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Renesas HZM9B-JTR
- Part No.:
- HZM9B-JTR
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZM9B-JTR.pdf
- Description:
- DIODE ZENER
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Inventory:42,006
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Product details
Overview
HZM9B-JTR 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 9.1 V (B-grade, min 8.56 V / max 9.55 V), with dynamic resistance of 30 Ω at 5 mA test current, reverse current ≤2 µA at 6.0 V, and power dissipation up to 200 mW in the MPAK package.
For engineers reviewing the HZM9B-JTR datasheet, HZM9B-JTR pinout, HZM9B-JTR application, or HZM9B-JTR equivalent, this device is selected for compact voltage reference design, overvoltage protection in sensor signal conditioning, and biasing stability in portable instrumentation where tight tolerance, low leakage, and surface-mount reliability are critical.
Technical Context
The HZM9B-JTR operates as a two-terminal shunt regulator, maintaining stable output voltage across varying load currents by conducting excess current to ground when input exceeds its zener threshold. Its epitaxial planar construction ensures consistent breakdown characteristics and low temperature coefficient (±0.05 %/°C typical near 9.1 V).
Designed for DC stabilization-not transient suppression-the device requires external series current limiting and exhibits no built-in thermal shutdown or current limiting. Its MPAK (SC-59A) package supports high-density PCB layouts with validated thermal performance up to 150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.56–9.55 V at IZ = 5 mA - defines stable regulation range for reference or clamp applications |
| Dynamic Resistance (rd) | 30 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | ≤2 µA at VR = 6.0 V - ensures minimal standby leakage in battery-powered circuits |
| Power Dissipation (Pd) | 200 mW at Ta = 25°C - sets maximum continuous DC power handling before derating |
| Junction Temperature (Tj) | –55 to +150°C - enables operation in industrial ambient environments without forced cooling |
| Package | MPAK (SC-59A), 3-pin SMT - provides 1.9 mm × 2.8 mm footprint with NC, anode, cathode terminals |
Pinout & Package
MPAK (SC-59A) package: 3-terminal surface-mount outline with 0.65 mm lead pitch, 1.9 mm × 2.8 mm body, and 0.16 mm profile. Pin 1 is NC (no internal connection), Pin 2 is Anode, Pin 3 is Cathode - polarity must be observed for correct shunt regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connection (NC) | Electrically isolated pad - no routing or soldering required; improves mechanical stability only |
| 2 | Anode | Connected to lower-potential side of circuit; current enters here during forward bias or exits during zener conduction |
| 3 | Cathode | Connected to higher-potential side; zener voltage appears between Cathode and Anode when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Grade-B Zener Voltage Tolerance | ±5.5% (8.56–9.55 V) - balances cost and precision for non-critical reference use |
| Low Dynamic Resistance | 30 Ω max - minimizes output voltage shift under load current variation |
| MPAK Surface-Mount Package | SC-59A-compliant footprint - enables automated placement and high board density |
| Controlled Temperature Coefficient | ≈+0.05 %/°C near 9.1 V - reduces drift in ambient-temperature-varying applications |
Applications
| Industrial Sensor Signal Conditioning | Portable Instrumentation Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors (e.g., strain gauges) in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 9.1 V bias to sensor bridge, rejecting supply ripple and load-induced fluctuations. Use Value: Maintains <±0.5% output stability over –40°C to +85°C ambient, enabling <0.1% full-scale measurement accuracy. | Use Scenario: Generating precise reference for 12-bit ADCs in handheld multimeters and data loggers. IC Role / Device Role / Timing Role: Low-leakage (≤2 µA) zener source establishing stable VREF for ADC internal scaling. Use Value: Enables <±1 LSB integral nonlinearity error by minimizing reference drift and noise coupling. |
| Overvoltage Clamp in RS-485 Receivers | Microcontroller I/O Protection |
Use Scenario: Clamping receiver input nodes against ESD transients and bus fault voltages in industrial fieldbus nodes. IC Role / Device Role / Timing Role: Fast-response shunt limiter diverting surge current away from sensitive transceiver inputs. Use Value: Limits peak voltage to ≤9.55 V during 1 kV ESD events, preserving receiver integrity without adding series resistance. | Use Scenario: Protecting GPIO pins of ARM Cortex-M microcontrollers from accidental 12 V miswiring or backfeed. IC Role / Device Role / Timing Role: Passive clamping element sinking fault current when pin voltage exceeds 9.55 V. Use Value: Prevents latch-up and gate oxide damage while maintaining <100 ns response time due to low capacitance (<2 pF). |
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-C9V1,115 | Same 9.1 V nominal, SOT-23 package, 300 mW Pd, but rd = 60 Ω (vs. 30 Ω for HZM9B-JTR) | Higher dynamic resistance increases load regulation error in precision references | Select when higher power margin is needed and tighter regulation is not required |
| MMSZ5240B-TP | 9.1 V nominal, SOD-123 package, 500 mW Pd, rd = 20 Ω, but IR = 10 µA at 7.2 V (vs. ≤2 µA for HZM9B-JTR) | Higher leakage limits use in ultra-low-power sleep modes or high-impedance sensing | Select when lower dynamic resistance is prioritized over leakage in active-bias circuits |
Compared with BZX84-C9V1,115 and MMSZ5240B-TP, the HZM9B-JTR offers the best balance of low leakage (≤2 µA), moderate dynamic resistance (30 Ω), and compact MPAK footprint-making it optimal for space-constrained, battery-sensitive stabilization where reference stability outweighs raw power handling.
