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onsemi MZ4620RL
- Part No.:
- MZ4620RL
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
MZ4620RL.pdf
- Description:
- DIODE ZENER 3.3V 0.5W 5% UNIDIR
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MZ4620RL from Motorola is a 500 mW, DO-35 glass-encapsulated Zener voltage regulator diode with a nominal zener voltage of 20 V ±5%, specified at 5 mA test current, 7 Ω maximum dynamic impedance, and 0.05 µA maximum reverse leakage at 15 V. It operates across –65°C to +200°C and serves as a precision reference or overvoltage clamp in low-power analog power rails.
For engineers reviewing the MZ4620RL datasheet, pinout, applications, or equivalent options, this device is selected for stable 20 V regulation in space-constrained industrial sensor interfaces, legacy automotive control modules, and battery-backed RTC circuits where hermetic glass reliability and low-temperature coefficient are critical.
Technical Context
MZ4620RL uses double-slug, metallurgically bonded construction inside a hermetically sealed DO-204AH (DO-35) glass package, enabling robust thermal performance with 30–40°C/W lead-to-ambient thermal resistance. Its zener voltage is measured at thermal equilibrium with 3/8″ lead length and 30°C lead temperature.
The device exhibits a positive temperature coefficient of +0.08 °C⁻¹ (typical), confirmed in the 18–22 V range, and delivers sharp breakdown with 7 Ω dynamic impedance at 5 mA - optimized for low-current regulation down to 100 µA without significant voltage drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 20 V ±5% at IZT = 5 mA - defines regulated output under standard bias, usable as reference in 18–22 V tolerance bands |
| Power Dissipation | 500 mW at TL ≤ 75°C - supports continuous operation in ambient up to 75°C with 3/8″ leads; derates linearly above |
| Zener Impedance | 7 Ω max at IZT = 5 mA, f = 1 kHz - ensures <±20 mV regulation error across 1–10 mA load variation |
| Reverse Leakage | 0.05 µA max at VR = 15 V, TA = 25°C - enables ultra-low standby current in battery-critical applications |
| Operating Temperature | –65°C to +200°C - validated for under-hood automotive, downhole, and high-reliability industrial environments |
| Package | DO-204AH (DO-35) glass - hermetic seal prevents moisture ingress; compatible with wave and hand soldering at 230°C for 10 s |
Pinout & Package
DO-204AH (DO-35) glass package: axial-leaded, hermetically sealed, double-slug construction. Cathode indicated by color band; anode is unmarked lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node in zener mode | Connected to system ground or lower-potential rail; carries full zener current when regulating |
| Cathode | Regulated output node in zener mode | Provides stable 20 V output relative to anode; marked with color band for polarity identification |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass encapsulation | Prevents long-term parameter drift due to humidity or contaminants - essential for 15+ year field life in sealed enclosures |
| Double-slug thermal design | Reduces junction-to-lead thermal resistance to ~30°C/W - improves power handling vs. single-slug DO-204AA equivalents |
| Low-level zener characterization | Specified at IZT = 5 mA - matches typical bias currents in op-amp reference buffers and comparator hysteresis networks |
| Positive tempco (+0.08%/°C) | Compensates negative tempcos of silicon sensors or transistors - enables stable composite references in analog front-ends |
| Metallurgical bonding | Eliminates wire-bond fatigue failure modes - qualified for shock/vibe environments per MIL-STD-202 |
Applications
| Industrial Sensor Reference | Automotive ECU Clamp |
|---|---|
Use Scenario: Providing stable excitation voltage to bridge-based pressure sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix 20 V rail independent of input fluctuations. Use Value: Maintains <±0.5% sensor gain accuracy over –40°C to +85°C ambient, enabled by low tempco and hermetic stability. |
Use Scenario: Clamping transient spikes on 24 V supply lines in engine control units exposed to load-dump events. IC Role / Device Role / Timing Role: Shunt protection element absorbing short-duration surges while limiting voltage to 20 V. Use Value: Survives 100 W non-repetitive surge pulses (per Fig. 7a) without degradation, preserving downstream MCU integrity. |
| RTC Backup Regulator | Legacy Telecom Line Card |
Use Scenario: Generating clean 20 V bias for real-time clock ICs during main power loss, powered by supercapacitor. IC Role / Device Role / Timing Role: Low-leakage voltage reference maintaining regulation at <1 µA quiescent current. Use Value: 0.05 µA max IR at 15 V extends supercapacitor hold-up time by >30% versus higher-leakage alternatives. |
Use Scenario: Setting bias points for discrete transistor amplifiers on telecom line interface cards requiring long-life calibration. IC Role / Device Role / Timing Role: Precision DC reference establishing stable collector-emitter voltages in analog signal paths. Use Value: Double-slug construction ensures <0.1% voltage shift after 1000 thermal cycles - critical for field recalibration intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX79C20RL | Same 20 V ±5%, DO-35 package, but 5 mA IZT, 55 Ω ZZT, +0.08%/°C tempco - higher impedance, identical thermal envelope | Suitable for less demanding regulation where ±50 mV error is acceptable; not recommended for precision feedback loops | Select BZX79C20RL only if cost sensitivity outweighs regulation accuracy requirements |
| 1N5240B | 20 V ±5%, DO-35, 20 mA IZT, 600 Ω ZZT, +0.086%/°C - higher test current, much higher impedance, JEDEC-registered | Used in general-purpose voltage clamping; unsuitable for low-current references due to poor low-IZ regulation | Choose 1N5240B only for high-current shunt applications (>5 mA), not for sensor or RTC use cases |
Compared with BZX79C20RL and 1N5240B, MZ4620RL delivers superior low-current regulation (7 Ω vs. 55–600 Ω) and tighter thermal stability - making it the sole choice for precision 20 V references below 1 mA, despite shared voltage rating and package.
