Toshiba Semiconductor and Storage CMH08(TE12L,Q,M)

Overview

CMH08(TE12L,Q,M) from Toshiba is a high-efficiency, silicon epitaxial fast recovery rectifier diode designed for switching-mode power supply (SMPS) output rectification. It delivers V_RRM = 400 V, I_F(AV) = 2.0 A at T_ℓ = 110°C, V_FM ≤ 1.3 V at 2.0 A, t_rr ≤ 50 ns, and uses the compact surface-mount M-FLAT™ package.

For engineers reviewing the CMH08(TE12L,Q,M) datasheet, CMH08(TE12L,Q,M) pinout, CMH08(TE12L,Q,M) application, or CMH08(TE12L,Q,M) equivalent, key selection criteria include fast recovery performance in high-frequency SMPS, low forward voltage drop under load, thermal management on ceramic or glass-epoxy PCBs, and compliance with industrial-grade reliability derating guidelines.

Technical Context

The CMH08(TE12L,Q,M) is a single-die, planar-passivated, epitaxial junction fast recovery rectifier optimized for high-efficiency DC-DC conversion stages. Its 50 ns maximum reverse recovery time and low stored charge enable reduced switching losses in 100–500 kHz SMPS topologies.

It operates across −40°C to +150°C junction temperature range and requires derated use per Toshiba's Reliability Handbook-e.g., V_RRM limited to 50% of rating in AC circuits and I_F(AV) capped at 80% of absolute max under worst-case thermal conditions.

Key Specifications

Pinout & Package

CMH08(TE12L,Q,M) uses the Toshiba M-FLAT™ surface-mount package (JEITA package code 3-4E1A), measuring 3.0 mm × 1.4 mm × 1.2 mm with gull-wing leads. The device has two terminals: anode and cathode, mounted on a single-side metallized die pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast recovery rectifier applications.

Compared with STTH2R04 and RB055LAM-40, the CMH08(TE12L,Q,M) uniquely balances 400 V capability, 2 A average current, sub-50 ns recovery, and ultra-compact M-FLAT™ packaging-making it optimal for space-constrained, high-frequency industrial SMPS where thermal path to PCB is controllable.

Availability

CMH08(TE12L,Q,M) is available at Aetrix Electronics and suitable for AC-DC adapters, DC-DC converters, LED drivers, and server PSU modules requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.

Supply support for CMH08(TE12L,Q,M) 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

Toshiba Electronic Devices & Storage Corporation is a Japanese semiconductor manufacturer specializing in power devices, logic ICs, and memory solutions, with decades of expertise in discrete rectifiers and MOSFETs.

The CMH08(TE12L,Q,M) belongs to Toshiba's high-efficiency fast recovery rectifier product line, engineered specifically for high-frequency switching power supplies demanding low V_F, fast t_rr, and reliable thermal performance in surface-mount form factors.

FAQ

What is the maximum allowable junction temperature for CMH08(TE12L,Q,M)?

The absolute maximum junction temperature (T_j) for CMH08(TE12L,Q,M) is +150°C, as specified in Toshiba's Absolute Maximum Ratings table. However, Toshiba recommends limiting continuous operation to T_j ≤ 120°C under worst-case load and thermal conditions to ensure long-term reliability. Derating guidance and thermal design methods are detailed in the Toshiba Semiconductor Reliability Handbook.

Does CMH08(TE12L,Q,M) have a specified junction-to-lead thermal resistance?

Yes, CMH08(TE12L,Q,M) has a specified R_th(j−ℓ) of 16 °C/W, measured from junction to lead under standard test conditions. This parameter is critical for lead-temperature-limited designs and enables accurate estimation of junction temperature when lead temperature is monitored directly on the PCB.

What is the reverse recovery time specification for CMH08(TE12L,Q,M)?

The reverse recovery time (t_rr) for CMH08(TE12L,Q,M) is guaranteed ≤ 50 ns under test conditions of I_F = 1 A and di/dt = −30 A/μs. This value is confirmed in the Electrical Characteristics table and supports efficient operation in switching power supplies operating up to approximately 500 kHz.

Is CMH08(TE12L,Q,M) RoHS compliant?

Yes, CMH08(TE12L,Q,M) complies with the EU RoHS Directive. Toshiba confirms RoHS compliance for this part in its official environmental documentation. Customers must verify the latest compliance status via Toshiba's official environmental reports or contact their Toshiba sales representative for certified declarations.

What board layout recommendations apply to CMH08(TE12L,Q,M) for thermal performance?

Toshiba specifies three validated mounting configurations: (1) 2 mm × 2 mm solder land on 0.64 mm ceramic board for I_F(AV) = 2.0 A; (2) 6 mm × 6 mm land on 1.6 mm glass-epoxy board (R_th(j−a) = 135 °C/W); and (3) 2.1 mm × 1.4 mm land on same board (R_th(j−a) = 210 °C/W). Thermal performance is highly dependent on these exact dimensions and materials.