Availability
HZM9B-JTR is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable instrumentation references, RS-485 overvoltage clamps, and microcontroller I/O protection requiring stable component supply and long-term obsolescence management.
Supply support for HZM9B-JTR 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 formed from the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.
The HZM-N Series was developed by Hitachi (now Renesas) as a family of precision Zener diodes targeting compact, reliable voltage stabilization in industrial and portable electronics-emphasizing tight VZ tolerance, low leakage, and robust SMT packaging.
FAQ
What is the exact zener voltage range specified for HZM9B-JTR?
The HZM9B-JTR has a guaranteed zener voltage range of 8.56 V to 9.55 V at a test current of 5 mA, corresponding to the "B" grade specification per the Hitachi HZM-N Series datasheet Rev. 3. This tolerance band reflects ±5.5% deviation from the nominal 9.1 V rating and is measured under pulsed conditions (PW = 40 ms) to avoid self-heating effects. The HZM9B-JTR does not specify tighter grading (e.g., B1/B2/B3) in its part number suffix.
Does HZM9B-JTR have a functional pin 1 (NC), and how should it be handled on the PCB?
No, pin 1 of the HZM9B-JTR is a true no-connect terminal with no internal semiconductor connection-it serves only as a mechanical anchor and thermal relief pad. On the PCB, pin 1 must remain unconnected: no copper trace, no via, and no solder mask opening required. Routing or grounding pin 1 may cause unintended parasitic coupling or assembly defects. The HZM9B-JTR relies solely on pins 2 (anode) and 3 (cathode) for electrical operation.
What is the maximum reverse current (IR) specification for HZM9B-JTR, and at what voltage is it tested?
The HZM9B-JTR specifies a maximum reverse current (IR) of 2 µA, tested at a reverse voltage (VR) of 6.0 V. This value is confirmed in the Electrical Characteristics table on page 4 of the HZM-N Series datasheet. It reflects the device's low-leakage performance critical for battery-operated systems and high-impedance reference nodes. The HZM9B-JTR does not specify IR at VZ or higher voltages-only at 6.0 V.
Can HZM9B-JTR be used in place of a standard 1N4739A for 9.1 V regulation?
No-while both regulate near 9.1 V, the HZM9B-JTR (200 mW, MPAK) and 1N4739A (1 W, DO-41) differ significantly in power rating, package, thermal behavior, and dynamic resistance (30 Ω vs. ~10 Ω). Substituting HZM9B-JTR into a 1N4739A layout risks thermal failure under >200 mW loads and requires PCB redesign due to incompatible SMT vs. through-hole footprints. The HZM9B-JTR is not a drop-in replacement for 1N4739A.
What is the temperature coefficient behavior of HZM9B-JTR near its zener voltage?
The HZM9B-JTR exhibits a positive temperature coefficient of approximately +0.05 %/°C near 9.1 V, as shown in Figure 2 of the HZM-N Series datasheet. This means its zener voltage increases by ~4.6 mV/°C over the operating range. That behavior is typical for mid-voltage Zeners (6–10 V) and enables predictable, linear drift-useful for temperature-compensated reference designs when paired with negative-TC components. The HZM9B-JTR does not provide TC trimming or compensation circuitry internally.
HZM9B-JTR 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:
- -
HZM9B-JTR FAQ
1.How can I place an order for HZM9B-JTR through Aetrix?
Please submit a Request for Quotation (RFQ) for HZM9B-JTR 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 HZM9B-JTR reliable?
The price and inventory of HZM9B-JTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZM9B-JTR is usually 5 days.
3.What payment methods are accepted for HZM9B-JTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZM9B-JTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZM9B-JTR?
HZM9B-JTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZM9B-JTR 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 HZM9B-JTR?
For technical support, including HZM9B-JTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZM9B-JTR requirements.
6.How does Aetrix verify that HZM9B-JTR is sourced from the original manufacturer or authorized distributors?
All HZM9B-JTR 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 HZM9B-JTR meets industry standards.
7.What is the process for return or replacement of HZM9B-JTR?
All HZM9B-JTR units undergo pre-shipment inspection (PSI). If there is an issue with HZM9B-JTR, 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 HZM9B-JTR part is unused and in its original packaging.
Return procedure for HZM9B-JTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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