Availability
MZ4620RL is available at Aetrix Electronics and suitable for industrial sensor references, automotive ECU clamping, and RTC backup regulators requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for MZ4620RL 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
Motorola Semiconductor (now part of ON Semiconductor) pioneered high-reliability discrete semiconductors for automotive and industrial markets, emphasizing hermetic packaging and rigorous qualification.
MZ4620RL belongs to Motorola's 500 mW DO-35 Zener family designed for applications demanding long-term parametric stability, wide temperature operation, and immunity to environmental aging - especially in safety-critical and maintenance-free systems.
FAQ
What is the zener voltage tolerance and test condition for MZ4620RL?
MZ4620RL has a nominal zener voltage of 20 V with ±5% tolerance, measured at IZT = 5 mA, lead temperature of 30°C ±1°C, and 3/8″ lead length. This ensures consistent regulation behavior under standardized thermal conditions used in production testing and circuit design.
Can MZ4620RL be used in surface-mount designs?
No - MZ4620RL is strictly an axial-leaded DO-204AH (DO-35) glass package and requires through-hole mounting. It lacks SMD-compatible terminations or reflow-rated construction; substitution with SMT Zeners like BZX84-C20 requires redesign due to different thermal and electrical characteristics.
What is the maximum surge power MZ4620RL can withstand?
MZ4620RL supports up to 100 W peak non-repetitive surge power for pulse widths ≤10 ms (per Figure 7a), applicable to 1.8–91 V devices. At 20 V, this corresponds to ~5 A transient current - sufficient for ISO 7637-2 Load Dump protection in 24 V automotive systems when properly fused.
How does MZ4620RL's temperature coefficient affect regulation accuracy?
MZ4620RL has a typical temperature coefficient of +0.08%/°C, meaning its zener voltage increases by ~16 mV per 10°C rise above 25°C. Over –40°C to +85°C, total drift is ~200 mV - acceptable for non-critical references but requires compensation in high-accuracy applications.
Is MZ4620RL RoHS compliant?
MZ4620RL was manufactured prior to RoHS enforcement and contains leaded glass and solder finishes. It is not RoHS-compliant; for compliant alternatives, consider ON Semiconductor's BZX84-C20LT1G (SOT-23) or Diodes Inc.'s BZT52-B20 (SOD-123), both requiring layout and thermal redesign.
MZ4620RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- 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:
- -
MZ4620RL FAQ
1.How can I place an order for MZ4620RL through Aetrix?
Please submit a Request for Quotation (RFQ) for MZ4620RL 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 MZ4620RL reliable?
The price and inventory of MZ4620RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MZ4620RL is usually 5 days.
3.What payment methods are accepted for MZ4620RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MZ4620RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MZ4620RL?
MZ4620RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MZ4620RL 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 MZ4620RL?
For technical support, including MZ4620RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MZ4620RL requirements.
6.How does Aetrix verify that MZ4620RL is sourced from the original manufacturer or authorized distributors?
All MZ4620RL 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 MZ4620RL meets industry standards.
7.What is the process for return or replacement of MZ4620RL?
All MZ4620RL units undergo pre-shipment inspection (PSI). If there is an issue with MZ4620RL, 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 MZ4620RL part is unused and in its original packaging.
Return procedure for MZ4620RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MZ4620RL Tags
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BZT52C5V6T-7
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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SMAJ4744A-TP
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