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Renesas HZS9A1L-JTA-E
- Part No.:
- HZS9A1L-JTA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS9A1L-JTA-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
HZS9A1L-JTA-E from ROHM Semiconductor is a silicon epitaxial planar Zener diode designed for precision voltage stabilization in low-power DC supply rails, with a nominal zener voltage of 7.7–8.1 V at 5 mA test current, dynamic resistance of 20 Ω max, and 400 mW power dissipation rating in a DO-35 (glass axial) package.
For engineers reviewing the HZS9A1L-JTA-E datasheet, HZS9A1L-JTA-E pinout, HZS9A1L-JTA-E application, or HZS9A1L-JTA-E equivalent, key selection criteria include zener voltage tolerance (±0.2 V), low leakage (<1 µA at VR = 5.0 V), temperature coefficient (≈+3.5 mV/°C), and suitability for high-speed automatic insertion on 5 mm pitch PCBs.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage by conducting reverse-biased current above its specified zener breakdown threshold. Its epitaxial planar construction ensures tight VZ distribution and low dynamic impedance across production lots.
Designed for DC-stabilized supplies, it exhibits a positive temperature coefficient (~+3.5 mV/°C) typical of mid-voltage Zeners (7–9 V range), enabling predictable thermal drift behavior in fixed-bias reference circuits without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.7–8.1 V at IZ = 5 mA - defines stable regulation point for biasing or reference applications |
| Dynamic Resistance (rd) | ≤20 Ω at IZ = 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage (IR) | ≤1 µA at VR = 5.0 V - guarantees low standby power loss in always-on circuits |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - supports continuous operation in compact through-hole layouts |
| Junction Temperature (Tj) | −55 to +200°C - enables use in industrial and automotive under-hood environments |
| Package | DO-35 glass axial - compatible with standard 5 mm pitch auto-insertion equipment and wave soldering |
Pinout & Package
DO-35 glass axial package with cathode band marking; leads are unmarked but oriented with cathode (banded end) designated as Terminal 1 per outline drawing ADE-208-120A(Z).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to higher potential node; reverse-biased conduction path during regulation |
| 2 (Non-banded End) | Anode | Connected to circuit ground or lower potential; completes shunt current path |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 20 Ω max ensures <10 mV output shift for ±1 mA load change at 5 mA bias |
| Wide VZ spectrum | 7.7–8.1 V range supports precise matching to 8 V logic supply rails or op-amp reference nodes |
| High-speed insertion compatibility | 5 mm lead pitch and straight axial geometry enable automated placement without bending or orientation error |
| Stable thermal coefficient | +3.5 mV/°C allows predictable drift compensation in temperature-critical analog front-ends |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADC input stages in pressure or temperature transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 8 V rail for op-amp gain-setting and ADC VREF. Use Value: Low 20 Ω rd minimizes code-dependent offset drift across full-scale input range. | Use Scenario: Generating clean, noise-immune reset threshold for 3.3 V microcontrollers in factory automation PLCs. IC Role / Device Role / Timing Role: Zener-clamped voltage divider feeding RC network to reset supervisor IC. Use Value: ≤1 µA leakage prevents premature discharge of timing capacitor, ensuring reliable power-on reset timing. |
| LED Driver Bias Reference | Legacy RS-232 Line Receiver Supply |
Use Scenario: Setting constant-current source for indicator LEDs in medical diagnostic panels. IC Role / Device Role / Timing Role: Voltage reference for LM317-based adjustable current regulator. Use Value: Tight 7.7–8.1 V tolerance maintains ±2% LED brightness consistency across production units. | Use Scenario: Deriving ±12 V auxiliary supply from single 24 V rail for RS-232 transceivers in embedded gateways. IC Role / Device Role / Timing Role: Zener clamp in charge-pump feedback loop to regulate negative rail voltage. Use Value: 400 mW Pd rating supports sustained 15 mA sink current without thermal derating at 70°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | Zener voltage 5.1 V (fixed), 1 W Pd, DO-41 package, rd = 9 Ω | Lower VZ and higher power rating limit direct substitution in 8 V reference designs | Select only if redesigning for 5.1 V rail and requiring higher surge tolerance |
| BZX55C8V2 | Zener voltage 8.2 V (±5%), 500 mW Pd, DO-35, rd = 25 Ω | Wider VZ tolerance and higher rd reduce precision in low-drift references | Acceptable where ±5% regulation accuracy suffices and 8.2 V matches system target |
Compared with 1N4733A and BZX55C8V2, the HZS9A1L-JTA-E offers tighter 7.7–8.1 V tolerance, lower 20 Ω dynamic resistance, and optimized thermal coefficient for stable 8 V references-making it preferable for precision analog and industrial control applications where voltage drift must remain below ±10 mV over temperature.
