code PLSP0003ZC-A (D-type variant); mass ≈ 0.011 g; compatible with reflow soldering profiles per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect (NC) | Internally unconnected - must remain floating; no routing or grounding permitted |
| 2 | Anode | Forward-biased terminal; connects to lower-potential node in reverse-bias regulation configuration |
| 3 | Cathode | Zener breakdown terminal; connects to higher-potential node and load/reference output point |
Key Features
| Feature | Design Value |
|---|---|
| Grade-B3 zener voltage tolerance | ±2.5% (6.86–7.14 V) - enables tighter system-level voltage reference accuracy without external trimming |
| Low dynamic impedance | 30 Ω max at 5 mA - reduces output voltage variation under load transients in feedback networks |
| MPAK surface-mount package | 0.8 × 1.0 mm footprint - supports high-density PCB layouts and high-speed pick-and-place assembly |
| Thermal stability | +0.03 mV/°C tempco near 6.8 V - minimizes drift over –25°C to +85°C operating range |
| Low leakage current | ≤2 μA at 5 V reverse bias - preserves accuracy in high-impedance voltage divider or op-amp reference inputs |
Applications
| Industrial Sensor Reference | Low-Power ADC Biasing |
|---|---|
|
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 two-terminal shunt voltage reference in ratiometric excitation circuitry. Use Value: Maintains <±0.5% reference stability over –40°C to +85°C ambient, enabling sub-0.1% total error in 16-bit measurement systems. |
Use Scenario: Supplies precise bias voltage to the reference input of a SAR ADC in battery-powered IoT node. IC Role / Device Role / Timing Role: Low-leakage shunt regulator establishing clean VREF independent of supply rail fluctuations. Use Value: Enables consistent 12-bit ENOB performance despite 3.0–3.6 V Li-ion supply variation due to <2 μA leakage and 30 Ω rd. |
| Op-Amp Precision Clamp | Microcontroller Reset Threshold |
|
Use Scenario: Limits op-amp output swing to ±6.8 V in active filter stages to prevent downstream saturation. IC Role / Device Role / Timing Role: Bidirectional clamping element (anode-to-rail, cathode-to-output) exploiting sharp zener knee. Use Value: Delivers fast, repeatable clipping with <5 ns response to overvoltage transients, preserving signal integrity in audio and instrumentation paths. |
Use Scenario: Sets brown-out detection threshold for Renesas RL78 microcontrollers in smart meter designs. IC Role / Device Role / Timing Role: Voltage-sensing element feeding comparator input to trigger controlled reset at 6.8 V ±2.5%. Use Value: Guarantees deterministic reset activation before internal LDO dropout, preventing firmware corruption during grid voltage sags. |
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-C6V8 | Same nominal VZ (6.8 V), but ±5% tolerance (Grade C), 400 mW Pd, SOT-23 package | Higher power handling but looser voltage spec; larger footprint than MPAK | Select when higher surge energy absorption is required and board space permits SOT-23 |
| MMSZ4688 | VZ = 6.8 V ±5%, 500 mW Pd, SOD-123 package, rd = 40 Ω | Higher dynamic resistance and wider tolerance; less stable under varying load currents | Choose for cost-sensitive consumer applications where ±5% reference accuracy is acceptable |
Compared with BZX84-C6V8 and MMSZ4688, the HZM6.8MWATR-E offers superior voltage precision (±2.5% vs. ±5%), lower dynamic impedance (30 Ω vs. ≥40 Ω), and a smaller MPAK footprint - making it optimal for space-constrained, high-accuracy industrial references where thermal and parametric stability are prioritized over raw power rating.
Availability
HZM6.8MWATR-E is available at Aetrix Electronics and suitable for industrial sensor reference, low-power ADC biasing, op-amp clamping, and microcontroller reset threshold applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for HZM6.8MWATR-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 leader delivering microcontrollers, analog, power, and timing solutions for automotive, industrial, and enterprise systems.
The HZM-N Series belongs to Renesas' precision discrete portfolio, engineered specifically for stable, low-drift voltage reference and regulation in space- and power-constrained industrial electronics.
FAQ
What is the zener voltage range for HZM6.8MWATR-E at 5 mA test current?
The HZM6.8MWATR-E has a guaranteed zener voltage range of 6.86 V to 7.14 V when tested at IZ = 5 mA, corresponding to Grade B3 tolerance (±2.5%). This specification is confirmed in the Electrical Characteristics table on page 2 of the R07DS0358EJ0600 datasheet and applies strictly under DC or 40 ms pulse conditions.
Is pin 1 of HZM6.8MWATR-E electrically connected internally?
No - pin 1 of the HZM6.8MWATR-E is designated NC (No Connect) and is not bonded to any internal die structure. Per the Pin Arrangement diagram on page 1 of the datasheet, it must remain unconnected on the PCB; routing or grounding pin 1 may compromise device reliability or cause unexpected behavior.
What is the maximum allowable reverse current before regulation degrades in HZM6.8MWATR-E?
The HZM6.8MWATR-E maintains specified regulation down to 2 μA reverse current at VR = 5 V, but stable zener action requires ≥2 mA to stay within the defined dynamic resistance and voltage tolerance bands. Below 2 mA, VZ deviates significantly - the datasheet specifies electrical characteristics only at IZ = 5 mA, and Fig.1 confirms usable regulation begins above ~1.5 mA.
Can HZM6.8MWATR-E be used in place of a standard 6.8 V Zener diode like 1N4735A?
No - the HZM6.8MWATR-E is not a drop-in replacement for through-hole diodes such as 1N4735A. It uses a 3-pin MPAK package with pin 1 NC, whereas 1N4735A is a 2-pin DO-41 device. Additionally, HZM6.8MWATR-E has tighter tolerance (±2.5% vs. ±5%) and lower Pd (200 mW vs. 1 W), requiring layout and thermal redesign if substituted.
Does HZM6.8MWATR-E meet RoHS and REACH compliance requirements?
Yes - the HZM6.8MWATR-E is RoHS-compliant and meets REACH SVHC requirements, as confirmed by Renesas' environmental compliance documentation referenced in the colophon of R07DS0358EJ0600. It contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and is rated for lead-free reflow soldering.
HZM6.8MWATR-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
HZM6.8MWATR-E FAQ
1.How can I place an order for HZM6.8MWATR-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZM6.8MWATR-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 HZM6.8MWATR-E reliable?
The price and inventory of HZM6.8MWATR-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZM6.8MWATR-E is usually 5 days.
3.What payment methods are accepted for HZM6.8MWATR-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZM6.8MWATR-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZM6.8MWATR-E?
HZM6.8MWATR-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZM6.8MWATR-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 HZM6.8MWATR-E?
For technical support, including HZM6.8MWATR-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZM6.8MWATR-E requirements.
6.How does Aetrix verify that HZM6.8MWATR-E is sourced from the original manufacturer or authorized distributors?
All HZM6.8MWATR-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 HZM6.8MWATR-E meets industry standards.
7.What is the process for return or replacement of HZM6.8MWATR-E?
All HZM6.8MWATR-E units undergo pre-shipment inspection (PSI). If there is an issue with HZM6.8MWATR-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 HZM6.8MWATR-E part is unused and in its original packaging.
Return procedure for HZM6.8MWATR-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZM6.8MWATR-E Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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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
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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