CMPZDC15V TR - 15V 350mW Dual Common Cathode Zener | Central Semiconductor
MPN: CMPZDC15V TR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
CMPZDC15V TR Overview
A Zener diode is a voltage regulator diode that conducts in reverse breakdown at a precisely defined voltage, holding that voltage across its terminals over a wide range of reverse current. Placing two Zener junctions in a dual, common cathode package lets one three-terminal SOT-23 footprint clamp or regulate two independent nodes, or serve both polarities of a symmetric clamp, saving board area versus two discrete diodes.
Key features include the dual common cathode topology, a 350 mW total power dissipation rating, a nominal 15V zener voltage with a 13.8V to 15.6V specification window, and an 11 mA zener test current (IZT) as the reference point for the stated tolerance. The lead-free PBFREE variant (CMPZDC15V TR PBFREE) is listed by Mouser for RoHS-driven designs.
The device is fabricated as a silicon planar Zener structure, and its marked part is identified by the marking code CCY4. Because both junctions share a single cathode terminal, thermal coupling between the two diodes is good, giving similar breakdown behavior across both elements.
Typical applications include voltage clamping on signal and power nodes in industrial, commercial, entertainment, and computer equipment, as well as bias stabilization and low-current shunt regulation.
Designers should size series resistance so that worst-case zener current keeps total dissipation under 350 mW, and verify tolerance budgeting against the 13.8V to 15.6V window rather than the nominal 15V.
This page synthesizes distributor inventory data, drop-in alternative analysis, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for CMPZDC15V TR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
CMPZDC15V TR PBFREE
β Drop-Inπ Reference alternative (not in catalog)
CMPZDC14V TR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
CMPZDC16V TR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
CMPZDC15V TR Maximum Ratings & Electrical Characteristics
| Product Type | Dual Zener Diode, Common Cathode |
| Zener Voltage (Nominal) | 15 V |
| Zener Voltage Range (at IZT) | 13.8 V to 15.6 V |
| Zener Test Current (IZT) | 11 mA |
| Power Dissipation | 350 mW |
| Configuration | Dual, Common Cathode |
| Technology | Silicon Zener (planar) |
| Mounting Type | Surface Mount |
| Package | SOT-23 (surface mount, per manufacturer part page) |
| Packaging | Tape and Reel (TR) |
| Marking Code | CCY4 |
| Series | CMPZDC2V4 thru CMPZDC47V (2.4 V to 47 V) |
| Pb-Free Variant | CMPZDC15V TR PBFREE |
| RoHS Status | Standard version contains lead; PBFREE variant available |
CMPZDC15V TR sot-23 (surface mount, per manufacturer part page) Pin Configuration Guide
Pin configuration for CMPZDC15V TR (sot-23 (surface mount, per manufacturer part page) package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for CMPZDC15V TR.
Refer to the datasheet for full pin configuration.
Typical Applications
CMPZDC15V TR is suitable for 6 applications: Industrial Voltage Clamping, Computer and Peripheral Board Protection, Consumer Entertainment Equipment, Low-Current Shunt Regulation, Gate and Bias Voltage Stabilization, Signal-Line Symmetric Clamping.
Industrial Voltage Clamping
The CMPZDC15V fits industrial I/O and sensor-interface protection because its 13.8V to 15.6V breakdown window sits above 12V logic rails and just above 15V analog signal excursions, clamping transients before they reach sensitive circuitry. In common cathode configuration, both zener junctions reference one node, so two signal lines sharing a ground or rail reference can each be protected with a single three-terminal device. At 350 mW total dissipation and an 11 mA test current, the part absorbs moderate fault energy when paired with a series current-limiting resistor sized so worst-case zener current keeps junction dissipation within rating. Industrial environments benefit from the silicon zener's fast, avalanche-mode response with no recovery-time penalty.
Recommended
Computer and Peripheral Board Protection
Computer motherboards, add-in cards, and peripherals commonly clamp 15V-class accessory rails and connector pins, and the CMPZDC15V addresses this directly: its nominal 15V breakdown means it stays dormant during normal 12V operation with margin, yet conducts on overvoltage faults. The dual common cathode package protects two independent pins per component, reducing placement count on dense boards. With 350 mW dissipation capability, it handles sustained low-current fault conditions, though series impedance must limit current during hard shorts. The tape-and-reel TR packaging suits high-volume SMT assembly. For lead-free manufacturing mandates, specify the CMPZDC15V TR PBFREE variant, which is electrically identical but RoHS compliant.
Recommended
Consumer Entertainment Equipment
The CMPZDC2V4 series datasheet explicitly targets entertainment applications, and a 15V dual zener suits set-top boxes, audiovisual equipment, and gaming hardware where accessory or motor-supply rails near 15V need overvoltage clamping. In these cost-sensitive products, the dual package cuts bill-of-materials count: one SOT-23 replaces two discrete zeners wherever two nodes share a common reference. The 13.8V to 15.6V tolerance window is wide enough for protection duty, where the objective is preventing damage rather than precise regulation. Designers should derate the 350 mW rating for enclosed, warm chassis environments and verify the marking code CCY4 during incoming inspection of assembled boards.
