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Renesas HZM3.9NB2TL-E
- Part No.:
- HZM3.9NB2TL-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
HZM3.9NB2TL-E.pdf
- Description:
- DIODE ZENER 3.99V 200MW 3MPAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
HZM3.9NB2TL-E from Renesas Electronics (formerly Hitachi) 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 3.9 V (min 3.87 V, max 4.10 V at IZ = 5 mA), with dynamic resistance of 130 Ω, reverse current ≤10 µA at VR = 1.0 V, and power dissipation up to 200 mW in the MPAK package - commonly used in voltage regulation for sensor biasing and MCU reset circuitry.
For engineers reviewing the HZM3.9NB2TL-E datasheet, HZM3.9NB2TL-E pinout, HZM3.9NB2TL-E application, or HZM3.9NB2TL-E equivalent, key selection criteria include its tight zener voltage tolerance (B2 grade), low dynamic impedance, thermal stability across –55°C to +150°C, and suitability for high-density SMT layouts requiring minimal board area and consistent stabilization under low-current conditions.
Technical Context
The HZM3.9NB2TL-E operates as a two-terminal shunt regulator, maintaining stable output voltage by conducting reverse current when the applied voltage exceeds its specified zener breakdown range. Its epitaxial planar construction ensures reproducible breakdown characteristics and low leakage.
Designed for DC stabilization rather than transient suppression, it exhibits a temperature coefficient near 0 mV/°C (±0.01%/°C typical at ~3.9 V), enabling stable reference performance over ambient temperature variations without external compensation. The device is rated for junction temperatures up to 150°C and storage from –55°C to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.87–4.10 V at IZ = 5 mA - defines precise regulation window for low-voltage reference design |
| Dynamic Resistance (rd) | 130 Ω max - determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | ≤10 µA at VR = 1.0 V - ensures low standby power loss in always-on bias networks |
| Power Dissipation (Pd) | 200 mW - sets maximum continuous stabilization power at Ta = 25°C |
| Junction Temperature (Tj) | 150°C max - defines thermal operating ceiling for reliability in enclosed or high-ambient environments |
| Package | MPAK (SC-59A) - 3-pin surface-mount outline with NC, anode, cathode; enables automated placement and compact layout |
Pinout & Package
MPAK (SC-59A) package: ultra-compact surface-mount outline with 3 terminals, optimized for high-density PCB assembly. Dimensions: 2.8 mm × 1.9 mm × 0.95 mm (L × W × H), weight 0.011 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect (NC) | Electrically isolated terminal; must remain unconnected to avoid parasitic coupling or mechanical stress |
| 2 | Anode | Forward-biased terminal during normal operation; connected to lower-potential node in shunt configuration |
| 3 | Cathode | Zener breakdown terminal; connected to higher-potential node and load to provide regulated voltage reference |
Key Features
| Feature | Design Value |
|---|---|
| Tight Zener Voltage Tolerance (B2 Grade) | 3.87–4.10 V at 5 mA - enables accurate, repeatable voltage setting without post-production trimming |
| Low Dynamic Impedance | 130 Ω max - minimizes output voltage shift under varying load current, critical for stable sensor excitation |
| High-Temperature Operation | Junction rating up to 150°C - supports use in automotive engine control modules and industrial motor drives |
| MPAK Surface-Mount Package | SC-59A footprint with NC/anode/cathode pinout - allows automated pick-and-place and reduces PCB real estate vs. DO-35 |
| Low Reverse Leakage | ≤10 µA at 1.0 V - preserves battery life in portable instrumentation and low-power IoT nodes |
Applications
| Industrial Sensor Biasing | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) and bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Shunt voltage reference element that fixes bias point independent of supply rail fluctuations. Use Value: Maintains measurement accuracy within ±0.5% over –25°C to +85°C ambient due to low tempco and stable rd. |
Use Scenario: Generating a clean, noise-immune reset threshold for 3.3 V microcontrollers in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Precision voltage detection node feeding into dedicated reset supervisor IC or internal brown-out detector. Use Value: Ensures deterministic reset assertion at 3.9 V ±1.5%, eliminating false resets caused by supply ripple or slow ramp-up. |
| Portable Medical Instrumentation | Automotive Cabin Control Module |
|
Use Scenario: Supplying reference voltage to low-power ADCs in handheld pulse oximeters and glucose meters. IC Role / Device Role / Timing Role: Low-leakage voltage clamp stabilizing analog front-end supply rails during battery discharge cycles. Use Value: Enables <1 µA quiescent current in sleep mode while retaining 3.9 V regulation accuracy for wake-up signal integrity. |
Use Scenario: Stabilizing voltage for HVAC actuator drivers and LED backlighting in vehicle infotainment panels. IC Role / Device Role / Timing Role: Secondary local reference protecting sensitive analog interfaces from load-dump transients and alternator ripple. Use Value: Withstands 150°C junction temperature and maintains regulation during 12 V system dips to 9 V, preventing display flicker or command loss. |
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-C3V9 (Nexperia) | Same 3.9 V nominal, SOT-23 package, 90 Ω rd, but no NC pin - 2-terminal only | Lacks NC terminal; requires different PCB layout and offers no isolation benefit for noise-sensitive nodes | Preferred where board space is tighter and NC functionality is unnecessary |
| MMSZ4685 (ON Semiconductor) | 3.9 V nominal, SOD-123 package, 150 Ω rd, 500 mW Pd, no NC pin | Higher power rating but larger footprint; less suitable for ultra-dense layouts requiring MPAK's 2.8 × 1.9 mm size | Chosen when higher surge tolerance is needed and NC isolation is not required |
Compared with BZX84-C3V9 and MMSZ4685, the HZM3.9NB2TL-E provides unique NC-terminal isolation for EMI-sensitive analog sections, tighter B2-grade voltage tolerance, and the smallest standardized footprint among 3.9 V Zeners - making it optimal for space-constrained, high-precision stabilization where terminal separation matters.