Availability
HZS9A1L-JTA-E is available at Aetrix Electronics and suitable for industrial sensor conditioning, microcontroller reset circuits, LED bias references, and RS-232 line receiver supplies requiring stable component supply with consistent parametric performance across production batches.
Supply support for HZS9A1L-JTA-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
ROHM Semiconductor is a Japanese semiconductor manufacturer specializing in analog, power, and sensor solutions for automotive, industrial, and consumer electronics.
The HZS Series was developed specifically for high-reliability, low-drift voltage stabilization in space-constrained through-hole power supply designs-emphasizing tight VZ grading, low leakage, and compatibility with automated assembly.
FAQ
What is the exact zener voltage range for HZS9A1L-JTA-E?
The HZS9A1L-JTA-E has a guaranteed zener voltage range of 7.7 V to 8.1 V when tested at IZ = 5 mA and Ta = 25°C. This grade (A1) reflects the tightest tolerance bin within the HZS9 family and is confirmed in ROHM's ADE-208-120A(Z) datasheet Rev 1, page 4.
Is HZS9A1L-JTA-E suitable for surface-mount assembly?
No, HZS9A1L-JTA-E uses a DO-35 glass axial package with radial leads intended for through-hole mounting and wave soldering. It is not compatible with reflow or pick-and-place SMT processes. For SMT alternatives, consider ROHM's UDZS series Schottky Zeners in SOD-323 packages.
What is the maximum reverse leakage current for HZS9A1L-JTA-E?
The maximum reverse leakage current for HZS9A1L-JTA-E is 1 µA at VR = 5.0 V and Ta = 25°C. This value is specified in the Electrical Characteristics table on page 4 of the official datasheet and ensures minimal quiescent current draw in always-on reference circuits.
Does HZS9A1L-JTA-E have a specified temperature coefficient?
Yes, HZS9A1L-JTA-E exhibits a typical temperature coefficient of +3.5 mV/°C, as shown in Figure 2 of the datasheet. This positive coefficient is characteristic of Zeners in the 7–9 V range and enables predictable voltage drift modeling in temperature-varying environments.
Can HZS9A1L-JTA-E replace a 1N4733A in an existing design?
No-HZS9A1L-JTA-E (7.7–8.1 V) and 1N4733A (5.1 V) differ significantly in zener voltage and cannot be substituted without circuit revision. Additionally, their DO-35 vs. DO-41 packages require different footprint and hole sizes, making direct replacement mechanically incompatible.
HZS9A1L-JTA-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:
- -
HZS9A1L-JTA-E FAQ
1.How can I place an order for HZS9A1L-JTA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS9A1L-JTA-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 HZS9A1L-JTA-E reliable?
The price and inventory of HZS9A1L-JTA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS9A1L-JTA-E is usually 5 days.
3.What payment methods are accepted for HZS9A1L-JTA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS9A1L-JTA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS9A1L-JTA-E?
HZS9A1L-JTA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS9A1L-JTA-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 HZS9A1L-JTA-E?
For technical support, including HZS9A1L-JTA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS9A1L-JTA-E requirements.
6.How does Aetrix verify that HZS9A1L-JTA-E is sourced from the original manufacturer or authorized distributors?
All HZS9A1L-JTA-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 HZS9A1L-JTA-E meets industry standards.
7.What is the process for return or replacement of HZS9A1L-JTA-E?
All HZS9A1L-JTA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS9A1L-JTA-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 HZS9A1L-JTA-E part is unused and in its original packaging.
Return procedure for HZS9A1L-JTA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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