Recommended
Low-Current Shunt Regulation
Used as a shunt element, the CMPZDC15V holds an unloaded node near 15V by conducting excess current in reverse breakdown, with the 11 mA zener test current defining the operating point where the 13.8V to 15.6V specification applies. A series dropping resistor from a higher supply sets the bias: Estimated: from a 24V rail, a 620 ohm resistor yields roughly (24 - 15) / 620 = 14.5 mA of zener current at no load, dissipating about 218 mW in the diode, within the 350 mW rating. Because zener impedance and temperature coefficient data were not captured for this page, precision designs must consult the datasheet; for coarse bias or clamp duty the part is well suited.
Recommended
Gate and Bias Voltage Stabilization
Power-stage designs often need a stable bias clamp on MOSFET gate-drive supplies or auxiliary rails, and the CMPZDC15V's 15V breakdown conveniently matches the absolute maximum gate-source rating of many standard silicon MOSFETs, clamping gate drive before device damage occurs. Placed from gate to source with the common cathode topology, one dual zener can protect both gates of a half-bridge pair referenced to their common point. The zener conducts only on excursions beyond 13.8V minimum, so normal drive levels up to 12V pass unimpeded with negligible leakage. Designers should confirm gate-drive swing stays below the zener window minimum to avoid unintended clamping losses during switching transitions.
Recommended
Signal-Line Symmetric Clamping
Two zener junctions in one common cathode package enable single-ended clamp networks on pairs of signal lines referenced to a shared node, a pattern common in sensor buses, instrumentation front ends, and audio signal protection. The CMPZDC15V's 15V nominal breakdown suits lines whose normal swing stays below roughly 13V, preserving headroom while catching fault transients. Avalanche-mode zeners respond within nanoseconds, faster than most transient events propagate. The dual package also guarantees the two junctions were processed together, giving closely matched breakdown voltages - useful where line-to-line symmetry matters, such as differential signaling protection. Match the series resistance to expected fault current so the 350 mW package rating is respected during sustained faults.
Recommended
Recommended Products Summary
Engineering reference data for CMPZDC15V TR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CMPZDC15V TR PBFREE | CMPZDC14V TR | CMPZDC16V TR |
|---|---|---|---|---|
| Package | SOT-23 (surface mount) | SOT-23 (surface mount) - same | SOT-23 (surface mount) - same | SOT-23 (surface mount) - same |
| Brand | Central Semiconductor Corp | Central Semiconductor Corp | Central Semiconductor Corp | Central Semiconductor Corp |
| Configuration | Dual, Common Cathode | Dual, Common Cathode | Dual, Common Cathode | Dual, Common Cathode |
| Nominal Zener Voltage | 15 V | 15 V | 14 V | 16 V |
| Power Dissipation | 350 mW | 350 mW | 350 mW | 350 mW |
Key Differentiators
- Dual common cathode integration saves board space (vs CMPZDC14V TR)
- Lead-free variant available without redesign (vs CMPZDC15V TR (standard))
- Trade-off: wide tolerance window limits precision use (vs CMPZDC16V TR)
Design Notes
Size the series resistance so worst-case zener current keeps total package dissipation below 350 mW. Estimated: at the 11 mA test current and a 15V drop, one conducting junction dissipates about 165 mW; if both junctions conduct simultaneously, combined dissipation must still fit within the 350 mW total rating. For a 24V rail shunt application, a 620 ohm series resistor gives roughly 14.5 mA zener bias (~218 mW) at no load. Apply the manufacturer derating curve above the reference ambient temperature.
Do not design to the nominal 15V value: the specified window is 13.8V to 15.6V at 11 mA, roughly plus-or-minus 6%. Precision clamp thresholds, leakage-margin analysis, and gate-protection schemes must be verified against the window extremes. Also confirm which junction of the dual device each circuit node uses, since both anodes share one cathode - independent-cathode topologies cannot use this part. Finally, order the PBFREE suffix for any RoHS-governed new build; the standard TR version contains lead.
Provide a short, low-inductance return path from the common cathode terminal to the reference node, and place the zener physically near the connector or driver it protects so transient loop area stays minimal. Standard SOT-23 land patterns are adequate; adding a small thermal relief into adjacent copper improves continuous-dissipation capability toward the 350 mW rating in enclosed products. Verify the footprint pin assignment against the CMPZDC series datasheet package drawing before release, since the exact terminal numbering was not captured in the verified data for this page.
Compliance Information
Standard CMPZDC15V TR contains lead; the CMPZDC15V TR PBFREE variant is the lead-free/RoHS option listed by Mouser. REACH, halogen-free, and conflict-minerals status not stated in the provided data.