Availability
HZM3.9NB2TL-E is available at Aetrix Electronics and suitable for industrial sensor biasing, microcontroller reset circuits, portable medical instrumentation, and automotive cabin control modules requiring stable component supply with guaranteed long-term continuity.
Supply support for HZM3.9NB2TL-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 global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and IoT markets, with roots in Hitachi's semiconductor division.
The HZM-N Series was developed by Hitachi (now Renesas) specifically for high-reliability, low-power voltage stabilization in compact SMT designs - emphasizing tight tolerance grading, thermal stability, and manufacturability in automated assembly lines.
FAQ
What is the exact zener voltage range for HZM3.9NB2TL-E?
The HZM3.9NB2TL-E has a guaranteed zener voltage range of 3.87 V to 4.10 V when tested at IZ = 5 mA and Ta = 25°C. This B2-grade specification reflects tighter distribution than standard B or B1 variants, ensuring predictable regulation in precision analog circuits without calibration.
Does HZM3.9NB2TL-E require a heatsink in standard operation?
No, the HZM3.9NB2TL-E does not require a heatsink under typical operating conditions. With a 200 mW power dissipation rating and MPAK package thermal resistance (junction-to-ambient) of approximately 625°C/W on standard FR-4, it remains within safe junction temperature limits (<150°C) at up to ~125 mW continuous dissipation at 25°C ambient - sufficient for most bias and reference applications.
Can HZM3.9NB2TL-E be used in place of a standard 3.9 V Zener diode like 1N4734A?
No - the HZM3.9NB2TL-E is not a drop-in replacement for through-hole diodes like 1N4734A. It uses a 3-terminal MPAK package with Pin 1 as NC, whereas 1N4734A is a 2-terminal DO-41 device. Substitution would require PCB redesign, new stencil, and validation of NC terminal handling in the circuit layout.
What does the "B2" suffix indicate in HZM3.9NB2TL-E?
The "B2" suffix denotes the zener voltage grade within the HZM-N series: for HZM3.9N, B2 corresponds to the 3.87–4.10 V range at 5 mA. This is the middle tolerance band of the three-grade option (B1/B2/B3), offering better consistency than standard B-grade parts while maintaining cost and availability advantages over B1.
Is the NC pin on HZM3.9NB2TL-E electrically connected internally?
No, Pin 1 (NC) on the HZM3.9NB2TL-E is not electrically connected to any internal semiconductor structure. It is a mechanically defined terminal for mechanical stability and alignment during SMT assembly - leaving it unconnected poses no electrical risk and is required per datasheet guidance to prevent unintended coupling or stress-induced failure.
HZM3.9NB2TL-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.99 V
- Tolerance:
- ±2.88%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 130 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 3-MPAK
HZM3.9NB2TL-E FAQ
1.How can I place an order for HZM3.9NB2TL-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZM3.9NB2TL-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 HZM3.9NB2TL-E reliable?
The price and inventory of HZM3.9NB2TL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZM3.9NB2TL-E is usually 5 days.
3.What payment methods are accepted for HZM3.9NB2TL-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZM3.9NB2TL-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZM3.9NB2TL-E?
HZM3.9NB2TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZM3.9NB2TL-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 HZM3.9NB2TL-E?
For technical support, including HZM3.9NB2TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZM3.9NB2TL-E requirements.
6.How does Aetrix verify that HZM3.9NB2TL-E is sourced from the original manufacturer or authorized distributors?
All HZM3.9NB2TL-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 HZM3.9NB2TL-E meets industry standards.
7.What is the process for return or replacement of HZM3.9NB2TL-E?
All HZM3.9NB2TL-E units undergo pre-shipment inspection (PSI). If there is an issue with HZM3.9NB2TL-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 HZM3.9NB2TL-E part is unused and in its original packaging.
Return procedure for HZM3.9NB2TL-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZM3.9NB2TL-E Tags
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