CMMR1U-02 TR Central Semiconductor Diode (Small Outline Diode Flat Lead) In Stock
Central Semiconductor CMMR1U-02 TR is a single ultra-fast silicon rectifier diode rated for 1 A average forward current and 200 V peak reverse voltage in a compact flat-lead small outline package. Ultra-fast recovery time below 50 ns suits high-frequency power conversion. Supplied in tape-and-reel for SMT automated assembly worldwide.
- Manufacturer
- Central Semiconductor
- Package
- Small Outline Diode Flat Lead
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- CMMR1U-02 TR Datasheet PDF
- Category
- Diode
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CMMR1U-02 TR?
- 200 V peak reverse voltage (PRV) rating providing robust blocking capability in AC-DC rectifier and flyback converter output stages
- Ultra-fast reverse recovery time under 50 ns enabling efficient rectification at switching frequencies from 100 kHz to 1 MHz
- 1 A average forward current capacity supporting moderate-power supply, freewheeling, and clamp circuit designs
- Compact small-outline flat-lead (SOD) SMT package reducing PCB area compared to DO-41 or SMA through-hole rectifiers
What is CMMR1U-02 TR used for?
The CMMR1U-02 TR is designed for ultra-fast rectification in switch-mode power supplies, freewheeling diode applications, and high-frequency output rectifier stages operating at switching frequencies up to 1 MHz. Its 200 V PRV and 1 A current rating make it suitable for secondary-side rectification in flyback and forward converters with output voltages up to 90 V. The flat-lead SMT package is well matched to compact power modules, battery chargers, and LED driver circuits where PCB space and SMT process compatibility are important.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the CMMR1U-02 TR datasheet?
CMMR1U-02 TR Datasheet DownloadOfficial datasheet from Central Semiconductor
What are equivalent replacements for CMMR1U-02 TR?
Compatible alternatives and drop-in replacements for CMMR1U-02 TR:
suggested
Frequently Asked Questions
What is the reverse voltage and forward current rating of the CMMR1U-02 ultra-fast rectifier?
The CMMR1U-02 is rated for a 200 V peak reverse voltage and 1 A average forward current, allowing it to handle AC-DC rectification or freewheeling duties in power supply circuits operating from 85 V AC to 130 V AC input with adequate safety margin below the 200 V PRV limit.
At which switching frequencies does the CMMR1U-02 ultra-fast recovery provide meaningful efficiency gains over standard rectifiers?
The CMMR1U-02's ultra-fast reverse recovery time below 50 ns significantly reduces switching losses compared to standard PN rectifiers with 200 ns to 500 ns recovery times at operating frequencies above 50 kHz. In a 200 kHz flyback converter, replacing a slow rectifier with the CMMR1U-02 can cut rectifier-related switching losses by 60% to 80%, improving overall converter efficiency by 1 to 3 percentage points.
How does the CMMR1U-02's flat-lead SOD package affect thermal management in a power circuit?
The small-outline flat-lead package of the CMMR1U-02 has a limited thermal resistance from junction to ambient, typically 300 °C/W to 500 °C/W, constraining continuous dissipation to well below 500 mW at room temperature. For 1 A load, designers should verify that forward voltage drop (typically 1.0 V to 1.7 V) keeps power dissipation within the package's thermal budget, using copper pour or a thermal pad when ambient temperature exceeds 50 °C.
When is the CMMR1U-02 a suitable alternative to the 1N4148 in a high-frequency rectifier circuit?
The CMMR1U-02 is preferred over the 1N4148 when the peak reverse voltage requirement exceeds 100 V, since the CMMR1U-02 provides 200 V PRV versus the 1N4148's 100 V rating, and when average forward current exceeds 200 mA. Both are ultra-fast with sub-50 ns recovery, but the CMMR1U-02's 1 A current rating and 200 V blocking voltage make it better suited for mains-referred secondary rectifier stages in switch-mode power supplies.
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About Central Semiconductor
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