UDZSTE-1727B ROHM Semiconductor Zener Diode (Small Outline Diode Flat Lead) In Stock
UDZSTE-1727B is a single-element silicon Zener diode from ROHM Semiconductor, housed in a compact 2-pin SC-76 (UMD2/MINIMOLD) SMD package with a maximum dynamic impedance of 150 ohms. Ideal for voltage regulation and clamping in space-constrained circuits. From $0.05 in stock worldwide shipping.
- Manufacturer
- ROHM Semiconductor
- Package
- Small Outline Diode Flat Lead
- Pin Count
- 2
- Lifecycle
- END OF LIFE
- Datasheet
- UDZSTE-1727B Datasheet PDF
- Category
- Zener Diode
- Temp Range
- ?°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Single silicon Zener diode with up to 150 ohm maximum dynamic impedance for precise voltage regulation
- Ultra-compact SC-76 (UMD2/MINIMOLD) 2-pin package enabling minimal PCB footprint in portable and wearable designs
- RoHS-compliant lead-free construction (JESD-609 e1) suitable for environmentally conscious manufacturing
- Flat-lead SOD package profile supports low-profile surface-mount assembly on fine-pitch PCB pads
Applications
UDZSTE-1727B is used for voltage clamping and reference regulation in mobile devices, wearable electronics, and IoT sensor nodes where board space is critical and a compact 2-pin SC-76 package is required. Its Zener regulation characteristics suit protection circuits in battery-powered equipment, ensuring signal lines stay within safe voltage limits under transient conditions. The part is also employed in low-power consumer electronics for bias supply stabilization and ESD-sensitive input protection.
Specifications
| Pbfree Code | Yes |
| Date Of Intro | 1997-07-01 |
| YTEOL | 1 |
| Configuration | SINGLE |
| Diode Element Material | SILICON |
| Diode Type | ZENER DIODE |
| Dynamic Impedance-Max | 150Ω |
| JESD-30 Code | R-PDSO-F2 |
| JESD-609 Code | e1 |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Polarity | UNIDIRECTIONAL |
| Power Dissipation-Max | 0.2W |
| Qualification Status | Not Qualified |
| Reference Voltage-Nom | 27V |
| Surface Mount | YES |
| Technology | ZENER |
| Terminal Finish | Tin/Silver/Copper (Sn/Ag/Cu) |
| Terminal Form | FLAT |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Tol-Max | 2.49% |
| Working Test Current | 5mA |
| Package | Small Outline Diode Flat Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8541.10.00.50 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum dynamic impedance of UDZSTE-1727B, and how does it affect voltage regulation performance?
UDZSTE-1727B has a maximum dynamic impedance of 150 ohms at its rated operating point. Higher dynamic impedance means the Zener voltage varies more with load current, so this part is best suited for low-current regulation applications where the load current change is small. For tighter voltage regulation, pairing it with a series resistor sized to the expected current range helps minimize output voltage deviation in voltage-clamping circuits.
In what kind of board space conditions does the SC-76 package of UDZSTE-1727B offer a design advantage over SOD-123 Zener diodes?
The SC-76 (UMD2/MINIMOLD) package occupied by UDZSTE-1727B has a body smaller than a standard SOD-123 package, with a 2-pin flat-lead outline measuring approximately 1.0 x 0.6 mm compared to the SOD-123's 2.7 x 1.35 mm footprint. This size difference of over 4x makes the SC-76 preferable in ultra-compact wearable devices, hearing aids, and miniature IoT modules where every square millimeter of PCB area is precious.
How does UDZSTE-1727B's RoHS compliance benefit procurement for products sold in the European Union?
UDZSTE-1727B carries a lead-free (Pbfree) designation conforming to JESD-609 code e1, meaning it uses a tin-based solder finish free of lead and other restricted substances under the EU RoHS Directive 2011/65/EU. Products incorporating this part can be sold in EU markets without exemption for Zener diode content, simplifying Declaration of Conformity (DoC) documentation and reducing supply chain compliance overhead for consumer and industrial electronics manufacturers shipping to Europe.
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